Journal of Microbiology

Volume 59(8); August 2021

Journal Article

Lysobacter arenosi sp. nov. and Lysobacter solisilvae sp. nov. isolated from soil: Kyeong Ryeol Kim† , Kyung Hyun Kim† , Shehzad Abid Khan , Hyung Min Kim , Dong Min Han , Che Ok Jeon; J. Microbiol. 2021;59(8):709-718. Published online June 1, 2021; DOI: https://doi.org/10.1007/s12275-021-1156-y

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Two Gram-stain negative, yellow-pigmented, and mesophilic bacteria, designated strains R7T and R19T, were isolated from sandy and forest soil, South Korea, respectively. Both strains were non-motile rods showing catalase- and oxidase-positive activities. Both strains were shown to grow at 10–37°C and pH 6.0–9.0, and in the presence of 0–1.5% (w/v) NaCl. Strain R7T contained iso-C14:0, iso-C15:0, iso-C16:0, and summed feature 9 (comprising C16:0 10-methyl and/or iso-C17:1 ω9c), whereas strain R19T contained iso-C11:0 3-OH, C16:1 ω7c alcohol, iso-C11:0, iso-C15:0, iso-C16:0, and summed feature 9 (comprising C16:0 10-methyl and/or iso-C17:1 ω9c) as major cellular fatty acids (> 5%). Both strains contained ubiquinone- 8 as the sole isoprenoid quinone and phosphatidylglycerol, phosphatidylethanolamine, and an unidentified phospholipid as the major polar lipids. The DNA G + C contents of strains R7T and R19T calculated from their genomes were 66.9 mol% and 68.9 mol%, respectively. Strains R7T and R19T were most closely related to Lysobacter panacisoli C8-1T and Lysobacter niabensis GH34-4T with 98.7% and 97.8% 16S rRNA sequence similarities, respectively. Phylogenetic analyses based on 16S rRNA gene sequences showed that strains R7T and R19T formed distinct phylogenetic lineages within the genus Lysobacter. Based on phenotypic, chemotaxonomic, and molecular features, strains R7T and R19T represent novel species of the genus Lysobacter, for which the names Lysobacter arenosi sp. nov. and Lysobacter solisilvae sp. nov. are proposed. The type strains of L. arenosi and L. solisilvae are R7T (= KACC 21663T = JCM 34257T) and R19T (= KACC 21767T = JCM 34258T), respectively.

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Luteimonas flava sp. nov. and Aquilutibacter rugosus gen. nov., sp. nov., isolated from freshwater environments in China and re-examining the taxonomic status of genera Luteimonas and Lysobacter
Huibin Lu, Li Chen, Yujing Wang, Peng Xing, Qinglong Wu
International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
Saline soil improvement promotes the transformation of microbial salt tolerance mechanisms and microbial-plant-animal ecological interactions
Keyu Yao, Guanghao Wang, Wen Zhang, Qiang Liu, Jian Hu, Mao Ye, Xin Jiang
Journal of Environmental Management.2024; 372: 123360. CrossRef
Optimal Irrigation and Fertilization Enhanced Tomato Yield and Water and Nitrogen Productivities by Increasing Rhizosphere Microbial Nitrogen Fixation
Hongfei Niu, Tieliang Wang, Yongjiang Dai, Mingze Yao, Bo Li, Jiaqi Zheng, Lizhen Mao, Mingyu Zhao, Zhanyang Xu, Feng Zhang
Agronomy.2024; 14(9): 2111. CrossRef
Short-term effect of reclaimed wastewater quality gradient on soil microbiome during irrigation
V. Moulia, N. Ait-Mouheb, G. Lesage, J. Hamelin, N. Wéry, V. Bru-Adan, L. Kechichian, M. Heran
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Dyadobacter pollutisoli sp. nov., isolated from plastic waste landfill soil
Kyeong Ryeol Kim, Jeong Min Kim, Jae Kyeong Lee, Dong Min Han, Lujiang Hao, Che Ok Jeon
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
Physiological and genomic analyses of cobalamin (vitamin B12)-auxotrophy of Lysobacter auxotrophicus sp. nov., a methionine-auxotrophic chitinolytic bacterium isolated from chitin-treated soil
Akihiro Saito, Hideo Dohra, Moriyuki Hamada, Ryota Moriuchi, Yohei Kotsuchibashi, Koji Mori
International Journal of Systematic and Evolutionary Microbiology .2023;[Epub] CrossRef
Nitratireductor rhodophyticola sp. nov., isolated from marine red algae
Kyung Hyun Kim, Sylvia Kristyanto, Hyung Min Kim, Kyeong Ryeol Kim, Che Ok Jeon
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Description of Corynebacterium poyangense sp. nov., isolated from the feces of the greater white-fronted geese (Anser albifrons)
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Lysobacter ciconiae sp. nov., and Lysobacter avium sp. nov., isolated from the faeces of an Oriental stork
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Isolation and characterization of tick-borne Roseomonas haemaphysalidis sp. nov. and rodent-borne Roseomonas marmotae sp. nov.
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Rhodococcus oxybenzonivorans sp. nov., a benzophenone-3-degrading bacterium, isolated from stream sediment
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Response of sheep rumen fermentation and microbial communities to feed infected with the endophyte Epichloë gansuensis as evaluated with rumen-simulating technology: Yaling Ma , Hucheng Wang , Chunjie Li; J. Microbiol. 2021;59(8):719-728.; DOI: https://doi.org/10.1007/s12275-021-1113-9

