在小鼠,子和人类的卵巢卵泡发育中,有着进化上不同的转录组程序
Baku Nakakita1,2,3, Ken Mizuta1,2, Yoshitaka Katou1,2
1Institute for the Advanced Study of Human Biology (ASHBi), Kyoto University, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan.
概括
人类和子卵细胞的成熟与小鼠不同,直到后期阶段才出现最小的变化. 这项研究揭示了卵巢卵泡发育中的特定物种基因表达和通信,这对生殖医学至关重要.
科学领域:
- 生殖生物学 生殖生物学
- 发展生物学 发展生物学
- 基因组学就是基因组学.
背景情况:
- 了解人类卵巢卵泡发育对于生殖医学至关重要.
- 卵细胞和颗粒细胞 (GC) 的相互作用是毛囊发育的关键.
- 跨物种的比较转录基因分析可以揭示保存和分歧的机制.
研究的目的:
- 为了研究和比较卵细胞和GCs在小鼠,子和人类的卵泡发育过程中的转录组学动态.
- 为了确定卵巢毛囊发育中的特定物种差异和保存途径.
- 建立和评估用于人类和子前腔毛囊发育的体外培养系统.
主要方法:
- 卵细胞和GC的单细胞RNA测序在不同卵泡发育阶段.
- 进行比较转录基因分析以识别高度可变的基因 (HVGs) 和保存/分离的途径.
- 开发和评估用于灵长类毛囊发育的体外培养系统.
主要成果:
- 与小鼠不同的是,和人类卵细胞在转录基因变化最小,直到二次卵泡阶段.
- 大多数卵细胞中的HVG都表现出单调调节,具有有限的跨物种重叠.
- GC的转录基因轨迹和细胞间通信途径 (例如,信号传输,间隙结) 是特定于物种的.
- 保存的机制包括X染色体剂量补偿和转子子抑制.
- 试管培养支持卵泡发育,但尽管卵细胞成熟正常,但显示出异常的GC配置文件.
结论:
- 卵巢卵泡发育涉及显著的特定物种的转录和细胞间通信差异.
- 这种比较框架有助于理解人类卵巢发育和体外重建.
- 在实验室中异常的GC档案突出显示了重复原生卵巢微环境的挑战.
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