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<meta name="description" content="Bernice Porjesz, Ph.D., Department of Psychiatry, State University of New York, Health Sciences Center at Brooklyn, and others from six of the nine universities that comprise NIAAA's Collaborative Study of the Genetics of Alcoholism (COGA) report in today's online version of the Proceedings of the National Academy of Sciences (99[6]:3729-3733) significant linkage and linkage disequilibrium between beta brain wave (EEG) frequency and a cluster of gamma-aminobutyric acid type A (GABA A) receptor genes on human chromosome 4." />
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<title>Alcohol Researchers Identify Genetic Locus of Human Brain Wave (Beta EEG Frequency) | National Institute on Alcohol Abuse and Alcoholism (NIAAA)</title>
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Alcohol Researchers Identify Genetic Locus of Human Brain Wave (Beta EEG Frequency)
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<span>Alcohol Researchers Identify Genetic Locus of Human Brain Wave (Beta EEG Frequency)</span>
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<p><time datetime="2002-03-12T12:00:00Z">Tuesday, March 12, 2002</time>
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<p>Bernice Porjesz, Ph.D., Department of Psychiatry, State University of New York, Health Sciences Center at Brooklyn, and others from six of the nine universities that comprise NIAAA's Collaborative Study of the Genetics of Alcoholism (COGA) report in today's online version of the <em><strong>Proceedings of the National Academy of Sciences</strong></em> (99[6]:3729-3733) significant linkage and linkage disequilibrium between beta brain wave (EEG) frequency and a cluster of gamma-aminobutyric acid type A (GABA A) receptor genes on human chromosome 4. Conducted in the laboratory of COGA Principal Investigator Dr. Henri Begleiter, the study is coauthored by Laura Almasy, Ph.D., Howard J. Edenberg, Ph.D., and Theodore Reich, Ph.D., among others.</p>
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<p>"Drs. Porjesz and Begleiter are the first to find a specific genetic locus associated with fundamental human brain oscillations. Their work contributes to understanding of brain neuroelectric activity and expedites our search for alcoholism risk and protective genes," said NIAAA Acting Director Raynard S. Kington, M.D., Ph.D.</p>
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<p>Since the 1929 discovery of the human electroencephalogram (EEG), scientists have measured brain electrical activity, displayed as undulating lines with "peaks" and "valleys" called waves. Oscillations in these waves represent important features of information processing and are highly heritable. Beta EEG frequency, elevated in alcoholics and their alcohol-naïve offspring, for some years has been regarded as a possible marker of alcoholism susceptibility. While its specific functional role is not yet defined, beta wave oscillation reflects heightened activity of the underlying neuronal network, scientists believe.</p>
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<p>Activity of GABA A, the primary receptor subtype of the inhibitory brain neurotransmitter GABA, is responsible for nerve cell inhibition throughout the brain. Mounting evidence from human and animal studies implicates GABA A in the development of tolerance to and dependence on alcohol and in genetic liability for alcoholism. Among its many functions, GABA A serves as the gatekeeper for neurons that influence beta EEG frequency. Scientists have speculated that some perturbation of GABA A activity is responsible for heightened beta EEG activity in alcoholics and their offspring.</p>
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<p>The authors of today's study relied on recent advances in statistical and molecular genetics that permit scientists to examine neurobiological phenotypes in conjunction with DNA markers. They examined beta EEG frequency and DNA markers in a sample of 1553 individuals drawn from a COGA sample of 250 alcoholism-affected families and found the strongest evidence for linkage with EEG power on the short-arm of chromosome 4 for the beta traits. Their results provide strong evidence for an association between beta EEG frequencies and a cluster of genes located on chromosome 4.</p>
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<p>In 1998, COGA identified a "hot spot" for a possible alcoholism-related gene on chromosome 4 from a whole-genome scan of families with high alcoholism prevalence. At the same time, NIAAA's Laboratory of Neurogenetics reported from independent scan evidence on chromosome 4 for both alcoholism-risk and alcoholism-protective gene loci. Subsequent replication studies have provided additional evidence suggestive of alcohol-related genes in a specific area of chromosome 4.</p>
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<p>Full text of the paper appears at 5:00 p.m. in the PNAS Early Edition at <a href="http://www.pnas.org">www.pnas.org</a> . For interviews with Drs. Porjesz and Begleiter, please telephone 718-270-2912. For an interview with Dr. Kington, please telephone the NIAAA Press Office.</p>
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The National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health, is the primary U.S. agency for conducting and supporting research on the causes, consequences, diagnosis, prevention, and treatment of alcohol use disorder. NIAAA also disseminates research findings to general, professional, and academic audiences. Additional alcohol research information and publications are available at <a href="/" rel="nofollow noreferrer">www.niaaa.nih.gov</a>.</p>
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NIH, the nation's medical research agency, includes 27 Institutes and Centers and is a component of the U.S. Department of Health and Human Services. NIH is the primary federal agency conducting and supporting basic, clinical, and translational medical research, and is investigating the causes, treatments, and cures for both common and rare diseases. For more information about NIH and its programs, visit <a href="https://www.nih.gov/" rel="noreferrer noopener">www.nih.gov</a>.</p>
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