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Abstract

Achnatherum inebrians, a perennial grass, is widely distributed in China. When infected by the endophyte Epichloë gansuensis, A. inebrians produces an abundance of alkaloids that enhance plant survival but are toxic to animals. Here we used in vitro fermentation to study the impact of endophyte- infected A. inebrians (E+) addition on rumen fermentation characteristics and on microbial community and diversity as assessed with amplicon sequencing technology. We examined E+ addition at five levels, E0, E25, E50, E75, and E100, corresponding to 0%, 25%, 50%, 75%, and 100% of the fermentation substrate, respectively. Both the fermentation characteristics and rumen microbial community structure differed significantly among treatments. E100 resulted in the highest values for pH, the Shannon index, Kiritimatiellaeota, and Lentisphaerae levels relative to the other treatments. In contrast, E25 was associated with higher levels of ammonia nitrogen, total volatile fatty acid, propionate, butyrate, isobutyrate, valerate, of the phyla Bacteroidetes and Firmicutes, and of the genus Prevotella_1, Succiniclasticum, Family_XIII_AD3011_group, Rikenellaceae_RC9_gut_group, Prevotellaceae_UCG-001, and Pyramidobacter as compared with other treatments. E50 resulted in the greatest values for the abundance-based coverage estimator (ACE) and the Chao1 index as compared with other treatments. E0 resulted in the greatest values for digestibility of dry matter, gas production, acetate, and Ruminobacter as compared with other treatments. This approach avoided animal toxicity experiments and confirmed that rumen fermentation characteristics and rumen microbiota were affected by E+ toxin. Therefore, E25 showed higher abundance in Prevotella_1, Prevotellaceae_ UCG-001, and Lachnospiraceae_XPB1014_group that implied they should play significant roles in E+ alkaloids degradation. And then, we can infer that rumen microorganisms should function as an antidote with respect to this poisoning reaction at moderate dietary percentages of E+.

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Effect of Potato Vine and Leaf Mixed Silage to Whole Corn Crops on Rumen Fermentation and the Microbe of Fatten Angus Bulls
Siyu Zhang, Jiajie Deng, Yafang Cui, Lina Wang, Yingqi Li, Xianli Wang, Shengnan Min, Huili Wang, Qianzi Zhang, Peiqi Li, Yawen Luo, Xinjun Qiu, Yang He, Binghai Cao, Huawei Su
Fermentation.2023; 9(8): 704. CrossRef
Yeast (Saccharomyces cerevisiae) Culture Promotes the Performance of Fattening Sheep by Enhancing Nutrients Digestibility and Rumen Development
Jie Wang, Guohong Zhao, Yimin Zhuang, Jianmin Chai, Naifeng Zhang
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The effects of fermented pineapple residue on growth performance, meat quality, and rumen microbiota of fattening Simmental bull
Ming Deng, Zupeng Xiao, Guangbin Liu, Baoli Sun, Yongqing Guo, Xian Zou, Dewu Liu, Zhenwei Yang, Yaokun Li
Frontiers in Microbiology.2022;[Epub] CrossRef
The Potential Use of Endophyte-Free inebrians as Sheep Feed Evaluated with In Vitro Fermentation
Yaling Ma, Hucheng Wang, Chunjie Li, Kamran Malik
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Journal Articles

Effect of exopolysaccharides of Paenibacillus polymyxa rhizobacteria on physiological and morphological variables of wheat seedlings: Irina V. Yegorenkova , Kristina V. Tregubova , Alexander I. Krasov , Nina V. Evseeva , Larisa Yu. Matora; J. Microbiol. 2021;59(8):729-735. Published online July 24, 2021; DOI: https://doi.org/10.1007/s12275-021-0623-9

