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在小鼠中,子宫WNTS调节了通过WNT/CA2+信号通路通过胚胎细胞附着所需的纤维素结合活性
Yuefei Lou1,2, Laurie Pinel1,3,4, Daniel Dufort5,6,7
1Department of Obstetrics and Gynecology, McGill University, Montreal, QC, H4A 3J1, Canada.
Reproductive biology and endocrinology : RB&E
|September 15, 2023
概括
Wnt信号通过控制整合素 (细胞粘附分子) 贩运来调节胚胎细胞植入. 这个过程增强了胚胎囊与子宫内膜的附着,这对于成功怀孕至关重要.
科学领域:
- 生殖生物学 生殖生物学
- 细胞信号传递 细胞信号传递
- 发展生物学 发展生物学
背景情况:
- 胚胎囊对子宫表皮的粘附对于植入至关重要.
- 在这个过程中,因特林介导的对纤维蛋白的粘附是关键组成部分.
- 在植入过程中,Wnt信号在调节整合素贩运中的作用以前是未知的.
研究的目的:
- 研究Wnt信号在调节胚胎囊粘附中的作用.
- 为了确定Wnt蛋白质如何影响整合素定位和功能.
- 为了确定特定的Wnt信号通路,涉及到胚胎细胞的附着.
主要方法:
- 在用Wnt5a或Wnt7a治疗的芽细胞中,Itgα5β1的免疫光局部化.
- 纤维菌素 (FN) 结合测试以评估整体蛋白活性.
- 使用Wnt抑制剂sFRP2和途径抑制剂 (p38MAPK,PI3K,CamKII) 的抑制研究.
- 评估胚芽细胞与子宫上皮细胞的结合.
主要成果:
- Wnt5a和Wnt7a诱导了Itgα5β1转移到胚囊表面,并增加了FN结合.
- 子宫液促进整体蛋白转位,由sFRP2.2抑制.
- 抑制CamKII通路,但没有p38MAPK或PI3K,减少了Wnt诱导的FN结合.
- 通过sFRP2抑制Wnt降低了胚胎细胞与子宫细胞的结合.
结论:
- Wnt信号通过整合素贩运来调节胚胎细胞粘附.
- 坎基II参与了Wnt介导的整合素活性调节.
- Wnt信号传递是 бластоциста成功附着于子宫表皮的关键因素.
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