在精子生成过程中通过对抗性转录因子控制状转录程序
Weihua Wang1,2, Junqiao Xing1,2, Xiqi Zhang1
1Institute of Microalgae Synthetic Biology and Green Manufacturing, School of Life Sciences, Jianghan University, Wuhan, China.
eLife
|February 26, 2025
概括
两个古老的转录因子,Xap5和Xap5-like (Xap5l),在精子发育过程中调节状基因表达. 它们的对抗作用对男性生育能力和适当的精子鞭毛形成至关重要.
科学领域:
- 进化生物学是进化的生物学.
- 分子生物学分子生物学
- 生殖生物学 生殖生物学
背景情况:
- 毛是最后一个真核生物共同祖先中存在的古老结构.
- 细胞生成的转录调节的演变仍然不太了解.
- 控制真核生物间状基因表达的古代转录因子在很大程度上未被识别.
研究的目的:
- 研究X染色体关联蛋白5 (Xap5) 和其对应物Xap5-like (Xap5l) 在细胞生成的转录调节中的作用.
- 阐明精子发生过程中纤毛基因调节背后的进化机制.
主要方法:
- 在小鼠 (Xap5和Xap5l缺陷) 中进行基因淘汰研究.
- 介质性进展和精子形态学的分析.
- 研究关键状基因 (例如,Foxj1,Rfx) 的转录调节.
主要成果:
- 缺少Xap5或Xap5l的雄性小鼠表现为不孕.
- 缺少Xap5会导致中介性预相停止.
- 缺少Xap5l会导致精子鞭毛形.
- 在早期的精子生成过程中,Xap5通过激活Foxj1和Rfx家族来积极调节状基因表达.
- Xap5l通过抑制精子发生过程中的这些因素来负面调节状基因表达.
结论:
- Xap5和Xap5l作为一种保留对的对抗性转录调节器,控制着状转录程序.
- 这些因素对于精子发生过程中状基因表达的时间和空间协调至关重要.
- 这些发现提供了关于纤毛细胞基因调节的演变的见解.
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