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Abstract

Paenibacillus polymyxa is a promising plant-growth-promoting rhizobacterium that associates with a wide range of host plants, including agronomically important ones. Inoculation of wheat seedlings with P. polymyxa strains CCM 1465 and 92 was found to increase the mitotic index of the root cells 1.2- and 1.6-fold, respectively. Treatment of seedlings with the exopolysaccharides (EPSs) of these strains increased the mitotic index 1.9-fold (P. polymyxa CCM 1465) and 2.8-fold (P. polymyxa 92). These increases indicate activation of cell division in the root meristems. Analysis of the morphometric variables of the seedlings showed that P. polymyxa CCM 1465, P. polymyxa 92, and their EPSs promoted wheat growth, increasing root and shoot length up to 22% and root and shoot dry weight up to 28%, as compared with the control. In addition, both strains were found to intensely colonize the seedling root surface. Thus, P. polymyxa EPSs are active metabolites that, along with whole cells, are responsible for the contact interactions of the bacteria with wheat roots and are implicated in the induction of plant responses to these interactions. The strains used in this work are of interest for further study to broaden the existing understanding of the mechanisms of plant–bacterial interactions and to develop effective biofertilizers for agricultural purposes.

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Optimization of the Production Parameters of a Novel Exopolysaccharide Chrysosporine from Endophytic Chrysosporium sp. KTL2, and Evaluation of its Antioxidative and Prebiotic Potentialities
Hiran Kanti Santra, Debdulal Banerjee
Indian Journal of Microbiology.2024;[Epub] CrossRef
Effect of a Bacillus velezensis and Lysinibacillus fusiformis-based biofertilizer on phosphorus acquisition and grain yield of soybean
Luciana Cristina Vitorino, Elias José da Silva, Marilene Silva Oliveira, Isabella de Oliveira Silva, Lorraine da Silva Santos, Maria Andréia Corrêa Mendonça, Thais Cristina Sousa Oliveira, Layara Alexandre Bessa
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Screening of Endophytic Antagonistic Bacteria in Wheat and Evaluation of Biocontrol Potential against Wheat Stripe Rust
Ainisai Saimi, Qiqi Zhang, Qi Liu, Guangkuo Li, Haifeng Gao, Jing Chen
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Basidiomycetes Polysaccharides Regulate Growth and Antioxidant Defense System in Wheat
Olga Tsivileva, Andrei Shaternikov, Nina Evseeva
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Exopolysaccharides of Paenibacillus polymyxa: A review
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Souad Guemouri-Athmani, Bouazza Chami, Aurelio Scavo, Nabil Touzout, Djamel Baali-Cherif, Adil Mihoub, Jakub Černý, Muhammad Farhan Saeed, Aftab Jamal, Hayi Mohamed Yassine, Yaser Hassan Dewir
Phyton.2024; 93(12): 3313. CrossRef
Evaluation of Osmotolerant Potential of Halomonas sulfidaeris MV-19 Isolated from a Mud Volcano
Ees Ahmad, Sushil K. Sharma, Abhijeet S. Kashyap, Nazia Manzar, Pramod K. Sahu, Udai B. Singh, Harsh V. Singh, Pawan K. Sharma
Current Microbiology.2023;[Epub] CrossRef
Watering Shapes a Robust and Stable Microbial Community under Fusarium Crown Rot Infection
Runlai Xu, Chenghang Du, Yutian Gao, Xiaohan Zhou, Irsa Ejaz, Jieru Guo, Kunhu Chen, Jun Ma, Yinghua Zhang, Zhimin Wang, Zhencai Sun
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Biological activity of silver nanoparticles synthesized with Paenibacillus polymyxa exopolysaccharides
Kristina V. Tregubova, Irina V. Yegorenkova, Vyacheslav S. Grinev, Alexander S. Fomin
Enzyme and Microbial Technology.2023; 164: 110174. CrossRef
Optimizing the Growth Conditions of the Selected Plant-Growth-Promoting Rhizobacteria Paenibacillus sp. MVY-024 for Industrial Scale Production
Justina Kaziūnienė, Raimonda Mažylytė, Aurimas Krasauskas, Monika Toleikienė, Audrius Gegeckas
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Fusaricidins, Polymyxins and Volatiles Produced by Paenibacillus polymyxa Strains DSM 32871 and M1
Pascal Mülner, Elisa Schwarz, Kristin Dietel, Stefanie Herfort, Jennifer Jähne, Peter Lasch, Tomislav Cernava, Gabriele Berg, Joachim Vater
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The role of Jacalin-related lectin gene AOL_s00083g511 in the development and pathogenicity of the nematophagous fungus Arthrobotrys oligospora: Xinyuan Dong , Jiali Si , Guanghui Zhang , Zhen Shen , Li Zhang , Kangliang Sheng , Jingmin Wang , Xiaowei Kong , Xiangdong Zha , Yongzhong Wang; J. Microbiol. 2021;59(8):736-745. Published online July 5, 2021; DOI: https://doi.org/10.1007/s12275-021-1029-4

