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Masunaga SI, Sakurai Y, Tanaka H, Takata T, Suzuki M, Sanada Y, Tano K, Maruhashi A, Ono K. Effect of a change in reactor power on response of murine solid tumors in vivo, referring to impact on quiescent tumor cell population. Int J Radiat Biol 2018; 95:635-645. [PMID: 30557082 DOI: 10.1080/09553002.2019.1558300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
PURPOSE To examine the effect of a change in reactor power on the response of solid tumors, referring to impact on quiescent (Q) tumor cell population. MATERIALS AND METHODS Tumor-bearing mice received 5-bromo-2'-deoxyuridine (BrdU) to label all proliferating (P) tumor cells, and were treated with boronophenylalanine-10B (BPA) or sodium mercaptododecaborate-10B (BSH). After reactor neutron beam irradiation at a power of 1 or 5 MW with an identical beam spectrum, cells from tumors were isolated and incubated with a cytokinesis blocker. The responses of BrdU-unlabeled Q and total (P + Q) tumor cells were assessed based on the frequencies of micronucleation using immunofluorescence staining for BrdU. RESULTS After neutron irradiation with or without 10B-carrier, radio-sensitivity was reduced by decreasing reactor power in both cells, especially in Q cells and after irradiation with BPA. The values of relative and compound biological effectiveness were larger at a power of 5 MW and in Q cells than at a power of 1 MW and in total cells, respectively. The sensitivity difference between total and Q cells was widened when combined with 10B-carrier, especially with BPA, and through decreasing reactor power. CONCLUSION 5 MW is more advantageous than 1 MW for boron neutron capture therapy.
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Affiliation(s)
- Shin-Ichiro Masunaga
- a Particle Radiation Biology, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Yoshinori Sakurai
- b Radiation Medical Physics, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Hiroki Tanaka
- b Radiation Medical Physics, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Takushi Takata
- b Radiation Medical Physics, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Minoru Suzuki
- c Particle Radiation Oncology Center , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Yu Sanada
- a Particle Radiation Biology, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Keizo Tano
- a Particle Radiation Biology, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Akira Maruhashi
- b Radiation Medical Physics, Division of Radiation Life Science , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
| | - Koji Ono
- c Particle Radiation Oncology Center , Institute for Integrated Radiation and Nuclear Science, Kyoto University , Sennan-gun , Osaka , Japan
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Woollard JE, Blue TE, Gupta N, Gahbauer RA. Development and Application of Neutron Field Optimization Parameters for an Accelerator-Based Neutron Source for Boron Neutron Capture Therapy. NUCL TECHNOL 2017. [DOI: 10.13182/nt96-a35279] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jeffrey E. Woollard
- The Ohio State University, Nuclear Engineering Program 1079 Robinson Lab, 206 W. 18th Ave., Columbus, Ohio 43210
| | - Thomas E. Blue
- The Ohio State University, Nuclear Engineering Program 1079 Robinson Lab, 206 W. 18th Ave., Columbus, Ohio 43210
| | - Nilendu Gupta
- The Ohio State University, Radiation Oncology Program The James Cancer Hospital, 300 W. 10th Ave., Columbus, Ohio 43210
| | - Reinhard A. Gahbauer
- The Ohio State University, Radiation Oncology Program The James Cancer Hospital, 300 W. 10th Ave., Columbus, Ohio 43210
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Masunaga SI, Sakurai Y, Tanaka H, Tano K, Suzuki M, Kondo N, Narabayashi M, Nakagawa Y, Watanabe T, Maruhashi A, Ono K. The dependency of compound biological effectiveness factors on the type and the concentration of administered neutron capture agents in boron neutron capture therapy. SPRINGERPLUS 2014; 3:128. [PMID: 25674433 PMCID: PMC4320213 DOI: 10.1186/2193-1801-3-128] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 02/20/2014] [Indexed: 12/02/2022]
Abstract
