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囊胞扩张和AMOT降解合作促进YAP核定位在表皮质形成期间
Hinako Maeda1, Hiroshi Sasaki1
1Laboratory for Embryogenesis, Graduate School of Frontier Biosciences, Osaka University, 1-3 Yamadaoka, Suita, Osaka, 565-0871, Japan.
Developmental biology
|November 1, 2024
概括
在胚胎早期发育过程中,有两种机制控制YAP的核定位. 囊胞扩张和SOX2-AMOT信号通过抑制YAP酸化,确保强大的表皮质形成.
科学领域:
- 发展生物学 发展生物学
- 细胞生物学 细胞生物学
- 遗传学 遗传学 是一个
背景情况:
- 从内部细胞质 (ICM) 形成表皮质对于早期胚胎发育至关重要.
- YAP (Yes相关蛋白) 的核转位和随后的TEAD (TEA域) 转录因子激活对于多能性基因表达至关重要.
- 在表皮质特异化过程中调节YAP局部化的机制在很大程度上是未知的.
研究的目的:
- 阐明在表皮质形成期间控制YAP局部化的机制.
- 了解YAP核转移在早期胚胎发育的背景下是如何调节的.
主要方法:
- 研究了Blastocoel扩张和F-actin动态在YAP局部化中的作用.
- 检查了AMOT (成人基本素拉链和RING指域1) 表达和降解的调节.
- 评估了SOX2表达对于AMOT减少和YAP酸化变化的必要性.
主要成果:
- 布拉斯托科尔扩张通过增加细胞质F-actin和减少YAP酸化,促进核YAP局部化.
- 细胞分化通过AMOT调节YAP,这是Hippo途径的组成部分,它以坦基拉酶依赖的方式降解.
- 在ICM中需要SOX2表达来减少AMOT和减少YAP酸化,这表明平行调节途径.
结论:
- 两个并行机制,即Blastocoel-F-actin轴和SOX2-AMOT轴,共同抑制YAP酸化并促进其核定位.
- 这些协调的机制确保了强大的YAP活动,有助于在早期胚胎发生过程中可靠地分化表皮质细胞.
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