CASZ1 promotes vascular assembly and morphogenesis through the direct regulation of an EGFL7/RhoA-mediated pathway.

CASZ1 promotes vascular assembly and morphogenesis through the direct regulation of an EGFL7/RhoA-mediated pathway.
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DOI:
10.1016/j.devcel.2013.03.003
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发表时间:
2013-04-29
期刊:
影响因子:
11.8
通讯作者:
Conlon, Frank L.
Conlon, Frank L.
中科院分区:
生物学1区
文献类型:
--
作者:
Charpentier, Marta S.;Christine, Kathleen S.;Amin, Nirav M.;Dorr, Kerry M.;Kushner, Erich J.;Bautch, Victoria L.;Taylor, Joan M.;Conlon, Frank L.

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血管系统的形成对胚胎发育和体内平衡至关重要。然而,这一过程的转录控制尚未完全了解。在这里,我们报告了一个进化保守的作用,转录因子CASZ 1在血管组装和形态发生。在没有CASZ 1的情况下,非洲爪蟾胚胎不能发育出分支和管腔化的血管系统,CASZ 1耗尽的人内皮细胞在粘附、形态和发芽方面显示出显著的改变。从机制上讲,我们表明CASZ 1直接调节表皮生长因子样结构域7(Egfl 7)。我们进一步证明,CASZ 1或EGFL 7缺失细胞的缺陷部分是由于RhoA表达减少和粘着斑定位受损。此外,CASZ 1耗尽细胞中的这些异常内皮细胞行为可以通过Egfl 7的恢复来挽救。总的来说,这些研究表明CASZ 1需要直接调节独特的EGFL 7/RhoA介导的途径,以促进脊椎动物血管发育。
The formation of the vascular system is essential for embryonic development and homeostasis. However, transcriptional control of this process is not fully understood. Here we report an evolutionarily conserved role for the transcription factor CASZ1 in blood vessel assembly and morphogenesis. In the absence of CASZ1, Xenopus embryos fail to develop a branched and lumenized vascular system, and CASZ1-depleted human endothelial cells display dramatic alterations in adhesion, morphology, and sprouting. Mechanistically, we show CASZ1 directly regulates Epidermal Growth Factor-Like Domain 7 (Egfl7). We further demonstrate that defects of CASZ1 or EGFL7-depleted cells are in part due to diminished RhoA expression and impaired focal adhesion localization. Moreover, these abnormal endothelial cell behaviors in CASZ1-depleted cells can be rescued by restoration of Egfl7. Collectively, these studies show CASZ1 is required to directly regulate a unique EGFL7/RhoA-mediated pathway to promote vertebrate vascular development.
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