Journal of Microbiology

Most-cited are based on citations from 2024 ~ 2026.

Reviews

Understanding the Diversity and Roles of the Ruminal Microbiome: Gi Beom Keum, Sriniwas Pandey, Eun Sol Kim, Hyunok Doo, Jinok Kwak, Sumin Ryu, Yejin Choi, Juyoun Kang, Sheena Kim, Hyeun Bum Kim; J. Microbiol. 2024;62(3):217-230. Published online April 25, 2024; DOI: https://doi.org/10.1007/s12275-024-00121-4

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The importance of ruminal microbiota in ruminants is emphasized, not only as a special symbiotic relationship with ruminants but also as an interactive and dynamic ecosystem established by the metabolites of various rumen microorganisms. Rumen microbial community is essential for life maintenance and production as they help decompose and utilize fber that is difcult to digest, supplying about 70% of the energy needed by the host and 60–85% of the amino acids that reach the small intestine. Bacteria are the most abundant in the rumen, but protozoa, which are relatively large, account for 40–50% of the total microorganisms. However, the composition of these ruminal microbiota is not conserved or constant throughout life and is greatly infuenced by the host. It is known that the initial colonization of calves immediately after birth is mainly infuenced by the mother, and later changes depending on various factors such as diet, age, gender and breed. The initial rumen microbial community contains aerobic and facultative anaerobic bacteria due to the presence of oxygen, but as age increases, a hypoxic environment is created inside the rumen, and anaerobic bacteria become dominant in the rumen microbial community. As calves grow, taxonomic diversity increases, especially as they begin to consume solid food. Understanding the factors afecting the rumen microbial community and their efects and changes can lead to the early development and stabilization of the microbial community through the control of rumen microorganisms, and is expected to ultimately help improve host productivity and efciency.

Citations

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Intestinal microbiota dysbiosis in bovine mastitis: Its role and strategies for prevention and control targeting intestinal microbiota
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The microbiome’s influence on obesity: mechanisms and therapeutic potential
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Science China Life Sciences.2025; 68(3): 657. CrossRef
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International Symposium on Ruminant Physiology: Stochastic and deterministic factors that shape the rumen microbiome
Samodha C. Fernando, Seidu Adams, Andrew Lakamp, Matthew L. Spangler
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Genome analysis of Lactococcus taiwanensis strain K_LL001 with potential cellulose degrading functions
Eun Sol Kim, Jin Ho Cho, Minho Song, Sheena Kim, Gi Beom Keum, Hyunok Doo, Jinok Kwak, Sriniwas Pandey, Sumin Ryu, Yejin Choi, Juyoun Kang, Hyeun Bum Kim, Ju-Hoon Lee
Journal of Animal Science and Technology.2025; 67(1): 273. CrossRef
Dynamic Changes in Rumen Microbial Diversity and Community Composition Within Rumen Fluid in Response to Various Storage Temperatures and Preservation Times
Chang Liu, Jin Cheng, Yunong Xie, Kehui Ouyang, Mingren Qu, Ke Pan, Qinghua Qiu
Veterinary Sciences.2025; 12(3): 234. CrossRef
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Manman Fan, Jinming Hu, Cheng Liu, Shuo Zhang, Yufeng Liu, Guangyong Zhao
Animal Nutrition.2025; 22: 1. CrossRef
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Yueting Pan, Gege Sun, Guo Li, Shuaicheng Chen, Haibing Liu, Huaxuan Li, Chugang Mei, Wucai Yang, Linsen Zan
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Evaluation of kefir consumption on gut microbial diversity in a healthy young population using full-length 16S rRNA sequencing
Yejin Choi, Gi Beom Keum, Juyoun Kang, Hyunok Doo, Jinok Kwak, Haram Kim, Yeongjae Chae, Suyoung Lee, Hyunjin Yang, Sheena Kim, Xingmin Sun, Hyeun Bum Kim, Soo Jin Yoo
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The interaction between rumen microbiota and neurotransmitters plays an important role in the adaptation of phenological changes in Tibetan sheep
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Wenwen Lu, Jinling Hua, Min Zhang, Longfei Yan, Huwei Zhao, Xiaokang Lv
Scientific Reports.2025;[Epub] CrossRef
The Effect of Sodium Humate on Sheep In Vitro Fermentation Characteristics and Rumen Bacterial Community
Na Yin, Yuchao Hu, Xiangting Cai, Long Gao, Wenwen Wang, Yuan Wang, Jingwei Qi
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A refined comparative mouse model of acute and chronic atopic dermatitis
Jinok Kwak, Hyunok Doo, Eun Sol Kim, Gi Beom Keum, Sumin Ryu, Yejin Choi, Juyoun Kang, Haram Kim, Yeongjae Chae, Sheena Kim, Ju-Hoon Lee, Hyeun Bum Kim
Journal of Animal Science and Technology.2025; 67(3): 636. CrossRef
Effect of Diet and Lifestyle Changes on Gut Microbial Diversity in Healthy Adolescents
Juyoun Kang, Yejin Choi, Gi Beom Keum, Hyunok Doo, Jinok Kwak, Haram Kim, Yeongjae Chae, Suyoung Lee, Hyunjin Yang, Sheena Kim, Xingmin Sun, Hyeun Bum Kim, Soo Jin Yoo
Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef
Understanding the diversity and roles of the canine gut microbiome
Haram Kim, Yeongjae Chae, Jin Ho Cho, Minho Song, Jinok Kwak, Hyunok Doo, Yejin Choi, Juyoun Kang, Hyunjin Yang, Suyoung Lee, Gi Beom Keum, Suphot Wattanaphansak, Sheena Kim, Hyeun Bum Kim
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The ins and outs of integrative digestive biology
Carol Bucking, John S. Terblanche, Matthew D. Regan
Journal of Experimental Biology.2025;[Epub] CrossRef
Analysis of the Microbiota of Milk from Holstein–Friesian Dairy Cows Fed a Microbial Supplement
Bronwyn E. Campbell, Mohammad Mahmudul Hassan, Timothy Olchowy, Shahab Ranjbar, Martin Soust, Orlando Ramirez-Garzon, Rafat Al Jassim, Robert J. Moore, John I. Alawneh
Animals.2025; 15(14): 2124. CrossRef
Complete genome sequence of Lactiplantibacillus plantarum strain GA_C_14 with potential characteristics applicable in the swine industry
Sumin Ryu, Hyunok Doo, Eun Sol Kim, Gi Beom Keum, Jinok Kwak, Sriniwas Pandey, Yejin Choi, Juyoun Kang, Sheena Kim, Hyeun Bum Kim, Ju-Hoon Lee
Journal of Animal Science and Technology.2025; 67(4): 944. CrossRef
Heated drinking water in winter improves growth performance of male Hu sheep by modulating rumen quorum sensing and metabolites, and enhancing serum antioxidant capacity
Chang Liu, Lingyan Li, Jiaqi Dai, Mingren Qu, Kehui Ouyang, Qinghua Qiu
Animal Bioscience.2025; 38(10): 2280. CrossRef
Artificial Intelligence in Microbiome Research and Beyond: Connecting Human Health, Animal Husbandry, and Aquaculture
Silvio Rizzi, Giulio Saroglia, Violeta Kalemi, Simona Rimoldi, Genciana Terova
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Bovine Lymphocyte Intestinal Retention Defect (BLIRD): a novel recessive immunogenetic disorder in Holstein cattle
Lucie Dutheil, Blandine Gausseres, Florian Besnard, Laurence Guzylack-Piriou, Yanad Abou Monsef, Nicolas Gaide, Lisa Arnalot, Fabien Corbiere, Marie Gaborit, Frédéric Launay, Agnès Poujade, Aurélien Capitan, Gilles Foucras
Veterinary Quarterly.2025;[Epub] CrossRef
Self-reported hopefulness and cognitive function: the moderating effect of physical activity in older adults without cognitive impairment
Boung Chul Lee, Young Min Choe, Ji-Hyun Kim, Hye Ji Choi, Guk-Hee Suh, Shin Gyeom Kim, Hyun Soo Kim, Jaeuk Hwang, Dahyun Yi, Jee Wook Kim
Frontiers in Aging Neuroscience.2025;[Epub] CrossRef
Effects of Oregano Essential Oil and/or Yeast Cultures on the Rumen Microbiota of Crossbred Simmental Calves
Ting Liu, Zhihao Luo, Tao Zhang, Huan Chen, Xuejiao Yi, Jiang Hu, Bingang Shi, Yuxi An, Changze Cui, Xiangyan Wang
Animals.2024; 14(24): 3710. CrossRef
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Woo Jun Sul
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GnRH Immunocastration in Male Xizang Sheep: Impacts on Rumen Microbiome and Metabolite Profiles for Enhanced Health and Productivity
Xiaoming Zhang, Tianzeng Song, Guiqiong Liu, Jing Wu, Yangzong Zhaxi, Shehr Bano Mustafa, Khuram Shahzad, Xiaoying Chen, Wangsheng Zhao, Xunping Jiang
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Astghik Pepoyan
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Exploring the Spatial Variation in the Microbiota and Bile Acid Metabolism of the Compound Stomach in Intensively Farmed Yaks
Shichun He, Zaimei Yuan, Sifan Dai, Zibei Wang, Shusheng Zhao, Bin Zhang, Huaming Mao, Dongwang Wu
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Investigation of the impact of multi-strain probiotics containing Saccharomyces cerevisiae on porcine production
Sheena Kim, Jinho Cho, Gi Beom Keum, Jinok Kwak, Hyunok Doo, Yejin Choi, Juyoun Kang, Haram Kim, Yeongjae Chae, Eun Sol Kim, Minho Song, Hyeun Bum Kim
Journal of Animal Science and Technology.2024; 66(5): 876. CrossRef
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Skin Deep: The Potential of Microbiome Cosmetics: Ju Hee Han, Hei Sung Kim; J. Microbiol. 2024;62(3):181-199. Published online April 16, 2024; DOI: https://doi.org/10.1007/s12275-024-00128-x

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24 Web of Science
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Abstract PDF

The interplay between the skin microbiome and its host is a complex facet of dermatological health and has become a critical focus in the development of microbiome cosmetics. The skin microbiome, comprising various microorganisms, is essential from birth, develops over the lifespan, and performs vital roles in protecting our body against pathogens, training the immune system, and facilitating the breakdown of organic matter. Dysbiosis, an imbalance of these microorganisms, has been implicated in a number of skin conditions such as acne, atopic dermatitis, and skin cancer. Recent scientific findings have spurred cosmetic companies to develop products that preserve and enhance the skin's microbial diversity balance. These products may incorporate elements like prebiotics, probiotics, and postbiotics, which are beneficial for the skin microbiome. Beyond topical products, there's increasing interest in ingestible beauty supplements (i.e. oral probiotics), highlighting the connection between the gut and skin. This review examines the influence of the microbiome on skin health and the emerging trends of microbiome skincare products.

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Balancing Act of the Intestinal Antimicrobial Proteins on Gut Microbiota and Health: Ye Eun Ra, Ye‑Ji Bang; J. Microbiol. 2024;62(3):167-179. Published online April 17, 2024; DOI: https://doi.org/10.1007/s12275-024-00122-3

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Abstract PDF

The human gut houses a diverse and dynamic microbiome critical for digestion, metabolism, and immune development, exerting profound efects on human health. However, these microorganisms pose a potential threat by breaching the gut barrier, entering host tissues, and triggering infections, uncontrolled infammation, and even sepsis. The intestinal epithelial cells form the primary defense, acting as a frontline barrier against microbial invasion. Antimicrobial proteins (AMPs), produced by these cells, serve as innate immune efectors that regulate the gut microbiome by directly killing or inhibiting microbes. Abnormal AMP production, whether insufcient or excessive, can disturb the microbiome equilibrium, contributing to various intestinal diseases. This review delves into the complex interactions between AMPs and the gut microbiota and sheds light on the role of AMPs in governing host-microbiota interactions. We discuss the function and mechanisms of action of AMPs, their regulation by the gut microbiota, microbial evasion strategies, and the consequences of AMP dysregulation in disease. Understanding these complex interactions between AMPs and the gut microbiota is crucial for developing strategies to enhance immune responses and combat infections within the gut microbiota. Ongoing research continues to uncover novel aspects of this intricate relationship, deepening our understanding of the factors shaping gut health. This knowledge has the potential to revolutionize therapeutic interventions, ofering enhanced treatments for a wide range of gut-related diseases.

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MAPK Cascades in Plant Microbiota Structure and Functioning: Thijs Van Gerrewey, Hoo Sun Chung; J. Microbiol. 2024;62(3):231-248. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00114-3

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Abstract PDF

Mitogen-activated protein kinase (MAPK) cascades are highly conserved signaling modules that coordinate diverse biological processes such as plant innate immunity and development. Recently, MAPK cascades have emerged as pivotal regulators of the plant holobiont, infuencing the assembly of normal plant microbiota, essential for maintaining optimal plant growth and health. In this review, we provide an overview of current knowledge on MAPK cascades, from upstream perception of microbial stimuli to downstream host responses. Synthesizing recent fndings, we explore the intricate connections between MAPK signaling and the assembly and functioning of plant microbiota. Additionally, the role of MAPK activation in orchestrating dynamic changes in root exudation to shape microbiota composition is discussed. Finally, our review concludes by emphasizing the necessity for more sophisticated techniques to accurately decipher the role of MAPK signaling in establishing the plant holobiont relationship.

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Adenoviral Vector System: A Comprehensive Overview of Constructions, Therapeutic Applications and Host Responses: Anyeseu Park, Jeong Yoon Lee; J. Microbiol. 2024;62(7):491-509. Published online July 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00159-4

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Abstract PDF

Adenoviral vectors are crucial for gene therapy and vaccine development, offering a platform for gene delivery into host cells. Since the discovery of adenoviruses, first-generation vectors with limited capacity have evolved to third-generation vectors flacking viral coding sequences, balancing safety and gene-carrying capacity. The applications of adenoviral vectors for gene therapy and anti-viral treatments have expanded through the use of in vitro ligation and homologous recombination, along with gene editing advancements such as CRISPR-Cas9. Current research aims to maintain the efficacy and safety of adenoviral vectors by addressing challenges such as pre-existing immunity against adenoviral vectors and developing new adenoviral vectors from rare adenovirus types and non-human species. In summary, adenoviral vectors have great potential in gene therapy and vaccine development. Through continuous research and technological advancements, these vectors are expected to lead to the development of safer and more effective treatments.

