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Related Experiment Video

Updated: Jan 15, 2026

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Single-Cell Clonal Lineage Tracing Identifies the Transcriptional Program Controlling the Cell-Fate Decisions by

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  • 1Department of Immunology, University of Texas Southwestern Medical Center, Dallas, Texas.

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Summary

Understanding how neoantigen-specific T cells differentiate is key for cancer immunotherapy. This study reveals a transcriptional program guiding T cell fate, impacting tumor infiltration and patient response to treatment.

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Area of Science:

  • Immunology
  • Cancer Biology
  • Transcriptomics

Background:

  • Neoantigen-specific T cells are crucial for effective cancer immunotherapy.
  • The transcriptional control of their differentiation and fate decisions remains poorly understood.

Purpose of the Study:

  • To map the clonal expansion and differentiation of neoantigen-specific CD8+ T cells in mouse prostate cancer.
  • To identify the transcriptional programs governing T cell fate and their correlation with clinical outcomes.

Main Methods:

  • Joint single-cell transcriptome and T-cell receptor profiling in mouse models.
  • Analysis of T cell subsets (TSCM, TPEX, TEX) in tumor and draining lymph nodes.
  • Correlation of T cell differentiation signatures with patient responses to immune checkpoint inhibitors.

Main Results:

  • Neoantigen-specific CD8+ T cells in tumors showed increased activation and exhaustion signatures.
  • Distinct T cell subsets (TSCM, TPEX, TEX) were identified in lymph nodes, with TPEX as a likely differentiation root.
  • Balanced T cell differentiation correlated with greater expansion, while bias towards TEX predicted poorer immunotherapy response.

Conclusions:

  • A transcriptional program controlling neoantigen-specific CD8+ T cell fate has been identified.
  • T cell differentiation patterns in lymph nodes correlate with tumor infiltration and patient response to immune checkpoint inhibitors.
  • This understanding may inform strategies to improve cancer immunotherapy efficacy.