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RESEARCH PRODUCT
Huntingtin controls neurotrophic support and survival of neurons by enhancing BDNF vesicular transport along microtubules.
Sandrine HumbertJim DompierreMaria Borrell-pagèsMarcy E. MacdonaldJan De MeyBénédicte C. CharrinLaurent GauthierHélène RangoneFabrice P. CordelièresVolkmar LeßmannFrédéric Saudousubject
congenital hereditary and neonatal diseases and abnormalitiesHuntingtinCell SurvivalContext (language use)Nerve Tissue ProteinsMicrotubulesModels BiologicalGeneral Biochemistry Genetics and Molecular BiologyMiceNeurotrophic factorsmental disordersHuntingtin ProteinAnimalsCells CulturedNeuronsHuntingtin ProteinbiologyBiochemistry Genetics and Molecular Biology(all)Huntingtin-associated protein 1Brain-Derived Neurotrophic FactorCytoplasmic VesiclesBrainNuclear ProteinsBiological TransportDynactin ComplexCell biologynervous system diseasesVesicular transport proteinDNA-Binding ProteinsBiochemistrynervous systembiology.proteinDynactinMicrotubule-Associated ProteinsNeurotrophindescription
AbstractPolyglutamine expansion (polyQ) in the protein huntingtin is pathogenic and responsible for the neuronal toxicity associated with Huntington's disease (HD). Although wild-type huntingtin possesses antiapoptotic properties, the relationship between the neuroprotective functions of huntingtin and pathogenesis of HD remains unclear. Here, we show that huntingtin specifically enhances vesicular transport of brain-derived neurotrophic factor (BDNF) along microtubules. Huntingtin-mediated transport involves huntingtin-associated protein-1 (HAP1) and the p150Glued subunit of dynactin, an essential component of molecular motors. BDNF transport is attenuated both in the disease context and by reducing the levels of wild-type huntingtin. The alteration of the huntingtin/HAP1/p150Glued complex correlates with reduced association of motor proteins with microtubules. Finally, we find that the polyQ-huntingtin-induced transport deficit results in the loss of neurotrophic support and neuronal toxicity. Our findings indicate that a key role of huntingtin is to promote BDNF transport and suggest that loss of this function might contribute to pathogenesis.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2004-07-01 | Cell |