Pharmacokinetics of sertraline in relation to genetic polymorphism of CYP2C19

Clin Pharmacol Ther. 2001 Jul;70(1):42-7. doi: 10.1067/mcp.2001.116513.

Abstract

Objective: Our objective was to evaluate the relationship between the disposition of sertraline and the presence of the CYP2C19 gene and to define the contribution of cytochrome P450 2C19 (CYP2C19) to sertraline N-demethylation.

Methods: A single oral 100-mg dose of sertraline was administered to 6 subjects who were extensive metabolizers and 6 subjects who were poor metabolizers recruited from 77 healthy Chinese volunteers whose genotypes were predetermined by polymerase chain reaction-based amplification, followed by restriction fragment length polymorphism analysis. Phenotypes were determined by use of the omeprazole metabolic rate. The plasma concentrations of sertraline and desmethylsertraline were determined by gas chromatography with electron-capture detection.

Results: Six poor metabolizers with m1 mutation had area under the plasma concentration versus time curve (AUC(0-infinity)) values (983.6 +/- 199.3 microg x h/L versus 697.6 +/- 133.0 microg x h/L; P <.05) and terminal elimination half-life values of sertraline (35.5 +/- 5.6 hours versus 23.5 +/- 4.4 hours; P <.01) that were significantly higher than the values in 6 extensive metabolizers who were either homozygous or heterozygous for CYP2C19*1. The oral clearance of sertraline in poor metabolizers (105.3 +/- 19.4 L/h) was significantly lower than that of extensive metabolizers (148.4 +/- 28.6 L/h). The area under the concentration-time curve from 0 to 144 hours and the maximum plasma concentration of desmethylsertraline in poor metabolizers were significantly lower than the values of extensive metabolizers (627.6 +/- 203.8 microg x h/L versus 972.1 +/- 270.3 microg x h/L; P <.05; and 23.6 +/- 6.5 nmol/L versus 32.4 +/- 8.2 nmol/L; P <.01; respectively).

Conclusions: The polymorphic CYP2C19 appears to be a major enzyme involved in the N-demethylation of sertraline, and both extensive and poor metabolizers had marked differences in the disposition of sertraline.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Administration, Oral
  • Adult
  • Antidepressive Agents / pharmacokinetics
  • Area Under Curve
  • Aryl Hydrocarbon Hydroxylases*
  • Asians / genetics*
  • China / ethnology
  • Chromatography, Gas
  • Cytochrome P-450 CYP2C19
  • Cytochrome P-450 Enzyme System / genetics*
  • Cytochrome P-450 Enzyme System / metabolism
  • Female
  • Genotype
  • Humans
  • Male
  • Mixed Function Oxygenases / genetics*
  • Mixed Function Oxygenases / metabolism
  • Phenotype
  • Polymorphism, Genetic
  • Reference Values
  • Serotonin Uptake Inhibitors / administration & dosage
  • Serotonin Uptake Inhibitors / blood
  • Serotonin Uptake Inhibitors / pharmacokinetics*
  • Sertraline / administration & dosage
  • Sertraline / analogs & derivatives*
  • Sertraline / blood
  • Sertraline / pharmacokinetics*
  • Time Factors

Substances

  • Antidepressive Agents
  • Serotonin Uptake Inhibitors
  • Cytochrome P-450 Enzyme System
  • desmethylsertraline
  • Mixed Function Oxygenases
  • Aryl Hydrocarbon Hydroxylases
  • CYP2C19 protein, human
  • Cytochrome P-450 CYP2C19
  • Sertraline