Purpose To examine the effect of the type and the concentration of neutron capture agents on the values of compound biological effectiveness (CBE) in boron neutron capture therapy. Methods and materials After the subcutaneous administration of a 10B-carrier, boronophenylalanine-10B (BPA) or sodium mercaptododecaborate-10B (BSH), at 3 separate concentrations, the 10B concentrations in tumors were measured by γ-ray spectrometry. SCC VII tumor-bearing C3H/He mice received 5-bromo-2′-deoxyuridine (BrdU) continuously to label all intratumor proliferating (P) cells, then treated with BPA or BSH. Immediately after reactor neutron beam irradiation, during which intratumor 10B concentrations were kept at levels similar to each other, cells from some tumors were isolated and incubated with a cytokinesis blocker. The responses of BrdU-unlabeled quiescent (Q) and total (= P + Q) tumor cells were assessed based on the frequencies of micronucleation using immunofluorescence staining for BrdU. Results The CBE values were higher in Q cells and in the use of BPA than total cells and BSH, respectively. In addition, the higher the administered concentrations were, the smaller the CBE values became, with a clearer tendency in the use of BPA than BSH. The values for neutron capture agents that deliver into solid tumors more dependently on uptake capacity of tumor cells became more changeable. Conclusion Tumor characteristics, such as micro-environmental heterogeneity, stochastic genetic or epigenetic changes, or hierarchical organization of tumor cells, are thought to partially influence on the value of CBE, meaning that the CBE value itself may be one of the indices showing the degree of tumor heterogeneity.
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Affiliation(s)
- Shin-Ichiro Masunaga
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Yoshinori Sakurai
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Hiroki Tanaka
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Keizo Tano
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Minoru Suzuki
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Natsuko Kondo
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Masaru Narabayashi
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Yosuke Nakagawa
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Tsubasa Watanabe
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Akira Maruhashi
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
| | - Koji Ono
- Particle Radiation Biology, Department of Radiation Life and Medical Science, Research Reactor Institute, Kyoto University, 2-1010, Asashiro-nishi, Kumatori-cho, Sennan-gun, Osaka, 590-0494 Japan
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Gupta N, Gahbauer RA, Blue TE, Albertson B. Common challenges and problems in clinical trials of boron neutron capture therapy of brain tumors. J Neurooncol 2003; 62:197-210. [PMID: 12749714 DOI: 10.1007/bf02699945] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Clinical trials for binary therapies, like boron neutron capture therapy (BNCT), pose a number of unique problems and challenges in design, performance, and interpretation of results. In neutron beam development, different groups use different optimization parameters, resulting in beams being considerably different from each other. The design, development, testing, execution of patient pharmacokinetics and the evaluation of results from these studies differ widely. Finally, the clinical trials involving patient treatments vary in many aspects such as their dose escalation strategies, treatment planning methodologies, and the reporting of data. The implications of these differences in the data accrued from these trials are discussed. The BNCT community needs to standardize each aspect of the design, implementation, and reporting of clinical trials so that the data can be used meaningfully.
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Affiliation(s)
- N Gupta
- Division of Radiation Oncology, The Ohio State University, Columbus, OH, USA.
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Burmeister J, Kota C, Maughan RL, Waker AJ. Miniature tissue-equivalent proportional counters for BNCT and BNCEFNT dosimetry. Med Phys 2001; 28:1911-25. [PMID: 11585222 DOI: 10.1118/1.1398303] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
A dual miniature tissue-equivalent proportional counter (TEPC) system has been developed to facilitate microdosimetry for Boron Neutron Capture Therapy (BNCT). This system has been designed specifically to allow the analysis of the single event charged particle spectrum in phantom in high intensity BNCT beams and to provide this microdosimetric information with excellent spatial resolution. Paired A-150 and 10B-loaded A-150 TEPCs with 12.3 mm3 collecting volumes have been constructed. These TEPCs allow more accurate neutron dosimetry than current techniques, offer a direct measure of the boron neutron capture dose, and provide a framework for predicting the biological effectiveness of the absorbed dose. Design aspects and characterization of these detectors are reviewed, along with an exposition of the advantages of microdosimetry using these detectors over conventional dosimetry methods. In addition, the utility of this technique for boron neutron capture enhancement of fast neutron therapy (BNCEFNT) is discussed.
