Single nucleotide polymorphisms of ABCB1 (MDR1) gene and distinct haplotype profile in a West Black African population.

Abstract:

OBJECTIVE:The ABCB1 (MDR1) multidrug transporter plays a key role in determining drug bioavailability. Differences in drug response exist among different ethnic groups. However, until now, no haplotype data are available in a Black African population. METHODS:Exons 2, 7, 10, 11, 12, 14, 17, 21, 26, and the surrounding intronic regions were sequenced using genomic DNA from 111 Beninese subjects to examine 19 intragenic single nucleotide polymorphisms (SNPs). Linkage disequilibrium analysis and haplotypes were generated using the expectation-maximization algorithm. RESULTS:We identified 12 SNPs, 3 of which were novel: IVS9-57delA, IVS9-8T>A, 1662G>C (exon 14). The most common SNP was IVS14+38A>G. At the MRD1 locus, 53 haplotypes were inferred from the SNP data sets. The 4 SNPs, IVS6+139C>T, IVS9-44A>G, 1236C>T, and 3435C>T, showed strong linkage disequilibrium with each other, confirming the block concept. Moreover, our findings suggest that ABCB1 exonic SNPs are less frequently observed in our population than in African-Americans. CONCLUSION:Our data are compatible with a close evolutionary relationship in Black Africans from Benin.

journal_name

Eur J Clin Pharmacol

authors

Allabi AC,Horsmans Y,Issaoui B,Gala JL

doi

10.1007/s00228-004-0879-0

subject

Has Abstract

pub_date

2005-04-01 00:00:00

pages

97-102

issue

2

eissn

0031-6970

issn

1432-1041

journal_volume

61

pub_type

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