Document Detail


Twenty-four-hour changes in pinealocytes, capillary endothelial cells and pericapillary and intercellular spaces in the pineal gland of the mouse. Semiquantitative electron-microscopic observations.
MedLine Citation:
PMID:  2924336     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Semiquantitative electron-microscopic observations on the pineal gland of dd-mice were carried out to determine whether 24-h rhythms exist in pinealocytes, pericapillary and intercellular spaces and capillary endothelial cells. Nuclear and cytoplasmic areas of pinealocytes and the area of condensed chromatin in pinealocytes showed inversely related circadian rhythms; the former two increased, whereas the latter decreased, during the light period. The extent of pericapillary and wide intercellular spaces exhibited 24-h changes, with an increase and decrease occurring during the light period and the dark period, respectively. The cross-sectional area of endothelial cells decreased and the number of fenestrae increased during the light period; this was reversed during the dark period. The results suggest that the increase in the nuclear and cytoplasmic areas of pinealocytes, the area of pericapillary and wide intercellular spaces and the number of fenestrae, and the decrease in the area of condensed chromatin and endothelial cells during the light period may be related to an increase in synthetic activity of pinealocytes in the mouse.
Authors:
S Matsushima; Y Sakai; Y Hira
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Cell and tissue research     Volume:  255     ISSN:  0302-766X     ISO Abbreviation:  Cell Tissue Res.     Publication Date:  1989 Feb 
Date Detail:
Created Date:  1989-05-11     Completed Date:  1989-05-11     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0417625     Medline TA:  Cell Tissue Res     Country:  GERMANY, WEST    
Other Details:
Languages:  eng     Pagination:  323-32     Citation Subset:  IM    
Affiliation:
Department of Anatomy, Asahikawa Medical College, Japan.
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MeSH Terms
Descriptor/Qualifier:
Animals
Chromatin / ultrastructure
Circadian Rhythm*
Endothelium, Vascular / cytology*,  ultrastructure
Male
Mice
Mice, Inbred Strains
Microscopy, Electron
Pineal Gland / cytology*,  ultrastructure
Chemical
Reg. No./Substance:
0/Chromatin

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