title: Determination of MS-275, a novel histone deacetylase inhibitor, in human plasma by liquid chromatography-electrospray mass spectrometry.
abstract: A rapid method was developed for the quantitative determination of the novel histone deacetylase inhibitor, MS-275, in human plasma. Calibration curves were constructed in the range of 1-100 ng/ml, and were analyzed using a weight factor proportional to the nominal concentration. Sample pretreatment involved a one-step protein precipitation with acetonitrile of 0.1 ml samples. The analysis was performed on a column (75 mm x 4.6 mm i.d.) packed with 3.5 microm Phenyl-SB material, using methanol-10mM ammonium formate (55:45 (v/v)) as the mobile phase. The column effluent was monitored by mass spectrometry with positive electrospray ionization. The values for precision and accuracy were always < or =5.58 and <11.4% relative error, respectively. The method was successfully applied to examine the pharmacokinetics of MS-275 in a cancer patient.
authors.affiliation: Clinical Pharmacology Research Core, Medical Oncology Clinical Research Unit, Center for Cancer Research, National Cancer Institute, National Institutes of Health, 9000 Rockville Pike, Building 10, Room 5A01, Bethesda, MD 20892, USA.
authors.forename: Kyunghwa
authors.initials: K
authors.lastname: Hwang
authors.forename: Milin R
authors.initials: MR
authors.lastname: Acharya
authors.forename: Edward A
authors.initials: EA
authors.lastname: Sausville
authors.forename: Suoping
authors.initials: S
authors.lastname: Zhai
authors.forename: Eunhee W
authors.initials: EW
authors.lastname: Woo
authors.forename: Jürgen
authors.initials: J
authors.lastname: Venitz
authors.forename: William D
authors.initials: WD
authors.lastname: Figg
authors.forename: Alex
authors.initials: A
authors.lastname: Sparreboom
mesh_terms: D000284:Administration, Oral; D001549:Benzamides / Q000008:administration & dosage / Q000097:blood* / Q000493:pharmacokinetics; D002853:Chromatography, Liquid / Q000379:methods*; D004791:Enzyme Inhibitors / Q000008:administration & dosage / Q000097:blood* / Q000493:pharmacokinetics; D056572:Histone Deacetylase Inhibitors; D006801:Humans; D011725:Pyridines / Q000008:administration & dosage / Q000097:blood* / Q000493:pharmacokinetics; D015203:Reproducibility of Results; D021241:Spectrometry, Mass, Electrospray Ionization / Q000379:methods*
chemical_list: D001549:Benzamides; D004791:Enzyme Inhibitors; D056572:Histone Deacetylase Inhibitors; D011725:Pyridines; C118739:entinostat