Deciphering the tumor-infiltrating CD73+ regulatory gammadelta T cell ecosystem associated with poor survival of patients with ovarian cancer
LAFONT, V.; Chabab, G.; Michaud, H.-A.; Dejou, C.; Chauvin, M.; Chepeaux, L.-A.; Glasson, Y.; Boissiere, F.; Lenain, M.; Dume, A.-S.; Sarrant, P.; Chemin, G.; Wadja, P.; Dubois, B.; MacManus, A.; Colombo, P.-E.; Fabbro, M.; Bonnefoy, N.
Show abstract
The ability of tumor cells to overcome immune surveillance is an essential step in tumor development and progression. Among the immune cells playing a role in tumor control, {gamma}{delta} T cells contribute to the immune response against many tumor types through their direct cytotoxic activity against cancer cells and their capacity to regulate the functions of other immune cells. However, their presence in the tumor microenvironment is also associated with poor prognosis, suggesting that {gamma}{delta} T cells may also have pro-tumor activities. We previously described a regulatory {gamma}{delta} T-cell subset that expresses CD73 and produces IL-10, IL-8 and adenosine. Here, we report a higher CD73+ {gamma}{delta} T cell density in the tumor microenvironment of ovarian cancer samples from patients with short-term than long-term survival. Starting from this original observation, we investigated their neighborhood and described a specific ecosystem according to their pro-tumor functions.
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