Wild-type and mutant SOD1 share an aberrant conformation and a common pathogenic pathway in ALS.

Wild-type and mutant SOD1 share an aberrant conformation and a common pathogenic pathway in ALS.
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DOI:
10.1038/nn.2660
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发表时间:
2010-11
影响因子:
25
通讯作者:
Brown, Robert H., Jr.
Brown, Robert H., Jr.
中科院分区:
医学1区
文献类型:
--
作者:
Bosco, Daryl A.;Morfini, Gerardo;Karabacak, N. Murat;Song, Yuyu;Gros-Louis, Francois;Pasinelli, Piera;Goolsby, Holly;Fontaine, Benjamin A.;Lemay, Nathan;McKenna-Yasek, Diane;Frosch, Matthew P.;Agar, Jeffrey N.;Julien, Jean-Pierre;Brady, Scott T.;Brown, Robert H., Jr.

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许多突变赋予铜/锌超氧化物歧化酶-1(SOD1)一种或多种毒性功能,其损害运动神经元活力并引起家族性肌萎缩侧索硬化(FALS)。使用构象特异性抗体,检测错误折叠的SOD1(C4F6),我们证明,氧化的WT-SOD1和muplant-SOD1共享一个构象表位,不存在于正常WT-SOD1。在人类散发性ALS(SALS)病例的一个子集中,腰骶脊髓运动神经元显示出惊人的C4F6免疫反应性,表明存在异常的WT-SOD 1种类。从SALS组织免疫纯化的重组氧化WT-SOD 1和WT-SOD 1以类似于FALS相关突变SOD 1的方式抑制基于驱动蛋白的快速轴突转运。这里的研究表明,WT-SOD 1可以在SALS中致病,并确定了一种常见于FALS和SALS的SOD 1依赖性致病机制。
Many mutations confer upon copper/zinc superoxide dismutase-1 (SOD1) one or more toxic function(s) that impair motor neuron viability and cause familial amyotrophic lateral sclerosis (FALS). Using a conformation-specific antibody that detects misfolded SOD1 (C4F6), we demonstrate that oxidized WT-SOD1 and mutant-SOD1 share a conformational epitope that is not present in normal WT-SOD1. In a subset of human sporadic ALS (SALS) cases, motor neurons in the lumbosacral spinal cord displayed striking C4F6 immunoreactivity, denoting the presence of aberrant WT-SOD1 species. Recombinant, oxidized WT-SOD1 and WT-SOD1 immunopurified from SALS tissues inhibited kinesin-based fast axonal transport in a manner similar to FALS-linked mutant SOD1. Studies here suggest that WT-SOD1 can be pathogenic in SALS and identifies an SOD1-dependent pathogenic mechanism common to FALS and SALS.
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