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Cartelli DE, Capoulat ME, Baldo M, Sandín JCS, Igarzabal M, Grosso MFD, Valda AA, Canepa N, Gun M, Minsky DM, Conti G, Erhardt J, Somacal HR, Bertolo AA, Bergueiro J, Gaviola PA, Kreiner AJ. Status of low-energy accelerator-based BNCT worldwide and in Argentina. Appl Radiat Isot 2020; 166:109315. [PMID: 32966949 DOI: 10.1016/j.apradiso.2020.109315] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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: 11/06/2019] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 11/30/2022]
Abstract
Existing and active low-energy Accelerator-Based BNCT programs worldwide will be reviewed and compared. In particular, the program in Argentina will be discussed which consists of the development of an Electro-Static-Quadrupole (ESQ) Accelerator-Based treatment facility. The facility is conceived to operate with the deuteron-induced reactions 9Be(d,n)10B and 13C(d,n)14N at 1.45 MeV deuteron energy, as neutron sources. Neutron production target development status is specified. The present status of the construction of the new accelerator development laboratory and future BNCT centre is shown.
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Affiliation(s)
- D E Cartelli
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - M E Capoulat
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - M Baldo
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - J C Suárez Sandín
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - M Igarzabal
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - M F Del Grosso
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - A A Valda
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina
| | - N Canepa
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - M Gun
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Facultad de Ingeniería, UBA, Paseo Colón 850, Ciudad Autónoma de Buenos Aires, Argentina
| | - D M Minsky
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina
| | - G Conti
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - J Erhardt
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - H R Somacal
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina
| | - A A Bertolo
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - J Bergueiro
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - P A Gaviola
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina
| | - A J Kreiner
- CNEA, Av. Gral Paz 1499, B1650KNA, San Martín, Prov. Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, Martín de Irigoyen Nº, 3100 1650, San Martín, Prov. Buenos Aires, Argentina; CONICET, Av. Rivadavia 1917, C1033AAJ, Ciudad Autónoma de Buenos Aires, Argentina.
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2
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Minsky DM, Kreiner AJ. Near threshold ⁷Li(p,n) ⁷Be reaction as neutron source for BNCT. Appl Radiat Isot 2015; 106:68-71. [PMID: 26235187 DOI: 10.1016/j.apradiso.2015.07.038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 01/30/2015] [Revised: 06/26/2015] [Accepted: 07/25/2015] [Indexed: 11/16/2022]
Abstract
(7)Li(p,n)(7)Be is an endothermic reaction and working near its threshold (1.88 MeV) has the advantage of neutron spectra with maximum energies of about 100 keV, considerably lower than at higher beam energies, or than using other neutron-producing reactions or as for the uranium fission spectrum, relevant for BNCT based on nuclear reactors. With this primary energy it is much easier to obtain the energies needed for treating deep seated tumors by BNCT (about 10 keV). This work studies bombarding energies up to 2.05 MeV, different beam incidence angles and the effect of the undesirable gamma production via the (7)Li(p,γp') (7)Li reaction.
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Affiliation(s)
- D M Minsky
- Gerencia de Investigación y Aplicaciones, CNEA, Av. Gral Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, UNSAM, M. de Irigoyen 3100 (1650), San Martín, Argentina; CONICET, Av. Rivadavia 1917 (C1033AAJ), Buenos Aires, Argentina.
| | - A J Kreiner
- Gerencia de Investigación y Aplicaciones, CNEA, Av. Gral Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, UNSAM, M. de Irigoyen 3100 (1650), San Martín, Argentina; CONICET, Av. Rivadavia 1917 (C1033AAJ), Buenos Aires, Argentina
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3
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Abstract
In this work we review all the available experimental neutron data for the (7)Li(p,n) reaction near threshold which is necessary to obtain an accurate source model for Monte Carlo simulations in Boron Neutron Capture Therapy. Scattered published experimental results such as cross sections, differential neutron yields and total yields were collected and analyzed, exploring the sensitivity of the fitting parameters to the different possible variables and deriving a consistent working set of parameters to evaluate the neutron source near threshold.
