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The Journal of Neuroscience, November 1, 1998, 18(21):8875-8885
Accumulation of F-Spondin in Injured Peripheral Nerve
Promotes the Outgrowth of Sensory Axons
Tal
Burstyn-Cohen1,
Ayala
Frumkin1,
Yi-Tian
Xu2,
Steven S.
Scherer2, and
Avihu
Klar1
1 Department of Anatomy and Cell Biology, The Hebrew
University-Hadassah Medical School, Jerusalem, 91120 Israel, and
2 Department of Neurology, The University of Pennsylvania,
Philadelphia, Pennsylvania 19104-6077
F-spondin, an extracellular matrix protein, is present in
peripheral nerve during embryonic development, but its amount
diminishes by birth. Axotomy of adult rat sciatic nerve, however,
causes a massive upregulation of both F-spondin mRNA and protein distal to the lesion. F-spondin in the distal stump of axotomized nerve promotes neurite outgrowth of sensory neurons, as revealed by protein
neutralization with F-spondin-specific antibodies. Thus, F-spondin is
likely to play a role in promoting axonal regeneration after nerve
injury.
Key words:
nerve regeneration; neurite outgrowth; Schwann cells; extracellular matrix; F-spondin; sensory axons
Copyright © 1998 Society for Neuroscience 0270-6474/98/18218875-11$05.00/0
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