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Distinct functional roles of Vps41-mediated neuroprotection in Alzheimer's and Parkinson's disease models of neurodegeneration.
Griffin, Edward F; Yan, Xiaohui; Caldwell, Kim A; Caldwell, Guy A.
Afiliação
  • Griffin EF; Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL, USA.
  • Caldwell KA; Department of Biological Sciences, The University of Alabama, Tuscaloosa, AL, USA.
  • Caldwell GA; Departments of Neurology and Neurobiology, Center for Neurodegeneration and Experimental Therapeutics, Nathan Shock Center for Research on the Basic Biology of Aging, University of Alabama at Birmingham School of Medicine, Birmingham, AL, USA.
Hum Mol Genet ; 27(24): 4176-4193, 2018 12 15.
Article em En | MEDLINE | ID: mdl-30508205
Commonalities and, in some cases, pathological overlap between neurodegenerative diseases have led to speculation that targeting of underlying mechanisms might be of potentially shared therapeutic benefit. Alzheimer's disease is characterized by the formation of plaques, composed primarily of the amyloid-ß 1-42 (Aß) peptide in the brain, resulting in neurodegeneration. Previously, we have shown that overexpression of the lysosomal-trafficking protein, human Vps41 (hVps41), is neuroprotective in a transgenic worm model of Parkinson's disease, wherein progressive dopaminergic neurodegeneration is induced by α-synuclein overexpression. Here, we report the results of a systematic comparison of hVps41-mediated neuroprotection between α-synuclein and Aß in transgenic nematode models of Caenorhabditis elegans. Our results indicate that an ARF-like GTPase gene product, ARL-8, mitigates endocytic Aß neurodegeneration in a VPS-41-dependent manner, rather than through RAB-7 and AP3 as with α-synuclein. Furthermore, the neuroprotective effect of ARL-8 or hVps41 appears to be dependent on their colocalization and the activity of ARL-8. Additionally, we demonstrate that the LC3 orthologue, LGG-2, plays a critical role in Aß toxicity with ARL-8. Further analysis of functional effectors of Aß protein processing via the lysosomal pathway will assist in the elucidation of the underlying mechanism involving VPS-41-mediated neuroprotection. These results reveal functional distinctions in the intracellular management of neurotoxic proteins that serve to better inform the path for development of therapeutic interventions to halt neurodegeneration.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Doença de Parkinson / Fatores de Ribosilação do ADP / Proteínas de Caenorhabditis elegans / Proteínas de Transporte Vesicular / Doença de Alzheimer / Proteínas de Membrana / Proteínas Associadas aos Microtúbulos Tipo de estudo: Prognostic_studies Limite: Animals / Humans Idioma: En Ano de publicação: 2018 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Doença de Parkinson / Fatores de Ribosilação do ADP / Proteínas de Caenorhabditis elegans / Proteínas de Transporte Vesicular / Doença de Alzheimer / Proteínas de Membrana / Proteínas Associadas aos Microtúbulos Tipo de estudo: Prognostic_studies Limite: Animals / Humans Idioma: En Ano de publicação: 2018 Tipo de documento: Article