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MiR-449c inhibits gastric carcinoma growth

Zhiming Wu1, Huangen Wang1, Sunyang Fang1

  • 1Department of Surgery, Shaoxing Hospital of China Medical University, 1 Huayu Road, Shaoxing 312030, China.

Life Sciences
|July 5, 2015
PubMed
Abstract

Insights

Reduced miR-449c levels in gastric cancer (GC) tissues correlate with poor survival. This microRNA suppresses GC cell growth and promotes apoptosis, potentially by targeting the MET oncogene.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Gastric carcinoma (GC) is a major cause of cancer mortality in China.
  • MicroRNA (miRNA) dysregulation is implicated in GC development.
  • The tumor-suppressive role of miR-449c in lung cancer is established, but its function in GC is unknown.

Purpose of the Study:

  • To investigate the role of miR-449c in gastric carcinoma.
  • To determine the relationship between miR-449c levels and patient survival.
  • To elucidate the molecular mechanism of miR-449c in GC progression.

Main Methods:

  • Quantitative reverse transcription polymerase chain reaction (RT-qPCR) to measure miR-449c levels in GC tissues and cell lines.
  • Transfection with miRNA mimics and antisense oligonucleotides (ASO) to overexpress and inhibit miR-449c.
  • Cell proliferation assays (MTT) and apoptosis analysis (FACS).
  • Bioinformatic prediction and dual-luciferase reporter assays to identify miR-449c targets.

Main Results:

  • Lower miR-449c expression was observed in GC tissues, correlating with reduced patient survival rates.
  • Overexpression of miR-449c inhibited GC cell growth and induced apoptosis.
  • Inhibition of miR-449c promoted GC cell growth and suppressed apoptosis.
  • The MET oncogene was identified as a direct target of miR-449c, with binding occurring at the 3' untranslated region (UTR).

Conclusions:

  • Reduced miR-449c levels contribute to GC progression and are associated with poor patient outcomes.
  • miR-449c functions as a tumor suppressor in GC, potentially through targeting MET.
  • These findings highlight miR-449c as a potential therapeutic target for gastric cancer.
Keywords:
ApoptosisGastric carcinoma (GC)GrowthMETMicroRNAs (miRNA)miR-449c

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