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Trivillin VA, Bruno LJ, Gatti DA, Stur M, Garabalino MA, Hughes AM, Castillo J, Pozzi ECC, Wentzeis L, Scolari H, Schwint AE, Feldman S. Boron neutron capture synovectomy (BNCS) as a potential therapy for rheumatoid arthritis: radiobiological studies at RA-1 Nuclear Reactor in a model of antigen-induced arthritis in rabbits. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2016; 55:467-475. [PMID: 27568399 DOI: 10.1007/s00411-016-0664-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Accepted: 08/17/2016] [Indexed: 06/06/2023]
Abstract
Rheumatoid arthritis is a chronic autoimmune pathology characterized by the proliferation and inflammation of the synovium. Boron neutron capture synovectomy (BNCS), a binary treatment modality that combines the preferential incorporation of boron carriers to target tissue and neutron irradiation, was proposed to treat the pathological synovium in arthritis. In a previous biodistribution study, we showed the incorporation of therapeutically useful boron concentrations to the pathological synovium in a model of antigen-induced arthritis (AIA) in rabbits, employing two boron compounds approved for their use in humans, i.e., decahydrodecaborate (GB-10) and boronophenylalanine (BPA). The aim of the present study was to perform low-dose BNCS studies at the RA-1 Nuclear Reactor in the same model. Neutron irradiation was performed post intra-articular administration of BPA or GB-10 to deliver 2.4 or 3.9 Gy, respectively, to synovium (BNCS-AIA). AIA and healthy animals (no AIA) were used as controls. The animals were followed clinically for 2 months. At that time, biochemical, magnetic resonance imaging (MRI) and histological studies were performed. BNCS-AIA animals did not show any toxic effects, swelling or pain on palpation. In BNCS-AIA, the post-treatment levels of TNF-α decreased in four of six rabbits and IFN-γ levels decreased in five of six rabbits. In all cases, MRI images of the knee joint in BNCS-AIA resembled those of no AIA, with no necrosis or periarticular effusion. Synovial membranes of BNCS-AIA were histologically similar to no AIA. BPA-BNCS and GB-10-BNCS, even at low doses, would be therapeutically useful for the local treatment of rheumatoid arthritis.
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Affiliation(s)
- Verónica A Trivillin
- Department of Radiobiology, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina.
| | - Leandro J Bruno
- LABOATEM (Laboratorio de Biología Osteoarticular, Ingeniería Tisular y Terapias Emergentes), Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Rosario, Argentina
| | - David A Gatti
- LABOATEM (Laboratorio de Biología Osteoarticular, Ingeniería Tisular y Terapias Emergentes), Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Mariela Stur
- Cátedra de Diagnóstico por Imágenes, Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Rosario, Argentina
| | - Marcela A Garabalino
- Department of Radiobiology, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina
| | - Andrea Monti Hughes
- Department of Radiobiology, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina
| | - Jorge Castillo
- Department of Reactors, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina
| | - Emiliano C C Pozzi
- Department of Research and Production Reactors, Comisión Nacional de Energía Atómica (CNEA), Presbítero Juan González y Aragon 15, B1802AYA, Ezeiza, Province Buenos Aires, Argentina
| | - Luis Wentzeis
- Department of Reactors, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina
| | - Hugo Scolari
- Department of Reactors, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina
| | - Amanda E Schwint
- Department of Radiobiology, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martín, Provincia Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
| | - Sara Feldman
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Argentina
- LABOATEM (Laboratorio de Biología Osteoarticular, Ingeniería Tisular y Terapias Emergentes), Facultad de Ciencias Médicas, Universidad Nacional de Rosario, Rosario, Argentina
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Trivillin VA, Abramson DB, Bumaguin GE, Bruno LJ, Garabalino MA, Monti Hughes A, Heber EM, Feldman S, Schwint AE. Boron neutron capture synovectomy (BNCS) as a potential therapy for rheumatoid arthritis: boron biodistribution study in a model of antigen-induced arthritis in rabbits. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2014; 53:635-643. [PMID: 25156017 DOI: 10.1007/s00411-014-0564-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 08/14/2014] [Indexed: 06/03/2023]
Abstract
