http://www.sciencedirect.com/science/article/pii/S1534580712004777
Summary
The
adult zebrafish brain, unlike mammalian counterparts, can regenerate
after injury owing to the neurogenic capacity of stem cells with radial
glial character. We hypothesized that injury-induced regenerative
programs might be turned on after injury in zebrafish brain and enable
regenerative neurogenesis. Here we identify one such gene—the
transcription factor gata3—which is expressed only after injury
in different zebrafish organs. Gata3 is required for reactive
proliferation of radial glia cells, subsequent regenerative
neurogenesis, and migration of the newborn neurons. We found that these
regeneration-specific roles of Gata3 are dependent on the injury because
Gata3 overexpression in the unlesioned adult zebrafish brain is not
sufficient to induce neurogenesis. Thus, gata3 acts as a specific injury-induced proregenerative factor that is essential for the regenerative capacity in vertebrates.
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