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Table of Contents
Vol. 75, No. 3-4, 2008
Issue release date: October 2008
Section title: Clinical Translational Research
Oncology 2008;75:145–151
(DOI:10.1159/000158665)

Promoter Hypermethylation in Tumour Suppressor Genes Shows Association with Stage, Grade and Invasiveness of Bladder Cancer

Jarmalaite S. · Jankevicius F. · Kurgonaite K. · Suziedelis K. · Mutanen P. · Husgafvel-Pursiainen K.
aFaculty of Natural Sciences and bInstitute of Oncology, Vilnius University, Vilnius, Lithuania; cStatistical Services and dBiological Mechanisms and Prevention of Work-Related Diseases, Finnish Institute of Occupational Health, Helsinki, Finland

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Article / Publication Details

First-Page Preview
Abstract of Clinical Translational Research

Received: 11/30/2007
Accepted: 4/30/2008
Published online: 9/29/2008

Number of Print Pages: 7
Number of Figures: 2
Number of Tables: 1

ISSN: 0030-2414 (Print)
eISSN: 1423-0232 (Online)

For additional information: http://www.karger.com/OCL

Abstract

Aims: Superficial bladder cancer is a highly recurrent disease, with progression to muscle invasiveness occurring in 15–30% of cases. Promoter hypermethylation in a panel of tumour suppressor genes involved in cell cycle control, apoptosis and DNA repair was analyzed in superficial bladder tumours in order to evaluate the suitability of epigenetic biomarkers for an earlier prediction of the aggressive course of the disease. Method: Promoter hypermethylation in p16, RARβ, RASSF1A, DAPK, and MGMT genes was analyzed in 58 cases with superficial bladder cancer and 2 cases with benign urological disease using methylation-specific PCR. Results: Promoter hypermethylation was frequently detected in RARβ, RASSF1A and DAPK genes, and 62% of bladder tumours exhibited hypermethylation in at least one gene. The overall frequency of hypermethylation and the number of genes involved increased with tumour stage, grade and muscle invasiveness. Aberrant methylation of RASSF1A and RARβwas predominant (p < 0.05) in muscle-invasive tumours and high-grade tumours, respectively. Cases with concurrent hypermethylation in DAPK, p16 and RARβ genes were moresusceptible to relapse. Conclusion: The results suggest analysis of promoter hypermethylation as a valuable biomarker for prognosis of the aggressive course of disease in bladder cancer.


Article / Publication Details

First-Page Preview
Abstract of Clinical Translational Research

Received: 11/30/2007
Accepted: 4/30/2008
Published online: 9/29/2008

Number of Print Pages: 7
Number of Figures: 2
Number of Tables: 1

ISSN: 0030-2414 (Print)
eISSN: 1423-0232 (Online)

For additional information: http://www.karger.com/OCL


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