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Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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A Microfluidic Platform for Screening Gene Expression Dynamics across Yeast Strain Libraries.

Elizabeth Stasiowski1, Richard O'Laughlin1, Shayna Holness2

  • 1Department of Bioengineering, University of California San Diego, La Jolla, CA, USA.

Bio-Protocol
|November 29, 2023
PubMed
Summary

Researchers developed a new microfluidic platform for high-throughput screening of yeast (Saccharomyces cerevisiae) genetic libraries. This method enables dynamic gene expression analysis in up to 48 strains simultaneously, overcoming limitations of traditional assays.

Keywords:
Gene expression dynamicsHigh-throughput screeningMicrofabricationMicrofluidicsProtein aggregationSaccharomyces cerevisiaeYeastYeast library

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Area of Science:

  • Molecular Biology
  • Biotechnology
  • Microfluidics

Background:

  • Saccharomyces cerevisiae is a key model organism due to its ease of genetic manipulation.
  • High-throughput screening of yeast strain libraries has advanced understanding of gene function.
  • Traditional screening methods struggle to analyze dynamic gene expression changes over time.

Purpose of the Study:

  • To develop a novel microfluidic platform for high-throughput, dynamic screening of yeast genetic libraries.
  • To enable the analysis of gene expression dynamics in multiple yeast strains concurrently.
  • To overcome the throughput limitations of existing microfluidic and traditional screening techniques.

Main Methods:

  • Fabrication of polydimethylsiloxane (PDMS) microfluidic devices using photolithography and soft lithography.
  • Development of a microfluidic platform integrating an array pinning robot for strain transfer.
  • Robotic arraying of up to 48 distinct yeast strains onto a single microfluidic device for experimentation.

Main Results:

  • A validated methodology for constructing and setting up the microfluidic device is detailed.
  • The platform successfully enabled dynamic screening of a protein aggregation library.
  • The system allows for the simultaneous transfer and analysis of multiple yeast strains.

Conclusions:

  • The developed microfluidic platform enhances the capacity for high-throughput, dynamic screening of yeast libraries.
  • This methodology offers a powerful tool for studying gene expression dynamics across various applications.
  • The integration of microfluidics and robotic arraying significantly advances yeast-based genetic research.