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

various stressors in their lives, at home (including domestic violence), in their financial situations and in their neighborhoods (community violence). When the infants were born, their cord blood was collected and isolated immune cells were stimulated with a number of factors (allergens like dust and cockroach, viral and bacterial stimulants), then analyzed for the production of various cytokines as indicators of how the child's immune system was primed to respond to the environment.

The researchers found that the patterns of cytokines related to certain stimulants differed based on the level of stress mothers reported.

"The ctyokine patterns seen in the higher stress groups, which are an indication of how the child's immune system is functioning at birth, may be a marker of increased risk for developing asthma and allergy as they get older," explained Dr. Wright.

"For example, while the debate continues as to whether primary sensitization to allergens begins before birth, these findings suggest the possibility that prenatal stress may enhance the neonates' response to inhalant antigens, specifically those antigens that the fetus is likely to encounter more directly in utero, like dust mite."

The research, a prospective cohort study funded by the National Institute of Allergy and Infectious Diseases, will continue as the infants grow up to determine whether maternal stress levels do indeed have an impact on asthma development.

"The current findings suggest that psychological stress is involved in programming of the infant immune response and that this influence begins during pregnancy," said Dr. Wright. "As these infants mature, we will learn how these factors manifest later in terms of the development of asthma and allergy."


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Contact: Keely Savoie
ksavoie@thoracic.org
212-315-8620
American Thoracic Society
Source:Eurekalert

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