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由DNase II缺乏引起的神经双链DNA积累驱动陶酸化和神经退行
Ling-Jie Li1,2, Xiao-Ying Sun1, Ya-Ru Huang1
1State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, 100190, China.
脱氧核糖酶II (DNase II) 缺乏导致细胞质DNA积累,促进阿尔茨海默病 (AD) 中的陶过酸化和神经退行. 恢复DNase II水平可能为陶病症提供治疗效益.
科学领域:
- 神经科学是一个神经科学.
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 脱氧核糖核酶II (DNase II) 对于清除细胞质双链DNA (dsDNA) 是至关重要的.
- DNase II 缺乏导致细胞质dDNA积累,这是神经元衰老和神经退行性疾病 (如阿尔茨海默氏症) 的标志.
- DNase II和dsDNA在阿尔茨海默病发病的确切作用,特别是在酸盐过酸化中,仍然不清楚.
研究的目的:
- 为了研究DNase II水平,细胞质dDNA和阿尔茨海默病中tau过酸化之间的关系.
- 探索DNase II作为tau相关神经退行性疾病的治疗标的潜力.
主要方法:
- 在野生型 (WT) 和Tau-P301S小鼠中测量了DNase II和dsDNA水平,并在AD患者的血中测量了DNase II.
- 评估了DNase II操纵 (缺乏或过度表达) 对老鼠大脑中陶酸化,激酶,酸酶,突触蛋白,化和细胞因子的影响.
- 在基因改造小鼠中使用标准行为测试评估认知功能.
主要成果:
- 在AD患者中,DNase II水平降低,在老鼠模型中随着年龄的增长而降低,与细胞质dDNA的增加相关.
- 神经元DNase II缺乏症通过改变激酶 (CDK5,CaMKII) 和酸酶 (PP2A) 活性而加剧酸化.
- 抑制DNase II会使神经炎症和认知缺陷恶化,而过度表达DNase II则表现出治疗效果.
结论:
- DNase II 缺乏和随后的细胞质 dsDNA 积累启动陶过酸化,有助于AD 病原体.
- DNase II 是一个有前途的治疗点,用于管理与相关的神经退行性疾病.
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