La maladie de Parkinson au Canada (serveur d'exploration)

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

Identifieur interne : 001496 ( Main/Exploration ); précédent : 001495; suivant : 001497

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

Auteurs : Maria Xilouri [Grèce] ; Elli Kyratzi [Grèce] ; Pothitos M. Pitychoutis [Grèce] ; Zoi Papadopoulou-Daifoti [Grèce] ; Celine Perier [Espagne] ; Miquel Vila [Espagne] ; Matina Maniati [Grèce] ; Ayse Ulusoy [Suède] ; Deniz Kirik [Suède] ; David S. Park [Canada] ; Keiji Wada [Japon] ; Leonidas Stefanis [Grèce]

Source :

RBID : Pascal:12-0122767

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English descriptors

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.


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<div type="abstract" xml:lang="en">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.</div>
</front>
</TEI>
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<li>Canada</li>
<li>Espagne</li>
<li>Grèce</li>
<li>Japon</li>
<li>Suède</li>
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<li>Catalogne</li>
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<li>Barcelone</li>
<li>Tokyo</li>
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<name sortKey="Maniati, Matina" sort="Maniati, Matina" uniqKey="Maniati M" first="Matina" last="Maniati">Matina Maniati</name>
<name sortKey="Papadopoulou Daifoti, Zoi" sort="Papadopoulou Daifoti, Zoi" uniqKey="Papadopoulou Daifoti Z" first="Zoi" last="Papadopoulou-Daifoti">Zoi Papadopoulou-Daifoti</name>
<name sortKey="Pitychoutis, Pothitos M" sort="Pitychoutis, Pothitos M" uniqKey="Pitychoutis P" first="Pothitos M." last="Pitychoutis">Pothitos M. Pitychoutis</name>
<name sortKey="Stefanis, Leonidas" sort="Stefanis, Leonidas" uniqKey="Stefanis L" first="Leonidas" last="Stefanis">Leonidas Stefanis</name>
<name sortKey="Stefanis, Leonidas" sort="Stefanis, Leonidas" uniqKey="Stefanis L" first="Leonidas" last="Stefanis">Leonidas Stefanis</name>
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<name sortKey="Perier, Celine" sort="Perier, Celine" uniqKey="Perier C" first="Celine" last="Perier">Celine Perier</name>
</region>
<name sortKey="Vila, Miquel" sort="Vila, Miquel" uniqKey="Vila M" first="Miquel" last="Vila">Miquel Vila</name>
<name sortKey="Vila, Miquel" sort="Vila, Miquel" uniqKey="Vila M" first="Miquel" last="Vila">Miquel Vila</name>
<name sortKey="Vila, Miquel" sort="Vila, Miquel" uniqKey="Vila M" first="Miquel" last="Vila">Miquel Vila</name>
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<name sortKey="Ulusoy, Ayse" sort="Ulusoy, Ayse" uniqKey="Ulusoy A" first="Ayse" last="Ulusoy">Ayse Ulusoy</name>
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<name sortKey="Park, David S" sort="Park, David S" uniqKey="Park D" first="David S." last="Park">David S. Park</name>
</noRegion>
</country>
<country name="Japon">
<noRegion>
<name sortKey="Wada, Keiji" sort="Wada, Keiji" uniqKey="Wada K" first="Keiji" last="Wada">Keiji Wada</name>
</noRegion>
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