Gallbladder-derived surfactant protein D regulates gut commensal bacteria for maintaining intestinal homeostasis

Hana Sarashina-Kida, Hideo Negishi, Junko Nishio, Wataru Suda, Yuki Nakajima, Mika Yasui-Kato, Keiko Iwaisako, Sujin Kang, Nobuyasu Endo, Hideyuki Yanai, Masataka Asagiri, Hiroshi Kida, Masahira Hattori, Atsushi Kumanogoh, Tadatsugu Taniguchi*

*この研究の対応する著者

    研究成果: Article査読

    25 被引用数 (Scopus)

    抄録

    The commensal microbiota within the gastrointestinal tract is essential in maintaining homeostasis. Indeed, dysregulation in the repertoire of microbiota can result in the development of intestinal immune–inflammatory diseases. Further, this immune regulation by gut microbiota is important systemically, impacting health and disease of organ systems beyond the local environment of the gut. What has not been explored is how distant organs might in turn shape the microbiota via microbe-targeted molecules. Here, we provide evidence that surfactant protein D (SP-D) synthesized in the gallbladder and delivered into intestinal lumen binds selectively to species of gut commensal bacteria. SP-D–deficient mice manifest intestinal dysbiosis and show a susceptibility to dextran sulfate sodium-induced colitis. Further, fecal transfer from SP-D–deficient mice to wild-type, germ-free mice conveyed colitis susceptibility. Interestingly, colitis caused a notable increase in Sftpd gene expression in the gallbladder, but not in the lung, via the activity of glucocorticoids produced in the liver. These findings describe a unique mechanism of interorgan regulation of intestinal immune homeostasis by SP-D with potential clinical implications such as cholecystectomy.

    本文言語English
    ページ(範囲)10178-10183
    ページ数6
    ジャーナルProceedings of the National Academy of Sciences of the United States of America
    114
    38
    DOI
    出版ステータスPublished - 2017 9月 19

    ASJC Scopus subject areas

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