Comparison of the microbial community structure between inflamed and non-inflamed sites in patients with ulcerative colitis - PubMed (original) (raw)

doi: 10.1111/jgh.14129. Online ahead of print.

Junji Umeno 1, Yasuharu Okamoto 1, Hiroki Shibata 2, Yoshitoshi Ogura 3, Tomohiko Moriyama 1, Takehiro Torisu 1, Shin Fujioka 1, Yuta Fuyuno 1, Yutaka Kawarabayasi 4, Takayuki Matsumoto 5, Takanari Kitazono 1, Motohiro Esaki 1

Affiliations

Comparison of the microbial community structure between inflamed and non-inflamed sites in patients with ulcerative colitis

Atsushi Hirano et al. J Gastroenterol Hepatol. 2018.

Abstract

Background and aim: The gut microbiota is suggested to play an important role in the pathogenesis of ulcerative colitis (UC). However, interindividual and spatial variations hamper the identification of UC-related changes. We thus investigated paired mucosa-associated microbiota obtained from both inflamed and non-inflamed sites of UC patients and corresponding sites of non-inflammatory bowel disease (IBD) controls.

Methods: Mucosal biopsies of both inflamed and non-inflamed sites were obtained from 14 patients with active UC of the left-sided or proctitis type. Paired mucosal biopsies of the corresponding sites were obtained from 14 non-IBD controls. The microbial community structure was investigated using 16S ribosomal RNA gene sequences, followed by data analysis using qiime and LEfSe softwares.

Results: Microbial alpha diversity in both inflamed and non-inflamed sites was significantly lower in UC patients compared with non-IBD controls. There were more microbes of the genus Cloacibacterium and the Tissierellaceae family, and there were less microbes of the genus Neisseria at the inflamed site when compared with the non-inflamed site in UC patients. Decreased abundance of the genera Prevotella, Eubacterium, Neisseria, Leptotrichia, Bilophila, Desulfovibrio, and Butyricimonas was evident at the inflamed site of UC patients compared with the corresponding site of non-IBD controls. Among these taxa, the genera Prevotella and Butyricimonas were also less abundant at the non-inflamed site of UC patients compared with the corresponding site in non-IBD controls.

Conclusions: Mucosal microbial dysbiosis occurs at both inflamed and non-inflamed sites in UC patients. The taxa showing altered abundance in UC patients might mediate colonic inflammation.

Keywords: 16S rRNA gene sequence; dysbiosis; mucosal microbiota; ulcerative colitis.

© 2018 Journal of Gastroenterology and Hepatology Foundation and John Wiley & Sons Australia, Ltd.

PubMed Disclaimer

Similar articles

Cited by

LinkOut - more resources