Journal of Microbiology

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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; J. Microbiol. 2025;63(10):e2509005. Published online October 31, 2025; DOI: https://doi.org/10.71150/jm.2509005

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Abstract PDF Supplementary Material: Atopic dermatitis (AD) is a widespread inflammatory skin condition that affects the population worldwide. Given the implication of microbiota in AD pathogenesis, we investigated whether human-derived Lactobacillus strains could modulate AD. In this study, we identified Lactobacillus crispatus KBL693 as a probiotic candidate for AD treatment. In vitro, KBL693 suppressed mast cell degranulation and IL-4 production by T cells, suggesting its ability to attenuate key type 2 immune responses. Consistent outcomes were observed in a murine AD model, where oral administration of KBL693 alleviated disease symptoms and reduced hallmark type 2 immune markers, including plasma IgE as well as IL-4, IL-5, and IL-13 levels in skin lesions. In addition to downregulating these AD-associated immune responses, KBL693 promoted regulatory T cell (Treg) expansion in mesenteric lymph nodes, indicating its potential to restore immune balance. Collectively, these findings highlight the therapeutic potential of KBL693 for AD through enhancement of Tregs and suppression of type 2 immune responses.

Review

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.

Citations

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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

Research Article

Synbiotic combination of fructooligosaccharides and probiotics ameliorates the metabolic dysfunction-associated steatotic liver disease: Sang Yoon Lee, Su-Been Lee, Goo-Hyun Kwon, Seol Hee Song, Jeong Ha Park, Min Ju Kim, Jung A Eom, Kyeong Jin Lee, Sang Jun Yoon, Hyunjoon Park, Sung-Min Won, Jin-Ju Jeong, Ki-Kwang Oh, Young Lim Ham, Gwang Ho Baik, Dong Joon Kim, Satya Priya Sharma, Ki Tae Suk; J. Microbiol. 2025;63(2):e2411002. Published online February 27, 2025; DOI: https://doi.org/10.71150/jm.2411002

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