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Updated: Sep 15, 2025
Tumor Transplantation for Assessing the Dynamics of Tumor-Infiltrating CD8+ T Cells in Mice
Published on: June 12, 2021
Simulating CD8 T cell exhaustion: A comprehensive approach
Andrea J Manrique-Rincón1,2,3, Ben Foster1,3, Stuart Horswell2,3
1Cambridge Institute of Therapeutic Immunology and Infectious Disease, University of Cambridge, Cambridge, UK.
Abstract:
Immunotherapy has transformed cancer treatment but benefits only some patients, and predictive biomarkers are lacking. One correlate of response is the reinvigoration of a subset of CD8 T cells that have an exhausted phenotype and impaired functionality. To develop effective therapies, reproducible models are required to identify candidate target genes that enable reversal of T cell exhaustion. Here, we describe an in vitro model by chronically stimulating T cells with their cognate antigen, followed by temporal phenotypic characterization. This model recapitulates many critical hallmarks of exhaustion, including expression of canonical surface markers, impaired proliferation, reduced cytokine production, decreased cytotoxic granule release, and metabolic alterations. Two in vivo models validate these results and establish a gene signature shared by in vitro and in vivo exhausted states. Critically, this signature is observed in tumor infiltrating T cells from multiple human tumor types, validating the translational potential of this model for discovering therapies.
Insights
Researchers developed a new model to study T cell exhaustion in cancer immunotherapy. This model helps identify genes to reverse T cell exhaustion and improve patient treatment outcomes.
Area of Science:
- Immunology
- Cancer Biology
- T cell biology
Background:
- Immunotherapy has revolutionized cancer treatment but lacks predictive biomarkers for patient response.
- A subset of CD8 T cells exhibits an exhausted phenotype, impairing anti-tumor immunity.
Purpose of the Study:
- To develop reproducible models for identifying therapeutic targets to reverse T cell exhaustion.
- To characterize the hallmarks of T cell exhaustion and discover a shared gene signature.
Main Methods:
- Development of an in vitro model using chronic antigen stimulation of T cells.
- Temporal phenotypic characterization of T cells in vitro and validation in vivo models.
- Identification of a gene signature associated with exhausted T cell states.
Main Results:
- The in vitro model recapitulates key features of T cell exhaustion, including impaired function and altered metabolism.
- A shared gene signature was identified between in vitro and in vivo exhausted T cells.
- This gene signature is present in tumor-infiltrating T cells from various human cancers.
Conclusions:
- The developed model is a valuable tool for discovering novel therapies to overcome T cell exhaustion.
- The identified gene signature holds translational potential for improving cancer immunotherapy efficacy.