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Biological and Chemical Approaches for Controlling Harmful Microcystis Blooms: Wonjae Kim, Yerim Park, Jaejoon Jung, Che Ok Jeon, Masanori Toyofuku, Jiyoung Lee, Woojun Park; J. Microbiol. 2024;62(3):249-260. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00115-2

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The proliferation of harmful cyanobacterial blooms dominated by Microcystis aeruginosa has become an increasingly serious problem in freshwater ecosystems due to climate change and eutrophication. Microcystis-blooms in freshwater generate compounds with unpleasant odors, reduce the levels of dissolved O₂, and excrete microcystins into aquatic ecosystems, potentially harming various organisms, including humans. Various chemical and biological approaches have thus been developed to mitigate the impact of the blooms, though issues such as secondary pollution and high economic costs have not been adequately addressed. Red clays and H₂O₂ are conventional treatment methods that have been employed worldwide for the mitigation of the blooms, while novel approaches, such as the use of plant or microbial metabolites and antagonistic bacteria, have also recently been proposed. Many of these methods rely on the generation of reactive oxygen species, the inhibition of photosynthesis, and/or the disruption of cellular membranes as their mechanisms of action, which may also negatively impact other freshwater microbiota. Nevertheless, the underlying molecular mechanisms of anticyanobacterial chemicals and antagonistic bacteria remain unclear. This review thus discusses both conventional and innovative approaches for the management of M. aeruginosa in freshwater bodies.

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Progress and challenges in CRISPR/Cas applications in microalgae: Quynh-Giao Tran, Trang Thi Le, Dong-Yun Choi, Dae-Hyun Cho, Jin-Ho Yun, Hong Il Choi, Hee-Sik Kim, Yong Jae Lee; J. Microbiol. 2025;63(3):e2501028. Published online March 28, 2025; DOI: https://doi.org/10.71150/jm.2501028

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Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) technologies have emerged as powerful tools for precise genome editing, leading to a revolution in genetic research and biotechnology across diverse organisms including microalgae. Since the 1950s, microalgal production has evolved from initial cultivation under controlled conditions to advanced metabolic engineering to meet industrial demands. However, effective genetic modification in microalgae has faced significant challenges, including issues with transformation efficiency, limited target selection, and genetic differences between species, as interspecies genetic variation limits the use of genetic tools from one species to another. This review summarized recent advancements in CRISPR systems applied to microalgae, with a focus on improving gene editing precision and efficiency, while addressing organism-specific challenges. We also discuss notable successes in utilizing the class 2 CRISPR-associated (Cas) proteins, including Cas9 and Cas12a, as well as emerging CRISPR-based approaches tailored to overcome microalgal cellular barriers. Additionally, we propose future perspectives for utilizing CRISPR/Cas strategies in microalgal biotechnology.

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Over the past two decades, as the importance of gut microbiota to human health has become widely known, attempts have been made to treat diseases by correcting dysbiosis of gut microbiota through fecal microbiota transplantation (FMT). Apart from current knowledge of gut microbiota, FMT to treat disease has a long history, from the treatment of food poisoning in the fourth century to the treatment of Clostridioides difficile infections in the twentieth century. In 2013, FMT was recognized as a standard treatment for recurrent C. difficile because it consistently showed high efficacy. Though recurrent C. difficile is the only disease internationally recognized for FMT efficacy, FMT has been tested for other diseases and shown some promising preliminary results. Different FMT methods have been developed using various formulations and administration routes. Despite advances in FMT, some issues remain to be resolved, such as donor screening, manufacturing protocols, and unknown components in the fecal microbiota. In this review, we discuss the mechanisms, clinical indications, methods, and challenges of current FMT. We also discuss the development of alternative therapies to overcome the challenges of FMT.

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Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture: Meora Rajeev, Jang-Cheon Cho; J. Microbiol. 2024;62(11):985-997. Published online November 15, 2024; DOI: https://doi.org/10.1007/s12275-024-00187-0

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Bioflocs are microbial aggregates primarily composed of heterotrophic bacteria that play essential ecological roles in maintaining animal health, gut microbiota, and water quality in biofloc aquaculture systems. Despite the global adoption of biofloc aquaculture for shrimp and fish cultivation, our understanding of biofloc microbiota-particularly the dominant bacterial members and their ecological functions-remains limited. In this study, we employed integrated metataxonomic and metagenomic approaches to demonstrate that the family Rhodobacteraceae of Alphaproteobacteria consistently dominates the biofloc microbiota and plays essential ecological roles. We first analyzed a comprehensive metataxonomic dataset consisting of 200 16S rRNA gene amplicons collected across three Asian countries: South Korea, China, and Vietnam. Taxonomic investigation identified Rhodobacteraceae as the dominant and consistent bacterial members across the datasets. The predominance of this taxon was further validated through metagenomics approaches, including read taxonomy and read recruitment analyses. To explore the ecological roles of Rhodobacteraceae, we applied genome-centric metagenomics, reconstructing 45 metagenome-assembled genomes. Functional annotation of these genomes revealed that dominant Rhodobacteraceae genera, such as Marivita, Ruegeria, Dinoroseobacter, and Aliiroseovarius, are involved in vital ecological processes, including complex carbohydrate degradation, aerobic denitrification, assimilatory nitrate reduction, ammonium assimilation, and sulfur oxidation. Overall, our study reveals that the common practice of carbohydrate addition in biofloc aquaculture systems fosters the growth of specific heterotrophic bacterial communities, particularly Rhodobacteraceae. These bacteria contribute to maintaining water quality by removing toxic nitrogen and sulfur compounds and enhance animal health by colonizing gut microbiota and exerting probiotic effects.

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Lactobacillus acidophilus KBL409 Ameliorates Atopic Dermatitis in a Mouse Model: Woon-ki Kim , You Jin Jang , SungJun Park , Sung-gyu Min , Heeun Kwon , Min Jung Jo , GwangPyo Ko; J. Microbiol. 2024;62(2):91-99. Published online February 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00104-5

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Abstract PDF

Atopic dermatitis (AD) is a chronic inflammatory skin disease with repeated exacerbations of eczema and pruritus. Probiotics can prevent or treat AD appropriately via modulation of immune responses and gut microbiota. In this study, we evaluated effects of Lactobacillus acidophilus (L. acidophilus) KBL409 using a house dust mite (Dermatophagoides farinae)-induced in vivo AD model. Oral administration of L. acidophilus KBL409 significantly reduced dermatitis scores and decreased infiltration of immune cells in skin tissues. L. acidophilus KBL409 reduced in serum immunoglobulin E and mRNA levels of T helper (Th)1 (Interferon-γ), Th2 (Interleukin [IL]-4, IL-5, IL-13, and IL-31), and Th17 (IL-17A) cytokines in skin tissues. The anti-inflammatory cytokine IL-10 was increased and Foxp3 expression was up-regulated in AD-induced mice with L. acidophilus KBL409. Furthermore, L. acidophilus KBL409 significantly modulated gut microbiota and concentrations of short-chain fatty acids and amino acids, which could explain its effects on AD. Our results suggest that L. acidophilus KBL409 is the potential probiotic for AD treatment by modulating of immune responses and gut microbiota of host.

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Limosilactobacillus fermentum KBL674 Alleviates Vaginal Candidiasis
Sung Jae Jang, Eun Jung Jo, Cheonghoon Lee, Bo-Ram Cho, Yun Jeong Shin, Jun Soo Song, Woon-Ki Kim, Nanhee Lee, Hyungjin Lee, SungJun Park, GwangPyo Ko
Probiotics and Antimicrobial Proteins.2025; 17(6): 4580. CrossRef
The gut-skin axis: a bi-directional, microbiota-driven relationship with therapeutic potential
Maira Jimenez-Sanchez, Larissa S. Celiberto, Hyungjun Yang, Ho Pan Sham, Bruce A. Vallance
Gut Microbes.2025;[Epub] CrossRef
Probiotics ameliorate atopic dermatitis by modulating the dysbiosis of the gut microbiota in dogs
Hyokeun Song, Seung-Hyun Mun, Dae-Woong Han, Jung-Hun Kang, Jae-Uk An, Cheol-Yong Hwang, Seongbeom Cho
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The effect of daily oral probiotic and postbiotic supplementation on the canine skin microbiota: Insights from culture‐dependent and long‐read 16S rRNA gene sequencing methods
Letitia Grant, Manijeh Mohammadi Dehcheshmeh, Esmaeil Ebrahimie, Aliakbar Khabiri, Tania Veltman, Michael Shipstone, Darren J. Trott
Veterinary Dermatology.2025; 36(5): 581. CrossRef
The efficacy of Akkermansia muciniphila YGMCC2602-derived postbiotics in skin repair
Zhili He, Wenfang Song, Shichang Zhang, Minlei Zhao, Fan Wang, Shanshan He, Xiaochi Jie, Qi Gao, Jianguo Chen
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Matthew H. Foley, Arthur S. McMillan, Sarah O'Flaherty, Rajani Thanissery, Molly E. Vanhoy, Mary Gracen Fuller, Rodolphe Barrangou, Casey M. Theriot, Jacques Ravel
mBio.2025;[Epub] CrossRef
Innovative microbial strategies in atopic dermatitis
Jingtai Ma, Yiting Fang, Jinxing Hu, Shiqi Li, Lilian Zeng, Siyi Chen, Zhifeng Li, Ruiling Meng, Xingfen Yang, Fenglin Zhang, Guiyuan Ji, Peihua Liao, Liang Chen, Wei Wu
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Pedro Brivaldo Viana da Silva, Thiécla Katiane Osvaldt Rosales, João Paulo Fabi
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Microbiota Modulation as an Approach to Prevent the Use of Antimicrobials Associated with Canine Atopic Dermatitis
Tânia Lagoa, Luís Martins, Maria Cristina Queiroga
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Lactobacillus crispatus KBL693 alleviates atopic dermatitis symptoms through immune modulation
Seokcheon Song, Jun-Hyeong Kim, Sung Jae Jang, Eun Jung Jo, Sang Kyun Lim, GwangPyo Ko
Journal of Microbiology.2025; 63(10): e2509005. CrossRef
Oral Administration of Lactiplantibacillus plantarum KBL396 Regulates Serum 5-Hydroxytryptamine and Gut Microbiota: Evidence from a Preclinical Mouse Model and a Randomized Controlled Human Trial
Woojae Myung, Sung Jae Jang, Giljae Lee, Cheonghoon Lee, Kiuk Lee, Sung Hyun Moon, Yunsun Jeong, Woon-Ki Kim, SungJun Park, Hyungjin Lee, Yun Seong Park, Sangah Shin, Tae-Wook Nam, Hong Jin Jeon, GwangPyo Ko
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The Skin Histopathology of Pro- and Parabiotics in a Mouse Model of Atopic Dermatitis
Hun Hwan Kim, Se Hyo Jeong, Min Yeong Park, Pritam Bhagwan Bhosale, Abuyaseer Abusaliya, Jeong Doo Heo, Hyun Wook Kim, Je Kyung Seong, Tae Yang Kim, Jeong Woo Park, Byeong Soo Kim, Gon Sup Kim
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Furan-based Chalcone Annihilates the Multi-Drug-Resistant Pseudomonas aeruginosa and Protects Zebra Fish against its Infection: Santosh Pushpa Ramya Ranjan Nayak , Catharine Basty , Seenivasan Boopathi , Loganathan Sumathi Dhivya , Khaloud Mohammed Alarjani , Mohamed Ragab Abdel Gawwad , Raghda Hager , Muthu Kumaradoss Kathiravan , Jesu Arockiaraj; J. Microbiol. 2024;62(2):75-89. Published online February 21, 2024; DOI: https://doi.org/10.1007/s12275-024-00103-6

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The emergence of carbapenem-resistant Pseudomonas aeruginosa, a multi-drug-resistant bacteria, is becoming a serious public health concern. This bacterium infects immunocompromised patients and has a high fatality rate. Both naturally and synthetically produced chalcones are known to have a wide array of biological activities. The antibacterial properties of synthetically produced chalcone were studied against P. aeruginosa. In vitro, study of the compound (chalcone derivative named DKO1), also known as (2E)-1-(5-methylfuran-2-yl)-3-(4-nitrophenyl) prop-2-en-1-one, had substantial antibacterial and biofilm disruptive action. DKO1 effectively shielded against P. aeruginosa-induced inflammation, oxidative stress, lipid peroxidation, and apoptosis in zebrafish larvae. In adult zebrafish, the treatment enhanced the chances of survivability and reduced the sickness-like behaviors. Gene expression, biochemical analysis, and histopathology studies found that proinflammatory cytokines (TNF-α, IL-1β, IL-6, iNOS) were down regulated; antioxidant enzymes such as superoxide dismutase (SOD) and catalase (CAT) levels increased, and histoarchitecture was restored in zebrafish. The data indicate that DKO1 is an effective antibacterial agent against P. aeruginosa demonstrated both in vitro and in vivo.

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Mammaliicoccus sciuri's Pan-Immune System and the Dynamics of Horizontal Gene Transfer among Staphylococcaceae: a One-Health CRISPR Tale: Allan de Carvalho, Marcia Giambiagi-deMarval, Ciro César Rossi; J. Microbiol. 2024;62(9):775-784. Published online July 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00156-7

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Recently emancipated from the Staphylococcus genus due to genomic differences, Mammaliicoccus sciuri, previously classified as an occasional pathogen, emerges as a significant player in the landscape of resistance gene dissemination among Staphylococcaceae. Despite its classification, its role remained enigmatic. In this study, we delved into the genomic repertoire of M. sciuri to unravel its contribution to resistance and virulence gene transfer in the context of One Health. Through comprehensive analysis of publicly available genomes, we unveiled a diverse pan-immune system adept at defending against exogenous genetic elements, yet concurrently fostering horizontal gene transfer (HGT). Specifically, exploration of CRISPR-Cas systems, with spacer sequences as molecular signatures, elucidated a global dissemination pattern spanning environmental, animal, and human hosts. Notably, we identified the integration of CRISPR-Cas systems within SCCmecs (Staphylococcal Cassette Chromosome mec), harboring key genes associated with pathogenicity and resistance, especially the methicillin resistance gene mecA, suggesting a strategic adaptation to outcompete other mobile genetic elements. Our findings underscored M. sciuri's active engagement in HGT dynamics and evolutionary trajectories within Staphylococcaceae, emphasizing its central role in shaping microbial communities and highlighting the significance of understanding its implications in the One Health framework, an interdisciplinary approach that recognizes the interconnectedness of human, animal, and environmental health to address global health challenges.

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Reviews

Metabolic Interaction between Host and the Gut Microbiota during High-Fat Diet-Induced Colorectal Cancer: Chaeeun Lee, Seungrin Lee, Woongjae Yoo; J. Microbiol. 2024;62(3):153-165. Published online April 16, 2024; DOI: https://doi.org/10.1007/s12275-024-00123-2

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Abstract PDF

Colorectal cancer (CRC) is the second-highest cause of cancer-associated mortality among both men and women worldwide. One of the risk factors for CRC is obesity, which is correlated with a high-fat diet prevalent in Western dietary habits. The association between an obesogenic high-fat diet and CRC has been established for several decades; however, the mechanisms by which a high-fat diet increases the risk of CRC remain unclear. Recent studies indicate that gut microbiota strongly infuence the pathogenesis of both high-fat diet-induced obesity and CRC. The gut microbiota is composed of hundreds of bacterial species, some of which are implicated in CRC. In particular, the expansion of facultative anaerobic Enterobacteriaceae, which is considered a microbial signature of intestinal microbiota functional imbalance (dysbiosis), is associated with both high-fat diet-induced obesity and CRC. Here, we review the interaction between the gut microbiome and its metabolic byproducts in the context of colorectal cancer (CRC) during high-fat diet-induced obesity. In addition, we will cover how a high-fat diet can drive the expansion of genotoxin-producing Escherichia coli by altering intestinal epithelial cell metabolism during gut infammation conditions.

