Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma

Glioblastoma is the most common adult primary brain tumor and carries a dismal prognosis. Radiation is a standard first-line therapy, typically deployed following maximal safe surgical debulking, when possible, in combination with cytotoxic chemotherapy. For other systemic cancers, standard of care...

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Main Authors: Karishma R. Rajani, Lucas P. Carlstrom, Ian F. Parney, Aaron J. Johnson, Arthur E. Warrington, Terry C. Burns
Format: Article
Language:English
Published: Frontiers Media S.A. 2019-02-01
Series:Frontiers in Oncology
Subjects:
Online Access:https://www.frontiersin.org/article/10.3389/fonc.2018.00656/full
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author Karishma R. Rajani
Lucas P. Carlstrom
Ian F. Parney
Aaron J. Johnson
Arthur E. Warrington
Terry C. Burns
author_facet Karishma R. Rajani
Lucas P. Carlstrom
Ian F. Parney
Aaron J. Johnson
Arthur E. Warrington
Terry C. Burns
author_sort Karishma R. Rajani
collection DOAJ
description Glioblastoma is the most common adult primary brain tumor and carries a dismal prognosis. Radiation is a standard first-line therapy, typically deployed following maximal safe surgical debulking, when possible, in combination with cytotoxic chemotherapy. For other systemic cancers, standard of care is being transformed by immunotherapies, including checkpoint-blocking antibodies targeting CTLA-4 and PD-1/PD-L1, with potential for long-term remission. Ongoing studies are evaluating the role of immunotherapies for GBM. Despite dramatic responses in some cases, randomized trials to date have not met primary outcomes. Challenges have been attributed in part to the immunologically “cold” nature of glioblastoma relative to other malignancies successfully treated with immunotherapy. Radiation may serve as a mechanism to improve tumor immunogenicity. In this review, we critically evaluate current evidence regarding radiation as a synergistic facilitator of immunotherapies through modulation of both the innate and adaptive immune milieu. Although current preclinical data encourage efforts to harness synergistic biology between radiation and immunotherapy, several practical and scientific challenges remain. Moreover, insights from radiation biology may unveil additional novel opportunities to help mobilize immunity against GBM.
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spelling doaj.art-07e9ee7b48d64e3cb1db511d87b0cea32022-12-21T16:58:27ZengFrontiers Media S.A.Frontiers in Oncology2234-943X2019-02-01810.3389/fonc.2018.00656429617Harnessing Radiation Biology to Augment Immunotherapy for GlioblastomaKarishma R. Rajani0Lucas P. Carlstrom1Ian F. Parney2Aaron J. Johnson3Arthur E. Warrington4Terry C. Burns5Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, United StatesDepartment of Neurologic Surgery, Mayo Clinic, Rochester, MN, United StatesDepartment of Neurologic Surgery, Mayo Clinic, Rochester, MN, United StatesDepartment of Immunology, Mayo Clinic, Rochester, MN, United StatesDepartment of Neurologic Surgery, Mayo Clinic, Rochester, MN, United StatesDepartment of Neurologic Surgery, Mayo Clinic, Rochester, MN, United StatesGlioblastoma is the most common adult primary brain tumor and carries a dismal prognosis. Radiation is a standard first-line therapy, typically deployed following maximal safe surgical debulking, when possible, in combination with cytotoxic chemotherapy. For other systemic cancers, standard of care is being transformed by immunotherapies, including checkpoint-blocking antibodies targeting CTLA-4 and PD-1/PD-L1, with potential for long-term remission. Ongoing studies are evaluating the role of immunotherapies for GBM. Despite dramatic responses in some cases, randomized trials to date have not met primary outcomes. Challenges have been attributed in part to the immunologically “cold” nature of glioblastoma relative to other malignancies successfully treated with immunotherapy. Radiation may serve as a mechanism to improve tumor immunogenicity. In this review, we critically evaluate current evidence regarding radiation as a synergistic facilitator of immunotherapies through modulation of both the innate and adaptive immune milieu. Although current preclinical data encourage efforts to harness synergistic biology between radiation and immunotherapy, several practical and scientific challenges remain. Moreover, insights from radiation biology may unveil additional novel opportunities to help mobilize immunity against GBM.https://www.frontiersin.org/article/10.3389/fonc.2018.00656/fullradiationglioblastomaGBMPD-1/PD-L1CTLA-4immunotherapies
spellingShingle Karishma R. Rajani
Lucas P. Carlstrom
Ian F. Parney
Aaron J. Johnson
Arthur E. Warrington
Terry C. Burns
Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma
Frontiers in Oncology
radiation
glioblastoma
GBM
PD-1/PD-L1
CTLA-4
immunotherapies
title Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma
title_full Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma
title_fullStr Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma
title_full_unstemmed Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma
title_short Harnessing Radiation Biology to Augment Immunotherapy for Glioblastoma
title_sort harnessing radiation biology to augment immunotherapy for glioblastoma
topic radiation
glioblastoma
GBM
PD-1/PD-L1
CTLA-4
immunotherapies
url https://www.frontiersin.org/article/10.3389/fonc.2018.00656/full
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