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Compounds in plastic packaging act as environmental estrogens altering breast genes

Compounds found in plastic products used to wrap or contain food and beverages have aroused concerns as possible cancer-causing agents because they can sometimes leach out of the plastic and migrate into the food, especially after heating or when the plastic is old or scratched. In two studies funded by the National Institute of Environmental Health Sciences, researchers at Fox Chase Cancer Center in Philadelphia have demonstrated that two plasticizer compounds, BPA and BBP, are environmental estrogens capable of affecting gene expression in the mammary glands of young female laboratory rats exposed to the compounds through their mothers' milk.

Raquel Moral, Ph.D., a postdoctoral associate in the Fox Chase laboratory of Jose Russo, M.D., presented the results today at the 96th Annual Meeting of the American Association for Cancer Research. Russo is director of the Breast Cancer and the Environment Research Center at Fox Chase. After the morning poster session, he will give an oral presentation on "Estrogens as Carcinogens in the Human Breast."

"Development of breast cancer entails multiple events, in which estrogen appears to play an important role," explained Russo. "Our laboratory has pioneered an in vitro system of cell transformation using estrogens and their metabolites as carcinogenic agents in human breast cells. Our data show that each compartment of the breast has specific differentially expressed genes that provide a genomic signature according to the increasing maturation of the organ.

"Estrogenic agents involved in breast development and possibly in breast cancer may include foreign estrogens, or xenoestrogens, that are used in manufacturing a number of products. The studies of BPA and BBP in young rats were designed to see whether exposure to these hormonally active biological compounds could alter the genomic signatures of the mammary gland during critical stages of development." BPA (bisphenol A) is a synthetic resin used in foo
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Source:Fox Chase Cancer Center


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