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Advancements in dengue vaccines: A historical overview and pro-spects for following next-generation candidates: Kai Yan, Lingjing Mao, Jiaming Lan, Zhongdang Xiao; J. Microbiol. 2025;63(2):e2410018. Published online February 27, 2025; DOI: https://doi.org/10.71150/jm.2410018

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Abstract PDF

Dengue, caused by four serotypes of dengue viruses (DENV-1 to DENV-4), is the most prevalent and widely mosquito-borne viral disease affecting humans. Dengue virus (DENV) infection has been reported in over 100 countries, and approximately half of the world's population is now at risk. The paucity of universally licensed DENV vaccines highlights the urgent need to address this public health concern. Action and attention to antibody-dependent enhancement increase the difficulty of vaccine development. With the worsening dengue fever epidemic, Dengvaxia^® (CYD-TDV) and Qdenga^® (TAK-003) have been approved for use in specific populations in affected areas. However, these vaccines do not provide a balanced immune response to all four DENV serotypes and the vaccination cannot cover all populations. There is still a need to develop a safe, broad-spectrum, and effective vaccine to address the increasing number of dengue cases worldwide. This review provides an overview of the existing DENV vaccines, as well as potential candidates for future studies on DENV vaccine development, and discusses the challenges and possible solutions in the field.

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CA-CAS-01-A: A Permissive Cell Line for Isolation and Live Attenuated Vaccine Development against African Swine Fever Virus: Seung-Chul Lee , Yongkwan Kim , Ji-Won Cha , Kiramage Chathuranga , Niranjan Dodantenna , Hyeok-Il Kwon , Min Ho Kim , Weonhwa Jheong , In-Joong Yoon , Joo Young Lee , Sung-Sik Yoo , Jong-Soo Lee; J. Microbiol. 2024;62(2):125-134. Published online March 13, 2024; DOI: https://doi.org/10.1007/s12275-024-00116-1

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African swine fever virus (ASFV) is the causative agent of the highly lethal African swine fever disease that affects domestic pigs and wild boars. In spite of the rapid spread of the virus worldwide, there is no licensed vaccine available. The lack of a suitable cell line for ASFV propagation hinders the development of a safe and effective vaccine. For ASFV propagation, primary swine macrophages and monocytes have been widely studied. However, obtaining these cells can be time-consuming and expensive, making them unsuitable for mass vaccine production. The goal of this study was to validate the suitability of novel CA-CAS-01-A (CAS-01) cells, which was identified as a highly permissive cell clone for ASFV replication in the MA-104 parental cell line for live attenuated vaccine development. Through a screening experiment, maximum ASFV replication was observed in the CAS-01 cell compared to other sub-clones of MA-104 with 14.89 and log10 7.5 ± 0.15 Ct value and TCID50/ ml value respectively. When CAS-01 cells are inoculated with ASFV, replication of ASFV was confirmed by Ct value for ASFV DNA, HAD50/ ml assay, TCID50/ ml assay, and cytopathic effects and hemadsoption were observed similar to those in primary porcine alveolar macrophages after 5th passage. Additionally, we demonstrated stable replication and adaptation of ASFV over the serial passage. These results suggest that CAS-01 cells will be a valuable and promising cell line for ASFV isolation, replication, and development of live attenuated vaccines.

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miR-135b Aggravates Fusobacterium nucleatum-Induced Cisplatin Resistance in Colorectal Cancer by Targeting KLF13: Wei Zeng , Jia Pan , Guannan Ye; J. Microbiol. 2024;62(2):63-73. Published online February 24, 2024; DOI: https://doi.org/10.1007/s12275-023-00100-1

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Cisplatin resistance is the main cause of colorectal cancer (CRC) treatment failure, and the cause has been reported to be related to Fusobacterium nucleatum (Fn) infection. In this study, we explored the role of Fn in regulating cisplatin resistance of CRC cells and its underlying mechanism involved. The mRNA and protein expressions were examined by qRT-PCR and western blot. Cell proliferation and cell apoptosis were assessed using CCK8 and flow cytometry assays, respectively. Dual-luciferase reporter gene assay was adopted to analyze the molecular interactions. Herein, our results revealed that Fn abundance and miR-135b expression were markedly elevated in CRC tissues, with a favorable association between the two. Moreover, Fn infection could increase miR-135b expression via a concentration-dependent manner, and it also enhanced cell proliferation but reduced apoptosis and cisplatin sensitivity by upregulating miR-135b. Moreover, KLF13 was proved as a downstream target of miR-135b, of which overexpression greatly diminished the promoting effect of miR-135b or Fn-mediated cisplatin resistance in CRC cells. In addition, it was observed that upstream 2.5 kb fragment of miR-135b promoter could be interacted by β-catenin/TCF4 complex, which was proved as an effector signaling of Fn. LF3, a blocker of β-catenin/TCF4 complex, was confirmed to diminish the promoting role of Fn on miR-135b expression. Thus, it could be concluded that Fn activated miR-135b expression through TCF4/β-catenin complex, thereby inhibiting KLF13 expression and promoting cisplatin resistance in CRC.

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Quorum Quenching Potential of Reyranella sp. Isolated from Riverside Soil and Description of Reyranella humidisoli sp. nov.: Dong Hyeon Lee, Seung Bum Kim; J. Microbiol. 2024;62(6):449-461. Published online May 30, 2024; DOI: https://doi.org/10.1007/s12275-024-00131-2

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Quorum quenching refers to any mechanism that inhibits quorum sensing processes. In this study, quorum quenching activity among bacteria inhabiting riverside soil was screened, and a novel Gram-stain-negative, rod shaped bacterial strain designated MMS21-HV4-11(T), which showed the highest level of quorum quenching activity, was isolated and subjected to further analysis. Strain MMS21-HV4-11(T) could be assigned to the genus Reyranella of Alphaproteobacteria based on the 16S rRNA gene sequence, as the strain shared 98.74% sequence similarity with Reyranella aquatilis seoho-37(T), and then 97.87% and 97.80% sequence similarity with Reyranella soli KIS14-15(T) and Reyranella massiliensis 521(T), respectively. The decomposed N-acyl homoserine lactone was restored at high concentrations under acidic conditions, implying that lactonase and other enzyme(s) are responsible for quorum quenching. The genome analysis indicated that strain MMS21-HV4-11(T) had two candidate genes for lactonase and one for acylase, and expected protein structures were confirmed. In the quorum sensing inhibition assay using a plant pathogen Pectobacterium carotovorum KACC 14888, development of soft rot was significantly inhibited by strain MMS21-HV4-11(T). Besides, the swarming motility by Pseudomonas aeruginosa PA14 was significantly inhibited in the presence of strain MMS21-HV4-11(T). Since the isolate did not display direct antibacterial activity against either of these species, the inhibition was certainly due to quorum quenching activity. In an extended study with the type strains of all known species of Reyranella, all strains were capable of degrading N-acyl homoserine lactones (AHLs), thus showing quorum quenching potential at the genus level. This is the first study on the quorum quenching potential and enzymes responsible in Reyranella. In addition, MMS21-HV4-11(T) could be recognized as a new species through taxonomic characterization, for which the name Reyranella humidisoli sp. nov. is proposed (type strain = MMS21-HV4-11( T) = KCTC 82780( T) = LMG 32365(T)).

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The Microbiome Matters: Its Impact on Cancer Development and Therapeutic Responses: In‑Young Chung, Jihyun Kim, Ara Koh; J. Microbiol. 2024;62(3):137-152. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00110-7

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In the evolving landscape of cancer research, the human microbiome emerges as a pivotal determinant reshaping our understanding of tumorigenesis and therapeutic responses. Advanced sequencing technologies have uncovered a vibrant microbial community not confned to the gut but thriving within tumor tissues. Comprising bacteria, viruses, and fungi, this diverse microbiota displays distinct signatures across various cancers, with most research primarily focusing on bacteria. The correlations between specifc microbial taxa within diferent cancer types underscore their pivotal roles in driving tumorigenesis and infuencing therapeutic responses, particularly in chemotherapy and immunotherapy. This review amalgamates recent discoveries, emphasizing the translocation of the oral microbiome to the gut as a potential marker for microbiome dysbiosis across diverse cancer types and delves into potential mechanisms contributing to cancer promotion. Furthermore, it highlights the adverse efects of the microbiome on cancer development while exploring its potential in fortifying strategies for cancer prevention and treatment.

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Application of Microbiome‑Based Therapies in Chronic Respiratory Diseases: Se Hee Lee, Jang Ho Lee, Sei Won Lee; J. Microbiol. 2024;62(3):201-216. Published online April 18, 2024; DOI: https://doi.org/10.1007/s12275-024-00124-1

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The application of microbiome-based therapies in various areas of human disease has recently increased. In chronic respiratory disease, microbiome-based clinical applications are considered compelling options due to the limitations of current treatments. The lung microbiome is ecologically dynamic and afected by various conditions, and dysbiosis is associated with disease severity, exacerbation, and phenotype as well as with chronic respiratory disease endotype. However, it is not easy to directly modulate the lung microbiome. Additionally, studies have shown that chronic respiratory diseases can be improved by modulating gut microbiome and administrating metabolites. Although the composition, diversity, and abundance of the microbiome between the gut and lung are considerably diferent, modulation of the gut microbiome could improve lung dysbiosis. The gut microbiome infuences that of the lung via bacterial-derived components and metabolic degradation products, including short-chain fatty acids. This phenomenon might be associated with the cross-talk between the gut microbiome and lung, called gut-lung axis. There are multiple alternatives to modulate the gut microbiome, such as prebiotics, probiotics, and postbiotics ingestion and fecal material transplantation. Several studies have shown that high-fber diets, for example, present benefcial efects through the production of short-chain fatty acids. Additionally, genetically modifed probiotics to secrete some benefcial molecules might also be utilized to treat chronic respiratory diseases. Further studies on microbial modulation to regulate immunity and potentiate conventional pharmacotherapy will improve microbiome modulation techniques, which will develop as a new therapeutic area in chronic respiratory diseases.

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Journal Article

Exploring the Therapeutic Potential of Scorpion-Derived Css54 Peptide against Candida albicans: Jonggwan Park , Hyeongsun Kim , Da Dam Kang , Yoonkyung Park; J. Microbiol. 2024;62(2):101-112. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00113-4

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Candida albicans (C. albicans) is one of the most common opportunistic fungi worldwide, which is associated with a high mortality rate. Despite treatment, C. albicans remains the leading cause of life-threatening invasive infections. Consequently, antimicrobial peptides (AMPs) are potential alternatives as antifungal agents with excellent antifungal activity. We previously reported that Css54, found in the venom of Centrurodies suffusus suffusus (C. s. suffusus) showed antibacterial activity against zoonotic bacteria. However, the antifungal activity of Css54 has not yet been elucidated. The obj!ective of this study was to identify the antifungal activity of Css54 against C. albicans and analyze its mechanism. Css54 showed high antifungal activity against C. albicans. Css54 also inhibited biofilm formation in fluconazole-resistant fungi. The antifungal mechanism of action of Css54 was investigated using membrane-related assays, including the membrane depolarization assay and analysis of the membrane integrity of C. albicans after treatment with Css54. Css54 induced reactive oxygen species (ROS) production in C. albicans, which affected its antifungal activity. Our results indicate that Css54 causes membrane damage in C. albicans, highlighting its value as a potential therapeutic agent against C. albicans infection.

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Full article

Phycobium rhodophyticola gen. nov., sp. nov. and Aliiphycobium algicola gen. nov., sp. nov., isolated from the phycosphere of marine red algae: Jeong Min Kim, Woonhee Baek, Byeong Jun Choi, Hülya Bayburt, Jae Kyeong Lee, Sung Chul Lee, Che Ok Jeon; J. Microbiol. 2025;63(6):e2503014. Published online June 30, 2025; DOI: https://doi.org/10.71150/jm.2503014

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Two Gram-stain-negative, strictly aerobic, non-motile, rod-shaped bacteria, designated D3-12ᵀ and G2-2ᵀ, were isolated from the phycosphere of marine red algae. Both strains exhibited catalase- and oxidase-positive activities. Strain D3-12ᵀ grew optimally at 30°C, pH 7.0, and 2.0–3.0% (w/v) NaCl, while strain G2-2ᵀ showed optimal growth at 30°C, pH 7.0, and 2.0% NaCl. Ubiquinone-10 was the sole respiratory quinone in both strains. The major fatty acids (> 5%) in strain D3-12ᵀ were feature 8 (C_18:1 ω7c and/or C_18:1 ω6c), 11-methyl-C_18:1 ω7c, and C_16:0, while strain G2-2ᵀ contained summed feature 8 and C_16:0. The predominant polar lipids in strain D3-12ᵀ were phosphatidylcholine, phosphatidylglycerol, and phosphatidylethanolamine, whereas strain G2-2ᵀ contained phosphatidylglycerol and diphosphatidylglycerol. The genomic DNA G + C content was 59.9% for strain D3-12ᵀ and 60.2% for strain G2-2ᵀ. Phylogenetic analyses based on 16S rRNA and whole-genome sequences placed both strains into distinct lineages within the family Roseobacteraceae, separate from previously described genera. Genome-based relatedness metrics, including average nucleotide identity, digital DNA-DNA hybridization, average amino acid identity, and percentage of conserved proteins, further confirmed that these strains represent novel genera. Based on phenotypic, chemotaxonomic, and molecular characteristics, strains D3-12ᵀ and G2-2ᵀ are proposed as novel genera: Phycobium rhodophyticola gen. nov., sp. nov. (D3-12ᵀ = KACC 22712ᵀ = JCM 35528ᵀ) and Aliiphycobium algicola gen. nov., sp. nov. (G2-2ᵀ = KACC 22602ᵀ = JCM 35752ᵀ). Additionally, metabolic features relevant to interactions with marine algae, including genes associated with carbohydrate-active enzymes, vitamin biosynthesis, phenylacetic acid production, and bacterioferritin synthesis, were bioinformatically investigated.

