title: Drug-human serum albumin binding studied by capillary electrophoresis with electrochemiluminescence detection.
abstract: A new technique for investigating drug-protein binding was developed employing capillary electrophoresis (CE) coupled with tris(2,2'-bipyridyl) ruthenium(II) [Ru(bpy)(3) (2+)] electrochemiluminescence (ECL) (CE-ECL) detection after equilibrium dialysis. Three basic drugs, namely pridinol, procyclidine and its analogue trihexyphenidyl, were successfully separated by capillary zone electrophoresis with end-column Ru(bpy)(3) (2+) ECL detection. The relative drug binding to human serum albumin (HSA) for each single drug as well as for the three drugs binding simultaneously was calculated. It was found that the three antiparkinsonian drugs compete for the same binding site on HSA. This work demonstrated that Ru(bpy)(3) (2+) CE-ECL can be a suitable technique for studying drug-protein binding.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China.
authors.forename: Xiaocui
authors.initials: X
authors.lastname: Zhao
authors.forename: Tianyan
authors.initials: T
authors.lastname: You
authors.forename: Jifeng
authors.initials: J
authors.lastname: Liu
authors.forename: Xiuhua
authors.initials: X
authors.lastname: Sun
authors.forename: Jilin
authors.initials: J
authors.lastname: Yan
authors.forename: Xiurong
authors.initials: X
authors.lastname: Yang
authors.forename: Erkang
authors.initials: E
authors.lastname: Wang
mesh_terms: D000978:Antiparkinson Agents / Q000032:analysis* / Q000378:metabolism; D001667:Binding, Competitive; D019075:Electrophoresis, Capillary / Q000379:methods*; D006801:Humans; D008163:Luminescent Measurements / Q000379:methods*; D009942:Organometallic Compounds / Q000032:analysis / Q000737:chemistry; D010880:Piperidines / Q000032:analysis / Q000378:metabolism; D011352:Procyclidine / Q000032:analysis / Q000378:metabolism; D011485:Protein Binding; D012709:Serum Albumin / Q000737:chemistry / Q000378:metabolism*; D014282:Trihexyphenidyl / Q000032:analysis / Q000378:metabolism
chemical_list: D000978:Antiparkinson Agents; D009942:Organometallic Compounds; D010880:Piperidines; D012709:Serum Albumin; C415768:tris(2,2'-bipyridyl)ruthenium(II); D014282:Trihexyphenidyl; C009185:pridinol; D011352:Procyclidine