RESUMEN
Adoptive cell therapy (ACT) using ex vivo-expanded tumor-infiltrating lymphocytes (TILs) can eliminate or shrink metastatic melanoma, but its long-term efficacy remains limited to a fraction of patients. Using longitudinal samples from 13 patients with metastatic melanoma treated with TIL-ACT in a phase 1 clinical study, we interrogated cellular states within the tumor microenvironment (TME) and their interactions. We performed bulk and single-cell RNA sequencing, whole-exome sequencing, and spatial proteomic analyses in pre- and post-ACT tumor tissues, finding that ACT responders exhibited higher basal tumor cell-intrinsic immunogenicity and mutational burden. Compared with nonresponders, CD8+ TILs exhibited increased cytotoxicity, exhaustion, and costimulation, whereas myeloid cells had increased type I interferon signaling in responders. Cell-cell interaction prediction analyses corroborated by spatial neighborhood analyses revealed that responders had rich baseline intratumoral and stromal tumor-reactive T cell networks with activated myeloid populations. Successful TIL-ACT therapy further reprogrammed the myeloid compartment and increased TIL-myeloid networks. Our systematic target discovery study identifies potential T-myeloid cell network-based biomarkers that could improve patient selection and guide the design of ACT clinical trials.
Asunto(s)
Inmunoterapia Adoptiva , Melanoma , Humanos , Melanoma/genética , Linfocitos Infiltrantes de Tumor/metabolismo , Proteómica , Linfocitos T CD8-positivos/metabolismo , Microambiente TumoralRESUMEN
The year 2018 has been incredibly prolific regarding novelties. Several studies have given impressive results and offer new anticancer perspectives. Immunotherapy is gaining more and more place defining a new standard of care for different types of cancer. In parallel with a new approach combining immunotherapy and chemotherapy that is emerging, new forms of adoptive immunotherapy are on the path of approval by regulatory authorities. At the decision-making level, a large somatic genetic analysis is becoming dominant, whereas the addition of more specific biomarkers is still needed regarding immunotherapy. This article aims to summarize the significant new developments in oncology for 2018 concerning the five most common cancers and adoptive cellular immunotherapy.
L'année 2018 a été extrêmement prolifique en termes de nouveautés. Plusieurs études ont amené des résultats intéressants et offrent de nouvelles perspectives anticancéreuses. L'immunothérapie prend de plus en plus de place définissant un nouveau standard pour le traitement des différents types de cancer. En parallèle d'une nouvelle approche combinant l'immunothérapie et la chimiothérapie qui voit le jour, des nouvelles formes d'immunothérapie adoptive se situent sur la voie d'approbation par les autorités réglementaires. Sur le plan décisionnel, l'analyse génétique somatique large des tumeurs devient prépondérante, alors que l'addition de biomarqueurs plus spécifiques est encore nécessaire concernant l'immunothérapie. Cet article a pour but de résumer les nouveautés majeures survenues en oncologie pour 2018 concernant les cinq cancers les plus fréquents et l'immunothérapie cellulaire adoptive.
