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Decreased expression of p16 gene in gastric cancer

S Fushida1, Y Yonemura, H Takamura

  • 1TUFTS UNIV,SCH MED,DEPT BIOCHEM,BOSTON,MA 02111.

International Journal of Oncology
|May 6, 2011
PubMed

Insights

The p16 gene shows altered expression in gastric cancer. Decreased or lost p16 gene products may contribute to gastric cancer development, suggesting its role in tumorigenesis.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The p16 gene is a tumor suppressor involved in cell cycle regulation.
  • Alterations in p16 gene function are implicated in various cancers.

Purpose of the Study:

  • To investigate the frequency and nature of p16 gene alterations in gastric cancer.
  • To determine the correlation between p16 gene status and gastric cancer development.

Main Methods:

  • Analysis of p16 gene homozygous deletion and mutations in gastric cancer cell lines and primary tumors.
  • Reverse transcription-polymerase chain reaction (RT-PCR) to assess p16 gene expression levels.

Main Results:

  • Homozygous deletion of p16 was observed in 1 of 8 cell lines, but not in primary tumors.
  • No mutations in p16 exons 1-3 were detected.
  • Decreased or absent p16 gene expression was found in 12.5% of cell lines and 40% of primary tumors.

Conclusions:

  • The p16 gene's expression is frequently reduced or lost in gastric cancers.
  • These alterations in p16 gene product suggest a correlation with gastric cancer tumorigenesis.

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