Publication: Low level of efavirenz in HIV-1-infected Thai adults is associated with the CYP2B6 polymorphism
Issued Date
2014-01-01
Resource Type
ISSN
14390973
03008126
03008126
Other identifier(s)
2-s2.0-84901648608
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Infection. Vol.42, No.3 (2014), 469-474
Suggested Citation
C. Sukasem, W. Manosuthi, N. Koomdee, S. Santon, T. Jantararoungtong, S. Prommas, M. Chamnanphol, A. Puangpetch, S. Sungkanuparph Low level of efavirenz in HIV-1-infected Thai adults is associated with the CYP2B6 polymorphism. Infection. Vol.42, No.3 (2014), 469-474. doi:10.1007/s15010-013-0560-6 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/34629
Research Projects
Organizational Units
Authors
Journal Issue
Thesis
Title
Low level of efavirenz in HIV-1-infected Thai adults is associated with the CYP2B6 polymorphism
Abstract
Background: Human immunodeficiency virus type 1 (HIV-1) infections with a plasma efavirenz concentration of <1,000 ng/mL appear to have a high risk for the emergence of drug resistance. In the present study, we assessed the influence of the CYP2B6 polymorphism on the plasma efavirenz level. Methods: CYP2B6 T18492C (rs2279345) in 149 HIV-infected Thai adults were genotyped. Plasma efavirenz concentrations 12 h after dosing were measured using a validated high-performance liquid chromatography. The relationship between the plasma efavirenz level and the CYP2B6 T18492C polymorphism were analysed. Results: Among the 149 patients, the frequency of T18492C heterozygous (T/C) and homozygous mutant (C/C) was 38.26 % (n = 57) and 6.04 % (n = 9), respectively. In the entire cohort, the median efavirenz plasma concentration was 2,410 ng/mL [interquartile range (IQR) 1,460-4,120 ng/mL]. The plasma efavirenz concentration for patients with 18492CC (1,200 ng/mL, IQR 1,050-1,990 ng/mL) or 18492TC (1,900 ng/mL, IQR 1,320-2,510 ng/mL) genotypes were significantly lower than those with homozygous wild type (3,380 ng/mL, IQR 2,040-5,660 ng/mL), P-value < 0.001. Conclusions: The CYP2B6 T18492C polymorphism was significantly associated with lower efavirenz concentrations compared to those with homozygous wild type in HIV-1 infections. The genetic polymorphism CYP2B6 T18492C may be useful for the optimised efavirenz dose. Further studies in the clinical setting will need to be conducted before such an approach can be recommended for widespread use. © 2013 Springer-Verlag.