Abstract
T cell-mediated anti-tumor immune responses are gated in part by the relative abundance of cytotoxic T cells (Teffs) and regulatory (Tregs) in the tumor microenvironment (TME) whereby Treg may impair the efficacy of Teffs. Tregs can affect Teff function by direct cell-to-cell contact or by secretion of soluble mediators, consistent with the hypothesis that proximity of Tregs to Teff within tumor tissues may have prognostic significance. Here we used a novel chromogenic multiplex assay to investigate the spatial relationship of these functionally diverse T cell subsets in HPV positive and HPV negative head and neck squamous cell carcinomas (HNSCCs).
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