Document Detail

Plasticity of secretory neurons in the supraoptic and paraventricular nuclei of the hypothalamus on exposure to light.
MedLine Citation:
PMID:  16645758     Owner:  NLM     Status:  MEDLINE    
Light and electron microscopic methods were used to analyze changes in secretory neurons in the supraoptic (SON) and paraventricular (PVN) nuclei in the hypothalamus in 100 adult male rats at time points from the first minutes to 180 days after 48 hours of full-time exposure to bright light. At the early time points after exposure, the cellular formulae of the SON and PVN shifted towards functionally active neurons with minimal quantities of secretory granules, large nuclei and nucleoli, low RNA contents, small numbers of rough endoplasmic reticulum cisterns, vacuoles, and lysosomes in the perikarya. The number of cells depositing secretion was greater than in controls at 24 h in the SON and PVN and at 10 days in the SON. Normalization of the cellular formula and the structural organization of the protein-synthesizing apparatus of PVN neurons occurred at 10-30 days, with normalization in the SON at 30-180 days. These data provide evidence that the range of plasticity of neurons in the PVN on exposure to full-time bright light was more significant than that in the SON.
S V Logvinov; A V Gerasimov; V P Kostyuchenko
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Neuroscience and behavioral physiology     Volume:  36     ISSN:  0097-0549     ISO Abbreviation:  Neurosci. Behav. Physiol.     Publication Date:  2006 Jun 
Date Detail:
Created Date:  2006-04-28     Completed Date:  2006-08-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0330471     Medline TA:  Neurosci Behav Physiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  463-6     Citation Subset:  IM    
Department of Histology, Embryology, and Cytology, Siberian State Medical University, Tomsk.
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MeSH Terms
Adaptation, Physiological
Cytoplasmic Granules / ultrastructure
Endoplasmic Reticulum / ultrastructure
Golgi Apparatus / ultrastructure
Neuronal Plasticity / physiology*,  radiation effects
Neurons / radiation effects,  ultrastructure*
Neurosecretory Systems / physiology,  radiation effects,  ultrastructure*
Paraventricular Hypothalamic Nucleus / radiation effects,  secretion,  ultrastructure*
Supraoptic Nucleus / radiation effects,  secretion,  ultrastructure*
Vasopressins / radiation effects,  secretion
Reg. No./Substance:

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