Intracellular measurements of anti-HIV drugs indinavir, amprenavir, saquinavir, ritonavir, nelfinavir, lopinavir, atazanavir, efavirenz and nevirapine in peripheral blood mononuclear cells by liquid chromatography coupled to tandem mass spectrometry

Détails

ID Serval
serval:BIB_6FC687BADC2D
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Intracellular measurements of anti-HIV drugs indinavir, amprenavir, saquinavir, ritonavir, nelfinavir, lopinavir, atazanavir, efavirenz and nevirapine in peripheral blood mononuclear cells by liquid chromatography coupled to tandem mass spectrometry
Périodique
Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
Auteur(s)
Colombo  S., Beguin  A., Telenti  A., Biollaz  J., Buclin  T., Rochat  B., Decosterd  L. A.
ISSN
1570-0232 (Print)
Statut éditorial
Publié
Date de publication
05/2005
Volume
819
Numéro
2
Pages
259-76
Notes
Journal Article
Research Support, Non-U.S. Gov't
Validation Studies --- Old month value: May 25
Résumé
A sensitive and accurate liquid chromatography-tandem mass spectrometric (LC-MS/MS) method for the intracellular determination of nine antiretroviral drugs in human peripheral blood mononuclear cells (PBMCs) is proposed. PBMCs are isolated by density gradient centrifugation using Vacutainer CPT tubes and cell count is performed with a Coulter instrument. Single-step extraction of drugs from PBMCs pellets is performed with MeOH 50% (with clozapine added as internal standard, I.S.) and the supernatant is injected onto a 2.1 mm x 30 mm SymmetryShield 3.5 microm-RP18 column equipped with a 2.1 x 10 mm guard column. Chromatographic separations are performed using a gradient program with a mixture of 2 mM ammonium acetate containing 0.1% formic acid and acetonitrile with 0.1% formic acid. Analytes quantification is performed by electro-spray ionisation-triple quadrupole mass spectrometry using the selected reaction monitoring (SRM) detection mode. The positive mode is used for the HIV protease inhibitors (PIs) indinavir, amprenavir, saquinavir, ritonavir, nelfinavir, lopinavir, atazanavir and the non-nucleoside reverse transcriptase inhibitors (NNRTIs) nevirapine, and the negative mode is applied for efavirenz. The calibration curves are prepared using blank PBMCs spiked with antiretroviral drugs at concentrations ranging from 0.5 to 100 ng/ml of cell extracts and fitted to a quadratic regression model weighted by 1/(concentration)(2). The lower limit of quantification is less than 0.5 ng/ml. The mean extraction recovery for all PIs/NNRTIs is always above 88%. The method is precise, with mean inter-day CV% within 0.6-10.2%, and accurate (range of inter-day deviation from nominal values -7.2 to +8.3%). This analytical method can be conveniently used in clinical research for the assessment of intracellular levels of all PIs/NNRTIs commercially available at present using a simple one-step cell extraction of PBMCs followed by liquid chromatography coupled with tandem triple quadripole mass detection.
Mots-clé
Calibration Chromatography, High Pressure Liquid/*methods Drug Stability HIV Protease Inhibitors/*blood Humans Mass Spectrometry/*methods Monocytes/*chemistry Reference Standards Reproducibility of Results Reverse Transcriptase Inhibitors/*blood Sensitivity and Specificity
Pubmed
Web of science
Création de la notice
25/01/2008 8:47
Dernière modification de la notice
20/08/2019 14:28
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