Transient and Localized Optogenetic Activation of Somatostatin-interneurons in Mouse Visual Cortex Abolishes Long-term Cortical Plasticity Due to Vision Loss

Overview

Journal Brain Struct Funct

Specialty Neurology

Date 2018 Jan 27

PMID 29372324

Citations 9

Authors

Isabelle Scheyltjens

Samme Vreysen

Chris Van den Haute

Victor Sabanov

Detlef Balschun

Veerle Baekelandt

Lutgarde Arckens

Affiliations

Soon will be listed here.

Abstract

Unilateral vision loss through monocular enucleation (ME) results in partial reallocation of visual cortical territory to another sense in adult mice. The functional recovery of the visual cortex occurs through a combination of spared-eye potentiation and cross-modal reactivation driven by whisker-related, somatosensory inputs. Brain region-specific intracortical inhibition was recently recognized as a crucial regulator of the cross-modal component, yet the contribution of specific inhibitory neuron subpopulations remains poorly understood. Somatostatin (SST)-interneurons are ideally located within the cortical circuit to modulate sensory integration. Here we demonstrate that optogenetic stimulation of visual cortex SST-interneurons prior to eye removal decreases ME-induced cross-modal recovery at the stimulation site. Our results suggest that SST-interneurons act as local hubs, which are able to control the influx and extent of cortical cross-modal inputs into the deprived cortex. These insights critically expand our understanding of SST-interneuron-specific regulation of cortical plasticity induced by sensory loss.

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