脱化酶UCH-L1调节神经元的Ca2+信号传递
Marie Perrier1, Desirée Loreth2, Johannes Brand2
1Université Grenoble Alpes, CNRS, CEA, Inserm, IRIG, BGE UA13, 17 rue des martyrs, F-38054 Grenoble Cedex, France.
ACS chemical neuroscience
|September 24, 2025
概括
调节细胞过程的称为二维基素酶 (DUBs) 的乌比基因修饰酶. 发现一种广谱DUB抑制剂PR-619通过抑制UCH-L1.1,减少 (Ca2+) 进入神经元.
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
- 生物化学 生物化学
背景情况:
- 乌比基因化是一种关键的翻译后修改,它调节了蛋白质命运.
- 脱化酶 (DUBs) 逆转泛化,平衡E3结合酶的活性.
- 在许多细胞过程中,DUBs起着至关重要的作用,包括蛋白质的贩运和降解.
研究的目的:
- 为了研究广谱DUB抑制剂PR-619在培养胚胎皮层神经元中通过电压通Ca2+通道 (VGCCs) 进入 (Ca2+) 的作用.
- 确定负责PR-619对神经元Ca2+流入的抑制作用的特定DUB.
- 阐明UCH-L1在神经元平衡中的作用.
主要方法:
- 基于Fura-2的Ca2+成像,以测量脱极化时的细胞体Ca2+变化.
- 使用PR-619,UCH-L1抑制剂 (IMP1710,GK13S),USP19抑制剂 (ADC141) 和UCH-L3抑制剂 (TCID) 的DUBs的药理抑制.
- 评估Ca2+储存能力和CaV1.2蛋白水平.
主要成果:
- PR-619显著降低了Ca2+的流入,主要是通过对二皮里丁敏感的 (L型) VGCC.
- PR-619的抑制作用对动氨酸和 lysosomal 途径抑制剂敏感.
- 选择性抑制UCH-L1 (使用IMP1710和GK13S) 模仿PR-619的影响,减少Ca2+吸收和CaV1.2蛋白水平,并损害神经元的Ca2+储存.
- 抑制USP19或UCH-L3并没有影响Ca2+流入.
结论:
- UCH-L1,一个主要的大脑DUB,在调节神经元Ca2+吸收和储存方面发挥着重要作用.
- 抑制UCH-L1会影响神经元的Ca2+稳态,影响CaV1.2蛋白水平和Ca2+储存.
- 这些发现突出了UCH-L1作为神经元动态的关键调节者,具有潜在的生理影响.
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