Fading of 5-HT4 receptor-mediated inotropic responses to 5-hydroxytryptamine is caused by phosphodiesterase activity in porcine atrium
- PMID: 16331292
- PMCID: PMC1615854
- DOI: 10.1038/sj.bjp.0706501
Fading of 5-HT4 receptor-mediated inotropic responses to 5-hydroxytryptamine is caused by phosphodiesterase activity in porcine atrium
Abstract
Inotropic responses to 5-hydroxytryptamine (5-HT) in human and porcine atrium can fade, suggesting 5-HT(4) receptor desensitization. De Maeyer et al., however, show in this issue that inhibition of phosphodiesterases with isobutyl-methyl-xanthine prevents fading of 5-HT(4) receptor-mediated responses to 5-HT and the partial agonist prucalopride in porcine atrium.
Comment on
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Porcine left atrial and sinoatrial 5-HT(4) receptor-induced responses: fading of the response and influence of development.Br J Pharmacol. 2006 Jan;147(2):140-57. doi: 10.1038/sj.bjp.0706497. Br J Pharmacol. 2006. PMID: 16331294 Free PMC article.
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