美國喬治亞州立大學Andrew T. Gewirtz課題組發現分段絲狀細菌可預防和治療輪狀病毒感染。這一研究成果2019年10月10日在線發表在國際學術期刊《細胞》上。
儘管清除輪狀病毒(RV)通常需要適應性免疫,但研究者無意間構建了RV抵抗性免疫缺陷小鼠,研究人員推測這反映某些微生物可以針對性抵抗RV。並且,這種RV抵抗性可通過共宿和糞便移植來傳播。
通過加熱,過濾和抗菌劑來處理保護RV的微生物菌群,然後將稀釋的處理過的微生物群轉移到無菌小鼠體內並進行微生物組分析。
這種方法表明分段的絲狀細菌(SFB)足以保護小鼠免受RV感染和相關的腹瀉。這種保護與先前定義的RV阻抗因素無關,包括幹擾素、IL-17和IL-22。SFB在迴腸的定植誘導宿主基因表達的變化,並加速上皮細胞更新。
在體外,將RV與含有SFB的糞便一起孵育可降低RV的感染性,表明RV可被直接中和。因此,不受免疫細胞的影響,SFB可針對某些腸道病毒感染和相關的腹瀉病提供保護。
據介紹,輪狀病毒(RV)在各種微生物包圍中接觸腸道上皮細胞,從而提供了微生物影響RV感染的可能性。
相關論文信息:
https://www.cell.com/cell/fulltext/S0092-8674(19)31079-7
附:英文原文
Title: Segmented Filamentous Bacteria Prevent and Cure Rotavirus Infection
Author: Zhenda Shi, Jun Zou, Zhan Zhang, Xu Zhao, Juan Noriega, Benyue Zhang, Chunyu Zhao, Harshad Ingle, Kyle Bittinger, Lisa M. Mattei, Andrea J. Pruijssers, Richard K. Plemper, Timothy J. Nice, Megan T. Baldridge, Terence S. Dermody, Benoit Chassaing, Andrew T. Gewirtz
Issue&Volume: 10 October 2019
Abstract:
Rotavirus (RV) encounters intestinal epithelial cells amidst diverse microbiota, opening possibilities of microbes influencing RV infection. Although RV clearance typically requires adaptive immunity, we unintentionally generated RV-resistant immunodeficient mice, which, we hypothesized, reflected select microbes protecting against RV. Accordingly, such RV resistance was transferred by co-housing and fecal transplant. RV-protecting microbiota were interrogated by heat, filtration, and antimicrobial agents, followed by limiting dilution transplant to germ-free mice and microbiome analysis. This approach revealed that segmented filamentous bacteria (SFB) were sufficient to protect mice against RV infection and associated diarrhea. Such protection was independent of previously defined RV-impeding factors, including interferon, IL-17, and IL-22. Colonization of the ileum by SFB induced changes in host gene expression and accelerated epithelial cell turnover. Incubation of RV with SFB-containing feces reduced infectivity in vitro, suggesting direct neutralization of RV. Thus, independent of immune cells, SFB confer protection against certain enteric viral infections and associated diarrheal disease.
DOI: 10.1016/j.cell.2019.09.028
Source:https://www.cell.com/cell/fulltext/S0092-8674(19)31079-7
期刊信息
Cell:《細胞》,創刊於1974年。隸屬於細胞出版社,最新IF:36.216
官方網址:https://www.cell.com/
投稿連結:https://www.editorialmanager.com/cell/default.aspx
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