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Toxicol In Vitro. 2013 Sep;27(6):1937-43. doi: 10.1016/j.tiv.2013.06.017. Epub 2013 Jul 9.

Cooperation of bisphenol A and leptin in inhibition of caspase-3 expression and activity in OVCAR-3 ovarian cancer cells.

Author information

1
Department of Physiology and Toxicology of Reproduction, Chair of Animal Physiology, Institute of Zoology, Jagiellonian University, Krakow, Poland. anna.ptak@uj.edu.pl

Abstract

This study was designed to investigate the effect of bisphenol A and leptin on caspase-3 expression and activity in OVCAR-3 ovarian cancer cells. Caspase-3 and survivin expression was measured at the transcript level by real-time PCR and at the protein level by Western blotting. In addition, caspase-3 activity was measured, using a fluorometric assay, upon exposure to bisphenol A (40 nM) alone, leptin (2.5 nM) alone, and the combination of both agents. 17β-estradiol (40 nM) was used as a positive control for estrogenic properties of bisphenol A. Results showed that the interaction between bisphenol A and leptin, which was similar to that observed between 17β-estradiol and leptin, led to the inhibition of caspase-3 expression and activity in OVCAR-3 cells. Surprisingly, survivin was found to not be involved in the anti-apoptotic activity of either agent. Also, results showed that leptin inhibits caspase-3 activity by acting on the signal transducers and activators of transcription 3 (STAT3) pathway, but bisphenol A and 17β-estradiol by the extracellular-signal-regulated kinases 1/2 (ERK1/2) pathway. In conclusion, the study reveals that bisphenol A and leptin interact to inhibit caspase-3 expression and activity by modulating STAT3 and ERK1/2 signaling pathways in OVCAR-3 cells.

KEYWORDS:

Bisphenol A; Caspase-3; ERK1/2; Leptin; OVCAR-3; STAT3; Survivin

PMID:
23850738
DOI:
10.1016/j.tiv.2013.06.017
[Indexed for MEDLINE]

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