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A genome survey indicates a possible susceptibility locus for bipolar disorder on chromosome 22

By John R. Kelsoe, M. Anne Spence, Erika Loetscher, Montserrat Foguet, A. Dessa Sadovnick, Ronald A. Remick, Pamela Flodman, Jason Khristich, Zofi Mroczkowski-Parker, John L. Brown, Diane Masser, Sharon Ungerleider, Mark H. Rapaport, William L. Wishart and Hermann Luebbert


Bipolar disorder or manic depressive illness is a major psychiatric disorder that is characterized by fluctuation between two abnormal mood states. Mania is accompanied by symptoms of euphoria, irritability, or excitation, whereas depression is associated with low mood and decreased motivation and energy. The etiology is currently unknown; however, numerous family, twin, and adoption studies have argued for a substantial genetic contribution. We have conducted a genome survey of bipolar disorder using 443 microsatellite markers in a set of 20 families from the general North American population to identify possible susceptibility loci. A maximum logarithm of odds score of 3.8 was obtained at D22S278 on 22q. Positive scores were found spanning a region of nearly 32 centimorgans (cM) on 22q, with a possible secondary peak at D22S419. Six other chromosomal regions yielded suggestive evidence for linkage: 3p21, 3q27, 5p15, 10q, 13q31-q34, and 21q22. The regions on 22q, 13q, and 10q have been implicated in studies of schizophrenia, suggesting the possible presence of susceptibility genes common to both disorders

Topics: Biological Sciences
Publisher: The National Academy of Sciences
Year: 2001
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Provided by: PubMed Central
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