Bacteroides salyersiae Is a Candidate Probiotic Species with Potential Anti-Colitis Properties in the Human Colon: First Evidence from an In Vivo Mouse Model

Author:

Dai Wei12,Lv Youjing1,Quan Min13,Ma Mingfeng1,Shang Qingsen123,Yu Guangli12ORCID

Affiliation:

1. Key Laboratory of Marine Drugs of Ministry of Education, Shandong Provincial Key Laboratory of Glycoscience and Glycotechnology, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, China

2. Laboratory for Marine Drugs and Bioproducts, Laoshan Laboratory, Qingdao 266237, China

3. Qingdao Marine Biomedical Research Institute, Qingdao 266071, China

Abstract

Previous studies have indicated a critical role of intestinal bacteria in the pathogenesis of ulcerative colitis (UC). B. salyersiae is a commensal species from the human gut microbiota. However, what effect it has on UC development has not been investigated. In the present study, we explored this issue and demonstrated for the first time that oral administration of B. salyersiae CSP6, a bacterium previously isolated from the fecal sample of a healthy individual, protected against dextran sulfate sodium (DSS)-induced colitis in C57BL/6J mice. In particular, B. salyersiae CSP6 improved mucosal damage and attenuated gut dysbiosis in the colon of DSS-fed mice. Specifically, B. salyersiae CSP6 decreased the population of pathogenic Escherichia-Shigella spp. and increased the abundance of probiotic Dubosiella spp. and Bifidobacterium pseudolongum. Additionally, by reshaping the colonic microbiota, B. salyersiae CSP6 remarkably increased the fecal concentrations of equol, 8-deoxylactucin, and tiglic acid, three beneficial metabolites that have been well documented to exert strong anti-inflammatory effects. Altogether, our study provides novel evidence that B. salyersiae is a candidate probiotic species with potential anti-colitis properties in the human colon, which has applications for the development of next-generation probiotics.

Funder

National Natural Science Foundation of China

Taishan Scholars Program

Natural Science Foundation of Shandong Province

Major Project of Qingdao National Laboratory for Marine Science and Technology

Fundamental Research Funds for the Central Universities

Shandong Provincial Major Science and Technology Project

Taishan Industry Leading Talent Project, and Taishan Scholar Climbing Project

Publisher

MDPI AG

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