Early Diagnosis of Oral Cancer by Detecting p16 Hydroxymethylation

A Multicentral Prospective Study on Prediction of Malignant Progression of Oral Epithelial Dysplasia With p16 Hydroxymethylation

The purpose of this study is to verify the function of p16 hydroxymethylation diagnostic reagents in early diagnosis of oral cancer.

Background:Oral epithelial dysplasia (OED) is one of the common precancerous lesions among Chinese adults. To investigate the clinical predictive value of p16 hydroxymethylation diagnostic reagents in the early diagnosis of oral cancer, the investigators carried out the prospective multi-center double-blind cohort study.

Methods:265 patients with histologically confirmed mild or moderate OED were included in the present study. After the bisulfite modification and tet assistant bisulfite modification, MethyLight and Methylation-specific PCR (MSP) assays were used to analyze p16 methylation and status in these patients. Building three follow-up queue by p16-methylated, p16-hydroxymethylation and p16-unmethylated. The Statistical analysis used SPSS16.0. All P-values were two-sided. P<0.05 was considered to test for statistical significance difference.

Inclusion Criteria:

• Histopathological diagnosis of oral lesions meet the epithelial diagnostic criteria for mild to moderate grade OED;
• No local area stimulate by residual root and crown, sharp cusp, poor restoration and biting cheek or lips;
• Without the treatment history by laser , radiation or chemical;
• Be able to Sign the informed consent;

Exclusion Criteria:

• Histopathological diagnosis of oral lesions do not meet the epithelium of mild to moderate dysplasia diagnostic criteria; histological diagnosis of severe grade OED or malignant disease;
• Pregnancy or breast-feeding women;
• Serious heart, lung, liver , kidney and other systemic diseases local area stimulate by residual root and crown, sharp cusp, poor restoration and biting cheek or lips;
• OED treatment history by LASER, radiotherapy, or chemotherapy;
• Tumor and psychiatric patients;
• Patients are unable to cooperate;