Inhibitory modulation of human estrogen receptor α and β activities by dicyclohexyl phthalate in human breast cancer cell lines.

Authors: Okazaki H, Takeda S, Matsuo S, Matsumoto M, Furuta E, Kohro-Ikeda E, Aramaki H Abstract Phthalate esters (PAEs) are man-made compounds that are used widely in industry, and the ubiquitous exposure of humans to PAEs has been reported. Although some PAEs have been suggested to function as xenoestrogens in in vitro systems, such as human estrogen receptors (ERs) expressed in Chinese hamster ovary (CHO)-K1 cells, few studies have attempted to elucidate whether PAEs affect human ERα/ERβ-mediated signaling in human breast cancer cells (i.e., combination between human ERs and human cells). Thus, further experiments are needed in order to clarify the activities of PAEs. Among the 9 PAEs (carbon# in the side chains: 2-8) investigated, dibutyl phthalate (DBP), dipentyl phthalate (...

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