alexa Association of the genetic marker for abacavir hypersensitivity HLA-B*5701 with HCP5 rs2395029 in Mexican Mestizos.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Pharmacogenomics & Pharmacoproteomics

Author(s): SanchezGiron F, VillegasTorres B, JaramilloVillafuerte K, SilvaZolezzi I, FernandezLopez JC,

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Abstract Prospective screening for HLA-B*5701 decreases or abolishes abacavir hypersensitivity reaction. In Caucasians, the HLA complex protein 5 gene (HCP5) rs2395029(G) allele is in complete linkage disequilibrium (LD) with HLA-B*5701 (r(2) = 1). AIM: To assess the frequency of HLA-B*5701 and its LD with HCP5 rs2395029(G) allele, to extend our knowledge of genetic variants that are of critical relevance for the development of pharmacogenetics in Mexico. MATERIALS & METHODS: We genotyped 300 Mexican Mestizos from the Mexican Genome Diversity Project. HLA-B*5701 genotyping was performed using a DNA sequencing method. HCP5 rs2395029 was genotyped using a custom TaqMan(®) SNP genotyping assay and confirmed by direct sequencing. Genotypes for 14 SNPs in the HCP5 region were retrieved from the Mexican Genome Diversity Project database for LD analysis. RESULTS: HLA-B*5701 carrier frequency was 2\% and the allelic frequency was 0.010. Haplotype analysis revealed that HLA-B*5701 and the HCP5 rs2395029(G) allele are in complete LD (r(2) = 1) in this Mexican Mestizos sample. CONCLUSION: It is feasible to have a pharmacogenetic program based on HCP5 rs2395029 genotyping as a screening tool with confirmation of HLA-B*5701 carriage by sequenciation, to prevent abacavir hypersensitivity reaction in Mexican patients before initiating abacavir therapy. This article was published in Pharmacogenomics and referenced in Journal of Pharmacogenomics & Pharmacoproteomics

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