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Portu AM, Espain MS, Thorp SI, Trivillin VA, Curotto P, Monti Hughes A, Pozzi ECC, Garabalino MA, Palmieri MA, Granell PN, Golmar F, Schwint AE, Saint Martin G. Enhanced Resolution of Neutron Autoradiography with UV-C Sensitization to Study Boron Microdistribution in Animal Models. Life (Basel) 2023; 13:1578. [PMID: 37511953 PMCID: PMC10381447 DOI: 10.3390/life13071578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
The assessment of boron microdistribution is essential to evaluate the suitability of boron neutron capture therapy (BNCT) in different biological models. In our laboratory, we have reported a methodology to produce cell imprints on polycarbonate through UV-C sensitization. The aim of this work is to extend the technique to tissue samples in order to enhance spatial resolution. As tissue structure largely differs from cultured cells, several aspects must be considered. We studied the influence of the parameters involved in the imprint and nuclear track formation, such as neutron fluence, different NTDs, etching and UV-C exposure times, tissue absorbance, thickness, and staining, among others. Samples from different biological models of interest for BNCT were used, exhibiting homogeneous and heterogeneous histology and boron microdistribution. The optimal conditions will depend on the animal model under study and the resolution requirements. Both the imprint sharpness and the fading effect depend on tissue thickness. While 6 h of UV-C was necessary to yield an imprint in CR-39, only 5 min was enough to observe clear imprints on Lexan. The information related to microdistribution of boron obtained with neutron autoradiography is of great relevance when assessing new boron compounds and administration protocols and also contributes to the study of the radiobiology of BNCT.
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Affiliation(s)
- Agustina Mariana Portu
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
- School of Science & Technology, National University of San Martín (UNSAM), San Martín B1650JKA, Argentina
| | - María Sol Espain
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
- School of Science & Technology, National University of San Martín (UNSAM), San Martín B1650JKA, Argentina
| | - Silvia Inés Thorp
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
| | - Verónica Andrea Trivillin
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
| | - Paula Curotto
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
| | - Andrea Monti Hughes
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
| | | | | | - Mónica Alejandra Palmieri
- Department of Biodiversity and Experimental Biology, Faculty of Exact and Natural Sciences, University of Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires C1428EGA, Argentina
| | - Pablo Nicolás Granell
- Micro and Nanotechnology Centre of the Bicentennial (CNMB), National Institute of Industrial Technology (INTI), San Martín B1650JKA, Argentina
| | - Federico Golmar
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
- School of Science & Technology, National University of San Martín (UNSAM), San Martín B1650JKA, Argentina
- Micro and Nanotechnology Centre of the Bicentennial (CNMB), National Institute of Industrial Technology (INTI), San Martín B1650JKA, Argentina
| | - Amanda Elena Schwint
- National Atomic Energy Commission (CNEA), San Martín C1429BNP, Argentina
- National Scientific and Technological Research Council (CONICET), Ciudad Autónoma de Buenos Aires C1425FQB, Argentina
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Espain MS, Dattoli Viegas AM, Trivillin VA, Saint Martin G, Thorp SI, Curotto P, Pozzi ECC, González SJ, Portu AM. Neutron autoradiography to study the microdistribution of boron in the lung. Appl Radiat Isot 2020; 165:109331. [PMID: 32777741 DOI: 10.1016/j.apradiso.2020.109331] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2019] [Revised: 06/30/2020] [Accepted: 07/07/2020] [Indexed: 12/12/2022]
Abstract
In Argentina, a multi-institutional project has been established to assess the feasibility of applying BNCT ex-situ to the treatment of patients with multiple metastases in both lungs. Within this context, this work aims at applying the neutron autoradiography technique to study boron microdistribution in the lung. A comprehensive analysis of the different aspects for the generation of autoradiographic images of both normal and metastatic BDIX rat lungs was achieved. Histology, boron uniformity, optimal tissue thickness and water content in tissue were explored for the two types of samples. A qualitative and a quantitative analysis were performed. No heterogeneities in uptake were observed in normal lung. Conversely, samples with metastasis showed preferential boron uptake in the tumour areas with respect to surrounding tissue. Surrounding tissue would present a slightly higher uptake of boron than the normal lung. Quantitative results of boron concentration values and ratios determined by neutron autoradiography were obtained. In order to contribute to BNCT dosimetry, further analysis increasing the number of samples is warranted.
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Affiliation(s)
- María Sol Espain
- 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
| | - 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
| | - Verónica Andrea Trivillin
- 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, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gisela Saint Martin
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Silvia Inés Thorp
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Paula Curotto
- Comisión Nacional de Energía Atómica (CNEA), Av. General Paz 1499, B1650KNA, San Martín, 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, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina
| | - 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, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina.
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Saint Martin G, Portu A, Ibarra M, Alurralde M. UV-C radiation effect on nuclear tracks of different ions in polycarbonate. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108936] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Gadan MA, Lloyd R, Saint Martin G, Olivera MS, Policastro L, Portu AM. Neutron Autoradiography Combined With UV-C Sensitization: Toward the Intracellular Localization of Boron. MICROSCOPY AND MICROANALYSIS : THE OFFICIAL JOURNAL OF MICROSCOPY SOCIETY OF AMERICA, MICROBEAM ANALYSIS SOCIETY, MICROSCOPICAL SOCIETY OF CANADA 2019; 25:1331-1340. [PMID: 31648656 DOI: 10.1017/s1431927619015058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Our group has reported the imprint formation of biological material on polycarbonate nuclear track detectors by UV-C exposure, which is used as an approach to simultaneously visualize cell imprints and nuclear tracks coming from the boron neutron capture reaction. Considering that the cell nucleus has a higher UV-C absorption than the cytoplasm and that hematoxylin preferentially stains the nucleus, we proposed to enhance the contrast between these two main cell structures by hematoxylin staining before UV-C sensitization. In this study, several experiments were performed in order to optimize UV-C exposure parameters and chemical etching conditions for cell imprint formation using the SK-BR-3 breast cancer cell line. The proposed method improves significantly the resolution of the cell imprints. It allows clear differentiation of the nucleus from the rest of the cell, together with nuclear tracks pits. Moreover, it reduces considerably the UV-C exposure time, an important experimental issue. The proposed methodology can be applied to study the boron distribution independently from the chosen cell line and/or boron compounds.
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Affiliation(s)
- Mario A Gadan
- Department of Instrumentation and Dosimetry, National Atomic Energy Commission (CNEA), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- Institute of Nanoscience and Nanotechnology (INN), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Rodrigo Lloyd
- Institute of Nanoscience and Nanotechnology (INN), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- Laboratory of Nanomedicine, CNEA, Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- National Agency for Scientific and Technological Promotion (ANPCyT), Godoy Cruz 2270, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Gisela Saint Martin
- Department of Radiobiology, CNEA, Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - María S Olivera
- Department of Boron Neutron Capture Therapy, CNEA, Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
| | - Lucía Policastro
- Institute of Nanoscience and Nanotechnology (INN), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- Laboratory of Nanomedicine, CNEA, Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- National Scientific and Technical Research Council (CONICET), Godoy Cruz 2270, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina
| | - Agustina M Portu
- Institute of Nanoscience and Nanotechnology (INN), Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- Department of Radiobiology, CNEA, Av. General Paz 1499, B1650KNA, San Martín, Buenos Aires, Argentina
- National Scientific and Technical Research Council (CONICET), Godoy Cruz 2270, C1425FQD, Ciudad Autónoma de Buenos Aires, Argentina
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