阿尔法-同核素通过与BAF复合体相互作用,促进PRMT5介导的H4R3me2s基因组甲基化
Takaaki Nakamura1,2, Naoto Sugeno1, Takafumi Hasegawa1
1Division of Neurology, Department of Neuroscience & Sensory Organs, Tohoku University Graduate School of Medicine, Sendai, Japan.
The FEBS journal
|December 18, 2023
概括
核中的α-synuclein (αS) 与染色体重塑剂相互作用,通过改变基因组甲基化和降低NRCAM调节来破坏帕金森病模型中的神经元分化. 这突显了αS在神经退行过程中的核功能.
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
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 阿尔法-同核素 (αS) 涉及帕金森病的发病,新出现的证据表明,除了其已知的细胞质功能之外,其还有核作用.
- 过度表达αS与表观基因组变化有关,促使对其核相互作用和病理意义进行调查.
研究的目的:
- 阐明核αS的功能作用及其在帕金森病中的病理影响.
- 识别与αS相互作用的核蛋白,并了解它们对αS介导的细胞变化的贡献.
主要方法:
- 利用稳定表达αS的HEK293细胞通过纳米级液态染色学/并联质谱学进行互动原子分析,以确定核蛋白合作伙伴.
- 在神经元分化的SH-SY5Y细胞中进行了转录基因分析和染色体免疫沉降测序 (ChIP-seq),这些细胞过度表达αS.
- 使用来自基因表达综合 (GEO) 数据库的公开可用的数据集验证的发现.
主要成果:
- 确定了αS与BRG1关联因子 (BAF) 复合体和蛋白质阿尔金因甲基转移酶5 (PRMT5) 之间的相互作用.
- 证明αS过度表达扰乱了BAF复合物的成熟,通过增强的BAF-PRMT5相互作用增加了基因素H4R3me2s甲基化.
- 确认的αS和PRMT5对神经元细胞粘附分子 (NRCAM) 基因产生负面调节,影响神经元分化.
结论:
- 核αS与BAF复合体和PRMT5相互作用,导致帕金森病模型中的表观基因组变化.
- αS-BAF-PRMT5轴调节失调了基因素甲基化和NRCAM表达,可能会损害神经元分化并导致神经退行.
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