title: Computer-aided design, synthesis and biological assay of p-methylsulfonamido phenylethylamine analogues.
abstract: Class III antiarrhythmic agents selectively delay the effective refractory period (ERP) and increase the transmembrance action potential duration (APD). Based on our previous studies, a set of 17 methylsulfonamido phenylethylamine analogues were investigated by 3D-QSAR techniques of CoMFA and CoMSIA. The 3D-QSAR models proved a good predictive ability, and could describe the steric, electrostatic and hydrophobic requirements for recognition forces of the receptor site. According to the clues provided by this 3D-QSAR analysis, we designed and synthesized a series of new analogues of methanesulfonamido phenylethylamine (VIa-i). Pharmacological assay indicated that the effective concentrations of delaying the functional refractory period (FRP) 10ms of these new compounds have a good correlation with the 3D-QSAR predicted values. It is remarkable that the maximal percent change of delaying FRP in microM of compound VIc is much higher than that of dofetilide. The results showed that the 3D-QSAR models are reliable.
authors.affiliation: Shanghai Institute of Materia Medica, Chinese Academy of Sciences, China.
authors.forename: H
authors.initials: H
authors.lastname: Liu
authors.forename: M
authors.initials: M
authors.lastname: Ji
authors.forename: H
authors.initials: H
authors.lastname: Jiang
authors.forename: L
authors.initials: L
authors.lastname: Liu
authors.forename: W
authors.initials: W
authors.lastname: Hua
authors.forename: K
authors.initials: K
authors.lastname: Chen
authors.forename: R
authors.initials: R
authors.lastname: Ji
mesh_terms: D000818:Animals; D000889:Anti-Arrhythmia Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D003198:Computer Simulation; D015195:Drug Design; D006325:Heart Atria / Q000187:drug effects; D066298:In Vitro Techniques; D015394:Molecular Structure; D010627:Phenethylamines / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D026902:Potassium Channel Blockers; D015221:Potassium Channels / Q000378:metabolism; D021281:Quantitative Structure-Activity Relationship; D013449:Sulfonamides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*
chemical_list: D000889:Anti-Arrhythmia Agents; D010627:Phenethylamines; D026902:Potassium Channel Blockers; D015221:Potassium Channels; D013449:Sulfonamides