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Abstract

Arthrobotrys oligospora is a model species of nematophagous fungi and has great potential for the biological control of nematode diseases. Lectin is a protein that binds to carbohydrates and their complexes with high specificity, which mediates recognition events in various physiological and pathological processes. This study aimed to investigate the role of the Jacalin-related lectin (JRL) gene, AOL_s00083g511, in A. oligospora development. Through a homology recombination approach, we obtained the AOL_s00083g511 knockout mutant strain (Δg511). Next, the biological characteristics of the Δg511 mutant strain, including growth rate, conidia germination rate, adaptation to environmental stresses, and nematocidal activity, were compared with those of the wild-type (WT) strain. The results showed that the JRL gene AOL_ s00083g511 did not affect fungal growth, conidia germination, 3D-trap formation, and the ability of A. oligospora to prey on nematodes significantly. We speculate that this phenomenon may be caused by a loss of the key β1–β2 loops in the AOL_ s00083g511-encoded JRL domain and an intrinsic genetic compensation of AOL_s00083g511 in this fungus. The growth rates of both strains on high salt or surfactant media were similar; however, in the strong oxidation medium, the growth rate of the Δg511 mutant was significantly lower than that of the WT strain, indicating that AOL_s00083g511 might play a role in oxidative stress resistance. These findings provide a basis for further analysis of the related functions of the JRL gene in A. oligospora and their potential roles in the biological control of nematodes in the future.

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Function discovery of a non-ribosomal peptide synthetase-like encoding gene in the nematode-trapping fungus Arthrobotrys oligospora
Tiantian Gu, Hengqian Lu, Huiwen Liu, Guanghui Zhang, Yongzhong Wang
Frontiers in Microbiology.2023;[Epub] CrossRef
The fucose-specific lectin gene AOL_s00054g276 affects trap formation and nematocidal activity of the nematophagous fungus Arthrobotrys oligospora
Jiali Si, Xinyuan Dong, Guanghui Zhang, Hengqian Lu, Kaijing Tang, Li Zhang, Xiaowei Kong, Kangliang Sheng, Jingmin Wang, Xiangdong Zha, Yongzhong Wang
FEMS Microbiology Letters.2022;[Epub] CrossRef
Phospholipase C (AoPLC2) regulates mycelial development, trap morphogenesis, and pathogenicity of the nematode-trapping fungus Arthrobotrys oligospora
Meihua Xie, Ni Ma, Na Bai, Meichen Zhu, Ke-Qin Zhang, Jinkui Yang
Journal of Applied Microbiology.2022; 132(3): 2144. CrossRef

The putative sensor histidine kinase VadJ coordinates development and sterigmatocystin production in Aspergillus nidulans: Yanxia Zhao , Mi-Kyung Lee , Jieyin Lim , Heungyun Moon , Hee-Soo Park , Weifa Zheng , Jae-Hyuk Yu; J. Microbiol. 2021;59(8):746-752. Published online July 5, 2021; DOI: https://doi.org/10.1007/s12275-021-1055-2

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Abstract

The VosA-VelB heterocomplex governs expression of several genes associated with fungal development and secondary metabolism. In this study, we have investigated the functions of one of the VosA-VelB-activated developmental genes vadJ in development and production of the mycotoxin sterigmatocystin in the model fungus Aspergillus nidulans. The vadJ gene is predicted to encode a 957-amino acid length protein containing a highly conserved sensor histidine kinase domain. The deletion of vosA or velB resulted in decreased mRNA levels of vadJ throughout the life cycle, suggesting that VosA and VelB are necessary for proper expression of vadJ. Nullifying vadJ led to highly restricted colony growth, lowered formation of asexual spores, and about two-fold reduction in conidial viability. Conversely, the deletion of vadJ resulted in elevated production of sexual fruiting bodies and sterigmatocystin. These suggest that VadJ is necessary for proper coordination of asexual and sexual development, and sterigmatocystin production. In accordance with this idea, the deletion of vadJ led to elevated mRNA levels of the two key sexual developmental activators esdC and nsdD. In summary, the putative sensor histidine kinase VadJ represses sexual development and sterigmatocystin production, but activates asexual development in A. nidulans.

