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通过稳定HOIP,GPS2通过增强内皮细胞存活来调节胚胎血管生成

Ying Lu^1,2,3, Huan-Huan Tian², Wen-Bing Ma⁴

¹Faculty of Chemistry and Life Sciences, Beijing University of Technology, Beijing, China.

Cell death and differentiation

|January 8, 2026

概括

G蛋白通路抑制剂2 (GPS2) 通过稳定HOIP,防止细胞死亡和保持血管完整性,对内皮细胞生存和胚胎血管化至关重要.

科学领域:

细胞生物学细胞生物学
发展生物学发展生物学
分子生物学分子生物学

背景情况:

抑制内皮细胞 (EC) 死亡对于血管生成至关重要.
作为LUBAC的关键组成部分,HOIP在胚胎发生过程中对EC生存至关重要,但其稳定性调节尚不清楚.

研究的目的:

研究G蛋白通路抑制剂2 (GPS2) 在调节EC存活率和胚胎血管化的作用.
阐明GPS2控制HOIP稳定的分子机制.

主要方法:

产生了EC特定的GPS2删除小鼠 (Gps2^ECKO).
在Gps2^ECKO小鼠中分析了血管化缺陷和胚胎死亡率.
研究了GPS2和HOIP之间的相互作用,以及对HOIP无处不在和降解的影响.
评估了对TNFR1介导的细胞死亡和NF-κB激活的影响.

主要成果:

由于有缺陷的血管化,EC特定的GPS2删除导致E16.5的胚胎死亡.
在EC中GPS2缺乏导致TNFR1介导的细胞死亡增加.
GPS2与HOIP结合,抑制其与K48结合的多基化,并防止蛋白质体的降解.
缺少GPS2导致HOIP降解,LUBAC不稳定,NF-κB激活减弱,EC死亡率增加.

结论:

在胚胎发生过程中,GPS2对于维持血管完整性至关重要.
GPS2稳定HOIP,从而抑制TNFR1介导的内皮细胞死亡.
GPS2通过HOIP稳定性控制来调节EC生存和胚胎血管化.

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