MAP4K4调节整合素-FERM结合,以控制内皮细胞的运动性.
Philip Vitorino1, Stacey Yeung1, Ailey Crow1
1Molecular Biology Department, Genentech, Inc., South San Francisco, California 94080, USA.
Nature
|March 25, 2015
概括
涉及MAP4K4的新型分子通路,莫因,塔林和β1-整合素对于内皮细胞迁移和膜收缩至关重要. 这条通路调节细胞运动和血管形成,提供了潜在的治疗点.
科学领域:
- 细胞生物学 细胞生物学
- 分子生物学分子生物学
- 血管新生研究研究
背景情况:
- 细胞迁移是一个复杂的过程,对发育和疾病至关重要.
- 了解内皮细胞迁移的分子机制对于控制血管生成至关重要.
研究的目的:
- 为了确定关键的分子参与者调节在内皮细胞迁移过程中血膜收缩.
- 阐明MAP4K4-moesin-talin-β1-integrin通路在细胞迁移和血管生成中的功能作用.
主要方法:
- 在体外血管生成屏幕使用短干扰RNA (siRNA) 和化学抑制剂.
- 蛋白质酸化和蛋白质与蛋白质相互作用的分析.
- 在体外和体内测试以评估细胞迁移,膜动力学和血管生成.
- 经验分析分析以确定分子事件的顺序.
主要成果:
- 确定了一条MAP4K4-moesin-talin-β1-integrin通路,促进移徙内皮细胞中的血膜收缩.
- 失去MAP4K4会损害内皮细胞迁移,减少膜动力学,并在体外和体内抑制血管生成.
- MAP4K4可酸化莫因,然后与塔林竞争 β1-整合素结合,促进焦点粘附分解.
- 阻断α5β1-整合素逆转了由MAP4K4损失引起的迁移缺陷.
- 在疾病模型中,MAP4K4抑制抑制了病态血管生成.
结论:
- MAP4K4是通过moesin-talin-β1-integrin通路进行内皮细胞迁移的关键调节者.
- 这一途径对于有效的膜收缩和焦点粘附分解至关重要.
- MAP4K4代表了涉及病理血管生成的疾病的有前途的治疗标.
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