Hsp110 mitigates α-synuclein pathology in vivo
Abstract
Parkinson’s disease is characterized by the aggregation of the presynaptic protein α-synuclein and its deposition into pathologic Lewy bodies. While extensive research has been carried out on mediators of α-synuclein aggregation, molecular facilitators of α-synuclein disaggregation are still generally unknown. We investigated the role of molecular chaperones in both preventing and disaggregating α-synuclein oligomers and fibrils, with a focus on the mammalian disaggregase complex. Here, we show that overexpression of the chaperone Hsp110 is sufficient to reduce α-synuclein aggregation in a mammalian cell culture model. Additionally, we demonstrate that Hsp110 effectively mitigates α-synuclein pathology in vivo through the characterization of transgenic Hsp110 and double-transgenic α-synuclein/Hsp110 mouse models. Unbiased analysis of the synaptic proteome of these mice revealed that overexpression of Hsp110 can override the protein changes driven by the α-synuclein transgene. Furthermore, overexpression of Hsp110 is sufficient to prevent endogenous α-synuclein templating and spread following injection of aggregated α-synuclein seeds into brain, supporting a role for Hsp110 in the prevention and/or disaggregation of α-synuclein pathology.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 04, 2019
- Source ID
- 10.1073/pnas.1903268116
Entities
People
- Arthur L. Horwich
- Drake Thrasher
- Erica L. Gorenberg
- Laura A Volpicelli-Daley
- Maria Nagy
- Sreeganga S Chandra
- Wayne A. Fenton
- Yumiko V Taguchi
Organizations
- Congressionally Directed Medical Research Programs
- Howard Hughes Medical Institute
- National Institute of Neurological Disorders and Stroke
- The Michael J. Fox Foundation
- University of Alabama
- Yale University