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dc.contributor.authorTomás-Zapico, Cristina-
dc.contributor.authorDíez-Zaera, M.-
dc.contributor.authorFerrer, Isidro-
dc.contributor.authorGómez-Ramos, Pilar-
dc.contributor.authorMorán, María A.-
dc.contributor.authorMiras Portugal, María Teresa-
dc.contributor.authorDíaz-Hernández, Miguel-
dc.contributor.authorLucas, José Javier-
dc.identifierdoi: 10.1093/hmg/ddr507-
dc.identifierissn: 0964-6906-
dc.identifier.citationHuman Molecular Genetics 21: 495- 510 (2012)-
dc.description.abstractHuntington's disease (HD) is the most common of nine inherited neurological disorders caused by expanded polyglutamine (polyQ) sequences which confer propensity to self-aggregate and toxicity to their corresponding mutant proteins. It has been postulated that polyQ expression compromises the folding capacity of the cell which might affect other misfolding-prone proteins. α-Synuclein (α-syn) is a small neural-specific protein with propensity to self-aggregate that forms Parkinson's disease (PD) Lewy bodies. Point mutations in α-syn that favor self-aggregation or α-syn gene duplications lead to familial PD, thus indicating that increased α-syn aggregation or levels are sufficient to induce neurodegeneration. Since polyQ inclusions in HD and other polyQ disorders are immunopositive for α-syn, we speculated that α-syn might be recruited as an additional mediator of polyQ toxicity. Here, we confirm in HD postmortem brains and in the R6/1 mouse model of HD the accumulation of α-syn in polyQ inclusions. By isolating the characteristic filaments formed by aggregation-prone proteins, we found that N-terminal mutant huntingtin (N-mutHtt) and α-syn form independent filamentous microaggregates in R6/1 mouse brain as well as in the inducible HD94 mouse model and that N-mutHtt expression increases the load of α-syn filaments. Accordingly, α-syn knockout results in a diminished number of N-mutHtt inclusions in transfected neurons and also in vivo in the brain of HD mice. Finally, α-syn knockout attenuates body weight loss and early motor phenotype of HD mice. This study therefore demonstrates that α-syn is a modifier of polyQ toxicity in vivo and raises the possibility that potential PD-related therapies aimed to counteract α-syn toxicity might help to slow HD. © The Author 2011. Published by Oxford University Press. All rights reserved.-
dc.description.sponsorshipSpanish Ministry of Science/MEC/MCINN; CiberNed; Comunidad Autónoma de Madrid; Fundación Ramón Areces-
dc.publisherOxford University Press-
dc.titleα-Synuclein accumulates in huntingtin inclusions but forms independent filaments and its deficiency attenuates early phenotype in a mouse model of Huntington's disease-
dc.description.versionPeer Reviewed-
dc.contributor.funderMinisterio de Educación y Ciencia (España)-
dc.contributor.funderMinisterio de Economía y Competitividad (España)-
dc.contributor.funderCentro Investigación Biomédica en Red Enfermedades Neurodegenerativas (España)-
dc.contributor.funderComunidad de Madrid-
dc.contributor.funderFundación Ramón Areces-
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