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• W3171225328 endingPage "113783" @default.
• W3171225328 startingPage "113783" @default.
• W3171225328 abstract "DYT1 dystonia is a debilitating movement disorder characterized by repetitive, unintentional movements and postures. The disorder has been linked to mutation of the TOR1A/DYT1 gene encoding torsinA. Convergent evidence from studies in humans and animal models suggest that striatal medium spiny neurons and cholinergic neurons are important in DYT1 dystonia. What is not known is how torsinA dysfunction in these specific cell types contributes to the pathophysiology of DYT1 dystonia. In this study we sought to determine whether torsinA dysfunction in cholinergic neurons alone is sufficient to generate the sensorimotor dysfunction and brain changes associated with dystonia, or if torsinA dysfunction in a broader subset of cell types is needed. We generated two genetically modified mouse models, one with selective Dyt1 knock-out from dopamine-2 receptor expressing neurons (D2KO) and one where only cholinergic neurons are impacted (Ch2KO). We assessed motor deficits and performed in vivo 11.1 T functional MRI to assess sensory-evoked brain activation and connectivity, along with diffusion MRI to assess brain microstructure. We found that D2KO mice showed greater impairment than Ch2KO mice, including reduced sensory-evoked brain activity in key regions of the sensorimotor network, and altered functional connectivity of the striatum that correlated with motor deficits. These findings suggest that (1) the added impact of torsinA dysfunction in medium spiny and dopaminergic neurons of the basal ganglia generate more profound deficits than the dysfunction of cholinergic neurons alone, and (2) that sensory network impairments are linked to motor deficits in DYT1 dystonia." @default.
• W3171225328 created "2021-06-22" @default.
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• W3171225328 date "2021-09-01" @default.
• W3171225328 modified "2023-10-16" @default.
• W3171225328 title "Cell-specific effects of Dyt1 knock-out on sensory processing, network-level connectivity, and motor deficits" @default.
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• W3171225328 doi "https://doi.org/10.1016/j.expneurol.2021.113783" @default.
• W3171225328 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8324325" @default.
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