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Sors A, Dudouet P, Franck D, Macé M, Boucarut P, Boutry C. PO-0890: EPID for QA and pre-treatment verification of electron beams in absolute dose using EpiDream method. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)31200-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Chaumette T, Chapuy E, Berrocoso E, Llorca-Torralba M, Bravo L, Mico JA, Chalus M, Eschalier A, Ardid D, Marchand F, Sors A. Effects of S 38093, an antagonist/inverse agonist of histamine H3 receptors, in models of neuropathic pain in rats. Eur J Pain 2017; 22:127-141. [PMID: 28877402 DOI: 10.1002/ejp.1097] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/30/2017] [Indexed: 11/08/2022]
Abstract
BACKGROUND Histamine H3 receptors are mainly expressed on CNS neurons, particularly along the nociceptive pathways. The potential involvement of these receptors in pain processing has been suggested using H3 receptor inverse agonists. METHODS The antinociceptive effect of S 38093, a novel inverse agonist of H3 receptors, has been evaluated in several neuropathic pain models in rat and compared with those of gabapentin and pregabalin. RESULTS While S 38093 did not change vocalization thresholds to paw pressure in healthy rats, it exhibited a significant antihyperalgesic effect in the Streptozocin-induced diabetic (STZ) neuropathy model after acute and chronic administration and, in the chronic constriction injury (CCI) model only after chronic administration, submitted to the paw-pressure test. Acute S 38093 administration at all doses tested displayed a significant cold antiallodynic effect in a model of acute or repeated administration of oxaliplatin-induced neuropathy submitted to cold tail immersion, cold allodynia being the main side effect of oxaliplatin in patients. The effect of S 38093 increased following chronic administration (i.e. twice a day during 5 days) in the CCI and STZ models except in the oxaliplatin models where its effect was already maximal from the first administration The kinetics and size of effect of S 38093 were similar to gabapentin and/or pregabalin. Finally, the antinociceptive effect of S 38093 could be partially mediated by α2 adrenoreceptors desensitization in the locus coeruleus. CONCLUSIONS These results highlight the interest of S 38093 to relieve neuropathic pain and warrant clinical trials especially in chemotherapeutic agent-induced neuropathic pain. SIGNIFICANCE S 38093, a new H3 antagonist/inverse agonist, displays antiallodynic and antihyperalgesic effect in neuropathic pain, especially in oxaliplatin-induced neuropathy after chronic administration. This effect of S 38093 in neuropathic pain could be partly mediated by α2 receptors desensitization in the locus coeruleus.
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Affiliation(s)
- T Chaumette
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - E Chapuy
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - E Berrocoso
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain
| | - M Llorca-Torralba
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - L Bravo
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - J A Mico
- Neuropsychopharmacology and Psychobiology Research Laboratory, University of Cádiz, Spain.,Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Instituto de Salud Carlos III, Madrid, Spain.,Instituto de Investigación e Innovación en Ciencias Biomédicas de Cádiz, INiBICA, Hospital Universitario Puerta del Mar, Cádiz, Spain
| | - M Chalus
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - A Eschalier
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - D Ardid
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - F Marchand
- Université Clermont Auvergne, Inserm U1107 Neuro-Dol, Pharmacologie Fondamentale et Clinique de la Douleur, Clermont-Ferrand, France
| | - A Sors
- Institut de Recherches Internationales Servier (I.R.I.S.), Suresnes Cedex, France
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Sors A, Dudouet P, Franck D, Boutry C. 26. Evaluation of the EpiDream method for quality assurance (QA) of electron beams using a Varian electronic portal imaging device (EPID). Phys Med 2016. [DOI: 10.1016/j.ejmp.2016.11.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Sors A, Cassol E, Latorzeff I, Duthil P, Sabatier J, Lotterie JA, Redon A, Berry I, Franceries X. In-vivo dosimetry for field sizes down to 6 × 6 mm2 in shaped beam radiosurgery with microMOSFET. Phys Med 2014; 30:696-701. [PMID: 24743040 DOI: 10.1016/j.ejmp.2014.02.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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: 05/21/2013] [Revised: 01/20/2014] [Accepted: 02/20/2014] [Indexed: 11/19/2022] Open
Abstract
The aim of this study is to evaluate microMOSFET as in-vivo dosimeter in 6 MV shaped-beam radiosurgery for field sizes down to 6 × 6 mm2. A homemade build-up cap was developed and its use with microMOSFET was evaluated down to 6 × 6 mm2. The study with the homemade build-up cap was performed considering its influence on field size over-cover occurring at surface, achievement of the overall process of electronic equilibrium, dose deposition along beam axis and dose attenuation. An optimized calibration method has been validated using MOSFET in shaped-beam radiosurgery for field sizes from 98 × 98 down to 18 × 18 mm2. The method was detailed in a previous study and validated in irregular field shapes series measurements performed on a head phantom. The optimized calibration method was applied to microMOSFET equipped with homemade build-up cap down to 6 × 6 mm2. Using the same irregular field shapes, dose measurements were performed on head phantom. MicroMOSFET results were compared to previous MOSFET ones. Additional irregular field shapes down to 8.8 × 8.8 mm2 were studied with microMOSFET. Isocenter dose attenuation due to the homemade build-up cap over the microMOSFET was near 2% irrespective of field size. Our results suggested that microMOSFET equipped with homemade build-up cap is suitable for in-vivo dosimetry in shaped-beam radiosurgery for field sizes down to 6 × 6 mm2 and therefore that the required build-up cap dimensions to perform entrance in-vivo dosimetry in small-fields have to ensure only partial charge particle equilibrium.
