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Evidence for an esophageal origin of VIP-IR and NO synthase-IR nerves innervating the guinea pig trachealis: A retrograde neuronal tracing and immunohistochemical analysis by Fischer, Axel; Canning, Brendan J.; Undem, Bradley J.; Kummer, Wolfgang is a Neuroscience article available to read on EtoBox.

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Nonadrenergic noncholinergic (NANC) relaxations of the guinea pig trachea are thought to be mediated by vasoactive intestinal peptide (VIP) and nitric oxide (NO). Physiological studies have indicated that the parasympathetic ganglion neurons mediating NANC relaxations of the guinea pig trachea but not the ganglion neurons mediating cholinergic contractions are in some way associated with the adjacent esophagus. In the present study, we attempted to locate precisely the noncholinergic parasympathetic ganglia innervating the trachealis. Two days after injection of the retrograde neuronal tracer DiI into the trachealis of organotypic cultures of the guinea pig trachea and esophagus, neurons within the myenteric plexus of the esophagus or closely associated with the outer striated longitudinal muscle layers of the esophagus were labeled. Subsequent immunohistochemical analyses revealed that a majority of the retrogradely labeled neurons possessed VIP immunoreactivity (IR) or NO synthase (NOS)-IR or had VIP-IR nerve fibers associated with their cell bodies. By contrast, no labeling of esophageal neurons was seen when the tissue between the trachea and esophagus had been disrupted by blu

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Author

Fischer, Axel; Canning, Brendan J.; Undem, Bradley J.; Kummer, Wolfgang

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley; Research Square (ISSN 0021-9967)

Published

1998

Language

EN

Field

Neuroscience (Life Sciences)