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Effect of spaceflight on the extracellular matrix of skeletal muscle after a crush injuryThe organization and composition of the extracellular matrix were studied in the crush-injured gastrocnemius muscle of rats subjected to 0 G. After 14 days of flight on Cosmos 2044, the gastrocnemius muscle was removed and evaluated by histochemical and immunohistochemical techniques from the five injured flight rodents and various earth-based treatment groups. In general, the repair process was similar in all injured muscle samples with regard to the organization of the extracellular matrix and myofibers. Small and large myofibers were present within an expanded extracellular matrix, indicative of myogenesis and muscle regeneration. In the tail-suspended animals, a more complete repair was observed with nonenlarged area of nonmuscle cells or matrix material visible. In contrast, the muscle samples from the flight animals were less well organized and contained more macrophages and blood vessels in the repair region, indicative of a delayed repair process, but did not demonstrate any chronic inflammation. Myofiber repair did vary in muscles from the different groups, being slowest in the flight animals and most complete in the tail-suspended ones.
Document ID
19920068857
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Stauber, W. T.
(NASA Ames Research Center Moffett Field, CA, United States)
Fritz, V. K.
(NASA Ames Research Center Moffett Field, CA, United States)
Burkovskaia, T. E.
(NASA Ames Research Center Moffett Field, CA, United States)
Il'ina-Kakueva, E. I.
(West Virginia, University Morgantown; Institute of Biomedical Problems, Moscow, Russia)
Date Acquired
August 15, 2013
Publication Date
August 1, 1992
Publication Information
Publication: Journal of Applied Physiology, Supplement
Volume: 73
Issue: 2 Au
ISSN: 8750-7587
Subject Category
Life Sciences (General)
Accession Number
92A51481
Funding Number(s)
CONTRACT_GRANT: NAG2-590
Distribution Limits
Public
Copyright
Other

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