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Related Experiment Video

Updated: Aug 7, 2025

Author Spotlight: Characterization of Low-Affinity Protein Interactions in Solution Using MassFluidix Technology
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Label-Free Multiplexed Microfluidic Analysis of Protein Interactions Based on Photonic Crystal Surface Mode Imaging.

Galina Nifontova1, Irina Petrova2, Evgeniia Gerasimovich2

  • 1Laboratoire de Recherche en Nanosciences, LRN-EA4682, Structure Fédérative de Recherche Cap Santé, UFR de Pharmacie, Université de Reims Champagne-Ardenne, 51100 Reims, France.

International Journal of Molecular Sciences
|March 11, 2023
PubMed
Summary

Photonic crystal surface mode (PC SM) imaging offers a sensitive, label-free method for detecting multiple protein interactions simultaneously. This advanced biosensor technology is ideal for high-throughput protein analysis in diagnostics and drug discovery.

Keywords:
immunoassaylabel-free biosensingmultiplexed detectionphotonic crystal surface mode imagingprotein array

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Biochemistry

Background:

  • High-throughput protein assays are vital for diagnostics, drug discovery, and proteomics.
  • Conventional surface plasmon resonance (SPR) imaging has limitations in sensitivity and multiplexing.
  • Photonic crystal surface mode (PC SM) imaging presents a promising label-free alternative.

Purpose of the Study:

  • To develop and validate a label-free protein biosensing assay using PC SM imaging in a microfluidic format.
  • To demonstrate the feasibility of simultaneous, real-time detection of multiple protein interactions.
  • To establish PC SM imaging as a sensitive platform for multiplexed biomolecular analysis.

Main Methods:

  • Design of a microfluidic system for PC SM imaging.
  • Preparation of 96-point microarrays of various model proteins using automated spotting.
  • Real-time, label-free detection and imaging of protein binding events.
  • Utilizing PC SM imaging's enhanced sensitivity compared to SPR imaging.

Main Results:

  • Successful implementation of label-free, real-time detection of protein interactions using PC SM imaging.
  • Demonstrated feasibility of simultaneous detection of multiple protein binding events in a 96-well format.
  • Achieved high sensitivity attributed to PC SM sensors' longer signal propagation.

Conclusions:

  • PC SM imaging provides a sensitive and reproducible method for multiplexed protein interaction analysis.
  • The developed microfluidic PC SM imaging assay is suitable for high-throughput screening.
  • This technology holds significant potential for advancing label-free diagnostics and drug discovery platforms.