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Stress during pregnancy may increase offspring's risk of asthma
Date:3/17/2010

Stress during pregnancy may raise the risk of asthma in offspring, according to researchers at Brigham and Women's Hospital and Harvard Medical School in Boston. The researchers investigated differences in immune function markers in cord blood between infants born to mothers in high stress environments and those born to mothers with lower stress and found marked differences in patterns that may be associated with asthma risk later in life.

"This is the first study in humans to show that increased stress experienced during pregnancy in these urban, largely minority women, is associated with different patterns of cord blood cytokine production to various environmental stimuli, relative to babies born to lower-stressed mothers," said Rosalind Wright, M.D., M.P.H., associate physician at Brigham and Women's Hospital.

The findings have been published online ahead of print publication in the American Thoracic Society's American Journal of Respiratory and Critical Care Medicine.

Asthma is known to be more prevalent among ethnic minorities and among disadvantaged urban communities, but the disparity is not completely explained by known physical factors. Urban women living in the inner-city also experience significant stress, particularly minority women.

The role of stress in asthma development is poorly understood, but animal studies have suggested that the mother's stress during pregnancy can influence the offspring's immune system, starting in the womb.

To determine whether a similar transference of stress-mediated immune differences may occur with humans, Dr. Wright and colleagues recruited pregnant women in several cites, including Boston, Baltimore, New York and St. Louis. Their families were largely ethnic minorities, 20 percent of whom were living below the poverty level. Each child's mother or a father had a history of asthma or allergy.

In total, 557 families answered detailed questions about the
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Contact: Keely Savoie
ksavoie@thoracic.org
212-315-8620
American Thoracic Society
Source:Eurekalert

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