类固醇受体协活性剂-2驱动上皮细胞重编程,使得小鼠胚胎植入成为可能
Vineet K Maurya1, Maria M Szwarc1, David M Lonard1
1Department of Molecular and Cellular Biology, Center for Coregulator Research, Baylor College of Medicine, Houston, Texas, USA.
概括
类固醇受体联合激活剂-2 (SRC-2) 通过使子宫受体成为可能,对胚胎植入至关重要. 丢失SRC-2阻止了胚胎的附着,突出了其在早期怀孕建立中的作用.
科学领域:
- 生殖生物学 生殖生物学
- 分子内分泌学分子内分泌学
- 细胞生物学 细胞生物学
背景情况:
- 已知类固醇受体协活性剂-2 (SRC-2) 对于子宫内膜层细胞中脱细胞化至关重要.
- 在胚胎植入早期阶段,特别是子宫光上皮质中SRC-2的作用仍未得到充分解决.
- 子宫受容性是成功植入胚胎和早期怀孕的关键先决条件.
研究的目的:
- 研究子宫内膜SRC-2在胚胎植入的关键早期阶段的作用.
- 要确定SRC-2是否需要用于用于子宫受体性所必需的等离子体膜转化 (PMT) 状态.
- 阐明SRC-2影响子宫受体和植入的分子机制.
主要方法:
- 在定时自然怀孕研究中使用条件SRC-2淘汰赛小鼠模型 (SRC-2d/d).
- 在SRC-2d/d和对照小鼠中检查了胚胎附着和粘附于子宫光上皮.
- 评估了Mucin 1和E-cadherin在光上皮的表达.
- 进行了转录基因分析,以确定SRC-2子宫内膜的基因表达变化.
主要成果:
- 子宫内膜SRC-2对于胚胎附着和粘附于子宫光上皮是必不可少的.
- SRC-2d/d小鼠表现出植入失败,与持续的顶端Mucin 1和底侧E-cadherin表达相关.
- SRC-2光上皮未能经历用于子宫受体性所需的等离子体膜转化 (PMT).
- 转录学揭示了在SRC-2d/d子宫内膜中涉及类固醇激素控制,上皮紧结和上皮-介质细胞过渡 (EMT) 的基因表达中断.
结论:
- 子宫内膜SRC-2在诱导光上皮质PMT状态方面发挥着新而至关重要的作用.
- 这种SRC-2-依赖的PMT是建立子宫受体性和成功早期怀孕的先决条件.
- SRC-2 调节关键的分子通路,包括控制上皮质完整性和可塑性,这对于植入至关重要.
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