51
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Mukumoto N, Miyawaki D, Akasaka H, Nakayama M, Miura Y, Umetani K, Nariyama N, Shinohara K, Kondoh T, Sasaki R. Normal Tissue Tolerance of Microplanar Beam X-ray: A Long-term Observation. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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52
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Miyawaki D, Yoshida K, Ejima Y, Nishimura H, Sulaiman N, Kiyota N, Saito M, Otsuki N, Nibu K, Sasaki R. Radiation-Induced Hypothyroidism in Squamous Cell Carcinoma of the Head and Neck: Comparison Between Concurrent Chemoradiation Therapy and Radiation Therapy Alone. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.1250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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53
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Suleiman N, Yoshida K, Miyawaki D, Ejima Y, Nishimura H, Furukawa J, Fujisawa M, Sasaki R. Efficacy of Salvage Radiation Therapy in Men With Biochemical Recurrence After Radical Prostatectomy: A Comparison With Endocrine Therapy. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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54
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Otani K, Sakairi M, Sasaki R, Kaneko A, Seki Y, Nagasawa D. Effect of metal cations on corrosion behavior and surface film structure of the A3003 aluminum alloy in model tap waters. J Solid State Electrochem 2013. [DOI: 10.1007/s10008-013-2260-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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55
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Oda H, Sasaki R, Hagiwara A, Kimura A. Prediction score of indications for whole body computed tomography in blunt trauma patients. Crit Care 2013. [PMCID: PMC3642694 DOI: 10.1186/cc12232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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56
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Yamagishi K, Iso H, Kokubo Y, Saito I, Yatsuya H, Ishihara J, Inoue M, Tsugane S, Sobue T, Hanaoka T, Ogata J, Baba S, Mannami T, Okayama A, K. Y, Miyakawa K, Saito F, Koizumi A, Sano Y, Hashimoto I, Ikuta T, Tanaba Y, Miyajima Y, Suzuki N, Nagasawa S, Furusugi Y, Nagai N, Sanada H, Hatayama Y, Kobayashi F, Uchino H, Shirai Y, Kondo T, Sasaki R, Watanabe Y, Miyagawa Y, Kobayashi Y, Machida M, Kishimoto Y, Takara E, Fukuyama T, Kinjo M, Irei M, Sakiyama H, Imoto K, Yazawa H, Seo T, Seiko A, Ito F, Shoji F, Saito R, Murata A, Minato K, Motegi K, Fujieda T, Abe T, Katagiri M, Suzuki M, Matsui K, Doi M, Terao A, Ishikawa Y, Tagami T, Doi H, Urata M, Okamoto N, Ide F, Sueta H, Sakiyama H, Onga N, Takaesu H, Uehara M, Horii F, Asano I, Yamaguchi H, Aoki K, Maruyama S, Ichii M, Takano M, Matsushima S, Natsukawa S, Akabane M, Konishi M, Okada K, Honda Y, Sakurai KYS, Tsuchiya N, Sugimura H, Tsubono Y, Kabuto M, Tominaga S, Iida M, Ajiki W, Ioka A, Sato S, Yasuda N, Nakamura K, Kono S, Suzuki K, Takashima Y, Yoshida M, Maruyama E, Yamaguchi M, Matsumura Y, Sasaki S, Watanabe S, Kadowaki T, Noda M, Mizoue T, Kawaguchi Y, Shimizu H. Dietary intake of saturated fatty acids and incident stroke and coronary heart disease in Japanese communities: the JPHC Study. Eur Heart J 2013; 34:1225-32. [DOI: 10.1093/eurheartj/eht043] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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57
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Sasaki R, Takanashi N, Chigono T. Transplantation of a tooth involved in dentigerous cyst. EUROPEAN JOURNAL OF PAEDIATRIC DENTISTRY 2012; 13:342-344. [PMID: 23270297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
To salvage an uneruputed tooth within a dentigerous cyst, the retransplantation of the unerupted premolar involved in the dentigerous cyst was performed. In the present case a dentigerous cyst with the impacted maxillary second premolar of a 10-year-old boy was removed, because of the missing eruption after marsupialisation of the premolar 4 months earlier. Covering the crown and the one third of root, the cyst was removed from the tooth, and the premolar was retransplanted into a cavity created between the premolar and first molar in the maxilla. The tooth was fixed with resin and a twisted wire for 1 month. Two years after transplantation, the tooth responded positively to pulp vitality tests but did not move toward the occlusal line, and dental X-ray showed a lamina dura, mineralisation of the pulp cavity, no root resorption and development.
