TP53 and head and neck squamous cell carcinoma: Here we analyzed the effects of DAC treatment on the expression of the HPV oncogenes E6 and E7, as well as their target proteins including p53 and p21 in a panel of six HPV-transformed cell lines including HPV 16 and 18 positive cervical cancer cells as well as HPV 16 positive head and neck squamous cell carcinoma (HNSCC) cell lines.