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Microfluidic platform for characterizing TCR-pMHC interactions.

Max A Stockslager1, Josephine Shaw Bagnall2, Vivian C Hecht2

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

Biomicrofluidics
|December 6, 2017
PubMed
Summary
This summary is machine-generated.

This study introduces a novel microfluidic method to measure T cell receptor (TCR)-peptide-major histocompatibility complex (pMHC) interactions. This high-throughput assay detects specific binding by tracking T cell speed changes, offering a scalable approach for immunology research.

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Area of Science:

  • Immunology
  • Biophysics
  • Microfluidics

Background:

  • T cell receptor (TCR)-peptide-major histocompatibility complex (pMHC) interactions are crucial for adaptive immunity.
  • Current methods for analyzing TCR-pMHC kinetics offer high resolution but suffer from low throughput.
  • There is a need for scalable assays to study these fundamental immune interactions.

Purpose of the Study:

  • To develop and validate a novel microfluidic assay for detecting specific TCR-pMHC interactions.
  • To explore the feasibility of measuring TCR-pMHC binding by assessing T cell speed reduction.
  • To establish a high-throughput method for analyzing T cell-pMHC engagement.

Main Methods:

  • Fabrication of a microfluidic device with immobilized pMHC-coated beads in hydrodynamic traps.
  • Flowing T cells past immobilized beads and measuring changes in cell speed via microscopy.
  • Utilizing model systems including primary CD8+ T cells and Jurkat T cells with specific pMHC or antibody conjugates.

Main Results:

  • Demonstrated the ability to detect specific TCR-pMHC interactions by measuring T cell speed reduction.
  • Validated the microfluidic assay using well-characterized T cell and pMHC systems.
  • Established a proof-of-concept for a fluidic measurement modality to probe receptor-ligand interactions.

Conclusions:

  • The developed microfluidic assay offers a feasible and potentially high-throughput method for studying TCR-pMHC interactions.
  • Measuring T cell speed reduction in a microfluidic device is a viable strategy for detecting specific immune cell-ligand binding.
  • This approach could advance the study of T cell function and immune response dynamics.