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miR-720 Regulates Insulin Secretion by Targeting Rab35.
Chunting Lu1, Dan Wang1, Yunlu Feng2
1Science and Education Office, The First Affiliated Hospital, Jinan University, Guangzhou 510630, China.
Biomed Research International
|April 21, 2021
Summary
MicroRNA-720 (miR-720) is elevated in type 2 diabetes (T2D) and inhibits insulin secretion by targeting Rab35, suggesting its potential as a diagnostic biomarker.
Area of Science:
- Molecular Biology
- Endocrinology
- Biochemistry
Background:
- MicroRNAs (miRNAs) show promise in type 2 diabetes (T2D) diagnosis and treatment.
- Understanding the role of specific miRNAs in glucose metabolism and insulin secretion is crucial for T2D research.
Purpose of the Study:
- To investigate if miR-720 targets Rab35 to regulate insulin secretion in MIN6 cells.
- To elucidate the molecular mechanism of miR-720 in T2D.
- To evaluate the clinical value of miR-720 as a T2D biomarker.
Main Methods:
- Collected samples from 55 new T2D patients and controls.
- Measured miR-720, fasting blood glucose, and insulin levels.
- Manipulated miR-720 and Rab35 expression in MIN6 cells; performed dual luciferase reporter assays, RT-PCR, and Western blotting.
Main Results:
- Circulating miR-720 levels were significantly higher in T2D patients and correlated positively with fasting blood glucose.
- Overexpression of miR-720 inhibited insulin secretion, while its downregulation promoted it.
- miR-720 targets Rab35, affecting the PI3K/Akt/mTOR signaling pathway and subsequently insulin secretion.
Conclusions:
- miR-720 plays a role in regulating insulin secretion by targeting Rab35 and activating the PI3K/Akt/mTOR pathway.
- miR-720 may serve as a potential diagnostic biomarker for T2D.
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