Chemical Name:1-methyl-1H-indole-3-carboxylic acid,
[1-[2-[(methylsulfonyl)amino]ethyl]-4-piperidinyl]methy
l ester
Biological Activity:
Potent, selective 5-HT4 receptor antagonist (pKB
= 9.43 in human colonic muscle, and Kd = 0.15 nMfor binding to cloned human 5-HT4
receptors). Displays > 300-fold selectivity over 5-HT1A, 5-HT1B,
5-HT2A, 5-HT2C and 5-HT3 receptors.
Gale et al (1994) GR113808: a novel, selective antagonist with high affinity
at the 5-HT4 receptor. Br.J.Pharmacol. 111 332. Eglenet al (1995) Central 5-HT4 receptors. TiPS 16
391. Van den Wyngaertet al (1997) Cloning and expression of a
human serotonin 5-HT4 receptor cDNA. J.Neurochem. 69
1810. Prinset al (2000) An improved in vitro bioassay for
the study of 5-HT4 receptors in the human isolated large intestinal
circular muscle. Br.J.Pharmacol. 129 1601.
Dual serotonin / noradrenaline reuptake inhibitor that displays ~ 30-fold higher affinity for SERT than NET (Ki values are 82 and 2480 nM respectively). Anti-depressant; increases swimming and climbing behaviour in the forced-swim test in rats.