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Affiliation(s)
- María S Herrera
- Comisión Nacional de Energía Atómica (CNEA), Av. Gral. Paz 1499, Buenos Aires B1650KNA, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Buenos Aires C1033AAJ, Argentina; Universidad Nacional de Gral. San Martín (UNSAM), 25 de Mayo y Francia, Buenos Aires B1650KNA, Argentina.
| | - Gustavo A Moreno
- YPF Tecnología S.A., Baradero, 1925, Ensenada, Buenos Aires, Argentina; Dpto. de F\'isica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428, Buenos Aires, Argentina
| | - Andrés J Kreiner
- Comisión Nacional de Energía Atómica (CNEA), Av. Gral. Paz 1499, Buenos Aires B1650KNA, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Buenos Aires C1033AAJ, Argentina; Universidad Nacional de Gral. San Martín (UNSAM), 25 de Mayo y Francia, Buenos Aires B1650KNA, Argentina
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Capoulat ME, Minsky DM, Kreiner AJ. Computational assessment of deep-seated tumor treatment capability of the 9Be(d,n)10B reaction for accelerator-based boron neutron capture therapy (AB-BNCT). Phys Med 2013; 30:133-46. [PMID: 23880544 DOI: 10.1016/j.ejmp.2013.07.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2013] [Revised: 06/10/2013] [Accepted: 07/02/2013] [Indexed: 11/19/2022] Open
Abstract
The 9Be(d,n)10B reaction was studied as an epithermal neutron source for brain tumor treatment through Boron Neutron Capture Therapy (BNCT). In BNCT, neutrons are classified according to their energies as thermal (<0.5 eV), epithermal (from 0.5 eV to 10 keV) or fast (>10 keV). For deep-seated tumors epithermal neutrons are needed. Since a fraction of the neutrons produced by this reaction are quite fast (up to 5-6 MeV, even for low-bombarding energies), an efficient beam shaping design is required. This task was carried out (1) by selecting the combinations of bombarding energy and target thickness that minimize the highest-energy neutron production; and (2) by the appropriate choice of the Beam Shaping Assembly (BSA) geometry, for each of the combinations found in (1). The BSA geometry was determined as the configuration that maximized the dose deliverable to the tumor in a 1 h treatment, within the constraints imposed by the healthy tissue dose adopted tolerance. Doses were calculated through the MCNP code. The highest dose deliverable to the tumor was found for an 8 μm target and a deuteron beam of 1.45 MeV. Tumor weighted doses ≥40 Gy can be delivered up to about 5 cm in depth, with a maximum value of 51 Gy at a depth of about 2 cm. This dose performance can be improved by relaxing the treatment time constraint and splitting the treatment into two 1-h sessions. These good treatment capabilities strengthen the prospects for a potential use of this reaction in BNCT.
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Affiliation(s)
- M E Capoulat
- Gerencia de Investigación y Aplicaciones, CNEA, Av. Gral. Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, M. de Irigoyen 3100 (1650), San Martín, Buenos Aires, Argentina; CONICET. Av. Rivadavia 1917 (C1033AAJ), Buenos Aires, Argentina.
| | - D M Minsky
- Gerencia de Investigación y Aplicaciones, CNEA, Av. Gral. Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, M. de Irigoyen 3100 (1650), San Martín, Buenos Aires, Argentina; CONICET. Av. Rivadavia 1917 (C1033AAJ), Buenos Aires, Argentina
| | - A J Kreiner
- Gerencia de Investigación y Aplicaciones, CNEA, Av. Gral. Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina; Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, M. de Irigoyen 3100 (1650), San Martín, Buenos Aires, Argentina; CONICET. Av. Rivadavia 1917 (C1033AAJ), Buenos Aires, Argentina
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Minsky DM, Kreiner AJ, Valda AA. AB-BNCT beam shaping assembly based on 7Li(p,n)7Be reaction optimization. Appl Radiat Isot 2011; 69:1668-71. [PMID: 21411330 DOI: 10.1016/j.apradiso.2011.02.047] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 02/28/2011] [Accepted: 02/28/2011] [Indexed: 11/28/2022]
Abstract
A numerical optimization of a Beam Shaping Assembly (BSA) for Accelerator Based-Boron Neutron Capture Therapy (AB-BNCT) has been performed. The reaction (7)Li(p,n)(7)Be has been considered using a proton beam on a lithium fluoride target. Proton energy and the dimensions of a simple BSA geometry have been varied to obtain a set of different configurations. The optimal configuration of this set is shown.
