Bisphenol A exerts estrogenic effects by modulating CDK1/2 and p38 MAP kinase activity
Hee-Seok Lee1, Eun-Jung Park, Jae-Ho Oh
1a Food Safety Risk Assessment Division , National Institute of Food and Drug Safety Evaluation , Chungcheongbuk-do , Korea.
Bioscience, Biotechnology, and Biochemistry
|August 19, 2014
Summary
Bisphenol A (BPA) acts as an endocrine disruptor by binding estrogen receptors and promoting cell proliferation. BPA mimics estrogenic activity through the p38 MAPK pathway, impacting cell cycle regulation.
Area of Science:
- Endocrinology
- Molecular Biology
- Cell Biology
Background:
- Bisphenol A (BPA) is a known endocrine disruptor.
- Mechanisms of BPA's endocrine disruption are not fully understood.
Purpose of the Study:
- Investigate BPA's interaction with estrogen receptors (ERs).
- Elucidate the role of cell cycle regulation and MAPK pathways in BPA's estrogenic activity.
Main Methods:
- Fluorescence polarization competitive binding assay to assess ER binding.
- MCF-7 cell proliferation assays and gene expression analysis.
- BG1 luciferase ER transactivation assay and MAPK pathway inhibition studies.
Main Results:
- BPA binds to both ER-α and ER-β.
- BPA induces MCF-7 cell proliferation by modulating cell cycle genes.
- BPA exhibits estrogenic activity via the p38 MAPK pathway, not ERK or JNK.
Conclusions:
- BPA mimics ER-dependent estrogenic activity.
- BPA targets cell cycle proteins and the p38 MAPK pathway.
- Understanding BPA's mechanism is crucial for assessing its endocrine-disrupting potential.
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