MovDisordV3, Hal, Curation, bibRecord, 000066

Toward an animal model of restless legs syndrome?

Identifieur interne : 000066 ( Hal/Curation ); précédent : 000065; suivant : 000067

Toward an animal model of restless legs syndrome?

Auteurs : Imad Ghorayeb [France] ; Erwan Bezard [France]

Source :

Movement Disorders [ 0885-3185 ] ; 2012-02-29.

RBID : Hal:hal-01218090

Abstract

Parkinson disease (PD) is a progressive neurodegenerative disorder pathologically characterized by the loss of dopaminergic neurons from the substantia nigra pars compacta and the presence, in affected brain regions, of protein inclusions named Lewy bodies (LBs). The ATP13A2 gene (locus PARK9) encodes the protein ATP13A2, a lysosomal type 5 P-type ATPase that is linked to autosomal recessive familial parkinsonism. The physiological function of ATP13A2, and hence its role in PD, remains to be elucidated. Here, we show that PD-linked mutations in ATP13A2 lead to several lysosomal alterations in ATP13A2 PD patient-derived fibroblasts, including impaired lysosomal acidification, decreased proteolytic processing of lysosomal enzymes, reduced degradation of lysosomal substrates, and diminished lysosomal-mediated clearance of autophagosomes. Similar alterations are observed in stable ATP13A2-knockdown dopaminergic cell lines, which are associated with cell death. Restoration of ATP13A2 levels in ATP13A2-mutant/depleted cells restores lysosomal function and attenuates cell death. Relevant to PD, ATP13A2 levels are decreased in dopaminergic nigral neurons from patients with PD, in which ATP13A2 mostly accumulates within Lewy bodies. Our results unravel an instrumental role of ATP13A2 deficiency on lysosomal function and cell viability and demonstrate the feasibility and therapeutic potential of modulating ATP13A2 levels in the context of PD.

Url:

https://hal.archives-ouvertes.fr/hal-01218090

DOI: 10.1002

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Movement Disorders (revue)

Toward an animal model of restless legs syndrome?

Toward an animal model of restless legs syndrome?

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Abstract

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