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Study Identifies Early Epigenetic 'Big Bang' of Immune Escape in Bowel Cancer

The finding suggests epigenetic changes that blunt neoantigens could help flag which patients benefit from immunotherapy.

Overview

  • Researchers from the Institute of Cancer Research, Human Technopole and Chalmers report the results in Nature Genetics on November 5, 2025.
  • Multi-omic profiling of 29 colorectal tumors showed an early immune-escape event that largely fixes how the cancer interacts with the immune system as it grows.
  • The team links immune evasion to epigenetic alterations that reduce neoantigen expression, making tumor cells less visible to immune surveillance.
  • The authors propose using these signals to stratify patients for immunotherapy and to test pairing immunotherapy with epigenome‑modifying drugs to boost neoantigen display.
  • The work is a discovery-stage finding that needs larger validation and clinical trials before practice changes, while several bowel cancer vaccines are already in trials.