New perspectives in cyclic AMP-mediated axon growth and guidance: the emerging epoch of Epac

Andrew G. Peace, Derryck A. Shewan

Research output: Contribution to journalSpecial issue

27 Citations (Scopus)

Abstract

In the search for a cure to brain and spinal cord injury much has been learned about the inhibitory environment of the central nervous system (CNS), and yet a clinical therapy remains elusive. In recent years great advances have been made in understanding intracellular molecular mechanisms that transduce cell surface receptor-mediated signals that neurons receive from their environment. Many of these signalling pathways share common mechanisms, which presents the possibility that manipulating activities of key cell signalling molecules such as those regulated by 3'-5'-cyclic adenosine monophosphate (cAMP) might allow axons to simultaneously overcome the inhibitory effects of a number of extracellular ligands. The identification of Epac, a novel direct intracellular target for cAMP, has opened up a new avenue of research that is beginning to explain how cAMP can mediate a range of neuronal functions including distinct axon growth and guidance decisions. With current research tools that allow more specific activation of proteins or knock-down of their expression, as well as quantitation of protein activities in live cells, it is already becoming clear that Epac plays highly important roles in the development and function of the nervous system. Here, we focus on emerging evidence that Epac mediates cAMP-regulated axon growth and chemoattraction, and thus represents a novel target for overcoming axon growth inhibition and promoting CNS regeneration.
Original languageEnglish
Pages (from-to)280-288
Number of pages9
JournalBrain Research Bulletin
Volume84
Issue number4-5
DOIs
Publication statusPublished - 10 Mar 2010

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Keywords

  • Epac
  • cAMP
  • PKA
  • CNS
  • growth cone
  • axon guidance
  • axon regeneration
  • DRG
  • cell signalling
  • FRET

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