Article (Scientific journals)
Release of calcitonin gene-related peptide from the jugular--nodose ganglion complex in rats--A new model to examine the role of cardiac peptidergic and nitrergic innervation
Strecker, Thomas; Koulchitsky, Stanislav; Dieterle, Anne et al.
2008In Neuropeptides, 42 (5), p. 543-550
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Keywords :
vagus; heart; brainstem; CGRP; nitric oxide
Abstract :
[en] Objective: Afferent information from the heart and the lung is conveyed to the brainstem by primary afferent fibers originating from vagal sensory neurons (jugular–nodose ganglion complex, JNC). The present study was made to evaluate if release of the sensory neuropeptide calcitonin gene-related peptide (CGRP) from the JNC can be used as a model for future studies on changes in neuropeptide release under pathological conditions of the heart. Methods: Freshly isolated rat JNC’s were passed through a series of solutions based on oxygenated synthetic interstitial fluid (SIF). Substances such as the TRPV1 receptor agonist capsaicin and the nitric oxide (NO) donor sodium nitroprusside (SNP) were added as excitatory test stimuli. The eluates were processed using an enzyme immuno-assay (EIA) for measurement of CGRP concentrations. Immunohistochemistry was used to visualize CGRP containing and NO producing neurons in the JNC. Results: Both SNP and capsaicin caused significant increases in CGRP release. CGRP-immunoreactive neurons (somata) were preferentially found in the jugular ganglion, whereas neurons immunoreactive for neuronal NO synthase were mostly localized in the nodose ganglion. Conclusion: The present study demonstrates an easily reproducible model for measuring stimulated CGRP release from vagal afferents arising from the JNC. Nitric oxide produced by vagal afferents may stimulate CGRP release upon afferent activation.
Disciplines :
Anatomy (cytology, histology, embryology...) & physiology
Author, co-author :
Strecker, Thomas
Koulchitsky, Stanislav ;  Université de Liège > Département des sciences biomédicales et précliniques > Pharmacologie
Dieterle, Anne
Neuhuber, Winfried L.
Weyand, Michael
Messlinger, Karl
Language :
English
Title :
Release of calcitonin gene-related peptide from the jugular--nodose ganglion complex in rats--A new model to examine the role of cardiac peptidergic and nitrergic innervation
Publication date :
2008
Journal title :
Neuropeptides
ISSN :
0143-4179
Publisher :
Elsevier
Volume :
42
Issue :
5
Pages :
543-550
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 02 August 2017

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