Marine Fidelle, Conrad Rauber, Carolina Alves Costa Silva, Ai-Ling Tian, Imran Lahmar, Anne-Laure Mallard de La Varende, Liwei Zhao, Cassandra Thelemaque, Isabelle Lebhar, Meriem Messaoudene, Eugenie Pizzato, Roxanne Birebent, Maxime Descartes Mbogning Fonkou, Silvia Zoppi, Anna Reni, Cécile Dalban, Marion Leduc, Gladys Ferrere, Sylvère Durand, Pierre Ly, Aymeric Silvin, Kevin Mulder, Charles-Antoine Dutertre, Florent Ginhoux, Satoru Yonekura, Maria Paula Roberti, Maryam Tidjani-Alou, Safae Terrisse, Jianzhou Chen, Oliver Kepp, Angela Schippers, Norbert Wagner, Javier Suárez-Gosálvez, Sebastian Kobold, Jean-Eudes Fahrner, Corentin Richard, Jacques Bosq, Leonardo Lordello, Giacomo Vitali, Nathalie Galleron, Benoît Quinquis, Emmanuelle Le Chatelier, Lucas Blanchard, Jean-Philippe Girard, Anne Jarry, Nadine Gervois, Emmanuelle Godefroy, Nathalie Labarrière, Ronald Koschny, Romain Daillère, Benjamin Besse, Caroline Truntzer, François Ghiringhelli, Nicolas Coatnoan, Vanessa Mhanna, David Klatzmann, Damien Drubay, Laurence Albiges, Andrew Maltez Thomas, Nicola Segata, François-Xavier Danlos, Aurélien Marabelle, Bertrand Routy, Lisa Derosa, Guido Kroemer, Laurence Zitvogel
Antibiotics (ABX) compromise the efficacy of programmed cell death protein 1 (PD-1) blockade in cancer patients, but the mechanisms underlying their immunosuppressive effects remain unknown. By inducing the down-regulation of mucosal addressin cell adhesion molecule 1 (MAdCAM-1) in the ileum, post-ABX gut recolonization by Enterocloster species drove the emigration of enterotropic α4β7+ CD4+ regulatory T 17 cells into the tumor. These deleterious ABX effects were mimicked by oral gavage of Enterocloster species, by genetic deficiency, or by antibody-mediated neutralization of MAdCAM-1 and its receptor, α4β7 integrin...
June 9, 2023: Science