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Affiliation(s)
- D M Minsky
- Gerencia de Investigación y Aplicaciones, CNEA, San Martín, Buenos Aires, Argentina.
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Capoulat ME, Minsky DM, Kreiner AJ. Applicability of the 9Be(d,n)10B reaction to AB-BNCT skin and deep tumor treatment. Appl Radiat Isot 2011; 69:1684-7. [PMID: 21353576 DOI: 10.1016/j.apradiso.2011.02.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2010] [Revised: 02/08/2011] [Accepted: 02/08/2011] [Indexed: 10/18/2022]
Abstract
In the range of low bombarding energies (less than about 1.5 MeV) the (9)Be(d,n)(10)B reaction produces neutron spectra that can be moderated depending on the choice of the target thickness and the deuteron bombarding energy. In this work, a Monte Carlo simulation study to determine the capability of this reaction to deliver enough dose to efficiently control both skin and deep seated tumors has been performed by means of MCNP calculations using eight optimized (9)Be targets.
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Affiliation(s)
- M E Capoulat
- Gerencia de Investigación y Aplicaciones, CNEA, San Martín, Buenos Aires, Argentina.
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Ibañez IL, Bracalente C, Molinari BL, Palmieri MA, Policastro L, Kreiner AJ, Burlón AA, Valda A, Navalesi D, Davidson J, Davidson M, Vázquez M, Ozafrán M, Durán H. Induction and Rejoining of DNA Double Strand Breaks Assessed by H2AX Phosphorylation in Melanoma Cells Irradiated with Proton and Lithium Beams. Int J Radiat Oncol Biol Phys 2009; 74:1226-35. [DOI: 10.1016/j.ijrobp.2009.02.070] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2008] [Revised: 02/23/2009] [Accepted: 02/27/2009] [Indexed: 10/20/2022]
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Kreiner AJ, Thatar Vento V, Levinas P, Bergueiro J, Di Paolo H, Burlon AA, Kesque JM, Valda AA, Debray ME, Somacal HR, Minsky DM, Estrada L, Hazarabedian A, Johann F, Suarez Sandin JC, Castell W, Davidson J, Davidson M, Giboudot Y, Repetto M, Obligado M, Nery JP, Huck H, Igarzabal M, Fernandez Salares A. Development of a tandem-electrostatic-quadrupole accelerator facility for BNCT. Appl Radiat Isot 2009; 67:S266-9. [PMID: 19376714 DOI: 10.1016/j.apradiso.2009.03.084] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In this work we describe the present status of an ongoing project to develop a tandem-electrostatic-quadrupole (TESQ) accelerator facility for accelerator-based (AB) BNCT at the Atomic Energy Commission of Argentina in Buenos Aires. The project final goal is a machine capable of delivering 30 mA of 2.4 MeV protons to be used in conjunction with a neutron production target based on the (7)Li(p,n)(7)Be reaction slightly beyond its resonance at 2.25 MeV. These are the specifications needed to produce sufficiently intense and clean epithermal neutron beams, based on the (7)Li(p,n)(7)Be reaction, to perform BNCT treatment for deep-seated tumors in less than an hour. An electrostatic machine is the technologically simplest and cheapest solution for optimized AB-BNCT. The machine being designed and constructed is a folded TESQ with a high-voltage terminal at 1.2 MV intended to work in air. Such a machine is conceptually shown to be capable of transporting and accelerating a 30 mA proton beam to 2.4 MeV. The general geometric layout, its associated electrostatic fields, and the acceleration tube are simulated using a 3D finite element procedure. The design and construction of the ESQ modules is discussed and their electrostatic fields are investigated. Beam transport calculations through the accelerator are briefly mentioned. Likewise, work related to neutron production targets, strippers, beam shaping assembly and patient treatment room is briefly described.
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Affiliation(s)
- A J Kreiner
- Departamento de Física, Comisión Nacional de Energía Atómica, Av. Gral Paz 1499 (1650), San Martín, Buenos Aires, Argentina.
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Abstract
This article reports on the development of a prototype of a SPECT tomograph system for online dosimetry in BNCT based on LaBr(3)(Ce) scintillation detectors. The setup shielding was optimized to be used in the accelerator based BNCT facility of the University of Birmingham. The system was designed and built. An image of a (241)Am point source was reconstructed. A projection of a phantom with two tumors with 400 microg/g of (10)B was measured at the BNCT facility.
