title: TAP1 gene polymorphisms and nasopharyngeal carcinoma risk in a Tunisian population.
abstract: To find out whether polymorphisms 333-Ile/Val and 637-Asp/Gly of the transporter part of the antigen processing 1 gene (TAP1) are associated with the development of nasopharyngeal carcinoma (NPC), we studied a total of 374 subjects (209 patients and 165 controls). We used the amplification refractory mutation system polymerase chain reaction (ARMS-PCR) method for analyzing the TAP1 gene polymorphisms. We found a significant difference between the patients and the controls in both the TAP1 codon 333 and codon 637 (P = 0.009 and P = 0.002, respectively). We also found that genotypes with the A allele were present in 206 patients with NPC and 155 controls (98.5 vs. 93.9%; P = 0.032; OR = 4.43) and that genotypes with the B allele were more often present in the control group (45 vs. 32%; P = 0.004; OR = 0.48), suggesting a significant positive association of the A allele with NPC risk and a protective role of the B allele. We have observed an association between the distribution of TAP1 alleles and the NPC patient's age at onset, compared with controls. These results back up the fact that the etiology of NPC in intermediate-risk countries is completely different in each peak of age prevalence and that each peak may possess its own particular oncogenic mechanism.
authors.affiliation: Laboratoire d'Immuno-oncologie Moléculaire, Faculté de Médecine de Monastir, 5019 Monastir, Tunisia. elham_tn@yahoo.fr
authors.forename: Elham
authors.initials: E
authors.lastname: Hassen
authors.forename: Karim
authors.initials: K
authors.lastname: Farhat
authors.forename: Sallouha
authors.initials: S
authors.lastname: Gabbouj
authors.forename: Majida
authors.initials: M
authors.lastname: Jalbout
authors.forename: Noureddine
authors.initials: N
authors.lastname: Bouaouina
authors.forename: Lotfi
authors.initials: L
authors.lastname: Chouchane
mesh_terms: D000071181:ATP Binding Cassette Transporter, Subfamily B, Member 2; D018528:ATP-Binding Cassette Transporters / Q000235:genetics*; D000293:Adolescent; D000328:Adult; D000368:Aged; D000483:Alleles; D002648:Child; D005260:Female; D005787:Gene Frequency; D005838:Genotype; D006801:Humans; D015810:Linkage Disequilibrium; D008297:Male; D008875:Middle Aged; D009303:Nasopharyngeal Neoplasms / Q000453:epidemiology / Q000235:genetics* / Q000473:pathology; D016017:Odds Ratio; D011110:Polymorphism, Genetic; D014416:Tunisia / Q000453:epidemiology
chemical_list: D000071181:ATP Binding Cassette Transporter, Subfamily B, Member 2; D018528:ATP-Binding Cassette Transporters; C073119:TAP1 protein, human