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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

CYP3A5 genotype predicts renal CYP3A activity and blood pressure in healthy adults.

A single-nucleotide polymorphism (A6986G) in the cytochrome p-450 3A5 (CYP3A5) gene distinguishes an expressor (*1) and a reduced-expressor (*3) allele and largely predicts CYP3A5 content in liver and intestine. CYP3A5 is the prevailing CYP3A isoform in kidney. We report that, among renal microsomes from 21 organ donors, those from *1/*3 individuals had at least eightfold higher mean kidney microsomal CYP3A5 content and 18-fold higher mean CYP3A catalytic activity than did those from *3/*3 individuals (P = 0.0001 and P = 0.0137, respectively). We also report significant associations between the A6986G polymorphism and systolic blood pressure (P = 0.0007), mean arterial pressure (P = 0.0075), and creatinine clearance (P = 0.0035) among 25 healthy African-American adults. These associations remained significant when sex, age, and body mass index were taken into account. The mean systolic blood pressure of homozygous CYP3A5 expressors (*1/*1) exceeded that of homozygous nonexpressors (*3/*3) by 19.3 mmHg. We speculate whether a high CYP3A5 expressor allele frequency among African-Americans may contribute to a high prevalence of sodium-sensitive hypertension in this population.[1]


  1. CYP3A5 genotype predicts renal CYP3A activity and blood pressure in healthy adults. Givens, R.C., Lin, Y.S., Dowling, A.L., Thummel, K.E., Lamba, J.K., Schuetz, E.G., Stewart, P.W., Watkins, P.B. J. Appl. Physiol. (2003) [Pubmed]
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