Fate specification in the adult brain – lessons for eliciting neurogenesis from glial cells

Bioessays 35 (3):242-252 (2013)
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Abstract

In the adult mammalian brain, neurogenesis is restricted to few regions, while gliogenesis continues in a wide‐spread manner. Here we discuss our knowledge of extrinsic and intrinsic factors regulating neuro‐ and gliogenesis in the adult brain and propose a model of fate specification identifying the states of easiest transition between glio‐ and neurogenesis, highlighting the unique mechanisms stabilising the neural stem cell state. The model also encompasses the fate alterations achieved by direct reprogramming, and hence addresses a novel avenue for repair, namely eliciting neurogenesis from glial cells outside the neurogenic niches.

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