NDLI: GSK962040: a small molecule motilin receptor agonist which increases gastrointestinal motility in conscious dogs.

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GSK962040: a small molecule motilin receptor agonist which increases gastrointestinal motility in conscious dogs.

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GSK962040: a small molecule motilin receptor agonist which increases gastrointestinal motility in conscious dogs.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Leming, S. Broad, J. Cozens, S. J. Otterson, M. Winchester, W. Lee, K. Dukes, G. E. Sanger, G. J.
Description	Country affiliation: United States Author Affiliation: Leming S ( Zablocki VAMC, Wisconsin Corporation for Biomedical Research, Milwaukee, WI, USA.)
Abstract	BACKGROUND: GSK962040, a small molecule motilin receptor agonist, was identified to address the need for a safe, efficacious gastric prokinetic agent. However, as laboratory rodents lack a functional motilin system, studies in vivo have been limited to a single dose, which increased defecation in rabbits. Motilin agonists do not usually increase human colonic motility, so gastric prokinetic activity needs to be demonstrated. METHODS: The effect of intravenous GSK962040 on gastro-duodenal motility was assessed in fasted dogs implanted with strain gauges. Activity was correlated with blood plasma concentrations of GSK962040 (measured by HPLC-MS/MS) and potency of GSK962040 at the dog recombinant receptor [using a Fluorometric Imaging Plate Reader (Molecular Devices, Wokingham, UK) after expression in HEK293 cells]. KEY RESULTS: GSK962040 activated the dog motilin receptor (pEC(50) 5.79; intrinsic activity 0.72, compared with [Nle(13) ]-motilin). In vivo, GSK962040 induced phasic contractions, the duration of which was dose-related (48 and 173 min for 3 and 6 mg kg(-1) ), driven by mean plasma concentrations >1.14 µmol L(-1) . After the effects of GSK962040 faded, migrating motor complex (MMC) activity returned. Migrating motor complex restoration was unaffected by 3 mg kg(-1) GSK962040 but at 6 mg kg(-1) , MMCs returned 253 min after dosing, compared with 101 min after saline (n=5 each). CONCLUSIONS & INFERENCES: The results are consistent with lower potency for agonists at the dog motilin receptor, compared with humans. They also define the doses of GSK962040 which stimulate gastric motility. Correlation of in vivo and in vitro data in the same species, together with plasma concentrations, guides further studies and translation to other species.
File Format	HTM / HTML
ISSN	13501925
Issue Number	10
Volume Number	23
e-ISSN	13652982
Journal	Neurogastroenterology & Motility
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2011-10-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Neurogastroenterology Gastrointestinal Motility Drug Effects Piperazines Pharmacology Piperidines Receptors, Gastrointestinal Hormone Agonists Receptors, Neuropeptide Animals Consciousness Dogs Hek293 Cells Humans Male Transfection Journal Article Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Physiology Endocrine and Autonomic Systems Gastroenterology

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