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Ningiella algicola sp. nov. and Marinicella algicola sp. nov., proposal of Paralteromonas gen. Nov. and Neoalteromonas gen. Nov. with reclassification of Alteromonas species, and reclassification of Methylophaga aminisulfidivorans as a later heterotypic s
Hülya Bayburt, Jeong Min Kim, Byeong Jun Choi, Jae Kyeong Lee, Che Ok Jeon
Systematic and Applied Microbiology.2026; 49(1): 126685. CrossRef
Mucilaginibacter aureus sp. nov. and Mucilaginibacter sediminis sp. nov., isolated from wetland soil
Chae Yeong Moon, Jae Kyeong Lee, Dong Min Han, Dae Seung Lee, Byeong Jun Choi, Ju Hye Baek, Che Ok Jeon
International Journal of Systematic and Evolutionary Microbiology .2026;[Epub] CrossRef
Aquimarina rhodophyticola sp. nov. and Aquimarina besae sp. nov., Isolated from Marine Red Algae
Jeong Min Kim, Byeong Jun Choi, Hülya Bayburt, Dong Min Han, Che Ok Jeon
Current Microbiology.2025;[Epub] CrossRef
Carotenoid-Producing Qipengyuania algicola sp. nov. and Qipengyuania rhodophyticola sp. nov., Isolated from Marine Algae, and Emended Description of the Genus Qipengyuania Xu et al. 2020
Jae Kyeong Lee, Min Woo Lee, Chae Yeong Moon, Jeong Min Kim, Hülya Bayburt, Byeong Jun Choi, Che Ok Jeon
Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef
Flagellimonas ulvae sp. nov. and Flagellimonas rhodophyticola sp. nov., isolated from marine algae
Hui Seong Won, Dong Min Han, Jeong Min Kim, Hülya Bayburt, Byeong Jun Choi, Zhe-Xue Quan, Che Ok Jeon
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef
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International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef

Review

Recent advances in the Design-Build-Test-Learn (DBTL) cycle for systems metabolic engineering of Corynebacterium glutamicum: Subeen Jeon, Yu Jung Sohn, Haeyoung Lee, Ji Young Park, Dojin Kim, Eun Seo Lee, Si Jae Park; J. Microbiol. 2025;63(3):e2501021. Published online March 28, 2025; DOI: https://doi.org/10.71150/jm.2501021

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Abstract PDF

Existing microbial engineering strategies—encompassing metabolic engineering, systems biology, and systems metabolic engineering—have significantly enhanced the potential of microbial cell factories as sustainable alternatives to the petrochemical industry by optimizing metabolic pathways. Recently, systems metabolic engineering, which integrates tools from synthetic biology, enzyme engineering, omics technology, and evolutionary engineering, has been successfully developed. By leveraging modern engineering strategies within the Design-Build-Test-Learn (DBTL) cycle framework, these advancements have revolutionized the biosynthesis of valuable compounds. This review highlights recent progress in the metabolic engineering of Corynebacterium glutamicum, a versatile microbial platform, achieved through various approaches from traditional metabolic engineering to advanced systems metabolic engineering, all within the DBTL cycle. A particular focus is placed C5 platform chemicals derived from L-lysine, one of the key amino acid production pathways of C. glutamicum. The development of DBTL cycle-based metabolic engineering strategies for this process is discussed.

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Minireview

Advances in functional analysis of the microbiome: Integrating metabolic modeling, metabolite prediction, and pathway inference with Next-Generation Sequencing data: Sungwon Jung; J. Microbiol. 2025;63(1):e.2411006. Published online January 24, 2025; DOI: https://doi.org/10.71150/jm.2411006

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This review explores current advancements in microbiome functional analysis enabled by next-generation sequencing technologies, which have transformed our understanding of microbial communities from mere taxonomic composition to their functional potential. We examine approaches that move beyond species identification to characterize microbial activities, interactions, and their roles in host health and disease. Genome-scale metabolic models allow for in-depth simulations of metabolic networks, enabling researchers to predict microbial metabolism, growth, and interspecies interactions in diverse environments. Additionally, computational methods for predicting metabolite profiles offer indirect insights into microbial metabolic outputs, which is crucial for identifying biomarkers and potential therapeutic targets. Functional pathway analysis tools further reveal microbial contributions to metabolic pathways, highlighting alterations in response to environmental changes and disease states. Together, these methods offer a powerful framework for understanding the complex metabolic interactions within microbial communities and their impact on host physiology. While significant progress has been made, challenges remain in the accuracy of predictive models and the completeness of reference databases, which limit the applicability of these methods in under-characterized ecosystems. The integration of these computational tools with multi-omic data holds promise for personalized approaches in precision medicine, allowing for targeted interventions that modulate the microbiome to improve health outcomes. This review highlights recent advances in microbiome functional analysis, providing a roadmap for future research and translational applications in human health and environmental microbiology.

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Huan Zhang, Bing Jun Yang Lee, Tong Wang, Xuesong Xiang, Yafang Tan, Yanping Han, Yujing Bi, Fachao Zhi, Xin Wang, Fang He, Seppo J. Salminen, Baoli Zhu, Ruifu Yang
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Cherelle Atallah, Ayline El Abiad, Marita El Abiad, Mantoura Nakad, Jean Claude Assaf
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Computational Metagenomics: State of the Art
Marco Antonio Pita-Galeana, Martin Ruhle, Lucía López-Vázquez, Guillermo de Anda-Jáuregui, Enrique Hernández-Lemus
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Kulmani Mehar, Kamakshi Priya K, Amit Prakash Sen, Ravi Kumar Paliwal, Bhavan Kumar M., Aravindan Munusamy Kalidhas, Tapas Kumar Mohapatra, Aseel Samrat, Ravikumar Jayabal
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Journal Article

Lactobacillus gasseri BNR17 and Limosilactobacillus fermentum ABF21069 Ameliorate High Sucrose-Induced Obesity and Fatty Liver via Exopolysaccharide Production and β-oxidation: Yu Mi Jo, Yoon Ji Son, Seul-Ah Kim, Gyu Min Lee, Chang Won Ahn, Han-Oh Park, Ji-Hyun Yun; J. Microbiol. 2024;62(10):907-918. Published online October 17, 2024; DOI: https://doi.org/10.1007/s12275-024-00173-6

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Obesity and metabolic dysfunction-associated fatty liver disease (MAFLD) are prevalent metabolic disorders with substantial global health implications that are often inadequately addressed by current treatments and may have side effects. Probiotics have emerged as promising therapeutic agents owing to their beneficial effects on gut health and metabolism. This study investigated the synergistic effects of a probiotic combination of BNR17 and ABF21069 on obesity and MAFLD in C57BL/6 mice fed a high-sucrose diet. The probiotic combination significantly reduced body weight and fat accumulation compared with the high-sucrose diet. It also alleviated elevated serum leptin levels induced by a high-sucrose diet. Histological analysis revealed a significant reduction in white adipose tissue and fatty liver in the mice treated with the probiotic combination. Furthermore, increased expression of genes related to β-oxidation, thermogenesis, and lipolysis suggested enhanced metabolic activity. The probiotic groups, particularly the BNR17 group, showed an increase in fecal exopolysaccharides, along with a tendency toward a lower expression of intestinal sugar transport genes, indicating reduced sugar absorption. Additionally, inflammatory markers in the liver tissue exhibited lower expression in the ABF21069 group than in the HSD group. Despite each strain in the combination group having distinct characteristics and functions, their combined effect demonstrated synergy in mitigating obesity and MAFLD, likely through the modulation of fecal exopolysaccharides content and improvement in lipid metabolism. These findings underscore the potential of probiotic supplementation as a promising assistant therapy for managing obesity and MAFLD and provide valuable insights into its therapeutic mechanisms in metabolic disorders.

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Tsukasa Shiraishi, Ryosuke Kutomi, Yamaha Sato, Akihito Endo, Satoru Fukiya, Satoshi Takahashi, Atsushi Yokota, Shin-ichi Yokota
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Review

Reverse Zoonotic Transmission of SARS-CoV-2 and Monkeypox Virus: A Comprehensive Review: Chiranjib Chakraborty, Manojit Bhattacharya, Md Aminul Islam, Hatem Zayed, Elijah Ige Ohimain, Sang-Soo Lee, Prosun Bhattacharya, Kuldeep Dhama; J. Microbiol. 2024;62(5):337-354. Published online May 23, 2024; DOI: https://doi.org/10.1007/s12275-024-00138-9

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Reverse zoonosis reveals the process of transmission of a pathogen through the human-animal interface and the spillback of the zoonotic pathogen. In this article, we methodically demonstrate various aspects of reverse zoonosis, with a comprehensive discussion of SARS-CoV-2 and MPXV reverse zoonosis. First, different components of reverse zoonosis, such as humans, different pathogens, and numerous animals (poultry, livestock, pets, wild animals, and zoo animals), have been demonstrated. Second, it explains the present status of reverse zoonosis with different pathogens during previous occurrences of various outbreaks, epidemics, and pandemics. Here, we present 25 examples from literature. Third, using several examples, we comprehensively illustrate the present status of the reverse zoonosis of SARS-CoV-2 and MPXV. Here, we have provided 17 examples of SARS-CoV-2 reverse zoonosis and two examples of MPXV reverse zoonosis. Fourth, we have described two significant aspects of reverse zoonosis: understanding the fundamental aspects of spillback and awareness. These two aspects are required to prevent reverse zoonosis from the current infection with two significant viruses. Finally, the One Health approach was discussed vividly, where we urge scientists from different areas to work collaboratively to solve the issue of reverse zoonosis.

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Efficient and modular reverse genetics system for rapid generation of recombinant severe acute respiratory syndrome coronavirus 2
Sojung Bae, Jinjong Myoung
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Full article

FunVIP: Fungal Validation and Identification Pipeline based on phylogenetic analysis: Chang Wan Seo, Shinnam Yoo, Yoonhee Cho, Ji Seon Kim, Martin Steinegger, Young Woon Lim; J. Microbiol. 2025;63(4):e2411017. Published online April 29, 2025; DOI: https://doi.org/10.71150/jm.2411017

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The increase of sequence data in public nucleotide databases has made DNA sequence-based identification an indispensable tool for fungal identification. However, the large proportion of mislabeled sequence data in public databases leads to frequent misidentifications. Inaccurate identification is causing severe problems, especially for industrial and clinical fungi, and edible mushrooms. Existing species identification pipelines require separate validation of a dataset obtained from public databases containing mislabeled taxonomic identifications. To address this issue, we developed FunVIP, a fully automated phylogeny-based fungal validation and identification pipeline (https://github.com/Changwanseo/FunVIP). FunVIP employs phylogeny-based identification with validation, where the result is achievable only with a query, database, and a single command. FunVIP command comprises nine steps within a workflow: input management, sequence-set organization, alignment, trimming, concatenation, model selection, tree inference, tree interpretation, and report generation. Users may acquire identification results, phylogenetic tree evidence, and reports of conflicts and issues detected in multiple checkpoints during the analysis. The conflicting sample validation performance of FunVIP was demonstrated by re-iterating the manual revision of a fungal genus with a database with mislabeled sequences, Fuscoporia. We also compared the identification performance of FunVIP with BLAST and q2-feature-classifier with two mass double-revised fungal datasets, Sanghuangporus and Aspergillus section Terrei. Therefore, with its automatic validation ability and high identification performance, FunVIP proves to be a highly promising tool for achieving easy and accurate fungal identification.

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Hidden diversity of crust-like Sebacinaceae (Sebacinales, Agaricomycetes) in Asia
Hannah Suh, Chang Wan Seo, Ki Hyeong Park, Shinnam Yoo, Dohye Kim, Yoonhee Cho, Young Woon Lim
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Hannah Suh, Abel Severin Lupala, Hae Jin Cho, Sumin Jo, Jiyun Choi, Young Woon Lim
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Wonjun Lee, Sumin Jo, Soo Hyun Maeng, Ji Seon Kim, Myung Kyum Kim, Young Woon Lim
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Research Article

Korean Red ginseng enhances ZBP1-mediated cell death to suppress viral protein expression in host defense against Influenza A virus: Jueun Oh, Hayeon Kim, Jihye Lee, Suhyun Kim, Seyun Shin, Young-Eui Kim, Sehee Park, SangJoon Lee; J. Microbiol. 2025;63(1):e.2409007. Published online January 24, 2025; DOI: https://doi.org/10.71150/jm.2409007

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Korean Red ginseng has emerged as a potent candidate in the fight against various viral infections, demonstrating significant efficacy both in vitro and in vivo, particularly against influenza A viruses. Despite substantial evidence of its antiviral properties, the detailed molecular mechanisms through which it reduces viral lethality remain insufficiently understood. Our investigations have highlighted the superior effectiveness of Korean Red ginseng against influenza viruses, outperforming its effects on numerous other viral strains. We aim to uncover the specific mechanisms by which Korean Red ginseng exerts its antiviral effects, focusing on influenza A viruses. Our prior studies have identified the role of Z-DNA-binding protein 1 (ZBP1), a signaling complex involved in inducing programmed cell death in response to influenza virus infection. Given the critical role of ZBP1 as a sensor for viral nucleic acid, we hypothesize that Korean Red ginseng may modulate the ZBP1-derived cell death pathway. This interaction is anticipated to enhance cell death while concurrently suppressing viral protein expression, offering novel insights into the antiviral mechanism of Korean Red ginseng against influenza A viruses.

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Pattern recognition receptors and inflammasome: Now and beyond
SuHyeon Oh, Young Ki Choi, SangJoon Lee
Molecules and Cells.2025; 48(8): 100239. CrossRef
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Seyun Shin, Young Ki Choi, SangJoon Lee
Journal of Microbiology.2025; 63(6): e2503009. CrossRef
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Yonghang Run, Mahmoud Tavakoli, Yuxuan Zhang, Karen M. Vasquez, Wenli Zhang
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Václav Brázda, Richard P. Bowater, Petr Pečinka, Martin Bartas, Vinayaka R. Prasad
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AIM2 drives inflammatory cell death and monkeypox pathogenesis
Jueun Oh, Yun-Ho Hwang, Jihye Lee, Cheong Seok, SuHyeon Oh, Hye Yoon Kim, Nabukenya Mariam, Jaeyoung Ahn, GyeongJu Yu, Jaewoo Park, Hayeon Kim, Suhyun Kim, Seyun Shin, Min-Chul Jung, Jinwoo Gil, Joo Sang Lee, Young Ki Choi, Dokeun Kim, Daesik Kim, You-Jin
Cellular & Molecular Immunology.2025; 22(12): 1615. CrossRef

Review

Microbiome-Mucosal Immunity Nexus: Driving Forces in Respiratory Disease Progression: Young Chae Park, Soo Yeon Choi, Yunah Cha, Hyeong Won Yoon, Young Min Son; J. Microbiol. 2024;62(9):709-725. Published online September 6, 2024; DOI: https://doi.org/10.1007/s12275-024-00167-4

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The importance of the complex interplay between the microbiome and mucosal immunity, particularly within the respiratory tract, has gained significant attention due to its potential implications for the severity and progression of lung diseases. Therefore, this review summarizes the specific interactions through which the respiratory tract-specific microbiome influences mucosal immunity and ultimately impacts respiratory health. Furthermore, we discuss how the microbiome affects mucosal immunity, considering tissue-specific variations, and its capacity in respiratory diseases containing asthma, chronic obstructive pulmonary disease, and lung cancer. Additionally, we investigate the external factors which affect the relationship between respiratory microbiome and mucosal immune responses. By exploring these intricate interactions, this review provides valuable insights into the potential for microbiome-based interventions to modulate mucosal immunity and alleviate the severity of respiratory diseases.