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Ishihara T, Yamada K, Tanahashi M, Niwa H, Matsui T, Yokomura K, Sasaki R. Stereotactic Body Radiation Therapy for Lung Cancer in Octogenarians. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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59
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Akasaka H, Sasaki R, Fukumoto T, Mukumoto N, Nakayama M, Nishimura H, Yoshida K, Miyawaki D, Yamada S, Murakami M. Efficacy of Surgically Implanted Flexible Spacer in Particle Therapy: A Novel Strategy Making Temporal Space Between Tumor and Adjacent Organs. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Fujii O, Hashimoto N, Terashima K, Mima M, Demizu Y, Niwa Y, Sasaki R, Hishikawa Y, Abe M, Murakami M. Involved-Field Radiation Therapy Using Protons or Carbon Ions for N1-2M0 Non-small Cell Lung Cancer: A Retrospective Study. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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61
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Ishihara T, Yamada K, Harada A, Isogai K, Tonosaki Y, Sasaki R. Hypofractionated Stereotactic Radiation Therapy for Brain Metastases: Exploration of Adhibition and Key Factors Involved in Local Control Rate. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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62
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Nakayama M, Sasaki R, Ogino C, Tanaka T, Umetsu M, Ohara S, Tan Z, Sato K, Numako C, Kondo A. Novel Radiosensitization Through Reactive Oxygen Species Generation Using Titanium Peroxide Nanoparticle Compounds Against Pancreas Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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63
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Nishimura H, Sasaki R, Yoshida K, Miyawaki D, Okamoto Y, Kiyota N, Saito M, Otsuki N, Nibu K. Patterns of Local Recurrence and Metachronous Malignancy Following Radiation Therapy for Stage I or II Hypopharyngeal Carcinoma: Role of Close Observation and Multidisciplinary Approach. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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64
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Shirai Y, Inagaki M, Yamaguchi M, Kambe T, Nagao M, Masuda S, Sasaki R. Effect of hypoxia duration on the oxygen-dependent production of a recombinant protein, β-galactosidase, by an animal cell line, F6D2, with a hypoxia-inducible enhancer. Cytotechnology 2012; 25:71-7. [PMID: 22358881 DOI: 10.1023/a:1007911816292] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Expression of specific genes is a strategy of animal cells for adaptation to oxygen deficiency and the mechanism underlying the hypoxic activation of gene expression may be useful for efficient production of recombinant proteins by animal cells, because oxygen is a limiting factor in animal cell cultures. We prepared an animal cell line harboring the plasmid in which expression of a reporter gene, β-galactosidase, is controlled by an enhancer responsible for the hypoxic activation of gene transcription. The purpose of this paper is to understand this hypoxic production of recombinant proteins quantitatively by a mathematical model originally developed based on the following hypotheses; 1 lacZ (the reporter gene) is transcribed after HIF-1 protein complex is bound to the hypoxic enhancer, 2. β-galactosidase synthesis rate is limited at the transcription of lacZ, 3. HIF-1 is an inactive form under a normal oxygen concentration, 4. Oxygen works as a repressor in the synthesis of HIF-1 protein, 5. Both β-galactosidase and HIF-1 are decomposed according to the first order reaction. The effects of hypoxic duration as well as oxygen concentration on the β-galactosidase production were successfully predicated by the model.
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Masuda S, Kada E, Nagao M, Sasaki R. In vitro neuroprotective action of recombinant rat erythropoietin produced by astrocyte cell lines and comparative studies with erythropoietin produced by Chinese hamster ovary cells. Cytotechnology 2012; 31:179-84. [PMID: 19003139 DOI: 10.1023/a:1008028423510] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In the central nervous system, astrocytes produce erythropoietin (Epo) and neurons express its receptor. To examine whether or not the brain Epo protects the in vitro cultured neurons from glutamate-induced cell death, we established rat astrocyte cell lines containing the plasmid for production of recombinant rat Epo. Epo partially purified from the culture medium showed a neuroprotective effect similar to that of rat Epo produced by Chinese hamster ovary (CHO) cells. Comparison was made in some other properties between Epo produced by these astrocyte cell lines and that by CHO cells.
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Moon SK, Takeuchi S, Kambe T, Tsuchiya T, Masuda S, Nagao M, Sasaki R. Erythropoietin enhancer stimulates production of a recombinant protein by Chinese hamster ovary (CHO) cells under hypoxic condition. Cytotechnology 2012; 25:79-88. [PMID: 22358882 DOI: 10.1023/a:1007963800362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Oxygen is a limiting nutrient in animal cell culture and its supply is still worthy of improvement for production of useful proteins with a high efficiency. From a different point of view, development of the system by which a high productivity can be maintained even under hypoxic condition as well as under normoxic condition may be important. A number of hypoxia-inducible genes have been found in eucaryotic cells and the induction in most cases, if not all, is due to hypoxic activation of the gene transcription. Transcription of erythropoietin gene is highly hypoxia-inducible and the induction is achieved by binding of a protein, which is widely distributed in animal cells, to a short DNA stretch (erythropoietin enhancer) in the 3' flanking region of erythropoietin gene. Using a hepatoma cell line (Hep3B) that produces the endogenous erythropoietin in an oxygen-dependent manner and Chinese hamster ovary cells that have been widely used for production of recombinant proteins, we show that, under hypoxic condition, the erythropoietin enhancer can activate not only the promoter of erythropoietin gene but also promoters of cytomegalovirus early genes and eucaryotic polypeptide chain elongation factor gene, both of which are very active in animal cells under normoxic condition.
