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Dose Rate Effect on Cell Survival in BNCT

The output constancy of the accelerator used for boron neutron capture therapy (BNCT) is essential to ensuring anti-tumor efficacy and safety. BNCT as currently practiced requires a wide variety of beam quality assessments to ensure that RBE dose errors are maintained within 5%. However, the necessi...

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Autores principales: Hirose, Katsumi, Sato, Mariko, Ichise, Koji, Aoki, Masahiko
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10530115/
https://www.ncbi.nlm.nih.gov/pubmed/37754225
http://dx.doi.org/10.3390/cimb45090441
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author Hirose, Katsumi
Sato, Mariko
Ichise, Koji
Aoki, Masahiko
author_facet Hirose, Katsumi
Sato, Mariko
Ichise, Koji
Aoki, Masahiko
author_sort Hirose, Katsumi
collection PubMed
description The output constancy of the accelerator used for boron neutron capture therapy (BNCT) is essential to ensuring anti-tumor efficacy and safety. BNCT as currently practiced requires a wide variety of beam quality assessments to ensure that RBE dose errors are maintained within 5%. However, the necessity of maintaining a constant beam dose rate has not been fully discussed. We therefore clarified the effect of different physical dose rates of the accelerator BNCT on biological effects. SAS and A172 cells exposed to (10)B-boronophenylalanine were irradiated using a neutron beam (normal operating current, 100 μA) at the Aomori Quantum Science Center. Thermal neutron flux was attenuated to 50.0 ± 0.96% under 50 μA irradiation compared to that under 100 μA irradiation. Cells were given physical doses of 1.67 and 3.36 Gy at 30 and 60 mC, respectively, and survival was significantly increased after 50 μA irradiation for both cell types (p = 0.0052 for SAS; p = 0.046 for A172, for 60 mC). Differences in accelerator BNCT beam dose rates have non-negligible effects on biological effects. Dose rate fluctuations and differences should not be easily permitted to obtain consistent biological effects.
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spelling pubmed-105301152023-09-28 Dose Rate Effect on Cell Survival in BNCT Hirose, Katsumi Sato, Mariko Ichise, Koji Aoki, Masahiko Curr Issues Mol Biol Communication The output constancy of the accelerator used for boron neutron capture therapy (BNCT) is essential to ensuring anti-tumor efficacy and safety. BNCT as currently practiced requires a wide variety of beam quality assessments to ensure that RBE dose errors are maintained within 5%. However, the necessity of maintaining a constant beam dose rate has not been fully discussed. We therefore clarified the effect of different physical dose rates of the accelerator BNCT on biological effects. SAS and A172 cells exposed to (10)B-boronophenylalanine were irradiated using a neutron beam (normal operating current, 100 μA) at the Aomori Quantum Science Center. Thermal neutron flux was attenuated to 50.0 ± 0.96% under 50 μA irradiation compared to that under 100 μA irradiation. Cells were given physical doses of 1.67 and 3.36 Gy at 30 and 60 mC, respectively, and survival was significantly increased after 50 μA irradiation for both cell types (p = 0.0052 for SAS; p = 0.046 for A172, for 60 mC). Differences in accelerator BNCT beam dose rates have non-negligible effects on biological effects. Dose rate fluctuations and differences should not be easily permitted to obtain consistent biological effects. MDPI 2023-08-23 /pmc/articles/PMC10530115/ /pubmed/37754225 http://dx.doi.org/10.3390/cimb45090441 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Hirose, Katsumi
Sato, Mariko
Ichise, Koji
Aoki, Masahiko
Dose Rate Effect on Cell Survival in BNCT
title Dose Rate Effect on Cell Survival in BNCT
title_full Dose Rate Effect on Cell Survival in BNCT
title_fullStr Dose Rate Effect on Cell Survival in BNCT
title_full_unstemmed Dose Rate Effect on Cell Survival in BNCT
title_short Dose Rate Effect on Cell Survival in BNCT
title_sort dose rate effect on cell survival in bnct
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10530115/
https://www.ncbi.nlm.nih.gov/pubmed/37754225
http://dx.doi.org/10.3390/cimb45090441
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