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Takayama K, Kokubo M, Mizowaki T, Nagano K, Narita Y, Yamashita M, Tanabe H, Sakanaka K, Miyabe Y, Hiraoka M. Initial Clinical Experiences of a Newly Developed Image-guided Radiotherapy (IGRT) System “MHI-TM2000”. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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102
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Mizowaki T, Takayama K, Norihisa Y, Yano S, Kamoto T, Nakamura E, Kamba T, Inoue T, Ogawa O, Hiraoka M. High Dose Local Irradiation to T3-4N0M0 Prostate Cancer with Intensity-modulated Radiotherapy Combined with Neoadjuvant Hormonal Therapy. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.811] [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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Kokubo M, Takayama K, Nagano K, Ueki N, Sakanaka K, Yamashita M, Tanabe H, Furukawa H, Mizowaki T, Hiraoka M. 2041 Initial clinical experiences using a newly developed image-guided radiotherapy system. EJC Suppl 2009. [DOI: 10.1016/s1359-6349(09)70557-9] [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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104
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Hosseini SHR, Menezes V, Moosavi-Nejad S, Ohki T, Nakagawa A, Tominaga T, Takayama K. Development of shock wave assisted therapeutic devices and establishment of shock wave therapy. MINIM INVASIV THER 2009; 15:230-40. [PMID: 16966137 DOI: 10.1080/13645700600836315] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In order to exploit systems for shock wave therapy, we are working for the development of clinical devices that are based on the concept of shock waves or related phenomena. The paper describes these new therapeutic devices designed for the minimally invasive approach to vascular thromboloysis, selective dissection of tissues, and drug or DNA delivery. To investigate the response of cells to shock loading, a precise method of shock waves generation in space and time has been developed. This method has been studied for application in cardiovascular therapy, cancer treatment, and cranioplasty in close vicinity of the brain. A laser ablation shock wave assisted particle acceleration device has been developed for delivering drug and DNA into soft targets in the human body. The penetration depth of microparticles observed in the experimental targets is believed to be sufficient for pharmacological treatments. In order to achieve an efficient method for rapid revascularization of cerebral thrombosis, a laser induced liquid jet (LILJ) system has been developed. The LILJ has been successfully applied for selective dissection of soft tissue preserving nerve and blood vessels. The system has been further improved by using piezoelectric actuators to drive the liquid jets, as an alternative to pulse laser.
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Sawada A, Kaneko S, Takayama K, Nagano K, Miyabe Y, Nakamura M, Narita Y, Kokubo M, Takahashi K, Mizowaki T, Hiraoka M. SU-FF-T-285: Daily Verification of Isocenter Alignment for a New Image Guided Radiotherapy System, MHI-TM2000. Med Phys 2009. [DOI: 10.1118/1.3181762] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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106
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Takayama K, Wada T, Nakagawa H, Miyasaka T, Miyouchin K, Sakamoto M, Taoka T, Kichikawa K, Kurokawa S. 012 Symptomatic chronic total internal carotid artery occlusion treated successfully with stenting and angioplasty: a case report. J Neurointerv Surg 2009. [DOI: 10.1136/jnis.2009.000869l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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107
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Yamamoto T, Takayama K, Igawa K, Yamanaka M, Ueno M, Yokozeki H. Eruptive sebaceous hyperplasia in association with chronic renal failure. Clin Exp Dermatol 2009; 34:e244-5. [PMID: 19508575 DOI: 10.1111/j.1365-2230.2008.03114.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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108
