title: Simultaneous determination of six HIV protease inhibitors (amprenavir, indinavir, lopinavir, nelfinavir, ritonavir and saquinavir), the active metabolite of nelfinavir (M8) and non-nucleoside reverse transcriptase inhibitor (efavirenz) in human plasma by high-performance liquid chromatography.
abstract: We report the development of a simple, economical and reliable chromatographic method for the simultaneous determination of six HIV protease inhibitors (PIs; amprenavir, indinavir, lopinavir, nelfinavir, ritonavir and saquinavir), the active metabolite of nelfinavir (M8) and the non-nucleoside reverse transcriptase inhibitor (NNRTI; efavirenz) in human plasma. After extraction from plasma with an ethyl acetate-acetonitrile mixture, the analytes were separated on a phenyl column with a gradient of acetonitrile and phosphate solutions, and detected at three ultraviolet wavelengths. Calibration curves were linear over the range 0.025-15 microg/mL for saquinavir and 0.05-15 microg/mL for the other analytes. The accuracies ranged from -6.9% to +7.6%, and the intra-assay and inter-assay precisions were <9.2 and <11.8%, respectively. Our method, covering most of the PIs and NNRTIs currently used, facilitates ready therapeutic drug monitoring in hospital laboratories.
authors.affiliation: AIDS Clinical Center, International Medical Center of Japan, 1-21-1 Toyama, Shinjuku-ku, Tokyo 162-8655, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Hirabayashi
authors.forename: Kiyoto
authors.initials: K
authors.lastname: Tsuchiya
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kimura
authors.forename: Shinichi
authors.initials: S
authors.lastname: Oka
mesh_terms: D000480:Alkynes; D048588:Benzoxazines; D002138:Calibration; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D003521:Cyclopropanes; D017320:HIV Protease Inhibitors / Q000097:blood*; D006801:Humans; D010078:Oxazines / Q000097:blood*; D018894:Reverse Transcriptase Inhibitors / Q000097:blood*; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000480:Alkynes; D048588:Benzoxazines; D003521:Cyclopropanes; D017320:HIV Protease Inhibitors; D010078:Oxazines; D018894:Reverse Transcriptase Inhibitors; C098320:efavirenz