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人多能干细胞诱导的静脉成血管细胞可发育成功能性肝窦内皮细胞
2020-07-09 10:26

加拿大多伦多市大学健康网络Gordon M. Keller和Blair K. Gage研究团队合作发现,由人多能干细胞(hPSC)诱导的静脉成血管细胞可以发育为功能性肝窦内皮细胞(LSEC)。 相关论文于2020年7月6日在线发表于《细胞—干细胞》。

为了更好地理解肝窦内皮细胞的功能,研究人员制定了一种方案,首先优化动脉和静脉血管母细胞和衍生内皮细胞的规格,从而由人多能干细胞生成LSEC。缺氧、环状AMP(cAMP)激活和转化生长因子β(TGF-β)抑制诱导LSEC样细胞的结果表明,在体外静脉内皮细胞上调LSEC标记和功能比动脉细胞反应更快、更强。

在新生儿进行肝内移植后,静脉成血管细胞移植到肝脏中生成具有清除功能和主要人类LSEC分子特征的成熟、有孔LSEC。当移植到成年小鼠肝脏中时,成血管细胞有效地产生了成熟的LSEC,并产生了强大的VIII因子(FVIII)。利用hPSC衍生的LSEC对鼠肝进行人源化的方法为研究这种关键肝细胞类型的生物学特性提供了一个简易的系统。

研究人员表示,LSEC形成高度特异的微脉管系统,在肝功能和疾病中起关键作用。

附:英文原文

Title: Generation of Functional Liver Sinusoidal Endothelial Cells from Human Pluripotent Stem-Cell-Derived Venous Angioblasts

Author: Blair K. Gage, Jeff C. Liu, Brendan T. Innes, Sonya A. MacParland, Ian D. McGilvray, Gary D. Bader, Gordon M. Keller

Issue&Volume: 2020-07-07

Abstract: Liver sinusoidal endothelial cells (LSECs) form a highly specialized microvasculaturethat plays a critical role in liver function and disease. To better understand thisrole, we developed a strategy to generate LSECs from human pluripotent stem cells(hPSCs) by first optimizing the specification of arterial and venous angioblasts andderivative endothelial populations. Induction of a LSEC-like fate by hypoxia, cyclicAMP (cAMP) agonism, and transforming growth factor β (TGF-β) inhibition revealed thatvenous endothelial cells responded more rapidly and robustly than the arterial cellsto upregulate LSEC markers and functions in vitro. Upon intrahepatic transplantation in neonates, venous angioblasts engrafted theliver and generated mature, fenestrated LSECs with scavenger functions and molecularprofiles of primary human LSECs. When transplanted into the liver of adult mice, angioblastsefficiently gave rise to mature LSECs with robust factor VIII (FVIII) production.Humanization of the murine liver with hPSC-derived LSECs provides a tractable systemfor studying the biology of this key liver cell type.

DOI: 10.1016/j.stem.2020.06.007

Source: https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(20)30274-5

Cell Stem Cell:《细胞—干细胞》,创刊于2007年。隶属于细胞出版社,最新IF:25.269
官方网址:https://www.cell.com/cell-stem-cell/home
投稿链接:https://www.editorialmanager.com/cell-stem-cell/default.aspx


本期文章:《细胞—干细胞》:Online/在线发表

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