Common DISC1 Polymorphisms Disrupt Wnt/GSK3β Signaling and Brain Development
Author(s)Singh, Karun K.; De Rienzo, Gianluca; Drane, Laurel; Mao, Yingwei; Flood, Zachary; Madison, Jon M.; Ferreira, Manuel; Bergen, Sarah; King, Cillian; Sklar, Pamela; Sive, Hazel; Tsai, Li-Huei; Singh, Karun K.; ... Show more Show less
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Disrupted in Schizophrenia-1 (DISC1) is a candidate gene for psychiatric disorders and has many roles during brain development. Common DISC1 polymorphisms (variants) are associated with neuropsychiatric phenotypes including altered cognition, brain structure, and function; however, it is unknown how this occurs. Here, we demonstrate using mouse, zebrafish, and human model systems that DISC1 variants are loss of function in Wnt/GSK3β signaling and disrupt brain development. The DISC1 variants A83V, R264Q, and L607F, but not S704C, do not activate Wnt signaling compared with wild-type DISC1 resulting in decreased neural progenitor proliferation. In zebrafish, R264Q and L607F could not rescue DISC1 knockdown-mediated aberrant brain development. Furthermore, human lymphoblast cell lines endogenously expressing R264Q displayed impaired Wnt signaling. Interestingly, S704C inhibited the migration of neurons in the developing neocortex. Our data demonstrate DISC1 variants impair Wnt signaling and brain development and elucidate a possible mechanism for their role in neuropsychiatric phenotypes.
DepartmentMassachusetts Institute of Technology. Department of Brain and Cognitive Sciences; Picower Institute for Learning and Memory
Singh, Karun K., Gianluca De Rienzo, Laurel Drane, Yingwei Mao, Zachary Flood, Jon Madison, Manuel Ferreira, et al. “Common DISC1 Polymorphisms Disrupt Wnt/GSK3β Signaling and Brain Development.” Neuron 72, no. 4 (November 2011): 545–558. © 2011 Elsevier Inc.
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