Association of polymorphisms in EPHX1, UGT2B7, ABCB1, ABCC2, SCN1A and SCN2A genes with carbamazepine therapy optimization
| Autor: | Hsiao-Ching Huang, Horng-Huei Liou, Jia-Ling Ho, Tsung-Jen Hsieh, Chin-Chuan Hung, Wei-Lun Chang, John Jen Tai, Yow-Wen Hsieh |
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| Rok vydání: | 2011 |
| Předmět: |
Adult
Male Candidate gene ATP Binding Cassette Transporter Subfamily B Nerve Tissue Proteins EPHX1 Pharmacology Biology Polymorphism Single Nucleotide Sodium Channels Pharmacokinetics Genetics medicine Humans ATP Binding Cassette Transporter Subfamily B Member 1 Allele Glucuronosyltransferase Genetic Association Studies Epoxide Hydrolases Epilepsy NAV1.2 Voltage-Gated Sodium Channel Dose-Response Relationship Drug Haplotype Carbamazepine Middle Aged Multidrug Resistance-Associated Protein 2 UGT2B7 NAV1.1 Voltage-Gated Sodium Channel Haplotypes Pharmacodynamics Molecular Medicine Anticonvulsants Female Multidrug Resistance-Associated Proteins medicine.drug |
| Zdroj: | Pharmacogenomics. 13(2) |
| ISSN: | 1744-8042 |
| Popis: | Aim: Carbamazepine (CBZ) is one of the most widely used antiepileptic drugs. The aim of the present study is to investigate the impacts of polymorphisms in genes related to pharmacokinetic and pharmacodynamic pathways of CBZ on the large interindividual variability in dosages and concentrations. Methods & results: Genetic polymorphisms in the candidate genes were detected in 234 epileptic patients under maintenance CBZ monotherapy by real-time PCR and PCR-RFLP. Results of statistical analysis demonstrated that carriers of the variant SCN1A IVS5–91G>A and EPHX1 c.337T>C allele tended to require higher CBZ dosages and lower ln(concentration–dose ratios) than noncarriers (p < 0.0001) and the homozygous carriers also seemed to require higher CBZ dosages and lower ln(concentration–dose ratios) (p < 0.0001). In addition, the multiple regression model of concentration–dose ratio of CBZ also revealed that genetic variants in SCN1A, EPHX1 and UGT2B7 genes interactively affect the concentration–dose ratio of CBZ (adjusted r2 = 55%). Conclusion: The present study identified genetic factors associated with CBZ therapy optimization and provided useful information for individualized CBZ therapy in epileptic patients. Further studies in larger populations are needed to confirm our results. Original submitted: 22 July 2011; Revision submitted: 27 September 2011 |
| Databáze: | OpenAIRE |
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