Estrogenic chemicals often leach from BPA-free plastic products that are replacements for BPA-containing polycarbonate products

Environmental Health

Research

Matthew A Stoner¹  Chun Z Yang¹  George D Bittner² 

[1] CertiChem, Inc., 11212 Metric Blvd, Suite 500, Austin, TX, USA;CertiChem, Inc., 11212 Metric Blvd, Suite 500, Austin, TX, USA;Department of Neuroscience, The University of Texas, Austin, TX, USA;

关键词: BG1Luc;    Bisphenol A;    BPA;    Estrogenic activity;    MCF-7, BG1Luc;    Polycarbonate plastic;    Human health;   

DOI  :  10.1186/1476-069X-13-41

 received in 2014-03-16, accepted in 2014-05-05,  发布年份 2014

来源: Springer

【 摘 要 】

BackgroundXenobiotic chemicals with estrogenic activity (EA), such as bisphenol A (BPA), have been reported to have potential adverse health effects in mammals, including humans, especially in fetal and infant stages. Concerns about safety have caused many manufacturers to use alternatives to polycarbonate (PC) resins to make hard and clear, reusable, plastic products that do not leach BPA. However, no study has focused on whether such BPA-free PC-replacement products, chosen for their perceived higher safety, especially for babies, also release other chemicals that have EA.MethodsWe used two, well-established, mammalian cell-based, assays (MCF-7 and BG1Luc) to assess the EA of chemicals that leached into over 1000 saline or ethanol extracts of 50 unstressed or stressed (autoclaving, microwaving, and UV radiation) BPA-free PC-replacement products. An EA antagonist, ICI 182,780, was used to confirm that agonist activity in leachates was due to chemicals that activated the mammalian estrogen receptor.ResultsMany unstressed and stressed, PC-replacement-products made from acrylic, polystyrene, polyethersulfone, and Tritan™ resins leached chemicals with EA, including products made for use by babies. Exposure to various forms of UV radiation often increased the leaching of chemicals with EA. In contrast, some BPA-free PC-replacement products made from glycol-modified polyethylene terephthalate or cyclic olefin polymer or co-polymer resins did not release chemicals with detectable EA under any conditions tested.ConclusionsThis hazard assessment survey showed that many BPA-free PC- replacement products still leached chemicals having significant levels of EA, as did BPA-containing PC counterparts they were meant to replace. That is, BPA-free did not mean EA-free. However, this study also showed that some PC-replacement products did not leach chemicals having significant levels of EA. That is, EA-free PC-replacement products could be made in commercial quantities at prices that compete with PC-replacement products that were not BPA-free. Since plastic products often have advantages (price, weight, shatter-resistance, etc.) compared to other materials such as steel or glass, it is not necessary to forgo those advantages to avoid release into foodstuffs or the environment of chemicals having EA that may have potential adverse effects on our health or the health of future generations.

【 授权许可】

CC BY   
© Bittner et al.; licensee BioMed Central Ltd. 2014