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INVITED ARTICLE: IMUNOTHERAPY

Rationale for combination of radiation therapy and immune checkpoint blockers to improve cancer treatment

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Pages 9-20 | Received 17 Mar 2018, Accepted 26 Nov 2018, Published online: 11 Jan 2019
 

Abstract

Radiation therapy for cancer is considered to be immunosuppressive. However, the cellular response after radiation therapy may stimulate or suppress an immune response. The effect may vary with the tumor type and occasionally tumor regressions have been observed outside the irradiated volume, both in animal studies and in the clinic. A renewed interest in the role of immunity for the observed effect of radiation came with the current recognized role of immune checkpoint blockers (ICBs) for control of selected cancer types. We therefore here review preclinical studies and clinical reports on the interaction of ICBs and radiation as a basis for further clinical trials. Some tumor types where the combination of these modalities seems especially promising are also proposed.

Disclosure statement

No potential conflict of interest was reported by the authors. Supported by Bergen Medical Foundation (Jon Espen Dale research fellow grant).

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