EBV-Specific Anti-PD1 TCR-T Cells in the Treatment of EBV-Positive NHSCC

Single-Arm Trial of EBV-Specific TCR-T Cells With Anti-PD1 Auto-secreted Element in the Treatment of EBV-Positive Head and Neck Carcinoma

Epstein-Barr virus (EBV) infections is known to be a high-risk factor to induce nasopharyngeal cancers. To date, EBV-related head and neck squamous cell carcinoma (HNSCC) is still a major concern in east Asia, especially in China. Concurrent therapies for HNSCC have limited response rate and high chance of relapse. However, EBV-induced cancers provided an ideal target for T cell-based immunotherapy due to the non-self origins. Engineered T cells bearing a TCR (TCR-T) that can specifically recognize the presented EBV antigen become a viable approach to treat this type of cancer. Though engineered T therapies have been well-recognized in hematological cancers, solid cancer treatment has been a major hurdle due to the immune-suppressive tumor microenvironment. One key mechanism of tumor-elicited suppression is the PDL1-PD1 interaction which induces T cell exhaustion. Therefore, TCR-T cells armed with a PD1 antagonist could further enhance the efficacy of TCR-T in solid cancers.

EBV-Specific Anti-PD1 TCR-T Cells in the Treatment of EBV-Positive NHSCC

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