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High-throughput Protein Expression Generator Using a Microfluidic Platform
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An off-the-shelf integrated microfluidic device comprising self-assembled monolayers for protein array experiments.

Mirit Hen1, Maria Ronen2, Alex Deitch2

  • 1Chemistry Department and Institute of Nanotechnology and Advanced Materials, Bar Ilan University , Ramat Gan 5290002, Israel.

Biomicrofluidics
|October 1, 2015
PubMed
Summary

This study integrates surface functionalization into microfluidic device fabrication, simplifying protein array experiments. This novel method enhances sensitivity and specificity for broader technology adoption.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Analytical Chemistry

Background:

  • Microfluidic protein arrays offer enhanced sensitivity and specificity for life science applications.
  • A key limitation is the repetitive and time-consuming surface functionalization required for protein immobilization in each experiment.

Purpose of the Study:

  • To develop an integrated surface functionalization process within microfluidic device fabrication.
  • To eliminate the need for pre-experiment surface modification in microfluidic protein array assays.

Main Methods:

  • Utilized self-assembled monolayers (SAMs) for biomolecule immobilization within polydimethylsiloxane (PDMS) microfluidic channels.
  • Developed PDMS-compatible conditions for siloxane-anchored SAM deposition (1-undecyl-thioacetate-trichlorosilane) and functional group activation.
  • Demonstrated covalent antibody conjugation to the SAM within the microfluidic channel.

Main Results:

  • Successfully created a functionalized microfluidic device with immobilized antibodies capable of antigen binding.
  • Achieved a high signal-to-background ratio in antigen-antibody binding assays.
  • Confirmed antibody activity remained stable after one week of device storage.

Conclusions:

  • Integrating surface chemistry into microfluidic device fabrication simplifies and accelerates experimental workflows.
  • This approach has the potential to significantly broaden the accessibility and application of microfluidic protein array technology.