Tumor-associated antigen presented by major histocompatibility complex class I molecule

Tumor-associated antigens presented via major histocompatibility complex class I molecules play a central role in anti-tumor immunity. Their presence enables effective recognition and elimination of malignant cells by cytotoxic T lymphocytes. However, many tumors develop mechanisms—such as downregulation/loss-of-function mutations—that impair this pathway as a means to evade immune destruction. Restoring or enhancing this pathway remains an important focus both for improving patient prognosis and increasing responsiveness to modern immunotherapies such as checkpoint blockade agents.

Upregulation of MHC-I expression, enhancement of antigen processing and presentation, restoration of T cell recognition