Journal of Microbiology

Journal Articles

Gut Lactobacillus and Probiotics Lactobacillus lactis/rhamnosis Ameliorate Liver Fibrosis in Prevention and Treatment: Sung Min Won , Na Young Lee , Ki&# , Haripriya Gupta , Satya Priya Sharma , Kyung Hwan Kim , Byoung Kook Kim , Hyun Chae Joung , Jin Ju Jeong , Raja Ganesan , Sang Hak Han , Sang Jun Yoon , Dong Joon Kim , Ki Tae Suk; J. Microbiol. 2023;61(2):245-257. Published online February 6, 2023; DOI: https://doi.org/10.1007/s12275-023-00014-y

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The progression and exacerbation of liver fibrosis are closely related to the gut microbiome. It is hypothesized that some probiotics may slow the progression of liver fibrosis. In human stool analysis [healthy group (n = 44) and cirrhosis group (n = 18)], difference in Lactobacillus genus between healthy group and cirrhosis group was observed. Based on human data, preventive and therapeutic effect of probiotics Lactobacillus lactis and L. rhamnosus was evaluated by using four mice fibrosis models. L. lactis and L. rhamnosus were supplied to 3,5-diethoxycarbonyl-1,4-dihydrocollidine or carbon tetrachloride-induced liver fibrosis C57BL/6 mouse model. Serum biochemical measurements, tissue staining, and mRNA expression in the liver were evaluated. The microbiome was analyzed in mouse cecal contents. In the mouse model, the effects of Lactobacillus in preventing and treating liver fibrosis were different for each microbe species. In case of L. lactis, all models showed preventive and therapeutic effects against liver fibrosis. In microbiome analysis in mouse models administered Lactobacillus, migration and changes in the ratio and composition of the gut microbial community were confirmed. L. lactis and L. rhamnosus showed preventive and therapeutic effects on the progression of liver fibrosis, suggesting that Lactobacillus intake may be a useful strategy for prevention and treatment.

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Dingkang Wang, Ruijie Xu, Sha Liu, Xiaomin Sun, Tianxiao Zhang, Lin Shi, Youfa Wang
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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
Journal of Microbiology.2024; 62(10): 907. CrossRef
Probiotics modulation of the endotoxemic effect on the gut and liver of the lipopolysaccharide challenged mice
Gyan Babu, Banalata Mohanty
Drug and Chemical Toxicology.2024; : 1. CrossRef
Research reviews and prospects of gut microbiota in liver cirrhosis: a bibliometric analysis (2001–2023)
Xiaofei Zhu, Ziyuan Zhou, Xiaxia Pan
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Xue Li, Xinyi Xu, Sian Tao, Yue Su, Li Wen, Dong Wang, Jibin Liu, Quansheng Feng
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Assessment of probiotic properties of lactic acid bacteria isolated from an artisanal Colombian cheese
Samantha Roldán-Pérez, Sara Lucía Gómez Rodríguez, José Uriel Sepúlveda-Valencia, Orlando Simón Ruiz Villadiego, María Elena Márquez Fernández, Olga I. Montoya Campuzano, Mónica María Durango-Zuleta
Heliyon.2023; 9(11): e21558. CrossRef
Agrocybe aegerita Polysaccharide Combined with Bifidobacterium lactis Bb-12 Attenuates Aging-Related Oxidative Stress and Restores Gut Microbiota
Xiaoyan Liu, Yanyu Feng, Hongmin Zhen, Lina Zhao, Hongqiang Wu, Bin Liu, Guangsen Fan, Aijun Tong
Foods.2023; 12(24): 4381. CrossRef
Probiotics and liver fibrosis: An evidence-based review of the latest research
Lin Cheng, Jianyou Shi, Haoyuan Peng, Rongsheng Tong, Yonghe Hu, Dongke Yu
Journal of Functional Foods.2023; 109: 105773. CrossRef

Carbohydrate-binding specificities of potential probiotic Lactobacillus strains in porcine jejunal (IPEC-J2) cells and porcine mucin: Valerie Diane Valeriano , Bernadette B. Bagon , Marilen P. Balolong , Dae-Kyung Kang; J. Microbiol. 2016;54(7):510-519. Published online June 28, 2016; DOI: https://doi.org/10.1007/s12275-016-6168-7

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Abstract

Bacterial lectins are carbohydrate-binding adhesins that recognize glycoreceptors in the gut mucus and epithelium of hosts. In this study, the contribution of lectin-like activities to adhesion of Lactobacillus mucosae LM1 and Lactobacillus johnsonii PF01, which were isolated from swine intestine, were compared to those of the commercial probiotic Lactobacillus rhamnosus GG. Both LM1 and PF01 strains have been reported to have good adhesion ability to crude intestinal mucus of pigs. To confirm this, we quantified their adhesion to porcine gastric mucin and intestinal porcine enterocytes isolated from the jejunum of piglets (IPEC-J2). In addition, we examined their carbohydrate-binding specificities by suspending bacterial cells in carbohydrate solutions prior to adhesion assays. We found that the selected carbohydrates affected the adherences of LM1 to IPEC-J2 cells and of LGG to mucin. In addition, compared to adhesion to IPEC-J2 cells, adhesion to mucin by both LM1 and LGG was characterized by enhanced specific recognition of glycoreceptor components such as galactose, mannose, and N-acetylglucosamine. Hydrophobic interactions might make a greater contribution to adhesion of PF01. A similar adhesin profile between a probiotic and a pathogen, suggest a correlation between shared pathogen–probiotic glycoreceptor recognition and the ability to exclude enteropathogens such as Escherichia coli K88 and Salmonella Typhimurium KCCM 40253. These findings extend our understanding of the mechanisms of the intestinal adhesion and pathogen-inhibition abilities of probiotic Lactobacillus strains.

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The Effects of Cellular Membrane Damage on the Long-Term Storage and Adhesion of Probiotic Bacteria in Caco-2 Cell Line
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Exoproteome Perspective on the Bile Stress Response of Lactobacillus johnsonii
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Exploring the Bile Stress Response of Lactobacillus mucosae LM1 through Exoproteome Analysis
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Research Support, Non-U.S. Gov't

Identification of Porcine Endogenous Retrovirus (PERV) packaging sequence and development of PERV packaging viral vector system: Jiwon Choi , Hoon-mi Kim , Jong Kwang Yoon , Yeondong Cho , Hee-Jung Lee , Kang Chang Kim , Chang-Kyu Kim , Gye-Woong Kim , Young Bong Kim; J. Microbiol. 2015;53(5):348-353. Published online May 3, 2015; DOI: https://doi.org/10.1007/s12275-015-5134-0

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Abstract

Studies of the retroviruses have focused on the specific interaction of the nucleocapsid protein with a packaging signal in the viral RNA as important for this selectivity, but the packaging signal in porcine endogenous retrovirus (PERV) has not been defined. Herein, we identified and analyzed this packaging signal in PERV and found hairpin structures with conserved tetranucleotides in their loops and nucleocapsid recognition sequences; both of which are key elements in the viral packaging signal of MLV. We evaluated packaging efficiency of sequence variants isolated from viral and proviral integrated genomes. All viral packaging sequences (Ψ) were identical, while five distinct packaging sequences were identified from proviral sources. One proviral sequence (Ψ1) was identical to that of the viral Ψ and had the highest packaging efficiency. Three variants (Ψ2, Ψ3, Ψ4) maintained key elements of the viral packaging signal, but had nucleotide replacements and consequently demonstrated reduced packaging efficiency. Despite of the same overall hairpin structure, the proviral variant (Ψ5) had only one GACG sequence in the hairpin loop and showed the lowest packaging efficiency other than ΔΨ, in which the essential packaging sequence was removed. This result, thus, defined the packaging sequences in PERV and emphasized the importance of nucleotide sequence and RNA structure in the determination of packaging efficiency. In addition, we demonstrate efficient infection and gene expression from the PERVbased viral vector, which may serve as a novel alternative to current retroviral expression systems.

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Porcine Endogenous Retrovirus (PERV) – Molecular Structure and Replication Strategy in the Context of Retroviral Infection Risk of Human Cells
Krzysztof Łopata, Emilia Wojdas, Roman Nowak, Paweł Łopata, Urszula Mazurek
Frontiers in Microbiology.2018;[Epub] CrossRef

Review

MINIREVIEW] Overview: Replication of Porcine Reproductive and Respiratory Syndrome Virus: Sang-Im Yun , Young-Min Lee; J. Microbiol. 2013;51(6):711-723. Published online December 19, 2013; DOI: https://doi.org/10.1007/s12275-013-3431-z

