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The Role of α-Synuclein in Methamphetamine-Induced Neurotoxicity

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Abstract

Methamphetamine (METH), a highly addictive psychostimulant, is the second most widely used illicit drug. METH produces damage dopamine neurons and apoptosis via multiple inter-regulating mechanisms, including dopamine overload, hyperthermia, oxidative stress, mitochondria dysfunction, endoplasmic reticulum stress, protein degradation system dysfunction, and neuroinflammation. Increasing evidence suggests that chronic METH abuse is associated with neurodegenerative changes in the human brain and an increased risk of Parkinson’s disease (PD). METH use and PD may share some common steps in causing neurotoxicity. Accumulation of α-synuclein, a presynaptic protein, is the pathological hallmark of PD. Intriguingly, α-synuclein upregulation and aggregation are also found in dopaminergic neurons in the substantia nigra in chronic METH users. This suggests α-synuclein may play a role in METH-induced neurotoxicity. The mechanism of α-synuclein cytotoxicity in PD has attracted considerable attention; however, how α-synuclein affects METH-induced neurotoxicity has not been reviewed. In this review, we summarize the relationship between METH use and PD, interdependent mechanisms that are involved in METH-induced neurotoxicity and the significance of α-synuclein upregulation in response to METH use. The identification of α-synuclein overexpression and aggregation as a contributor to METH-induced neurotoxicity may provide a novel therapeutic target for the treatment of the deleterious effect of this drug and drug addiction.

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Abbreviations

METH:

Methamphetamine

PD:

Parkinson’s disease

ATS:

Amphetamine-type stimulants

DAT:

Dopamine transporter

DA:

Dopamine

VTA:

Ventral tegmental area

TH:

Tyrosine hydroxylase

VMAT2:

Vesicular monoamine transporter 2

ER:

Endoplasmic reticulum

UPS:

Ubiquitin–proteasome system

DAQ:

DA-quinone

ROS:

Reactive oxygen species

NO:

Nitrogen monoxide

PKCδ:

Protein kinase C-delta

NAC:

Non-Aβ component

JNK:

C-Jun N-terminal kinase

NOS:

Nitric oxide synthase

UCH-L1:

Ubiquitin carboxy-terminal hydrolase L1

DDAH1:

Dimethylarginine dimethylaminohydrolase 1

ADMA:

Asymmetric demethylated l-arginine

SUMO-1:

Small ubiquitin modifier 1

MeCP2:

Methyl-CpG binding protein 2

DNMT1:

DNA methyltransferase 1

SNP:

Single nucleotide polymorphisms

DOPAC:

3,4-Dihydroxyphenylacetic acid

HVA:

Homovanillic acid

PDI:

Protein disulfide isomerase

C/EBPβ:

CCAAT-enhancer binding protein β

Trib3:

Tribbles pseudokinase 3

CMA:

Chaperone-mediated autophagy

Hsc70:

Heat shock cognate protein 70 kDa

LAMP-2a:

Lysosome-associated membrane protein type 2a

RNS:

Reactive nitrogen species

AADC:

Aromatic amino acid decarboxylase

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Funding

This work was supported by National Nature Science Foundation (81771436), Shanghai Key Laboratory of Psychotic Disorders (13DZ2260500), Shanghai Municipal Science, and Technology Major Project (2018SHZDZX05), Shanghai Clinical Research Center for Mental Health (19MC1911100), Shanghai Shenkang Hospital Development Center (SHDC2020CR3045B), Shanghai Intelligent Engineering Technology Research Center for Addiction and rehabilitation (19DZ2255200).

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All authors listed have made a substantial, direct, and intellectual contribution to the work and approved it for publication.

Corresponding author

Correspondence to Min Zhao.

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The authors declare that they have no competing interests.

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Wu, M., Su, H. & Zhao, M. The Role of α-Synuclein in Methamphetamine-Induced Neurotoxicity. Neurotox Res 39, 1007–1021 (2021). https://doi.org/10.1007/s12640-021-00332-2

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  • DOI: https://doi.org/10.1007/s12640-021-00332-2

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