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Gene expression profiling in Ishikawa cells: a fingerprint for estrogen active compounds
Kathleen Boehme1, Stephanie Simon, Stefan O Mueller
1Merck KGaA, Merck Serono, NCD/Toxicology, Early and Explanatory Toxicology, 64271 Darmstadt, Germany.
Toxicology and Applied Pharmacology
|April 18, 2009
Summary
Estrogen active compounds (EACs) interfere with hormone signaling, causing varied health effects. This study reveals distinct gene expression fingerprints for EACs, aiding in predicting endocrine disruption potential.
Area of Science:
- Endocrinology
- Molecular Biology
- Toxicology
Background:
- Estrogen active compounds (EACs) are environmental substances that disrupt hormone signaling.
- EACs can cause adverse health effects or offer benefits in estrogen-dependent diseases.
- Understanding EACs' impact on gene expression is crucial for assessing health risks.
Purpose of the Study:
- To analyze global gene expression profiles in endometrial cancer cells exposed to various EACs.
- To investigate the role of estrogen receptors (ER) in mediating EAC effects.
- To differentiate EACs' mechanisms of action and identify potential biomarkers for endocrine disruption.
Main Methods:
- Utilized Ishikawa plus (ER-proficient) and Ishikawa minus (ER-deficient) endometrial cancer cells.
- Treated cells with known EACs (e.g., bisphenol A, genistein) and an antiestrogen (ICI 182,780).
- Quantified transcript levels using Illumina BeadChip Arrays 24 hours post-treatment.
Main Results:
- Identified 87 genes with similar expression changes across EACs in ER-proficient cells, confirming ER-dependent regulation.
- Observed mixed estrogenic/antiestrogenic properties for several EACs, including bisphenol A and genistein.
- Resveratrol exhibited a distinct antiestrogenic response, suggesting a unique mechanism of action.
Conclusions:
- EACs elicit specific gene expression patterns that can be used to predict endocrine-disrupting potential.
- Divergent responses highlight the need for careful assessment of EACs' detrimental or beneficial effects.
- Identified gene expression fingerprints and marker genes can aid in screening chemicals with unknown modes of action.
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