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  4. Interactions of VMAT2 with CDCrel-1 and Parkin in Methamphetamine Neurotoxicity
 
research article

Interactions of VMAT2 with CDCrel-1 and Parkin in Methamphetamine Neurotoxicity

Chauhan, Heli
•
Carruthers, Nicholas J.
•
Stemmer, Paul M.
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December 1, 2024
International Journal of Molecular Sciences

In recent years, methamphetamine (METH) misuse in the US has been rapidly increasing, and there is no FDA-approved pharmacotherapy for METH use disorder (MUD). In addition to being dependent on the drug, people with MUD develop a variety of neurological problems related to the toxicity of this drug. A variety of molecular mechanisms underlying METH neurotoxicity has been identified, including the dysfunction of the neuroprotective protein parkin. However, it is not known whether parkin loss of function within striatal dopaminergic (DAergic) terminals translates into decreased DA storage capacity. This study examined the relationship between parkin, its substrate cell division cycle related-1 (CDCrel-1) associated with synaptic vesicles, and vesicular monoamine transporter-2 (VMAT2) responsible for packaging DA in an in vivo model of METH neurotoxicity. To assess the individual differences in response to METH’s neurotoxic effects, a large group of male Sprague Dawley rats were treated with binge METH or saline and sacrificed 1 h or 24 h later. This study is the first to show that CDCrel-1 interacts with VMAT2 in the rat striatum and that binge METH can alter this interaction as well as the levels and subcellular localization of CDCrel-1. The proteomic analysis of VMAT-2-associated proteins revealed the upregulation of several proteins involved in the exocytosis/endocytosis cycle and responses to stress. The results suggest that DAergic neurons are engaged in counteracting METH-induced toxic effects, including attempts to increase endocytosis and autophagy at 1 h after the METH binge, with the responses varying widely between individual rats. Studying CDCrel-1, VMAT2, and other proteins in large groups of outbred rats can help define individual genetic and molecular differences in responses to METH neurotoxicity, which, in turn, may aid treating humans suffering from MUD and its neurological consequences.

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Type
research article
DOI
10.3390/ijms252313070
Scopus ID

2-s2.0-85211942719

PubMed ID

39684782

Author(s)
Chauhan, Heli

Wayne State University

Carruthers, Nicholas J.

Institute of Environmental Health Sciences and Proteomics Core Facility

Stemmer, Paul M.

Wayne State University

Schneider, Bernard L.  

École Polytechnique Fédérale de Lausanne

Moszczynska, Anna

Wayne State University

Date Issued

2024-12-01

Published in
International Journal of Molecular Sciences
Volume

25

Issue

23

Article Number

13070

Subjects

CDCrel-1

•

exocytosis/endocytosis cycle

•

methamphetamine neurotoxicity

•

parkin

•

vesicular monoamine transporter-2

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
PTBTG  
FunderFunding(s)Grant NumberGrant URL

NIH

DA023085,P30CA022453,P30ES036084,S10OD030484

Available on Infoscience
January 25, 2025
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/244374
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