Mir-34a is upregulated during liver regeneration in rats and is associated with the suppression of hepatocyte proliferation.
basic_science · Level V
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- Record sourced from PubMed, PMID 21655280.
- Also identified by DOI 10.1371/journal.pone.0020238 and PMC identifier PMC2438235.
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Abstract
BACKGROUND: MicroRNAs are a class of small regulatory RNAs that modulate a variety of biological processes, including cellular differentiation, apoptosis, metabolism and proliferation. This study aims to explore the effect of miR-34a in hepatocyte proliferation and its potential role in liver regeneration termination. METHODOLOGY/PRINCIPAL FINDING: MiR-34a was highly induced after partial hepatectomy. Overexpression of miR-34a in BRL-3A cells could significantly inhibit cell proliferation and down-regulate the expression of inhibin βB (INHBB) and Met. In BRL-3A cells, INHBB was identified as a direct target of miR-34a by luciferase reporter assay. More importantly, INHBB siRNA significantly repressed cell proliferation. A decrease of INHBB and Met was detected in regenerating liver. CONCLUSION/SIGNIFICANCE: MiR-34a expression was upregulated during the late phase of liver regeneration. MiR-34a-mediated regulation of INHBB and Met may collectively contribute to the suppression of hepatocyte proliferation.