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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

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Role of PTCH1 gene methylation in gastric carcinogenesis

Yun Zuo1, Yu Song1, Min Zhang1

  • 1Department of Oncology, The First Hospital of Zhangjiagang, Zhangjiagang, Jiangsu 215600, P.R. China.

Oncology Letters
|July 12, 2014
PubMed

Insights

Gastric cancer involves PTCH1 gene promoter hypermethylation, reducing PTCH1 expression. The demethylation agent 5-aza-2'-deoxycytidine (5-aza-dC) can reverse this methylation, increasing PTCH1 expression and potentially treating gastric cancer.

Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • PTCH1 (Patched 1) is a tumor suppressor gene.
  • Aberrant methylation of PTCH1 promoter is implicated in various cancers.
  • Gastric cancer pathogenesis involves epigenetic alterations.

Purpose of the Study:

  • To investigate the role of PTCH1 promoter methylation in gastric carcinogenesis.
  • To evaluate the therapeutic potential of 5-aza-2 -deoxycytidine (5-aza-dC) in gastric cancer treatment by targeting PTCH1 methylation.

Main Methods:

  • Quantitative PCR for PTCH1 mRNA expression.
  • Methylation-specific PCR for PTCH1 promoter methylation analysis.
  • Flow cytometry to assess apoptosis and cell cycle.
  • Treatment of gastric cancer AGS cell line with 5-aza-dC.

Main Results:

  • PTCH1 expression was negatively correlated with promoter methylation in gastric tissues and AGS cells (r=-0.591, P=0.006).
  • 5-aza-dC treatment induced apoptosis and G0/G1 phase arrest in AGS cells.
  • 5-aza-dC treatment led to PTCH1 demethylation and increased PTCH1 expression.

Conclusions:

  • PTCH1 gene promoter hypermethylation is a key factor in reduced PTCH1 expression in gastric cancer.
  • 5-aza-dC effectively reverses PTCH1 methylation and regulates its expression.
  • Targeting PTCH1 methylation with agents like 5-aza-dC shows promise for gastric cancer therapy.
Keywords:
5-aza-2′-deoxycytidinePTCH1 genegastric cancershedgehog signal pathwaymethylation

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