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Updated: Feb 15, 2026

Generation of Human Chimeric Antigen Receptor Regulatory T Cells
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Generation of Human Chimeric Antigen Receptor Regulatory T Cells

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Rewiring T-cell responses to soluble factors with chimeric antigen receptors

ZeNan L Chang1,2, Michael H Lorenzini3, Ximin Chen1

  • 1Department of Chemical and Biomolecular Engineering, University of California, Los Angeles, Los Angeles, California, USA.

Nature Chemical Biology
|January 30, 2018
PubMed

Insights

Researchers engineered chimeric antigen receptor (CAR)-T cells to target soluble ligands, expanding CAR therapy potential. This approach utilizes ligand-mediated dimerization and mechanotransduction for immune cell response tuning.

Area of Science:

  • Immunology
  • Molecular Biology
  • Biotechnology

Background:

  • Chimeric antigen receptor (CAR)-T cell therapy has shown success against B-cell malignancies by targeting surface-bound antigens.
  • Expanding CAR applications to soluble ligands could significantly broaden their therapeutic utility in various diseases.

Purpose of the Study:

  • To engineer CAR-T cells capable of responding to soluble ligands.
  • To investigate the mechanisms underlying CAR signaling in response to soluble ligands.
  • To explore methods for fine-tuning CAR responsiveness to soluble targets.

Main Methods:

  • Engineered CAR-T cells to recognize diverse soluble ligands, including CD19 ectodomain, GFP variants, and transforming growth factor beta (TGF-β).
  • Investigated CAR signaling mechanisms, focusing on ligand-mediated CAR dimerization.
  • Assessed the impact of mechanical coupling between CAR domains on responsiveness.

Main Results:

  • Demonstrated robust CAR-T cell responses to multiple soluble ligands.
  • Established that CAR signaling to soluble ligands depends on ligand-induced CAR dimerization.
  • Showed that CAR responsiveness can be modulated by adjusting mechanical coupling within the CAR structure.

Conclusions:

  • CAR-T cells can be engineered to effectively target soluble ligands, broadening therapeutic potential.
  • CAR signaling to soluble ligands involves mechanotransduction and ligand-mediated dimerization.
  • This study provides a framework for developing CAR-based immunotherapies against diseases involving soluble biomarkers.

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