未来胎儿组织谱系的分子干扰与延迟的欧普洛伊德爆发相关
Blair R McCallie1, Michelle M Denomme1, Mary E Haywood1
1CCRM Genetics, 10290 Ridgegate Circle, Lone Tree, CO 80124, USA.
Fertility and sterility
|June 11, 2025
概括
延迟的胚胎细胞发育 (第7天) 显著改变了细胞内基因表达,影响了胚胎发生和降低了生殖潜力. trofektoderm 基因表达在很大程度上不受影响,这表明细胞内部质量分子活动是发展能力的关键.
科学领域:
- 生殖生物学和发育科学.
- 基因组学和转录组学.
- 辅助生殖技术 辅助生殖技术.
背景情况:
- 与第5天的对应物相比,第7天的euploid芽细胞体表现出降低的生殖潜力.
- 了解这种降低潜力的分子驱动因素对于改善试管婴儿结果至关重要.
- 胚胎细胞的发育时间影响了胚胎基因表达特征.
研究的目的:
- 为了研究第7天欧类胚胎囊生殖能力下降的基础分子活动.
- 为了比较第5天和第7天欧子胚胎细胞的转录组.
- 为了确定与延迟胚胎细胞发育相关的特定基因表达模式和途径.
主要方法:
- 从年龄相匹配的第5天和第7天欧卵性母细胞体内细胞质和肌体的转录组分析 (RNA测序).
- 路径丰富和基因本体学分析以确定功能相关性.
- 定量实时PCR用于验证差异表达基因.
主要成果:
- 在第5天和第7天之间观察到基因转录的显著差异.
- 第7天内细胞质量显示2880个差异表达的基因,主要是下调,影响信号转导和原始内皮发育.
- 第7天的肌体表现出2057个差异表达的基因,观察到代谢和内分泌网膜压力,蛋白质降解的增加,以及第7天胚胎囊中的表观遗传调节受损.
结论:
- 第7天内细胞质量转录组揭示了关键胚胎发生基因的显著扰乱和下调,解释了发育延迟.
- 没有受到影响的第7天的肌体通路表明,细胞内部质量 (未来的胎儿) 驱动了胚胎细胞的生殖潜力.
- 确定重要的胚胎途径可以为预后不佳的患者提供改进的扩展培养系统的开发信息.
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