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Selective neuroprotective effects of the S18Y polymorphic variant of UCH-L1 in the dopaminergic system.

Abstract：

:Genetic studies have implicated the neuronal ubiquitin C-terminal hydrolase (UCH) protein UCH-L1 in Parkinson's disease (PD) pathogenesis. Moreover, the function of UCH-L1 may be lost in the brains of PD and Alzheimer's disease patients. We have previously reported that the UCH-L1 polymorphic variant S18Y, potentially protective against PD in population studies, demonstrates specific antioxidant functions in cell culture. Albeit genetic, biochemical and neuropathological data support an association between UCH-L1, PD, synaptic degeneration and oxidative stress, the relationship between the dopaminergic system and UCH-L1 status remains obscure. In the current study, we have examined the dopaminergic system of mice lacking endogenous UCH-L1 protein (gracile axonal dystrophy mice). Our findings show that the lack of wild-type (WT) UCH-L1 does not influence to any significant degree the dopaminergic system at baseline or following injections of the neurotoxin methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP). Furthermore, using a novel intrastriatal adenoviral injection protocol, we have found that mouse nigral neurons retrogradely transduced with S18Y UCH-L1, but not the WT protein, are significantly protected against MPTP toxicity. Overall, these data provide evidence for an antioxidant and neuroprotective effect of the S18Y variant of UCH-L1, but not of the WT protein, in the dopaminergic system, and may have implications for the pathogenesis of PD or related neurodegenerative conditions, in which oxidative stress might play a role.

journal_name

Hum Mol Genet

journal_title

Human molecular genetics

authors

Xilouri M,Kyratzi E,Pitychoutis PM,Papadopoulou-Daifoti Z,Perier C,Vila M,Maniati M,Ulusoy A,Kirik D,Park DS,Wada K,Stefanis L

doi

10.1093/hmg/ddr521

subject

Has Abstract

pub_date

2012-02-15 00:00:00

pages

874-89

issue

4

eissn

0964-6906

issn

1460-2083

pii

ddr521

journal_volume

21

pub_type

杂志文章

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