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论文题目: PHD3 Stabilizes the Tight Junction Protein Occludin and Protects Intestinal Epithelial Barrier Function
英文论文题目: PHD3 Stabilizes the Tight Junction Protein Occludin and Protects Intestinal Epithelial Barrier Function
第一作者: Chen, Y; Zhang, HS; Fong, GH; Xi, QL; Wu, GH; Bai, CG; Ling, ZQ; Fan, L; Xu, YM; Qin, YQ; Yuan, TL; Sun, H; Fang, J
英文第一作者: Chen, Y; Zhang, HS; Fong, GH; Xi, QL; Wu, GH; Bai, CG; Ling, ZQ; Fan, L; Xu, YM; Qin, YQ; Yuan, TL; Sun, H; Fang, J
联系作者: Fang, J (reprint author), Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Nutr Sci, Lab Food Safety Res, Shanghai 200031, Peoples R China.
英文联系作者: Fang, J (reprint author), Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Nutr Sci, Lab Food Safety Res, Shanghai 200031, Peoples R China.
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发表年度: 2015
卷: 290
期: 33
页码: 20580-20589
摘要: Prolyl hydroxylase domain proteins (PHDs) control cellular adaptation to hypoxia. PHDs are found involved in inflammatory bowel disease (IBD); however, the exact role of PHD3, a member of the PHD family, in IBD remains unknown. We show here that PHD3 plays a critical role in maintaining intestinal epithelial barrier function. We found that genetic ablation of Phd3 in intestinal epithelial cells led to spontaneous colitis in mice. Deletion of PHD3 decreases the level of tight junction protein occludin, leading to a failure of intestinal epithelial barrier function. Further studies indicate that PHD3 stabilizes occludin by preventing the interaction between the E3 ligase Itch and occludin, in a hydroxylase-independent manner. Examination of biopsy of human ulcerative colitis patients indicates that PHD3 is decreased with disease severity, indicating that PHD3 down-regulation is associated with progression of this disease. We show that PHD3 protects intestinal epithelial barrier function and reveal a hydroxylase-independent function of PHD3 in stabilizing occludin. These findings may help open avenues for developing a therapeutic strategy for IBD.
英文摘要: Prolyl hydroxylase domain proteins (PHDs) control cellular adaptation to hypoxia. PHDs are found involved in inflammatory bowel disease (IBD); however, the exact role of PHD3, a member of the PHD family, in IBD remains unknown. We show here that PHD3 plays a critical role in maintaining intestinal epithelial barrier function. We found that genetic ablation of Phd3 in intestinal epithelial cells led to spontaneous colitis in mice. Deletion of PHD3 decreases the level of tight junction protein occludin, leading to a failure of intestinal epithelial barrier function. Further studies indicate that PHD3 stabilizes occludin by preventing the interaction between the E3 ligase Itch and occludin, in a hydroxylase-independent manner. Examination of biopsy of human ulcerative colitis patients indicates that PHD3 is decreased with disease severity, indicating that PHD3 down-regulation is associated with progression of this disease. We show that PHD3 protects intestinal epithelial barrier function and reveal a hydroxylase-independent function of PHD3 in stabilizing occludin. These findings may help open avenues for developing a therapeutic strategy for IBD.
刊物名称: JOURNAL OF BIOLOGICAL CHEMISTRY
英文刊物名称: JOURNAL OF BIOLOGICAL CHEMISTRY
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学科: Biochemistry & Molecular Biology
英文学科: Biochemistry & Molecular Biology
影响因子: 4.573
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论文类别: Article
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