The Effects of Cytotoxic Dose of Testosterone on Bax , Bcl2, and CD82/KAI1 Genes Expression in Colorectal Adenocarcinoma (HT29) and Brain Glioblastoma Cells(A172)

Background and Objectives: Studies have shown that sex steroids affect cancer cells at cellular and molecular level. The objective of this study was to investigate the effects of cytotoxic dose of testosterone on the expression of Bax, Bcl2, and CD82/KAI1 genes in adenocarcinoma colorectal (HT29) and brain glioblastoma cells (A172). Methods: In this laboratory-experimental study, HT29 and A172 cells, were divided into control group and groups exposed to cytotoxic dose of testosterone (1 and 0.1 mg/ml for HT29 and A172, respectively). Real time PCR was used to evaluate the expression levels of Bax, Bcl2, and CD82/KAI1 genes. The data were statistically analyzed between groups using one way ANOVA statistical test. Results: The expression levels of BCL-2 and Bax genes significantly increased and decreased in HT29 cells exposed to cytotoxic dose of testosterone, respectively (p<0.001), but, expression level of CD82/KAI1 gene did not significantly change. The expression levels of Bax and CD82/KAI1 genes significantly increased (p<0.01) and decreased (p