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Yutao Ge, Guo Tang, Yawen Fu, Peng Deng, Rong Yao
European Journal of Medical Research.2025;[Epub] CrossRef
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Meng’en Liao, Jianpeng Cai, Feng Zhu, Yuanbo Lan, Tianqi Xu, Jingxin Guo, Quanlin Xue, Yilong Wen, Fan Zou, Yu Zhang, Shiliang Zhang, Yan Yan, Jingwen Ai, Jie Cui, Wenhong Zhang
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Journal Article

Congregibacter variabilis sp. nov. and Congregibacter brevis sp. nov. within the OM60/NOR5 Clade, Isolated from Seawater, and Emended Description of the Genus Congregibacter: Hyeonsu Tak, Miri S Park, Hyerim Cho, Yeonjung Lim, Jang-Cheon Cho; J. Microbiol. 2024;62(9):739-748. Published online July 18, 2024; DOI: https://doi.org/10.1007/s12275-024-00158-5

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Two Gram-stain-negative, aerobic, motile by means of flagella, short rod-shaped bacterial strains, designated IMCC43200(T) and IMCC45268(T), were isolated from coastal seawater samples collected from the South Sea of Korea. Strains IMCC43200(T) and IMCC45268(T) shared 98.6% 16S rRNA gene sequence similarity and were closely related to Congregibacter litoralis KT71(T) (98.8% and 98.7%, respectively). Complete whole-genome sequences of IMCC43200(T) and IMCC45268(T) were 3.93 and 3.86 Mb in size with DNA G + C contents of 54.8% and 54.2%, respectively. Average nucleotide identity (ANI) and digital DNA-DNA hybridization (dDDH) values between the two strains were 74.5% and 23.4%, respectively, revealing that they are independent species. The two strains showed ANI values of ≤ 75.8% and dDDH values of ≤ 23.0% to the type and only species of the genus Congregibacter (C. litoralis), indicating that each strain represents a novel species. Both strains contained summed feature 3 (comprising C(16:1) ω6c and/or C(16:1) ω7c) and summed feature 8 (comprising C(18:1) ω6c and/or C(18:1) ω7c) as major fatty acid constituents. The predominant isoprenoid quinone detected in both strains was ubiquinone-8 (Q-8). The major polar lipids of the two strains were phosphatidylethanolamine, phosphatidylglycerol, phospholipids, and aminolipids. Based on the phylogenetic, genomic, and phenotypic characterization, strains IMCC43200(T) and IMCC45268(T) were considered to represent two novel species within the genus Congregibacter, for which the names Congregibacter variabilis sp. nov. and Congregibacter brevis sp. nov. are proposed with IMCC43200(T) (= KCTC 8133(T) = NBRC 116295(T) = CCTCC AB 2023139(T)) and IMCC45268(T) (= KCTC 92921(T) = NBRC 116135(T)) as the type strains, respectively.

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Validation List no. 223. Valid publication of new names and new combinations effectively published outside the IJSEM
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Jeong Min Kim, Woonhee Baek, Byeong Jun Choi, Hülya Bayburt, Jae Kyeong Lee, Sung Chul Lee, Che Ok Jeon
Journal of Microbiology.2025; 63(6): e2503014. CrossRef
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Review

Structural Insights into the Lipopolysaccharide Transport (Lpt) System as a Novel Antibiotic Target: Yurim Yoon, Saemee Song; J. Microbiol. 2024;62(4):261-275. Published online May 31, 2024; DOI: https://doi.org/10.1007/s12275-024-00137-w

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Lipopolysaccharide (LPS) is a critical component of the extracellular leaflet within the bacterial outer membrane, forming an effective physical barrier against environmental threats in Gram-negative bacteria. After LPS is synthesized and matured in the bacterial cytoplasm and the inner membrane (IM), LPS is inserted into the outer membrane (OM) through the ATP-driven LPS transport (Lpt) pathway, which is an energy-intensive process. A trans-envelope complex that contains seven Lpt proteins (LptA-LptG) is crucial for extracting LPS from the IM and transporting it across the periplasm to the OM. The last step in LPS transport involves the mediation of the LptDE complex, facilitating the insertion of LPS into the outer leaflet of the OM. As the Lpt system plays an essential role in maintaining the impermeability of the OM via LPS decoration, the interactions between these interconnected subunits, which are meticulously regulated, may be potential targets for the development of new antibiotics to combat multidrug-resistant Gram-negative bacteria. In this review, we aimed to provide an overview of current research concerning the structural interactions within the Lpt system and their implications to clarify the function and regulation of LPS transport in the overall process of OM biogenesis. Additionally, we explored studies on the development of therapeutic inhibitors of LPS transport, the factors that limit success, and future prospects.

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Veronika Zdarska, Gabriele Arcari, Milan Kolar, Patrik Mlynarcik
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Dongyang Fan, Meng Li, Zipeng Shen, Ying Li, Jingjing Guo, Dong Wang, Ting Han, Ben Zhong Tang
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Genetically Engineered CLDN18.2 CAR-T Cells Expressing Synthetic PD1/CD28 Fusion Receptors Produced Using a Lentiviral Vector: Heon Ju Lee, Seo Jin Hwang, Eun Hee Jeong, Mi Hee Chang; J. Microbiol. 2024;62(7):555-568. Published online May 3, 2024; DOI: https://doi.org/10.1007/s12275-024-00133-0

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This study aimed to develop synthetic Claudin18.2 (CLDN18.2) chimeric antigen receptor (CAR)-T (CAR-T) cells as a treatment for advanced gastric cancer using lentiviral vector genetic engineering technology that targets the CLDN18.2 antigen and simultaneously overcomes the immunosuppressive environment caused by programmed cell death protein 1 (PD-1). Synthetic CAR T cells are a promising approach in cancer immunotherapy but face many challenges in solid tumors. One of the major problems is immunosuppression caused by PD-1. CLDN18.2, a gastric-specific membrane protein, is considered a potential therapeutic target for gastric and other cancers. In our study, CLDN18.2 CAR was a second-generation CAR with inducible T-cell costimulatory (CD278), and CLDN18.2-PD1/CD28 CAR was a third-generation CAR, wherein the synthetic PD1/CD28 chimeric-switch receptor (CSR) was added to the second-generation CAR. In vitro, we detected the secretion levels of different cytokines and the killing ability of CAR-T cells. We found that the secretion of cytokines such as interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α) secreted by three types of CAR-T cells was increased, and the killing ability against CLDN18.2-positive GC cells was enhanced. In vivo, we established a xenograft GC model and observed the antitumor effects and off-target toxicity of CAR-T cells. These results support that synthetic anti-CLDN18.2 CAR-T cells have antitumor effect and anti-CLDN18.2-PD1/CD28 CAR could provide a promising design strategy to improve the efficacy of CAR-T cells in advanced gastric cancer.

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Zihe Guan, Lichao Han, Baojiang Chen, Yijia Ma, Qianyue Ni, Zijian Wang, Jingyu Yang, Zheng Liu
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Biomedicine & Pharmacotherapy.2025; 193: 118863. CrossRef

Vaccine Development for Severe Fever with Thrombocytopenia Syndrome Virus in Dogs: Seok-Chan Park, Da-Eun Jeong, Sun-Woo Han, Joon-Seok Chae, Joo-Yong Lee, Hyun-Sook Kim, Bumseok Kim, Jun-Gu Kang; J. Microbiol. 2024;62(4):327-335. Published online April 18, 2024; DOI: https://doi.org/10.1007/s12275-024-00119-y

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Severe fever with thrombocytopenia syndrome (SFTS) is a life-threatening viral zoonosis. The causative agent of this disease is the Dabie bandavirus, which is usually known as the SFTS virus (SFTSV). Although the role of vertebrates in SFTSV transmission to humans remains uncertain, some reports have suggested that dogs could potentially transmit SFTSV to humans. Consequently, preventive measures against SFTSV in dogs are urgently needed. In the present study, dogs were immunized three times at two-week intervals with formaldehyde-inactivated SFTSV with two types of adjuvants. SFTSV (KCD46) was injected into all dogs two weeks after the final immunization. Control dogs showed viremia from 2 to 4 days post infection (dpi), and displayed white pulp atrophy in the spleen, along with a high level of terminal deoxynucleotidyl transferase-mediated dUTP nick-end labelling assay (TUNEL) positive area. However, the inactivated SFTSV vaccine groups exhibited rare pathological changes and significantly reduced TUNEL positive areas in the spleen. Furthermore, SFTSV viral loads were not detected at any of the tested dpi. Our results indicate that both adjuvants can be safely used in combination with an inactivated SFTSV formulation to induce strong neutralizing antibodies. Inactivated SFTSV vaccines effectively prevent pathogenicity and viremia in dogs infected with SFTSV. In conclusion, our study highlighted the potential of inactivated SFTSV vaccination for SFTSV control in dogs.

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Clinical characteristics of two companion canines with severe fever with thrombocytopenia syndrome virus (Bandavirus dabieense) in Seoul, Republic of Korea
Hye-Ryung Byun, Seong-Ryeong Ji, Jeong-Yeon Hwang, So-Yoon Lee, Joon-Seok Chae
Veterinary Research Communications.2026;[Epub] CrossRef
The immunogenicity and protection efficacy evaluation of mRNA vaccine candidate for severe fever with thrombocytopenia syndrome in mice
Da-Eun Jeong, Jack Yoon, Baek Kim, Jun-Gu Kang, Abdallah M. Samy
PLOS Neglected Tropical Diseases.2025; 19(4): e0012999. CrossRef
Efficient and modular reverse genetics system for rapid generation of recombinant severe acute respiratory syndrome coronavirus 2
Sojung Bae, Jinjong Myoung
Journal of Microbiology.2025; 63(7): e2504015. CrossRef
Current status of severe fever with thrombocytopenia syndrome in China (Review)
Hao Sun, Quanman Hu, Saiwei Lu, Yanyan Yang, Li Zhang, Jinzhao Long, Yuefei Jin, Haiyan Yang, Shuaiyin Chen, Guangcai Duan
International Journal of Molecular Medicine.2025; 56(5): 1. CrossRef
Domain-Specific Impacts of Spike Protein Mutations on Infectivity and Antibody Escape in SARS-CoV-2 Omicron BA.1
Tae-Hun Kim, Sojung Bae, Jinjong Myoung
Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef

Flavivirga spongiicola sp. nov. and Flavivirga abyssicola sp. nov., Isolated from Marine Environments: Sung-Hyun Yang , Mi-Jeong Park , Hyun-Myung Oh , Yeong-Jun Park , Kae Kyoung Kwon; J. Microbiol. 2024;62(1):11-19. Published online February 6, 2024; DOI: https://doi.org/10.1007/s12275-023-00102-z

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Two novel Gram-stain-negative, strictly-aerobic, rod-shaped (1.2 ± 3.4 μm × 0.3 ± 0.7 μm), and non-motile marine bacterial species, designated MEBiC05379T and MEBiC07777T, were isolated from a marine sponge Pseudaxinella sp. in Gangneung City and deep-sea sediments of the Ulleung basin in the East Sea of Korea, respectively. The 16S rRNA gene sequence analysis revealed high levels of similarities between these strains and members of the genus Flavivirga (97.0–98.4% sequence identities). Both novel strains revealed as mesophilic, neutrophilic in pH and slightly halophilic. Similar to those of other Flavivirga members, the primary cellular fatty acids of both strains were iso-C15:0, iso-C15:1 G, iso-C15:03-OH, and iso-C17:0 3-OH, with MEBiC05379T and MEBiC07777T containing relatively higher proportions of C12: 0 and summed feature 3 ( C16:1ω7c and/or C16: 1ω6c). In both taxa, the major isoprenoid quinone was MK-6. The DNA G + C contents of MEBiC05379T and MEBiC07777T genomes were 32.62 and 32.46 mol%, respectively. Compared to other members of Flavivirga, both strains exhibited similar DNA G + C ratio and fatty acids pattern, yet enzyme expression and carbon sources utilization pattern were different. Genomes of the genus Flavivirga showed enzyme preferences to fucoidan and sulfated galactans. Considering the monophyly rule, AAI values delineate the genus Flavivirga from adjacent genera calculated to be 76.0–78.7%. Based on the phenotypic, genomic and biochemical data, strains for MEBiC05379T and MEBiC07777T thus represent two novel species in the genus Flavivirga, for which the names Flavivirga spongiicola sp. nov. ( MEBiC05379T [= KCTC 92527 T = JCM 16662 T]), and Flavivirga abyssicola sp. nov. ( MEBiC07777T [= KCTC 92563 T = JCM 36477 T]) are proposed.

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Phycobium rhodophyticola gen. nov., sp. nov. and Aliiphycobium algicola gen. nov., sp. nov., isolated from the phycosphere of marine red algae
Jeong Min Kim, Woonhee Baek, Byeong Jun Choi, Hülya Bayburt, Jae Kyeong Lee, Sung Chul Lee, Che Ok Jeon
Journal of Microbiology.2025; 63(6): e2503014. CrossRef
Rubrivirga aquatilis sp. nov. and Rubrivirga halophila sp. nov., isolated from Korean coastal surface seawater
Jisoo Han, Yeonjung Lim, Mirae Kim, Jang-Cheon Cho
Journal of Microbiology.2025; 63(8): e2504017. CrossRef
Rhodobacteraceae are Prevalent and Ecologically Crucial Bacterial Members in Marine Biofloc Aquaculture
Meora Rajeev, Jang-Cheon Cho
Journal of Microbiology.2024; 62(11): 985. CrossRef
Validation List no. 220. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
Optimization of Culture Medium for the Production of an Exopolysaccharide (p-CY02) with Cryoprotective Activity by Pseudoalteromonas sp. RosPo-2 from the Antarctic Sea
Pilsung Kang, Sung Jin Kim, Ha Ju Park, Il Chan Kim, Se Jong Han, Joung Han Yim
Journal of Microbiology and Biotechnology.2024; 34(5): 1135. CrossRef

Reviews

Extracellular vesicles of Gram-negative and Gram-positive probiotics: Yangyunqi Wang, Chongxu Duan, Xiaomin Yu; J. Microbiol. 2025;63(7):e2506005. Published online July 31, 2025; DOI: https://doi.org/10.71150/jm.2506005

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Extracellular vesicles derived from probiotics have received considerable attention for their pivotal role in bacterial‒host communication. These nanosized, bilayer-encapsulated vesicles carry diverse bioactive molecules, such as proteins, lipids, nucleic acids, and metabolites. Currently, ample evidence has emerged that probiotic extracellular vesicles may modulate several processes of host physiological hemostasis and offer therapeutic benefits. This review examines the biogenesis, composition, and immunomodulatory functions of probiotic-derived extracellular vesicles in probiotic–host interactions, highlighting the therapeutic potential of probiotic extracellular vesicles in the diagnosis and treatment of conditions such as cancer and inflammatory bowel disease. We further summarize the techniques for the separation and purification of extracellular vesicles, providing a methodological foundation for future research and applications. Although the field of probiotic extracellular vesicle research is still in its infancy, the prospects for their application in the biomedical field are broad, potentially emerging as a novel therapeutic approach.

