CYP2A6 genetic variation and dexmedetomidine disposition
| Autor: | Pratik P. Pandharipande, Daniel Kurnik, Leena Choi, Rachel F. Tyndale, Mika Scheinin, Mordechai Muszkat, Alastair J. J. Wood, Gbenga G. Sofowora, E. Wesley Ely, Utkarsh Kohli, Eitan A. Friedman, C. Michael Stein |
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| Rok vydání: | 2012 |
| Předmět: |
Male
Genotype Sedation Pharmacology toxicology Article Cytochrome P-450 CYP2A6 Intensive care Genetic variation medicine Humans Hypnotics and Sedatives Pharmacology (medical) Dexmedetomidine CYP2A6 Alleles Pharmacology business.industry Genetic Variation Bayes Theorem General Medicine Disposition Middle Aged Intensive Care Units Anesthesia Female Aryl Hydrocarbon Hydroxylases medicine.symptom business Pharmacogenetics medicine.drug |
| Zdroj: | European Journal of Clinical Pharmacology. 68:937-942 |
| ISSN: | 1432-1041 0031-6970 |
| DOI: | 10.1007/s00228-011-1208-z |
| Popis: | There is a large interindividual variability in dexmedetomidine dose requirements for sedation of patients in intensive care units (ICU). Cytochrome P450 2A6 (CYP2A6) mediates an important route of dexmedetomidine metabolism, and genetic variation in CYP2A6 affects the clearance of other substrate drugs. We examined whether CYP2A6 genotypes affect dexmedetomidine disposition.In 43 critically ill ICU patients receiving dexmedetomidine infusions adjusted to achieve the desired level of sedation, we determined a median of five plasma dexmedetomidine concentrations each. Forty subjects were genotyped for five common CYP2A6 alleles and grouped into normal (n = 33), intermediate (n = 5), and slow metabolizers (n = 2).Using a Bayesian hierarchical nonlinear mixture model, estimated dexmedetomidine clearance was 49.1 L/h (posterior mean; 95% credible interval 41.4-57.6 L/h). There were no significant differences in dexmedetomidine clearance among normal, intermediate, and slow CYP2A6 metabolizer groups.Genetic variation in CYP2A6 does not appear to be an important determinant of dexmedetomidine clearance in ICU patients. |
| Databáze: | OpenAIRE |
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