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The Journal of Neuroscience, July 1, 2001, 21(13):4782-4788
Adult Neuronal Regeneration Induced by Transgenic Integrin Expression
Maureen L. Condic Department of Neurobiology and Anatomy, University of Utah School of Medicine, Salt Lake City, Utah 84132-0002
In a variety of adult CNS injury models, embryonic neurons exhibit superior regenerative performance when compared with adult neurons. It is unknown how young neurons extend axons in the injured adult brain, in which adult neurons fail to regenerate. This study shows that cultured adult neurons do not adapt to conditions that are characteristic of the injured adult CNS: low levels of growth-promoting molecules and the presence of inhibitory proteoglycans. In contrast, young neurons readily adapt to these same conditions, and adaptation is accompanied by an increase in the expression of receptors for growth-promoting molecules (receptors of the integrin family). Surprisingly, the regenerative performance of adult neurons can be restored to that of young neurons by gene transfer-mediated expression of a single
-integrin.
Key words: regeneration; intrinsic factors; integrin; inhibitory matrix; chondroitin sulfate proteoglycans; adenovirus-mediated gene transfer
Copyright © 2001 Society for Neuroscience 0270-6474/01/21134782-07$05.00/0
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