在小鼠卵细胞成熟过程中,PKD调节线粒细胞衰变,以防止氧化应激和线粒体功能障碍
Ya-Ping Liu1, Bing He1, Wen-Xin Wang1
1College of Animal Science and Technology, Nanjing Agricultural University, Nanjing, China.
Mitochondrion
|August 15, 2024
概括
蛋白激酶D (PKD) 调节线粒细胞衰老,这是维持老化卵细胞中线粒体质量的关键过程. 抑制PKD会损害线粒体,导致线粒体功能障碍和减少卵细胞成熟.
科学领域:
- 细胞生物学 细胞生物学
- 生殖生物学 生殖生物学
- 线粒体生物学 线粒体生物学
背景情况:
- 线粒体对于细胞功能至关重要,通过线粒体细胞衰变控制它们的质量是必不可少的,特别是在衰老的卵细胞中,线粒体细胞衰变会导致功能障碍.
- 之前的研究表明,老化卵细胞中的蛋白激酶D (PKD) 表达减少,对卵细胞质量产生负面影响.
- PKD与自有关,这促使人们对其在线粒和卵细胞成熟中的作用进行调查.
研究的目的:
- 调查蛋白激酶D (PKD) 在调节线粒体的作用,以维持线粒体功能和支持卵细胞成熟的作用.
- 了解PKD抑制影响卵细胞质量和线粒体健康的分子机制.
主要方法:
- 用CID755673,一种强大的PKD抑制剂,治疗成熟的小鼠卵细胞.
- 评估介质性进展,稳定性,线粒体功能 (ATP产生,Ca2+稳定性,ROS水平) 和亡.
- 对与自相关的蛋白质酸化 (ULK) 和与髓相关的蛋白质表达 (Parkin) 的分析.
主要成果:
- 抑制PKD导致I元期中介性停止,并降低了螺旋的稳定性.
- 观察到线粒体功能障碍,包括减少ATP,改变Ca2+稳态,增加ROS,增强氧化应激诱导的亡和DNA损伤.
- 通过影响ULK酸化和降低帕金表达,PKD抑制降低了自,损害了线粒体和导致受损的线粒体积累.
结论:
- 蛋白激酶D (PKD) 在调节线粒细胞衰老中起着至关重要的作用,以维持线粒体功能并支持小鼠卵细胞成熟.
- 抑制PKD会破坏线粒细胞,导致线粒体功能障碍和卵细胞质量受损.
- 向PKD可能为改善卵细胞质量和解决女性与年龄相关的线粒体功能障碍提供了一种策略.
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