Cover Picture : Proliferating cells in the neonatal mouse forebrain. Neural progenitor cells and their progeny were labeled with a single intraventricular injection of GFP-expressing retroviral vectors five days before birth. Proliferating cells were labeled in red with an antibody against ki67. Up-regulation of Six3 expression in neural progenitor cells keeps them in an undifferentiated state highlighting a role of Six3 in the control of the subtle equilibrium between proliferation and differentiation of defined precursor populations during mammalian neurogenesis. See Appolloni et al. 2008. Six3 controls the neural progenitor status in the murine CNS. Cereb Cortex 18(3): 553-562.
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