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How the cerebellum modulates our ability to socialize

How the cerebellum modulates our ability to socialize
The cerebellum is essential for sensorimotor control but also contributes to higher cognitive functions including social behaviors. In a recent study, an international research consortium including scientists from Inserm -- University of Montpellier (France), the Institut de Neurociències Universitat Autònoma de Barcelona (INc-UAB) (Spain), and the University of Lausanne (Switzerland) uncovered how dopamine in the cerebellum modulates social behaviors via its action on D2 receptors (D2R). By using different mouse models and genetic tools, the researchers' work shows that changes in D2R levels in a specific cerebellar cell type, the Purkinje cells, alter sociability and preference for social novelty without affecting motor functions. These new findings pave the way to determine whether socially related psychiatric disorders, such as autism spectrum disorders (ASD), bipolar mood disorder, or schizophrenia, are also associated with altered dopamine receptors expression in specific cerebellar cell types.
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"We have uncovered an unexpected causal link between PCs D2R expression levels right in the center of the cerebellum, the Crus I/II lobules, and the modulation of social behaviors. Reducing the expression of this specific dopamine receptor impaired the sociability of mice as well as their preference for social novelty, while their coordination and motor functions remained unaffected" explains Dr. Laura Cutando, Marie-Curie researcher at the Mitochondrial Neuropathology research group at INc-UAB, and first author of the article.
This study constitutes a first step towards a better understanding of the role of dopamine in the cerebellum and the mechanisms underlying psychiatric disorders such as schizophrenia, ADHD and anxiety disorders, which have all in common aberrant DA signaing and altered social behaviors.
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Artikel bei Sciencedaily.com
Studie bei Nature.com
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