1
|
Bertho A, Dos Santos M, Braga-Cohen S, Buard V, Paget V, Guipaud O, Tarlet G, Milliat F, François A. Preclinical Model of Stereotactic Ablative Lung Irradiation Using Arc Delivery in the Mouse: Is Fractionation Worthwhile? Front Med (Lausanne) 2022; 8:794324. [PMID: 35004768 PMCID: PMC8739220 DOI: 10.3389/fmed.2021.794324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 12/07/2021] [Indexed: 11/23/2022] Open
Abstract
Lung stereotactic body radiation therapy is characterized by a reduction in target volumes and the use of severely hypofractionated schedules. Preclinical modeling became possible thanks to rodent-dedicated irradiation devices allowing accurate beam collimation and focal lung exposure. Given that a great majority of publications use single dose exposures, the question we asked in this study was as follows: in incremented preclinical models, is it worth using fractionated protocols or should we continue focusing solely on volume limitation? The left lungs of C57BL/6JRj mice were exposed to ionizing radiation using arc therapy and 3 × 3 mm beam collimation. Three-fraction schedules delivered over a period of 1 week were used with 20, 28, 40, and 50 Gy doses per fraction. Lung tissue opacification, global histological damage and the numbers of type II pneumocytes and club cells were assessed 6 months post-exposure, together with the gene expression of several lung cells and inflammation markers. Only the administration of 3 × 40 Gy or 3 × 50 Gy generated focal lung fibrosis after 6 months, with tissue opacification visible by cone beam computed tomography, tissue scarring and consolidation, decreased club cell numbers and a reactive increase in the number of type II pneumocytes. A fractionation schedule using an arc-therapy-delivered three fractions/1 week regimen with 3 × 3 mm beam requires 40 Gy per fraction for lung fibrosis to develop within 6 months, a reasonable time lapse given the mouse lifespan. A comparison with previously published laboratory data suggests that, in this focal lung irradiation configuration, administering a Biological Effective Dose ≥ 1000 Gy should be recommended to obtain lung fibrosis within 6 months. The need for such a high dose per fraction challenges the appropriateness of using preclinical highly focused fractionation schedules in mice.
Collapse
Affiliation(s)
- Annaïg Bertho
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Morgane Dos Santos
- Laboratory of Radiobiology of Accidental Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Sarah Braga-Cohen
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Valérie Buard
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Vincent Paget
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Olivier Guipaud
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Georges Tarlet
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Fabien Milliat
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| | - Agnès François
- Laboratory of Radiobiology of Medical Exposures, Institute for Radioprotection and Nuclear Safety (IRSN), Research Department in Radiobiology and Regenerative Medicine, Fontenay-aux-Roses, France
| |
Collapse
|
2
|
Tang Y, Yuan Q, Zhao C, Xu Y, Zhang Q, Wang L, Sun Z, Cao J, Luo J, Jiao Y. Targeting USP11 may alleviate radiation-induced pulmonary fibrosis by regulating endothelium tight junction. Int J Radiat Biol 2021; 98:30-40. [PMID: 34705600 DOI: 10.1080/09553002.2022.1998711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
PURPOSE Radiation-induced pulmonary fibrosis (RIPF) is a major side effect after radiotherapy for thoracic malignancies. However, rare anti-RIPF therapeutics show definitive effects for treating this disease. Ubiquitin-specific peptidase 11 (USP11) has been reported to promote transforming growth factor β (TGFβ) signaling which plays an essential role underlying RIPF. Herein, we explored the role of USP11 on RIPF. MATERIALS AND METHODS In the present study, USP11-knockout (Usp11-/-) mice were used to explore the effects of USP11 on RIPF. The lung tissue was obtained after receiving 30 Gy X-ray irradiation. The expression of USP11, TGF-β1, and a-SMA was determined by immunohistochemical and Western Blot, respectively. γ-H2AX foci and TUNEL positive cells were detected by fluorescent technique to assess DNA damage and apoptosis. High-throughput proteomic analysis was applied to further explore the related mechanisms. The transwell co-culture method was used to investigate bystander effects in HELF cells induced by irradiated HMEC-1 cells in vitro. RESULTS Here we found that radiation activated USP11 in vivo and in vitro. Our results showed that USP11 deficiency effectively decreased serum TGF-β1 level, suppressed α-SMA expression, and mitigated pulmonary fibrosis. In addition, fewer γ-H2AX foci and decreased apoptotic cells were identified after irradiation in the primary cells isolated from the lungs of Usp11-/- mice. High-throughput proteomics analysis results showed that 22-upregulated and 158-downregulated proteins were identified in the lung tissues of Usp11-/- mice after irradiation. Furthermore, gene set enrichment analysis (GSEA) revealed that USP11 deficiency affects the tight junction signaling pathway. CONCLUSIONS We verified that USP11 deficiency remarkably reinforced tight junction in the endothelial cells and alleviated TGF-β1 to inhibit fibrosis of fibroblast cells. The present study preliminarily showed that USP11-knockout mitigated RIPF via reinforcement endothelial barrier function.
