Presence of the T-cell activation marker OX-40 on tumor infiltrating lymphocytes and draining lymph node cells from patients with melanoma and head and neck cancers*

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Abstract

Background

The OX-40 antigen is a cell surface glycoprotein in the tumor necrosis factor receptor family that is expressed primarily on activated CD4+ T cells. Selective target organ expression of the OX-40 receptor on autoantigen specific T cells has been found in autoimmune disease. In order to evaluate whether OX-40 is expressed on T cells from patients with nodal-draining carcinomas, OX-40 expression was assessed in tumor infiltrating lymphocytes (TILs), draining lymph node cells (DLNCs), and/or peripheral blood lymphocytes (PBLs) of 13 patients with head and neck squamous cell carcinomas and 9 patients with melanomas.

Methods

Cell phenotype was determined by fluorescence cell analysis using a monoclonal antibody to human OX-40, and CD4+ T cell lymphokine production was determined by reverse transcriptase-polymerase chain reaction (RT-PCR).

Results

Expression of the OX-40 receptor was found in as many as 31% of the TILs and as many as 28% of the DLNCs tested. Conversely, no OX-40 expression was found in PBLs. In addition, CD4+ T cells isolated from DLNCs (but not from TILs or PBLs) secreted a Th1 pattern of cytokines (IL-2, gamma Interferon). Co-culture of autologous CD4+ TILs with an MHC class II+ melanoma cell line transfected with OX-40 ligand cDNA resulted in T cell proliferation and in vitro tumor regression.

Conclusions

These findings suggest that OX-40+ CD4+ T cells isolated from tumors and their adjacent draining nodes may represent a tumorspecific population of activated T cells capable of mediating tumor reactivity. These cells may play an exploitable role in future trials of immunotherapy.

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      2019, Trends in Cancer
      Citation Excerpt :

      One promising co-stimulatory molecule is Ox40, which is expressed on the surface of T cells and promotes proliferation, IFNγ production, and memory formation [63]. Expression of Ox40 has been demonstrated on the surface of HNSCC tumor cells and in draining lymph nodes [64], but expression of its ligand (Ox40L) is reduced in the tumor and thus this pathway is rendered ineffective at generating an antitumor immune response [65,66]. Therefore, potential exists to augment the Ox40 pathway in HNSCC with receptor agonists, which are currently being tested in this setting in clinical trials (discussed below).

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    *

    Presented at the 87th Annual Meeting of the American Association for Cancer Research, Washington, DC, April 20–24, 1996.

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