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The schizophrenia susceptibility gene dysbindin controls synaptic homeostasis
Dion K Dickman1, Graeme W Davis
1Department of Biochemistry and Biophysics, University of California, San Francisco, CA 94158, USA.
Science (New York, N.Y.)
|December 8, 2009
Summary
Researchers identified dysbindin as crucial for maintaining neural function stability. This gene is vital for adaptive neural plasticity and may link to neurological diseases like schizophrenia.
Area of Science:
- Neuroscience
- Genetics
- Molecular Biology
Background:
- Neural function stabilization is critical for development and lifelong health.
- The molecular mechanisms underlying neural homeostasis are largely unknown.
- Dysbindin, a human gene linked to schizophrenia, has an uncharacterized role in neural function.
Purpose of the Study:
- To elucidate the molecular mechanisms of neural homeostasis.
- To identify genes involved in the homeostatic modulation of synaptic transmission.
- To investigate the role of dysbindin in neural plasticity and adaptation.
Main Methods:
- An electrophysiology-based forward genetic screen in Drosophila.
- Functional assessment of over 250 neuronally expressed genes.
- Analysis of dysbindin's presynaptic function and calcium dependency.
Main Results:
- Identified dysbindin as essential for homeostatic modulation of synaptic transmission.
- Dysbindin functions presynaptically in a dose-dependent manner.
- Dysbindin's role is independent of or downstream of calcium influx.
Conclusions:
- Dysbindin is critical for adaptive neural plasticity and homeostatic signaling.
- Altered dysbindin function may contribute to complex neurological diseases, including schizophrenia.
- This study provides insights into the genetic basis of neural homeostasis.
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