Abstract |
Since metoclopramide was first described (in 1964) there have been several attempts to develop compounds which retained gastrointestinal prokinetic activity (via 5-HT(4) receptor activation) but without the limiting side effects associated with dopamine D(2) receptor antagonism. Early compounds ( mosapride, cisapride, renzapride, tegaserod) were identified before several of the 5-HT receptors were even described (including 5-HT(4) and 5-HT(2B)), whereas prucalopride came later. Several compounds were hampered by non-selectivity, introducing cardiac liability ( cisapride: activity at human Ether-a-go-go Related Gene) or potentially, a reduced intestinal prokinetic activity caused by activity at a second 5-HT receptor ( renzapride: antagonism at the 5-HT(3) receptor; tegaserod: antagonism at the 5-HT(2B) receptor). Poor intrinsic activity at gastrointestinal 5-HT(4) receptors has also been an issue ( mosapride, tegaserod). Perhaps prucalopride has now achieved the profile of good selectivity of action and high intrinsic activity at intestinal 5-HT(4) receptors, without clinically-meaningful actions on 5-HT(4) receptors in the heart. The progress of this compound for treatment of chronic constipation, as well as competitor molecules such as ATI-7505 and TD-5108, will now be followed with interest as each attempts to differentiate themselves from each other. Perhaps at last, 5-HT(4) receptor agonists are being given the chance to show what they can do.
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Authors | G J Sanger |
Journal | Neurogastroenterology and motility : the official journal of the European Gastrointestinal Motility Society
(Neurogastroenterol Motil)
Vol. 21
Issue 12
Pg. 1235-8
(Dec 2009)
ISSN: 1365-2982 [Electronic] England |
PMID | 19906028
(Publication Type: Journal Article, Review)
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Chemical References |
- Benzofurans
- Dopamine Antagonists
- Receptors, G-Protein-Coupled
- Serotonin 5-HT4 Receptor Agonists
- Serotonin Receptor Agonists
- prucalopride
- Receptors, Serotonin, 5-HT4
- Metoclopramide
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Topics |
- Aged
- Animals
- Benzofurans
(adverse effects, pharmacology, therapeutic use)
- Dopamine Antagonists
(pharmacology, therapeutic use)
- Gastrointestinal Diseases
(drug therapy, physiopathology)
- Gastrointestinal Motility
(drug effects)
- Humans
- Metoclopramide
(pharmacology, therapeutic use)
- Receptors, G-Protein-Coupled
(drug effects)
- Receptors, Serotonin, 5-HT4
(drug effects)
- Serotonin 5-HT4 Receptor Agonists
- Serotonin Receptor Agonists
(adverse effects, pharmacology, therapeutic use)
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