亨廷丁和氨酸-1对cbp介导的转录的干扰导致细胞毒性
F C Nucifora1, M Sasaki, M F Peters
1Division of Neurobiology, Department of Psychiatry, The Johns Hopkins University School of Medicine, Baltimore, MD 21205-2196, USA.
Science (New York, N.Y.)
|March 27, 2001
概括
在亨廷顿病中,扩大的多重胺重复破坏了CREB结合蛋白 (CBP) 的功能,导致神经元退化. 恢复CBP水平可以防止这种毒性,这表明CBP在疾病发病过程中起着关键作用.
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:
- 扩展的多重胺重复与亨廷顿病 (HD) 中的神经元退化有关.
- 这些重复可能与含有短多重胺通道的蛋白质相互作用,例如CREB结合蛋白 (CBP).
研究的目的:
- 为了研究扩展的多重胺重复和CBP在HD病变发生过程中的相互作用.
- 确定CBP功能障碍是否有助于HD中神经元毒性.
主要方法:
- 检查了HD细胞培养模型,HD转基因小鼠和人类死后脑组织中的CBP局部化.
- 评估了扩展型多聚胺对CBP激活基因转录的影响.
- 研究了CBP过度表达对多重胺诱导的神经毒性的影响.
主要成果:
- 发现CBP从其核位置被耗尽,并聚集在多重氨酸含量中.
- 扩展的多重氨酸重复被证明会干扰CBP激活的基因转录.
- 过度表达CBP显著挽救了多重胺诱导的神经元毒性.
结论:
- 聚聚胺中介干扰CBP调节的基因转录是一种潜在的机制,是聚聚胺乱病原体的潜在机制.
- CBP功能障碍是亨廷顿病中观察到的神经元退化的一个关键因素.
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