Restoration of denervated skeletal muscle transplants after reinnervation in rats

Adarsh K. Gulati

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

The present study describes reinnervation and restoration of rat skeletal muscle denervated for the duration of 3, 6 or 12 months. Denervation of extensor digitorum longus (EDL) muscle was achieved by cutting and ligating the donor rat sciatic nerve in situ. At 3, 6 and 12 months, the denervated EDL muscles were removed and transplanted into an innervated normal leg of another rat. In addition, normal (i.e., no prior denervation) muscles were transplanted as controls for comparison. The muscles were analyzed at 4 and 12 weeks after transplantation. The EDL muscle weight and myofiber size decreased with extended denervation times. After transplantation, the muscles underwent regeneration and reinnervation, and recovered as determined by an increase in muscle mass and myofiber size. The 3-month denervated muscle regenerates recovered completely, and were similar to the non-denervated normal muscle regenerates. Reinnervation, and partial recovery of muscle weight and myofiber size was observed in 6- and 12-month denervated muscle transplants. These results document that while regeneration and reinnervation does occur in denervated muscles after transplantation, the extent of recovery is related to the duration of denervation.

Original languageEnglish (US)
Pages (from-to)23-29
Number of pages7
JournalRestorative Neurology and Neuroscience
Volume2
Issue number1
DOIs
StatePublished - Jan 1 1990

    Fingerprint

Keywords

  • Denervation
  • Innervation
  • Myofiber
  • Rat
  • Regeneration
  • Skeletal muscle
  • Transplantation

ASJC Scopus subject areas

  • Neurology
  • Developmental Neuroscience
  • Clinical Neurology

Cite this