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西斯普拉丁诱导的APE2过度表达会破坏MYH9功能并导致听力损失
Qingzhu Wang1, Eric E Irons1,2, Wanying Zhang1
1Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, Ohio.
Cancer research communications
|June 4, 2025
概括
西斯普拉丁化疗导致听力损失通过增加apurinic/apyrimidinic内核酶 (APE) 2在. 准APE2可能会预防癌症患者这种常见的副作用.
科学领域:
- 生物化学 生物化学
- 耳毒性研究研究
- 癌症治疗方法 癌症治疗方法
背景情况:
- 西斯是一种重要的化疗药物,但会引起严重的毒性,特别是耳毒性,特别是在儿童中.
- 目前用于预防西斯普拉丁诱导性听力损失 (C-HL) 的策略是无效的,并且尚未完全理解潜在机制.
- 以前的研究表明,阿普里尼克/阿普里米尼克内核酶 (APE) 2与西斯普拉丁诱导的损伤有关.
研究的目的:
- 调查APE2在西斯普拉丁引起的听力损失 (C-HL) 中的作用.
- 阐明APE2对C-HL.产生贡献的分子机制.
- 探索APE2作为预防C-HL.的潜在治疗点.
主要方法:
- 在西斯普拉丁治疗后,在小鼠和人类耳细胞中评估APE2和APE1表达.
- 利用一种可诱导的,外皮毛细胞特异的APE2转基因小鼠模型.
- 使用生化和成像技术研究了APE2和MYH9之间的相互作用.
- 研究了APE2敲击对线粒体功能和耳细胞中亡的影响.
- 分析了ATR-p53信号通路的参与.
主要成果:
- 西斯普拉丁选择性诱导APE2,而不是APE1,在外发细胞中的过度表达.
- 单独在外部毛细胞中过度表达APE2会导致听力损失,毛细胞损失和立体组织障碍.
- 确定了APE2和MYH9之间的直接相互作用,并绘制了特定的结合域.
- 通过APE2的淘汰,维护了线粒体新陈代谢,并保护了耳细胞免受西斯胺诱导的亡.
- 耗尽APE2激活了ATR-p53轴,抑制了亡.
结论:
- 一种非正规的,依赖于APE2的机制驱动着西斯普拉丁诱导的听力损失.
- APE2与MYH9相互作用,破坏线粒体的完整性,导致耳细胞死亡.
- 针对APE2是一个有希望的新疗法策略,用于预防C-HL.
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