The epicardium as modulator of the cardiac autonomic response during early development

Journal of Molecular and Cellular Cardiology
Tim P KelderMonique Jongbloed

Abstract

The cardiac autonomic nervous system (cANS) modulates heart rate, contraction force and conduction velocity. The embryonic chicken heart already responds to epinephrine prior to establishment of the cANS. The aim of this study was to define the regions of the heart that might participate in modulating the early autonomic response to epinephrine. Immunofluorescence analysis reveals expression of neural markers tubulin beta-3 chain and neural cell adhesion molecule in the epicardium during early development. In addition, expression of the β2 adrenergic receptor, the receptor for epinephrine, was found in the epicardium. Ex-ovo micro-electrode recordings in hearts with inhibition of epicardial outgrowth showed a significantly reduced response of the heart rate to epinephrine compared to control hearts. This study suggests a role for the epicardium as autonomic modulator during early cardiac development.

References

Feb 10, 2016·Differentiation; Research in Biological Diversity·Tim P KelderMonique R M Jongbloed
Aug 29, 2018·Developmental Dynamics : an Official Publication of the American Association of Anatomists·Rebecca Vicente SteijnOndrej Nanka
Sep 12, 2016·Journal of Cardiovascular Development and Disease·Anna M D VéghMonique R M Jongbloed

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Related Concepts

Autonomic Nervous System Disorders
Biological Markers
Food, Canned
Embryo
Study
Entire Autonomic Nervous System
Immunofluorescence Assay
TUBE1 gene
Neurons
Structure of Parietal Pericardium

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