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Kataoka T, Kiyota N, Shimada T, Imamura Y, Chayahara N, Toyoda M, Funakoshi Y, Tomioka H, Fujiwara Y, Nibu K, Komori T, Nishimura H, Sasaki R, Mukohara T, Minami H. A Pilot Randomized Trial Comparing Standard Pain Control with or without Gabapentin for the Treatment of Pain Related to Radiation-Induced Mucositis in Head and Neck Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32221-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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68
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Ito S, Mine T, Sugawara T, Fujishima Y, Sasaki R, Oyake T, Murai K, Ishida Y. Feasibility of Personalized Therapy with Lenalidomide in Transplantation-Ineligible Myeloma Patients According to the European Myeloma Network Recommendation. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32192-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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69
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Kataoka T, Kiyota N, Shimada T, Toyoda M, Fujiwara Y, Nibu K, Komori T, Sasaki R, Mukohara T, Minami H. A Randomized Phase II Trial Comparing Standard Pain Control with or Without Gabapentin for the Treatment of Pain Related to Radiation-Induced Mucositis in Head and Neck Cancer. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)34127-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Suzuki T, Yano Y, Sakamoto M, Uemura M, Yasuma T, Onishi Y, Sasaki R, Matsumoto K, Hayashi T, Maruyama-Furuta N, Akatsuka H, Gabazza EC, Sumida Y, Takei Y. Correlation of circulating dehydroepiandrosterone with activated protein C generation and carotid intima-media thickness in male patients with type 2 diabetes. Diabet Med 2012; 29:e41-6. [PMID: 22248365 DOI: 10.1111/j.1464-5491.2012.03573.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Dehydroepiandrosterone exerts a protective effect against cardiovascular diseases. However, the relationship of dehydroepiandrosterone with the anticoagulant factor activated protein C, generated by the thrombin-thrombomodulin complex on vascular endothelial cells, remains unknown. This study aimed at studying the relationship between dehydroepiandrosterone and activated protein C generation in patients with Type 2 diabetes. METHODS Sixty-two male patients with Type 2 diabetes were enrolled in this study. Data obtained from 40 healthy male subjects were used as controls. The plasma levels of dehydroepiandrosterone, the activated protein C-protein C inhibitor complex, high-sensitivity C-reactive protein and monocyte chemoattractant protein-1 were measured by enzyme immunoassays. Carotid intima-media thickness was measured by ultrasonography. RESULTS The plasma levels of dehydroepiandrosterone (5.15 ± 2.81 vs. 3.76 ± 2.16 ng/ml; P < 0.005) and the activated protein C-protein C inhibitor complex (1.90 ± 1.07 vs. 1.02 ± 0.51 ng/ml; P < 0.001) were significantly lower in patients with diabetes than in normal subjects. Univariate analysis showed a significant correlation of the plasma level of dehydroepiandrosterone with that of the activated protein C-protein C inhibitor complex (r = 0.48, P < 0.001), high-sensitivity C-reactive protein (r = -0.30, P < 0.05) and with the mean intima-media thickness (r = -0.28, P < 0.05) in patients with diabetes. Stepwise multiple regression analysis showed that the plasma level of dehydroepiandrosterone is significantly correlated with the plasma levels of the activated protein C-protein C inhibitor complex (F = 18.06) and high-sensitivity C-reactive protein (F = 4.94). There was no correlation between the plasma levels of dehydroepiandrosterone and monocyte chemoattractant protein-1. CONCLUSIONS These results suggest that lower circulating levels of dehydroepiandrosterone are associated with decreased activated protein C generation and higher intima-media thickness in patients with Type 2 diabetes.
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Miyawaki D, Nishimura H, Yoshida K, Muraoka O, Nakayama M, Uehara K, Hasegawa S, Nibu K, Sugimura K, Sasaki R. Combined Modality Therapy Including Radiotherapy for Squamous Cell Carcinomas of Maxillary Sinus: A Retrospective Study. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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72
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Hashimoto N, Sasaki R, Nishimura H, Yoshida K, Miyawaki D, Okamoto Y, Ejima Y, Azumi A, Matsui T, Sugimura K. Long-term Outcome and Patterns of Failure in Primary Ocular Adnexal MALT Lymphoma Treated with Radiotherapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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73
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Yoshida K, Nishimura H, Miyawaki D, Muraoka O, Uehara K, Nakayama M, Sasaki R, Sugimura K. Radiation Therapy for Brain Stem Gliomas in Children and Adults. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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74
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Demizu Y, Terashima K, Mima M, Fujii O, Niwa Y, Morimoto K, Sasaki R, Hishikawa Y, Abe M, Murakami M. Treatment Outcomes of Particle Radiotherapy using Protons or Carbon Ions as a Single-modality Therapy for Adenoid Cystic Carcinoma of the Head and Neck. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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75
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Iwata H, Demizu Y, Terashima K, Mima M, Fujii O, Niwa Y, Miyawaki D, Sasaki R, Shibamoto Y, Murakami M. Proton Beam Therapy and Carbon-ion Radiotherapy for T2a-T2bN0M0 Non-small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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