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Liver-resident NK cells suppress autoimmune cholangitis and limit the proliferation of CD4+ T cells.


ABSTRACT: Liver-resident NK cells are distinct from conventional NK cells and play an important role in the maintenance of liver homeostasis. How liver-resident NK cells participate in autoimmune cholangitis remains unclear. Here, we extensively investigated the impact of NK cells in the pathogenesis of autoimmune cholangitis utilizing the well-established dnTGF?RII cholangitis model, NK cell-deficient (Nfil3-/-) mice, adoptive transfer and in vivo antibody-mediated NK cell depletion. Our data demonstrated that disease progression was associated with a significantly reduced frequency of hepatic NK cells. Depletion of NK cells resulted in exacerbated autoimmune cholangitis in dnTGF?RII mice. We further confirmed that the DX5-CD11chi liver-resident NK cell subset colocalized with CD4+ T cells and inhibited CD4+ T cell proliferation. Gene expression microarray analysis demonstrated that liver-resident NK cells had a distinct gene expression pattern consisting of the increased expression of genes involved in negative regulatory functions in the context of the inflammatory microenvironment.

SUBMITTER: Zhao ZB 

PROVIDER: S-EPMC7000693 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature

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Liver-resident NK cells suppress autoimmune cholangitis and limit the proliferation of CD4<sup>+</sup> T cells.

Zhao Zhi-Bin ZB   Lu Fang-Ting FT   Ma Hong-Di HD   Wang Yin-Hu YH   Yang Wei W   Long Jie J   Miao Qi Q   Zhang Weici W   Tian Zhigang Z   Ridgway William M WM   Cao Jie J   Gershwin M Eric ME   Lian Zhe-Xiong ZX  

Cellular & molecular immunology 20190315 2


Liver-resident NK cells are distinct from conventional NK cells and play an important role in the maintenance of liver homeostasis. How liver-resident NK cells participate in autoimmune cholangitis remains unclear. Here, we extensively investigated the impact of NK cells in the pathogenesis of autoimmune cholangitis utilizing the well-established dnTGFβRII cholangitis model, NK cell-deficient (Nfil3<sup>-/-</sup>) mice, adoptive transfer and in vivo antibody-mediated NK cell depletion. Our data  ...[more]

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