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Affiliation(s)
- D M Minsky
- Dpto de Física, CNEA, Av. Gral Paz 1499 (B1650KNA), San Martín, Buenos Aires, Argentina.
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Abstract
Different materials and proton beam energies have been studied in order to search for an optimized neutron production target and beam shaping assembly for accelerator-based BNCT. The solution proposed in this work consists of successive stacks of Al, polytetrafluoroethylene, commercially known as Teflon, and LiF as moderator and neutron absorber, and Pb as reflector. This assembly is easy to build and its cost is relatively low. An exhaustive Monte Carlo simulation study has been performed evaluating the doses delivered to a Snyder model head phantom by a neutron production Li-metal target based on the (7)Li(p,n)(7)Be reaction for proton bombarding energies of 1.92, 2.0, 2.3 and 2.5 MeV. Three moderator thicknesses have been studied and the figures of merit show the advantage of irradiating with near-resonance-energy protons (2.3 MeV) because of the relatively high neutron yield at this energy, which at the same time keeps the fast neutron healthy tissue dose limited and leads to the lowest treatment times. A moderator of 34 cm length has shown the best performance among the studied cases.
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Affiliation(s)
- A A Burlon
- Escuela de Ciencia y Tecnología, Universidad de San Martín, Alem 3901, 1653 Villa Ballester, Argentina.
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Stoliar P, Kreiner AJ, Debray ME, Caraballo ME, Valda AA, Davidson J, Davidson M, Kesque JM, Somacal H, DiPaolo H, Burlon AA, Ozafrán MJ, Vázquez ME, Minsky D, Heber EM, Trivillin VA, Schwint AE. Microdistributions of prospective BNCT-compound CuTCPH in tissue sections with a heavy ion microbeam. Appl Radiat Isot 2004; 61:771-4. [PMID: 15308142 DOI: 10.1016/j.apradiso.2004.05.062] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Microdistributions of the prospective BNCT-compound CuTCPH, a carborane-containing tetraphenylporphyrin with one Cu atom in its molecular structure, have been obtained in tissue sections of different organs of tumor-bearing and normal Syrian hamsters injected with the boron compound by employing a heavy ion microbeam. High resolution X-ray spectroscopy following micro-PIXE (Particle Induced X-ray Emission with micrometer-sized beams) with a focused (16)O ion beam was used. Focusing was performed with a heavy-ion scanning high-precision magnetic quadrupole triplet microprobe. Squamous Cell Carcinomas were induced on the right Cheek Pouch of Syrian Hamsters (HCP), sampled, cryo-sectioned and freeze-dried. Two-dimensional maps of elemental concentration were obtained by scanning the beam over the samples. Very non-uniform Cu concentrations were found in all sections.
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Affiliation(s)
- P Stoliar
- Departamento de Física, Argentine Atomic Energy Commission, CNEA, Av. Gral. Paz 1499, CP 1650, Bienos Aires, Villa Martelli, Argentina
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Carattino MD, Peralta S, Pérez-Coll C, Naab F, Burlón A, Kreiner AJ, Preller AF, de Schroeder TMF. Effects of long-term exposure to Cu2+ and Cd2+ on the pentose phosphate pathway dehydrogenase activities in the ovary of adult Bufo arenarum: possible role as biomarker for Cu2+ toxicity. Ecotoxicol Environ Saf 2004; 57:311-318. [PMID: 15041254 DOI: 10.1016/s0147-6513(03)00081-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2002] [Revised: 04/24/2003] [Accepted: 04/28/2003] [Indexed: 05/24/2023]
Abstract
The effects of copper and cadmium on metabolism through the pentose phosphate pathway were evaluated in Bufo arenarum toad ovary. The effects of the two metals on dehydrogenases from this pathway were evaluated by three experiments: (1) in samples obtained from control females with addition of the metals to the reaction mixture (in vitro), (2) in samples obtained from control females and after long-term exposure of females to 4 and 100 microg/L of Cu or Cd in the incubation media (in vitro after exposure to the metals in vivo), and (3) 14CO2 production through the pentose phosphate pathway was evaluated after [U-14C]glucose microinjection on ovulated oocytes (in vivo after microinjection of the metals). Results from (1) evidenced inhibition of both enzyme activities but only above 1.5 mM Cu and Cd added to the reaction mixture. In (2) both glucose 6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase activities decreased in samples from the ovaries of females exposed in vivo to Cu, in a concentration-dependent manner (up to 90% in females exposed to 100 microg/L Cu: 2.12 +/- 1.57 NADPH micromol/min microg protein x 10(-5) vs 19.97 +/- 8.54 in control females). Cd treatment of the toads only rendered an inhibitory effect on 6-phosphogluconate dehydrogenase activity after exposure to 4 microg/L of the bivalent cation. (3) In vivo 14CO2 evolution significantly decreased in oocytes coinjected with 6.3 x 10(-3) mM Cu (calculated intracellular final concentration of the metal injected) and radioactive glucose. Cu and Cd concentration in samples from exposed females were always under detection limit by particle-induced X-ray emission. The results presented here are in agreement with a role for both glucose 6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase activities determination as biomarkers of effect and exposure for Cu but not for Cd toxicity.
