Alterations in the mucosa-associated fungal microbiota in patients with ulcerative colitis

文献类型: 外文期刊

第一作者: Qiu, Xinyun

作者: Qiu, Xinyun;Ma, Jingjing;Jiao, Chunhua;Mao, Xiaqiong;Zhao, Xiaojing;Lu, Meijiao;Zhang, Hongjie;Wang, Kai

作者机构:

关键词: ulcerative colitis;intestinal fungi;mucosal-associated microbiota;mucosal inflammation;high-throughput sequencing

期刊名称:ONCOTARGET ( 影响因子:5.168; 五年影响因子:5.312 )

ISSN: 1949-2553

年卷期: 2017 年 8 卷 64 期

页码:

收录情况: SCI

摘要: Background: Fungi colonize the human gut and might play a key role in the pathogenesis of ulcerative colitis (UC). However, studies on the fungal composition in the gut (especially adhering to the intestinal mucosa) of UC patients is limited. Results: The number of fungi decreased significantly in inflamed mucosa compared with that in HS mucosa. Fifteen major genera were examined, among which Wickerhamomyces, unidentified genus of Saccharomycetales, Aspergillus, Sterigmatomyces, and Candida showed increasing trends, whereas Exophiala, Alternaria, Emericella, Epicoccum, Acremonium, Trametes, and Penicillium showed decreasing trends in UC patients compared to the HS. The pro-inflammatory cytokines (IL-I beta, TNF-alpha, INF-gamma, IL-6, IL-17A, and IL-23) were up-regulated in the UC group. The genera Wickerhamomyces, Nigrospora, and Penicillium were positively correlated, while Sporobolomyces and Trametes were negatively correlated with the expression of several colonic pro-inflammatory cytokines and the Baron and/or Mayo score. Conclusions: Our study confirms the alteration of the colonic fungal microbiota in the UC patients, which might be associated with mucosal inflammation and pathogenesis of UC. Further studies need to identify the roles of different intestinal fungi in detail, and to determine the mechanism of the host-fungal interaction underlying the development of UC. Methods: Mucosal samples of inflamed descending colon from 14 active UC patients and 15 healthy subjects (HS) were analyzed by high-throughput sequencing to compare the fungal microbiota. The expressions of pro-inflammatory cytokines (IL-I beta, TNF-alpha, INF-gamma, IL-6, IL-17A, and IL-23) in intestinal mucosal tissues were examined. The Baron and Mayo scores of UC patients were evaluated, and the correlation between intestinal fungal composition and intestinal inflammatory status was analyzed.

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