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Nature 284, 264 - 265 (20 March 1980); doi:10.1038/284264a0

Axons from CNS neurones regenerate into PNS grafts

P. M. Richardson, U. M. McGuinness & A. J. Aguayo

The Neurosciences Unit, Montreal General Hospital and McGill University, 1650 Cedar Avenue, Montreal, Canada H3G 1A4

Axons in the peripheral nervous system (PNS) and central nervous system (CNS) form sprouts after injury1–3. Elongation of regenerating axonal sprouts has been observed as the exception within the adult mammalian CNS but is the rule in the PNS of mammals as well as in the CNS of some fish and amphibians4. The relative importance of intrinsic neuronal properties and axonal environment in determining the extent of axonal regrowth is unknown5. Neuroglial cells, nerve growth factor and target tissues such as smooth muscle are known to influence neuronal responses to injury6,7. Here we have examined the capacity of transected axons originating in the CNS to regrow into nerve grafts containing Schwann cells.

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