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首页> 外文期刊>Biology Open >Collagen vitrigel promotes hepatocytic differentiation of induced pluripotent stem cells into functional hepatocyte-like cells
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Collagen vitrigel promotes hepatocytic differentiation of induced pluripotent stem cells into functional hepatocyte-like cells

机译:胶原玻璃质凝胶促进诱导的多能干细胞向功能性肝细胞样细胞的肝细胞分化

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Differentiation of stem cells to hepatocytes provides an unlimited supply of human hepatocytes and therefore has been vigorously studied. However, to date, the stem cell-derived hepatocytes were suggested to be of immature features. To obtain matured hepatocytes from stem cells, we tested the effect of culturing human-induced pluripotent stem (hiPS) cell-derived endoderm cells on collagen vitrigel membrane and compared with our previous reported nanofiber matrix. We cultured hiPS cell-derived endoderm cells on a collagen vitrigel membrane and examined the expression profiles, and tested the activity of metabolic enzymes. Gene expression profile analysis of hepatocytic differentiation markers revealed that upon culture on collagen vitrigel membrane, immature markers ofAFPdecreased, with a concomitant increase in the expression of mature hepatocyte transcription factors and mature hepatocyte markers such asALB,ASGR1. Mature markers involved in liver functions, such as transporters, cytochrome P450 enzymes and phase II metabolic enzymes were also upregulated. We observed the upregulation of the liver markers for at least 2?weeks. Gene array profiling analysis revealed that hiPS cell-derived hepatocyte-like cells (hiPS-hep) resemble those of the primary hepatocytes. Functions of the CYP enzyme activities were tested in multi-institution and all revealed high CYP1A, CYP2C19, CYP2D6, CYP3A activity, which could be maintained for at least 2?weeks in culture. Taken together, the present approach identified that collagen vitrigel membrane provides a suitable environment for the generation of hepatocytes from hiPS cells that resemble many characteristics of primary human hepatocytes.
机译:干细胞向肝细胞的分化提供了无限量的人类肝细胞,因此已经进行了深入研究。但是,迄今为止,干细胞来源的肝细胞被认为具有不成熟的特征。为了从干细胞获得成熟的肝细胞,我们测试了在胶原玻璃质凝胶膜上培养人类诱导的多能干(hiPS)细胞衍生的内胚层细胞的效果,并与我们先前报道的纳米纤维基质进行了比较。我们在胶原玻璃质凝胶膜上培养了来自hiPS细胞的内胚层细胞,并检查了表达谱,并测试了代谢酶的活性。肝细胞分化标志物的基因表达谱分析表明,在胶原玻璃体凝胶膜上培养后,AFP的未成熟标志物减少,同时成熟肝细胞转录因子和成熟肝细胞标志物如ALB,ASGR1的表达也随之增加。参与肝功能的成熟标志物,例如转运蛋白,细胞色素P450酶和II期代谢酶也被上调。我们观察了至少2周的肝标志物上调。基因阵列分析表明,hiPS细胞来源的肝细胞样细胞(hiPS-hep)与原代肝细胞相似。在多机构中测试了CYP酶活性的功能,并且均显示出较高的CYP1A,CYP2C19,CYP2D6,CYP3A活性,可以在培养中维持至少2周。综上所述,本方法鉴定出胶原玻璃质凝胶膜为从类似于人类原代肝细胞许多特征的hiPS细胞产生肝细胞提供了合适的环境。

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