title: Determination of 3'-amino-3'-deoxythymidine, a cytotoxic metabolite of 3'-azido-3'-deoxythymidine, in human plasma by ion-pair high-performance liquid chromatography.
abstract: A sensitive high-performance liquid chromatographic assay has been developed to determine the levels of 3'-amino-3'-deoxythymidine (AMT), a cytotoxic metabolite of 3'-azido-3'-deoxy-thymidine (AZT, zidovudine), in human plasma. The sample pretreatment involved solid-phase extraction using cation-exchange extraction columns. Chromatography was carried out on a C8 column, using a mobile phase of methanol-0.01 M ammonium acetate (pH 5)-0.25 M sodium dioctylsulfosuccinate (60:40:4, v/v/v) and ultraviolet detection at 265 nm. The method has been validated, and stability tests under various conditions have been performed. The lower limit of quantitation is 5 ng/ml (using 500-microliters human plasma samples). The bioanalytical assay has been used for the determination of AMT in patients with AIDS who used AZT.
authors.affiliation: Department of Pharmacy, Slotervaart Hospital, Amsterdam, Netherlands.
authors.forename: D M
authors.initials: DM
authors.lastname: Burger
authors.forename: H
authors.initials: H
authors.lastname: Rosing
authors.forename: F J
authors.initials: FJ
authors.lastname: Koopman
authors.forename: P L
authors.initials: PL
authors.lastname: Mennhorst
authors.forename: J W
authors.initials: JW
authors.lastname: Mulder
authors.forename: A
authors.initials: A
authors.lastname: Bult
authors.forename: J H
authors.initials: JH
authors.lastname: Beijnen
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000097:blood; D002851:Chromatography, High Pressure Liquid; D002852:Chromatography, Ion Exchange; D015224:Dideoxynucleosides / Q000097:blood*; D006801:Humans; D013056:Spectrophotometry, Ultraviolet; D015215:Zidovudine / Q000097:blood* / Q000493:pharmacokinetics
chemical_list: D015224:Dideoxynucleosides; D015215:Zidovudine; C019252:3'-aminothymidine