Boron neutron capture synovectomy (BNCS) is explored for the treatment of rheumatoid arthritis (RA). The aim of the present study was to perform boron biodistribution studies in a model of antigen-induced arthritis (AIA) in female New Zealand rabbits, with the boron carriers boronophenylalanine (BPA) and sodium decahydrodecaborate (GB-10) to assess the potential feasibility of BNCS for RA. Rabbits in chronic phase of AIA were used for biodistribution studies employing the following protocols: intra-articular (ia) (a) BPA-f 0.14 M (0.7 mg (10)B), (b) GB-10 (5 mg (10)B), (c) GB-10 (50 mg (10)B) and intravenous (iv), (d) BPA-f 0.14 M (15.5 mg (10)B/kg), (e) GB-10 (50 mg (10)B/kg), and (f) BPA-f (15.5 mg (10)B/kg) + GB-10 (50 mg (10)B/kg). At different post-administration times (13-85 min for ia and 3 h for iv), samples of blood, pathological synovium (target tissue), cartilage, tendon, muscle, and skin were taken for boron measurement by inductively coupled plasma mass spectrometry. The intra-articular administration protocols at <40 min post-administration both for BPA-f and GB-10, and intravenous administration protocols for GB-10 and [GB-10 + BPA-f] exhibited therapeutically useful boron concentrations (>20 ppm) in the pathological synovium. Dosimetric estimations suggest that BNCS would be able to achieve a therapeutically useful dose in pathological synovium without exceeding the radiotolerance of normal tissues in the treatment volume, employing boron carriers approved for use in humans. Radiobiological in vivo studies will be necessary to determine the actual therapeutic efficacy of BNCS to treat RA in an experimental model.
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Affiliation(s)
- Verónica A Trivillin
- Department of Radiobiology, Comisión Nacional de Energía Atómica (CNEA), Avenida General Paz 1499, B1650KNA, San Martin, Provincia de Buenos Aires, Argentina,
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Sivaev IB, Bregadze VV. Polyhedral Boranes for Medical Applications: Current Status and Perspectives. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900003] [Citation(s) in RCA: 287] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Igor B. Sivaev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., Moscow 119991, Russia, Fax: +7‐499‐1355085
| | - Vladimir V. Bregadze
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilov Str., Moscow 119991, Russia, Fax: +7‐499‐1355085
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Zhu X, Clackdoyle R, Shortkroff S, Yanch J. In vivo prompt gamma neutron activation analysis for the screening of boron-10 distribution in a rabbit knee: a simulation study. Phys Med Biol 2008; 53:2715-32. [PMID: 18445874 DOI: 10.1088/0031-9155/53/10/018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Boron neutron capture synovectomy (BNCS) is under development as a potential treatment modality for rheumatoid arthritis (RA). RA is characterized by the inflammation of the synovium (the membrane lining articular joints), which leads to pain and a restricted range of motion. BNCS is a two-part procedure involving the injection of a boronated compound directly into the diseased joint followed by irradiation with a low-energy neutron beam. The neutron capture reactions taking place in the synovium deliver a local, high-linear energy transfer (LET) dose aimed at destroying the inflamed synovial membrane. For successful treatment via BNCS, a boron-labeled compound exhibiting both high synovial uptake and long retention time is necessary. Currently, the in vivo uptake behavior of potentially useful boronated compounds is evaluated in the knee joints of rabbits in which arthritis has been induced. This strategy involves the sacrifice and dissection of a large number of animals. An in vivo (10)B screening approach is therefore under investigation with the goal of significantly reducing the number of animals needed for compound evaluation via dissection studies. The 'in vivo prompt gamma neutron activation analysis' (IVPGNAA) approach uses a narrow neutron beam to irradiate the knee from several angular positions following the intra-articular injection of a boronated compound whose uptake characteristics are unknown. A high-purity germanium detector collects the 478 keV gamma photons produced by the (10)B capture reactions. The (10)B distribution in the knee is then reconstructed by solving a system of simultaneous equations using a weighted least squares algorithm. To study the practical feasibility of IVPGNAA, simulation data were generated with the Monte Carlo N-particle transport code. The boron-containing region of a rabbit knee was partitioned into 8 compartments, and the (10)B prompt gamma signals were tallied from 16 angular positions. Results demonstrate that for this level of spatial resolution, an estimate of (10)B distribution inside the joint can be obtained to within 10% uncertainty, under ideal conditions. Variations of the anatomic dimensions among individual rabbit knees and potential knee positioning errors will result in an uncertainty of over 20%. IVPGNAA thus provides sufficient resolution and quantification regarding the in vivo uptake characteristics of boronated pharmaceuticals to serve as a useful means of screening new compounds of potential use in BNCS.
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Affiliation(s)
- X Zhu
- Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA
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