alpha-Synuclein abnormalities in mouse models of peroxisome biogenesis disorders.

alpha-Synuclein abnormalities in mouse models of peroxisome biogenesis disorders.
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DOI:
10.1002/jnr.22246
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发表时间:
2010-03
影响因子:
4.2
通讯作者:
Sharon, Ronit
Sharon, Ronit
中科院分区:
医学3区
文献类型:
--
作者:
Yakunin, Eugenia;Moser, Ann;Loeb, Virginie;Saada, Ann;Faust, Phyllis;Crane, Denis I.;Baes, Myriam;Sharon, Ronit

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α -突触核蛋白(αS)是一种与帕金森病(PD)有关的突触前蛋白。越来越多的证据表明,线粒体功能障碍、氧化应激和αS-脂质相互作用导致αS在致病性形式中逐渐积累,并在路易体中沉积,这是PD和相关突触核蛋白病的病理标志。以齐薇格综合征为原型的过氧化物酶体生物发生障碍(PBD)以过氧化物酶体畸形和功能受损为特征。本研究利用PBD小鼠模型Pex2-/-、Pex5-/-和Pex13-/-,研究过氧化物酶体功能障碍对α s相关发病机制的潜在影响。我们发现在这些PBD小鼠模型中αS寡聚化和磷酸化增加,其在细胞质包涵体中的沉积增加。此外,我们发现αS异常与脂质代谢的改变有关,特别是与PBD模型中出现的长链n-6多不饱和脂肪酸的积累有关。
alpha-Synuclein (αS) is a presynaptic protein implicated in Parkinson’s disease (PD). Growing evidence implicates mitochondrial dysfunction, oxidative stress and αS-lipids interactions in the gradual accumulation of αS in pathogenic forms and its deposition in Lewy bodies, the pathological hallmark of PD and related synucleinopathies. The peroxisomal biogenesis disorders (PBD), with Zellweger syndrome serving as the prototype of this group, are characterized by malformed and functionally impaired peroxisomes. Here we utilized the PBD mouse models, Pex2-/-, Pex5-/- and Pex13-/-, to study the potential effects of peroxisomal dysfunction on αS–related pathogenesis. We found increased αS oligomerization and phosphorylation and its increased deposition in cytoplasmic inclusions in these PBD mouse models. Further, we show that αS abnormalities correlate with the altered lipid metabolism and specifically, with accumulation of long chain, n-6 polyunsaturated fatty acids, that occurs in the PBD models.
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