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Mother's exposure to bisphenol A may increase children's chances of asthma
Date:2/3/2010

GALVESTON, Texas For years, scientists have warned of the possible negative health effects of bisphenol A, a chemical used to make everything from plastic water bottles and food packaging to sunglasses and CDs. Studies have linked BPA exposure to reproductive disorders, obesity, abnormal brain development as well as breast and prostate cancers, and in January the Food and Drug Administration announced that it was concerned about "the potential effects of BPA on the brain, behavior and prostate gland of fetuses, infants and young children."

Now, mouse experiments by University of Texas Medical Branch at Galveston researchers have produced evidence that a mother's exposure to BPA may also increase the odds that her children will develop asthma. Using a well-established mouse model for asthma, the investigators found that the offspring of female mice exposed to BPA showed significant signs of the disorder, unlike those of mice shielded from BPA.

"We gave BPA in drinking water starting a week before pregnancy, at levels calculated to produce a body concentration that was the same as that in a human mother, and continued on through the pregnancy and lactation periods," said UTMB associate professor Terumi Midoro-Horiuti, lead author of a paper on the study appearing in the February issue of Environmental Health Perspectives.

Four days after birth, the researchers sensitized the baby mice with an allergy-provoking ovalbumin injection, followed by a series of daily respiratory doses of ovalbumin, the main protein in egg white. The investigators then measured levels of antibodies against ovalbumin and quantities of inflammatory white blood cells known as eosinophils in the lungs of the mouse pups. They also used two different methods to measure lung function.

"What we were looking for is the asthma response to a challenge, something like what might happen if you had asthma and got pollen in your nose or lungs, you might ha
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Contact: Jim Kelly
jpkelly@utmb.edu
409-772-8791
University of Texas Medical Branch at Galveston
Source:Eurekalert

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