P 77 Optogenetic stimulations of striatal cholinergic interneurons in an animal model of dystonia

Dystonias are movement disorders, defined by sustained or intermittent muscle contractions causing twisting movements and postures. The most prevalent inherited form of dystonia is caused by a mutation in the gene for torsin A (DYT1, ΔGAG) with incomplete penetrance. It has been hypothesized that an increased activity of cholinergic interneurons in the striatum, resulting in abnormal synaptic plasticity, plays an important role in the disease pathophysiology. However, this hypothesis is merely based on ex vivo electrophysiological recordings in brain slices of animal models which do not show a dystonic phenotype.

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