Prevalence of CYP2B6 alleles in malaria-endemic populations of West Africa and Papua New Guinea

European Journal of Clinical Pharmacology
Rajeev K MehlotraPeter A Zimmerman

Abstract

Cytochrome P450 2B6 (CYP2B6) is involved in the metabolism of artemisinin drugs, a novel series of antimalarials. Our aim was to analyze the prevalence of the most commonly observed CYP2B6 alleles in malaria-endemic populations of West Africa (WA) and Papua New Guinea (PNG). Using a post-PCR ligation detection reaction-fluorescent microsphere assay, frequencies of CYP2B6*1A, *2, *3, *4, *5, *6, *7, and *9 were determined in WA (n=166) and PNG (n=174). To compare with the results of previous studies, we also determined the allele frequencies in 291 North Americans of various ethnic groups. Significant differences were observed between WA and PNG for the frequencies of alleles CYP2B6*1A (45% vs 33%, P = 0.003), *2 (4% vs. 0%, P<0.001), *6 (42% vs 62%, P<0.001), and *9 (8% vs 1%, P<0.001), and genotypes *1A/*9 (9% vs 0%, P<0.001) and *6/*6 (17% vs 43%, P<0.001). The frequencies of CYP2B6 genotypes in the populations were in Hardy-Weinberg equilibrium, except for PNG where an overall significant deficit of heterozygosity was observed (H (O)=0.431, H (E)=0.505, P=0.004). The allele frequencies in Asian-Americans and Caucasians-Americans were comparable to those documented for Japanese and Caucasian populations. CYP2B6 variants, prev...Continue Reading

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