哺乳动物生殖道的两形性发育需要Wnt-7a
1Department of Molecular and Cellular Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|October 28, 1998
概括
Wnt-7a信号传递对男性生殖道发育至关重要,因为它使米勒里亚管回归成为可能. 在男性中缺少它会导致女性通道的发育,导致不孕.
科学领域:
- 发育生物学是发展生物学.
- 生殖生物学 生殖生物学
- 遗传学 是一个遗传学.
背景情况:
- 哺乳动物生殖道的发育涉及Müllerian和Wolffian管道的性二态分化.
- 在男性中,穆勒里亚管回归是由穆勒里亚抑制物质 (MIS) 和其受体介导的.
- 在MIS或其受体中发生的突变会破坏性差异化,导致伪性恋和不育.
研究的目的:
- 研究Wnt-7a信号分子在哺乳动物性发育中的作用.
- 确定Wnt-7a影响Müllerian通道回归的机制.
- 了解Wnt-7a缺乏对生殖道形成和生育能力的影响.
主要方法:
- 产生和分析Wnt-7a缺乏的小鼠.
- 在Wnt-7a突变和野生型小鼠的生殖道组织学检查.
- 在Wnt-7a缺陷胚胎中评估Müllerian抑制物质受体表达.
主要成果:
- 缺乏Wnt-7a信号的雄性小鼠表现出Müllerian管道回归的失败.
- 由于Wnt-7a缺乏,因此没有抑制Müllerian的物质受体.
- 缺少Wnt-7a的雌性小鼠表现出Müllerian导管衍生物 (卵管,子宫) 的异常发育,导致不孕.
结论:
- 在男性中,Wnt-7a信号传递对于Müllerian导管的正常回归至关重要.
- Wnt-7a调节了抑制穆勒的物质受体的表达.
- 在哺乳动物中,Wnt-7a在建立性二态生殖通道方面发挥着关键作用.
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