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Affiliation(s)
- Marcelo D Carattino
- Escuela de Ciencia y Tecnología, Universidad Nacional de General San Martín, Alem 3901, 1653 Villa Ballester, Buenos Aires, Argentina
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Di Giorgio M, Edwards AA, Moquet JE, Finnon P, Hone PA, Lloyd DC, Kreiner AJ, Schuff JA, Tajal MR, Vallerga MB, López FO, Burlón A, Debray ME, Valda A. Chromosome aberrations induced in human lymphocytes by heavy charged particles in track segment mode. Radiat Prot Dosimetry 2004; 108:47-53. [PMID: 14974604 DOI: 10.1093/rpd/nch012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Human blood was irradiated with accelerated ions: 20 MeV 4He, 425 MeV 12C and 1480 MeV and 996 MeV 16O. For each ion, the blood was exposed to a range of doses as thin specimens in the track segment mode, so that irradiations took place at nearly constant LETs of 31.4, 61, 52 and 69 keV microm(-1), respectively. Lymphocytes were cultured to the first in vitro metaphase, analysed for chromosomal damage and the dicentric aberration frequencies fitted to the linear quadratic model of dose-response. For these high LET radiations, the linear (alpha) yield coefficient predominated and increased with LET, at least up to 60 keV microm(-1). Apart from the 996 MeV oxygen ions, the data indicated the presence of a quadratic (beta) coefficient, statistically consistent with values obtained with low LET radiations. However, the associated uncertainties on the measured beta values were large, illustrating the general problem that beta is more difficult to measure against a dominating and ever-increasing alpha term. The existence or otherwise of a beta component of the dose-response at these radiation qualities has important consequences for modelling mechanisms of aberration induction by radiation.
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Affiliation(s)
- M Di Giorgio
- Autoridad Regulatoria Nuclear, Av. Del Libertador 8250, CP: C1429BNP, Ciudad de Buenos Aires, Argentina
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Tasat DR, Mancuso R, Molinari BL, Saint-Martin G, Pérez de la Hoz A, Bernaola OA, Kreiner AJ, Schuff JA, Palmieri M, Mazal A, Stoliar P, Burlón A, Davidson M, Davidson J, Debray ME, Kesque JM, Somacal H, Naab G, Ozafrán MJ, Vazquez ME. Low energy proton irradiation effects on alveolar macrophages from young and aged rats. Cell Mol Biol (Noisy-le-grand) 2003; 49 Online Pub:OL387-92. [PMID: 14995066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
A prospective study was undertaken to assess the radiotoxicity of accelerated particles in pulmonary alveolar macrophages (AM). We evaluated the effects of a single dose (10-75 Gy) of an external low-energy (20 MeV) proton beam on cultured AM oxidative metabolism and phagocytic function. Macrophages are the first line of defense against invading pathogens and are known to generate superoxide anion (O2), nitric oxide (NO), and mediators of antimicrobial and antitumoral defense mechanisms. We obtained AM by bronchoalveolar lavage from young (1-2 month old) and aged (9-12 month old) male Wistar rats. Cell viability, phagocytosis, O2 and NO production in control and proton-irradiated cultured AM were evaluated The effect of proton irradiation on cell viability was dose-dependent The higher doses induced a dramatic decrease in viability in the aged population. Phagocytosis increased 1.3-1.4 fold inboth populations irrespective of the dose delivered. Generation of O2 was always higher in the aged population for all the doses assayed and showed no significant variation from the control values. In the young population a clear increase was observed with doses of 25 and 50 Gy. NO production in AM from young animals rose in a dose-dependent manner. Conversely, proton irradiation did not affect NO production in macrophages from aged animals. The results of this study demonstrate that AM isolated from young and aged rats are functionally different and show a distinct behavior when exposed to proton irradiation. These findings suggest that age may condition response and must be taken into account when accelerated particle-radiotherapy protocols are considered as a valid therapeutic option for the treatment of cancer. To the best of our knowledge, this is the first report comparing sham-irradiated and proton-irradiated young and aged AM.
