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Engineering Mesoscale T Cell Receptor Clustering by Plug-and-Play Nanotools
M Florencia Sánchez1, Sevi Faria1, Stefan Frühschulz1
1Institute of Biochemistry, Biocenter, Goethe University Frankfurt, Max-von-Laue-Str. 9, 60438, Frankfurt am Main, Germany.
Advanced Materials (Deerfield Beach, Fla.)
|June 26, 2024
Summary
T cell receptor (TCR) clustering dynamics differ based on ligand presence. Peptide-loaded major histocompatibility complex (pMHC) induced clustering shows higher density and dynamics than ligand-free clustering.
Area of Science:
- Immunology
- Biophysics
- Molecular Biology
Background:
- T cell receptor (TCR) clustering and immune synapse formation are critical for TCR signaling.
- Limited understanding exists regarding these dynamic assemblies and their link to transmembrane signaling.
Purpose of the Study:
- To investigate T cell receptor (TCR) clustering using controlled nanotools.
- To compare ligand-induced (pMHC) versus ligand-independent TCR assembly.
- To explore how ligand size and architecture influence TCR clustering.
Main Methods:
- Engineered nanotools with irreversible conjugation pairs and peptide-loaded major histocompatibility complex (pMHC) molecules were utilized.
- Streptavidin-binding peptides facilitated anchoring in pre-structured matrices.
- TCR clustering was analyzed in both ligand-induced and ligand-free conditions within confined regions.
Main Results:
- pMHC-induced TCR clustering exhibited higher density and dynamics compared to ligand-free clustering.
- The size and architecture of the pMHC ligand were found to influence TCR assembly dynamics.
- Controlled manipulation of membrane receptor clustering was achieved with high specificity.
Conclusions:
- Ligand engagement significantly impacts the density and dynamics of T cell receptor (TCR) clustering.
- This platform allows for precise control over membrane receptor clustering.
- The findings provide insights into diverse modes of T cell receptor activation.