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Abstract

Porcine reproductive and respiratory syndrome virus (PRRSV), an arterivirus that causes significant losses in the pig industry, is one of the most important animal pathogens of global significance. Since the discovery of the virus, significant progress has been made in understanding its epidemiology and transmission, but no adequate control measures are yet available to eliminate infection with this pathogen. The genome replication of PRRSV is required to reproduce, within a few hours of infection, the millions of progeny virions that establish, disseminate, and maintain infection. Replication of the viral RNA genome is a multistep process involving a replication complex that is formed not only from components of viral and cellular origin but also from the viral genomic RNA template; this replication complex is embedded within particular virus-induced membrane vesicles. PRRSV RNA replication is directed by at least 14 replicase proteins that have both common enzymatic activities, including viral RNA polymerase, and also unusual and poorly understood RNAprocessing functions. In this review, we summarize our current understanding of PRRSV replication, which is important for developing a successful strategy for the prevention and control of this pathogen.

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Ying Liu, Feng-Xue Wang, Yong-Jun Wen, Zhen-Guang Li, Xing Liu, Na Sun, Yong Yang, Shu-Qin Zhang, Hong-Wei Zhu, Shi-Peng Cheng, Hua Wu
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Research Support, Non-U.S. Gov'ts

NOTE] Molecular Characterization of Two Strains of Porcine Group C Rotavirus: Sung-Geun Lee , Soo-Hyun Youn , Mi-Hwa Oh , Ok-Jae Rhee , Sangsuk Oh , Soon-Young Paik; J. Microbiol. 2011;49(6):1058-1062. Published online December 28, 2011; DOI: https://doi.org/10.1007/s12275-011-1088-z

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Abstract: Group C rotaviruses are an important cause of acute gastroenteritis in humans and animals. Fecal samples were collected from a porcine herd in July, 2009. Group C rotavirus RNA was detected using RT-PCR for the VP6 gene. The identified strain was further characterized by sequencing and phylogenetic analysis of the partial VP4, and complete VP6 and VP7 gene sequences. The partial VP4 and complete VP6 gene sequences of the CUK-5 strain were most closely related to those of the CUK-6 strain of group C rotaviruses. Phylogenetic analysis of the VP7 gene of the 2 strains (CUK-5 and CUK-6) and reference strains of group G rotavirus by the neighbor-joining method also confirmed that CUK-5 and CUK-6 belonged to type G5 and G1 strains, respectively. This study provides useful data for the prediction of newly appearing variants of porcine group C rotaviruses in neighboring countries through comparisons with GCRVs and fundamental research for vaccine development.

Packaging of Porcine Reproductive and Respiratory Syndrome Virus Replicon RNA by a Stable Cell Line Expressing Its Nucleocapsid Protein: Byung-Hak Song , Jeong-Min Kim , Jin-Kyoung Kim , Han-Saem Jang , Gil-Nam Yun , Eun-Jin Choi , Jae-Young Song , Sang-Im Yun , Young-Min Lee; J. Microbiol. 2011;49(3):516-523. Published online June 30, 2011; DOI: https://doi.org/10.1007/s12275-011-1280-1

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Abstract: Porcine reproductive and respiratory syndrome virus (PRRSV), a member of the Arteriviridae family, is one of the most common and economically important swine pathogens. Although both live-attenuated and killed-inactivated vaccines against the virus have been available for a decade, PRRSV is still a major problem in the swine industry worldwide. To explore the possibility of producing single-round infectious PRRSV replicon particles as a potential vaccine strategy, we have now generated two necessary components: 1) a stable cell line (BHK/Sinrep19/PRRSV-N) that constitutively expresses the viral nucleocapsid (N) protein localized to the cytoplasm and the nucleolus and 2) a PRRSV replicon vector (pBAC/PRRSV/Replicon-ΔN) with a 177-nucleotide deletion, removing the 3′-half portion of ORF7 in the viral genome, from which the self-replicating propagation-defective replicon RNAs were synthesized in vitro by SP6 polymerase run-off transcription. Transfection of this replicon RNA into N protein-expressing BHK-21 cells led to the secretion of infectious particles that packaged the replicon RNA, albeit with a low production efficiency of 0.4×102 to 1.1×102 infectious units/ml; the produced particles had only single-round infectivity with no cell-to-cell spread. This trans-complementation system for PRRSV provides a useful platform for studies to define the packaging signals and motifs present within the viral genome and N protein, respectively, and to develop viral replicon-based antiviral vaccines that will stop the infection and spread of this pathogen.

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