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Published on: September 19, 2017
Detection of hormone active chemicals using genetically engineered yeast cells and microfluidic devices with
Kosuke Ino1, Yusuke Kitagawa, Tsuyoshi Watanabe
1Graduate School of Environmental Studies, Tohoku University, Sendai, Japan.
Electrophoresis
|October 6, 2009
Summary
A new portable microfluidic device uses genetically engineered yeast biosensors to rapidly detect hormone-active chemicals. This technology enables sensitive electrochemical detection of endocrine disruptors like 17beta-estradiol and antagonists.
Area of Science:
- Biotechnology and Biosensing
- Environmental Chemistry
- Analytical Chemistry
Background:
- Endocrine-disrupting chemicals (EDCs) mimic hormones, posing toxicological risks.
- Rapid, portable detection methods for EDCs are crucial for environmental and health monitoring.
- Existing detection methods can be slow, complex, or require specialized equipment.
Purpose of the Study:
- To develop a portable microfluidic device for sensitive and rapid detection of hormone-active chemicals.
- To utilize genetically engineered yeast as biosensors within the microfluidic system.
- To enable electrochemical detection of specific biomarkers produced by the yeast in response to EDCs.
Main Methods:
- Engineered yeast cells synthesizing beta-galactosidase (beta-gal) in response to hormone-active chemicals were used as biosensors.
- A microfluidic device integrated with interdigitated array (IDA) electrodes was designed for enhanced sensitivity.
- Electrophoresis was employed to trap yeast cells in the analytical chamber for electrochemical detection of beta-gal activity.
Main Results:
- The microfluidic device successfully detected electrochemical signals from beta-gal produced by yeast exposed to 17beta-estradiol (E2).
- The device demonstrated high sensitivity in detecting hormone-active chemicals.
- The system also successfully detected the inhibitory effects of antagonists like tamoxifen.
Conclusions:
- The developed microfluidic device offers a highly sensitive and portable platform for detecting hormone-active chemicals.
- This technology has potential applications in environmental monitoring and toxicological assessments.
- The integration of genetically engineered yeast biosensors with electrochemical detection provides a robust analytical tool.
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