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Velvet Family Protein FpVelB Affects Virulence in Association with Secondary Metabolism in Fusarium pseudograminearum
Yuxing Wu, Sen Han, Yajiao Wang, Qiusheng Li, Lingxiao Kong
Cells.2024; 13(11): 950. CrossRef
Involvement of LaeA and Velvet Proteins in Regulating the Production of Mycotoxins and Other Fungal Secondary Metabolites
Xuwen Hou, Liyao Liu, Dan Xu, Daowan Lai, Ligang Zhou
Journal of Fungi.2024; 10(8): 561. CrossRef
Adaptative responses of Neurospora crassa by histidine kinases upon the attack of the arthropod Sinella curviseta
Ting Lu, Xiao-meng Wang, Peng-xu Chen, Juan Xi, Han-bing Yang, Wei-fa Zheng, Yan-xia Zhao
Current Genetics.2024;[Epub] CrossRef
Implication of VelB in the development, pathogenicity, and secondary metabolism of Penicillium expansum
Nadia Tahtah, Chrystian Zetina-Serrano, Ophélie Rocher, Claire Naylies, Yannick Lippi, André El Khoury, Ali Atoui, Emilien L. Jamin, Isabelle P. Oswald, Sophie Lorber, Olivier Puel
Postharvest Biology and Technology.2023; 195: 112121. CrossRef
Regulators of the Asexual Life Cycle of Aspergillus nidulans
Ye-Eun Son, Jae-Hyuk Yu, Hee-Soo Park
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Post‐translational modifications drive secondary metabolite biosynthesis in Aspergillus: a review
Kunlong Yang, Jun Tian, Nancy P. Keller
Environmental Microbiology.2022; 24(7): 2857. CrossRef
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Xiaoyu Li, Yanxia Zhao, Heungyun Moon, Jieyin Lim, Hee-Soo Park, Zhiqiang Liu, Jae-Hyuk Yu
Cells.2022; 11(24): 3998. CrossRef

Genetic diversity and population structure of the amylolytic yeast Saccharomycopsis fibuligera associated with Baijiu fermentation in China: Ju-Wei Wang , Pei-Jie Han , Da-Yong Han , Sen Zhou , Kuan Li , Peng-Yu He , Pan Zhen , Hui-Xin Yu , Zhen-Rong Liang , Xue-Wei Wang , Feng-Yan Bai; J. Microbiol. 2021;59(8):753-762. Published online July 5, 2021; DOI: https://doi.org/10.1007/s12275-021-1115-7

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Abstract

The amylolytic yeast Saccharomycopsis fibuligera is a predominant species in starters and the early fermentation stage of Chinese liquor (Baijiu). However, the genetic diversity of the species remains largely unknown. Here we sequenced the genomes of 97 S. fibuligera strains from different Chinese Baijiu companies. The genetic diversity and population structure of the strains were analyzed based on 1,133 orthologous genes and the whole genome single nucleotide polymorphisms (SNPs). Four main lineages were recognized. One lineage contains 60 Chinese strains which are exclusively homozygous with relatively small genome sizes (18.55–18.72 Mb) and low sequence diversity. The strains clustered in the other three lineages are heterozygous with larger genomes (21.85–23.72 Mb) and higher sequence diversity. The genomes of the homozygous strains showed nearly 100% coverage with the genome of the reference strain KPH12 and the sub-genome A of the hybrid strain KJJ81 at the above 98% sequence identity level. The genomes of the heterozygous strains showed nearly 80% coverage with both the sub-genome A and the whole genome of KJJ81, suggesting that the Chinese heterozygous strains are also hybrids with nearly 20% genomes from an unidentified source. Eighty-three genes were found to show significant copy number variation between different lineages. However, remarkable lineage specific variations in glucoamylase and α-amylase activities and growth profiles in different carbon sources and under different environmental conditions were not observed, though strains exhibiting relatively high glucoamylase activity were mainly found from the homozygous lineage.

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Qi Yu, Feiyan Mou, Junwen Xiao, Cheng Zhan, Liang Li, Xu Chang, Xiaoyuan Dong, Maobin Chen, Xinrui Wang, Mei Chen, Shangling Fang
World Journal of Microbiology and Biotechnology.2024;[Epub] CrossRef
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Hongmei Yin, Qiang Hong, Xiang Yu, Hui Wang, Xiaodan Shi, Wei Liu, Tao Yuan, Zongcai Tu
Food Research International.2024; 194: 114882. CrossRef
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Boyang Xu, Shanshan Xu, Hao Zhou, Ruijuan Wang, Chao Jiang, Dongdong Mu, Xuefeng Wu, Xiaolei Wu, Shaotong Jiang, Xingjiang Li
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Exploring the Role of Active Functional Microbiota in Flavor Generation by Integrated Metatranscriptomics and Metabolomics during Niulanshan Baijiu Fermentation
Yuanyuan Pan, Ying Wang, Wenjun Hao, Sen Zhou, Chengbao Duan, Qiushi Li, Jinwang Wei, Gang Liu
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Dynamic changes and correlations of microbial communities, physicochemical properties, and volatile metabolites during Daqu fermentation of Taorong-type Baijiu
Yanbo Liu, Haideng Li, Shumei Dong, Zhou Zhou, Zhenke Zhang, Runna Huang, Suna Han, Jianguang Hou, Chunmei Pan
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Qi Zhu, Liangqiang Chen, Zheng Peng, Qiaoling Zhang, Wanqiu Huang, Fan Yang, Guocheng Du, Juan Zhang, Li Wang
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CagL polymorphisms between East Asian and Western Helicobacter pylori are associated with different abilities to induce IL-8 secretion: Yun Hui Choi , Jing Lai , Myeong-A Kim , Aeryun Kim , Jinmoon Kim , Hanfu Su , Linhu Ge , Jeong-Heon Cha; J. Microbiol. 2021;59(8):763-770. Published online June 1, 2021; DOI: https://doi.org/10.1007/s12275-021-1136-2