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Decoding bacterial extracellular vesicles: A review on isolation and characterization techniques
Malatesh S. Devati, Apoorva Jnana, Stephen P. Kidd, Slade O. Jensen, T. G. Satheesh Babu, Dinesh Upadhya, Thokur S. Murali
Archives of Microbiology.2026;[Epub] CrossRef
The supernatant of Lactiplantibacillus plantarum 25 is more effective than extracellular vesicles in alleviating ulcerative colitis and improving intestinal barrier function
Shuang Gong, Xin Li, Qiong Zhang, Rui Wang, Ruixia Zeng, Yibo Zhang
Frontiers in Microbiology.2026;[Epub] CrossRef
Standardizing Bacterial Extracellular Vesicle Purification: A Call for Consensus
Dongsic Choi, Eun-Young Lee
Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef
Advances in Biological Functions and Applications of Feeding Microorganism-derived Extracellular Vesicles
Yuanyuan Zhu, Xiaofang Zhang, Xin Feng, Yanyan Huang, Langhong Wang, Huihua Zhang, Xinan Zeng, Zhonglin Tang, Qien Qi
Probiotics and Antimicrobial Proteins.2025;[Epub] CrossRef

Harnessing organelle engineering to facilitate biofuels and biochemicals production in yeast: Phuong Hoang Nguyen Tran, Taek Soon Lee; J. Microbiol. 2025;63(3):e2501006. Published online March 28, 2025; DOI: https://doi.org/10.71150/jm.2501006

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Microbial biosynthesis using yeast species offers numerous advantages to produce industrially relevant biofuels and biochemicals. Conventional metabolic engineering approaches in yeast focus on biosynthetic pathways in the cytoplasm, but these approaches are disturbed by various undesired factors including metabolic crosstalk, competing pathways and insufficient precursors. Given that eukaryotic cells contain subcellular organelles with distinct physicochemical properties, an emerging strategy to overcome cytosolic pathway engineering bottlenecks is through repurposing these organelles as specialized microbial cell factories for enhanced production of valuable chemicals. Here, we review recent progress and significant outcomes of harnessing organelle engineering for biofuels and biochemicals production in both conventional and non-conventional yeasts. We highlight key engineering strategies for the compartmentalization of biosynthetic pathways within specific organelles such as mitochondria, peroxisomes, and endoplasmic reticulum; involved in engineering of signal peptide, cofactor and energy enhancement, organelle biogenesis and dual subcellular engineering. Finally, we discuss the potential and challenges of organelle engineering for future studies and propose an automated pipeline to fully exploit this approach.

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Peroxisome engineering in yeast: Advances, challenges, and prospects
Cuifang Ye, Xiaoqian Li, Tao Liu, Shiyu Li, Mengyu Zhang, Yao Zhao, Jintao Cheng, Guiling Yang, Peiwu Li
Biotechnology Advances.2026; 86: 108747. CrossRef
Building an expanded bio-based economy through synthetic biology
Andrea M. Garza Elizondo, Ilenne del Valle Kessra, Erica Teixeira Prates, Evan Komp, Elise K. Phillips, Nandhini Ashok, Daniel A. Jacobson, Erin G. Webb, Yannick J. Bomble, William G. Alexander, Joanna Tannous, Chung-Jui Tsai, Wayne A. Parrott, Xiaohan Ya
Biotechnology Advances.2026; 87: 108775. CrossRef
Advancing microbial engineering through synthetic biology
Ki Jun Jeong
Journal of Microbiology.2025; 63(3): e2503100. CrossRef
Metabolic engineering strategies for constructing methylotrophic cell factories
Pei Zhou, Yang Sun, Yinbiao Xu, Yupeng Liu, Hua Li
Systems Microbiology and Biomanufacturing.2025; 5(4): 1371. CrossRef

Research Articles

Dissimilatory nitrate reductions in soil Neobacillus and Bacillus strains under aerobic condition: Seohyun Ahn, Min Cho, Michael J. Sadowsky, Jeonghwan Jang; J. Microbiol. 2025;63(2):e2411019. Published online February 27, 2025; DOI: https://doi.org/10.71150/jm.2411019

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Denitrification and dissimilatory nitrate reduction to ammonium (DNRA) were thought to be carried-out by anaerobic bacteria constrained to anoxic conditions as they use nitrate (NO₃^-) as a terminal electron acceptor instead of molecular O₂. Three soil bacilli, Neobacillus spp. strains PS2-9 and PS3-12 and Bacillus salipaludis PS3-36, were isolated from rice paddy field soil in Korea. The bacterial strains were selected as possible candidates performing aerobic denitrification and DNRA as they were observed to reduce NO₃^- and produce extracellular NH₄⁺ regardless of oxygen presence at the initial screening. Whole genome sequencing revealed that these strains possessed all the denitrification and DNRA functional genes in their genomes, including the nirK, nosZ, nirB, and nrfA genes, which were simultaneously cotranscribed under aerobic condition. The ratio between the assimilatory and dissimilatory NO₃^- reduction pathways depended on the availability of a nitrogen source for cell growth, other than NO₃^-. Based on the phenotypic and transcriptional analyses of the NO₃^- reductions, all three of the facultative anaerobic strains reduced NO₃^- likely in both assimilatory and dissimilatory pathways under both aerobic and anoxic conditions. To our knowledge, this is the first report that describes coexistence of NO₃^- assimilation, denitrification, and DNRA in a Bacillus or Neobacillus strain under aerobic condition. These strains may play a pivotal role in the soil nitrogen cycle.

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Biofertilizers Enhance Soil Fertility and Crop Yields Through Microbial Community Modulation
Xu Zhang, Lei Zhang, Junjie Liu, Zongzuan Shen, Zhuxiu Liu, Haidong Gu, Xiaojing Hu, Zhenhua Yu, Yansheng Li, Jian Jin, Guanghua Wang
Agronomy.2025; 15(7): 1572. CrossRef
Strategy of nitrate-enhanced natural attenuation for remediation of PAHs-contaminated subsoil
Xuyang Jiang, Zhen Mao, Zhenqi Hu, Tao Jin, Licun Zhong, Jinbiao Yu
Journal of Environmental Chemical Engineering.2025; 13(5): 118037. CrossRef
Leveraging iron-rich recovered waste as a co-electron donor in sulfur autotrophic denitrification for simultaneous nitrate and phosphate removal from low C/N hydroponic wastewater
Sandesh Pandey, Anup Gurung, Choe Earn Choong, Suleman Shahzad, Fida Hussain, Woochang Kang, Syed Ejaz Hussain Mehdi, Aparna Sharma, Min Jang, Sang-Eun Oh
Journal of Water Process Engineering.2025; 79: 108948. CrossRef
narG, rather than napA, mediates aerobic nitrate reduction process in Pseudomonas putida Y-9
Yuwen Luo, Luo Luo, Xuejiao Huang, Daihua Jiang, Zhenlun Li
Water Research X.2025; 29: 100437. CrossRef

Characteristics of skin microbiome associated with disease severity in systemic sclerosis: Kyung-Ann Lee, Asad Ul-Haq, Hoonhee Seo, Sujin Jo, Sukyung Kim, Ho-Yeon Song, Hyun-Sook Kim; J. Microbiol. 2025;63(1):e.2409018. Published online January 24, 2025; DOI: https://doi.org/10.71150/jm.2409018

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Systemic sclerosis (SSc) is a chronic autoimmune disorder characterised by skin fibrosis and internal organ involvement. Disruptions in the microbial communities on the skin may contribute to the onset of autoimmune diseases that affect the skin. However, current research on the skin microbiome in SSc is lacking. This study aimed to investigate skin microbiome associated with disease severity in SSc. Skin swabs were collected from the upper limbs of 46 healthy controls (HCs) and 36 patients with SSc. Metagenomic analysis based on the 16S rRNA gene was conducted and stratified by cutaneous subtype and modified Rodnan skin score (mRSS) severity. Significant differences in skin bacterial communities were observed between the HCs and patients with SSc, with further significant variations based on subtype and mRSS severity. The identified biomarkers were Bacteroides and Faecalibacterium for patients with diffuse cutaneous SSc with high mRSS (≥ 10) and Mycobacterium and Parabacteroides for those with low mRSS (< 10). Gardnerella, Abies, Lactobacillus, and Roseburia were the biomarkers in patients with limited cutaneous SSc (lcSS) and high mRSS, whereas Coprococcus predominated in patients with lcSS and low mRSS. Cutaneous subtype analysis identified Pediococcus as a biomarker in the HCs, whereas mRSS analysis revealed the presence of Pseudomonas in conjunction with Pediococcus. In conclusion, patients with SSc exhibit distinct skin microbiota compared with healthy controls. Bacterial composition varies by systemic sclerosis cutaneous subtype and skin thickness.

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Microbiome therapeutic PMC72 through reverse translational research in gout
Mohammed Solayman Hossain, Hoonhee Seo, Kyung-Ann Lee, Asad ul-Haq, Sukyung Kim, Sujin Jo, Md Abdur Rahim, Hanieh Tajdozian, Fatemeh Ghorbanian, Youjin Yoon, Indrajeet Barman, Md Sarower Hossen Shuvo, Hyun-Sook Kim, Ho-Yeon Song
Journal of Microbiology.2025; 63(5): e2501002. CrossRef
Alterations of the skin microbiome in multiple system atrophy: a pilot study
Daji Chen, Lang Sun, Linlin Wan, Zhao Chen, LinLiu Peng, Jinzi Peng, Riwei Ouyang, Xiafei Long, Kefang Du, Xiao Dong, Xiaokang Wu, Xinying Xiao, Ruqing He, Rong Qiu, Beisha Tang, Hong Jiang
npj Parkinson's Disease.2025;[Epub] CrossRef
Analysis of skin mycobiota associated with alopecia in captive cynomolgus macaques (Macaca fascicularis) based on Oxford Nanopore Technologies
Natthanit Phokkhasub, Suthida Visedthorn, Pavit Klomkliew, Prangwalai Chanchaem, Kittima Phutthawong, Taratorn Kemthong, Vorthon Sawaswong, Ariya Khamwut, Suchinda Malaivijitnond, Sunchai Payungporn
F1000Research.2025; 14: 1228. CrossRef
Alterations in the Gut Microbiome in Ankylosing Spondylitis and Their Correlation with Disease Activity
Hyemin Jeong, Hoonhee Seo, Sukyung Kim, Md Abdur Rahim, Indrajeet Barman, Md Sarower Hossen Shuvo, Sujin Jo, Mohammed Solayman Hossain, Jeong-Ju Yoo, Young Ho Kim, Sung-Soo Jung, Ho-Yeon Song, Chan Hong Jeon
Journal of Microbiology and Biotechnology.2025;[Epub] CrossRef

Simultaneous gene editing of both nuclei in a dikaryotic strain of Ganoderma lucidum using Cas9-gRNA ribonucleoprotein: Yeon-Jae Choi, Hyerang Eom, Rutuja Nandre, Minseek Kim, Youn-Lee Oh, Sinil Kim, Hyeon-Su Ro; J. Microbiol. 2025;63(1):e.2409006. Published online January 24, 2025; DOI: https://doi.org/10.71150/jm.2409006

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The presence of multiple nuclei in a common cytoplasm poses a significant challenge to genetic modification in mushrooms. Here, we demonstrate successful gene editing in both nuclei of a dikaryotic strain of Ganoderma lucidum using the Cas9-gRNA ribonucleoprotein complex (RNP). The RNP targeting the pyrG gene was introduced into dikaryotic protoplasts of G. lucidum, resulting in the isolation of 31 mycelial colonies resistant to 5-fluoroorotic acid (5-FOA). Twenty-six of these isolates were confirmed as dikaryotic strains by the presence of two distinct A mating type markers, denoted as A1 and A2. All dikaryons exhibited clamp connections on their mycelial hyphae, while the remaining 5 transformants were monokaryotic. Subsequent sequence analysis of PCR amplicons targeting pyrG revealed that two dikaryons harbored disrupted pyrG in both nuclei (pyrG-/pyrG-), while 10 and 14 displayed pyrG+/pyrG- (A1/A2) and pyrG-/pyrG+ (A1/A2) configurations, respectively. The disruption was achieved through non-homologous end joining repair, involving deletion or insertion of DNA fragments at the site of the double-strand break induced by RNP. Importantly, the nuclei were stable throughout 10 serial transfers over a period of 6 months. These findings highlight the capability of RNP to target genes across multiple nuclei within the same cytoplasm.

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Gene Editing in Ganoderma lucidum: Development, Challenges, and Future Prospects
Shiqi He, Yuanchao Liu, Zhi Zhang, Manjun Cai, Yufan Hao, Huiping Hu
Journal of Fungi.2025; 11(4): 310. CrossRef
Development of a CRISPR/Cas9 RNP-mediated genetic engineering system in Paecilomyces variotii
Hui-Gang Han, Rutuja Nandre, Hyerang Eom, Yeon-Jae Choi, Hyeon-Su Ro
Journal of Microbiology.2025; 63(6): e2502011. CrossRef
CRISPR/Cas9-mediated gene editing in filamentous fungi, focusing on mushrooms and plant-pathogenic fungi
Rutuja Nandre, Hyerang Eom, Yeon-Jae Choi, Yanjiao Zhang, Hyeon-Su Ro
Fungal Biology Reviews.2025; 54: 100446. CrossRef
Screening of Monokaryotic Strains of Ganoderma sichuanense for Gene Editing Using CRISPR/Cas9
Le Li, Yuxuan Liu, Jianzhong Wu, Nuan Wen, Yang Song, Xue Wang, Zhuang Li, Huiying Sun, Yongping Fu
Journal of Fungi.2025; 12(1): 25. CrossRef

Journal Articles

CalR Inhibits the Swimming Motility and Polar Flagellar Gene Expression in Vibrio parahaemolyticus: Jingyang Chang, Yining Zhou, Miaomiao Zhang, Xue Li, Nan Zhang, Xi Luo, Bin Ni, Haisheng Wu, Renfei Lu, Yiquan Zhang; J. Microbiol. 2024;62(12):1125-1132. Published online December 6, 2024; DOI: https://doi.org/10.1007/s12275-024-00179-0

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Vibrio parahaemolyticus has two flagellar systems, the polar flagellum and lateral flagella, which are both intricately regulated by a multitude of factors. CalR, a LysR-type transcriptional regulator, is sensitive to calcium (Ca) and plays a crucial role in regulating the virulence and swarming motility of V. parahaemolyticus. In this study, we have demonstrated that the deletion of calR significantly enhances the swimming motility of V. parahaemolyticus under low Ca conditions but not under high Ca conditions or in the absence of Ca. CalR binds to the regulatory DNA regions of flgM, flgA, and flgB, which are located within the polar flagellar gene loci, with the purpose of repressing their transcription. Additionally, it exerts an indirect negative control over the transcription of flgK. The overexpression of CalR in Escherichia coli resulted in a reduction in the expression levels of flgM, flgA, and flgB, while having no impact on the expression of flgK. In summary, this research demonstrates that the negative regulation of V. parahaemolyticus swimming motility by CalR under low Ca conditions is achieved through its regulation on the transcription of polar flagellar genes.

