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Published on: May 4, 2021
MicroRNA 33 regulates glucose metabolism
Cristina M Ramírez1, Leigh Goedeke, Noemi Rotllan
1Department of Medicine, Leon H. Charney Division of Cardiology and Marc and Ruti Bell Vascular Biology and Disease Program, New York University School of Medicine, New York, New York, USA.
Molecular and Cellular Biology
|May 30, 2013
Summary
MicroRNA-33b (miR-33b) regulates glucose metabolism by targeting key gluconeogenesis enzymes. This finding reveals miR-33b
Area of Science:
- Molecular Biology
- Metabolic Regulation
- Gene Expression
Background:
- Metabolic diseases arise from dysregulated biological pathways.
- Small noncoding RNAs, like microRNAs (miRNAs), are crucial posttranscriptional regulators.
- miR-33a and miR-33b, intronic to sterol regulatory element-binding protein (SREBP) genes, influence lipid metabolism.
Purpose of the Study:
- To investigate the role of miR-33b in glucose metabolism regulation.
- To determine if miR-33b targets key enzymes in hepatic gluconeogenesis.
Main Methods:
- Overexpression of miR-33b in human hepatic cells.
- Analysis of PCK1 and G6PC gene expression.
- Correlation studies in rhesus monkeys following glucose infusion.
Main Results:
- miR-33b overexpression inhibited phosphoenolpyruvate carboxykinase (PCK1) and glucose-6-phosphatase (G6PC) expression.
- Reduced expression of PCK1 and G6PC led to decreased glucose production.
- In vivo, hepatic SREBP1c/miR-33b levels inversely correlated with PCK1 and G6PC expression.
Conclusions:
- miR-33b cooperates with SREBP1 to regulate glucose homeostasis.
- This regulation involves targeting key gluconeogenesis enzymes.
- miR-33a/b present potential therapeutic targets for metabolic diseases.
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