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Study Links Depression In Obese Kids To Stress Hormone Abnormalities

by Sreeraman on June 15, 2009 at 12:31 PM Child Health News

A new study has found a link between symptoms of depression in obese children and abnormalities of the 'stress' hormone.

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"There is evidence in adults that abnormal regulation of cortisol plays a role in both obesity and depression," said the study's lead author, Panagiota Pervanidou, MD, of Athens University Medical School in Athens, Greece.

"Our study indicates that cortisol abnormalities may underlie obesity and depression starting in childhood," Pervanidou added.

Cortisol is a steroid hormone that helps the body respond to stress but also has other functions, including converting fat, protein and carbohydrates into energy.

Normally, levels of this hormone peak in the early morning, start to drop in late morning and reach their low point at night. However, depressed adults have slightly elevated cortisol levels at night-"the endocrine equivalent of chronic stress," Pervanidou said.

This chronic elevation of cortisol contributes to development of the metabolic syndrome, which includes abdominal obesity and other risk factors for diabetes and cardiovascular disease.

In this new study, Pervanidou and colleagues measured cortisol five times a day in the saliva of 50 obese children and teenagers as well as in their blood in the morning.

The 20 boys and 30 girls, ages 8 to 15 years, were patients in the Athens University paediatric obesity clinic and did not have a prior diagnosis of depression. All subjects completed the Children's Depression Inventory (CDI), a questionnaire that assesses self-reported symptoms of depression.

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Study Links Depression In Obese Kids To Stress Hormone Abnormalities

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