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MiR-34a is Involved in the Decrease of ATP Contents Induced by Resistin Through Target on ATP5S in HepG2 Cells
Fengyun Wen1, Bin Li2, Chunyan Huang2
1College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, 471003, Henan, People's Republic of China. newwfyun@163.com.
Biochemical Genetics
|September 20, 2015
Summary
Resistin increases miR-34a levels, which then reduces cellular energy by targeting ATP5S. This study reveals a novel molecular mechanism linking resistin to metabolic dysfunction.
Area of Science:
- Molecular Biology
- Metabolic Syndrome Research
- Gene Regulation
Background:
- Resistin is implicated in metabolic syndrome, necessitating research into its mechanisms for therapeutic development.
- MicroRNAs (miRNAs) are key regulators in biological processes, often acting as negative gene expression regulators.
Purpose of the Study:
- To investigate the role of miR-34a in resistin-mediated reduction of cellular adenosine triphosphate (ATP) content.
- To identify the molecular targets and pathways affected by resistin-induced miR-34a upregulation.
Main Methods:
- MiRNA microarrays were employed to identify resistin-responsive miRNAs.
- Quantitative RT-PCR and Western blot analyses assessed miR-34a and protein expression.
- Bioinformatics and dual-luciferase reporter assays identified and validated miR-34a targets.
Main Results:
- Resistin treatment upregulated miR-34a expression in HepG2 cells.
- Overexpression of miR-34a significantly decreased cellular ATP levels.
- ATP5S was identified as a direct target of miR-34a, with miR-34a binding to the ATP5S mRNA 3'UTR.
Conclusions:
- Resistin diminishes cellular ATP content through the miR-34a/ATP5S regulatory axis.
- This study elucidates a novel molecular mechanism contributing to resistin's role in metabolic dysfunction.
