六环素通过影响氨酸分和线粒体功能,损害人类精子的运动性
Liu Yang1, Guangquan Mei2, Yebin Yang3
1Key Laboratory of Jiangxi University for Applied Chemistry and Chemical Biology, Yichun University, Yichun, China.
概括
六环 (HCH) 通过降低氨酸质化 (Kglu) 和破坏线粒体功能,损害人类精子的运动性. 酸 (Na-glu) 部分扭转了这些影响,这表明男性不孕症的新疗法目标.
科学领域:
- 生殖生物学 生殖生物学
- 环境毒理学环境毒理学
- 生物化学 生物化学
背景情况:
- 精子运动率下降是男性不孕症的主要原因之一.
- 持久性有机污染物,如六环 (HCH),与男性生殖功能障碍有关.
- 人类精子对HCH影响精子的确切机制尚不完全理解.
研究的目的:
- 在实验室中研究HCH对人类精子运动的抑制作用.
- 阐明潜在的分子机制,重点关注氨酸糖和线粒体功能.
- 探索使用前体或清除剂的潜在干预措施.
主要方法:
- 人类精子在体外暴露于不同度和持续时间的HCH.
- 评估精子运动性,氨酸质化 (Kglu) 水平和葡萄糖-6-酸盐脱酶活性.
- 测量活性氧物种 (ROS),线粒体膜潜力和腺三酸盐 (ATP) 水平.
- 对谷氨酸 (Na-glu) 和N-乙-L-氨酸 (NAC) 对HCH诱导的变化的影响的评估.
主要成果:
- HCH 证明了人类精子运动的度和时间依赖的抑制.
- 暴露于HCH减少了精子Kglu水平和葡萄糖-6-酸盐脱酶活性.
- HCH增加了ROS的产生,导致线粒体脱极化和ATP水平降低.
- 氨酸盐部分减轻了HCH对Kglu水平的影响,而NAC对Kglu没有影响.
- 无论是Na-glu还是NAC都部分缓解了HCH诱导的ROS增加和运动能力受损.
结论:
- HCH 抑制人类精子的运动,主要是通过减少氨酸质化 (Kglu) 来抑制.
- 这种Kglu的减少破坏了线粒体的能量代谢,导致精子功能受损.
- 准Kglu代谢,可能使用诸如酸等前体,可能是抵消HCH诱导的男性不孕症的策略.
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