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Lee MG, Lee KS, Nam KS. The association of changes in RAD51 and survivin expression levels with the proton beam sensitivity of Capan‑1 and Panc‑1 human pancreatic cancer cells. Int J Oncol 2018; 54:744-752. [PMID: 30483758 DOI: 10.3892/ijo.2018.4642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Accepted: 11/11/2018] [Indexed: 11/05/2022] Open
Abstract
Fewer than 20% of patients diagnosed with pancreatic cancer can be treated with surgical resection. The effects of proton beam irradiation were evaluated on the cell viabilities in Panc‑1 and Capan‑1 pancreatic cancer cells. The cells were irradiated with proton beams at the center of Bragg peaks with a 6‑cm width using a proton accelerator. Cell proliferation was assessed with the MTT assay, gene expression was analyzed with semi‑quantitative or quantitative reverse transcription‑polymerase chain reaction analyses and protein expression was evaluated by western blotting. The results demonstrated that Capan‑1 cells had lower cell viability than Panc‑1 cells at 72 h after proton beam irradiation. Furthermore, the cleaved poly (ADP‑ribose) polymerase protein level was increased by irradiation in Capan‑1 cells, but not in Panc‑1 cells. Additionally, it was determined that histone H2AX phosphorylation in the two cell lines was increased by irradiation. Although a 16 Gy proton beam was only slightly up‑regulated cyclin‑dependent kinase inhibitor 1 (p21) protein expression in Capan‑1 cells, p21 expression levels in Capan‑1 and Panc‑1 cells were significantly increased at 72 h after irradiation. Furthermore, it was observed that the expression of DNA repair protein RAD51 homolog 1 (RAD51), a homogenous repair enzyme, was decreased in what appeared to be a dose‑dependent manner by irradiation in Capan‑1 cells. Contrastingly, the transcription of survivin in Panc‑1 was significantly enhanced. The results suggest that RAD51 and survivin are potent markers that determine the therapeutic efficacy of proton beam therapy in patients with pancreatic cancer.
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Affiliation(s)
- Min-Gu Lee
- Department of Pharmacology and Intractable Disease Research Center, School of Medicine, Dongguk University, Gyeongju, Gyeongsanbuk-do 38066, Republic of Korea
| | - Kyu-Shik Lee
- Department of Pharmacology and Intractable Disease Research Center, School of Medicine, Dongguk University, Gyeongju, Gyeongsanbuk-do 38066, Republic of Korea
| | - Kyung-Soo Nam
- Department of Pharmacology and Intractable Disease Research Center, School of Medicine, Dongguk University, Gyeongju, Gyeongsanbuk-do 38066, Republic of Korea
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Rabhi N, Batani D, Boutoux G, Ducret JE, Jakubowska K, Lantuejoul-Thfoin I, Nauraye C, Patriarca A, Saïd A, Semsoum A, Serani L, Thomas B, Vauzour B. Calibration of imaging plate detectors to mono-energetic protons in the range 1-200 MeV. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2017; 88:113301. [PMID: 29195357 DOI: 10.1063/1.5009472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Responses of Fuji Imaging Plates (IPs) to proton have been measured in the range 1-200 MeV. Mono-energetic protons were produced with the 15 MV ALTO-Tandem accelerator of the Institute of Nuclear Physics (Orsay, France) and, at higher energies, with the 200-MeV isochronous cyclotron of the Institut Curie-Centre de Protonthérapie d'Orsay (Orsay, France). The experimental setups are described and the measured photo-stimulated luminescence responses for MS, SR, and TR IPs are presented and compared to existing data. For the interpretation of the results, a sensitivity model based on the Monte Carlo GEANT4 code has been developed. It enables the calculation of the response functions in a large energy range, from 0.1 to 200 MeV. Finally, we show that our model reproduces accurately the response of more complex detectors, i.e., stack of high-Z filters and IPs, which could be of great interest for diagnostics of Petawatt laser accelerated particles.
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Affiliation(s)
- N Rabhi
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - D Batani
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - G Boutoux
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - J-E Ducret
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | - K Jakubowska
- CELIA (Centre Lasers Intenses et Applications), Université Bordeaux, CNRS, CEA, UMR 5107, F-33405 Talence, France
| | | | - C Nauraye
- Institut Curie, Centre de Protonthérapie d'Orsay-Campus Universitaire, Bâtiment 101, 15, rue Georges Clémenceau, F-91898 Orsay Cedex, France
| | - A Patriarca
- Institut Curie, Centre de Protonthérapie d'Orsay-Campus Universitaire, Bâtiment 101, 15, rue Georges Clémenceau, F-91898 Orsay Cedex, France
| | - A Saïd
- Institut de Physique Nucléaire d'Orsay, 15, rue Georges Clémenceau, F-91405 Orsay Cedex, France
| | - A Semsoum
- Institut de Physique Nucléaire d'Orsay, 15, rue Georges Clémenceau, F-91405 Orsay Cedex, France
| | - L Serani
- Centre d'Etudes Nucléaires de Bordeaux Gradignan, Université de Bordeaux, UMR 5797 CNRS/IN2P3, 19, Chemin du Solarium, Gradignan F-33175, France
| | - B Thomas
- Centre d'Etudes Nucléaires de Bordeaux Gradignan, Université de Bordeaux, UMR 5797 CNRS/IN2P3, 19, Chemin du Solarium, Gradignan F-33175, France
| | - B Vauzour
- CEA DAM DIF, F-91297 Arpajon, France
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Quétin P, Meyer L, Schumacher C, Polto F, Magnenet P, Andres E, Sahel J, Schraub S. [Conservative treatment of choroidal melanoma using iodine-125 brachytherapy, technique and preliminary analysis of 78 patients]. Cancer Radiother 2001; 5:737-42. [PMID: 11797294 DOI: 10.1016/s1278-3218(01)00134-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
PURPOSE Iodine 125 curietherapy is one of the conservative treatments of uveal melanoma. The technique used to achieve these results was simplified through the physical characteristics of the radioelement and the optimized-dosimetry program employed. PATIENTS AND METHODS 78 patients with choroidal melanoma were treated with iodine 125. About 100 Gy were delivered to the superior pole of the tumour. The minimal length of follow-up was 17 months and the average, 67 months. RESULTS There was 88% local control, leading to lowered visual acuity in 76% of the cases. Radiation retinopathy, directly related to proximity to the macula, is the principle etiology. Seven patients died of hepatic metastasis, five patients were enucleated. Four patients were further treated with protontherapy to make up for noncontrol locally. CONCLUSION One dose of 100 Gy to the superior pole of the tumor seemed to lead to good local control, with the exception of complications related to proximity to the macula and the optic nerve. In this attempt to optimize irradiation, the time lapse between any benefit in local control derived from irradiation and posttherapeutic complications observed remains insufficient to evaluate any relationship.
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Affiliation(s)
- P Quétin
- Département de radiothérapie, centre Paul-Strauss, 3, rue de la Porte-de-l'Hôpital, 67085 Strasbourg, France
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