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Establishment of an Embryo Implantation Model In Vitro
Published on: June 21, 2024
In vitro-Ishikawa cell test for assessing tissue-specific chemical effects on human endometrium
W R Schaefer1, L Fischer, W R Deppert
1Department of Obstetrics and Gynecology, University Hospital Freiburg, Freiburg, Germany. wolfgang.schaefer@uniklinik-freiburg.de
Reproductive Toxicology (Elmsford, N.Y.)
|February 23, 2010
Summary
A novel in vitro test using human endometrial cells assesses chemical impacts on fertility. This method identifies estrogenic chemicals affecting progesterone receptor (PR) levels, crucial for embryo implantation.
Area of Science:
- Reproductive biology
- Toxicology
- Cell biology
Background:
- Human endometrial receptivity is vital for fertility and can be affected by chemical exposure.
- Assessing chemical risks to human embryo implantation requires human-specific models due to unique biological processes.
- Existing animal models may not accurately predict chemical effects on human reproductive health.
Purpose of the Study:
- To develop and validate a human endometrial cell-based in vitro test for assessing chemical effects on fertility.
- To identify chemicals that may disrupt the implantation window by altering progesterone receptor (PR) expression.
- To establish a reliable method for chemical risk assessment in reproductive toxicology.
Main Methods:
- Utilized human endometrial adenocarcinoma (Ishikawa) cells for a tissue-specific in vitro assay.
- Quantified changes in progesterone receptor (PR) mRNA levels using reverse transcription quantitative real-time PCR.
- Confirmed protein level changes via Western Blotting analysis.
Main Results:
- Established sigmoidal dose-response curves and EC(50) values for estrogenic compounds like 17beta-estradiol, diethylstilbestrol, bisphenol A, and nonylphenol.
- Demonstrated significant PR mRNA up-regulation by these chemicals.
- Identified methoxyacetic acid as a compound that may yield false positives in reporter gene assays and confirmed PR protein up-regulation for tested chemicals.
Conclusions:
- The developed Ishikawa cell-based assay is effective for evaluating chemical impacts on human endometrial receptivity.
- Key estrogenic chemicals, including xenoestrogens like bisphenol A and nonylphenol, can alter PR expression, potentially affecting fertility.
- This human-specific in vitro approach offers a valuable tool for reproductive chemical risk assessment, complementing animal studies.
