title: High-performance liquid chromatographic assay to determine the plasma levels of HIV-protease inhibitors (amprenavir, indinavir, nelfinavir, ritonavir and saquinavir) and the non-nucleoside reverse transcriptase inhibitor (nevirapine) after liquid-liquid extraction.
abstract: A single HPLC assay was developed for therapeutic drug monitoring of 5 HIV protease inhibitors (indinavir, amprenavir, saquinavir, ritonavir, nelfinavir) and a non-nucleoside reverse transcriptase inhibitor (nevirapine) in human plasma. After liquid-liquid extraction in a mixture ethyl acetate-hexane, compounds are separated on a C18 column with a gradient elution of solvent A [acetonitrile and 0.025 M tetramethylammonium perchlorate in 0.2% aqueous trifluoroacetic acid (55:45 (v/v))] and solvent B [methanol and 0.025 M tetramethylammonium perchlorate in 0.2% aqueous trifluoroacetic acid (55:45 (v/v))]. The compounds are detected at various wavelengths: 320 nm (nevirapine), 259 nm (indinavir), 254 nm (amprenavir, nelfinavir, saquinavir) and 239 nm (ritonavir). The intra-day and inter-day precision and accuracy are lower than 15%. The limits of quantitation are 0.05 mg/l (amprenavir), 0.2 mg/l (indinavir, saquinavir, nelfinavir) and 0.4 mg/l (ritonavir, nevirapine). This method which allows to estimate simultaneously plasma levels of protease inhibitors and nevirapine can be used for therapeutic drug monitoring.
authors.affiliation: Laboratoire de Pharmacologie Clinique, Institut de Biologie, Centre Hospitalier-Universitaire, Nantes, France.
authors.forename: E
authors.initials: E
authors.lastname: Dailly
authors.forename: L
authors.initials: L
authors.lastname: Thomas
authors.forename: M F
authors.initials: MF
authors.lastname: Kergueris
authors.forename: P
authors.initials: P
authors.lastname: Jolliet
authors.forename: M
authors.initials: M
authors.lastname: Bourin
mesh_terms: D002138:Calibration; D002219:Carbamates; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005663:Furans; D017320:HIV Protease Inhibitors / Q000097:blood*; D006801:Humans; D019469:Indinavir / Q000097:blood; D019888:Nelfinavir / Q000097:blood; D019829:Nevirapine / Q000097:blood*; D012015:Reference Standards; D015203:Reproducibility of Results; D018894:Reverse Transcriptase Inhibitors / Q000097:blood*; D019438:Ritonavir / Q000097:blood; D019258:Saquinavir / Q000097:blood; D012680:Sensitivity and Specificity; D013449:Sulfonamides / Q000097:blood
chemical_list: D002219:Carbamates; D005663:Furans; D017320:HIV Protease Inhibitors; D018894:Reverse Transcriptase Inhibitors; D013449:Sulfonamides; C095108:amprenavir; D019469:Indinavir; D019829:Nevirapine; D019888:Nelfinavir; D019258:Saquinavir; D019438:Ritonavir