Morphometric ultrastructural evaluation of satellite cells in musculus gastrocnemius and musculus latissimus dorsi anterior of rats subjected to 7 day hypokinesia.
The investigations were undertaken to evaluate morphometrically the satellite cells (SC) of two muscles: the slow, musclus latissimus dorsi and the fast, musculus gastrocnemius from rats kept in hypokinetic conditions for seven days. The changes in both muscle were of similar character, they concerned a decrease in the Golgi apparatus, rough endoplasmic reticulum fractions and the number of ribosomes, and an increase in the relative volume of heterochromatin content. These findings seem to indicate a reduced activity of the SC. Differences were also demonstrated between the satellite cells in both examined muscles in the control group. They also suggest that the SC are not a homogeneous population as regards parameters evaluated in the present study.
Department of Electron Microscopy, Institute of Biostructure, University Medical Academy, Warsaw.
E
E
Jankowska
W
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Barańska
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W
Baran
D000818:Animals; D018476:Hypokinesia; D007103:Immobilization; D008297:Male; D018482:Muscle, Skeletal / Q000166:cytology / Q000502:physiology* / Q000648:ultrastructure*; D015388:Organelles / Q000502:physiology / Q000648:ultrastructure; D051381:Rats; D017208:Rats, Wistar