在亨廷顿病中,全球变化对全域素系统的变化
Eric J Bennett1, Thomas A Shaler, Ben Woodman
1Department of Biological Sciences, Stanford University, Stanford, California 94305, USA.
Nature
|August 10, 2007
概括
亨廷顿氏病 (HD) 涉及到多基因链的脑积累,表明基因蛋白酶系统 (UPS) 功能受损. 这种功能障碍是HD病理的早期和一致特征,在小鼠模型和人类患者中都是如此.
科学领域:
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
- 生物化学 生物化学
背景情况:
- 亨廷顿病 (HD) 是一种神经退行性疾病,由亨廷丁 (HTT) 基因的CAG重复扩张引起.
- 包容体中乌比基的积累表明,乌比基代谢功能障碍在HD病变发生过程中起着作用.
- 无素蛋白酶体系统 (UPS) 调节关键的细胞过程,但其在 Huntington 疾病中的作用仍有争议.
研究的目的:
- 为了研究UPS在亨廷顿病病原体中的功能.
- 为了确定UPS功能障碍是否是HD病理学的一致特征.
- 在HD中识别UPS功能障碍的潜在生物标志物.
主要方法:
- 利用基于质谱的方法量化聚比基链.
- 分析了来自R6/2转基因小鼠,HD小鼠模型和人类HD患者的大脑组织.
- 测量了不同类型的多比基链 (Lys 48,Lys 63,Lys 11-链接) 的丰度.
主要成果:
- 在所有研究的模型中,在疾病发病的早期观察到Lys 48链接的多比基因链的积累.
- 这种积累可以作为HD中UPS功能障碍的可靠内源生物标志物.
- 在R6/2小鼠模型中,Lys 63和Lys 11连接的聚比奎丁链也积累了.
结论:
- UPS功能障碍是亨廷顿病病理学的一致和早期特征.
- 在HD中,泛素系统的全球变化比以前认为的更为广泛.
- 这些发现凸显了UPS作为HD的潜在治疗点.
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