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Viegas AMD, Postuma I, Bortolussi S, Guidi C, Riback JS, Provenzano L, Marcaccio B, Rossini AE, Ferrari C, Cansolino L, Ferrari M, Portu AM, González SJ. Detailed dosimetry calculation for in-vitro experiments and its impact on clinical BNCT. Phys Med 2021; 89:282-292. [PMID: 34474326 DOI: 10.1016/j.ejmp.2021.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 07/18/2021] [Accepted: 08/21/2021] [Indexed: 10/20/2022] Open
Abstract
PURPOSE Boron Neutron Capture Therapy (BNCT) is a form of hadrontherapy based on the selective damage caused by the products of neutron capture in 10B to tumour cells. BNCT dosimetry strongly depends on the parameters of the dose calculation models derived from radiobiological experiments. This works aims at determining an adequate dosimetry for in-vitro experiments involving irradiation of monolayer-cultured cells with photons and BNCT and assessing its impact on clinical settings. M&M: Dose calculations for rat osteosarcoma UMR-106 and human metastatic melanoma Mel-J cell survival experiments were performed using MCNP, transporting uncharged particles for KERMA determinations, and secondary particles (electrons, protons, 14C, 4He and 7Li) to compute absorbed dose in cultures. Dose-survival curves were modified according to the dose correction factors determined from computational studies. New radiobiological parameters of the photon isoeffective dose models for osteosarcoma and metastatic melanoma tumours were obtained. Dosimetry implications considering cutaneous melanoma patients treated in Argentina with BNCT were assessed and discussed. RESULTS KERMA values for the monolayer-cultured cells overestimate absorbed doses of radiation components of interest in BNCT. Detailed dose calculations for the osteosarcoma irradiation increased the relative biological effectiveness factor RBE1% of the neutron component in more than 30%. The analysis based on melanoma cases reveals that the use of survival curves based on KERMA leads to an underestimation of the tumour doses delivered to patients. CONCLUSIONS Considering detailed dose calculation for in-vitro experiments significantly impact on the prediction of the tumor control in patients. Therefore, proposed methods are clinically relevant.
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Affiliation(s)
- Ana Mailén Dattoli Viegas
- Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón I, Ciudad Universitaria, C1428EHA Buenos Aires, Argentina; Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Ian Postuma
- National Institute of Nuclear Physics (INFN), Unit of Pavia, via A. Bassi 6, 27100 Pavia, Italy
| | - Silva Bortolussi
- National Institute of Nuclear Physics (INFN), Unit of Pavia, via A. Bassi 6, 27100 Pavia, Italy; University of Pavia, Department of Physics, via A. Bassi 6, 27100 Pavia, Italy.
| | - Claretta Guidi
- National Institute of Nuclear Physics (INFN), Unit of Pavia, via A. Bassi 6, 27100 Pavia, Italy; University of Pavia, Department of Physics, via A. Bassi 6, 27100 Pavia, Italy
| | - Jessica Sofía Riback
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2270, C, Ciudad Autónoma de Buenos Aires, Argentina
| | - Lucas Provenzano
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Barbara Marcaccio
- University of Pavia, Department of Physics, via A. Bassi 6, 27100 Pavia, Italy
| | - Andrés Eugenio Rossini
- Laboratorio de Radiopatología, Gerencia de Mediciones y Evaluaciones en protección Radiológica. Autoridad Regulatoria Nuclear (ARN), Av. del Libertador 8250, C1429 BNP Ciudad Autónoma de Buenos Aires, Argentina
| | - Cinzia Ferrari
- National Institute of Nuclear Physics (INFN), Unit of Pavia, via A. Bassi 6, 27100 Pavia, Italy; University of Pavia, Laboratory of Experimental Surgery, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, via Ferrata 9, 27100 Pavia, Italy
| | - Laura Cansolino
- National Institute of Nuclear Physics (INFN), Unit of Pavia, via A. Bassi 6, 27100 Pavia, Italy; University of Pavia, Laboratory of Experimental Surgery, Department of Clinical-Surgical, Diagnostic and Pediatric Sciences, via Ferrata 9, 27100 Pavia, Italy
| | | | - Agustina Mariana Portu
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2270, C, Ciudad Autónoma de Buenos Aires, Argentina
| | - Sara Josefina González
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz 2270, C, Ciudad Autónoma de Buenos Aires, Argentina
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Portu A, Rossini AE, Thorp SI, Curotto P, Pozzi ECC, Granell P, Golmar F, Cabrini RL, Martin GS. Simultaneous Observation of Cells and Nuclear Tracks from the Boron Neutron Capture Reaction by UV-C Sensitization of Polycarbonate. Microsc Microanal 2015; 21:796-804. [PMID: 26155721 DOI: 10.1017/s1431927615014348] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The distribution of boron in tissue samples coming from boron neutron capture therapy protocols can be determined through the analysis of its autoradiography image on a nuclear track detector. A more precise knowledge of boron atom location on the microscopic scale can be attained by the observation of nuclear tracks superimposed on the sample image on the detector. A method to produce an "imprint" of cells cultivated on a polycarbonate detector was developed, based on the photodegradation properties of UV-C radiation on this material. Optimal conditions to generate an appropriate monolayer of Mel-J cells incubated with boronophenylalanine were found. The best images of both cells and nuclear tracks were obtained for a neutron fluence of 1013 cm-2, 6 h UV-C (254 nm) exposure, and 4 min etching time with a KOH solution. The imprint morphology was analyzed by both light and scanning electron microscopy. Similar samples, exposed to UV-A (360 nm) revealed no cellular imprinting. Etch pits were present only inside the cell imprints, indicating a preferential boron uptake (about threefold the incubation concentration). Comparative studies of boron absorption in different cell lines and in vitro evaluation of the effect of diverse boron compounds are feasible with this methodology.