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Abstract

Helicobacter pylori colonizes human gastric mucosa. Its infection is associated with gastric diseases including gastric cancer. CagA is one of the most important toxins produced by H. pylori. It is related to gastric cancer which can be injected into host cells via a type IV secretion system (T4SS). CagL is a structural component of T4SS apparatus, which triggers host cell signaling pathway. It has been reported that CagL polymorphisms may influence the severity of disease development. To explore the contribution of CagL polymorphisms between East Asian and Western H. pylori in pathogenesis, cagL gene in G27 H. pylori was swapped by K74 cagL which is identical to East Asian CagL consensus sequence and by Western 26695 H. pylori, resulting in G27ΔcagL/cagLK74 and G27ΔcagL/cagL26695, respectively. Intriguingly, G27ΔcagL/ cagLK74 showed significantly less ability of IL-8 induction than G27ΔcagL/cagL26695 while displayed similar abilities of CagA phosphorylation, and cell elongation. Taken together, this study suggests that the CagL polymorphism may influence IL-8 induction, and K74 CagL has less ability to induce IL-8 secretion than G27 or 26695 CagL. Further research should address how the different capabilities of IL-8 induction between intraspecies-CagL are associated with the large differences of the incidence of gastric cancer between East Asian and Western countries.

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New CagL Amino Acid Polymorphism Patterns of Helicobacter pylori in Peptic Ulcer and Non-Ulcer Dyspepsia
Reyhan Caliskan, Silva Polat Sari, Bahadir Ercan, Kivanc Derya Peker, Mehtap Omac Sonmez, Ozer Akgul, Burcu Sapmaz, Aliye Soylu, Gokhan Tolga Adas, Yasar Ali Oner, Pelin Yuksel Mayda
Medicina.2022; 58(12): 1738. CrossRef
Geographic diversity in Helicobacter pylori oipA genotype between Korean and United States isolates
Aeryun Kim, Jing Lai, D. Scott Merrell, Ji-Hye Kim, Hanfu Su, Jeong-Heon Cha
Journal of Microbiology.2021; 59(12): 1125. CrossRef

NF-κB/ROS and ERK pathways regulate NLRP3 inflammasome activation in Listeria monocytogenes infected BV2 microglia cells: Lin Yuan , Yurong Zhu , Shuang Huang , Lin Lin , Xugan Jiang , Shengxia Chen; J. Microbiol. 2021;59(8):771-781. Published online June 1, 2021; DOI: https://doi.org/10.1007/s12275-021-0692-9

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Abstract

Listeria monocytogenes is a food-borne pathogen responsible for neurolisteriosis, which is potentially lethal in immunocompromised individuals. Microglia are the main target cells for L. monocytogenes in central nervous system (CNS). However, the precise mechanisms by which they trigger neuroinflammatory processes remain unknown. The BV2 microglial cell line and a murine model of L. monocytogenes infection were used for experiments in this study. Listeria monocytogenes induced pyroptosis and nucleotide binding and oligomerization, leucine-rich repeat, pyrin domain-containing 3 (NLRP3) inflammasome activation in BV2. Pharmacological inhibition of the NLRP3 inflammasome attenuated L. monocytogenes- induced pyroptosis. Moreover, inhibition of nuclear factor kappa-B (NF-κB) and extracellular regulated protein kinases (ERK) pathways induced a decrease in caspase1 activation and mature IL-1β-17 secretion. Our collective findings support critical involvement of the NLRP3 inflammasome in L. monocytogenes-induced neuroinflammation and, to an extent, ROS production. In addition, ERK and NF-κB signaling play an important role in activation of the NLRP3 inflammasome, both in vitro and in vivo.

