RT Journal Article SR Electronic T1 The Schizophrenia Susceptibility Gene Dysbindin Regulates Dendritic Spine Dynamics JF The Journal of Neuroscience JO J. Neurosci. FD Society for Neuroscience SP 13725 OP 13736 DO 10.1523/JNEUROSCI.0184-14.2014 VO 34 IS 41 A1 Jia, Jie-Min A1 Hu, Zhonghua A1 Nordman, Jacob A1 Li, Zheng YR 2014 UL http://www.jneurosci.org/content/34/41/13725.abstract AB Dysbindin is a schizophrenia susceptibility gene required for the development of dendritic spines. The expression of dysbindin proteins is decreased in the brains of schizophrenia patients, and neurons in mice carrying a deletion in the dysbindin gene have fewer dendritic spines. Hence, dysbindin might contribute to the spine pathology of schizophrenia, which manifests as a decrease in the number of dendritic spines. The development of dendritic spines is a dynamic process involving formation, retraction, and transformation of dendritic protrusions. It has yet to be determined whether dysbindin regulates the dynamics of dendritic protrusions. Here we address this question using time-lapse imaging in hippocampal neurons. Our results show that dysbindin is required to stabilize dendritic protrusions. In dysbindin-null neurons, dendritic protrusions are hyperactive in formation, retraction, and conversion between different types of protrusions. We further show that CaMKIIα is required for the stabilization of mushroom/thin spines, and that the hyperactivity of dendritic protrusions in dysbindin-null neurons is attributed in part to decreased CaMKIIα activity resulting from increased inhibition of CaMKIIα by Abi1. These findings elucidate the function of dysbindin in the dynamic morphogenesis of dendritic protrusions, and reveal the essential roles of dysbindin and CaMKIIα in the stabilization of dendritic protrusions during neuronal development.