title: Simple, sensitive and rapid LC-MS/MS method for the quantitation of cerivastatin in human plasma--application to pharmacokinetic studies.
abstract: A simple and sensitive liquid chromatography-tandem mass spectrometry method was developed and validated for estimation of cerivastatin (I) in human plasma, a potent hydroxy-methylglutaryl-coenzyme A reductase inhibitor. The analyte and internal standard (atorvastatin, II) were extracted by liquid/liquid extraction with diethyl ether/dichloromethane (70/30, v/v). The chromatographic separation was performed on reverse phase Xterra ODS column with a mobile phase of water/acetonitrile (30/70, v/v) with 0.03% formic acid. The protonated analyte was quantitated in positive ionization by multiple reaction monitoring with a mass spectrometer. The mass transitions m/z 460.4 --> 356.3 and 559.2 --> 440.3 were used to measure I and II, respectively. The lower limit of quantitation was 10pg/mL with a relative standard deviation of less than 15%. Acceptable precision and accuracy were obtained for concentrations over the calibration curve ranges (0.01-10ng/mL). Sample analysis time of 2min for each sample made it possible to analyze a throughput of more than 400 human plasma samples per day. The assay can be used to analyze human plasma samples to support phase I and II clinical studies.
authors.affiliation: Biopharmaceutical Research, Suven Life Sciences Ltd., Serene Chambers, Road #7, Banjara Hills, Hyderabad 500034, India. nvsrk@suven.com
authors.forename: N V S
authors.initials: NV
authors.lastname: Ramakrishna
authors.forename: M
authors.initials: M
authors.lastname: Koteshwara
authors.forename: K N
authors.initials: KN
authors.lastname: Vishwottam
authors.forename: S
authors.initials: S
authors.lastname: Puran
authors.forename: S
authors.initials: S
authors.lastname: Manoj
authors.forename: M
authors.initials: M
authors.lastname: Santosh
mesh_terms: D002853:Chromatography, Liquid / Q000379:methods; D006801:Humans; D013058:Mass Spectrometry / Q000379:methods; D011725:Pyridines / Q000097:blood* / Q000737:chemistry / Q000493:pharmacokinetics*; D012680:Sensitivity and Specificity
chemical_list: D011725:Pyridines; C086276:cerivastatin