title: Simultaneous determination of GTS-21 and its metabolite in rat plasma by high-performance liquid chromatography using solid-phase extraction.
abstract: It has been suggested that GTS-21 can improve the learning deficits and inhibit the neuro-degeneration in patients with Alzheimer's disease. This paper describes a reversed-phase high-performance liquid chromatographic assay with visible detection at 405 nm for determination of GTS-21 and its metabolite, 4-hydroxy-GTS-21 in rat plasma. The method uses solid-phase extraction with a Bond Elut C18 column. A quantitation limit of 1.0 ng/ml was achieved using 0.5 ml of rat plasma. In the validation study, the coefficients of variation and the relative errors of each compound were less than 10%. Also freeze-thaw and storage stability were confirmed. This method has proved to be applicable to the pharmacokinetic study of GTS-21 in rats.
authors.affiliation: Pharmacokinetics Research Laboratory, Taiho Pharmaceutical Co., Ltd., Tokushima, Japan.
authors.forename: R
authors.initials: R
authors.lastname: Azuma
authors.forename: Y
authors.initials: Y
authors.lastname: Minami
authors.forename: T
authors.initials: T
authors.lastname: Satoh
mesh_terms: D000818:Animals; D001597:Benzylidene Compounds / Q000097:blood* / Q000493:pharmacokinetics; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D008297:Male; D018722:Nicotinic Agonists / Q000097:blood* / Q000493:pharmacokinetics; D011725:Pyridines / Q000097:blood* / Q000493:pharmacokinetics; D051381:Rats; D017207:Rats, Sprague-Dawley; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity
chemical_list: D001597:Benzylidene Compounds; D018722:Nicotinic Agonists; D011725:Pyridines; C088936:3-(2,4-dimethoxybenzylidene)anabaseine