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. 1994 Dec;26(12):916-28.

The expression of vimentin in satellite cells of regenerating skeletal muscle in vivo

R Vater  1 , M J Cullen, J B Harris
Affiliations
  • PMID: 7896567

The expression of vimentin in satellite cells of regenerating skeletal muscle in vivo

R Vater et al. Histochem J. 1994 Dec.

Abstract

The expression of the intermediate filament protein, vimentin, was studied in skeletal muscle during a cycle of degeneration and regeneration. Venom from the Australian tiger snake, Notechis scutatus scutatus, was used to initiate the breakdown of the soleus muscle of young, mature rats in vivo. Cryosections and Western blots of muscle samples were labelled using antibodies to vimentin, and examined at fixed time points after venom injection. Vimentin was absent in control adult muscle fibres, but was identified in activated satellite cells 12 h after venom assault. The amount of this protein rose during the early stages of regeneration, reaching its peak at 2-3 days. At this time, the expression of muscle-specific intermediate filament protein, desmin, began. As the abundance of desmin increased with the maturation of the regenerating myofibres, the abundance of vimentin declined until it was no longer detectable in mature regenerated fibres. It is suggested that vimentin plays an important role during satellite cell activation in the early stages of regeneration, and that the expression of vimentin may act as a stimulus for the expression of desmin at later stages of regeneration.

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