RESUMEN
It has been suggested that malfunction of immune system may causes testicular cancer. Recently, our understanding of innate immune system has been expanded, by discovery of "Toll-Like Receptors" [TLRs]. Some studies have shown that polymorphisms of TLR2 and 4 may affect on the risk of cancer. Also, the role of TLRs 3 and 9 have been shown in apoptosis and metastasis of cancer cells in animal models. Little information is available about the influence of innate immunity on testicular malignancy. Therefore, expression of TLRs 2, 3, 4 and 9 as main components of innate immunity has been investigated in this study. In this case control study, TLRs gene expression was examined by RT-PCR in normal testis and testicular cancer tissues. Real time quantitative PCR [Q-PCR] analysis was used to compare the relative expression of TLRs between the samples. mRNAs of TLR 2, 3, 4 and 9 were expressed in all normal and cancer samples. Q-PCR reveals that cancer samples had stronger expression of these genes compared with normal ones. It seems that the different TLRs expression in testicular cancer cells may contribute to extensive signaling pathways involved in carcinogenesis