蛋白毒性修饰基因的深度测序揭示了一种在α-synucleinopathies中共享的Presenilin-2/beta-amyloid-actin遗传风险模块
Sumaiya Nazeen1,2,3, Xinyuan Wang1, Dina Zielinski1,4
1Division of Movement Disorders, Department of Neurology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA.
bioRxiv : the preprint server for biology
|March 18, 2024
概括
这项研究揭示了共享的遗传风险因素和像帕金森病和阿尔茨海默病这样的α-synucleinopathies之间的融合机制,突出了actin细胞骨架调节和PSEN2在神经退行中的作用.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 神经退行性疾病通常涉及蛋白质错折,但不同蛋白质病变的共同遗传驱动因素仍然不清楚.
- 传统的遗传研究缺乏识别对蛋白质聚合的微妙遗传影响的能力.
研究的目的:
- 研究共享的遗传风险因素和α-synucleinopathies (帕金森病,莱维体痴呆症,多系统缩) 和阿尔茨海默病之间的机制联系.
- 识别修改α-synuclein (aS) 和β-amyloid (Aβ) 毒性的基因及其在神经退行性疾病风险中的作用.
主要方法:
- 在患有α-synucleinopathies的患者中,对430个aS/Aβ修饰基因进行深度外基因测序.
- 已知阿尔茨海默病 (AD) 和帕金森病 (PD) 风险基因中的遗传变异的分析.
- 利用诱导多能干细胞 (iPSC) 模型和全基因组CRISPR屏幕来评估基因功能和病理.
主要成果:
- 确定了跨同核蛋白病变的共享风险因素,包括AD基因 (CD33,CR1,PSEN2) 和动因细胞骨架调节器 (ARGHEF1,ARHGEF28,MICAL3,PASK,PKN2,PSEN2).
- 在iPSC模型中证明了actin病理,RhoA降低调节加剧了aS病理.
- 在人类神经元中,PSEN2是必不可少的,与AD病理学独立的扩散性同核病变有关,并对PD GWAS信号作出贡献.
结论:
- 融合分子机制存在于不同的蛋白质病变中,包括同核蛋白病变和AD.
- 乙细胞骨和PSEN2在突核蛋白病变的发病过程中起着重要作用,并代表潜在的治疗点.
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