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The unfolded protein response regulator ATF6 promotes mesodermal differentiation

机译:展开的蛋白反应调节剂ATF6促进了中胚层分化

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摘要

ATF6 encodes a transcription factor that is anchored in the endoplasmic reticulum (ER) and activated during the unfolded protein response (UPR) to protect cells from ER stress. Deletion of the isoform activating transcription factor 6 alpha (ATF6 alpha) and its paralog ATF6 beta results in embryonic lethality and notochord dysgenesis in nonhuman vertebrates, and loss-of-function mutations in ATF6 alpha are associated with malformed neuroretina and congenital vision loss in humans. These phenotypes implicate an essential role for ATF6 during vertebrate development. We investigated this hypothesis using human stem cells undergoing differentiation into multipotent germ layers, nascent tissues, and organs. We artificially activated ATF6 in stem cells with a small-molecule ATF6 agonist and, conversely, inhibited ATF6 using induced pluripotent stem cells from patients with ATF6 mutations. We found that ATF6 suppressed pluripotency, enhanced differentiation, and unexpectedly directed mesodermal cell fate. Our findings reveal a role for ATF6 during differentiation and identify a new strategy to generate mesodermal tissues through the modulation of the ATF6 arm of the UPR.
机译:ATF6编码在内质网(ER)中锚定的转录因子,并在展开的蛋白质反应(UPR)期间激活以保护细胞免受ER应激。缺失同种型活化转录因子6α(ATF6α)及其副病剂ATF6β导致胚胎杀伤症和脊髓缺陷的脊髓瘤中的脊髓丧失紊乱,ATF6α的功能突变与人类的畸形神经内膜和先天性视力丧失相关。这些表型对脊椎动物发育期间的ATF6致力于临时作用。我们使用经历分化为多能细菌,新生组织和器官的人干细胞来研究该假设。我们用小分子ATF6激动剂在干细胞中人工活化ATF6,并相反地抑制ATF6突变患者的诱导多能干细胞抑制ATF6。我们发现ATF6抑制了多能性,增强的分化,和意外地指向的中胚层的细胞命运。我们的研究结果揭示了ATF6在分化期间的作用,并确定通过调制UPR的ATF6臂产生中阳离子组织的新策略。

著录项

  • 来源
    《Science Signaling》 |2018年第517期|共13页
  • 作者单位

    Univ Calif San Diego Dept Pathol La Jolla CA 92093 USA;

    Univ Calif San Diego Dept Pharmacol La Jolla CA 92093 USA;

    Scripps Res Inst Dept Mol Med La Jolla CA 92037 USA;

    Univ Calif San Diego Dept Pathol La Jolla CA 92093 USA;

    Scripps Res Inst Dept Mol Med La Jolla CA 92037 USA;

    Univ Calif San Diego Dept Cellular &

    Mol Med La Jolla CA 92093 USA;

    Univ Calif San Diego Dept Ophthalmol La Jolla CA 92093 USA;

    Univ Calif San Diego Dept Pharmacol La Jolla CA 92093 USA;

    Columbia Univ New York Presbyterian Hosp Jonas Childrens Vis Care &

    Bernard &

    Shirlee Brow Dept Ophthalmol Edward S Harkness Eye Inst New York NY 10032 USA;

    Scripps Res Inst Dept Mol Med La Jolla CA 92037 USA;

    Scripps Res Inst Dept Mol Med La Jolla CA 92037 USA;

    Scripps Res Inst Dept Mol Med La Jolla CA 92037 USA;

    Univ Calif San Diego Dept Pathol La Jolla CA 92093 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 细胞生物学;
  • 关键词

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