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Affiliation(s)
- J Burmeister
- Gershenson Radiation Oncology Center, Karmanos Cancer Institute, Harper Hospital and Wayne State University, Detroit, Michigan 48201, USA.
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Barth RF, Soloway AH, Goodman JH, Gahbauer RA, Gupta N, Blue TE, Yang W, Tjarks W. Boron neutron capture therapy of brain tumors: an emerging therapeutic modality. Neurosurgery 1999; 44:433-50; discussion 450-1. [PMID: 10069580 DOI: 10.1097/00006123-199903000-00001] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Boron neutron capture therapy (BNCT) is based on the nuclear reaction that occurs when boron-10, a stable isotope, is irradiated with low-energy thermal neutrons to yield alpha particles and recoiling lithium-7 nuclei. For BNCT to be successful, a large number of 10B atoms must be localized on or preferably within neoplastic cells, and a sufficient number of thermal neutrons must be absorbed by the 10B atoms to sustain a lethal 10B (n, alpha) lithium-7 reaction. There is a growing interest in using BNCT in combination with surgery to treat patients with high-grade gliomas and possibly metastatic brain tumors. The present review covers the biological and radiobiological considerations on which BNCT is based, boron-containing low- and high-molecular weight delivery agents, neutron sources, clinical studies, and future areas of research. Two boron compounds currently are being used clinically, sodium borocaptate and boronophenylalanine, and a number of new delivery agents are under investigation, including boronated porphyrins, nucleosides, amino acids, polyamines, monoclonal and bispecific antibodies, liposomes, and epidermal growth factor. These are discussed, as is optimization of their delivery. Nuclear reactors currently are the only source of neutrons for BNCT, and the fission reaction within the core produces a mixture of lower energy thermal and epithermal neutrons, fast or high-energy neutrons, and gamma-rays. Although thermal neutron beams have been used clinically in Japan to treat patients with brain tumors and cutaneous melanomas, epithermal neutron beams now are being used in the United States and Europe because of their superior tissue-penetrating properties. Currently, there are clinical trials in progress in the United States, Europe, and Japan using a combination of debulking surgery and then BNCT to treat patients with glioblastomas. The American and European studies are Phase I trials using boronophenylalanine and sodium borocaptate, respectively, as capture agents, and the Japanese trial is a Phase II study. Boron compound and neutron dose escalation studies are planned, and these could lead to Phase II and possibly to randomized Phase III clinical trials that should provide data regarding therapeutic efficacy.
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Affiliation(s)
- R F Barth
- Department of Pathology, Comprehensive Cancer Center, The Ohio State University, Columbus 43210, USA
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Raaijmakers CP, Bruinvis IA, Nottelman EL, Mijnheer BJ. A fast and accurate treatment planning method for boron neutron capture therapy. Radiother Oncol 1998; 46:321-32. [PMID: 9572626 DOI: 10.1016/s0167-8140(97)00183-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND PURPOSE The aim of this study was to test the applicability of conventional semi-empirical algorithms for the treatment planning of boron neutron capture therapy (BNCT). MATERIALS AND METHODS Beam data of a clinical epithermal BNCT beam obtained in a large cuboid water phantom were introduced into a commercial treatment planning system (TPS). For the calculation of thermal neutron fluence distributions, the Gaussian pencil beam model of the electron beam treatment planning algorithm was used. A simple photon beam algorithm was used for the calculation of the gamma-ray and fast neutron dose distribution. The calculated dose and fluence distributions in the central plane of an anthropomorphic head phantom were compared with measurements for various field sizes. The calculation time was less than 1 min. RESULTS At the normalization point in the head phantom, the absolute dose and fluence values agreed within the measurement uncertainty of approximately 2-3% (1 SD) with those at the same depth in a cuboid phantom of approximately the same size. Excellent agreement of within 2-3% (1 SD) was obtained between measured and calculated relative fluence and dose values on the central beam axis and at most off-axis positions in the head phantom. At positions near the phantom boundaries, generally in low dose regions, local differences of approximately 30% were observed. CONCLUSIONS A fast and accurate treatment planning method has been developed for BNCT. This is the first treatment planning method that may allow the same interactive optimization procedures for BNCT as applied clinically for conventional radiotherapy.
