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Frequent methylation of DAB2, a Wnt pathway antagonist, in oral and oropharyngeal squamous cell carcinomas

Jaroslaw Paluszczak1, Katarzyna Kiwerska2, Daniela Mielcarek-Kuchta3

  • 1Department of Pharmaceutical Biochemistry, Poznan University of Medical Sciences, Poznan, Poland.

Pathology, Research and Practice
|December 20, 2017
PubMed
Abstract

Insights

DAB2 gene promoter methylation is frequent in oral cancer, occurring in 70% of cases. This epigenetic silencing may offer potential for early tumor detection, though not linked to staging or survival.

Area of Science:

  • Oncology
  • Molecular Biology
  • Epigenetics

Background:

  • Aberrant Wnt signaling is implicated in head and neck carcinomas.
  • Epigenetic alterations frequently drive Wnt pathway activation.
  • DAB2 negatively regulates Wnt signaling.

Purpose of the Study:

  • Assess the frequency of DAB2 promoter methylation in oral cancer.
  • Correlate DAB2 methylation with clinicopathological features.
  • Investigate DAB2 as a potential biomarker for oral carcinoma.

Main Methods:

  • Study included 49 patients with primary oral squamous cell carcinoma.
  • DNA extracted from surgical specimens via phenol-chloroform method.
  • Methylation-specific PCR used for gene promoter methylation analysis.

Main Results:

  • DAB2 promoter methylation detected in 70% of primary oral carcinomas.
  • No significant correlation found between DAB2 methylation and TNM staging.
  • DAB2 methylation status did not correlate with overall patient survival.

Conclusions:

  • DAB2 is frequently epigenetically silenced in oral carcinomas.
  • Epigenetic silencing of DAB2 is a common event in oral carcinogenesis.
  • DAB2 may serve as a potential biomarker for oral tumor detection.
Keywords:
DAB2DNA methylationHead and neck cancerOral cancerWnt pathway

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