解读光周期线索在转导基斯平素-黑激素电路中的作用,在普通鱼的青春期开始期间
Nehareeka Dan1, Harsh Shah1, Himadri Bhatt1
1TREE Lab, Department of Biomedical and Life Sciences, School of Science, Navrachana University, Vadodara, India.
Molecular reproduction and development
|May 27, 2024
概括
长日通过抑制黑素来加速普通鱼的青春期,从而允许kisspeptin信号激活生殖轴. 短日延迟青春期通过黑激素通过黑激素.
科学领域:
- 生殖内分泌学 生殖内分泌学
- 鱼类生物学 鱼类生物学
- 时间生物学 时间生物学
背景情况:
- 鱼类的青春期开始受到环境因素的影响.
- 光周期是调节鱼类繁殖的关键环境因素.
- 黑色素和kisspeptin系统与生殖时间有关.
研究的目的:
- 为了研究光周期,黑激素和kisspeptin在普通鱼青春期发作的作用.
- 阐明了光周期性生殖调节的基础分子机制.
主要方法:
- 雌性常见鱼指纹暴露于长日 (LD) 和短日 (SD).
- 基因表达分析下丘脑-垂体-卵巢 (HPO) 轴组件,黑激素受体和转录调节器.
- 在体外实验中使用雌醇和黑激素治疗.
主要成果:
- 长时间上调HPO轴基因和生殖调节器,同时降低黑激素受体表达.
- 短日抑制了生殖基因表达,增加了黑激素受体表达.
- 在体外,雌激醇模仿了LD效应,而黑色素抑制了生殖基因表达和增加了黑色素受体表达.
结论:
- 黑色素和kisspeptin作为对立的调节器的青春期时间在普通鱼.
- 长时间诱导的黑激素抑制促进了kisspeptin的信号传递,促进了GnRH的释放和性腺成熟.
- 摄影周期控制黑激素是指导鱼类生殖发育的关键机制.
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