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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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Ahmed RS, Mohammed RS, Mahdi KH, Mahdi QA, Mostafa MYA, Khalaf HNB. Evaluation of uranium concentration in the blood breast cancer women with CR-39 detector. Appl Radiat Isot 2022; 182:110120. [DOI: 10.1016/j.apradiso.2022.110120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/12/2022] [Accepted: 01/20/2022] [Indexed: 01/09/2023]
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Ahmed RS, Mohammed RS. Assessment of uranium concentration in blood of Iraqi females diagnosed with breast cancer. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2021; 60:193-201. [PMID: 33221962 DOI: 10.1007/s00411-020-00881-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 11/07/2020] [Indexed: 06/11/2023]
Abstract
Cancer is a widespread significant health problem in Iraq and contributes 11% to total deaths. Throughout the Gulf Wars of 1991 and 2003, about 1200 tons of ammunition were dropped around Iraq. After the wars, cancer incidence in Iraq is about 7,000 to 8,000 cancers cases per year, and the overall incidence of lymphoma, leukemia, breast cancer, and lung cancer has increased twofold and even tripled, as compared to the time before the wars. This increase could result from environmental pollution with radioactive materials including uranium, as cancer can be caused by ionizing radiation. To investigate this hypothesis, uranium concentration in the blood of 64 Iraqi females has been measured by means of CR-39 track etch detectors (42 blood samples collected from females diagnosed with breast cancer and 22 blood samples from females without breast cancer). The results show that the uranium concentrations ranged from 19.1 ± 0.3 to 238.4 ± 0.4 with an average value of 94.9 ± 5.0 ng L-1 in the blood of women with breast cancer and from 5.2 ± 0.2 to 18.7 ± 0.04 with an average value of 10.5 ± 0.1 ng L-1 in the blood of women without breast cancer. In comparison with the literature data, elevated levels of uranium concentration were recorded in both groups, and significantly higher average uranium concentrations were found in the blood of women with breast cancer as compared to those in the blood samples of women without breast cancer. It is concluded that there is a correlation between the incidence of breast cancer in Iraqi women and elevated levels of uranium concentrations in their blood. Whether this is a casual relationship is unclear, because cancer can be caused by various carcinogens, including environmental pollution in the region.
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Affiliation(s)
- Rasha S Ahmed
- Department of Physiology, College of Medicine, Al-Nahrain University, Alkadhimiya, PO box 70010, Baghdad, Iraq.
| | - Raghad S Mohammed
- Department of Physics, College of Science, Mustansiriyah University, Baghdad, Iraq
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Grijalba N, Legrand A, Holler V, Bouvier-Capely C. A novel calibration strategy based on internal standard-spiked gelatine for quantitative bio-imaging by LA-ICP-MS: application to renal localization and quantification of uranium. Anal Bioanal Chem 2020; 412:3113-3122. [PMID: 32193588 PMCID: PMC7200646 DOI: 10.1007/s00216-020-02561-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 02/17/2020] [Accepted: 02/28/2020] [Indexed: 10/31/2022]
Abstract
Mass spectrometry imaging (MSI) using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) has been employed for the elemental bio-distribution and quantification of uranium (U) in histological tissue sections of rodent kidneys. Kidneys were immediately immersed into 4% paraformaldehyde (PFA) solution for 24 h, Tissue-Tek O.C.T. Compound embedded and stored at - 80 °C until cutting in a cryostat, and mounted in gel-covered glass slides. In order to assure complete ablation of sample, sample preparation and laser conditions were carefully optimized. In this work, a new analytical methodology is presented for performing quantitative laser ablation analyses based on internal standard (thulium, Tm)-spiked gelatine (10% m/v) for correction of matrix effects, lack of tissue homogeneity, and instrumental drift. In parallel, matrix-matched laboratory standards, dosed at different concentrations of U, were prepared from a pool of rat kidneys. The quantitative images of cryo-sections revealed heterogeneous distribution of uranium within the renal tissue, because the cortical concentration was up to 120-fold higher than the medullary concentration. Graphical abstract.
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Affiliation(s)
- Nagore Grijalba
- Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE/SESANE/LRSI, BP17, 92262, Fontenay-aux-Roses Cedex, France
| | - Alexandre Legrand
- Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE/SESANE/LRSI, BP17, 92262, Fontenay-aux-Roses Cedex, France
| | - Valerie Holler
- Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE/SESANE/LRSI, BP17, 92262, Fontenay-aux-Roses Cedex, France.
| | - Céline Bouvier-Capely
- Institut de Radioprotection et de Sûreté Nucléaire, PSE-SANTE/SESANE/LRSI, BP17, 92262, Fontenay-aux-Roses Cedex, France
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Shahmohammadi Beni M, Krstic D, Nikezic D, Yu KN. Medium-thickness-dependent proton dosimetry for radiobiological experiments. Sci Rep 2019; 9:11577. [PMID: 31399622 PMCID: PMC6689061 DOI: 10.1038/s41598-019-48100-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 07/30/2019] [Indexed: 11/10/2022] Open
Abstract
A calibration method was proposed in the present work to determine the medium-thickness-dependent proton doses absorbed in cellular components (i.e., cellular cytoplasm and nucleus) in radiobiological experiments. Consideration of the dependency on medium thickness was crucial as the linear energy transfer (LET) of protons could rise to a sharp peak (known as the Bragg peak) towards the end of their ranges. Relationships between the calibration coefficient R vs medium-layer thickness were obtained for incident proton energies of 10, 15, 20, 25, 30 and 35 MeV, and for various medium thicknesses up to 5000 μm, where R was defined as the ratio DA/DE, DA was the absorbed proton dose in cellular components, and DE was the absorbed proton dose in a separate radiation detector. In the present work, DA and DE were determined using the MCNPX (Monte Carlo N-Particle eXtended) code version 2.4.0. For lower incident proton energies (i.e., 10, 15 and 20 MeV), formation of Bragg-peak-like features were noticed in their R-vs-medium-layer-thickness relationships, and large R values of >7 and >6 were obtained for cytoplasm and nucleus of cells, respectively, which highlighted the importance of careful consideration of the medium thickness in radiobiological experiments.
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Affiliation(s)
| | - Dragana Krstic
- Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - Dragoslav Nikezic
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong.,Faculty of Science, University of Kragujevac, Kragujevac, Serbia
| | - Kwan Ngok Yu
- Department of Physics, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong. .,State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong.
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