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Transgenerational Exposure to Bisphenol A (BPA) Causes Autism-Like Behavior in Mouse Model—Unexposed Mice Descended from Great-Grandmother Exposed to BPA During Pregnancy Show Evidence of Autism-Like Behavior

Transgenerational bisphenol A (BPA) exposure may contribute to autism, according to a mouse study that was published online on June 12, 2019 in the Endocrine Society's journal Endocrinology. The article is titled “Endocrine Disrupting Chemicals (EDCs) Are Chemicals or Mixtures of Chemicals That Interfere with the Way the Body's Hormones Work.” BPA is a common EDC used in plastics and food storage material, and it is already present in most humans' urine or blood. Animal studies have linked BPA to anxiety, aggression, and poor learning and social interactions. Studies of human populations report associations between BPA and neurobehavioral issues like attention deficit hyperactivity disorder and autism. "Exposure of mouse fetuses to BPA disrupts formation of nerve cell connections in the brain, and this is a transgenerational effect," said the study's senior author, Emilie F. Rissman, PhD, of the University of Virginia School of Medicine in Charlottesville, Virginia, and North Carolina State University in Raleigh, North Carolina. "To put this in human terms, if your great-grandmother was exposed to BPA during her pregnancy and none of your other relatives ever came into contact with BPA, your brain would still show these effects." In this mouse study, researchers tested mice descended from those exposed to BPA for social recognition and found that they showed a social behavioral deficient like autistic behavior. Mice whose great-grandmothers were exposed to BPA during pregnancy were more active and took longer to habituate to strangers than other mice. More strikingly, they didn't explore the new mice that were introduced to the group. Mice are normally very social and curious, so this is an exciting finding. "Even if we ban all BPA right now, that will not change these long-term effects on the brain," Dr. Rissman said.

Other authors of the study include Jennifer T. Wolstenholme of the University of Virginia School of Medicine in Charlottesville, and Virginia Commonwealth University in Richmond; Zuzana Drobná and Joshua W. Irvin of North Carolina State University; Anne D. Henriksen of James Madison University in Harrisonburg, Virginia; Jessica A. Goldsby of the University of Virginia School of Medicine; Rachel Stevenson of Virginia Commonwealth University; and Jodi A. Flaws of the University of Illinois in Urbana, Illinois.

Endocrinologists are at the core of solving the most pressing health problems of our time, from diabetes and obesity to infertility, bone health, and hormone-related cancers. The Endocrine Society is the world's oldest and largest organization of scientists devoted to hormone research and physicians who care for people with hormone-related conditions.

The Endocrine Society has more than 18,000 members, including scientists, physicians, educators, nurses, and students in 122 countries. To learn more about the Society and the field of endocrinology, visit the Society’s site at http://www.endocrine.org.

[Press release] [Endocrinology abstract]