Key result
Fibroblast-derived paracrine factors reduced cardiac conduction velocity by 52% and prolonged action potential duration by 217% in neonatal rat cardiomyocytes.
Why the study?
Do fibroblast-derived paracrine factors alter electrical propagation and ion channel expression in neonatal rat cardiomyocytes?
Population
Neonatal rat cardiac monolayers (cardiomyocytes)
Comparison
Exposure for 24 h to media conditioned by… vs Media conditioned by CFs in the presence of…
Design
Preclinical
Follow-up
24 hours
Authors
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May increase arrhythmia susceptibility via paracrine signaling; extends in vitro findings but leaves open clinical relevance in humans.
Do fibroblast-derived paracrine factors alter electrical propagation and ion channel expression in neonatal rat cardiomyocytes?
Fibroblast-derived paracrine factors alone induce significant electrophysiological changes and ion channel downregulation in cardiomyocytes, resembling pathological states associated with arrhythmias and heart failure.
Pedrotty et al. (2009) studied Cardiac fibrosis and arrhythmia. Media conditioned by cardiac fibroblasts vs. Control media was evaluated on Electrical propagation and action potential shape. Fibroblast-derived paracrine factors reduced cardiac conduction velocity by 52% and prolonged action potential duration by 217% in neonatal rat cardiomyocytes.
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