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Ebi N, Semba H, Tokunaga S, Takayama K, Wataya H, Kuraki T, Yamamoto H, Akamine S, Okamoto I, Nakanishi Y. Safety and efficacy of gefitinib monotherapy for patients (pts) ≥80 years (yrs) with advanced non-small cell lung cancer (NSCLC): A phase II subset analysis. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e19059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e19059 Background: Lung cancer is a disease of the elderly with median age at diagnosis of 70 yrs. The very elderly pts (age ≥80 yrs) with advanced NSCLC have not been well studied, even though this proportion is increasing over coming years. There are no data to evaluate the safety and efficacy of gefitinib treatment for pts ≥80 yrs with advanced NSCLC. Methods: We reported the phase II trial of gefitinib monotherapy in chemotherapy-naïve pts of 75 yrs or older with advanced NSCLC (J Thorac Oncol. 2008;3: 1166–1171). We analyzed data for pts ≥80 yrs, comparing with those <80 yrs in our trial. Results: A total of 28 pts were 80 yrs old and over in our trial. Patient characteristics: male/female = 12/16, median age = 82 (range 80–90), ECOG PS 0/1/2=7/13/8, stage IB/IIIA/IV=1/3/24, and adenocarcinoma (Ad)/non-Ad= 22/6. Five pts achieved partial response. The response rate was 18% (CI 95%, 6–39). The disease control rate was 50%. Median survival time was 9 months and 1-year survival rate was 39%. The most frequent adverse events were skin disorders (86%). Nine pts (32%) experienced toxicities ≥grade 3. There were two pts with possible interstitial lung disease including one treatment-related death. Tumor samples from 10 pts were analyzed for EGFR mutation status. EGFR mutations were detected in tumor tissues from 5 pts, of which 3 had partial responses (60%). Table shows the difference between the pts ≥80 yrs and those <80 yrs. Conclusions: Gefitinib monotherapy is effective and relatively well tolerated for pts ≥80 yrs with advanced NSCLC. Gefitinib has potential as a first-line therapeutic option even if elderly pts are more than 80 yrs old. [Table: see text] No significant financial relationships to disclose.
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Nishizawa A, Satoh T, Watanabe R, Takayama K, Nakano H, Sawamura D, Yokozeki H. Cowden syndrome: a novel mutation and overlooked glycogenic acanthosis in gingiva. Br J Dermatol 2009; 160:1116-8. [DOI: 10.1111/j.1365-2133.2009.09072.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Yanagawa F, Onuki Y, Morishita M, Takayama K. Prediction of permeability of FD-4 through porous poly (2-hydroxyethyl methacrylate) membrane by multiple linear regression and artificial neural network. DIE PHARMAZIE 2009; 64:311-315. [PMID: 19530441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The aim of this study was to predict the permeability through porous poly (2-hydroxyethyl methacrylate) (pHEMA) membranes of fluorescein isothiocyanate-labeled dextran molecular weight 4400 (FD-4) as a model of peptide and protein drug movement. Homogeneous standard membranes were prepared by redox polymerization. Permeability data were predicted by an artificial neural network (ANN) as a function of polymerization factors, and the accuracy was compared with that of conventional multiple linear regression (MLR). Good linearity was observed with each model, with the correlation coefficient of a leave-one-out cross-validation (Rcross) being 0.857 for the MLR model and 0.876 for the ANN model. The mean bias and mean accuracy for the ANN were somewhat smaller than those of the MLR. The ANN method provides an accurate quantitative approximation of the permeability coefficient of FD-4, as judged by conventional MLR, and could be applied to prediction of the non-linear relation between polymerization factors and the permeability of FD-4.