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Affiliation(s)
- C P Raaijmakers
- Radiotherapy Department, The Netherlands Cancer Institute/Antoni van Leeuwenhoek Huis, Amsterdam
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Gahbauer R, Gupta N, Blue T, Goodman J, Barth R, Grecula J, Soloway AH, Sauerwein W, Wambersie A. Boron neutron capture therapy: principles and potential. Recent Results Cancer Res 1998; 150:183-209. [PMID: 9670292 DOI: 10.1007/978-3-642-78774-4_12] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
This book on the therapeutic applications of neutrons and high-LET radiations in cancer therapy would not have been complete without a review of the present situation of boron neutron capture therapy (BNCT) and a discussion of its future perspectives. BNCT is a special type of high-LET radiation therapy that attempts to achieve a selectivity at the cellular level. The rationale is to incorporate boron atoms selectively in the cancer cells and then bombard those atoms with thermal neutrons to produce a neutron capture reaction and subsequent decay that emits alpha and lithium particles. The efficiency of the technique depends upon achieving selective incorporation of the boron atoms in the cancer cells and not (or to a lesser extent) in the normal cells. The present status and future directions are described, with emphasis on boron carriers (drugs) and their delivery, as well as physical and treatment planning aspects.
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Affiliation(s)
- R Gahbauer
- Division of Radiation Oncology, Ohio State University, Columbus 43210, USA
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9
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Barth RF, Soloway AH, Brugger RM. Boron neutron capture therapy of brain tumors: past history, current status, and future potential. Cancer Invest 1996; 14:534-50. [PMID: 8951358 DOI: 10.3109/07357909609076899] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Boron neutron capture therapy (BNCT) is based on the nuclear reaction that occurs when boron-10 is irradiated with low-energy thermal neutrons to yield alpha particles and recoiling lithium-7 nuclei. High-grade astrocytomas, glioblastoma multiforme, and metastatic brain tumors constitute a major group of neoplasms for which there is no effective treatment. There is growing interest in using BNCT in combination with surgery to treat patients with primary, and possibly metastatic brain tumors. For BNCT to be successful, a large number of 10B atoms must be localized on or preferably within neoplastic cells, and a sufficient number of thermal neutrons must reach and be absorbed by the 10B atoms to sustain a lethal 10B(n, alpha)7 Li reaction. Two major questions will be addressed in this review. First, how can a large number of 10B atoms be delivered selectively to cancer cells? Second, how can a high fluence of neutrons be delivered to the tumor? Two boron compounds currently are being used clinically, sodium borocaptate (BSH) and boronophenylalanine (BPA), and a number of new delivery agents are under investigation, including boronated porphyrins, nucleosides, amino acids, polyamines, monoclonal and bispecific antibodies, liposomes, and epidermal growth factor. These will be discussed, and potential problems associated with their use as boron delivery agents will be considered. Nuclear reactors, currently, are the only source of neutrons for BNCT, and the fission process within the core produces a mixture of lower-energy thermal and epithermal neutrons, fast or high (> 10,000 eV) energy neutrons, and gamma rays. Although thermal neutron beams have been used clinically in Japan to treat patients with brain tumors and cutaneous melanomas, epithermal neutron beams should be more useful because of their superior tissue-penetrating properties. Beam sources and characteristics will be discussed in the context of current and future BNCT trials. Finally, the past and present clinical trials on BNCT for brain tumors will be reviewed and the future potential of BNCT will be assessed.
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Affiliation(s)
- R F Barth
- Department of Pathology, Ohio State University, Columbus 43210, USA
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