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Related Experiment Video

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Real-time Live Imaging of T-cell Signaling Complex Formation
10:31

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Published on: June 23, 2013

Visualisation of signalling in immune cells.

Leo M Carlin1, Konstantina Makrogianneli, Melanie Keppler

  • 1Cancer Studies Division/Randall Division of Cellular and Molecular Biophysics, Richard Dimbleby Department of Cancer Research, Guy's Medical School Campus, King's College London, London, UK.

Methods in Molecular Biology (Clifton, N.J.)
|April 10, 2010
PubMed
Summary

This study details Förster resonance energy transfer (FRET) biosensors for visualizing protein interactions in immune cells. Improved probes and protocols enable detailed analysis of signaling dynamics in T and NK cells.

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Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Investigating the immune system involves diverse techniques, from whole-organism studies to single-cell molecular analyses.
  • Förster resonance energy transfer (FRET) is a well-established technique for studying protein-protein interactions in live cells, particularly in receptor signaling pathways.
  • Various FRET biosensors exist to visualize cellular processes and the localization of signaling molecules.

Purpose of the Study:

  • To focus on single-cell and molecular techniques for examining cell-cell interactions.
  • To present improved FRET biosensors (Raichu variants) for Rho, Rac, and Cdc42 proteins.
  • To demonstrate the application of these biosensors in analyzing signaling dynamics within T and NK cells.

Main Methods:

  • Development of enhanced FRET biosensors with improved fluorophore combinations for Fluorescence-Lifetime Imaging Microscopy (FLIM).
  • Utilizing modified Rho, Rac, and Cdc42 Raichu probes.
  • Application in various assays to determine signal dynamics in T and NK cells.

Main Results:

  • Demonstrated the utility of enhanced FRET biosensors for visualizing protein interactions involved in cellular signaling.
  • Successfully applied the probes to analyze signal dynamics in T and NK cells.
  • Provided specific protocols and technical notes for using these advanced FRET probes.

Conclusions:

  • Enhanced FRET biosensors offer powerful tools for dissecting molecular mechanisms in immune cell signaling.
  • The described Raichu probe variants and protocols facilitate detailed studies of T and NK cell activation.
  • This approach advances the understanding of protein-protein interactions critical for immune cell function.