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Xue Y, Tang M, Hieda Y, Fujihara J, Takayama K, Takatsuka H, Takeshita H. High-Performance Liquid Chromatographic Determination of Chlorhexidine in Whole Blood by Solid-Phase Extraction and Kinetics Following an Intravenous Infusion in Rats. J Anal Toxicol 2009; 33:85-91. [DOI: 10.1093/jat/33.2.85] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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112
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Zhang H, Takayama K, Zhang L, Uchino J, Harada A, Harada T, Hisasue J, Nakagaki N, Zhou C, Nakanishi Y. Tetracycline-inducible promoter-based conditionally replicative adenoviruses for the control of viral replication. Cancer Gene Ther 2009; 16:415-22. [DOI: 10.1038/cgt.2008.101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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113
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Nishizawa A, Nakano H, Satoh T, Takayama K, Sawamura D, Yokozeki H. Haber's syndrome may be a clinical entity different from Dowling-Degos disease. Br J Dermatol 2008; 160:215-7. [PMID: 19067693 DOI: 10.1111/j.1365-2133.2008.08938.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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114
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Hirano T, Nakagawa A, Ohki T, Uenohara H, Takayama K, Tominaga T. A laser-induced liquid jet catheter system: a novel endovascular device for rapid and reliable fibrinolysis in acute cerebral embolism. MINIMALLY INVASIVE NEUROSURGERY : MIN 2008; 51:324-328. [PMID: 19061141 DOI: 10.1055/s-0028-1085429] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
OBJECTIVE Mechanical removal of intravascular clots in addition to administration of tissue plasminogen activator are both desirable for improved outcome in acute embolic stroke. We have developed a novel endovascular catheter system for rapid and reliable mechanical recanalization of cerebral embolisms with little or no requirement for fibrinolytic agents. Here, we describe the evaluation of this device in vitro. MATERIALS Pulsed liquid jets were generated and ejected from the catheter exit by accelerating cold physiological saline (4 degrees C, 40 mL/h) using the energy of a pulsed holmium:yttrium-aluminum-garnet (YAG) laser (3 Hz, 1.2 W). Accessibility beyond the tortuous cavernous portion of the internal carotid artery to the M1 and A1 regions was confirmed using a transparent model of the human cerebral artery. Mechanical characteristics of the liquid jets were evaluated with a high-speed camera. Liquid jets of physiological saline or urokinase solution (1,200 IU/mL) were exposed to artificial thrombi made of human blood under temperature monitoring. Remnants of thrombi were collected and incubated at 37 degrees C for 10 min for estimation of fibrinolysis rates. RESULTS The jet velocity (maximum: 5 m/s) was controlled by changing the laser energy. The fibrinolysis rates (mean+/-SD) after exposure to jets of saline or urokinase solution for 45 s were 62.2+/-16.4 and 94.0+/-3.4%, respectively, and were significantly better than the rate of 8.1+/-2.0% with administration of urokinase alone. The local temperature rise was less than 8 degrees C. CONCLUSIONS The results show that the laser-induced liquid jet catheter system may be a powerful tool for mechanical destruction of emboli and augmentation of the effect of fibrinolytic agents beyond the tortuous part of the internal carotid artery.
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Ishii K, Saito Y, Itai S, Nemoto M, Takayama K, Nagai T. Comparative Study of Pharmacokinetic Parameters Between Clarithromycin and Erythromycin Stearate in Relation to Their Physicochemical Properties. Drug Dev Ind Pharm 2008; 24:129-37. [PMID: 15605442 DOI: 10.3109/03639049809085597] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Pharmacokinetic parameters for clarithromycin (CAM) and erythromycin stearate (EMS) were obtained from a model including decomposition in the gastrointestinal tract. To confirm the accuracy of the parameters, various physicochemical properties of both drugs were examined. The ratio of the in vivo dissolution rate, the in vivo decomposition rate and the absorption rate between CAM and EMS were well correlated to the ratio of the in vitro intrinsic dissolution rate, the decomposition rate in the acidic solution, and partition coefficient, respectively. One of the reasons for the excellent absorption of CAM compared with that of EMS was the higher stability in the acidic solution and the higher partition coefficient of CAM. These findings indicate that the ratio of the partition coefficient to the decomposition rate constant in acidic solution plays an important role in determining drug bioavailability for macrolide antibiotics.
