alexa Polymorphisms of OATP-C (SLC21A6) and OAT3 (SLC22A8) genes: consequences for pravastatin pharmacokinetics.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Pharmacogenomics & Pharmacoproteomics

Author(s): Nishizato Y, Ieiri I, Suzuki H, Kimura M, Kawabata K,

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Abstract OBJECTIVE: Our objective was to quantitate the contribution of the genetic polymorphisms of the genes for 2 human organic anion transporters-organic anion transporting polypeptide C (OATP-C) and organic anion transporter 3 (OAT3)-to the pharmacokinetics of pravastatin. METHODS: Genetic polymorphisms were screened by polymerase chain reaction-single-strand conformation polymorphism analysis, after sequencing with deoxyribonucleic acid obtained from 120 healthy volunteers. To examine whether polymorphisms in these 2 genes of interest alter transport activity, we conducted a clinical study (n = 23) with pravastatin as a selective probe drug. RESULTS: Among 120 healthy individuals, 5 nonsynonymous variants and 1 nonsynonymous variant were observed in the OATP-C and OAT3 genes, respectively. The polymorphisms in the OAT3 gene did not appear to be associated with changes in renal and tubular secretory clearance. In contrast, the OATP-C variants were associated with differences in the disposition kinetics of pravastatin. Subjects with the OATP-C*15 allele (Asp130Ala174) had a reduced total and nonrenal clearance, as compared with those with the OATP-C*1b allele (Asp130Val174); nonrenal clearance values in *1b/*1b (n = 4), *1b/*15 (n = 9), and *15/*15 (n = 1) subjects were 2.01 +/- 0.42 L. kg(-1). h(-1), 1.11 +/- 0.34 L. kg(-1). h(-1), and 0.29 L. kg(-1). h(-1), respectively, and the difference between *1b/*1b and *1b/*15 subjects was significant (P <.05). CONCLUSION: Certain commonly occurring single-nucleotide polymorphisms in OATP-C, such as T521C (Val174Ala), are likely to be associated with altered pharmacokinetics of pravastatin. Large clinical studies are needed to confirm these observations. This article was published in Clin Pharmacol Ther and referenced in Journal of Pharmacogenomics & Pharmacoproteomics

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