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Padilla O, Minns HE, Wei HJ, Fan W, Webster-Carrion A, Tazhibi M, McQuillan NM, Zhang X, Gallitto M, Yeh R, Zhang Z, Hei TK, Szalontay L, Pavisic J, Tan Y, Deoli N, Garty G, Garvin JH, Canoll PD, Vanpouille-Box C, Menon V, Olah M, Rabadan R, Wu CC, Gartrell RD. Immune Response following FLASH and Conventional Radiation in Diffuse Midline Glioma. Int J Radiat Oncol Biol Phys 2024:S0360-3016(24)00300-6. [PMID: 38364947 DOI: 10.1016/j.ijrobp.2024.01.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/15/2024] [Accepted: 01/28/2024] [Indexed: 02/18/2024]
Abstract
PURPOSE Diffuse midline glioma (DMG) is a fatal tumor traditionally treated with radiation therapy (RT) and previously characterized as having a noninflammatory tumor immune microenvironment (TIME). FLASH is a novel RT technique using ultra-high dose rate that is associated with decreased toxicity and effective tumor control. However, the effect of FLASH and conventional (CONV) RT on the DMG TIME has not yet been explored. METHODS AND MATERIALS Here, we performed single-cell RNA sequencing (scRNA-seq) and flow cytometry on immune cells isolated from an orthotopic syngeneic murine model of brainstem DMG after the use of FLASH (90 Gy/sec) or CONV (2 Gy/min) dose-rate RT and compared to unirradiated tumor (SHAM). RESULTS At day 4 post-RT, FLASH exerted similar effects as CONV in the predominant microglial (MG) population, including the presence of two activated subtypes. However, at day 10 post-RT, we observed a significant increase in the type 1 interferon α/β receptor (IFNAR+) in MG in CONV and SHAM compared to FLASH. In the non-resident myeloid clusters of macrophages (MACs) and dendritic cells (DCs), we found increased type 1 interferon (IFN1) pathway enrichment for CONV compared to FLASH and SHAM by scRNA-seq. We observed this trend by flow cytometry at day 4 post-RT in IFNAR+ MACs and DCs, which equalized by day 10 post-RT. DMG control and murine survival were equivalent between RT dose rates. CONCLUSIONS Our work is the first to map CONV and FLASH immune alterations of the DMG TIME with single-cell resolution. Although DMG tumor control and survival were similar between CONV and FLASH, we found that changes in immune compartments differed over time. Importantly, although both RT modalities increased IFN1, we found that the timing of this response was cell-type and dose-rate dependent. These temporal differences, particularly in the context of tumor control, warrant further study.
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Affiliation(s)
- Oscar Padilla
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York; Department of Radiation Oncology, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Hanna E Minns
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York; Oregon Health and Science University School of Medicine, Portland, Oregon
| | - Hong-Jian Wei
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Weijia Fan
- Mailman School of Public Health, Columbia University, New York, New York
| | | | - Masih Tazhibi
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Nicholas M McQuillan
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Xu Zhang
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York; Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, New York; Department of Genetics and Development, Columbia University Irving Medical Center, New York, New York
| | - Matthew Gallitto
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Rebecca Yeh
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Zhiguo Zhang
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York; Institute for Cancer Genetics, Columbia University Irving Medical Center, New York, New York; Department of Genetics and Development, Columbia University Irving Medical Center, New York, New York
| | - Tom K Hei
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York; Center for Radiological Research, Columbia University Irving Medical Center, New York, New York
| | - Luca Szalontay
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Jovana Pavisic
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Yuewen Tan
- Radiological Research Accelerator Facility, Columbia University Irving Medical Center, Irvington, New York
| | - Naresh Deoli
- Radiological Research Accelerator Facility, Columbia University Irving Medical Center, Irvington, New York
| | - Guy Garty
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York; Center for Radiological Research, Columbia University Irving Medical Center, New York, New York; Radiological Research Accelerator Facility, Columbia University Irving Medical Center, Irvington, New York
| | - James H Garvin
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York
| | - Peter D Canoll
- Department of Pathology and Cell Biology, Columbia University Irving Medical Center, New York, New York
| | | | - Vilas Menon
- Department of Neurology, Columbia University Irving Medical Center, New York, New York; Center for Translational and Computational Neuroimmunology, Columbia University Irving Medical Center, New York, New York; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, New York
| | - Marta Olah
- Department of Neurology, Columbia University Irving Medical Center, New York, New York; Taub Institute for Research on Alzheimer's Disease and the Aging Brain, Columbia University Irving Medical Center, New York, New York
| | - Raul Rabadan
- Department of Systems Biology, Columbia University Irving Medical Center, New York, New York; Department of Biomedical Informatics, Columbia University Irving Medical Center, New York, New York; Program for Mathematical Genomics, Columbia University Irving Medical Center, New York, New York
| | - Cheng-Chia Wu
- Department of Radiation Oncology, Columbia University Irving Medical Center, New York, New York
| | - Robyn D Gartrell
- Department of Pediatrics, Columbia University Irving Medical Center, New York, New York; Department of Oncology, Division of Pediatric Oncology, Johns Hopkins School of Medicine, Baltimore, Maryland.
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