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Influence of coagulation factor, vitamin K epoxide reductase complex subunit 1, and cytochrome P450 2C9 gene polymorphisms on warfarin dose requirements

AQUILANTE, C, LANGAEE, T, LOPEZ, L, YARANDI, H, TROMBERG, J, MOHUCZY, D, GASTON, K, WADDELL, C, CHIRICO, M, JOHNSON, J·2006·Clinical Pharmacology & Therapeutics

Abstract

INTRODUCTION: The primary objective of this study was to determine whether variability in warfarin dose requirements is determined by common polymorphisms in genes whose products are involved in the pharmacodynamics and pharmacokinetics of warfarin, namely, the coagulation factors, vitamin K epoxide reductase complex subunit 1 (VKORC1), and cytochrome P450 (CYP) 2C9. METHODS: Patients (N = 350) receiving stable doses of warfarin at 3 consecutive visits were enrolled, and a deoxyribonucleic acid sample was collected. Samples were genotyped for polymorphisms in the factor II, factor VII, factor X, VKORC1, and CYP2C9 genes. A stepwise linear regression analysis was used to determine the independent effects of genetic and nongenetic factors on mean warfarin dose requirements. RESULTS: Variables associated with lower warfarin dose requirements were VKORC1 3673 AA genotype (P < .0001), VKORC1 3673 GA genotype (P < .0001), 1 variant CYP2C9 allele (P < .0001), 2 variant CYP2C9 alleles (P = .0004), increasing age (P = .0005), concomitant CYP2C9 inhibitors (P = .0005), and goal international normalized ratio (P = .01). Variables associated with higher warfarin dose requirements were weight (P < .0001), current smoker status (P = .0009), mean international normalized ratio (P = .001), concomitant CYP2C9 inducers (P = .006), factor X insertion/deletion genotype (P = .01), factor X insertion/insertion genotype (P = .04), factor VII deletion/deletion genotype (P = .04), and calculated vitamin K intake (P = .05). The linear regression model explained 51.4% of the variability in warfarin dose requirements. CONCLUSION: Polymorphisms in warfarin drug target and metabolizing enzyme genes, in addition to nongenetic factors, were important determinants of warfarin dose requirements.

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Metadata

Authors
AQUILANTE, C., LANGAEE, T., LOPEZ, L., YARANDI, H., TROMBERG, J., MOHUCZY, D., GASTON, K., WADDELL, C., CHIRICO, M., & JOHNSON, J.
Venue
Clinical Pharmacology & Therapeutics
Publisher
Wiley
Published
2006-04
Volume
79
Issue
4
Pages
291-302
ISSN
0009-9236 (ISSN-L)
OpenAlex
W2170483665
Cited by
266
References
31
FWCI
27.40
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Influence of coagulation factor, vitamin K epoxide reductase complex subunit 1, and cytochrome P450 2C9 gene polymorphisms on warfarin dose requirements. https://app.cochat.ai/papers/10.1016/j.clpt.2005.11.011
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AQUILANTE, C., LANGAEE, T., LOPEZ, L., YARANDI, H., TROMBERG, J., MOHUCZY, D., GASTON, K., WADDELL, C., CHIRICO, M., & JOHNSON, J. (2006). Influence of coagulation factor, vitamin K epoxide reductase complex subunit 1, and cytochrome P450 2C9 gene polymorphisms on warfarin dose requirements. Clinical Pharmacology & Therapeutics. https://doi.org/10.1016/j.clpt.2005.11.011

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

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