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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Rapid ocular dominance plasticity requires cortical but not geniculate protein synthesis.

Synaptic plasticity is a multistep process in which rapid, early phases eventually give way to slower, more enduring stages. Diverse forms of synaptic change share a common requirement for protein synthesis in the late stages of plasticity, which are often associated with structural rearrangements. Ocular dominance plasticity in the primary visual cortex (V1) is a long-lasting form of activity-dependent plasticity comprised of well-defined physiological and anatomical stages. The molecular events underlying these stages remain poorly understood. Using the protein synthesis inhibitor cycloheximide, we investigated a role for protein synthesis in ocular dominance plasticity. Suppression of cortical, but not geniculate, protein synthesis impaired rapid ocular dominance plasticity, while leaving neuronal responsiveness intact. These findings suggest that structural changes underlying ocular dominance plasticity occur rapidly following monocular occlusion, and cortical changes guide subsequent alterations in thalamocortical afferents.[1]


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