Journal
IUBMB LIFE
Volume 64, Issue 8, Pages 690-696Publisher
WILEY-BLACKWELL
DOI: 10.1002/iub.1049
Keywords
bisphenol A; breast cancer cell lines; estrogen receptor a; naringenin; endocrine disruptors; p38
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Funding
- University Roma Tre (Roma, Italy)
- Italian Ministry of Health
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Fruit and vegetable consumption has generally been associated with the prevention or suppression of cancer. However, food could contain a multitude of chemicals (e.g., bisphenol A; BPA) that could synergize or antagonize the effects of diet-derived compounds. Remarkably, food containers (e.g., water and infant bottles) are the largest source of exposure to BPA for human beings. Here, the effects of the coexposure of naringenin (Nar, 1.0 X 10-9 M to 1.0 X 10-4 M) and BPA (1.0 X 10-5 M) in estrogen-dependent breast cancer cell lines expressing (i.e., MCF-7 and T47D) or not expressing (i.e., MDA-MB-231) estrogen receptor a (ERa) are reported. Although both Nar and BPA bind to ERa, they induce opposite effects on breast cancer cell growth. BPA induces cell proliferation, whereas Nar only decreases the number of ERa-positive cells (i.e., MCF-7 and T47D). Notably, even in the presence of BPA, Nar impairs breast cancer cell proliferation by activating caspase-3. The molecular pathways involved require p38 activation, whereas, the BPA-induced AKT activation is completely prevented by the Nar treatment. As a whole, Nar maintains its proapoptotic effects even in the presence of the food contaminant BPA, thus, enlarging the chemopreventive potential of this flavanone. (c) 2012 IUBMB IUBMB Life, 64(8): 690696, 2012
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