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ZFIN ID: ZDB-PUB-170921-9
Up-regulation of autophagy-related gene 5 (ATG5) protects dopaminergic neurons in a zebrafish model of Parkinson's disease.
Hu, Z.Y., Chen, B., Zhang, J.P., Ma, Y.Y.
Date: 2017
Source: The Journal of biological chemistry 292(44): 18062-18074 (Journal)
Registered Authors: Zhang, Jing-pu
Keywords: PTEN-induced putative kinase 1 (PINK1), Parkinson disease, alpha-synuclein (a-synuclein), atg5, autophagy, neurodegenerative disease, parkin, zebrafish
MeSH Terms:
  • 1-Methyl-4-phenyl-1,2,3,6-tetrahydropyridine
  • Animals
  • Autophagy/drug effects
  • Autophagy-Related Protein 5/antagonists & inhibitors
  • Autophagy-Related Protein 5/genetics
  • Autophagy-Related Protein 5/metabolism*
  • Autophagy-Related Protein 5/therapeutic use
  • Behavior, Animal/drug effects
  • Biomarkers/metabolism
  • Brain/cytology
  • Brain/metabolism
  • Brain/pathology
  • Cell Line, Tumor
  • DNA, Recombinant/therapeutic use
  • Disease Models, Animal*
  • Dopaminergic Neurons/cytology
  • Dopaminergic Neurons/metabolism*
  • Dopaminergic Neurons/pathology
  • Embryo, Nonmammalian
  • Gene Expression Regulation*/drug effects
  • Gene Knockdown Techniques
  • Genetic Therapy*
  • Humans
  • Larva
  • Microinjections
  • Nerve Tissue Proteins/antagonists & inhibitors
  • Nerve Tissue Proteins/genetics
  • Nerve Tissue Proteins/metabolism
  • Nerve Tissue Proteins/therapeutic use
  • Neuroprotection/drug effects
  • Parkinsonian Disorders/metabolism
  • Parkinsonian Disorders/pathology
  • Parkinsonian Disorders/prevention & control*
  • Zebrafish
  • Zebrafish Proteins/antagonists & inhibitors
  • Zebrafish Proteins/genetics
  • Zebrafish Proteins/metabolism*
PubMed: 28928221 Full text @ J. Biol. Chem.
FIGURES
ABSTRACT
Parkinson's disease (PD) is one of the most epidemic neurodegenerative diseases and is characterized by movement disorders arising from loss of midbrain dopaminergic (DA) neurons. Recently, the relationship between PD and autophagy has received considerable attention, but information about the mechanisms involved is lacking. Here, we report that autophagy-related gene 5 (ATG5) is potentially important in protecting dopaminergic neurons in a 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD model in zebrafish. Using analyses of zebrafish swimming behavior, in situ hybridization, immunofluorescence, and expressions of genes and proteins related to PD and autophagy, we found that the ATG5 expression level was decreased and autophagy flux was blocked in this model. The ATG5 down-regulation led to the upgrade of PD-associated proteins, such as β-synuclein, Parkin, and PINK1, aggravation of MPTP-induced PD-mimicking pathological locomotor behavior, DA neuron loss labeled by tyrosine hydroxylase (TH) or dopamine transporter (DAT), and blocked autophagy flux in the zebrafish model. ATG5 overexpression alleviated or reversed these PD pathological features, rescued DA neuron cells as indicated by elevated TH/DAT levels, and restored autophagy flux. The role of ATG5 in protecting DA neurons was confirmed by expression of the human atg5 gene in the zebrafish model. Our findings reveal that ATG5 has a role in neuroprotection, and up-regulation of ATG5 may serve as a goal in the development of drugs for PD prevention and management.
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