Interplay between plasmacytoid dendritic cells and tumor-specific T cells in peripheral blood influences long-term survival in non-small cell lung carcinoma.
Fiche publication
Date publication
août 2022
Journal
Cancer immunology, immunotherapy : CII
Auteurs
Membres identifiés du Cancéropôle Est :
Pr ADOTEVI Olivier, Pr GHIRINGHELLI François, Mme TRUNTZER Caroline, Mme LAHEURTE Caroline
Tous les auteurs :
Laheurte C, Seffar E, Gravelin E, Lecuelle J, Renaudin A, Boullerot L, Malfroy M, Marguier A, Lecoester B, Gaugler B, Saas P, Truntzer C, Ghiringhelli F, Adotevi O
Lien Pubmed
Résumé
Plasmacytoid dendritic cells (pDCs) represent a subset of antigen-presenting cells that play an ambivalent role in cancer immunity. Here, we investigated the clinical significance of circulating pDCs and their interaction with tumor-specific T cell responses in patients with non-small cell lung cancer (NSCLC, n = 126) . The relation between intratumoral pDC signature and immune checkpoint inhibitors efficacy was also evaluated. Patients with NSCLC had low level but activated phenotype pDC compared to healthy donors. In overall population, patients with high level of pDC (pDC) had improved overall survival (OS) compared to patients with pDC, median OS 30.4 versus 20.7 months (P = 0.013). This clinical benefit was only observed in stage I to III patients, but not in metastatic disease. We showed that patients harboring pDC profile had high amount of Th1-diffentiation cytokine interleukin-12 (IL-12) in blood and had functional T cells directed against a broad range of tumor antigens. Furthermore, a high pDC signature in the tumor microenvironment was associated with improved clinical outcome in patients treated with anti-PD-(L)1 therapy. Overall, this study showed that circulating pDC is associated with long-term OS in NSCLC and highlighted the predictive value of intratumor pDC signature in the efficacy of immune checkpoint inhibitors.
Mots clés
Lung cancer, Peripheral blood, Plasmacytoïd dendritic cells, Prognosis, Tumor-specific T cell responses
Référence
Cancer Immunol Immunother. 2022 08 21;: