title: Determination of a novel sigma receptor antagonist, DuP 734, in rat plasma by reversed-phase high-performance liquid chromatography with ultraviolet detection.
abstract: A selective high-performance liquid chromatographic (HPLC) assay for a sigma receptor antagonist, DuP 734 (I), in rat plasma has been developed. Compound I and internal standard, XC031 (I.S.), were first extracted from plasma into an ethyl acetate-toluene mixture (3:7, v/v) and then back-extracted into freshly prepared phosphoric acid (0.03 M). Separation of I and I.S. with no interference from endogenous substances was achieved on a reversed-phase octyl column and detection was by UV at 229 nm. The mobile phase consisted of acetonitrile-glacial acetic acid-triethylamine-0.05 M ammonium acetate (670:4:2:2000, v/v). Using 0.5 ml of rat plasma for extraction, the limit of quantitation was 43 ng/ml and the assay was linear from 43 to 8536 ng/ml. The intra- and inter-day coefficients of variation ranged from 0.7 to 3.0%, and from 1.4 to 14.5%, respectively, over the entire concentration range. The accuracy was within 16.1% of the spiked concentrations. I was stable in frozen plasma at -20 degrees C for at least 68 days.
authors.affiliation: Drug Metabolism and Pharmacokinetics Section, Stine-Haskell Research Center, DuPont Merck Pharmaceutical Company, Newark, DE 19714.
authors.forename: R P
authors.initials: RP
authors.lastname: Kapil
authors.forename: W
authors.initials: W
authors.lastname: Lee
authors.forename: N Y
authors.initials: NY
authors.lastname: Wong
authors.forename: P L
authors.initials: PL
authors.lastname: Saxton
authors.forename: G N
authors.initials: GN
authors.lastname: Lam
mesh_terms: D000818:Animals; D014150:Antipsychotic Agents / Q000097:blood* / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008297:Male; D015394:Molecular Structure; D010880:Piperidines / Q000097:blood* / Q000493:pharmacokinetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D017480:Receptors, sigma / Q000037:antagonists & inhibitors*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
chemical_list: D014150:Antipsychotic Agents; D010880:Piperidines; D017480:Receptors, sigma; C078773:DuP 734