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Bipolar Disorder in Kids Linked to Faulty Body Clock Genes
In a collaborative study, researchers found four versions of the regulatory gene RORB that were associated with paediatric bipolar disorder.
Alexander Niculescu from Indiana University School of Medicine, Indianapolis, US, and others at Harvard, UC San Diego, Massachusetts General Hospital and SUNY Upstate Medical University, studied the RORA and RORB genes of 152 children with the condition and 140 control children.
They found four alterations to the RORB gene that were positively associated with being bipolar.
"Our findings suggest that clock genes in general and RORB in particular may be important candidates for further investigation in the search for the molecular basis of bipolar disorder," said Niculescu.
RORB is mainly expressed in the eye, pineal gland and brain. Its expression is known to change as a function of circadian rhythm in some tissues, and mice without the gene exhibit circadian rhythm abnormalities.
"Bipolar disorder is often characterized by circadian rhythm abnormalities, and this is particularly true among pediatric bipolar patients. Decreased sleep has even been noted as one of the earliest symptoms discriminating children with bipolar disorder from those with attention deficit hyperactivity disorder (ADHD). It will be necessary to verify our association results in other independent samples, and to continue to study the relationship between RORB, other clock genes, and bipolar disorder," said Niculescu.
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More News on: Sleep Problems in Children, Development Milestone, Height and Weight-Kids, Healthy Living, Bipolar Disorder
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