title: Simultaneous quantification of buprenorphine, norbuprenorphine, buprenorphine glucuronide, and norbuprenorphine glucuronide in human placenta by liquid chromatography mass spectrometry.
abstract: A LCMS method was developed and validated for the determination of buprenorphine (BUP), norbuprenorphine (NBUP), buprenorphine glucuronide (BUP-Gluc), and norbuprenorphine glucuronide (NBUP-Gluc) in placenta. Quantification was achieved by selected ion monitoring of m/z 468.4 (BUP), 414.3 (NBUP), 644.4 (BUP-Gluc), and 590 (NBUP-Gluc). BUP and NBUP were identified monitoring MS(2) fragments m/z 396, 414 and 426 for BUP, and 340, 364 and 382 for NBUP, and glucuronide conjugates monitoring MS(3) fragments m/z 396 and 414 for BUP-Gluc, and 340 and 382 for NBUP-Gluc. Linearity was 1-50 ng/g. Intra-day, inter-day and total assay imprecision (% RSD) were <13.4%, and analytical recoveries were 96.2-113.1%. Extraction efficiencies ranged from 40.7-68%, process efficiencies 38.8-70.5%, and matrix effect 1.3-15.4%. Limits of detection were 0.8 ng/g for all compounds. An authentic placenta from an opioid-dependent pregnant woman receiving BUP pharmacotherapy was analyzed. BUP was not detected but metabolite concentrations were NBUP-Gluc 46.6, NBUP 15.7 and BUP-Gluc 3.2 ng/g.
authors.affiliation: Chemistry and Drug Metabolism, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Biomedical Research Center (BRC), 251 Bayview Boulevard, Suite 200, Room 05A721, Baltimore, MD, 21224, USA.
authors.forename: Marta
authors.initials: M
authors.lastname: Concheiro-Guisan
authors.forename: Diaa M
authors.initials: DM
authors.lastname: Shakleya
authors.forename: Marilyn A
authors.initials: MA
authors.lastname: Huestis
mesh_terms: D002047:Buprenorphine / Q000031:analogs & derivatives* / Q000032:analysis* / Q000737:chemistry; D002853:Chromatography, Liquid / Q000295:instrumentation* / Q000379:methods*; D005260:Female; D020719:Glucuronides / Q000737:chemistry*; D006801:Humans; D013058:Mass Spectrometry / Q000295:instrumentation / Q000379:methods*; D010920:Placenta / Q000737:chemistry* / Q000378:metabolism; D011247:Pregnancy
chemical_list: D020719:Glucuronides; D002047:Buprenorphine