Nat Genet:干细胞构建的马凡综合征血管模型可鉴定出平滑肌细胞死亡的关键调控因子

2017-03-08 MedSci MedSci原创

我们构建了源自人诱导多能干细胞(MFS-hiPSC)的血管模型,新模型使我们能够更进一步分析马凡综合征的分子机制,并确定新的治疗靶标(比如p38和KLF4),为新药测试提供一个创新性的人体平台。

马凡综合征(MFS)是由FBN1突变引起的可遗传结缔组织病,FBN1即编码细胞外基质蛋白原纤蛋白-1。

近来来自剑桥大学的学者发表研究型文章于Nature Genetics,该杂志目前影响因子为31.616。 研究结果为马凡综合征的进一步探索提供了新思路。

为了研究马凡综合征中主动脉瘤的发病机制,我们构建了源自人诱导多能干细胞(MFS-hiPSC)的血管模型。我们的MFS-hiPSC来源的平滑肌细胞体现出马凡主动脉的病理特征,包括原纤蛋白-1聚集、细胞外基质降解、转化生长因子-β(TGF-β)信号、收缩和凋亡等多种缺陷。这些异常可被基于CRISPR技术编辑的FBN1突变而校正。抑制TGF-β信号可逆转异常原纤蛋白-1的积累和基质金属蛋白酶的表达。然而,只有非经典p38信号通路调节血管平滑肌细胞的凋亡,这一病理机制也由Krüppel样因子4(KLF4)调控。这一新模型使我们能够更进一步分析马凡综合征的分子机制,并确定新的治疗靶标(比如p38和KLF4),为新药测试提供一个创新性的人体平台。

原始出处:Granata A, Serrano F,et al.An iPSC-derived vascular model of Marfan syndrome identifies key mediators of smooth muscle cell death.Nat Genet. 2017 Jan;49(1):97-109. doi: 10.1038/ng.3723. Epub 2016 Nov 28.

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    2017-06-03 cy0324
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    2018-02-04 canlab
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    2017-04-14 liye789132251
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