Effects of age and genetic variations in VKORC1, CYP2C9 and CYP3A4 on the phenprocoumon dose in pediatric patients

Hedy Maagdenberg, Marc B. Bierings, C. Heleen Van Ommen, Felix J.M. Van Der Meer, Inge M. Appel, Rienk Y.J. Tamminga, Saskia Le Cessie, Jesse J. Swen, Tahar Van Der Straaten, Anthonius De Boer, Anke H. Maitland-Van Der Zee

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

Aim: To study the effects of clinical and genetic factors on the phenprocoumon dose requirement in pediatric patients and to develop a dosing algorithm. Methods: Pediatric patients who used phenprocoumon were invited to participate in a retrospective follow-up study. Clinical information and genotypes of genetic variations in CYP2C9, VKORC1, CYP4F2, CYP2C18 and CYP3A4 were collected and tested with linear regression for association with phenprocoumon dose requirement. Results: Of the 41 patients included in the analysis, age, VKORC1, CYP2C9∗2/∗3 and CYP3A4∗1B were statistically significantly associated with dose requirement, and together explained 80.4% of the variability in phenprocoumon dose requirement. Conclusion: Our study reveals that age and genetic variations explain a significant part of the variability in phenprocoumon dose requirement in pediatric patients.
Original languageEnglish
Pages (from-to)1195-1202
Number of pages8
JournalPharmacogenomics
Volume19
Issue number15
DOIs
Publication statusPublished - 1 Oct 2018

Keywords

  • adolescent
  • anticoagulation
  • child
  • infant
  • pharmacogenomics
  • phenprocoumon
  • thrombosis
  • article
  • clinical article
  • controlled study
  • drug therapy
  • female
  • follow up
  • genetic variation
  • genotype
  • human
  • linear regression analysis
  • male
  • pediatric patient
  • retrospective study
  • cytochrome P450 2C18
  • cytochrome P450 2C9
  • cytochrome P450 3A4
  • endogenous compound

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