HLA class-I and HLA class-II phenotypic, gene and haplotypic frequencies in Tunisians by using molecular typing data

Tissue Antigens
K AyedL Gebuhrer

Abstract

The aim of this study is to define a reliable reckoning of gene frequencies and six-locus haplotypic frequencies of HLA-A, HLA-B, HLA-C, HLA-DRB1, HLA-DQA1, HLA-DQB1 and HLA-DPB1 in the Tunisian population. One hundred unrelated random, healthy people originating from various parts of Tunisia were typed for the alleles of the loci mentioned above by using the molecular techniques polymerase chain reaction--hybridization with oligonucleotide probe (PCR-SSO) and sequence specific primers (SSP). The population studied appeared to be in Hardy-Weinberg equilibrium. Allelic frequency distributions were observed at each locus. The most frequent HLA-A alleles were HLA-A*02 (39%) HLA-A*0101 (25%), HLA-A*30 (21%) and HLA-A*2301 (18%). Moreover, HLA-3A*3601, HLA-1A*6601, HLA-1A*3402 and HLA-2A*8001 were found; however, no HLA-A*4301 was detected. For the HLA-B locus, the most common in descending order were HLA-B*44 (22%), HLA-B*5001 (19%), HLA-B*51 (16%) and HLA-B*18 (15%). Among the 28 alleles HLA-Cw detected, HLA-Cw*6 and HLA-Cw*7 were highly predominant with the frequencies of 33 and 30%, respectively. For the HLA class-II loci, HLA-DRB1*0701, HLA-DRB1*11, HLA-DRB1*13 and HLA-DRB1*03 were the most frequent DR alleles. For the HLA-DPB1...Continue Reading

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