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Affiliation(s)
- D R Tasat
- School of Science and Technology, National University of General San Martin, Alem 3901 (1651) San Andrés, Buenos Aires, Argentina.
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Naab F, Volcomirsky M, Burlón A, Caraballo ME, Debray M, Kesque JM, Kreiner AJ, Ozafrán MJ, Schuff JA, Stoliar P, Vázquez ME, Davidson J, Davidson M, Fonovich de Schroeder TM. Metabolic alterations without metal accumulation in the ovary of adult Bufo arenarum females, observed after long-term exposure to Zn(2+), followed by toxicity to embryos. Arch Environ Contam Toxicol 2001; 41:201-207. [PMID: 11462144 DOI: 10.1007/s002440010238] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2000] [Accepted: 03/06/2001] [Indexed: 05/23/2023]
Abstract
Long-term exposure of aquatic organisms to metals, even those considered micronutrients, may affect their metabolism and produce sublethal effects. We evaluated the effects of long-term exposure of adult amphibian (Bufo arenarum) females to 4 microg/L of Zn(2+) (ZnSO(4) x H(2)O) in Ringer solution on the concentration of Zn and Fe, the activity of the key enzyme of the pentose phosphate pathway glucose 6-phosphate dehydrogenase, and glutathione content, both in the liver and ovary of these animals. We also performed early embryonic development studies by in vitro insemination from control and treated females. Zn exposure rendered lower Zn concentrations in the ovaries than did exposure of animals to Ringer solution without metal addition (97 +/- 50 versus 149 +/- 46 Zn microg/wet tissue g). Zn and Fe concentration correlation was positive and linear in the ovary, but was negative and nonlinear in the liver of the studied females. The activity of the enzyme glucose 6-phosphate dehydrogenase decreased (0.0599 +/- 0.0109 versus 0.0776 +/- 0.0263 micromol of NADPH/min x mg of proteins) and the endogenous glutathione content increased (0.027 +/- 0.005 versus 0.018 +/- 0.007 mg/10 mg of proteins) in the ovary but remained unaltered in the liver as a consequence of Zn treatment. Our results suggest the existence of different mechanisms of regulation of Zn and Fe concentrations in the ovary and in the liver of adult B. arenarum females. Binding of Zn to low-molecular-weight proteins, as metallothioneins, may occur in the liver, thus protecting this organ from toxic effects. In the ovary high-molecular-weight proteins, like glucose-6-phosphate dehydrogenase, should be able to bind Zn, leading to oxidative stress responsible for the observed increase in endogenous glutathione content. Inhibition of the pentose phosphate pathway in the ovary by Zn can be responsible for the reproductive failure that we detected through embryos survival studies during early life stages: 81.3 +/- 6.3% of embryos from control females survived versus 63.1 +/- 13.8% of embryos from Zn-treated females at the branchial circulation stage of development.