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Affiliation(s)
- A Sors
- Inserm Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Centre de Radiochirurgie Stéréotaxique, CHU Rangueil, Toulouse, France.
| | - E Cassol
- Inserm Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Unité de Radiophysique et de Radioprotection, CHU Toulouse, France
| | - I Latorzeff
- Centre de Radiochirurgie Stéréotaxique, CHU Rangueil, Toulouse, France; Groupe Oncorad Garonne, France
| | - P Duthil
- Unité de Radiophysique et de Radioprotection, CHU Toulouse, France
| | - J Sabatier
- Centre de Radiochirurgie Stéréotaxique, CHU Rangueil, Toulouse, France
| | - J A Lotterie
- Inserm Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Centre de Radiochirurgie Stéréotaxique, CHU Rangueil, Toulouse, France
| | - A Redon
- Centre de Radiochirurgie Stéréotaxique, CHU Rangueil, Toulouse, France; Groupe Oncorad Garonne, France
| | - I Berry
- Inserm Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Centre de Radiochirurgie Stéréotaxique, CHU Rangueil, Toulouse, France
| | - X Franceries
- Inserm Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Université de Toulouse, UPS, INPT, LAPLACE Laboratoire Plasma et Conversion d'Energie, 118 route de Narbonne, F-31062 Toulouse cedex 9, France; Université de Toulouse, UPS, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France
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Sors A, Cassol E, Latorzeff I, Duthil P, Sabatier J, Lotterie J, Redon A, Berry I, Franceries X. Inverse method for in vivo dosimetry using mosfet in conformal arctherapy for stereotactic radiosurgery. Phys Med 2013. [DOI: 10.1016/j.ejmp.2013.08.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Sors A, Cassol E, Latorzeff I, Duthil P, Sabatier J, Lotterie JA, Redon A, Berry I, Franceries X. An optimized calibration method for surface measurements with MOSFETs in shaped-beam radiosurgery. Phys Med 2013; 30:10-7. [PMID: 23623590 DOI: 10.1016/j.ejmp.2013.03.005] [Citation(s) in RCA: 6] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/06/2012] [Revised: 03/11/2013] [Accepted: 03/14/2013] [Indexed: 11/27/2022] Open
Abstract
Nowadays MOSFET dosimeters are widely used for dose verification in radiotherapy procedures. Although their sensitive area satisfies size requirements for small field dosimetry, their use in radiosurgery has rarely been reported. The aim of this study is to propose and optimize a calibration method to perform surface measurements in 6 MV shaped-beam radiosurgery for field sizes down to 18 × 18 mm(2). The effect of different parameters such as recovery time between 2 readings, batch uniformity and build-up cap attenuation was studied. Batch uniformity was found to be within 2% and isocenter dose attenuation due to the build-up cap over the MOSFET was near 2% irrespective of field size. Two sets of sensitivity coefficients (SC) were determined for TN-502RD MOSFET dosimeters using experimental and calculated calibration; the latter being developed using an inverse square law model. Validation measurements were performed on a realistic head phantom in irregular fields. MOSFET dose values obtained by applying either measured or calculated SC were compared. For calibration, optimal results were obtained for an inter-measurement time lapse of 5 min. We also found that fitting the SC values with the inverse square law reduced the number of measurements required for calibration. The study demonstrated that combining inverse square law and Sterling-Worthley formula resulted in an underestimation of up to 4% of the dose measured by MOSFETs for complex beam geometries. With the inverse square law, it is possible to reduce the number of measurements required for calibration for multiple field-SSD combinations. Our results suggested that MOSFETs are suitable sensors for dosimetry when used at the surface in shaped-beam radiosurgery down to 18 × 18 mm(2).
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Affiliation(s)
- A Sors
- Inserm, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Centre de Radiochirurgie Stéréotaxique, Biophysique Médicale - CHU Rangueil, av. J. Poulhès - TSA 50032, 31059 Toulouse Cedex 9, France.
| | - E Cassol
- Inserm, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Unité de Radiophysique et de Radioprotection, CHU Toulouse, France
| | - I Latorzeff
- Centre de Radiochirurgie Stéréotaxique, Biophysique Médicale - CHU Rangueil, av. J. Poulhès - TSA 50032, 31059 Toulouse Cedex 9, France; Groupe Oncorad Garonne, France
| | - P Duthil
- Unité de Radiophysique et de Radioprotection, CHU Toulouse, France
| | - J Sabatier
- Centre de Radiochirurgie Stéréotaxique, Biophysique Médicale - CHU Rangueil, av. J. Poulhès - TSA 50032, 31059 Toulouse Cedex 9, France
| | - J A Lotterie
- Inserm, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Centre de Radiochirurgie Stéréotaxique, Biophysique Médicale - CHU Rangueil, av. J. Poulhès - TSA 50032, 31059 Toulouse Cedex 9, France
| | - A Redon
- Centre de Radiochirurgie Stéréotaxique, Biophysique Médicale - CHU Rangueil, av. J. Poulhès - TSA 50032, 31059 Toulouse Cedex 9, France; Groupe Oncorad Garonne, France
| | - I Berry
- Inserm, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Centre de Radiochirurgie Stéréotaxique, Biophysique Médicale - CHU Rangueil, av. J. Poulhès - TSA 50032, 31059 Toulouse Cedex 9, France
| | - X Franceries
- Inserm, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France; Université de Toulouse, UPS, INPT, LAPLACE Laboratoire Plasma et Conversion d'Energie, 118 route de Narbonne, F-31062 Toulouse Cedex 9, France; Universitéde Toulouse, UPS, Imagerie cérébrale et handicaps neurologiques, UMR 825, F-31059 Toulouse, France
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Sors A, Cassol E, Latorzeff I, Duthil P, Lotterie J, Redon A, Berry I, Franceries X. Micro-mosfet For Small-field In Vivo Dosimetry In Radiosurgery? Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Camilleri J, Laprie A, Sors A, Kerjean P, Kerjean JC, Gros-Dagnac H, Moyal É, Delannes M, Franceries X. Doit-on changer la technique d’utilisation des bolus en radiothérapie des cancers cutanés ? Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Sors A, Cassol E, Hallil A, Latorzeff I, Duthil P, Lotterie JA, Redon A, Berry I, Franceries X. Optimisation de la calibration de MOSFET pour la dosimétrie in vivo en radiochirurgie : réduction des incertitudes de mesure en conditions précliniques. Cancer Radiother 2011. [DOI: 10.1016/j.canrad.2011.07.160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Sors A, Cassol E, Hallil A, Latorzeff I, Duthil P, Lotterie JA, Redon A, Berry I, Franceries X. Optimisation de la calibration de capteurs de type MOSFET pour la mise en œuvre de la dosimétrie in vivo en radiochirurgie stéréotaxique. Cancer Radiother 2010. [DOI: 10.1016/j.canrad.2010.07.474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Michel L, Pellet C, Sors A, Jean louis F, Lebart M, Courtois G, Bachelez H. C21 - Expression de la t-plastine dans les lymphomes T cutanés. Ann Dermatol Venereol 2005. [DOI: 10.1016/s0151-9638(05)79642-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Abstract
Within the framework of its' Environment Research and Development Programme, the European Communities (EC) Directorate General (DG) XII has supported a research project aimed at developing and validating assay systems for the detection and evaluation of chemicals capable of inducing numerical chromosome changes such as aneuploidy and polyploidy. A range of test chemicals were selected, which include a core set comprising; colchicine, econazole nitrate, chloral hydrate, hydroquinone, diazepam, thiabendazole, cadmium chloride, thimerosol, pyrimethamine and vinblastine sulphate. These test chemicals were used to evaluate the ability of test systems ranging from tubulin polymerisation, fungal cultures, cultured mammalian cells and intact rodents to detect chemical aneugens and to assess the significance of such activity to exposed human populations.
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Affiliation(s)
- J M Parry
- School of Biological Sciences, University College of Swansea, UK
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Sors A. Change of address. Environ Monit Assess 1982; 1:188. [PMID: 24264012 DOI: 10.1007/bf00676920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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