Nasopharyngeal carcinoma (NPC) is a disease that is closely associated with EBV infection. Toll-like receptor 9 is an\nimportant factor mediating the interaction between EBV and the host immune response. Any genetic (single nucleotide\npolymorphisms, SNPs) or expression variation in TLR9 gene may modify the ability of the receptor to respond correctly\nto viral infection as in NPC. This study is aimed at evaluating the effect of TLR9 functional polymorphisms (TLR9-1486\nT/C and TLR9-1237 T/C) and TLR9 mRNA expression in NPC severity and progression at diagnosis and after treatment.\nThis study included 322 patients with NPC. RFLP-PCR and real-time PCR were used to assess, respectively, the genotypes\nand the mRNA expression of TLR9 gene. ...........................
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