Late onset of motor neurons in mice overexpressing wild-type peripherin.

Late onset of motor neurons in mice overexpressing wild-type peripherin.
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过表达野生型外围蛋白的小鼠运动神经元的晚期发作。

DOI:
10.1083/jcb.147.3.531
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发表时间:
1999-11-01
影响因子:
7.8
通讯作者:
Julien, J P
Julien, J P
中科院分区:
生物学1区
文献类型:
--
作者:
Beaulieu, J M;Nguyen, M D;Julien, J P

文献摘要

被引文献

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外周蛋白是一种 III 型中间丝 (IF) 蛋白,受损伤和炎症细胞因子上调,是与散发性肌萎缩侧索硬化症 (ALS) 中运动神经元退化相关的 IF 包涵体的组成部分。我们在此报告,小鼠中野生型外周蛋白的持续过度表达会在衰老过程中引起运动轴突的大规模和选择性退化。值得注意的是,外周蛋白介导的疾病的发作是由神经丝轻蛋白(NF-L)蛋白的缺乏引起的,这种现象与散发性 ALS 相关。在 NF-L 缺失小鼠中,外周蛋白的过度表达导致 IF 包涵体的早期形成,并导致 6 个月龄时脊髓运动神经元的选择性死亡。我们还报道了在表达与 ALS 相关的超氧化物歧化酶突变形式的症状前转基因小鼠中类似外周蛋白包涵体的形成。综上所述,这些结果表明含有外周蛋白的 IF 内含物可能在运动神经元疾病中发挥重要作用。
Peripherin, a type III intermediate filament (IF) protein, upregulated by injury and inflammatory cytokines, is a component of IF inclusion bodies associated with degenerating motor neurons in sporadic amyotrophic lateral sclerosis (ALS). We report here that sustained overexpression of wild-type peripherin in mice provokes massive and selective degeneration of motor axons during aging. Remarkably, the onset of peripherin-mediated disease was precipitated by a deficiency of neurofilament light (NF-L) protein, a phenomenon associated with sporadic ALS. In NF-L null mice, the overexpression of peripherin led to early- onset formation of IF inclusions and to the selective death of spinal motor neurons at 6 mo of age. We also report the formation of similar peripherin inclusions in presymptomatic transgenic mice expressing a mutant form of superoxide dismutase linked to ALS. Taken together, these results suggest that IF inclusions containing peripherin may play a contributory role in motor neuron disease.