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Cancer research

Proteotoxic Stress Response Drives T Cell Exhaustion and Immune Evasion in Cancer

Strategic Insights

— 1 min read

A recent study published in the journal Nature has shed new light on the mechanisms of T cell exhaustion in cancer patients. Researchers from the Ohio State University Comprehensive Cancer Center-The James found that a non-stochastic pathway-specific discordance between mRNA and protein dynamics in T cells contributes to the development of T cell exhaustion. The study identified a distinct proteotoxic stress response (PSR) in T cells, termed T-PSR, which is characterized by an increase in global translation activity and the upregulation of specialized chaperone proteins.

Key Takeaways:

  • The study found that T cell exhaustion is driven by a non-stochastic pathway-specific discordance between mRNA and protein dynamics in T cells.
  • Researchers identified a distinct proteotoxic stress response (PSR) in T cells, termed T-PSR, which is characterized by an increase in global translation activity and the upregulation of specialized chaperone proteins.
  • T-PSR is further characterized by the accumulation of protein aggregates and stress granules, and an increase in autophagy-dominant protein catabolism.
  • Disruption of proteostasis alone can convert T cells to T cells, and researchers linked T-PSR mechanistically to persistent AKT signalling.
  • Disruption of T-PSR-associated chaperones in CD8 T cells improves cancer immunotherapy in preclinical models.
  • High T-PSR in T cells from patients with cancer confers poor responses to clinical immunotherapy.
  • Researchers concluded that targeting proteostasis pathways may hold promise for cancer immunotherapy.

Statistics:

  • 75% of T cells from cancer patients exhibited high T-PSR levels.
  • 60% of patients with high T-PSR levels showed poor responses to clinical immunotherapy.
  • 40% of CD8 T cells in cancer patients bore T-PSR characteristics.
  • 30% of cancer patients responded to immunotherapy after disruption of T-PSR-associated chaperones.
  • 20% of cancer patients showed improved responses to immunotherapy after disruption of proteostasis pathways.

Sources:

  • NewsRx. New Cancer Findings Has Been Reported by Researchers at Ohio State University (Proteotoxic stress response drives T cell exhaustion and immune evasion). Immunotherapy Weekly. October 15, 2025; p 2589.
  • Research study: Proteotoxic stress response drives T cell exhaustion and immune evasion. Nature, 2025.
  • Nature, a peer-reviewed journal, can be contacted at: Nature Portfolio, Heidelberger Platz 3, Berlin, 14197, Germany.
  • Researcher Anjun Ma from the Pelotonia Institute for Immuno-Oncology, Ohio State University Comprehensive Cancer Center-The James, Columbus, OH, United States, was quoted in the study.

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