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Mice lacking L1 have reduced CGRP fibre in-growth into spinal transection lesions

Authors
Journal
Neuroscience Letters
0304-3940
Publisher
Elsevier
Publication Date
Volume
420
Issue
3
Identifiers
DOI: 10.1016/j.neulet.2007.05.015
Keywords
  • Spinal Cord Injury
  • Pain
  • Sprouting
  • Mechanisms
  • Central Sensitization

Abstract

Abstract Repair strategies for spinal cord injury often focus on promoting regeneration of injured axons and stimulating subsequent functional recovery. Although many of these strategies have proven their merits, less is known about potential unwanted side-effects, such as sprouting of nociceptive CGRP immunoreactive axons, which may bring about pain-related behavior. Sprouting of CGRP axons into lesion sites spontaneously occurs after spinal cord injury (SCI). Using L1-deficient mice we show a reduction of such CGRP growth response. This reduction was specific for CGRP axons since the overall neurofilament positive fibre in-growth into the spinal lesion site was not affected. Our results may have important implications on the development and assessment of repair strategies that should not only stimulate functional recovery, but also prevent the development of pain or autonomic dysreflexia.

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