Spatially fractionated GRID radiation potentiates immune-mediated tumor control.

Mathematical model Personalized oncology Spatially fractionated radiotherapy Tumor immune interactions

Journal

Radiation oncology (London, England)
ISSN: 1748-717X
Titre abrégé: Radiat Oncol
Pays: England
ID NLM: 101265111

Informations de publication

Date de publication:
13 Sep 2024
Historique:
received: 06 02 2024
accepted: 26 08 2024
medline: 14 9 2024
pubmed: 14 9 2024
entrez: 13 9 2024
Statut: epublish

Résumé

Tumor-immune interactions shape a developing tumor and its tumor immune microenvironment (TIME) resulting in either well-infiltrated, immunologically inflamed tumor beds, or immune deserts with low levels of infiltration. The pre-treatment immune make-up of the TIME is associated with treatment outcome; immunologically inflamed tumors generally exhibit better responses to radio- and immunotherapy than non-inflamed tumors. However, radiotherapy is known to induce opposing immunological consequences, resulting in both immunostimulatory and inhibitory responses. In fact, it is thought that the radiation-induced tumoricidal immune response is curtailed by subsequent applications of radiation. It is thus conceivable that spatially fractionated radiotherapy (SFRT), administered through GRID blocks (SFRT-GRID) or lattice radiotherapy to create areas of low or high dose exposure, may create protective reservoirs of the tumor immune microenvironment, thereby preserving anti-tumor immune responses that are pivotal for radiation success. We have developed an agent-based model (ABM) of tumor-immune interactions to investigate the immunological consequences and clinical outcomes after In silico simulations suggest that radiation-induced cancer cell death alone is insufficient to clear a tumor with WTRT. However, explicit consideration of radiation-induced anti-tumor immunity synergizes with radiation cytotoxicity to eradicate tumors. Similarly, SFRT-GRID is successful with radiation-induced anti-tumor immunity, and, for some pre-treatment TIME compositions and modeling parameters, SFRT-GRID might be superior to WTRT in providing tumor control. This study demonstrates the pivotal role of the radiation-induced anti-tumor immunity. Prolonged fractionated treatment schedules may counteract early immune recruitment, which may be protected by SFRT-facilitated immune reservoirs. Different biological responses and treatment outcomes are observed based on pre-treatment TIME composition and model parameters. A rigorous analysis and model calibration for different tumor types and immune infiltration states is required before any conclusions can be drawn for clinical translation.

Sections du résumé

BACKGROUND BACKGROUND
Tumor-immune interactions shape a developing tumor and its tumor immune microenvironment (TIME) resulting in either well-infiltrated, immunologically inflamed tumor beds, or immune deserts with low levels of infiltration. The pre-treatment immune make-up of the TIME is associated with treatment outcome; immunologically inflamed tumors generally exhibit better responses to radio- and immunotherapy than non-inflamed tumors. However, radiotherapy is known to induce opposing immunological consequences, resulting in both immunostimulatory and inhibitory responses. In fact, it is thought that the radiation-induced tumoricidal immune response is curtailed by subsequent applications of radiation. It is thus conceivable that spatially fractionated radiotherapy (SFRT), administered through GRID blocks (SFRT-GRID) or lattice radiotherapy to create areas of low or high dose exposure, may create protective reservoirs of the tumor immune microenvironment, thereby preserving anti-tumor immune responses that are pivotal for radiation success.
METHODS METHODS
We have developed an agent-based model (ABM) of tumor-immune interactions to investigate the immunological consequences and clinical outcomes after
RESULTS RESULTS
In silico simulations suggest that radiation-induced cancer cell death alone is insufficient to clear a tumor with WTRT. However, explicit consideration of radiation-induced anti-tumor immunity synergizes with radiation cytotoxicity to eradicate tumors. Similarly, SFRT-GRID is successful with radiation-induced anti-tumor immunity, and, for some pre-treatment TIME compositions and modeling parameters, SFRT-GRID might be superior to WTRT in providing tumor control.
CONCLUSION CONCLUSIONS
This study demonstrates the pivotal role of the radiation-induced anti-tumor immunity. Prolonged fractionated treatment schedules may counteract early immune recruitment, which may be protected by SFRT-facilitated immune reservoirs. Different biological responses and treatment outcomes are observed based on pre-treatment TIME composition and model parameters. A rigorous analysis and model calibration for different tumor types and immune infiltration states is required before any conclusions can be drawn for clinical translation.

Identifiants

pubmed: 39272128
doi: 10.1186/s13014-024-02514-6
pii: 10.1186/s13014-024-02514-6
doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

121

Subventions

Organisme : NIH HHS
ID : U01CA244100
Pays : United States

Informations de copyright

© 2024. The Author(s).

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Auteurs

Rebecca A Bekker (RA)

Department of Integrated Mathematical Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.
Cancer Biology Ph.D. Program, University of South Florida, Tampa, FL, 33612, USA.

Nina Obertopp (N)

Department of Immunology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.
Cancer Biology Ph.D. Program, University of South Florida, Tampa, FL, 33612, USA.

Gage Redler (G)

Department of Radiation Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.

José Penagaricano (J)

Department of Radiation Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.

Jimmy J Caudell (JJ)

Department of Radiation Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.

Kosj Yamoah (K)

Department of Radiation Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.

Shari Pilon-Thomas (S)

Department of Immunology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.

Eduardo G Moros (EG)

Department of Radiation Oncology, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL, 33612, USA.

Heiko Enderling (H)

Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA. henderling@mdanderson.org.
Institute for Data Science in Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA. henderling@mdanderson.org.

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