Collapse
Affiliation(s)
- Yiting Tang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Qian Yuan
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Congzhao Zhao
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Ying Xu
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Qi Zhang
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Lili Wang
- Department of Radiotherapy, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Zhiqiang Sun
- Department of Radiotherapy, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Jianping Cao
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| | - Judong Luo
- Department of Radiotherapy, The Affiliated Changzhou No. 2 People's Hospital of Nanjing Medical University, Changzhou, China
| | - Yang Jiao
- State Key Laboratory of Radiation Medicine and Protection, School of Radiation Medicine and Protection, Soochow University, Suzhou, China.,Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions, Suzhou, China
| |
Collapse
|
3
|
Abstract
Radiation-induced lung injury (RILI) is a common complication in cancer patients receiving local thoracic radiation and bone marrow transplantation conditioning. It is divided into early-stage radiation pneumonitis and advanced radiation fibrosis of the lung. This severely hampers the quality of life and survival of cancer patients. Meanwhile, RILI is a major factor limiting radiation doses in clinical practice, which affects the local control of cancer. Unfortunately, the mechanism of RILI is still not well defined, and there are no treatment options available for these patients. In this review we summarize the methods and agents used for the treatment and prevention of RILI, with the aim of increasing understanding of RILI.
Collapse
|
4
|
Bertho A, Dos Santos M, Buard V, Paget V, Guipaud O, Tarlet G, Milliat F, François A. Preclinical Model of Stereotactic Ablative Lung Irradiation Using Arc Delivery in the Mouse: Effect of Beam Size Changes and Dose Effect at Constant Collimation. Int J Radiat Oncol Biol Phys 2020; 107:548-562. [PMID: 32278852 DOI: 10.1016/j.ijrobp.2020.03.011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 03/09/2020] [Accepted: 03/16/2020] [Indexed: 11/25/2022]
Abstract
PURPOSE Stereotactic body radiation therapy is a therapeutic option offered to high surgical risk patients with lung cancer. Focal lung irradiation in mice is a new preclinical model to help understand the development of lung damage in this context. Here we developed a mouse model of lung stereotactic therapy using arc delivery and monitored the development of lung damage while varying the beam size and dose delivered. METHODS AND MATERIALS C57BL/6JRj mice were exposed to 90 Gy focal irradiation on the left lung using 1-mm diameter, 3 × 3 mm2, 7 × 7 mm2, or 10 × 10 mm2 beam collimation for beam size effect and using 3 × 3 mm2 beam collimation delivering 20 to 120 Gy for dose effect. Long-term lung damage was monitored with micro-computed tomography imaging with anatomopathologic and gene expression measurements in the injured patch and the ipsilateral and contralateral lungs. RESULTS Both 1-mm diameter and 3 × 3 mm2 beam collimation allow long-term studies, but only 3-mm beam collimation generates lung fibrosis when delivering 90 Gy. Dose-effect studies with constant 3-mm beam collimation revealed a dose of 60 Gy as the minimum to obtain lung fibrosis 6 months postexposure. Lung fibrosis development was associated with club cell depletion and increased type II pneumocyte numbers. Lung injury developed with ipsilateral and contralateral consequences such as parenchymal thickening and gene expression modifications. CONCLUSIONS Arc therapy allows long-term studies and dose escalation without lethality. In our dose-delivery conditions, dose-effect studies revealed that 3 × 3 mm2 beam collimation to a minimum single dose of 60 Gy enables preclinical models for the assessment of lung injury within a 6-month period. This model of lung tissue fibrosis in a time length compatible with mouse life span may offer good prospects for future mechanistic studies.
Collapse
Affiliation(s)
- Annaïg Bertho
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France
| | - Morgane Dos Santos
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Accidentelles, Fontenay-aux-Roses, France
| | - Valérie Buard
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France
| | - Vincent Paget
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France
| | - Olivier Guipaud
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France
| | - Georges Tarlet
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France
| | - Fabien Milliat
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France
| | - Agnès François
- Institut de Radioprotection et de Sûreté Nucléaire, Service de Recherche en Radiobiologie et en Médecine régénérative, Laboratoire de Radiobiologie des expositions Médicales, Fontenay-aux-Roses, France.
| |
Collapse
|
5
|
Stereotactic Lung Irradiation in Mice Promotes Long-Term Senescence and Lung Injury. Int J Radiat Oncol Biol Phys 2020; 106:1017-1027. [PMID: 31987976 DOI: 10.1016/j.ijrobp.2019.12.039] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 12/19/2019] [Accepted: 12/30/2019] [Indexed: 12/11/2022]
Abstract
PURPOSE Lung cancer will be treated more frequently using stereotactic body radiation therapy, and preclinical research to model long-term toxicity of ablative doses of radiation is crucial. Stereotactic lung irradiation of a small volume can induce radiation pneumonitis and fibrosis in normal tissues. METHODS AND MATERIALS Senescence has been reported to contribute to lung fibrosis, and we investigated in vivo the effects of ablative doses of ionizing radiation on senescence-associated processes. The left lung of p16INK4a-LUC knock-in mice was exposed to a single dose or fractionated radiation doses in a millimetric volume using a small animal radiation research platform. RESULTS Single or fractionated ablative radiation induces acute and very long-term p16INK4a activation in the irradiated lung target volume associated with lung injury. We observed a panel of heterogeneous senescent cells including pneumocytes, macrophages, and endothelial cells that accumulated around the radiation-induced lung focal lesion, suggesting that different senescent cell types may contribute to radiation injury. CONCLUSIONS This work provides important information on the long-term effects of ablative radiation doses in the normal lung and strongly suggests that stress-induced senescence is involved in stereotactic body radiation therapy-induced late fibrosis.
Collapse
|