Objectives: To analyze the distribution of HLA alleles and HLA microsatellite alleles in Croatian patients with testicular carcinoma, compare it with that of healthy controls and investigate whether the polymorphism within the HLA region could be associated with the development of testicular cancer.
Methods: Genomic DNA was isolated from the peripheral blood of 24 patients with testicular germ cell tumors (TGCT). Patients and controls were typed for HLA class I and class II polymorphism by the PCR-SSO method. Nine HLA microsatellites were analyzed by PCR and electrophoresis in an automated sequencer.
Results: No significant deviation in the distribution of frequencies at HLA class I alleles was observed between patients and controls. Among HLA class II alleles, a statistically significant increase in the frequency of the HLA-DPB1*1701 allele was found among patients. The frequency of the HLA-DRB1*07-DQA1*0201-DQB1*0202 haplotype was increased in patients in comparison to the controls. Analysis of HLA microsatellites showed an increased frequency of D6S291-3 allele (p(corr) = 0.0455, OR = 3.05) among patients.
Conclusions: The observed association of the disease and the DPB1*1701 allele as well as with the D6S291-3 allele suggests that this part of the HLA region might be involved in the pathogenesis of TGCT. Our data provide a basis for further studies about the correlation between the HLA region and testicular cancer.
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