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Home NEWS Science News

Flame retardant exposure linked to income, BMI and household smoking

Bioengineer by Bioengineer
December 21, 2016
in Science News
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A class of flame retardants known as polybrominated diphenyl ethers (PBDEs) have been phased out of production in the U.S. out of concern for their potential neurotoxic effects, particularly in young children. But the compounds persist in older furniture, plastics and textiles, and in dust. Now a new report in the ACS journal Environmental Science & Technology examines the factors that help predict which children could be at a higher risk for exposure to these compounds.

Studies in animals and humans suggest that PBDEs, which are structurally similar to thyroid hormones, could have neurotoxic effects. As a result, various formulations of the flame retardants were phased out in the U.S. as far back as 2004. But the compounds had been added to products such as sofas that people keep for years. And PBDEs can continue to migrate into household dust from these items. Other studies have found that young children, who often put their hands and toys –and any dust that has settled on these items — in their mouths, tend to have the highest concentrations of PBDEs in their blood. Lyndsey Darrow and colleagues wanted to take a closer look to see whether particular groups of children might be affected more than others.

The researchers tested the blood levels of various PBDEs in 80 children between the ages of 1 and 5, all of whom were born after the U.S. phase-out in 2004 of two types of PBDE commercial formulations. Results showed that lower median income within a neighborhood, lower BMI and smoking in the household corresponded to higher PBDE levels. The researchers note that the socioeconomic disparity in PBDE exposure will likely increase over time as the more economically well-off continue to replace their older products with ones that don't contain these flame retardants. The team speculates that lower BMI could lead to higher PBDE blood concentrations because the compounds accumulate in fat, which leaner kids have less of. However, it is unclear why smoking affects PBDE exposure.

###

The authors acknowledge funding from the National Institute of Environmental Health Sciences.

The paper's abstract will be available on Dec. 21 here: http://pubs.acs.org/doi/abs/10.1021/acs.est.6b04696

The American Chemical Society is a nonprofit organization chartered by the U.S. Congress. With nearly 157,000 members, ACS is the world's largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.

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Story Source: Materials provided by Scienmag

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