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We investigated human leukocyte antigen (HLA) profiles for Tunisians with nasopharyngeal carcinoma (NPC), their families, and a sample of unrelated healthy Tunisians in order to identify HLA specificities associated with familial NPC. HLA-A, -B, and -DRB1 typing was successful for 36 NPC patients, 72 unaffected family members, and 130 community controls, and the chi square or Fisher exact test was used to compare allele frequencies between cases and controls. We observed a consistent protective effect of HLA-DRB1*10 on NPC development. However, none of the NPC patients or their family members had a positive result for this HLA marker (0% vs 9.2% in controls, P = 0.047). In addition, HLA-A*26 was probably an induction marker, as its allelic frequency was significantly higher among NPC patients than among controls (P = 0.003) and among NPC patients than among at-risk family members (P = 0.067). Logistic regression analysis of the joint effect of selected HLA specificities showed that HLA-A*26 and HLA-A*30 were co-associated and have an important effect on NPC risk. Despite the small size of our cohort, we showed that HLA-A*26-A*30 and HLA-DRB1*10 might be predictive markers for NPC screening of Tunisian families with a high risk of NPC.

HLA-A*26-A*30 and HLA-DRB1*10 could be predictors of nasopharyngeal carcinoma risk in high-risk Tunisian families

HLA-A26-A30 and HLA-DRB1*10 could be predictors of nasopharyngeal carcinoma risk in high-risk Tunisian families