衰老期间的中粒体不活化可以在人类细胞中得到挽救
bioRxiv : the preprint server for biology
|February 5, 2024
概括
由于表观遗传变化,衰老的人类细胞显示中心蛋白CENP-A的减少. 双重抑制p53和LSD1/KDM1A重新激活细胞中体,使细胞复原.
科学领域:
- 细胞衰老 细胞衰老
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 分子生物学分子生物学
背景情况:
- 衰老的特点是遗传,表观遗传和生理变化,包括失去了异染色素和降低了基因素水平.
- 在细胞衰老过程中,对染色体分离至关重要的中间体受到了影响.
- 中心基质组素H3变体CENP-A在中心基质功能中起着至关重要的作用.
研究的目的:
- 为了研究在人类细胞衰老期间的中间体的命运.
- 阐明衰老细胞中中心层功能障碍背后的机制.
- 探索减轻与年龄相关的中粒体失活的策略.
主要方法:
- 在老化的人类细胞中跟踪中心分子动力学.
- 评估CENP-A水平和p53依赖的法规.
- 研究涉及氨酸特异性去甲基酶1 (LSD1/KDM1A) 在中心体上的表观遗传机制.
- 评估p53和LSD1/KDM1A的双抑制的影响.
主要成果:
- 在老化的细胞中,CENP-A以p53依赖的方式下调.
- 通过LSD1/KDM1A招募抑制中心非编码转录的表观遗传抑制抑制了新的CENP-A加载.
- 双重抑制p53和LSD1/KDM1A恢复中心蛋白水平和转录.
- 通过这种双重抑制,可以实现衰老细胞的线粒细胞再生.
结论:
- 衰老会通过一种涉及p53和LSD1/KDM1A的新型表观遗传机制导致中心体无活化.
- 这种机制抑制了CENP-A的加载和中心转录.
- 向p53和LSD1/KDM1A提供了一种潜在的策略,以重新激活中间体和复原老化的细胞.
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