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Affiliation(s)
- F Naab
- Comisión Nacional de Energia Atómica, Centro Atómico Constituyentes, (1650) San Martin, Argentina
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Burlon AA, Kreiner AJ, White SM, Blackburn BW, Gierga DP, Yanch JC. In-phantom dosimetry for the 13C(d,n)14N reaction as a source for accelerator-based BNCT. Med Phys 2001; 28:796-803. [PMID: 11393475 DOI: 10.1118/1.1368879] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The use of the 13C(d,n) 14N reaction at Ed=1.5 MeV for accelerator-based boron neutron capture therapy (AB-BNCT) is investigated. Among the deuteron-induced reactions at low incident energy, the 3C(d,n)14N reaction turns out to be one of the best for AB-BNCT because of beneficial materials properties inherent to carbon and its relatively large neutron production cross section. The deuteron beam was produced by a tandem accelerator at MIT's Laboratory for Accelerator Beam Applications (LABA) and the neutron beam shaping assembly included a heavy water moderator and a lead reflector. The resulting neutron spectrum was dosimetrically evaluated at different depths inside a water-filled brain phantom using the dual ionization chamber technique for fast neutrons and photons and bare and cadmium-covered gold foils for the thermal neutron flux. The RBE doses in tumor and healthy tissue were calculated from experimental data assuming a tumor 10B concentration of 40 ppm and a healthy tissue 10B concentration of 11.4 ppm (corresponding to a reported ratio of 3.5:1). All results were simulated using the code MCNP, a general Monte Carlo radiation transport code capable of simulating electron, photon, and neutron transport. Experimental and simulated results are presented at 1, 2, 3, 4, 6, 8, and 10 cm depths along the brain phantom centerline. An advantage depth of 5.6 cm was obtained for a treatment time of 56 min assuming a 4 mA deuteron current and a maximum healthy tissue dose of 12.5 RBE Gy.
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Affiliation(s)
- A A Burlon
- Departamento de Física, Comision Nacional de Energía Atómica, San Martin, Argentina.
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Ibrahim F, Hojman D, Kreiner AJ, Roussière B, Sauvage J, Bourgeois C, Korichi A, Davidson J, Davidson M, Debray M, Deloncle I, Knipper A, Marguier G, Oms J, Perrin N, Porquet MG, Sergolle H, Somacal H. Rotational high spin structures in doubly-odd 184Au. Phys Rev C Nucl Phys 1996; 53:1547-1556. [PMID: 9971101 DOI: 10.1103/physrevc.53.1547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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18
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Kreiner AJ, Cardona MA, Somacal H, Debray ME, Hojman D, Davidson J, Davidson M, Napoli DR, Rico J, Bazzacco D, Burch R, Lenzi SM, Blasi N. Pseudospin flip in doubly decoupled structures and identical bands. Phys Rev C Nucl Phys 1994; 50:R530-R533. [PMID: 9969778 DOI: 10.1103/physrevc.50.r530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Debray ME, Kreiner AJ, Kesque JM, Ozafran M, Romo A, Somacal H, Vazquez ME, Davidson J, Davidson M, Ahn K, Fossan DB, Liang Y, Ma R, Paul ES, Piel WF, Xu N. Near yrast states in doubly odd 214Fr. Phys Rev C Nucl Phys 1993; 48:2246-2251. [PMID: 9969077 DOI: 10.1103/physrevc.48.2246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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20
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Hojman D, Kreiner AJ, Davidson M. Rotational structures in 174Ta and "identical bands" in the normal deformation regime. Phys Rev C Nucl Phys 1992; 46:1203-1208. [PMID: 9968229 DOI: 10.1103/physrevc.46.1203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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21
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Hojman D, Kreiner AJ, Davidson M, Davidson J, Debray M, Cybulska EW, Pascholati P, Seale WA. High-spin states in 166Lu. Phys Rev C Nucl Phys 1992; 45:90-102. [PMID: 9967738 DOI: 10.1103/physrevc.45.90] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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22
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Porquet M, Kreiner AJ, Hannachi F, Vanin V, Bastin G, Bourgeois C, Davidson J, Debray M, Falcone G, Korichi A, Mosca H, Perrin N, Sergolle H, Beck FA, Merdinger J. High-spin structure of 189Tl: Role of h9/2 protons in the prolate minimum of light Hg isotopes. Phys Rev C Nucl Phys 1991; 44:2445-2450. [PMID: 9967676 DOI: 10.1103/physrevc.44.2445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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23
