Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Prenatal Exposure to BPA Might Explain Aggressive Behavior in Some 2-Year-old Girls

07.10.2009
Daughters of women exposed to a common chemical found in some plastics while they were pregnant are more likely to have unusually aggressive and hyperactive behaviors as 2-year-olds, according to a new study by researchers at Simon Fraser University, the University of North Carolina at Chapel Hill and Cincinnati Children’s Hospital.

The study, published Oct. 6, 2009 in the journal Environmental Health Perspectives, is the first to examine if there is a link between prenatal bisphenol A (BPA) exposure and behavior problems in children. Results suggest that if a woman is exposed to BPA early in her pregnancy, development of the baby’s nervous system might be adversely affected.

BPA is commonly used in the production of polycarbonate plastics and epoxy resins that can be found, for example, in some types of plastic bottles, canned food linings, water supply pipes and medical tubing. About 93 percent of people in the United States have detectible levels of BPA in their urine, according to the Centers for Disease Control and Prevention.

Researchers found that daughters of women who had higher concentrations of BPA in their urine samples during pregnancy were more likely to have aggressive and hyperactive behaviors than children of women with lower BPA levels, especially if higher exposure was seen earlier in pregnancy.

“In other words, girls whose mothers had higher BPA exposure were more likely to act like boys than girls whose mothers had lower BPA levels, especially if the exposure was seen earlier in pregnancy,” said the study’s lead author Joe Braun, a doctoral student in epidemiology at the UNC Gillings School of Global Public Health. “Boys’ behavior did not seem to be affected, although there was some evidence of increased internalizing scores among BPA-exposed boys.”

Researchers do not know why girls seem to be affected by the exposure more or differently than boys.

BPA has been used in products for decades, and concerns about its safety have been growing in recent years, Braun said. Previous studies in mice have shown that the offspring of mothers with high BPA exposure during pregnancy were more aggressive than offspring not exposed to high prenatal levels of BPA.

“We wanted to know if there was a risk in humans for neurodevelopment problems,” he said. “Study results indicate that exposure to BPA early in the pregnancy seems to be the most critical issue. The most damaging exposure might happen before a woman even knows she’s pregnant.”

Braun worked with researchers at the Cincinnati Children’s Hospital Medical Center, the University of Cincinnati, the Centers for Disease Control and Prevention, and Simon Fraser University in Vancouver, British Columbia.

For the study, urine samples were taken from 249 pregnant women in Cincinnati, Ohio, at 16 weeks and 26 weeks of pregnancy, and again at birth. BPA concentrations in the samples were measured. Then, when the children were 2 years old, behavior problems were assessed, using the Behavioral Assessment System for Children-2 (BASC-2).

“Many government agencies and consumers in the U.S., Canada and around the world have expressed concerns about BPA exposure, especially in children,” said Dr. Bruce Lanphear, professor of children’s environmental health in the Faculty of Health Sciences at Simon Fraser University and the study’s senior author. “Canada has banned BPA in baby bottles and other baby products, but that might not be sufficient to protect children. Although this is the first study of its kind, it suggests that we may also need to reduce exposures during pregnancy.”

The study was funded in part by the National Institute of Environmental Health Sciences and the U.S. Environmental Protection Agency.

For more information on the study, visit: www.ehponline.org.

Note: Braun can be reached at (919) 951-8519 or jmbraun@unc.edu. Lanphear can be reached at (778) 387-3939 or blanphear@sfu.ca.

Ramona DuBose | Newswise Science News
Further information:
http://www.unc.edu

More articles from Studies and Analyses:

nachricht Drone vs. truck deliveries: Which create less carbon pollution?
31.05.2017 | University of Washington

nachricht New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Can we see monkeys from space? Emerging technologies to map biodiversity

An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.

Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...

Im Focus: Climate satellite: Tracking methane with robust laser technology

Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.

Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...

Im Focus: How protons move through a fuel cell

Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.

As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...

Im Focus: A unique data centre for cosmological simulations

Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.

With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...

Im Focus: Scientists develop molecular thermometer for contactless measurement using infrared light

Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine

Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Plants are networkers

19.06.2017 | Event News

Digital Survival Training for Executives

13.06.2017 | Event News

Global Learning Council Summit 2017

13.06.2017 | Event News

 
Latest News

Quantum thermometer or optical refrigerator?

23.06.2017 | Physics and Astronomy

A 100-year-old physics problem has been solved at EPFL

23.06.2017 | Physics and Astronomy

Equipping form with function

23.06.2017 | Information Technology

VideoLinks
B2B-VideoLinks
More VideoLinks >>>