The narrow path to CD8(+) T cell recognition of mutant p53.

Distinct barriers to processing, presentation, and recognition of mutant p53 neoantigens limit CD8(+) T cell responses in cancer.

• Why it matters: Understanding why shared driver mutations like mutant p53 are not effectively targeted by T cells is crucial for improving cancer immunotherapy strategies and overcoming immune evasion.
• What they did: Haratani et al. identified specific obstacles in the processing, presentation, and recognition pathways that hinder CD8(+) T cell detection of neoantigens derived from mutant p53.
• The result: These findings reveal key immune evasion mechanisms and suggest potential targets to enhance T cell recognition of mutant p53, advancing efforts to develop effective immunotherapies.