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Deletion of Nox from Listeria monocytogenes Strain EGDe Enhances Bacterial Virulence and Reduces the Production of Reactive Oxygen Species and Inflammatory Factors In Vivo
Dezhi Li, Wenwen Ma, Guowei Chen, Zhiqiang Huang, Qing Liu
Foodborne Pathogens and Disease.2025; 22(3): 177. CrossRef
MAPK pathways regulated apoptosis and pyroptosis in respiratory epithelial cells of a primitive vertebrate model during bacterial infection
Zixi Song, Mingxu Jiang, Mengya Wang, Jiahong Zou, Zhenwei Chen, Feifei Zheng, Qingchao Wang
International Journal of Biological Macromolecules.2025; 286: 138587. CrossRef
NLRP12 c.1382dup promotes the development of Crohn’s disease through the ERK/NLRP3/ IL-1β pathway
Yang Huang, Lincheng Xu, Qingqing Yang, Xueyi Xiao, Zhenyu Ye, Rongqing Li, Yanyan Guan, Xudong Wu
Gene.2024; 931: 148855. CrossRef
The critical role of NLRP3 inflammasome activation in Streptococcus suis-induced blood-brain barrier disruption
Xinrui Cao, Kaixiang Jia, Qian Liu, Hang Yin, Xiaoying Yu, Xiaoxiang Hu, Chao Ye, Lianci Peng, Rendong Fang
Veterinary Microbiology.2024; 295: 110161. CrossRef
From cytokines to chemokines: Understanding inflammatory signaling in bacterial meningitis
Ahsan Ibrahim, Nida Saleem, Faiza Naseer, Sagheer Ahmed, Nayla Munawar, Rukhsana Nawaz
Molecular Immunology.2024; 173: 117. CrossRef
Reactive oxygen species trigger inflammasome activation after intracellular microbial interaction
Caio Pupin Rosa, Thiago Caetano Andrade Belo, Natália Cristina de Melo Santos, Evandro Neves Silva, Juciano Gasparotto, Patrícia Paiva Corsetti, Leonardo Augusto de Almeida
Life Sciences.2023; 331: 122076. CrossRef
NLRP3 Inflammasome’s Activation in Acute and Chronic Brain Diseases—An Update on Pathogenetic Mechanisms and Therapeutic Perspectives with Respect to Other Inflammasomes
Anna Chiarini, Li Gui, Chiara Viviani, Ubaldo Armato, Ilaria Dal Prà
Biomedicines.2023; 11(4): 999. CrossRef
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Dae-Kyum Kim, Jin-Won Huh, Hyeonseung Yu, Yeji Lee, Yongxin Jin, Un-Hwan Ha
International Journal of Molecular Sciences.2023; 24(21): 15957. CrossRef
Inflammasome activation by Gram-positive bacteria: Mechanisms of activation and regulation
A. Marijke Keestra-Gounder, Prescilla Emy Nagao
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Sodium butyrate attenuate hyperglycemia-induced inflammatory response and renal injury in diabetic mice
Man Yan, Yan-Yan Zhang, Yue Xi, Long-Kun Ding, Chang Sun, Li-Juan Qu, Xin Qian, Jing-Wen Xu, Wen Sun, Liang Wu
Acta Pharmaceutica.2023; 73(1): 121. CrossRef
TRAF6-TAK1-IKKβ pathway mediates TLR2 agonists activating “one-step” NLRP3 inflammasome in human monocytes
Mengdan Chen, Shi Yu, Yuhui Gao, Jiaxun Li, Xun Wang, Bin Wei, Guangxun Meng
Cytokine.2023; 169: 156302. CrossRef
Chrysophanol-8-O-glucoside protects mice against acute liver injury by inhibiting autophagy in hepatic stellate cells and inflammatory response in liver-resident macrophages
Tao Wang, Zhuo Lu, Xin-Hui Qu, Zi-Ying Xiong, Ya-Ting Wu, Yong Luo, Zi-Yu Zhang, Xiao-Jian Han, Cai-Feng Xie
Frontiers in Pharmacology.2022;[Epub] CrossRef
Microglia Pyroptosis: A Candidate Target for Neurological Diseases Treatment
Xian Wu, Teng Wan, Xiaoyu Gao, Mingyuan Fu, Yunfeng Duan, Xiangru Shen, Weiming Guo
Frontiers in Neuroscience.2022;[Epub] CrossRef

Incomplete autophagy promotes the replication of Mycoplasma hyopneumoniae: Zhaodi Wang† , Yukang Wen† , Bingqian Zhou , Yaqin Tian , Yaru Ning , Honglei Ding; J. Microbiol. 2021;59(8):782-792. Published online July 5, 2021; DOI: https://doi.org/10.1007/s12275-021-1232-3

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Abstract

Autophagy is an important cellular homeostatic mechanism for recycling of degradative proteins and damaged organelles. Autophagy has been shown to play an important role in cellular responses to bacteria and bacterial replication. However, the role of autophagy in Mycoplasma hyopneumoniae infection and the pathogenic mechanism is not well characterized. In this study, we showed that M. hyopneumoniae infection significantly increases the number of autophagic vacuoles in host cells. Further, we found significantly enhanced expressions of autophagy marker proteins (LC3-II, ATG5, and Beclin 1) in M. hyopneumoniae-infected cells. Moreover, immunofluorescence analysis showed colocalization of P97 protein with LC3 during M. hyopneumoniae infection. Interestingly, autophagic flux marker, p62, accumulated with the induction of infection. Conversely, the levels of p62 and LC3-II were decreased after treatment with 3-MA, inhibiting the formation of autophagosomes, during infection. In addition, accumulation of autophagosomes promoted the expression of P97 protein and the survival of M. hyopneumoniae in PK- 15 cells, as the replication of M. hyopneumoniae was downregulated by adding 3-MA. Collectively, these findings provide strong evidence that M. hyopneumoniae induces incomplete autophagy, which in turn enhances its reproduction in host cells. These findings provide novel insights into the interaction of M. hyopneumoniae and host.

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Research Progress on Immune Evasion of Mycoplasma hyopneumoniae
Bin Jiang, Ying Zhang, Gaojian Li, Yanping Quan, Jianhong Shu, Huapeng Feng, Yulong He
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Huijie Zhao, Yihan Yang, Xinya Si, Huiyang Liu, Honggang Wang
Biomolecules.2022; 12(7): 1010. CrossRef
Mycoplasma bovis inhibits autophagy in bovine mammary epithelial cells via a PTEN/PI3K-Akt-mTOR-dependent pathway
Maolin Xu, Yang Liu, Tuerdi Mayinuer, Yushan Lin, Yue Wang, Jian Gao, Dong Wang, John P. Kastelic, Bo Han
Frontiers in Microbiology.2022;[Epub] CrossRef
Incomplete autophagy promotes the proliferation of Mycoplasma hyopneumoniae through the JNK and Akt pathways in porcine alveolar macrophages
Yukang Wen, Zhengkun Chen, Yaqin Tian, Mei Yang, Qingshuang Dong, Yujiao Yang, Honglei Ding
Veterinary Research.2022;[Epub] CrossRef

Pathogenomics of Streptococcus ilei sp. nov., a newly identified pathogen ubiquitous in human microbiome: Dong-Wook Hyun , Jae-Yun Lee , Min-Soo Kim , Na-Ri Shin , Tae Woong Whon , Kyung Hyun Kim , Pil Soo Kim , Euon Jung Tak , Mi-Ja Jung , June Young Lee , Hyun Sik Kim , Woorim Kang , Hojun Sung , Che Ok Jeon , Jin-Woo Bae; J. Microbiol. 2021;59(8):793-806.; DOI: https://doi.org/10.1007/s12275-021-1165-x

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Abstract

Viridans group streptococci are a serious health concern because most of these bacteria cause life-threatening infections, especially in immunocompromised and hospitalized individuals. We focused on two alpha-hemolytic Streptococcus strains (I-G2 and I-P16) newly isolated from an ileostomy effluent of a colorectal cancer patient. We examined their pathogenic potential by investigating their prevalence in human and assessing their pathogenicity in a mouse model. We also predicted their virulence factors and pathogenic features by using comparative genomic analysis and in vitro tests. Using polyphasic and systematic approaches, we identified the isolates as belonging to a novel Streptococcus species and designated it as Streptococcus ilei. Metagenomic survey based on taxonomic assignment of datasets from the Human Microbiome Project revealed that S. ilei is present in most human population and at various body sites but is especially abundant in the oral cavity. Intraperitoneal injection of S. ilei was lethal to otherwise healthy C57BL/6J mice. Pathogenomics and in vitro assays revealed that S. ilei possesses a unique set of virulence factors. In agreement with the in vivo and in vitro data, which indicated that S. ilei strain I-G2 is more pathogenic than strain I-P16, only the former displayed the streptococcal group A antigen. We here newly identified S. ilei sp. nov., and described its prevalence in human, virulence factors, and pathogenicity. This will help to prevent S. ilei strain misidentification in the future, and improve the understanding and management of streptococcal infections.

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International Journal of Systematic and Evolutionary Microbiology .2024;[Epub] CrossRef
Description of Streptococcus dentalis sp. nov., Streptococcus gingivalis sp. nov., and Streptococcus lingualis sp. nov., Isolated from Human Oral Cavities
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Journal of Microbiology.2024; 62(11): 973. CrossRef
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