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Cell Rep. 2013 Jun 27;3(6):1815-23. doi: 10.1016/j.celrep.2013.05.014. Epub 2013 Jun 13.

Choroid-plexus-derived Otx2 homeoprotein constrains adult cortical plasticity.

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Development and Neuropharmacology Group, College de France, Centre for Interdisciplinary Research in Biology, CNRS UMR 7241, Labex Memolife, PSL Research University, 11 Place Marcelin Berthelot, 75005 Paris, France.


Brain plasticity is often restricted to critical periods in early life. Here, we show that a key regulator of this process in the visual cortex, Otx2 homeoprotein, is synthesized and secreted globally from the choroid plexus. Consequently, Otx2 is maintained in selected GABA cells unexpectedly throughout the mature forebrain. Genetic disruption of choroid-expressed Otx2 impacts these distant circuits and in the primary visual cortex reopens binocular plasticity to restore vision in amblyopic mice. The potential to regulate adult cortical plasticity through the choroid plexus underscores the importance of this structure in brain physiology and offers therapeutic approaches to recovery from a broad range of neurodevelopmental disorders.

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