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Association between RASSF1A promoter methylation and ovarian cancer: a meta-analysis

Hao Shi1, Ya Li, Xiaozhong Wang

  • 1Department of Epidemiology and Biostatistics, and the Ministry of Education Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China.

Plos One
|October 12, 2013
PubMed
Abstract

Insights

RAS association domain family protein 1a gene (RASSF1A) promoter methylation is strongly linked to ovarian cancer. This meta-analysis confirms RASSF1A methylation is significantly more frequent in ovarian cancer patients than in controls.

Area of Science:

  • Oncology
  • Epigenetics
  • Molecular Biology

Background:

  • RAS association domain family protein 1a gene (RASSF1A) is a tumor suppressor gene crucial for preventing cancer.
  • Aberrant methylation of tumor suppressor genes is a key epigenetic mechanism in ovarian cancer development.
  • Previous studies on RASSF1A promoter methylation and ovarian cancer yielded inconsistent results due to small sample sizes.

Purpose of the Study:

  • To conduct a meta-analysis to clarify the association between RASSF1A promoter methylation and ovarian cancer.
  • To provide a more robust statistical evaluation of RASSF1A methylation as a biomarker for ovarian cancer.

Main Methods:

  • Systematic literature search of PubMed, EMBASE, Web of Science, and CNKI databases.
  • Inclusion of 13 studies comprising 763 ovarian cancer patients and 438 controls.
  • Meta-analysis using a fixed-effects model to pool odds ratios and assess heterogeneity and publication bias.

Main Results:

  • RASSF1A promoter methylation was detected in 30%-58% of ovarian cancer cases (median 48%) versus 0%-21% in controls (median 0%).
  • The pooled odds ratio for RASSF1A promoter methylation in ovarian cancer was 11.17 (95% CI: 7.51-16.61), indicating a significant association.
  • Results demonstrate a substantially higher frequency of RASSF1A promoter methylation in ovarian cancer patients compared to healthy controls.

Conclusions:

  • RASSF1A promoter methylation is strongly associated with the presence of ovarian cancer.
  • This finding supports the role of RASSF1A epigenetic silencing in ovarian tumorigenesis.
  • RASSF1A promoter methylation may serve as a potential diagnostic or prognostic biomarker for ovarian cancer.

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