Key result
In porcine atria, 5-HT4 receptor activation induces positive inotropic and chronotropic responses that increase during early development and are regulated by phosphodiesterases.
Why the study?
Does 5-HT4 receptor activation improve inotropic and chronotropic responses in porcine atrial tissue?
Population
Female young pigs and newborn female pigs used for in vitro atrial tissue preparations
Comparison
In vitro administration of 5-HT4 receptor… vs Basal conditions or isoprenaline response
Design
Preclinical
Authors
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Hypothesis-generating for 5-HT4 modulation in developing atria; requires human validation before any clinical consideration.
Does 5-HT4 receptor activation improve inotropic and chronotropic responses in porcine atrial tissue?
Atrial responses to 5-HT4 receptor activation increase in the first months of life and the inotropic response is regulated by phosphodiesterases, with benzofurans acting as partial agonists compared to 5-HT.
Maeyer et al. (2005) studied Healthy (animal model). 5-HT4 receptor agonists vs. Unexposed/Vehicle was evaluated on Inotropic and chronotropic responses. In porcine atria, 5-HT4 receptor activation induces positive inotropic and chronotropic responses that increase during early development and are regulated by phosphodiesterases.
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