@article{0fa5f0a875a446298b4c45e606b51543,
title = "Myeloid antigen-presenting cell niches sustain antitumor T cells and license PD-1 blockade via CD28 costimulation",
abstract = "The mechanisms regulating exhaustion of tumor-infiltrating lymphocytes (TIL) and responsiveness to PD-1 blockade remain partly unknown. In human ovarian cancer, we show that tumor-specific CD8+ TIL accumulate in tumor islets, where they engage antigen and upregulate PD-1, which restrains their functions. Intraepithelial PD-1+CD8+ TIL can be, however, polyfunctional. PD-1+ TIL indeed exhibit a continuum of exhaustion states, with variable levels of CD28 costimulation, which is provided by antigen-presenting cells (APC) in intraepithelial tumor myeloid niches. CD28 costimulation is associated with improved effector fitness of exhausted CD8+ TIL and is required for their activation upon PD-1 blockade, which also requires tumor myeloid APC. Exhausted TIL lacking proper CD28 costimulation in situ fail to respond to PD-1 blockade, and their response may be rescued by local CTLA-4 blockade and tumor APC stimulation via CD40L.",
keywords = "CD28, CD40, CTLA-4, dendritic cell, exhaustion, myeloid niche, ovarian, PD-1, TIL, tumor",
author = "Jaikumar Duraiswamy and Riccardo Turrini and Aspram Minasyan and David Barras and Isaac Crespo and Grimm, {Aliz{\'e}e J.} and Julia Casado and Raphael Genolet and Fabrizio Benedetti and Alexandre Wicky and Kalliopi Ioannidou and Wilson Castro and Christopher Neal and Amandine Moriot and St{\'e}phanie Renaud-Tissot and Victor Anstett and No{\'e}mie Fahr and Tanyi, {Janos L.} and Eiva, {Monika A.} and Jacobson, {Connor A.} and Montone, {Kathleen T.} and Westergaard, {Marie Christine Wulff} and Svane, {Inge Marie} and Kandalaft, {Lana E.} and Mauro Delorenzi and Sorger, {Peter K.} and Anniina F{\"a}rkkil{\"a} and Olivier Michielin and Vincent Zoete and Carmona, {Santiago J.} and Foukas, {Periklis G.} and Powell, {Daniel J.} and Sylvie Rusakiewicz and Doucey, {Marie Agn{\`e}s} and {Dangaj Laniti}, Denarda and George Coukos",
note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Inc.",
year = "2021",
month = dec,
day = "13",
doi = "10.1016/j.ccell.2021.10.008",
language = "English",
volume = "39",
pages = "1623--1642.e20",
journal = "Cancer Cell",
issn = "1535-6108",
publisher = "Cell Press",
number = "12",
}