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\nResearchers linked more than 100 genetic regions to schizophrenia, including 83 that were previously unrecognized. The findings may lead to new strategies for treating this serious brain disorder.
\nSchizophrenia affects about 1 in 100 people. It causes hallucinations, delusions, and other mental problems. The illness usually strikes during young adulthood and lasts a lifetime.
\nSchizophrenia tends to run in families, which suggests that genes might play a role. To learn more, NIH-funded scientists compared the genomes of about 37,000 people who have schizophrenia and 113,000 people who don\u2019t.
\nTiny variations in 108 genetic regions were more common in the schizophrenia group; 83 of these regions hadn\u2019t been linked to schizophrenia before.
\nAmong the connections were ties to the brain chemical dopamine, a known target for schizophrenia medications. Another was to immune system function, which had been suspected before. Links were also found with genes related to learning and memory, communication between brain cells, and other functions.
\n\u201cThese results underscore that genetic programming affects the brain in tiny, incremental ways that can increase the risk for developing schizophrenia,\u201d says Dr. Thomas Lehner, an NIH expert in genetics and mental health.
\nThe researchers note that the genetic sites they found don\u2019t necessarily cause schizophrenia. They might be a sign of disease-causing variations nearby. Larger studies will help pinpoint the genetic factors that raise the risk for schizophrenia.
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Reference: Biological insights from 108 schizophrenia-associated genetic loci. Schizophrenia Working Group of the Psychiatric Genomics Consortium. Nature. 2014 Jul 24;511(7510):421-7. doi: 10.1038/nature13595. Epub 2014 Jul 22. PMID: 25056061.
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