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Posttranscriptional deregulation of Src due to aberrant miR34a and miR203 contributes to gastric cancer development

Qiang Hao1, Xiaozhao Lu, Nannan Liu

  • 1The State Key Laboratory of Cancer Biology, School of Pharmacy, Department of Biopharmaceutics, The Fourth Military Medical University, Xi'an 710032, China.

BMB Reports
|June 25, 2013
PubMed

Insights

Gastric cancer involves increased c-SRC (SRC) protein. Tumor suppressive microRNAs miR34a and miR203 target SRC, inhibiting cancer cell growth and migration, offering a potential new therapy.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Gastric cancer is a leading cause of cancer mortality worldwide.
  • Upregulated nonreceptor tyrosine kinase c-SRC (SRC) is implicated in gastric cancer development.
  • SRC protein levels are elevated in clinical gastric cancer samples, more so than RNA levels.

Purpose of the Study:

  • To investigate the role of posttranscriptional regulation in SRC expression in gastric cancer.
  • To explore the relationship between tumor suppressive microRNAs (miRNAs) and SRC expression.
  • To evaluate the therapeutic potential of targeting SRC via miRNAs in gastric cancer.

Main Methods:

  • Analysis of SRC expression in clinical gastric cancer samples.
  • Correlation studies between SRC expression and tumor suppressive miRNAs (miR34a, miR203).
  • Restoration of miR34a and miR203 in gastric cancer cell lines to assess effects on SRC expression, cell growth, and migration.

Main Results:

  • SRC expression, particularly at the protein level, is significantly increased in gastric cancer.
  • Expression of tumor suppressive miRNAs miR34a and miR203 inversely correlates with SRC expression.
  • Restoring miR34a and miR203 reduced SRC levels, inhibiting gastric cancer cell growth and migration.

Conclusions:

  • Posttranscriptional regulation of SRC by miR34a and miR203 plays a crucial role in gastric cancer progression.
  • Targeting SRC using miR34a or miR203 mimics presents a promising therapeutic strategy for gastric cancer.

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