Document Detail

Neuropeptide Y immunohistochemistry and ultrastructure of developing chromaffin tissue in the cloudy dogfish, Scyliorhinus torazame (Chondrichthyes, Elasmobranchii).
MedLine Citation:
PMID:  11252629     Owner:  NLM     Status:  MEDLINE    
Ontogenetic changes in neuropeptide Y-like immunoreactivity (NPY-LI) were studied in chromaffin tissue of the cloudy dogfish, Scyliorhinus torazame. In adults and post-hatching juveniles, NPY-LI was demonstrated in chromaffin cells, but not in ganglion cells and supporting cells. Immunoreactive fibers were also found in the axillary body (the major chromaffin tissue) of the adult fish. During the embryonic period, NPY-LI was found at first in chromaffin tissue in the 34-mm stage. In this stage, cells in the periphery of the tissue were positive for NPY. Afterwards, changes were not observed in the topography and relative dominance of labelled cells in the tissue. Transmission electron microscopy of chromaffin tissue of the 26-mm stage showed an early phase of histogenesis in rudimental cell clusters composed of agranular cells and a few granular cells, i.e. pheochromoblasts. In the 43-mm stage, differentiation of the chromaffin tissue enabled ultrastructural classification of adrenalin-producing cells, noradrenalin-producing cells, ganglion cells, supporting cells, and unmyelinated nerve fibers. These results suggest that in the dogfish the appearance of NPY-LI in the developing sympathoadrenal system is related to differentiation of chromaffin cells.
A Chiba
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta histochemica     Volume:  103     ISSN:  0065-1281     ISO Abbreviation:  Acta Histochem.     Publication Date:  2001 Feb 
Date Detail:
Created Date:  2001-03-16     Completed Date:  2001-05-21     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370320     Medline TA:  Acta Histochem     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  67-78     Citation Subset:  IM    
Department of Biology, Nippon Dental University School of Dentistry at Niigata, Japan.
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MeSH Terms
Adrenal Glands / cytology,  metabolism*,  ultrastructure
Chromaffin System / embryology*,  metabolism*,  ultrastructure
Microscopy, Electron / instrumentation,  methods
Neuropeptide Y / analysis,  biosynthesis*
Reg. No./Substance:
0/Neuropeptide Y

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