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Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer
07:50

Genome-Wide Analysis of DNA Methylation in Gastrointestinal Cancer

Published on: September 18, 2020

[Relationship between gastric cancer and gene amplification of p14 and mdm2]

Li-Ping Sun1, Nai-Jia Jiang, Wei Fu

  • 1Department of Digestive Diseases, The Second Affiliated Hospital, China Medical University, Shenyang, Liaoning, 110001, P.R.China. sunping1997@163.com

AI Zheng = Aizheng = Chinese Journal of Cancer
|January 15, 2004
PubMed
Abstract

Insights

Mdm2 mRNA expression is significantly increased in gastric tumors, correlating with cancer progression. P14 mRNA expression showed no significant difference in gastric tumors compared to normal tissues, requiring further investigation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Gastroenterology

Background:

  • Tumor development is influenced by specific genes, including p53.
  • Mdm2 and p14 are known modulators of p53 function.
  • Limited research exists on mdm2 and p14 roles in gastric cancer.

Purpose of the Study:

  • To analyze mdm2 and p14 gene expression changes in gastric cancer.
  • To determine the correlation between mdm2, p14, and gastric cancer development.

Main Methods:

  • Studied 55 gastric mucosal biopsies (10 normal, 45 tumors).
  • Assessed mRNA expression of mdm2 and p14 using reverse transcription polymerase chain reaction (RT-PCR).
  • Analyzed the relationship between gene expression and gastric cancer differentiation.

Main Results:

  • Mdm2 mRNA expression was significantly higher in gastric tumors (73.3%) versus normal tissues (40%) (P<0.05).
  • Mdm2 expression varied significantly across differentiation grades (well: 93.3%, moderate: 80.0%, poor: 46.6%).
  • No significant difference in p14 mRNA expression was observed between tumor and normal tissues (60.0% vs. 50.0%, P>0.05).

Conclusions:

  • Mdm2 mRNA expression is closely linked to gastric cancer progression.
  • The role of p14 in gastric tumors requires further research.

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