June 11, 2026 · Gut · DOI: 10.1136/gutjnl-2025-336834

Dual mechanism of immune escape shapes the genetic and immunogenic landscape of mismatch repair-deficient colorectal tumours

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The authors aim to understand how host immunity influences the genomic architecture and tumor microenvironment of mismatch repair-deficient (MMRd) colorectal cancers. Their findings reveal a dual mechanism of immune escape—immunoediting and local immunosuppression—that allows MMRd tumors to persist despite being immunogenic, highlighting potential therapeutic vulnerabilities for neoantigen-based or immune reactivation strategies.

Helena Xavier-Ferreira, Ana Vilarinho, Bruno Cavadas, José L Costa, Fatima Carneiro, Bauke Ylstra, Noel F de Miranda, Carlos Resende, Jose C Machado

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