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Group Therapy: New approach to psychosis treatment could target multiple nervous system receptors
Date:2/1/2013

Philadelphia, Pa. Antipsychotic drugs, used in the treatment of psychotic disorders involving severe delusions and hallucinations, have been studied for more than 70 years. Currently available antipsychotic drugs, however, only alleviate certain symptoms, with results that vary greatly from patient to patient and frequently cause significant side effects.

A new understanding of how the brain's G-protein receptors work may soon enable a way to better customize and target antipsychotic drugs to treat specific symptoms. Researchers from Virginia Commonwealth University (VCU) will present their findings at the 57th Annual Meeting of the Biophysical Society (BPS), held Feb. 2-6, 2013, in Philadelphia, Pa.

G-protein coupled receptors (GPCRs) are responsible for activating so-called "G-proteins," internal signaling messengers that control the activity of many other internal proteins. The starring role of GPCRs in regulating a cell's activity makes them a leading pharmaceutical target: approximately 50 percent of the antipsychotic drugs produced are aimed at these important nervous system receptors.

A specific GPCR is integral to each of three key pathways for intercellular signaling, one for each of the chemical messengers dopamine, serotonin, and glutamate. But these individual GPCRs also form complexes with each other, altering their effects on signaling in the brain. The VCU team has focused on how GPCR complexes influence signaling in a distinct way from how individual GPCRs operate.

"The realization that receptors in the brain that bind and interpret dopamine, serotonin, and glutamate neurotransmitters form complexes with one another that signal very differently than when these receptors are found in isolation, promises to change the way we approach treatment of psychosis," explains VCU Ph.D. candidate Jason Younkin, who will present the team's findings.

Instead of targeting one neurotransmitter pathway at a time, Yo
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Contact: Ellen R. Weiss
eweiss@biophysics.org
240-290-5606
American Institute of Physics
Source:Eurekalert

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