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Shen, S.a and Lang, B.a and Nakamoto, C.a and Zhang, F.a and Pu, J.a and Kuan, S.-L.a and Chatzi, C.a and He, S.b and Mackie, I.c and Brandon, N.J.d and Marquis, K.L.d and Day, M.e and Hurko, O.e f and McCaig, C.D.a and Riedel, G.a and St Clair, D.a
2008
Schizophrenia-related neural and behavioral phenotypes in transgenic mice expressing truncated Disc1
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28
43
10893
10904
Disrupted-in-Schizophrenia-1 (DISC1), identified by positional cloning of a balanced translocation (1;11) with the breakpoint in intron 8 of a large Scottish pedigree, is associated with a range of neuropsychiatric disorders including schizophrenia. To model this mutation in mice, we have generated Disc1tr transgenic mice expressing 2 copies of truncated Disc1 encoding the first 8 exons using a bacterial artificial chromosome (BAC). With this partial simulation of the human situation, we have discovered a range of phenotypes including a series of novel features not previously reported. Disc1tr transgenic mice display enlarged lateral ventricles, reduced cerebral cortex, partial agenesis of the corpus callosum, and thinning of layers II/III with reduced neural proliferation at midneurogenesis. Parvalbumin GABAergic neurons are reduced in the hippocampus and medial prefrontal cortex, and displaced in the dorsolateral frontal cortex. In culture, transgenic neurons grow fewer and shorter neurites. Behaviorally, transgenic mice exhibit increased immobility and reduced vocalization in depression-related tests, and impairment in conditioning of latent inhibition. These abnormalities in Disc1tr transgenic mice are consistent with findings in severe schizophrenia. Copyright © 2008 Society for Neuroscience.
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