Gene-environment interaction elicits dystonia-like features and impaired translational regulation in a DYT-TOR1A mouse model

ABSTRACT: DYT-TOR1A dystonia is a movement disorder characterized by involuntary muscle contractions. Despite being the most common monogenetic form of dystonia, its pathophysiolofy remains unclear. With a reduced penetrance of about 30%, there is a suggestion that extragenetic factors are needed to develeop a dystonic phenotype. In the present study, we induced a sciatic nerve crush injury in a genetically predisposed DYT-TOR1A mouse model (DYT1KI) to evoke a dystonic phenotype. Subsequently, we employed a multi-omic approach to uncover novel pathophysiological pathways associated with DYT-TOR1A dystonia. Utilizing a deep-learning-based characterization of the dystonic phenotype, we observed that nerve-injured DYT1KI animals exhibited significantly more dystonia-like movement (DLM) compared to naive DYT1KI animals, with noticeable effects as early as two weeks post-surgery. Moreover, nerve-injured DT1KI mice displayed significantly more DLM than their wildtype (wt) counterparts starting 6 weeks post-injury. In the cerebellum of nerve-injured wt mice, multi-omice analysis indicated regulatory changes in translation-related processes, a phenomenon not observed in the cerebellum of nerve-injured DYT1KI mice; instead, these changes were localized to the cortex and striatum. Our findings suggest a failure of translational compensatory mechanisms in the cerebellum of phenotypic DY1KI mice displaying DLM, while dysregulations in translation in the cortex and striatum likely contribute to the promotion of the dystonic phenotype.

INSTRUMENT(S): Orbitrap Fusion

ORGANISM(S): Mus Musculus (mouse)

TISSUE(S): Brain

SUBMITTER: Colette Reinhold  

LAB HEAD: Prof. Dr. Chi Wang Ip

PROVIDER: PXD047531 | Pride | 2024-03-05

REPOSITORIES: Pride