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Scholarly Communication

p16 promoter methylation is a potential predictor of malignant transformation in oral epithelial dysplasia

Hall, Gillian; Shaw, R.J.; Field, Anne; Rogers, S.N.; Sutton, David N.; Woolgar, Julia Anne; Lowe, D.; Liloglou, Triantafillos; Field, J.K. and Risk, Janet M. (2008) p16 promoter methylation is a potential predictor of malignant transformation in oral epithelial dysplasia. Cancer Epidemiology Biomarkers & Prevention (CEBP), 17 (8). pp. 2174-2179. ISSN 1055-9965

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Management of the patient with oral epithelial dysplasia depends on the ability to predict malignant transformation. Histological grading of this condition fails in this regard and is also subject to inter and intra-pathologist variability. This study uses longitudinal clinical samples to explore the prognostic value of a previously validated panel of methylation biomarkers in a cohort of patients with histologically proven oral dysplasia. Methylation enrichment pyrosequencing assays were employed to provide the sensitivity of traditional methylation specific PCR (MSP) with the additional specificity advantages of a subsequent confirmatory sequencing reaction. In 57% (8/14) patients with a lesion that transformed to oral squamous cell carcinoma (OSCC), 26% (26/100) of longitudinal samples collected over ≥ 3 years demonstrated p16 methylation. Only 1% (2/184) of samples from 8% of patients (2/24) not undergoing malignant transformation within 3 years had p16 methylation. Both of these samples with p16 promoter methylation were the most recently collected and the patients remain under continuing clinical review. Promoter methylation of MGMT, CYGB and CCNA1 did not correlate with malignant progression. We thus conclude that methylation of the p16 gene promoter shows promise as a predictor for malignant transformation (Fishers exact P=0.002) in a subset of patients.

Item Type:Article
Uncontrolled Keywords:promoter methylation, head and neck squamous cell carcinoma, oral dysplasia, p16
Subjects:R Medicine > RK Dentistry
Departments, Research Centres and Related Units:Academic Faculties, Institutes and Research Centres > Faculty of Medicine > School of Dental Sciences
Publisher's Statement:© 2008 American Association for Cancer Research
ID Code:739
Deposited On:10 Jun 2008 09:25
Last Modified:20 Mar 2012 12:19

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