下垂体激素FSH在精子生成过程中指导CREM功能开关
N S Foulkes1, F Schlotter, P Pévet
1Laboratoire de Génétique Moléculaire des Eucaryotes du CNRS, U184 de l'INSERM, Faculté de Médecine, Strasbourg, France.
Nature
|March 18, 1993
概括
卵泡刺激激素 (FSH) 控制精子发育过程中循环AMP响应元素调节器 (CREM) 基因表达的关键发育开关. 这种荷尔蒙调节增强了CREM转录的稳定性,影响了男性的生育能力.
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
- 精子生成规则 精子生成规则
背景情况:
- 克雷姆基因通过替代拼接调节cAMP介导的转录.
- 在精子生成过程中,CREM表达的关键发育开关发生,将其功能从对抗剂转换为激活剂 (CREM tau).
- 从精子前胚胎细胞阶段开始,CREM tau会积累到很高的水平.
研究的目的:
- 阐明在精子生成过程中控制CREM发育开关的生理机制.
- 为了确定在男性生殖细胞发育过程中控制CREM表达的特定激素信号.
主要方法:
- 在老鼠体内进行体切除术,以评估垂体-海波质轴的作用.
- 利用仓鼠的季节性精子生成调节来剖析荷尔蒙控制.
- pituitary激素的直接注射和CREM表达和转录稳定性的分析.
主要成果:
- 低瘤切除术导致大鼠丸中CREM tau表达的灭绝,证实了垂体-海马体轴的参与.
- 卵泡刺激激素 (FSH) 被确定为负责CREM开关的关键激素.
- 通过替代多基解法,FSH调节CREM表达,显著提高了转录稳定性.
结论:
- pituitary-hypothalamic轴,特别是FSH,在调节精子发生过程中CREM发育开关方面发挥着中心作用.
- 通过FSH介导的替代多基解是一种稳定CREM转录的关键机制.
- 了解这种荷尔蒙调节对于理解男性生殖生理学和潜在的生育障碍至关重要.
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