title: Simultaneous determination of zidovudine and lamivudine from rat tissues by liquid chromatography/tandem mass spectrometry.
abstract: A simple liquid chromatography/tandem mass spectrometry (LC/MS/MS) method has been developed and validated for the simultaneous determination of zidovudine (AZT) and lamivudine (3TC) in rat plasma, amniotic fluid, placental, and fetal tissues. Samples were processed by acetonitrile precipitation. Chromatography was performed using a C18 column (5 microm, 150 x 3.9 mm i.d). The mobile phase consisted of 30% methanol and 7.5 mM ammonium acetate (pH 6.5). The method was validated in the range of 0.05-25 microg/mL for both 3TC and AZT in the four biological matrices. Finally, the method was applied to a study involving fetal transport following co-administration of these compounds at a dose of 25 mg/kg each in a pregnant rat.
authors.affiliation: Department of Pharmaceutical and Biomedical Sciences, College of Pharmacy, The University of Georgia, Athens, Georgia, 30602-2352, USA.
authors.forename: Yazen
authors.initials: Y
authors.lastname: Alnouti
authors.forename: Summer R
authors.initials: SR
authors.lastname: Lewis
authors.forename: Catherine A
authors.initials: CA
authors.lastname: White
authors.forename: Michael G
authors.initials: MG
authors.lastname: Bartlett
mesh_terms: D000653:Amniotic Fluid / Q000737:chemistry / Q000378:metabolism; D000818:Animals; D019380:Anti-HIV Agents / Q000008:administration & dosage / Q000493:pharmacokinetics*; D004359:Drug Therapy, Combination; D005260:Female; D005333:Fetus / Q000737:chemistry / Q000378:metabolism; D007275:Injections, Intravenous; D019259:Lamivudine / Q000008:administration & dosage / Q000493:pharmacokinetics*; D010920:Placenta / Q000737:chemistry / Q000378:metabolism; D011247:Pregnancy; D051381:Rats; D017207:Rats, Sprague-Dawley; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*; D014018:Tissue Distribution; D015215:Zidovudine / Q000008:administration & dosage / Q000493:pharmacokinetics*
chemical_list: D019380:Anti-HIV Agents; D019259:Lamivudine; D015215:Zidovudine