Structure-activity relationship studies of phenoxypropanolamine derivatives for beta 3-adrenergic activity.
In this study, some compounds of phenoxypropanolamine (SWR-0342SA) derivatives were found to possess beta 3-adrenoceptor (beta 3-AR) agonistic activity. Addition and deletion of the substituents on phenoxyacetate, chain length variation between two aromatic rings, conversion of phenoxypropanolamine to phenylethanolamine, insertion of double bonds and another ether group in the side chain between two phenyl rings in SWR-0342SA derivatives resulted in novel phenoxypropanolamine and phenylethanolamine compounds. This study was performed to evaluate the structural modification of the parent SWR-0342SA and their effects on the binding affinities as well as functional activities of these derivatives using COS-7 cells and CHO cells expressing human beta 1, beta 2, beta 3-AR and only beta 3-AR respectively. Compounds SWR-0342SA, SWR-0339SA (S-enantiomer with trans-ethylidene group), SWR-0315NA (non-isomeric with racemic ethylidene group and sodium salt), and SWR-0334NA (non-isomeric with trans-ethylidene group and sodium salt), all belonging to phenoxypropanolamine group, were found to have high binding and functional activities and were supposed to be potent beta 3-AR agonists. Since many of the phenoxypropanolamine compounds acts as antagonists to beta 1- and beta 2-ARs, these derivatives have also been evaluated for their affinity to beta 1- and beta 2-ARs. The pKi values of these derivatives to beta-AR subtypes were also compared. These compounds show little selectivities towards beta 3-AR subtypes.
Ahmed
Maruf
M
Department of Pharmacology, School of Pharmacy, Niigata University of Pharmacy and Applied Life Sciences, 5-13-2 Kamishinei-cho, Niigata 950-2081, Japan.
Hanaoka
Yoko
Y
Nagatomo
Takafumi
T
D000085:Acetates / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology*; D058671:Adrenergic beta-1 Receptor Antagonists; D058672:Adrenergic beta-2 Receptor Antagonists; D058667:Adrenergic beta-3 Receptor Agonists; D000818:Animals; D016466:CHO Cells / Q000378:metabolism; D019556:COS Cells; D002478:Cells, Cultured; D006224:Cricetinae; D006801:Humans; D011485:Protein Binding; D011869:Radioligand Assay; D018342:Receptors, Adrenergic, beta-1 / Q000378:metabolism; D018343:Receptors, Adrenergic, beta-2 / Q000378:metabolism; D022702:Receptors, Adrenergic, beta-3 / Q000378:metabolism; D013329:Structure-Activity Relationship
D000085:Acetates; D058671:Adrenergic beta-1 Receptor Antagonists; D058672:Adrenergic beta-2 Receptor Antagonists; D058667:Adrenergic beta-3 Receptor Agonists; D018342:Receptors, Adrenergic, beta-1; D018343:Receptors, Adrenergic, beta-2; D022702:Receptors, Adrenergic, beta-3; C401286:SWR 0342SA