Metalloproteinase regulation improves in vitro generation of efficacious platelets from mouse embryonic stem cells.

Metalloproteinase regulation improves in vitro generation of efficacious platelets from mouse embryonic stem cells.
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金属蛋白酶调节可改善小鼠胚胎干细胞的体外产生有效的血小板。

DOI:
10.1084/jem.20071482
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发表时间:
2008-08-04
影响因子:
15.3
通讯作者:
Nakauchi, Hiromitsu
Nakauchi, Hiromitsu
中科院分区:
医学1区
文献类型:
--
作者:
Nishikii, Hidekazu;Eto, Koji;Tamura, Noriko;Hattori, Koichi;Heissig, Beate;Kanaji, Taisuke;Sawaguchi, Akira;Goto, Shinya;Ware, Jerry;Nakauchi, Hiromitsu

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胚胎干细胞(ESCs)可以潜在地弥补输血中血小板的缺乏。在这里,我们描述了一种新的方法,用于产生小鼠胚胎干细胞衍生的血小板(ESP),可以在体内止血。在第6天对来自胚状体的细胞进行流式细胞术分选,证明c-Kit+整合素αIIb(αIIb)+细胞,而不是CD 31+细胞或血管内皮钙粘蛋白+细胞,能够在第12天进行巨核细胞生成和释放血小板样结构。表达αIIbβ3的ESP表现出糖蛋白(GP)Ibα、GPV和GPVI的胞外域脱落,但不表现出αIIbβ3或GPIbβ。ESP显示受损的αIIbβ3活化和整合素介导的肌动蛋白重组,这是正常血小板功能的关键事件。然而,在分化过程中给予金属蛋白酶抑制剂GM 6001或TAPI-1增加了GPIbα的表达,改善了体外血栓形成和体内输血后恢复。因此,培养中金属蛋白酶的调节可能有助于获得高质量,有效的ESP作为输血的替代血小板来源。
Embryonic stem cells (ESCs) could potentially compensate for the lack of blood platelets available for use in transfusions. Here, we describe a new method for generating mouse ESC-derived platelets (ESPs) that can contribute to hemostasis in vivo. Flow cytometric sorting of cells from embryoid bodies on day 6 demonstrated that c-Kit+ integrin αIIb (αIIb)+ cells, but not CD31+ cells or vascular endothelial cadherin+ cells, are capable of megakaryopoiesis and the release of platelet-like structures by day 12. αIIbβ3-expressing ESPs exhibited ectodomain shedding of glycoprotein (GP)Ibα, GPV, and GPVI, but not αIIbβ3 or GPIbβ. ESPs showed impaired αIIbβ3 activation and integrin-mediated actin reorganization, critical events for normal platelet function. However, the administration of metalloproteinase inhibitors GM6001 or TAPI-1 during differentiation increased the expression of GPIbα, improving both thrombogenesis in vitro and posttransfusion recovery in vivo. Thus, the regulation of metalloproteinases in culture could be useful for obtaining high-quality, efficacious ESPs as an alternative platelet source for transfusions.
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发表时间: 2004-10-01
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