仓鼠精子具有功能性Na+/Ca2+-交换器1:它对过度活化的影响
Gen L Takei1, Yuhei Ogura2, Yoshihiro Ujihara2
1Department of Pharmacology and Toxicology, Dokkyo Medical University, 880 Kitakobayashi, Mibu, Tochigi 321-0293, Japan.
International journal of molecular sciences
|May 27, 2023
概括
仓鼠精子过度激活是由-交换器 (NCX1) 调节的. 这种蛋白质的蛋白质.
科学领域:
- 精子学 精子学
- 生殖生物学 生殖生物学
- 交通运输 交通运输 交通运输
背景情况:
- 细胞外Na+通过减少细胞内Ca2+来抑制仓鼠精子过活化.
- -交换器 (NCX) 抑制剂可以逆转这种抑制,表明NCX参与.
- 此前,缺乏关于子精子中NCX存在和功能的直接证据.
研究的目的:
- 为了确认子精子中NCX的存在和功能.
- 研究NCX在调节精子过活化的作用.
主要方法:
- RNA测序 (RNA-seq) 用于检测仓鼠丸中的NCX转录.
- 西方斑点用于检测NCX蛋白表达.
- Fura-2成像测量Na+依赖的Ca2+流入,表明NCX活动.
- 使用特定NCX1抑制剂SEA0400.00的抑制研究.
- 在容量化条件下评估NCX1活动.
主要成果:
- 检测到NCX1和NCX2的转录;只有NCX1蛋白在仓鼠的精子中被确定.
- 显著的Na+依赖的Ca2+流入被观察到在仓鼠精子中,特别是在尾部.
- NCX 抑制剂 SEA0400 阻止了这种流入,证实了 NCX1 的活性.
- 在3小时的电容后,NCX1活动下降.
- 在电容化时NCX1活动的这种下调与触发过度激活有关.
结论:
- 哈姆斯特精子具有功能性的NCX1.1.
- 在电容化过程中,NCX1活动的下调.
- 这种下调是释放精子过度活化的"车"的关键机制.
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