JBC:FGF21可能缓解内质网应激诱导的脂肪肝中的作用

2014-12-11 MedSci MedSci原创

The Journal of Biological Chemistry发表了中国科学院上海生命科学研究院营养科学研究所刘勇研究组与上海交通大学附属第六人民医院贾伟平研究组的最新合作研究:Fibroblast Growth Factor 21 Is Regulated by the IRE1α-XBP1 Branch of the Unfolded Protein Response an

The Journal of Biological Chemistry发表了中国科学院上海生命科学研究院营养科学研究所刘勇研究组与上海交通大学附属第六人民医院贾伟平研究组的最新合作研究:Fibroblast Growth Factor 21 Is Regulated by the IRE1α-XBP1 Branch of the Unfolded Protein Response and Counteracts Endoplasmic Reticulum Stress-induced Hepatic Steatosis。此项工作揭示了内质网应激信号通路对成纤维细胞生长因子21(FGF21)的转录调节,而FGF21能够缓解内质网应激引发的脂肪肝发生。 

FGF21是主要由肝脏分泌的细胞因子,在机体糖脂代谢平衡中具有关键的调节功能。内质网应激则是代谢性疾病发生发展的重要病理机制之一。为了探索FGF21在应对内质网应激、改善脂代谢紊乱方面的潜在作用及机制,贾伟平研究组博士研究生姜杉和刘勇组博士研究生闫诚等利用非酒精性脂肪肝的动物模型和临床样本,发现脂肪肝的发生伴随着内质网应激导致的未折叠蛋白响应激活与FGF21表达水平的上升。进一步研究显示,内质网应激可以直接诱导小鼠脂肪肝的发生,并激活未折叠蛋白响应通路与FGF21的表达;而感应内质网应激的IRE1α-XBP1信号通路可以在转录水平上直接调节FGF21。此外,FGF21重组蛋白能够抑制内质网应激相关的eIF2α-ATF4-CHOP 通路,并缓解内质网应激诱导的脂肪肝发生。这些结果表明,FGF21作为未折叠蛋白响应的“效应器”,在缓解内质网应激引发的脂代谢紊乱中扮演十分重要的角色。该研究结果也被JBC 杂志选为“Paper of the Week”。 项研究得到国家科技部、国家自然科学基金委等部门的基金支持。

 

FGF21受IRE1α通路调节并缓解内质网应激诱发的脂肪肝发生

原始出处:

Jiang S, Yan C, Fang QC, Shao ML, Zhang YL, Liu Y, Deng YP, Shan B, Liu JQ, Li HT, Yang L, Zhou J, Dai Z, Liu Y, Jia WP.Fibroblast Growth Factor 21 Is Regulated by the IRE1α-XBP1 Branch of the Unfolded Protein Response and Counteracts Endoplasmic Reticulum Stress-induced Hepatic Steatosis. J Biol Chem. 2014 Oct 24;289(43):29751-65

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    2015-04-11 x35042875

    他们的研究数据表明增加肠道中肠促胰素分泌细胞的数目,有可能成为改善血糖代谢的新型治疗方案。

    0

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    2015-06-24 lily1616
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    2014-12-13 zhty5339

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