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The Schizophrenia Susceptibility Gene dysbindin Controls Synaptic Homeostasis
Dion K. Dickman, and
Graeme W. Davis*
Abstract:
The molecular mechanisms that achieve homeostatic stabilizationof neural function remain largely unknown. To better understandhow neural function is stabilized during development and throughoutlife, we used an electrophysiology-based forward genetic screenand assessed the function of more than 250 neuronally expressedgenes for a role in the homeostatic modulation of synaptic transmissionin Drosophila. This screen ruled out the involvement of numeroussynaptic proteins and identified a critical function for dysbindin,a gene linked to schizophrenia in humans. We found that dysbindinis required presynaptically for the retrograde, homeostaticmodulation of neurotransmission, and functions in a dose-dependentmanner downstream or independently of calcium influx. Thus,dysbindin is essential for adaptive neural plasticity and maylink altered homeostatic signaling with a complex neurologicaldisease.
Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94158, USA.
* To whom correspondence should be addressed. E-mail: graeme.davis{at}ucsf.edu
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