La maladie de Parkinson en France (serveur d'exploration)

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Loss of P-type ATPase ATP13A2/PARK9 function induces general lysosomal deficiency and leads to Parkinson disease neurodegeneration

Identifieur interne : 001104 ( Main/Exploration ); précédent : 001103; suivant : 001105

Loss of P-type ATPase ATP13A2/PARK9 function induces general lysosomal deficiency and leads to Parkinson disease neurodegeneration

Auteurs : Benjamin Dehay [France] ; Alfredo Ramirez [Allemagne] ; Marta Martinez-Vicente [Espagne] ; Celine Perier [Espagne] ; Marie-Hélène Canron [France] ; Evelyne Doudnikoff [France] ; Anne Vital [France] ; Miquel Vila [Espagne] ; Christine Klein [Allemagne] ; Erwan Bezard [France]

Source :

RBID : PMC:3386132

English descriptors

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:
DOI: 10.1073/pnas.1112368109
PubMed: 22647602
PubMed Central: 3386132


Affiliations:


Links toward previous steps (curation, corpus...)


Le document en format XML

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<p>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
<italic>ATP13A2</italic>
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.</p>
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<name sortKey="Canron, Marie Helene" sort="Canron, Marie Helene" uniqKey="Canron M" first="Marie-Hélène" last="Canron">Marie-Hélène Canron</name>
<name sortKey="Doudnikoff, Evelyne" sort="Doudnikoff, Evelyne" uniqKey="Doudnikoff E" first="Evelyne" last="Doudnikoff">Evelyne Doudnikoff</name>
<name sortKey="Vital, Anne" sort="Vital, Anne" uniqKey="Vital A" first="Anne" last="Vital">Anne Vital</name>
</country>
<country name="Allemagne">
<noRegion>
<name sortKey="Ramirez, Alfredo" sort="Ramirez, Alfredo" uniqKey="Ramirez A" first="Alfredo" last="Ramirez">Alfredo Ramirez</name>
</noRegion>
<name sortKey="Klein, Christine" sort="Klein, Christine" uniqKey="Klein C" first="Christine" last="Klein">Christine Klein</name>
</country>
<country name="Espagne">
<noRegion>
<name sortKey="Martinez Vicente, Marta" sort="Martinez Vicente, Marta" uniqKey="Martinez Vicente M" first="Marta" last="Martinez-Vicente">Marta Martinez-Vicente</name>
</noRegion>
<name sortKey="Perier, Celine" sort="Perier, Celine" uniqKey="Perier C" first="Celine" last="Perier">Celine Perier</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>
<name sortKey="Vila, Miquel" sort="Vila, Miquel" uniqKey="Vila M" first="Miquel" last="Vila">Miquel Vila</name>
</country>
</tree>
</affiliations>
</record>

Pour manipuler ce document sous Unix (Dilib)

EXPLOR_STEP=$WICRI_ROOT/Wicri/Sante/explor/ParkinsonFranceV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001104 | SxmlIndent | more

Ou

HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001104 | SxmlIndent | more

Pour mettre un lien sur cette page dans le réseau Wicri

{{Explor lien
   |wiki=    Wicri/Sante
   |area=    ParkinsonFranceV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     PMC:3386132
   |texte=   Loss of P-type ATPase ATP13A2/PARK9 function induces general lysosomal deficiency and leads to Parkinson disease neurodegeneration
}}

Pour générer des pages wiki

HfdIndexSelect -h $EXPLOR_AREA/Data/Main/Exploration/RBID.i   -Sk "pubmed:22647602" \
       | HfdSelect -Kh $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd   \
       | NlmPubMed2Wicri -a ParkinsonFranceV1 

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Data generation: Wed May 17 19:46:39 2017. Site generation: Mon Mar 4 15:48:15 2024