td-5108 has been researched along with Bradycardia* in 1 studies
1 other study(ies) available for td-5108 and Bradycardia
| Article | Year |
|---|---|
Pyrrolizidine esters and amides as 5-HT4 receptor agonists and antagonists.
A series of pyrrolizidine esters, amides, and ureas was prepared and tested for 5-HT(4) and 5-HT(3) receptor binding, 5-HT(4) receptor agonism in the rat tunica muscularis mucosae (TMM) assay, and for 5-HT(3) receptor-mediated functional antagonism in the Bezold-Jarisch reflex assay. Several pyrrolizidine derivatives were identified with high affinity for the 5-HT(4) receptor, including benzamide 12a (SC-53116), a potent and selective 5-HT(4) partial agonist that exhibits efficacy in promoting antral contractions and activity in promoting gastric emptying in canine models. Also discovered were 5-HT(4) receptor antagonists, including imidazopyridine amide 12h (SC-53606), which is a potent and selective 5-HT(4) receptor antagonist with a pA(2) value of 8.13 in the rat TMM assay. N-Methyl indole ester 13d was identified as a potent 5-HT(4) antagonist with a pA(2) value of 8.93. High selectivity was observed for these pyrrolizidine derivatives versus other monoamine receptors, including 5-HT(1), 5-HT(2), D(1), D(2), alpha(1), alpha(2), and beta receptors. Topics: Amides; Animals; Benzamides; Bradycardia; Brain; Dogs; Esophagus; Esters; Female; Gastric Emptying; Guinea Pigs; Imidazoles; In Vitro Techniques; Indoles; Male; Mice; Muscle Contraction; Muscle, Smooth; Pyloric Antrum; Pyrroles; Pyrrolizidine Alkaloids; Radioligand Assay; Rats; Rats, Wistar; Serotonin 5-HT4 Receptor Agonists; Serotonin 5-HT4 Receptor Antagonists; Structure-Activity Relationship | 2006 |