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Using biomarkers to identify and treat schizophrenia
Date:7/11/2012

In the current online issue of PLoS ONE, researchers at the University of California, San Diego School of Medicine say they have identified a set of laboratory-based biomarkers that can be useful for understanding brain-based abnormalities in schizophrenia. The measurements, known as endophenotypes, could ultimately be a boon to clinicians who sometimes struggle to recognize and treat the complex and confounding mental disorder.

"A major problem in psychiatry is that there are currently no laboratory tests that aid in diagnosis, guide treatment decisions or help predict treatment response or outcomes," said Gregory A. Light, PhD, associate professor of psychiatry and the study's first author. "Diagnoses are currently based on a clinician's ability to make inferences about patients' inner experiences."

Diagnosing and treating schizophrenia is a particularly troubling challenge. The disorder, which affects about 1 percent of the U.S. population or roughly 3 million people, is characterized by a breakdown of normal thought processes and erratic, sometimes dangerous or harmful, behaviors.

"Schizophrenia is among the most severe and disabling conditions across all categories of medicine," said Light, who also directs the Mental Illness, Research, Education and Clinical Center at the San Diego VA Healthcare System.

The precise cause or causes of schizophrenia are not known, though there is a clear genetic component, with the disorder more common in some families.

Clinicians typically diagnose schizophrenia based upon inferences drawn from the patient's inner experiences. That is, their ability to describe what's happening inside their minds.

"But even the best clinicians struggle with diagnostic complexities based on sometimes fuzzy clinical phenomenology," said Light. The clinical challenge is compounded by the fact that "many schizophrenia patients have cognitive and functional impairments," said Light.
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Contact: Scott LaFee
slafee@ucsd.edu
619-543-6163
University of California - San Diego
Source:Eurekalert

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