Abstract
To determine the correlation between methylation of p16 gene in promoter region and the carcinogenesis and progression of squamous cell carcinoma (SCC) of buccal mucosa. Methylation of pl6 gene in SCC and leukoplakia of buccal mucosa was investigated by MSP and pl6 protein was analyzed by Western blot. The methylation of p16 gene was found in 15 of 30 cases SCC and 1 of 10 cases of leukoplakia of buccal mucosa (P < 0.05). Methylation of p16 gene in SCC of buccal mucosa was not related with age, sex, cell differentiation and clinical stage. But methylation of p16 in the cases with lymph node-metastasis was higher than that in the cases without lymph node-metastasis protein (P < 0.05). Meanwhile Methylation of p16 gene was positively correlated with no-expression of p16 protein (P < 0.01). The methylation of p16 gene leaded to the inactivation of p16 gene and was related with the carcinogenesis and progress of SCC of buccal mucosa.
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