title: Quantitative determination of telavancin in pregnant baboon plasma by solid-phase extraction and LC-ESI-MS.
abstract: The increasing incidence and severity of methicillin- and vancomycin-resistant infections during pregnancy prompted further development of telavancin. The understanding of the pharmacokinetics of telavancin during pregnancy is critical to optimize dosing. Due to ethical and safety concerns the study is conducted on the pregnant baboons. A method using solid-phase extraction coupled with liquid chromatography-single quadrupole mass spectrometry for the quantitative determination of telavancin in baboon plasma samples was developed and validated. Teicoplanin was used as an internal standard. Telavancin was extracted from baboon plasma samples by using Waters Oasis(®) MAX 96-Well SPE plate and achieved extraction recovery was >66% with variation <12%. Telavancin was separated on Waters Symmetry C18 column with gradient elution. Two SIM channels were monitored at m/z 823 and m/z 586 to achieve quantification with simultaneous confirmation of telavancin identification in baboon plasma samples. The linearity was assessed in the range of 0.188μg/mL to75.0μg/mL, with a correlation coefficient of 0.998. The relative standard deviation of this method was <11% for within- and between-run assays, and the accuracy ranged between 96% and 114%.
authors.affiliation: Maternal-Fetal Pharmacology and Biodevelopment Laboratories, Department of Obstetrics & Gynecology, University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX 77555-0587, USA.
authors.forename: Xiaoming
authors.initials: X
authors.lastname: Wang
authors.affiliation: Maternal-Fetal Pharmacology and Biodevelopment Laboratories, Department of Obstetrics & Gynecology, University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX 77555-0587, USA.
authors.forename: Jonathan A
authors.initials: JA
authors.lastname: Paul
authors.affiliation: Maternal-Fetal Pharmacology and Biodevelopment Laboratories, Department of Obstetrics & Gynecology, University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX 77555-0587, USA.
authors.forename: Tatiana N
authors.initials: TN
authors.lastname: Nanovskaya
authors.affiliation: Maternal-Fetal Pharmacology and Biodevelopment Laboratories, Department of Obstetrics & Gynecology, University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX 77555-0587, USA.
authors.forename: Gary D V
authors.initials: GD
authors.lastname: Hankins
authors.affiliation: Maternal-Fetal Pharmacology and Biodevelopment Laboratories, Department of Obstetrics & Gynecology, University of Texas Medical Branch at Galveston, 301 University Blvd., Galveston, TX 77555-0587, USA. Electronic address: maahmed@utmb.edu.
authors.forename: Mahmoud S
authors.initials: MS
authors.lastname: Ahmed
mesh_terms: D000617:Aminoglycosides / Q000097:blood* / Q000737:chemistry*; D000818:Animals; D002853:Chromatography, Liquid / Q000379:methods; D005260:Female; D000077427:Lipoglycopeptides; D013058:Mass Spectrometry / Q000379:methods; D010215:Papio / Q000097:blood*; D010949:Plasma / Q000737:chemistry*; D011247:Pregnancy; D052616:Solid Phase Extraction / Q000379:methods; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods; D014867:Water / Q000737:chemistry
chemical_list: D000617:Aminoglycosides; D000077427:Lipoglycopeptides; D014867:Water; C487637:telavancin
keywords: Baboon plasma; LC–ESI–MS; SPE; Telavancin