Elsevier

Neuroscience Letters

Volume 131, Issue 1, 30 September 1991, Pages 37-41
Neuroscience Letters

Distribution of the growth associated protein GAP-43 in the central processes of axotomized primary afferents in the adult rat spinal cord; presence of growth cone-like structures

https://doi.org/10.1016/0304-3940(91)90331-MGet rights and content

Abstract

GAP-43-immunolabelled structures were visualized by electron microscopy in the adult rat L4–L5 superficial dorsal horn 2 weeks after sciatic nerve transection. The majority of immunolabelled elements were unmyelinated axons, but some synaptic terminals and myelinated axons also labelled. The labelled unmyelinated axons were commonly located in prominent bundles which on serial section analysis could be followed into larger single trunks. These enlargements contain many organelles and give rise to smaller processes, which is compatible with their being growth cones. Sciatic nerve transection may result, therefore, in central regenerative processes which reorganize the neuropil and contribute to the decreased sensibility and pain that follows peripheral nerve section.

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  • Cited by (0)

    This work was supported by the MRC, the Wellcome Trust, a Bristol-Myers Squibb Unrestricted Pain Research Grant and NIH Grants NS10161 and NS 11255.

    1

    We thank Dr. L.I. Benowitz for the supply of the antibody.

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