As with cervical cancer cells, p53 and its downstream transactivation target, p21, were found to be the major targets of E6 in esophageal and tongue cancer cell lines.
Hence, we examined the effect of TP53 polymorphisms (EX4 215G>C, IVS3+40-41ins16 and IVS6+62G>A) on buccal mucosa cancer (BMC) and tongue cancer (TC) risk, survival of patients in relation to risk and clinical factors, gender wise (excepting for estimating hazards ratio [HR]), using Fisher's Exact Test, Kaplan-Meier analysis, and Cox-proportional hazards models.
The increased expression of pS(21)GSK3α and pS(9)GSK3β not only correlated positively with cyclin D1 and p53 expression in tongue cancer progression but a gradual shift of their expression from the cytoplasmic to the nuclear compartment and overall disease severity was also observed.
In addition, two target proteins that are frequently overexpressed during tongue cancer tumorigenesis, alphaB-crystallin and Hsp27, were examined by immunohistochemical analysis.
Tumor samples from 49 patients with tongue cancer were screened for TP53 mutations in exons 5 through 8 by PCR restriction site mutation analysis and for p53 protein expression by immunohistochemistry using the DO-7 antibody.
We analyzed the rate of apoptosis using TDT-mediated dUTP-biotin nick end-labeling (TUNEL), p53 and heparanase in 73 patients with tongue cancer by immonohistochemistry, and tested data for correlation with survival, tumor size, grade and metastasis.
Mutant-type p53 and VEGF are known to be related to angiogenesis, and maspin is a potent angiogenic inhibitor but its role in tongue cancer has scarcely been examined.
The aim of this study was to assess the importance of immunohistochemical thymidylate synthase (TS) expression level as a prognostic marker in tongue cancer patients.
Synergistic down-regulation of telomerase by all-trans retinoic acid and antisense oligonucleotide in oral squamous cell carcinoma cell line (Tca8113).
We have investigated the CDDP sensitivities of two tongue cancer cell lines with differing p53 genetic status, one with wild-type p53 (SAS) and the other with mutant-type p53 (HSC-4).
On the other hand, an A to G substitution at codon 170 in exon 5 of p53 gene resulting in glutamic acid (ACG) to glycine (GCG) was detected in the DNA of her tongue cancer.