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An inducible circular RNA circKcnt2 inhibits ILC3 activation to facilitate colitis resolution.


ABSTRACT: Group 3 innate lymphoid cells (ILC3) are an important regulator for immunity, inflammation and tissue homeostasis in the intestine, but how ILC3 activation is regulated remains elusive. Here we identify a new circular RNA (circRNA) circKcnt2 that is induced in ILC3s during intestinal inflammation. Deletion of circKcnt2 causes gut ILC3 activation and severe colitis in mice. Mechanistically, circKcnt2, as a nuclear circRNA, recruits the nucleosome remodeling deacetylase (NuRD) complex onto Batf promoter to inhibit Batf expression; this in turn suppresses Il17 expression and thereby ILC3 inactivation to promote innate colitis resolution. Furthermore, Mbd3-/-Rag1-/- and circKcnt2-/-Rag1-/- mice develop severe innate colitis following dextran sodium sulfate (DSS) treatments, while simultaneous deletion of Batf promotes colitis resolution. In summary, our data support a function of the circRNA circKcnt2 in regulating ILC3 inactivation and resolution of innate colitis.

SUBMITTER: Liu B 

PROVIDER: S-EPMC7427797 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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An inducible circular RNA circKcnt2 inhibits ILC3 activation to facilitate colitis resolution.

Liu Benyu B   Ye Buqing B   Zhu Xiaoxiao X   Yang Liuliu L   Li Huimu H   Liu Nian N   Zhu Pingping P   Lu Tiankun T   He Luyun L   Tian Yong Y   Fan Zusen Z  

Nature communications 20200814 1


Group 3 innate lymphoid cells (ILC3) are an important regulator for immunity, inflammation and tissue homeostasis in the intestine, but how ILC3 activation is regulated remains elusive. Here we identify a new circular RNA (circRNA) circKcnt2 that is induced in ILC3s during intestinal inflammation. Deletion of circKcnt2 causes gut ILC3 activation and severe colitis in mice. Mechanistically, circKcnt2, as a nuclear circRNA, recruits the nucleosome remodeling deacetylase (NuRD) complex onto Batf pr  ...[more]

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