HLA-A23 (A23) is a human leukocyte antigen serotype within HLA-A serotype group. The serotype is determined by the antibody recognition of α23 subset of HLA-A α-chains. For A23, the alpha, "A", chain are encoded by the HLA-A*23 allele group and the β-chain are encoded by B2M locus.[1] This group currently is dominated by A*2301. A23 and A*23 are almost synonymous in meaning. A23 is a split antigen of the broad antigen HLA-A9 and it is a sister serotype of HLA-A24.
A23 is common in Africa and regions of the Middle East, Mediterranean, and India than Europe, East Asia or the Americas.
Serotype
| A*23 | A23 | A24 | Sample |
| allele | % | % | size (N) |
| *2301 | 95 | 1 | 5119 |
Allele
Haplotypes
A23-B7 is found in N.Afr. and S.Afr non-caucasians.
A23-B44 is found in Albania, Zimbabwe, Morocco, Spain and Danes.
A23-B58 is found in the !kung and Zaire.
Associated diseases
A*23:Cw*07 is associated with higher viral load in HIV[4]
References
- ^ Arce-Gomez B, Jones EA, Barnstable CJ, Solomon E, Bodmer WF (February 1978). "The genetic control of HLA-A and B antigens in somatic cell hybrids: requirement for beta2 microglobulin". Tissue Antigens. 11 (2): 96–112. doi:10.1111/j.1399-0039.1978.tb01233.x. PMID 77067.
- ^ Allele Query Form IMGT/HLA - European Bioinformatics Institute
- ^ Middleton, D.; Menchaca, L.; Rood, H.; Komerofsky, R. (2003). "New allele frequency database: http://www.allelefrequencies.net". Tissue Antigens. 61 (5): 403–407. doi:10.1034/j.1399-0039.2003.00062.x. PMID 12753660.
- ^ Tang J, Tang S, Lobashevsky E, Myracle A, Fideli U, Aldrovandi G, Allen S, Musonda R, Kaslow R (2002). "Favorable and unfavorable HLA class I alleles and haplotypes in Zambians predominantly infected with clade C human immunodeficiency virus type 1". J Virol. 76 (16): 8276–84. doi:10.1128/JVI.76.16.8276-8284.2002. PMC 155130. PMID 12134033.
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