HLA-DR and -DQ polymorphism in Cameroon

HLA-DRB1, -DQA1 and -DQB1 allele frequencies were determined by high-resolu tion polymerase chain reaction using sequence-specific oligonucleotide prob es (PCR-SSOP) and/or DNA sequencing in 126 healthy individuals in Cameroon. Eighteen DRB1, 11 DQA1, and 18 DQB1 alleles were observed. The most common alleles at each locus were DRBI*1503 (29%), DRB1*1301 (13%); DQA1*0102 (38 %), DQA1*0302 (11%), DQA1*0401 (11%); and DQB1*0602 (31%), DQB1*0301 (13%), DQB1*0501 (12%). Forty-four different haplotypes were identified including 12 novel haplotypes demonstrating the HLA class II diversity resulting fro m allele combinations in this population. A single predominant DRB1*1503-DQ A1*0102-DQB1*0602 haplotype was observed with a frequency of 27%. In summar y, this study of ALA class II polymorphism in Cameroon demonstrates the ext ent of diversity in this population.