基础科学和病原发生学
Xu-Qiao Chen1, Xinxin Zuo1, Hien T Zhao2
1University of California San Diego, La Jolla, CA, USA.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|December 23, 2025
概括
唐氏综合征 (DS) 通过内分泌体网络 (ELN) 和自功能障碍加速阿尔茨海默病 (AD) 风险. 准APP或Rab5可以使ELN功能正常化,并减轻DS-AD病理.
科学领域:
- 神经科学是一个神经科学.
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 唐氏综合征 (DS) 显著提高了阿尔茨海默病 (AD) 的风险.
- 内分泌体网络 (ELN) 和自途径功能障碍是DS-AD病变发生的核心原因.
- 在DS-AD中RAB5过活化的作用尚未完全理解.
研究的目的:
- 研究APP基因剂量对ELN和DS的自的影响.
- 澄清RAB5过激活在DS-AD中的作用.
- 评估针对APP或Rab5.5的治疗潜力.
主要方法:
- 从DS,DS-AD个体和DP16DS小鼠模型中检查了死后的大脑样本.
- 评估了RAB5,RAB7,RAB11激活,它们的GEFs,cathepsins和自标志物.
- 用APP和Rab5特有的反感小核酸 (ASO) 治疗DP16小鼠.
主要成果:
- DS和DP16的大脑显示ELN功能障碍与RAB5过度激活,RAB7/11活动增加,GEFs升高和cathepsins,所有依赖APP剂量.
- 损伤的自与降低TSC1/2和mTOR过酸化有关.
- 在Dp16小鼠中,ASO治疗使ELN功能正常化,改善了自,并减少了DS-AD病理.
结论:
- APP剂量驱动的RAB5过激活破坏了DS中的ELN和自.
- 准APP或Rab5在DS-AD中恢复细胞功能方面显示出希望.
- 这项研究强调了APP在DS-AD病变发生过程中的作用以及潜在的治疗途径.
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