HIF-1 in T cells ameliorated dextran sodium sulfate-induced murine colitis

Masaaki Higashiyama, Ryota Hokari, Hideaki Hozumi, Chie Kurihara, Toshihide Ueda, Chikako Watanabe, Kengo Tomita, Mitsuyasu Nakamura, Shunsuke Komoto, Yoshikiyo Okada, Atsushi Kawaguchi, Shigeaki Nagao, Makoto Suematsu, Nobuhito Goda, Soichiro Miura

研究成果: Article査読

43 被引用数 (Scopus)

抄録

HIF-1 is active in hypoxia, such as inflamed mucosa, and HIF-1 in epithelium has been reported to control inflamed mucosa in IBD models. Although T cells play an important role for pathogenesis of IBD, the function of HIF-1 in T cells remains to be elucidated. We aimed to clarify the function of HIF-1 in T cells in IBD with focus on the balance between Treg and Teff. Double immunohistochemistry of colonic mucosa in IBD patients showed that HIF-1 was expressed in T cells infiltrating the inflamed mucosa, suggesting that HIF-1 in T cells is involved in the pathogenesis. DSS administration to T cell-specific HIF-1α KO mice showed more severe colonic inflammation than control mice with the up-regulation of Th1 and Th17. Hypoxic stimulation in vitro increased Treg activation in WT T cells but not in HIF-1-deleted T cells. In contrast, hypoxic stimulation increased Th17 activation, and the degree was higher in HIF-1-deleted cells than in control cells. These results show that hypoxia controls intestinal inflammation by regulating cytokine balance in a HIF-1-dependent manner, suggesting that strengthening HIF-1 induction in T cells at the sites of inflammation might be a therapeutic strategy for IBD regulation.

本文言語English
ページ(範囲)901-909
ページ数9
ジャーナルJournal of Leukocyte Biology
91
6
DOI
出版ステータスPublished - 2012 6月

ASJC Scopus subject areas

  • 免疫アレルギー学
  • 免疫学
  • 細胞生物学

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