Relative importance of basement membrane and soluble growth factors in delayed and immediate regeneration of rat sciatic nerve

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Abstract

Sciatic nerve regeneration was studied in two groups of rats. In group I, nerves were transected and transplanted immediately to the contralateral side. In group II, nerves were transected and transplanted 30 days later to the contralateral side. At 4 weeks, group II had an average nerve action potential amplitude of 784 ± 292 µV and 43.2% ± 6.7% of myelinated fibers were >4 pm in diameter. In comparison, the respective measurements were 94 ± 35.6 ±V (p = 0.05) and 29.5% ± 1.9% (p = 0.04) in group I. At 8 weeks, there were no significant differences in these measurements between groups. These data suggest that the environment in the distal stump improves early regeneration of nerve fibers when that stump was transected 30 days earlier. These and previous findings suggest that soluble trophic factors may be important in initiation of axonal regeneration.

Original languageEnglish (US)
Pages (from-to)216-222
Number of pages7
JournalJournal of Neuropathology and Experimental Neurology
Volume52
Issue number3
DOIs
StatePublished - May 1993

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Keywords

  • Delayed reconnection
  • Nerve growth factor
  • Nerve regeneration
  • Neurite promoting factor
  • Peripheral nerve
  • Trophic factor

ASJC Scopus subject areas

  • Pathology and Forensic Medicine
  • Neurology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience

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