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Cell Rep:命运特化的角膜细胞在损伤后可以去分化补充干细胞库!

2018-01-15 cuiguizhong MedSci原创

以色列哈德拉以色列技术研究院拉帕波特医学研究所的Nasser W近日在Cell Rep发表了一项重要的文章,他们通过转基因小鼠发现,已经特化的角膜细胞具有可塑性,可以去分化重新产生干细胞群,并且可以在基质完好的存在的情况下,重新形成组织边界。

以色列哈德拉以色列技术研究院拉帕波特医学研究所的Nasser W近日在Cell Rep发表了一项重要的文章,他们通过转基因小鼠发现,已经特化的角膜细胞具有可塑性,可以去分化重新产生干细胞群,并且可以在基质完好的存在的情况下,重新形成组织边界。

在形态发生过程中,保留组织边缘部分对于细胞命运的调节是必不可少的。虽然胚胎组织具有较高的可塑性和修复能力,但在成年组织中如何应对剧烈的干细胞(SC)丢失以及组织边缘被破坏的问题尚未得到解决。

在这篇文章中,他们报告说,利用K15-GFP转基因标记的小鼠,发现被称为角膜缘的位置是角膜上皮边缘和干细胞微环境的位置。谱系示踪发现,K 15-GFP阳性的基底细胞表达干细胞的标记物,位于可以进行角膜再生的部位。另外,值得注意的是,利用手术操作,去除干细胞微环境后,已经命运特化到角膜类型的细胞可以去分化为角膜边缘的干细胞,并保留正常的组织形态,表达相应的标记物。然而有趣的是,对角膜边缘基质微环境损害后,K15-GFP细胞不能恢复组织损伤,并导致病理性伤口愈合。

总之,这项研究表明,已经特化的角膜细胞具有可塑性,可以去分化重新产生干细胞群,并且可以在基质完好的存在的情况下,重新形成组织边界。

原文出处:

Nasser, W., et al., Corneal-Committed Cells Restore the Stem Cell Pool and Tissue Boundary following Injury. Cell Rep, 2018. 22(2): p. 323-331.

本文系梅斯医学(MedSci)原创编译整理,转载需授权!

 

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    2018-09-10 维他命
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    2018-01-17 snowpeakxu
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    2018-01-15 有备才能无患

    以色列哈德拉以色列技术研究院拉帕波特医学研究所的NasserW近日在CellRep发表了一项重要的文章.他们通过转基因小鼠发现.已经特化的角膜细胞具有可塑性.可以去分化重新产生干细胞群.并且可以在基质完好的存在的情况下.重新形成组织边界.

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