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Activity-Dependent Gating of Parvalbumin Interneuron Function by the Perineuronal Net Protein Brevican.

Neuron | Aug 2, 2017

Activity-dependent neuronal plasticity is a fundamental mechanism through which the nervous system adapts to sensory experience. Several lines of evidence suggest that parvalbumin (PV+) interneurons are essential in this process, but the molecular mechanisms underlying the influence of experience on interneuron plasticity remain poorly understood. Perineuronal nets (PNNs) enwrapping PV+ cells are long-standing candidates for playing such a role, yet their precise contribution has remained elusive. We show that the PNN protein Brevican is a critical regulator of interneuron plasticity. We find that Brevican simultaneously controls cellular and synaptic forms of plasticity in PV+ cells by regulating the localization of potassium channels and AMPA receptors, respectively. By modulating Brevican levels, experience introduces precise molecular and cellular modifications in PV+ cells that are required for learning and memory. These findings uncover a molecular program through which a PNN protein facilitates appropriate behavioral responses to experience by dynamically gating PV+ interneuron function.

Pubmed ID: 28712654 RIS Download

Mesh terms: Animals | Brevican | Extracellular Matrix | GABAergic Neurons | Interneurons | Memory | Mice | Neuronal Plasticity | Parvalbumins | Visual Cortex

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