title: Determination of temozolomide in serum and brain tumor with micellar electrokinetic capillary chromatography.
abstract: Micellar electrokinetic capillary chromatographic (MEKC) with photodiode-array detection was applied to determine temozolomide (TMZ) in human serum and brain tumor. The limit of quantitation (LOQ) was 0.096 μg/mL using 325 nm as detection wavelength. The method made possible that the TMZ could be detected in in vivo serum samples without sample pretreatment. In order to detect TMZ at lower concentration, an extraction with ethyl acetate was applied to preconcentrate the analyte. Small amount of brain tumor tissues (less than 1g) were lyophilized and pretreated using extraction as a clean up and concentrating step. After removing the organic solvent a final sample volume of only 10 μL was analyzed. The obtained peak concentrations (8.2-10.1 μg/mL) and T(max) (44-65 min) of TMZ in serum were similar to the data reported by others, the in vivo TMZ concentrations found in brain tumor ranged between 0.061 and 0.117 μg/g.
authors: Department of Inorganic and Analytical Chemistry, University of Debrecen, H-4010 Debrecen, POB 21, Hungary.
authors: Melinda
authors: M
authors: Andrási
authors: Brigitta
authors: B
authors: Törzsök
authors: Álmos
authors: Á
authors: Klekner
authors: Attila
authors: A
authors: Gáspár
mesh_terms: D000970:Antineoplastic Agents / Q000032:analysis* / Q000097:blood; D001923:Brain Chemistry; D001932:Brain Neoplasms / Q000737:chemistry* / Q000188:drug therapy; D020374:Chromatography, Micellar Electrokinetic Capillary / Q000379:methods*; D003606:Dacarbazine / Q000031:analogs & derivatives* / Q000032:analysis / Q000097:blood; D006801:Humans; D000077204:Temozolomide
chemical_list: D000970:Antineoplastic Agents; D003606:Dacarbazine; D000077204:Temozolomide