title: Up-regulation of calcyon results in locomotor hyperactivity and reduced anxiety in mice.
abstract: Gene linkage and association studies have implicated the region of chromosome 10q containing the calcyon locus with attention deficit hyperactivity disorder (ADHD), bipolar disorder, and schizophrenia susceptibility. In addition, levels of calcyon protein and transcripts are also significantly increased in postmortem tissue from schizophrenic brains. But whether altered calcyon expression might be part of the disease etiology or merely a patho-physiological side effect is not known. To begin to address this issue, we generated a transgenic mouse line (Cal(OE)) using the human calcyon cDNA in which calcyon expression is up-regulated in a number of forebrain structures including the hippocampus, prefrontal cortex (PFC), striatum, and amygdala. Compared to control littermates, the Cal(OE) mice display a range of abnormal behaviors including spontaneous hyperactivity, reduced anxiety, and/or impaired restraint (harm avoidance) that would indicate that calcyon up-regulation leads to deficits in control over behavioral output.
authors.affiliation: Department of Neuroscience, Medical University of South Carolina, Charleston, SC, USA.
authors.forename: Heather
authors.initials: H
authors.lastname: Trantham-Davidson
authors.forename: Almira
authors.initials: A
authors.lastname: Vazdarjanova
authors.forename: Rujuan
authors.initials: R
authors.lastname: Dai
authors.forename: Alvin
authors.initials: A
authors.lastname: Terry
authors.forename: Clare
authors.initials: C
authors.lastname: Bergson
mesh_terms: D000679:Amygdala / Q000378:metabolism; D000818:Animals; D001007:Anxiety / Q000378:metabolism; D001362:Avoidance Learning / Q000502:physiology; D005106:Exploratory Behavior / Q000502:physiology*; D006624:Hippocampus / Q000378:metabolism; D006948:Hyperkinesis / Q000378:metabolism*; D007175:Impulsive Behavior / Q000378:metabolism*; D008297:Male; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D008822:Mice, Transgenic; D009043:Motor Activity / Q000502:physiology; D017072:Neostriatum / Q000378:metabolism; D017397:Prefrontal Cortex / Q000378:metabolism; D016548:Prosencephalon / Q000378:metabolism*; D015854:Up-Regulation
chemical_list: D008565:Membrane Proteins; C405464:calcyon