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Abstract
In the last few years Purkinje cells have become a most interesting model to investigate cellular/molecular mechanisms of axon regeneration and plasticity. Adult Purkinje cells are most peculiar for their weak cell body response to axotomy, which is accompanied by a strong resistance to injury and a virtually absolute inability to regenerate severed neurites, even in the presence of favourable environmental conditions. The same neurons show a vigorous intrinsic inclination toward axonal sprouting and structural plasticity, which can be elicited by removing extrinsic growth-inhibitory cues. These features gradually develop during early postnatal life, but the underlying mechanisms and biological significance remain unclear. This article reviews recent studies aimed at addressing these questions with respect to the general issue of brain repair. Indeed, understanding the reasons for the extremely poor regenerative capacity of Purkinje cells will be most important to elucidate basic biological mechanisms of axon regeneration and plasticity, and to promote circuit rewiring in the adult CNS.
Published Version
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