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Affiliation(s)
- Agustina Portu
- 1Department of Radiobiology,National Atomic Energy Commission (CNEA),Av. General Paz 1499,B1650KNA,San Martín,Buenos Aires,Argentina
| | - Andrés Eugenio Rossini
- 3Nuclear Regulatory Authority (ARN),Libertador 8250,C1429BNP,Ciudad Autónoma de Buenos Aires,Argentina
| | - Silvia Inés Thorp
- 4Department of Instrumentation and Control,CNEA,Presbítero Juan González Aragón,B1802AYA,Ezeiza,Buenos Aires,Argentina
| | - Paula Curotto
- 5Department of Research and Production Reactors,CNEA,Presbítero Juan González Aragón,B1802AYA,Ezeiza,Buenos Aires,Argentina
| | - Emiliano César Cayetano Pozzi
- 5Department of Research and Production Reactors,CNEA,Presbítero Juan González Aragón,B1802AYA,Ezeiza,Buenos Aires,Argentina
| | - Pablo Granell
- 6Micro and Nanotechnology Centre of the Bicentennial (CNMB),National Institute of Industrial Technology (INTI),Av. Gral. Paz 5445,Ed. 42,B1650JKA,San Martín,Buenos Aires,Argentina
| | - Federico Golmar
- 2National Research Council (CONICET),Av. Rivadavia 1917,C1033AAJ,Ciudad Autónoma de Buenos Aires,Argentina
| | - Rómulo Luis Cabrini
- 1Department of Radiobiology,National Atomic Energy Commission (CNEA),Av. General Paz 1499,B1650KNA,San Martín,Buenos Aires,Argentina
| | - Gisela Saint Martin
- 1Department of Radiobiology,National Atomic Energy Commission (CNEA),Av. General Paz 1499,B1650KNA,San Martín,Buenos Aires,Argentina
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Portu AM, Rossini AE, Gadan MA, Bernaola OA, Thorp SI, Curotto P, Pozzi ECC, Cabrini RL, Martin GS. Experimental set up for the irradiation of biological samples and nuclear track detectors with UV C. Rep Pract Oncol Radiother 2014; 21:129-34. [PMID: 26933396 DOI: 10.1016/j.rpor.2014.10.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2014] [Revised: 07/10/2014] [Accepted: 10/10/2014] [Indexed: 11/29/2022] Open
Abstract
AIM In this work we present a methodology to produce an "imprint" of cells cultivated on a polycarbonate detector by exposure of the detector to UV C radiation. BACKGROUND The distribution and concentration of (10)B atoms in tissue samples coming from BNCT (Boron Neutron Capture Therapy) protocols can be determined through the quantification and analysis of the tracks forming its autoradiography image on a nuclear track detector. The location of boron atoms in the cell structure could be known more accurately by the simultaneous observation of the nuclear tracks and the sample image on the detector. MATERIALS AND METHODS A UV C irradiator was constructed. The irradiance was measured along the lamp direction and at different distances. Melanoma cells were cultured on polycarbonate foils, incubated with borophenylalanine, irradiated with thermal neutrons and exposed to UV C radiation. The samples were chemically attacked with a KOH solution. RESULTS A uniform irradiation field was established to expose the detector foils to UV C light. Cells could be seeded on the polycarbonate surface. Both imprints from cells and nuclear tracks were obtained after chemical etching. CONCLUSIONS It is possible to yield cellular imprints in polycarbonate. The nuclear tracks were mostly present inside the cells, indicating a preferential boron uptake.
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Affiliation(s)
- Agustina Mariana Portu
- Department of Radiobiology, National Atomic Energy Commission (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina; National Research Council (CONICET), Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - Andrés Eugenio Rossini
- Department of Radiobiology, National Atomic Energy Commission (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Mario Alberto Gadan
- Department of Instrumentation and Control, CNEA, Presbítero Juan González Aragón, B1802AYA Ezeiza, Buenos Aires, Argentina
| | - Omar Alberto Bernaola
- Department of Radiobiology, National Atomic Energy Commission (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Silvia Inés Thorp
- Department of Instrumentation and Control, CNEA, Presbítero Juan González Aragón, B1802AYA Ezeiza, Buenos Aires, Argentina
| | - Paula Curotto
- Department of Research and Production Reactors, CNEA, Presbítero Juan González Aragón, B1802AYA, Ezeiza, Buenos Aires, Argentina
| | - Emiliano César Cayetano Pozzi
- Department of Research and Production Reactors, CNEA, Presbítero Juan González Aragón, B1802AYA, Ezeiza, Buenos Aires, Argentina
| | - Rómulo Luis Cabrini
- Department of Radiobiology, National Atomic Energy Commission (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina; Faculty of Dentistry, University of Buenos Aires, Marcelo T. de Alvear 2142, C1122AAH, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gisela Saint Martin
- Department of Radiobiology, National Atomic Energy Commission (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
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