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Patterning multiplex protein microarrays in a single microfluidic channel.

Tohid Fatanat Didar1, Amir M Foudeh, Maryam Tabrizian

  • 1Department of Biomedical Engineering, McGill University, Montreal, Quebec H3A 2B4, Canada.

Analytical Chemistry
|November 30, 2011
PubMed
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Researchers developed a rapid method to create stable, multiplex protein patterns within microfluidic channels for advanced biosensing. This technique enables durable biofunctional surfaces essential for high-throughput biological assays on Lab on a Chip devices.

Area of Science:

  • Biotechnology
  • Surface Chemistry
  • Microfluidics

Background:

  • Versatile biofunctional surfaces are crucial for Lab on a Chip (LOC) devices in biosensing and microbioreactors.
  • Current methods often lack the speed and multiplexing capability required for advanced applications.

Purpose of the Study:

  • To present a rapid combinatorial approach for creating multiplex protein patterns in a single microfluidic channel.
  • To develop a durable and highly resistant functional interface for microfluidic devices.

Main Methods:

  • Coupling microcontact printing for silanization with (3-Aminopropyl) triethoxysilane (APTES) and microfluidic patterning of antibodies.
  • Characterization using X-ray photoelectron spectroscopy (XPS) and fluorescence microscopy.
  • Demonstration of multiplex immunoassay with five different primary antibodies patterned in a single channel.

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Main Results:

  • Successful covalent attachment of biomolecules to the microchannel surface, creating a durable functional interface.
  • The developed microfluidic platform maintained functionality at high flow rates.
  • Patterned antibody microarrays remained stable at shear stresses up to 50 dyn/cm(2).

Conclusions:

  • The developed method enables rapid creation of multiplex protein patterns in a single microfluidic channel.
  • This approach yields highly resistant multiplex functional surfaces suitable for high-throughput biological assays.
  • The technique advances the design of Lab on a Chip devices for various bioanalytical applications.