Morphological features of the myenteric plexus of the stomach of the axolotl, Ambystoma mexicanum, revealed by immunocytochemistry. |
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Authors: | R Gabriel J P timmermans D Adriaensen M H A De Groodt-Lasseel and D W Scheuermann |
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Institution: | (1) Department of Zoology, Jozsef Attila University, Széged, Hungary;(2) Institute of Histology and Microscopic Anatomy, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium |
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Abstract: | Summary The general morphology of the intramural innervation of the myenteric plexus of the axolotl stomach has been investigated using antisera raised against neuron-specific enolase and a microtubule-associated protein. Additionally, the occurrence of serotonin and several peptidergic neurotransmitter/neuromodulator substances was studied.Immunoreactivity for galanin, vasoactive intestinal polypeptide, substance P and neuromedin U was found in both fibres and intrinsic perikarya, whereas the serotonin and calcitonin gene-related peptide-like-substance-containing nerve fibres seemed to be of extrinsic origin. The axolotl stomach myenteric plexus appeared to be devoid of enkephalin-, neuropeptide Y-, somatostatin-and bombesin-like immunoreactive nerve fibres and nerve cell bodies.Double labelling experiments revealed the presence of a subpopulation of substance P/calcitonin gene-related peptide-like immunoreactive nerve fibres. Contrary to mammals, no coexistence of neuromedin U and substance P was found. Our findings illustrate that besides a number of similarities, considerable species differences exist between urodeles and anurans with regard to the organization of the enteric nervous system. |
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