Document Detail


The effects of post-mortem changes and calcium depletion on the ultrastructure of myocardial cells in a teleost.
MedLine Citation:
PMID:  6542327     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effects of post-mortem changes and calcium depletion on the ultrastructure of myocardial cells in a teleost, Gadus virens L., are described. When incubated at 4 degrees C in cacodylate buffer/Ringer's solution for 8 h some few myocardial cells appear swollen and their mitochondria contain several small (50-250 nm) flocculent densities. In tissue incubated for at least 80 h the mitochondria in all myocardial cells contain a number of such densities. Also, the size of these structures seems to increase with incubation time. Further, after being incubated for at least 150 h the myofibrils appear often twisted and broken, and the electron density of the Z and I bands gradually declines. At prolonged incubation times (about 1,000-1,300 h) the actin filaments and Z band material seem gradually to dissolve, whereas the myosin filaments still make up a distinct A band. Intercalated discs in tissue incubated in calcium-free medium for 4-28 h appear to display a nearly normal structure. The results of the present study are compared with those previously reported for mammals. The observed differences in decomposition rates within teleostean myocardial tissue are discussed.
Authors:
I L Leknes
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Anatomischer Anzeiger     Volume:  157     ISSN:  0003-2786     ISO Abbreviation:  Anat Anz     Publication Date:  1984  
Date Detail:
Created Date:  1985-01-22     Completed Date:  1985-01-22     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  0370541     Medline TA:  Anat Anz     Country:  GERMANY, EAST    
Other Details:
Languages:  eng     Pagination:  221-5     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Calcium* / metabolism
Cytoskeleton / ultrastructure
Fishes / anatomy & histology*
Heart Ventricles
Microscopy, Electron
Mitochondria, Heart / ultrastructure
Myocardium / ultrastructure*
Myofibrils / ultrastructure
Postmortem Changes*
Chemical
Reg. No./Substance:
7440-70-2/Calcium

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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