Immunologic Consequences of Genomic Instabilities.

Genomic instability influences tumor immune responses differently: mutational instability enhances immunogenicity with neoantigens, while chromosomal instability suppresses immunity via innate immune activation.

• Why it matters: Understanding how distinct genomic alterations affect tumor immunity is crucial for developing effective immunotherapies, as current approaches often overlook these opposing mechanisms.
• What they did: The study reviews the differences between mutational and chromosomal instability, analyzing their roles in shaping tumor immunogenicity and response to immune checkpoint blockade across various cancers.
• The result: Findings suggest that hypermutated tumors with high neoantigen loads respond better to immunotherapy, whereas chromosomal instability promotes immune evasion, highlighting the need for personalized strategies that consider both processes.