VCP suppresses proteopathic seeding in neurons.

Autor: Zhu J; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., Pittman S; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., Dhavale D; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., French R; Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, USA., Patterson JN; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., Kaleelurrrahuman MS; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., Sun Y; Medical Research Council Prion Unit / UCL Institute of Prion Diseases, University College London, London, UK., Vaquer-Alicea J; Center for Alzheimer's and Neurodegenerative Diseases, Peter O' Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA., Maggiore G; Center for Alzheimer's and Neurodegenerative Diseases, Peter O' Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA., Clemen CS; Institute of Aerospace Medicine, German Aerospace Center, Cologne, Germany.; Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, Medical Faculty, University of Cologne, Cologne, Germany., Buscher WJ; Department of Genetics, Washington University School of Medicine, St. Louis, MO, USA., Bieschke J; Medical Research Council Prion Unit / UCL Institute of Prion Diseases, University College London, London, UK., Kotzbauer P; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., Ayala Y; Edward A. Doisy Department of Biochemistry and Molecular Biology, Saint Louis University School of Medicine, St. Louis, MO, USA., Diamond MI; Center for Alzheimer's and Neurodegenerative Diseases, Peter O' Donnell Jr. Brain Institute, University of Texas Southwestern Medical Center, Dallas, TX, USA., Davis AA; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA., Weihl C; Department of Neurology, Hope Center for Neurological Diseases, Washington University School of Medicine, St Louis, MO, 63110, USA. weihlc@wustl.edu.
Jazyk: angličtina
Zdroj: Molecular neurodegeneration [Mol Neurodegener] 2022 Apr 12; Vol. 17 (1), pp. 30. Date of Electronic Publication: 2022 Apr 12.
DOI: 10.1186/s13024-022-00532-0
Abstrakt: Background: Neuronal uptake and subsequent spread of proteopathic seeds, such as αS (alpha-synuclein), Tau, and TDP-43, contribute to neurodegeneration. The cellular machinery participating in this process is poorly understood. One proteinopathy called multisystem proteinopathy (MSP) is associated with dominant mutations in Valosin Containing Protein (VCP). MSP patients have muscle and neuronal degeneration characterized by aggregate pathology that can include αS, Tau and TDP-43.
Methods: We performed a fluorescent cell sorting based genome-wide CRISPR-Cas9 screen in αS biosensors. αS and TDP-43 seeding activity under varied conditions was assessed using FRET/Flow biosensor cells or immunofluorescence for phosphorylated αS or TDP-43 in primary cultured neurons. We analyzed in vivo seeding activity by immunostaining for phosphorylated αS following intrastriatal injection of αS seeds in control or VCP disease mutation carrying mice.
Results: One hundred fifty-four genes were identified as suppressors of αS seeding. One suppressor, VCP when chemically or genetically inhibited increased αS seeding in cells and neurons. This was not due to an increase in αS uptake or αS protein levels. MSP-VCP mutation expression increased αS seeding in cells and neurons. Intrastriatal injection of αS preformed fibrils (PFF) into VCP-MSP mutation carrying mice increased phospho αS expression as compared to control mice. Cells stably expressing fluorescently tagged TDP-43 C-terminal fragment FRET pairs (TDP-43 biosensors) generate FRET when seeded with TDP-43 PFF but not monomeric TDP-43. VCP inhibition or MSP-VCP mutant expression increases TDP-43 seeding in TDP-43 biosensors. Similarly, treatment of neurons with TDP-43 PFFs generates high molecular weight insoluble phosphorylated TDP-43 after 5 days. This TDP-43 seed dependent increase in phosphorlyated TDP-43 is further augmented in MSP-VCP mutant expressing neurons.
Conclusion: Using an unbiased screen, we identified the multifunctional AAA ATPase VCP as a suppressor of αS and TDP-43 aggregate seeding in cells and neurons. VCP facilitates the clearance of damaged lysosomes via lysophagy. We propose that VCP's surveillance of permeabilized endosomes may protect against the proteopathic spread of pathogenic protein aggregates. The spread of distinct aggregate species may dictate the pleiotropic phenotypes and pathologies in VCP associated MSP.
(© 2022. The Author(s).)
Databáze: MEDLINE
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