Open AccessCD8+ T cell states in human cancer: insights from single-cell analysis
Author(s) -
Anne M. van der Leun,
Daniela S. Thommen,
Ton N. Schumacher
Publication year - 2020
Publication title -
nature reviews. cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 19.575
H-Index - 442
eISSN - 1474-1768
pISSN - 1474-175X
DOI - 10.1038/s41568-019-0235-4
Subject(s) - t cell , cd8 , cytotoxic t cell , biology , tumor microenvironment , cell , cancer research , tumour heterogeneity , population , immune system , cancer cell , cancer , immunology , medicine , genetics , in vitro , environmental health
The T cell infiltrates that are formed in human cancers are a modifier of natural disease progression and also determine the probability of clinical response to cancer immunotherapies. Recent technological advances that allow the single-cell analysis of phenotypic and transcriptional states have revealed a vast heterogeneity of intratumoural T cell states, both within and between patients, and the observation of this heterogeneity makes it critical to understand the relationship between individual T cell states and therapy response. This Review covers our current knowledge of the T cell states that are present in human tumours and the role that different T cell populations have been hypothesized to play within the tumour microenvironment, with a particular focus on CD8 + T cells. The three key models that are discussed herein are as follows: (1) the dysfunction of T cells in human cancer is associated with a change in T cell functionality rather than inactivity; (2) antigen recognition in the tumour microenvironment is an important driver of T cell dysfunctionality and the presence of dysfunctional T cells can hence be used as a proxy for the presence of a tumour-reactive T cell compartment; (3) a less dysfunctional population of tumour-reactive T cells may be required to drive a durable response to T cell immune checkpoint blockade.