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A DHH/DHHA1 family 3′-phosphoadenosine 5′-monophosphate (pAp) phosphoesterase Vp2835 is essential for regulating motility, biofilm formation and type III secretion system 1 in Vibrio parahaemolyticus
Chenzhi Zhuhuang, Chenxi Wang, Yu Sun, Min Chu, Menghua Yang, Guangzhi Xu
Food Bioscience.2025; 69: 106836. CrossRef
Chlorogenic Acid Targets Cell Integrity and Virulence to Combat Vibrio parahaemolyticus
Huan Liu, Jie Zhao, Yile Shi, Juanjuan Cao, Yanni Zhao
Foods.2025; 14(19): 3416. CrossRef
CalR is an activator of biofilm formation in Vibrio parahaemolyticus
Jingyang Chang, Yining Zhou, Miaomiao Zhang, Xue Li, Nan Zhang, Xi Luo, Bin Ni, Renfei Lu, Yiquan Zhang, Sophie Roussel
Applied and Environmental Microbiology.2025;[Epub] CrossRef
LtrA is critical for biofilm formation and colonization of Vibrio parahaemolyticus on food-related surfaces
Shuhui Xiong, Nan Zhang, Hui Sun, Miaomiao Zhang, Xue Li, Xi Luo, Yiquan Zhang, Renfei Lu
International Journal of Food Microbiology.2025; 441: 111327. CrossRef

Different Adaption Strategies of Abundant and Rare Microbial Communities in Sediment and Water of East Dongting Lake: Yabing Gu, Junsheng Li, Zhenghua Liu, Min Zhang, Zhaoyue Yang, Huaqun Yin, Liyuan Chai, Delong Meng, Nengwen Xiao; J. Microbiol. 2024;62(10):829-843. Published online October 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00171-8

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The dynamics of aquatic microbes is of great importance for comprehending the acclimatisation and evolution of microorganisms in lake ecology. However, little is known about the adaption strategies of microbial communities in East Dongting Lake, which had special and complexity geographical characteristics. A semi-enclosed lake area (A) and a waterway connected to Yangtze River (B) both existed in the lake zone. Here, we investigated bacterial and fungal community diversity, community network and community assembly processes in sediment and water. The results indicated that the proportion of OTU numbers and their relative abundance for rare and abundant taxa were different obviously between sediment and water, but not between bacteria and fungi. However, abundant subcommunities dominated the shifts of bacterial community diversity and structure in A region, while rare subcommunities for fungal community diversity. Compared to fungal community, bacterial network was more compact and more key stones were identified as rare taxa. In addition, stochastic processes (dispersal limitation) drove the community assembly of abundant and rare subcommunities, but the effects of deterministic processes (including variable and heterogeneous selections) affected more on rare rather than abundant taxa. Partial Mantel test further indicated that the effect of environmental factors was a stronger force in shaping abundant bacterial subcommunities (TOC, NH₄⁺-N, TN, and ORP) and rare fungal subcommunities (ORP). Environmental factors explained more of the variation in bacterial community structure than that in fungal community structure, although they had additional effects on fungal community diversity and community assembly. Moreover, bacterial community affected the fungal community as a biotic factor in water. This research provided new insights into better understanding of microbial communities in the complex environment of the East Dongting Lake.

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Bacterial and environmental factors had alternatively dominant effects on ecosystem multifunctionality of river–lake continuum: A rate-focused study
Xiujun Wang, Caixia Peng, Mengyuan Li, Junxiang Cheng, Ligang Xu, Qinglong L. Wu, Jin Zeng
Ecological Indicators.2026; 182: 114416. CrossRef
Analysis of soil microbial diversity of Miscanthus lutarioriparius communities in different areas of Dongting Lake
Zixuan Yu, Peng Zhu, Bo Li, Hong-Ge Qian, Qingqing Hu, Sai Yang
Frontiers in Environmental Science.2026;[Epub] CrossRef
Diversity patterns and community assembly of the microbial community of periphyton in an urban Fenhe River under seasonal changes
Kangxu Zhao, Hanjie Huang, Wei Wang, Xudong Liu, Junping Lv, Zhengyu Hu, Ying Shi, Shulian Xie, Jia Feng
Journal of Environmental Chemical Engineering.2025; 13(5): 118148. CrossRef
The assembly processes and network characteristics of bacterial, fungal and archaeal communities in the middle Yangtze River and river-connected lakes
Fenglin Wang, Si Li, Pinjian Li, Chuanzhe Feng, Zhijie Zhao, Yulong Yang, Fulei Han, An Xue, Zhenshan Li, Peng Han
Frontiers in Microbiology.2025;[Epub] CrossRef

Review

Extensive Genomic Rearrangement of Catalase-Less Cyanobloom-Forming Microcystis aeruginosa in Freshwater Ecosystems: Minkyung Kim, Jaejoon Jung, Wonjae Kim, Yerim Park, Che Ok Jeon, Woojun Park; J. Microbiol. 2024;62(11):933-950. Published online October 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00172-7

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Many of the world's freshwater ecosystems suffer from cyanobacteria-mediated blooms and their toxins. However, a mechanistic understanding of why and how Microcystis aeruginosa dominates over other freshwater cyanobacteria during warmer summers is lacking. This paper utilizes comparative genomics with other cyanobacteria and literature reviews to predict the gene functions and genomic architectures of M. aeruginosa based on complete genomes. The primary aim is to understand this species' survival and competitive strategies in warmer freshwater environments. M. aeruginosa strains exhibiting a high proportion of insertion sequences (~ 11%) possess genomic structures with low synteny across different strains. This indicates the occurrence of extensive genomic rearrangements and the presence of many possible diverse genotypes that result in greater population heterogeneities than those in other cyanobacteria in order to increase survivability during rapidly changing and threatening environmental challenges. Catalase-less M. aeruginosa strains are even vulnerable to low light intensity in freshwater environments with strong ultraviolet radiation. However, they can continuously grow with the help of various defense genes (e.g., egtBD, cruA, and mysABCD) and associated bacteria. The strong defense strategies against biological threats (e.g., antagonistic bacteria, protozoa, and cyanophages) are attributed to dense exopolysaccharide (EPS)-mediated aggregate formation with efficient buoyancy and the secondary metabolites of M. aeruginosa cells. Our review with extensive genome analysis suggests that the ecological vulnerability of M. aeruginosa cells can be overcome by diverse genotypes, secondary defense metabolites, reinforced EPS, and associated bacteria.

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Wonjae Kim, Yerim Park, Yongjun Son, Nayeon Yoo, Eui-Hwan Chung, Woojun Park
Journal of Hazardous Materials.2026; 501: 140736. CrossRef
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Tzipora Peretz, Esther Cattan‐Tsaushu, Chiara Conti, Benyamin Rosental, Laura Steindler, Sarit Avrani
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Public goods-mediated bacterial interplay in aquatic ecosystems
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Annual Review of Microbiology .2025; 79(1): 685. CrossRef

Journal Articles

The Gut Microbiota Mediates the Protective Effects of Spironolactone on Myocardial Infarction: Lu Li, Jian-Yong Sun, Yu-Lin Li, Shi-Wei Zhu, Sheng-Zhong Duan; J. Microbiol. 2024;62(10):883-895. Published online September 3, 2024; DOI: https://doi.org/10.1007/s12275-024-00164-7

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Abstract PDF

Myocardial infarction (MI) is a type of cardiovascular disease that influences millions of human beings worldwide and has a great rate of mortality and morbidity. Spironolactone has been used as a critical drug for the treatment of cardiac failure and it ameliorates cardiac dysfunction post-MI. Despite these findings, whether there is a relationship between the therapeutic effects of spironolactone and the gut microorganism after MI has not been determined. In our research, we used male C57BL/6 J mice to explore whether the gut microbiota mediates the beneficial function of spironolactone after myocardial infarction. We demonstrated that deletion of the gut microbiota eliminated the beneficial function of spironolactone in MI mice, displaying exacerbated cardiac dysfunction, cardiac infarct size. In addition, the gut microbiota was altered by spironolactone after sham or MI operation in mice. We also used male C57BL/6 J mice to investigate the function of a probiotic in the myocardial infarction. In summary, our findings reveal a precious role of the gut flora in the therapeutic function of spironolactone on MI.

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Probiotics and Prebiotics in Post-Myocardial Infarction Rehabilitation: Mechanisms, Benefits, and Future Directions
Georgy Leonov, Elena Livantsova, Yurgita Varaeva, Antonina Starodubova
Current Nutrition Reports.2025;[Epub] CrossRef
Research Trends and Hotspots of Gut Microbiota and Its Metabolites in Cardiovascular Diseases: A Bibliometric Analysis
Kaixuan Zhang, Yajun Shi, Lirong Peng, Xiaofei Zhang, Nanbo Zheng, Jiajing Xin, Junbo Zou, Fei Luan
Journal of Multidisciplinary Healthcare.2025; Volume 18: 5125. CrossRef
Insights into the role of gut microbiota modulation in the management of various cardiovascular diseases: A new approach for improving the efficacy of current cardiovascular medications
Lamiaa A. Ahmed, Khaled F. Al-Massri
European Journal of Pharmacology.2025; 1007: 178210. CrossRef
The role of the gut microbiota in the onset and progression of heart failure: insights into epigenetic mechanisms and aging
Giulia Matacchione, Francesco Piacenza, Lorenzo Pimpini, Yuri Rosati, Serena Marcozzi
Clinical Epigenetics.2024;[Epub] CrossRef

Enhanced Poly-γ-Glutamic Acid Production by a Newly Isolated Bacillus halotolerans F29: Xiaorong Sun, Yaoyu Cai, Dexin Wang; J. Microbiol. 2024;62(8):695-707. Published online August 20, 2024; DOI: https://doi.org/10.1007/s12275-024-00153-w

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Abstract PDF

Poly-γ-glutamic acid (γ-PGA) is a promising biopolymer for various applications. In this study, we isolated a novel γ-PGA-producing strain, Bacillus halotolerans F29. The one-factor-at-a-time method was used to investigate the influence of carbon sources, nitrogen sources, and culture parameters on γ-PGA production. The optimal carbon and nitrogen sources were sucrose and (NH₄)₂SO₄, respectively. The optimal culture conditions for γ-PGA production were determined to be 37 °C and a pH of 5.5. Response surface methodology was used to determine the optimum medium components: 77.6 g/L sucrose, 43.0 g/L monosodium glutamate, and 2.2 g/L K₂HPO₄. The γ-PGA titer increased significantly from 8.5 ± 0.3 g/L to 20.7 ± 0.7 g/L when strain F29 was cultivated in the optimized medium. Furthermore, the γ-PGA titer reached 50.9 ± 1.5 g/L with a productivity of 1.33 g/L/h and a yield of 2.23 g of γ-PGA/g of L-glutamic acid with the optimized medium in fed-batch fermentation. The maximum γ-PGA titer reached 45.3 ± 1.1 g/L, with a productivity of 1.06 g/L/h when molasses was used as a carbon source. It should be noted that the γ-PGA yield in this study was the highest of all reported studies, indicating great potential for the industrial production of γ-PGA.

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Investigation of glutamic acid production capacity of Stenotrophomonas sp. strain CG2 isolated from soil
Cihat Guner, Ertan Ermis, Kubra Ozkan Guner
Biocatalysis and Agricultural Biotechnology.2025; 67: 103665. CrossRef
Metabolic engineering of microorganisms for tailor-made biopolymer production: A review
Mădălina Lorena Medeleanu, Lavinia-Florina Călinoiu, Gheorghe-Adrian Martău, Dan-Cristian Vodnar
International Journal of Biological Macromolecules.2025; 330: 147922. CrossRef
Poly-γ-glutamic acid production from untreated sugarcane molasses by non-sterilized repeated-batch fermentation with Bacillus subtilis GLS-8
Yu Lin, Lin Shu, Huizhen Chen, Xiaoqun Duan, Wei Zeng
Chemical Engineering Journal Advances.2025; 24: 100900. CrossRef
Transcriptomics-guided rational engineering in Bacillus licheniformis for enhancing poly-γ-glutamic acid biosynthesis using untreated molasses
Rui Han, Qian Zhong, Yifan Yan, Juan Wang, Yifan Zhu, Sha Li, Peng Lei, Rui Wang, Yibin Qiu, Zhengshan Luo, Hong Xu
International Journal of Biological Macromolecules.2024; 282: 137514. CrossRef

Cultivation of Diverse Novel Marine Bacteria from Deep Ocean Sediment Using Spent Culture Supernatant of Ca. Bathyarchaeia Enrichment: Sidra Erum Ishaq, Tariq Ahmad, Lewen Liang, Ruize Xie, Tiantian Yu, Yinzhao Wang, Fengping Wang; J. Microbiol. 2024;62(8):611-625. Published online July 10, 2024; DOI: https://doi.org/10.1007/s12275-024-00145-w

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Most microorganisms resist pure cultivation under conventional laboratory conditions. One of the primary issues for this un-culturability is the absence of biologically produced growth-promoting factors in traditionally defined growth media. However, whether cultivating microbes by providing spent culture supernatant of pivotal microbes in the growth medium can be an effective approach to overcome this limitation is still an under-explored area of research. Here, we used the spent culture medium (SCM) method to isolate previously uncultivated marine bacteria and compared the efficiency of this method with the traditional cultivation (TC) method. In the SCM method, Ca. Bathyarchaeia-enriched supernatant (10%) was used along with recalcitrant organic substrates such as lignin, humic acid, and organic carbon mixture. Ca. Bathyarchaeia, a ubiquitous class of archaea, have the capacity to produce metabolites, making their spent culture supernatant a key source to recover new bacterial stains. Both cultivation methods resulted in the recovery of bacterial species from the phyla Pseudomonadota, Bacteroidota, Actinomycetota, and Bacillota. However, our SCM approach also led to the recovery of species from rarely cultivated groups, such as Planctomycetota, Deinococcota, and Balneolota. In terms of the isolation of new taxa, the SCM method resulted in the cultivation of 80 potential new strains, including one at the family, 16 at the genus, and 63 at the species level, with a novelty ratio of ~ 35% (80/219). In contrast, the TC method allowed the isolation of ~ 10% (19/171) novel strains at species level only. These findings suggest that the SCM approach improved the cultivation of novel and diverse bacteria.