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Yoshioka S, Ishihara Y, Terazono T, Tsunakawa N, Murai M, Yasuda T, Kitamura, Kunihiro Y, Sakai K, Hirose Y, Tonooka K, Takayama K, Imai F, Godo M, Matsuo M, Nakamura K, Aso Y, Kojima S, Takeda Y, Terao T. Quinine Actinometry as a Method for Calibrating Ultraviolet Radiation Intensity in Light-Stability Testing of Pharmaceuticals. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049409050221] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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117
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Shirakura O, Yamada M, Hashimoto M, Ishimaru S, Takayama K, Nagai T. Particle Size Design Using Computer Optimization Technique. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049109044257] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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118
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Miyamoto Y, Ogawa S, Miyajima M, Stoa H, Takayama K, Nagai T. An Evaluation of Process Variables in wet Granulation. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049509065902] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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119
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Shirakura O, Yamada M, Hashimoto M, Ishimaru S, Takayama K, Nagai T. Effect of Amount and Composition of Granulating Solution on Physical Characteristics of Tablets. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049209069317] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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120
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Sakamoto M, Mizowaki T, Mitsumori M, Takayama K, Sasai K, Negoro Y, Norihisa Y, Kamoto T, Ogawa O, Hiraoka M. Is Adjuvant Hormonal Therapy Necessary to Japanese Patients with Locally Advanced Prostate Cancer Treated by 3D-CRT? Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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121
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Takayama K, Nagano K, Kaneko S, Nakayama H, Kawada N, Takahashi K, Narita Y, Mizowaki T, Kokubo M, Hiraoka M. Imaging Dose on a Dual On-board kV X-ray Imaging System in MHI-TM2000. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.339] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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122
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Nishizawa A, Nakajima R, Nakano H, Sawamura D, Takayama K, Satoh T, Yokozeki H. A de novo missense mutation in the keratin 13 gene in oral white sponge naevus. Br J Dermatol 2008; 159:974-5. [PMID: 18616775 DOI: 10.1111/j.1365-2133.2008.08716.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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123
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Takayama K, Kim Y, Ichiki M, Kim S, Inoue K, Yang S, Kawasaki M, Jung M, Tokunaga S, Kim K, Nakanishi Y. Randomized, phase II study of biweekly versus weekly paclitaxel/carboplatin (PC) for the treatment of advanced non-small cell lung cancer: A Japan-Korea collaborative clinical trial. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.19124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Taoka T, Sakamoto M, Nakagawa H, Nakase H, Iwasaki S, Takayama K, Taoka K, Hoshida T, Sakaki T, Kichikawa K. Diffusion tensor tractography of the Meyer loop in cases of temporal lobe resection for temporal lobe epilepsy: correlation between postsurgical visual field defect and anterior limit of Meyer loop on tractography. AJNR Am J Neuroradiol 2008; 29:1329-34. [PMID: 18451088 DOI: 10.3174/ajnr.a1101] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Visual field defects sometimes occur after temporal resection surgery. Our purpose was to evaluate the correlation between visual field defects caused by temporal lobe resection and the degree of resection of the Meyer loop, as assessed by diffusion tensor tractography. MATERIALS AND METHODS We examined 14 patients who underwent temporal resection for temporal lobe epilepsy. We obtained presurgical tractographies and then measured the distance between the temporal tip and the anterior limit of the Meyer loop (T-M distance). The degree of resection of the Meyer loop was defined as the distance from the anterior limit of the Meyer loop to the posterior limit of the temporal lobe resection (M-R distance). This was calculated by subtracting the T-M distance from the measured distance between the temporal tip and the posterior limit of the resection (T-R distance). RESULTS The mean T-M distance was 36.6 mm. The interindividual variation of the distance ranged from 30.0 to 43.2 mm. Although there was no statistically significant correlation between the extent of the visual field defect and the T-R distance, there was a statistically significant correlation between the degree of the visual field defect and the M-R distance. CONCLUSION The range of interindividual variation for the position of the Meyer loop was rather large, indicating that this variation is the key factor in visual field defects after temporal lobectomy, and the visual field defect appears to be predicted by presurgical tractography. Evaluation of the Meyer loop through the use of tractography seems to be a feasible method, which can be used to predict the visual field defect after temporal lobe resection.
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Ayabe M, Ishii K, Takayama K, Aoki J, Tanaka H. Comparison of interdevice measurement difference of pedometers in younger and older adults. Br J Sports Med 2008; 44:95-9. [DOI: 10.1136/bjsm.2007.045179] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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