Synaptic vesicle glycoprotein 2C enhances vesicular storage of dopamine and counters dopaminergic toxicity.

Autor: Bucher ML; Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA., Dunn AR; Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.; The Jackson Laboratory, Bar Harbor, Maine, USA., Bradner JM; Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA.; Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.; AbbVie CRC, Cambridge, Massachusetts, USA., Egerton KS; Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.; School of Education and Health Sciences, North Central College, Naperville, Illinois, USA., Burkett JP; Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.; Department of Neurosciences, University of Toledo College of Medicine, Toledo, Ohio, USA., Johnson MA; Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.; College of Arts and Sciences, Oberlin College, Oberlin, Ohio, USA., Miller GW; Department of Environmental Health Sciences, Mailman School of Public Health, Columbia University, New York, New York, USA.; Department of Environmental Health, Rollins School of Public Health, Emory University, Atlanta, Georgia, USA.; Department of Molecular Pharmacology and Therapeutics, Vagelos College of Physicians and Surgeons, Columbia University, New York, New York, USA.
Jazyk: angličtina
Zdroj: The European journal of neuroscience [Eur J Neurosci] 2024 May; Vol. 59 (10), pp. 2483-2501. Date of Electronic Publication: 2024 Mar 26.
DOI: 10.1111/ejn.16311
Abstrakt: Dopaminergic neurons of the substantia nigra exist in a persistent state of vulnerability resulting from high baseline oxidative stress, high-energy demand, and broad unmyelinated axonal arborisations. Impairments in the storage of dopamine compound this stress because of cytosolic reactions that transform the vital neurotransmitter into an endogenous neurotoxicant, and this toxicity is thought to contribute to the dopamine neuron degeneration that occurs Parkinson's disease. We have previously identified synaptic vesicle glycoprotein 2C (SV2C) as a modifier of vesicular dopamine function, demonstrating that genetic ablation of SV2C in mice results in decreased dopamine content and evoked dopamine release in the striatum. Here, we adapted a previously published in vitro assay utilising false fluorescent neurotransmitter 206 (FFN206) to visualise how SV2C regulates vesicular dopamine dynamics and determined that SV2C promotes the uptake and retention of FFN206 within vesicles. In addition, we present data indicating that SV2C enhances the retention of dopamine in the vesicular compartment with radiolabelled dopamine in vesicles isolated from immortalised cells and from mouse brain. Further, we demonstrate that SV2C enhances the ability of vesicles to store the neurotoxicant 1-methyl-4-phenylpyridinium (MPP + ) and that genetic ablation of SV2C results in enhanced 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced vulnerability in mice. Together, these findings suggest that SV2C functions to enhance vesicular storage of dopamine and neurotoxicants and helps maintain the integrity of dopaminergic neurons.
(© 2024 Federation of European Neuroscience Societies and John Wiley & Sons Ltd.)
Databáze: MEDLINE
Externí odkaz: