Synapse-associated protein 90/postsynaptic density protein 95-associated protein 3 (SAPAP3) is an excitatory postsynaptic protein implicated in the pathogenesis of obsessive-compulsive behaviors. In mice, genetic deletion of Sapap3 causes obsessive-compulsive disorder (OCD)-like behaviors that are rescued by striatal expression of Sapap3, demonstrating the importance of striatal neurotransmission for the OCD-like behaviors. In the striatum, there are two main excitatory synaptic circuits, corticostriatal and thalamostriatal. Neurotransmission defects in either or both of these circuits could potentially contribute to the OCD-like behaviors of Sapap3 knockout (KO) mice. Previously, we reported that Sapap3 deletion reduces corticostriatal alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionic acid-type glutamate receptor-mediated synaptic transmission.
Pubmed ID: 23414593 RIS Download
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