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Neuroplasticity signaling pathways linked to the pathophysiology of schizophrenia
Authors:Darrick T Balu  Joseph T Coyle
Institution:a Department of Psychiatry, Harvard Medical School, Belmont, MA, USA
b Laboratory for Psychiatric and Molecular Neuroscience, McLean Hospital, Belmont, MA, USA
Abstract:Schizophrenia is a severe mental illness that afflicts nearly 1% of the world's population. One of the cardinal pathological features of schizophrenia is perturbation in synaptic connectivity. Although the etiology of schizophrenia is unknown, it appears to be a developmental disorder involving the interaction of a potentially large number of risk genes, with no one gene producing a strong effect except rare, highly penetrant copy number variants. The purpose of this review is to detail how putative schizophrenia risk genes (DISC-1, neuregulin/ErbB4, dysbindin, Akt1, BDNF, and the NMDA receptor) are involved in regulating neuroplasticity and how alterations in their expression may contribute to the disconnectivity observed in schizophrenia. Moreover, this review highlights how many of these risk genes converge to regulate common neurotransmitter systems and signaling pathways. Future studies aimed at elucidating the functions of these risk genes will provide new insights into the pathophysiology of schizophrenia and will likely lead to the nomination of novel therapeutic targets for restoring proper synaptic connectivity in the brain in schizophrenia and related disorders.
Keywords:Schizophrenia  DISC-1  Neuregulin  ErbB4  Dysbindin  Akt1  BDNF  NMDA receptor
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