Differential regulation of fibroblast growth factor (FGF)-2 and FGF receptor 1 mRNAs and FGF-2 isoforms in spinal ganglia and sciatic nerve after peripheral nerve lesion

J Neurochem. 1997 Mar;68(3):1150-8. doi: 10.1046/j.1471-4159.1997.68031150.x.

Abstract

To study the functional role of endogenous basic fibroblast growth factor-2 (FGF-2) during degeneration and regeneration of the sensory system, we have determined the expression and regulation of FGF-2 and FGF receptor (FGFR)-1 mRNAs in spinal ganglia and sciatic nerve during experimental transection and crush injury of the sciatic nerve. In contrast to levels of the FGFR-1 transcript, which is not altered, the level of FGF-2 mRNA is dramatically up-regulated in spinal ganglia after injury. In the proximal and distal nerve stumps both transcript levels are significantly elevated, albeit at different time points. The FGF-2 isoforms are differently up-regulated in spinal ganglia and sciatic nerve following peripheral nerve lesion. The differential response of FGF-2 mRNA and protein and of FGFR-1 mRNA in spinal ganglia and sciatic nerve after lesion is suggestive of different physiological functions: a local reaction at the lesion site where axonal regrowth occurs and a trophic reaction for the degenerating/regenerating sensory neurons.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Female
  • Fibroblast Growth Factor 2 / genetics*
  • Ganglia, Spinal / metabolism*
  • Isomerism
  • Nerve Crush
  • Nerve Regeneration
  • RNA, Messenger / metabolism*
  • Rats
  • Rats, Wistar
  • Receptors, Fibroblast Growth Factor / genetics*
  • Sciatic Nerve / metabolism*

Substances

  • RNA, Messenger
  • Receptors, Fibroblast Growth Factor
  • Fibroblast Growth Factor 2