Tissue biomarkers of immune checkpoint inhibitor therapy

Author:

Davoudi Fatemeh1,Moradi Afshin2,Sadeghirad Habib2,Kulasinghe Arutha2ORCID

Affiliation:

1. Department of Medical Genetics, School of Medicine Ahvaz Jundishapur University of Medical Sciences Ahvaz Iran

2. Frazer Institute, Faculty of Medicine The University of Queensland Brisbane QLD Australia

Abstract

AbstractCancer immunotherapy has been rejuvenated by the growing understanding of the immune system's role in tumor activity over the past two decades. During cancer initiation and progression, tumor cells employ various mechanisms that resemble peripheral immune tolerance to evade the antitumor responses of the immune system. Immune checkpoint molecules are the major mechanism of immune resistance that are exploited by tumor cells to inhibit T‐cell activation and suppress immune responses. The targeting of immune checkpoint pathways has led to substantial improvements in survival rates in a number of solid cancers. However, a lack of understanding of the heterogeneity of the tumor microenvironment (TME) has resulted in inefficient therapy responses. A greater understanding of the TME is needed to identify patients likely to respond, and those that will have resistance to immune checkpoint inhibitors (ICIs). Advancement in spatial single‐cell technologies has allowed deeper insight into the phenotypic and functional diversities of cells in the TME. In this review, we provide an overview of ICI biomarkers and highlight how high‐dimensional spatially resolved, single‐cell approaches provide deep molecular insights into the TME and allow for the discovery of biomarkers of clinical benefit.

Funder

University of Queensland

Publisher

Wiley

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