丁丁甲酸破坏了糖原合成酶激酶3α,这对于精子运动至关重要
Seung Hyun Park1, Myung Chan Gye1
1Department of Life Science and Institute for Natural Sciences, Hanyang University, Seoul 04763, Republic of Korea.
Ecotoxicology and environmental safety
|January 19, 2024
概括
在小鼠中暴露于二甲基甲酸盐 (DBP) 通过降低糖原合成酶激酶3α (GSK3α) 水平并改变其酸化,损害了精子运动性. DBP增加氧化应激并激活蛋白酸酶,导致GSK3α通过ubiquitin-proteasome途径降解.
科学领域:
- 生殖毒理学 生殖毒理学
- 内分泌学 在内分泌学.
- 分子生物学分子生物学
背景情况:
- 甲酸乙是常见的内分泌干扰剂.
- 糖原合成酶激酶3α (GSK3α) 对于精子功能至关重要.
- 甲酸对精子的毒性机制尚未完全理解.
研究的目的:
- 为了研究二甲 (DBP) 对小鼠精子中的GSK3α稳定性和酸化的影响.
- 阐明反应性氧物种 (ROS) 和蛋白酸酶在DBP诱导的精子功能障碍中的作用.
主要方法:
- 计算机辅助的精子分析以评估运动性.
- 西方涂抹和免疫光学分析GSK3α及其酸化.
- 测量活性氧物种 (ROS),脂质过氧化物和酸酶活性.
- 用蛋白酶和酸酶抑制剂进行治疗.
主要成果:
- DBP显著降低了精子运动性,并增加了ROS和脂质过氧化物水平.
- DBP改变了GSK3α的酸化,降低了p-GSK3α (Ser21) 和增加了p-GSK3α (Tyr279).
- DBP增加了酸酶活性和GSK3α泛基化,通过泛基-蛋白酶体通路导致其降解.
结论:
- 通过降低GSK3α水平并改变其酸化,DBP会损害精子的运动性.
- ROS生成和酸酶激活有助于DBP诱导的精子毒性.
- DBP通过氧化应激和GSK3α的蛋白质体降解来破坏精子功能.
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