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PDMS-based microfluidics for proteomic analysis.

Arash Dodge1, Edouard Brunet, Suelin Chen

  • 1Microfluidics, MEMS and Nanostructures Laboratory, ESPCI, 10 rue Vauquelin, 75231, Paris, France.

The Analyst
|September 28, 2006
PubMed
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This study presents a microfluidic device for rapid protein analysis. It integrates separation, selection, and digestion for mass spectrometry identification in under 30 minutes, using nanolitre samples.

Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Microfluidics

Background:

  • Mass spectrometry (MS) based proteomics requires efficient sample preparation.
  • Integrating multiple sample preparation steps on a single platform can improve efficiency and reduce analysis time.

Purpose of the Study:

  • To develop and demonstrate a microfluidic poly(dimethylsiloxane) (PDMS) microdevice for on-line protein separation, selection, and digestion.
  • To enable rapid protein identification by mass spectrometry using minimal sample volumes.

Main Methods:

  • Fabrication of a PDMS microfluidic device with integrated valves and a micropump.
  • On-chip electrophoretic separation and selection of myoglobin from a mixture with bovine serum albumin (BSA).
  • On-chip enzymatic digestion in a rotary micromixer followed by peptide recovery.

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Main Results:

  • Successful isolation and selection of myoglobin from BSA using the microfluidic system.
  • Demonstration of integrated on-line digestion and peptide recovery for mass spectrometry.
  • Achieved complete protein identification from sample injection to MS analysis in under 30 minutes with nanolitre sample volumes.

Conclusions:

  • PDMS microfluidic technology is suitable for integrating complex proteomic sample preparation protocols.
  • The developed system offers a rapid and efficient workflow for on-line protein analysis.
  • This approach has the potential to streamline proteomics workflows for protein identification.