MicroRNA-183 accelerates the proliferation of hepatocyte during liver regeneration through targeting programmed cell
Fangxing Hou1, Xing Li2, Yanfeng Wang3
1Queen Mary School, Nanchang University, Nanchang, Jiangxi, China.
Background:
Liver regeneration is a highly orchestrated process concerning the modulation of various microRNAs (miRs). miR-183 was recently found to be involved in the process of liver regeneration, that miR-183 was remarkably up-regulated at 2-6 h after partial hepatectomy.
Objective:
This study was aimed to explore the mechanism of miR-183 in on liver regeneration.
Methods:
After partial hepatectomy (PH) or transfection, we measured the changes of miR-183 and programmed cell death protein 6 (PDCD6) levels in rats and the hepatocytes. The histopathology was observed with hematoxylin-eosin staining. The miR-183 mimic and inhibitor plasmids were intravenously injected into rats, and the liver weight/body weight ratio was calculated. The prediction of TargetScan and the validation of luciferase activity assay were employed to confirm the targeting relationship between miR-183 and PDCD6. The viability, apoptosis and cell cycle of transfected rat hepatocyte BRL-3A were determined via MTT and flow cytometry assays.
Results:
MiR-183 expression showed a contrary tendency with that of PDCD6 during liver regeneration. Enhanced miR-183 in rats could notably increase liver/body weight ratio, while its inhibition did conversely. Overexpressed PDCD6, a target of miR-183, repressed the viability and cell cycle in hepatocytes, whereas its silence led to contrary results. Overexpressed miR-183 in BRL-3A cells enhanced cell viability and promoted the cell cycle yet suppressed apoptosis, whereas its inhibition showed contrary results, which were offset by PDCD6.
Conclusions:
Collectively, miR-183 promoted liver regeneration via targeting PDCD6.
Insights
MicroRNA-183 (miR-183) promotes liver regeneration by targeting programmed cell death protein 6 (PDCD6). Upregulating miR-183 enhances liver regeneration, while inhibiting it has the opposite effect.
Area of Science:
- Hepatology and molecular biology
- Cellular mechanisms of regeneration
Background:
- Liver regeneration is a complex process influenced by microRNAs (miRs).
- miR-183 is upregulated during liver regeneration following partial hepatectomy.
Purpose of the Study:
- To investigate the mechanism by which miR-183 influences liver regeneration.
- To explore the relationship between miR-183 and programmed cell death protein 6 (PDCD6) in liver regeneration.
Main Methods:
- Partial hepatectomy (PH) and cell transfection in rats and hepatocytes.
- Measurement of miR-183 and PDCD6 levels, histopathology, and liver/body weight ratio.
- Luciferase activity assays to confirm miR-183 targeting of PDCD6.
- MTT and flow cytometry assays to assess cell viability, apoptosis, and cell cycle.
Main Results:
- miR-183 expression inversely correlated with PDCD6 levels during liver regeneration.
- Enhanced miR-183 increased liver/body weight ratio; inhibition decreased it.
- miR-183 targeted PDCD6, affecting hepatocyte viability, apoptosis, and cell cycle progression.
Conclusions:
- miR-183 promotes liver regeneration.
- The mechanism involves targeting programmed cell death protein 6 (PDCD6).
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