Abstract:
:In three species of teleosts - carp Cyprinus carpio; grass carp Ctenopharyngodon idella; and crucian carp Carassius auratus - the caudal neurosecretory system displays small, medium-sized and large neurons. Urotensin I (UI)-immunoreactive and UI-nonreactive neurons were found in all three groups; in general, the number of the latter neurons exceeded that of the former. Noteworthy are: (i) UI-immunoreactive fibers in the caudal spinal cord and (ii) dense accumulations of UI-immunoreactive product around the capillaries of the urophysis. In two species of elasmobranchs-cat shark Heterodontus japonicus and swell shark Cephaloscyllium umbratile - neurosecretory neurons decreased in size in rostro-caudal direction. Most of the neurosecretory perikarya, their axons and the corresponding neurohemal areas were UI-immunoreactive, but a small number of secretory neurons was devoid of immunoreaction. Oxytocin, arginine vasopressin, substance P, somatostatin, neurotensin, vasoactive intestinal polypeptide and gastrin-releasing peptide were not detected in the caudal neurosecretory system of the carp.
journal_name
Cell Tissue Resjournal_title
Cell and tissue researchauthors
Yamada C,Yamada S,Ichikawa T,Kobayashi Hdoi
10.1007/BF00212550subject
Has Abstractpub_date
1986-01-01 00:00:00pages
687-90issue
3eissn
0302-766Xissn
1432-0878journal_volume
244pub_type
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