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Kreiner AJ, Macchiavelli AO. Coupling schemes in doubly odd nuclei and identical superdeformed bands. Phys Rev C Nucl Phys 1990; 42:1822-1824. [PMID: 9966922 DOI: 10.1103/physrevc.42.r1822] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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24
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Kreiner AJ, Davidson J, Davidson M, Thieberger P, Warburton EK. Rotational structures in 181,182,183Ir. Phys Rev C Nucl Phys 1990; 42:878-889. [PMID: 9966802 DOI: 10.1103/physrevc.42.878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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25
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Debray ME, Davidson J, Davidson M, Kreiner AJ, Hojman D, Santos D, Ahn K, Fossan DB, Liang Y, Ma R, Paul ES, Piel WF, Xu N. Evidence for the onset of reflection asymmetry in 216Fr. Phys Rev C Nucl Phys 1990; 41:1895-1898. [PMID: 9966553 DOI: 10.1103/physrevc.41.r1895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kreiner AJ, Vanin VR, Beck FA, Bourgeois C, Byrski T, Curien D, Duchne G, Haas B, Merdinger JC, Porquet MG, Romain P, Rouabah S, Santos D, Vivien JP. Double blocking in doubly odd deformed nuclei: The case of 178Re. Phys Rev C Nucl Phys 1989; 40:487-490. [PMID: 9966006 DOI: 10.1103/physrevc.40.r487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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27
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Debray ME, Davidson M, Kreiner AJ, Davidson J, Falcone G, Hojman D, Santos D. Alternating parity structure in doubly odd 218Ac. Phys Rev C Nucl Phys 1989; 39:1193-1196. [PMID: 9955322 DOI: 10.1103/physrevc.39.1193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Santos D, Kreiner AJ, Davidson J, Davidson M, Debray M, Hojman D, Falcone G. Rotational bands in doubly odd 176,178Re. Phys Rev C Nucl Phys 1989; 39:902-910. [PMID: 9955281 DOI: 10.1103/physrevc.39.902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kreiner AJ, Davidson J, Davidson M, Mosca H, Riedinger LL, Bingham CR, Guidry MW, Kahler AC. Shape coexistence in 189Tl. Phys Rev C Nucl Phys 1988; 38:2674-2680. [PMID: 9955109 DOI: 10.1103/physrevc.38.2674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kreiner AJ. Semidecoupling in doubly odd deformed nuclei. Phys Rev C Nucl Phys 1988; 38:2486-2487. [PMID: 9955089 DOI: 10.1103/physrevc.38.2486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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31
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Shi S, Beausang CW, Fossan DB, Ma R, Paul ES, Xu N, Kreiner AJ. Weak and strong signature splitting in doubly-odd 132Pr. Phys Rev C Nucl Phys 1988; 37:1478-1484. [PMID: 9954601 DOI: 10.1103/physrevc.37.1478] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kreiner AJ, Davidson J, Davidson M, Abriola D, Pomar C, Thieberger P. Erratum: Band structure in 180Re and the different coupling schemes in a deformed doubly odd nucleus. Phys Rev C Nucl Phys 1988; 37:1338-1340. [PMID: 9954579 DOI: 10.1103/physrevc.37.1338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kreiner AJ, Davidson J, Davidson M, Abriola D, Pomar C, Thieberger P. Band structure in 180Re and the different coupling schemes in a deformed doubly odd nucleus. Phys Rev C Nucl Phys 1987; 36:2309-2321. [PMID: 9954353 DOI: 10.1103/physrevc.36.2309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Bizzeti-Sona AM, Blasi P, Stefanini AA, Kreiner AJ. High spin states in 98Tc via the 94Zr(7Li,3n)98Tc reaction. Phys Rev C Nucl Phys 1987; 36:2330-2340. [PMID: 9954355 DOI: 10.1103/physrevc.36.2330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Kreiner AJ, Hojman D. Evidence for predicted level crossing in doubly decoupled structures. Phys Rev C Nucl Phys 1987; 36:2173-2176. [PMID: 9954339 DOI: 10.1103/physrevc.36.2173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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36
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Kreiner AJ, Pomar C. Two nuclear phases and the proton-neutron force. Phys Rev C Nucl Phys 1987; 36:463-466. [PMID: 9954099 DOI: 10.1103/physrevc.36.463] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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37
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Kreiner AJ, Thieberger P, Warburton EK. Doubly decoupled structures in 182,184Ir. Phys Rev C Nucl Phys 1986; 34:1150-1152. [PMID: 9953566 DOI: 10.1103/physrevc.34.1150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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