Fiche publication
Date publication
mai 2020
Journal
Nature medicine
Auteurs
Membres identifiés du Cancéropôle Est :
Pr GHIRINGHELLI François
Tous les auteurs :
Roberti MP, Yonekura S, Duong CPM, Picard M, Ferrere G, Tidjani Alou M, Rauber C, Iebba V, Lehmann CHK, Amon L, Dudziak D, Derosa L, Routy B, Flament C, Richard C, Daillère R, Fluckiger A, Van Seuningen I, Chamaillard M, Vincent A, Kourula S, Opolon P, Ly P, Pizzato E, Becharef S, Paillet J, Klein C, Marliot F, Pietrantonio F, Benoist S, Scoazec JY, Dartigues P, Hollebecque A, Malka D, Pagès F, Galon J, Gomperts Boneca I, Lepage P, Ryffel B, Raoult D, Eggermont A, Vanden Berghe T, Ghiringhelli F, Vandenabeele P, Kroemer G, Zitvogel L
Lien Pubmed
Résumé
The prognosis of colon cancer (CC) is dictated by tumor-infiltrating lymphocytes, including follicular helper T (T) cells and the efficacy of chemotherapy-induced immune responses. It remains unclear whether gut microbes contribute to the elicitation of T cell-driven responses. Here, we show that the ileal microbiota dictates tolerogenic versus immunogenic cell death of ileal intestinal epithelial cells (IECs) and the accumulation of T cells in patients with CC and mice. Suppression of IEC apoptosis led to compromised chemotherapy-induced immunosurveillance against CC in mice. Protective immune responses against CC were associated with residence of Bacteroides fragilis and Erysipelotrichaceae in the ileum. In the presence of these commensals, apoptotic ileal IECs elicited PD-1 T cells in an interleukin-1R1- and interleukin-12-dependent manner. The ileal microbiome governed the efficacy of chemotherapy and PD-1 blockade in CC independently of microsatellite instability. These findings demonstrate that immunogenic ileal apoptosis contributes to the prognosis of chemotherapy-treated CC.
Référence
Nat. Med.. 2020 May 25;:
