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Updated: Jun 14, 2026
Detecting Estrogenic Ligands in Personal Care Products using a Yeast Estrogen Screen Optimized for the Undergraduate Teaching Laboratory
Published on: January 1, 2018
Droplet-scale estrogen assays in breast tissue, blood, and serum
Noha A Mousa1, Mais J Jebrail, Hao Yang
1Institute of Medical Science, Faculty of Medicine, University of Toronto, 1 King's College Circle, Toronto, Ontario, Canada M5S 1A8.
Abstract:
Estrogen is a key hormone in human reproductive physiology, controlling ovulation and secondary sexual characteristics. In addition, it plays an important role in the pathogenesis of breast cancer. Indeed, estrogen receptor antagonists and aromatase inhibitors (which block estrogen biosynthesis) are primary drugs used for treatment and prevention in at-risk populations. Despite its importance, tissue concentrations of estrogen are not routinely measured because conventional techniques require large samples of biopsies for analysis. In response to this need, we have developed a digital microfluidic method and applied it to the extraction and quantification of estrogen in 1-microliter samples of breast tissue homogenate (as would be collected with fine-needle aspiration), as well as in whole blood and serum. This method may be broadly applicable to conditions requiring frequent analysis of hormones in clinical samples (for example, infertility and cancer).
Insights
Researchers developed a novel digital microfluidic method for measuring estrogen levels. This technique allows precise quantification in small clinical samples, aiding in reproductive health and cancer research.
Area of Science:
- Endocrinology
- Biomedical Engineering
- Analytical Chemistry
Background:
- Estrogen is crucial for reproductive physiology and breast cancer development.
- Current methods for estrogen measurement require large tissue samples, limiting routine analysis.
- Estrogen levels are vital for monitoring conditions like infertility and cancer.
Purpose of the Study:
- To develop a digital microfluidic method for estrogen extraction and quantification.
- To enable hormone analysis using minimal sample volumes.
- To provide a tool for frequent hormone monitoring in clinical settings.
Main Methods:
- Digital microfluidics utilized for sample processing.
- Extraction and quantification of estrogen performed on 1-microliter samples.
- Application to breast tissue homogenate, whole blood, and serum.
Main Results:
- Successful extraction and quantification of estrogen from minute sample volumes.
- Demonstrated applicability to various biological matrices including tissue, blood, and serum.
- Established a sensitive method for hormone analysis.
Conclusions:
- The developed digital microfluidic method offers a sensitive approach for estrogen quantification.
- This technique overcomes limitations of conventional methods requiring large biopsies.
- The method holds broad potential for clinical applications in reproductive health and oncology.