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Engineering the phycosphere: fundamental concepts and tools for the bottom-up design of microalgal-bacterial consortia
Austin Semple, Jagroop Pandhal
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Abhay B. Fulke, Nilkanth Sharma, Jayshree Nadekar
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The bacterial community of the freshwater bryozoan Cristatella mucedo and its secondary metabolites production potential
Inmaculada Tocino-Márquez, Martin Zehl, Joana Séneca, Petra Pjevac, Manuel Felkl, Christian F. W. Becker, Alexander Loy, Thomas Rattei, Andrew N. Ostrovsky, Sergey B. Zotchev
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Uncertainty Analysis of Biogas Generation and Gas Hydrate Accumulations in the Baiyun Sag, South China Sea
Pibo Su, Jinqiang Liang, Huai Cheng, Yaoyao Lv, Wei Zhang, Zuofei Zhu
Microorganisms.2024; 13(1): 5. CrossRef

Medium Chain Length Polyhydroxyalkanoate Production by Engineered Pseudomonas gessardii Using Acetate-formate as Carbon Sources: Woo Young Kim, Seung-Jin Kim, Hye-Rin Seo, Yoonyong Yang, Jong Seok Lee, Moonsuk Hur, Byoung-Hee Lee, Jong-Geol Kim, Min-Kyu Oh; J. Microbiol. 2024;62(7):569-579. Published online May 3, 2024; DOI: https://doi.org/10.1007/s12275-024-00136-x

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Production of medium chain length polyhydroxyalkanoate (mcl-PHA) was attempted using Pseudomonas gessardii NIBRBAC000509957, which was isolated from Sunchang, Jeollabuk-do, Republic of Korea (35°24'27.7"N, 127°09'13.0"E) and effectively utilized acetate and formate as carbon sources. We first evaluated the utilization of acetate as a carbon source, revealing optimal growth at 5 g/L acetate. Then, formate was supplied to the acetate minimal medium as a carbon source to enhance cell growth. After overexpressing the acetate and formate assimilation pathway enzymes, this strain grew at a significantly higher rate in the medium. As this strain naturally produces PHA, it was further engineered metabolically to enhance mcl-PHA production. The engineered strain produced 0.40 g/L of mcl-PHA with a biomass content of 30.43% in fed-batch fermentation. Overall, this strain can be further developed to convert acetate and formate into valuable products.

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Formate-driven photoautotrophic growth and biopolymer storage in anaerobic purple bacteria
Mohammad Adib Ghazali Abdul Rahman, Bronwyn Laycock, Steven Pratt, Damien J. Batstone
Bioresource Technology.2025; 434: 132753. CrossRef
Sulphide and oleic acid synergism in accelerating mcl-PHA biopolymer production in Pseudomonas aeruginosa MCC 5300 by modulating electron transport system
Raghavendra Paduvari, Divyashree Somashekara
Biochemistry and Biophysics Reports.2025; 44: 102286. CrossRef
Unlocking efficient polyhydroxyalkanoate production by Gram-positive Priestia megaterium using waste-derived feedstocks
Xinyi Bai, Libo Xu, Kang Li, Guangbao Zhang, Mengjun Zhang, Yi Huang
Microbial Cell Factories.2025;[Epub] CrossRef
Selective utilization of formic acid and acetic acid in succinic acid fermentation broth to produce single-cell protein using Rhodotorula glutinis
Fuqiang Liu, Pengfei Wu, Lin Yu, Zitu Lü, Xinying Sun, Jiaxin Li, Lei Liu, Jing Wu, Jianan Zhang
Bioprocess and Biosystems Engineering.2025;[Epub] CrossRef

Sporosarcina jeotgali sp. nov., Sporosarcina oncorhynchi sp. nov., and Sporosarcina trichiuri sp. nov., Isolated from Jeotgal, a Traditional Korean Fermented Seafood: Ah-In Yang, Bora Kim, Sung-Hong Joe, Hae-In Joe, Hanna Choe, Ki Hyun Kim, Min Ok Jun, Na-Ri Shin; J. Microbiol. 2024;62(4):285-296. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00106-3

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Abstract PDF

Three novel, Gram-stain-positive, obligate aerobic, catalase- and oxidase-positive bacterial strains, designated B2O-1(T), T2O-4(T), and 0.2-SM1T-5(T), were isolated from jeotgal, a traditional Korean fermented seafood. Strains B2O-1(T), T2O-4(T), and 0.2-SM1T-5(T) exhibited distinct colony colors, characterized by pink, yellow, and red opaque circular colonies, respectively. Phylogenetic analysis revealed that three strains formed a paraphyletic clade within the genus Sporosarcina and shared < 99.0% similarity with Sporosarcina aquimarina KCTC 3840(T) and Sporosarcina saromensis KCTC 13119(T) in their 16S rRNA gene sequences. The three strains exhibiting Orthologous Average Nucleotide Identity values < 79.3% and digital DNA-DNA hybridization values < 23.1% within the genus Sporosarcina affirmed their distinctiveness. Strains B2O-1(T), T2O-4(T), and 0.2-SM1T-5(T) contained MK-7 as a sole respiratory menaquinone and A4α type peptidoglycan based on lysine with alanine, glutamic acid, and aspartic acid. The common polar lipids include diphosphatidylglycerol, phosphatidylglycerol, and phosphatidylethanolamine. Strain T2O-4(T) contained one unidentified phospholipid, whereas strain 0.2-SM1T-5(T) contained two unidentified phospholipids. Cellular fatty acid profiles, with C(15:0) anteiso as the major fatty acid, supported the affiliation of the three strains to the genus Sporosarcina. Based on the polyphasic characteristics, strains B2O-1(T) (= KCTC 43506(T) = JCM 36032(T)), T2O-4(T) (= KCTC 43489(T) = JCM 36031(T)), and 0.2-SM1T-5(T) (= KCTC 43519(T) = JCM 36034(T)) represent three novel species within the genus Sporosarcina, named Sporosarcina jeotgali sp. nov., Sporosarcina oncorhynchi sp. nov., and Sporosarcina trichiuri sp. nov., respectively.

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Notification of changes in taxonomic opinion previously published outside the IJSEM. List of Changes in Taxonomic Opinion no. 41
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef
Brevibacterium koreense sp. nov., a moderately halophilic bacterium isolated from jogae-jeotgal, a Korean fermented seafood
Sohee Nam, Yujin Kim, Min Ji Lee, Yeon Bee Kim, Jeong Ui Yun, Mi-Ja Jung, Hye Seon Song, Se Hee Lee, Seok-Jun Kim, Tae Woong Whon
International Journal of Systematic and Evolutionary Microbiology .2025;[Epub] CrossRef
Bacteroides celer sp. nov. and Bacteroides mucinivorans sp. nov., isolated from human feces, and the reclassification of Bacteroides koreensis Shin et al. 2017 and Bacteroides kribbi Shin et al. 2017 as later heterotypic synonyms of Bacteroides ovatus Egg
Ah-In Yang, Bora Kim, Woorim Kang, Hae-In Joe, Na-Ri Shin
Journal of Microbiology.2025; 63(6): e2502006. CrossRef
Validation List no. 220. Valid publication of new names and new combinations effectively published outside the IJSEM
Aharon Oren, Markus Göker
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef

Mycobacterium tuberculosis PE_PGRS45 (Rv2615c) Promotes Recombinant Mycobacteria Intracellular Survival via Regulation of Innate Immunity, and Inhibition of Cell Apoptosis: Tao Xu , Chutong Wang , Minying Li , Jing Wei , Zixuan He , Zhongqing Qian , Xiaojing Wang , Hongtao Wang; J. Microbiol. 2024;62(1):49-62. Published online February 9, 2024; DOI: https://doi.org/10.1007/s12275-023-00101-0

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Abstract PDF

Tuberculosis (TB), a bacterial infectious disease caused by Mycobacterium tuberculosis (M. tuberculosis), is a significant global public health problem. Mycobacterium tuberculosis expresses a unique family of PE_PGRS proteins that have been implicated in pathogenesis. Despite numerous studies, the functions of most PE_PGRS proteins in the pathogenesis of mycobacterium infections remain unclear. PE_PGRS45 (Rv2615c) is only found in pathogenic mycobacteria. In this study, we successfully constructed a recombinant Mycobacterium smegmatis (M. smegmatis) strain which heterologously expresses the PE_PGRS45 protein. We found that overexpression of this cell wall-associated protein enhanced bacterial viability under stress in vitro and cell survival in macrophages. MS_PE_PGRS45 decreased the secretion of pro-inflammatory cytokines such as IL-1β, IL-6, IL-12p40, and TNF-α. We also found that MS_PE_PGRS45 increased the expression of the anti-inflammatory cytokine IL-10 and altered macrophage-mediated immune responses. Furthermore, PE_PGRS45 enhanced the survival rate of M. smegmatis in macrophages by inhibiting cell apoptosis. Collectively, our findings show that PE_PGRS45 is a virulent factor actively involved in the interaction with the host macrophage.

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Evolution of the PE_PGRS Proteins of Mycobacteria: Are All Equal or Are Some More Equal than Others?
Bei Chen, Belmin Bajramović, Bastienne Vriesendorp, Herman Pieter Spaink
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Recent advances in research on Mycobacterium tuberculosis virulence factors and their role in pathogenesis
Ming-Rui Sun, Jia-Yin Xing, Xiao-Tian Li, Ren Fang, Yang Zhang, Zhao-Li Li, Ning-Ning Song
Journal of Microbiology, Immunology and Infection.2025; 58(5): 497. CrossRef
Rv2741 Promotes Mycobacterium Survival by Modulating Macrophage Function via the IL-1α-MAPK Axis
Xintong He, Yonglin He, Xichuan Deng, Nan Lu, Anlong Li, Sijia Gao, Shiyan He, Yuran Wang, Nanzhe Fu, Zijie Wang, Yuxin Nie, Lei Xu
ACS Infectious Diseases.2025; 11(3): 676. CrossRef
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[Protocol] Use of Cas9 Targeting and Red Recombination for Designer Phage Engineering: Shin-Yae Choi , Danitza Xiomara Romero-Calle , Han-Gyu Cho , Hee-Won Bae , You-Hee Cho; J. Microbiol. 2024;62(1):1-10. Published online February 1, 2024; DOI: https://doi.org/10.1007/s12275-024-00107-2

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Abstract PDF

Bacteriophages (phages) are natural antibiotics and biological nanoparticles, whose application is significantly boosted by recent advances of synthetic biology tools. Designer phages are synthetic phages created by genome engineering in a way to increase the benefits or decrease the drawbacks of natural phages. Here we report the development of a straightforward genome engineering method to efficiently obtain engineered phages in a model bacterial pathogen, Pseudomonas aeruginosa. This was achieved by eliminating the wild type phages based on the Streptococcus pyogenes Cas9 (SpCas9) and facilitating the recombinant generation based on the Red recombination system of the coliphage λ (λRed). The producer (PD) cells of P. aeruginosa strain PAO1 was created by miniTn7-based chromosomal integration of the genes for SpCas9 and λRed under an inducible promoter. To validate the efficiency of the recombinant generation, we created the fluorescent phages from a temperate phage MP29. A plasmid bearing the single guide RNA (sgRNA) gene for selectively targeting the wild type gp35 gene and the editing template for tagging the Gp35 with superfolder green fluorescent protein (sfGFP) was introduced into the PD cells by electroporation. We found that the targeting efficiency was affected by the position and number of sgRNA. The fluorescent phage particles were efficiently recovered from the culture of the PD cells expressing dual sgRNA molecules. This protocol can be used to create designer phages in P. aeruginosa for both application and research purposes.

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Review

Targeting innate immune sensors for therapeutic strategies in infectious diseases: Seyun Shin, Young Ki Choi, SangJoon Lee; J. Microbiol. 2025;63(6):e2503009. Published online June 30, 2025; DOI: https://doi.org/10.71150/jm.2503009

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The innate immune system relies on innate immune sensors, such as pattern recognition receptors (PRRs), to detect pathogens and initiate immune responses, crucial for controlling infections but also implicated in inflammatory diseases. These innate immune sensors, including Toll-like receptors (TLRs), nod-like receptors (NLRs), RIG-I-like receptors (RLRs), absent in melanoma 2 (AIM2), and Z-DNA binding protein 1 (ZBP1) trigger signaling pathways that produce cytokines, modulating inflammation and cell death. Traditional therapies focus on directly targeting pathogens; however, host-targeting therapeutic strategies have emerged as innovative approaches to modulate innate immune sensor activity. These strategies aim to fine-tune the immune response, either enhancing antiviral defenses or mitigating hyperinflammation to prevent tissue damage. This review explores innate immune sensor-based therapeutic approaches, including inhibitors, agonists, and antagonists, that enhance antiviral defense or suppress harmful inflammation, highlighting innate immune sensors as promising targets in infectious and inflammatory disease treatment.

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Jing Chen, Yuan Ma, Zhi-Min Rao, Song-Lin Jiang, Ying-Jun Lou, Karim Malik, Arman Chowdhury, Hua-Zhong Ying, Chen-Huan Yu
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Full article

Microbiome therapeutic PMC72 through reverse translational research in gout: Mohammed Solayman Hossain, Hoonhee Seo, Kyung-Ann Lee, Asad ul-Haq, Sukyung Kim, Sujin Jo, Md Abdur Rahim, Hanieh Tajdozian, Fatemeh Ghorbanian, Youjin Yoon, Indrajeet Barman, Md Sarower Hossen Shuvo, Hyun-Sook Kim, Ho-Yeon Song; J. Microbiol. 2025;63(5):e2501002. Published online May 27, 2025; DOI: https://doi.org/10.71150/jm.2501002

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Abstract PDF Supplementary Material

Gout is an inflammatory arthritis resulting from the deposition of monosodium urate crystals. Urate-lowering therapies for gout have limitations, including side effects and limited efficacy, highlighting the need for novel therapeutic approaches to improve patient outcomes. In this context, our research team conducted a microbiome analysis of fecal samples from healthy individuals and gout patients, identifying Bifidobacterium as a key biomarker. Subsequently, we isolated and identified this strain, B. longum PMC72, and demonstrated its efficacy in a gout mouse model. In potassium oxonate (PO)-induced hyperuricemia mice, PMC72 significantly alleviated nausea, gait disturbances, ankle inflammation, and improved renal health. These effects were associated with marked reductions in oxidative stress markers, including serum uric acid, blood urea nitrogen, hepatic xanthine oxidase, and malondialdehyde (MDA) levels in serum, liver, and joint samples, as well as the downregulation of inflammation and uric acid transport-related gene expression in kidney samples. These benefits were comparable to those treated with Febuxostat, a standard urate-lowering therapy for gout. Furthermore, gut microbiome analysis revealed that PMC72 restored dysbiosis induced by hyperuricemia, contrasting with the reduced microbial diversity observed with febuxostat alone, and showed a complete recovery to eubiosis when combined with Febuxostat. These findings position PMC72 as a promising microbial therapeutic candidate for gout management, demonstrating significant development potential and serving as a benchmark for reverse translational microbiome-based therapeutic research.

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Md Sarower Hossen Shuvo, Sukyung Kim, Sujin Jo, Md Abdur Rahim, Indrajeet Barman, Mohammed Solayman Hossain, Yoonkyoung Jeong, Hwasik Jeong, Sangrim Kim, Hoonhee Seo, Ho-Yeon Song
Polish Journal of Microbiology.2025; 74(4): 428. CrossRef
Quantitative assessment of microbial dynamics in livestock manure and municipal wastewater treatment plants
Geon Choi, Hokyung Song, Tatsuya Unno
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Flavonifractor plautii as a Next-Generation Probiotic Enhancing the NGP F/P Index in a Simulated Human Gut Microbiome Ecosystem
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Pharmaceutics.2025; 17(12): 1603. CrossRef

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