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Nat Rev Clin Oncol. 2016 Mar;13(3):143-58. doi: 10.1038/nrclinonc.2015.209. Epub 2015 Nov 24.

Combination cancer immunotherapies tailored to the tumour microenvironment.

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Immunology in Cancer and Infection Laboratory, QIMR Berghofer Medical Research Institute, Herston 4006, Queensland, Australia.
Department of Medicine, Division of Haematology/Oncology, Jonsson Comprehensive Cancer Center at UCLA, Los Angeles, California 90095, USA.
Cancer Immunoregulation and Immunotherapy Laboratory QIMR Berghofer Medical Research Institute, Herston, 4006 Queensland, Australia.


Evidence suggests that cancer immunotherapy will be a major part of the combination treatment plan for many patients with many cancer types in the near future. There are many types of immune processes involving different antitumour and tumour-promoting leucocytes, and tumour cells use many strategies to evade the immune response. The tumour microenvironment can help determine which immune suppressive pathways become activated to restrain antitumour immunity. This includes immune checkpoint receptors on effector T-cells and myeloid cells, and release of inhibitory cytokines and metabolites. Therapeutic approaches that target these pathways, particularly immune-checkpoint receptors, can induce durable antitumour responses in patients with advanced-stage cancers, including melanoma. Nevertheless, many patients do not have a good response to monotherapy approaches and alternative strategies are required to achieve optimal therapeutic benefit. These strategies include eliminating the bulk of tumour cells to provoke tumour-antigen release and antigen-presenting cell (APC) function, using adjuvants to enhance APC function, and using agents that enhance effector-cell activity. In this Review, we discuss the stratification of the tumour microenvironment according to tumour-infiltrating lymphocytes and PD-L1 expression in the tumour, and how this stratification enables the design of optimal combination cancer therapies tailored to target different tumour microenvironments.

[Indexed for MEDLINE]

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