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  • Title: [Genetic polymorphisms of interferon-gamma and interleukin-8 in patients with nasopharyngeal carcinoma].
    Author: Tai SH, Wei YS, Wang P, Zhou B, Ran P, Yang ZH, Zhang L.
    Journal: Sichuan Da Xue Xue Bao Yi Xue Ban; 2007 Sep; 38(5):862-5. PubMed ID: 17953379.
    Abstract:
    OBJECTIVE: To investigate the distribution of genotype and allele frequencies of the genetic polymorphisms of IFN-gamma and IL-8 in patients with nasopharyngeal carcinoma (NPC) and analyze the relationship between the genetic polymorphisms of IFN-gamma and IL-8 and NPC. METHODS: A total of 105 NPC patients and 109 healthy people were recruited in this study. The polymorphism of IL-8-251 locus was determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). The IFN-gamma CA-repeat polymorphism was determined by polymerase chain reaction and polyacrylamide gel electrophoresis with silver staining. The relationship between the polymorphisms of the two loci and NPC was analyzed. RESULTS: There was no statistically significant difference in IL-8-251(A/T) genotype and allele frequencies between the NPC patients and the healthy people (P < 0.05). The frequency of IFN-gamma 13 times CA repeats in the NPC patients was significantly lower than that of the healthy people (chi2 = 5.878, P = 0.015). A significant difference in the distribution of the genotype of (CA)13+ / (CA)13+, (CA)13+ / (CA)13- and (CA)13- / (CA)13- between the NPC patients and the healthy people was also found (chi2 = 15.181, P = 0.001). CONCLUSION: The IFN-gamma 13 times CA-repeat polymorphism is associated with the onset of NPC. But no association between the polymorphism of IL-8-251 (A/T) locus and NPC is evident. The IFN-gamma CA-repeat polymorphism might play an important role in determining the susceptibility to nasopharyngeal carcinoma.
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