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Abstract
A clear correlation between electronic structure and CO2 selectivity for steam reforming of methanol (SRM) was obtained with PdZn, PtZn, NiZn, and PdCd intermetallics on the basis of experiments and calculations. In order to rule out the effects of oxide supports, the intermetallic powders were simply prepared by alloying in an arc furnace followed by crushing in a mortar. PdZn and PdCd exhibit valence electronic densities of states similar to that of Cu and significant chemical shifts (larger than 1 eV) of Pd 3d states with respect to pure Pd, as verified by high-resolution hard X-ray photoelectron spectroscopy (HXPS) measurements and density functional theory (DFT) calculations. Consequently, they show the similar high selectivity of CO2 for the SRM reaction. However, this is not the case for PtZn and NiZn because of the slight differences in their valence electronic structures from that of PdZn. The interval between the Fermi level and the top of the d band is closely related to the selectivity of CO2 for the SRM: the larger the interval is, the higher is the selectivity of CO2. According to DFT calculations for bulk PdZn performed by Chen et al. ( Phys. Rev. B 2003 , 68 , 075417 ), the (111) and (100) surfaces exposing Zn and Pd in an equimolar ratio are more stable than the (001) or (110) surfaces terminated by alternative Zn or Pd layers. First-principles slab calculations for PdZn, PtZn, and NiZn show that bond breaking on the surface leads to a reduction in the d bandwidth but that the d band for stable (111) or (100) surfaces remains essentially unchanged from that of the bulk. It is intriguing that PdZn and PdCd do not contain Cu but show similar valence electronic structure and catalytic selectivity, and hence, a concept is proposed where PdZn and PdCd are regarded as pseudoelements of Cu. The basis of this concept is like electronic structure, like catalysis, which has been demonstrated by experiments and calculations. This is a logical way to enable us to look for new catalysts in which precious metals are partially or completely replaced by base metals. We do not expect that this concept can be applied to all catalytic reactions, but this approach is one of most promising ways to derive a better understanding of the origin of catalytic mechanisms and eventually allow us to design useful catalysts intentionally in the future. This Account reviews the authors' published works on this topic.
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Affiliation(s)
- A. P. Tsai
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
- National Institute for Materials Science, Tsukuba 305-0047, Japan
| | - S. Kameoka
- Institute
of Multidisciplinary Research for Advanced Materials, Tohoku University, Sendai 980-8577, Japan
| | - K. Nozawa
- Department
of Physics and Astronomy, Kagoshima University, Kagoshima 890-0065, Japan
| | - M. Shimoda
- National Institute for Materials Science, Tsukuba 305-0047, Japan
| | - Y. Ishii
- Department
of Physics, Chuo University, Tokyo 112-8551, Japan
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Hasegawa H, Okabayashi K, Tsuruta M, Koike J, Funahashi K, Yokomizo H, Yoshimatsu K, Kan H, Yamada T, Ishida H, Ishibashi K, Saida Y, Enomoto T, Katsumata K, Koda K, Ochiai T, Sakamoto K, Ogawa S, Itabashi M, Kameoka S. Updated survival results of FACT trial: Multicenter phase II trial of neoadjuvant chemotherapy with mFOLFOX6 for stage II/III rectal cancer with a T3/T4 tumor. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.033] [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: 11/14/2022] Open
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Yoshida M, Ishiguro M, Ikejiri K, Mochizuki I, Nakamoto Y, Kinugasa Y, Takagane A, Endo T, Shinozaki H, Takii Y, Mochizuki H, Kotake K, Kameoka S, Takahashi K, Watanabe T, Watanabe M, Boku N, Tomita N, Nakatani E, Sugihara K. S-1 as adjuvant chemotherapy for stage III colon cancer: a randomized phase III study (ACTS-CC trial). Ann Oncol 2014; 25:1743-1749. [PMID: 24942277 PMCID: PMC4143094 DOI: 10.1093/annonc/mdu232] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2014] [Revised: 06/09/2014] [Accepted: 06/11/2014] [Indexed: 12/27/2022] Open
Abstract
BACKGROUND S-1 is an oral fluoropyrimidine whose antitumor effects have been demonstrated in treating various gastrointestinal cancers, including metastatic colon cancer, when administered as monotherapy or in combination chemotherapy. We conducted a randomized phase III study investigating the efficacy of S-1 as adjuvant chemotherapy for colon cancer by evaluating its noninferiority to tegafur-uracil plus leucovorin (UFT/LV). PATIENTS AND METHODS Patients aged 20-80 years with curatively resected stage III colon cancer were randomly assigned to receive S-1 (80-120 mg/day on days 1-28 every 42 days; four courses) or UFT/LV (UFT: 300-600 mg/day and LV: 75 mg/day on days 1-28 every 35 days; five courses). The primary end point was disease-free survival (DFS) at 3 years. RESULTS A total of 1518 patients (758 and 760 in the S-1 and UFT/LV group, respectively) were included in the full analysis set. The 3-year DFS rate was 75.5% and 72.5% in the S-1 and UFT/LV group, respectively. The stratified hazard ratio for DFS in the S-1 group compared with the UFT/LV group was 0.85 (95% confidence interval: 0.70-1.03), demonstrating the noninferiority of S-1 (noninferiority stratified log-rank test, P < 0.001). In the subgroup analysis, no significant interactions were identified between the major baseline characteristics and the treatment groups. CONCLUSION Adjuvant chemotherapy using S-1 for stage III colon cancer was confirmed to be noninferior in DFS compared with UFT/LV. S-1 could be a new treatment option as adjuvant chemotherapy for colon cancer. CLINICALTRIALSGOV NCT00660894.
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Affiliation(s)
- M Yoshida
- Cancer Chemotherapy Center, Osaka Medical College Hospital, Osaka
| | - M Ishiguro
- Department of Translational Oncology, Tokyo Medical and Dental University, Graduate School, Tokyo
| | - K Ikejiri
- Department of Surgery, Center of Gastroenterology, National Hospital Organization Kyushu Medical Center, Fukuoka
| | - I Mochizuki
- Department of Gastroenterological Surgery, Iwate Prefectural Central Hospital, Iwate
| | - Y Nakamoto
- Department of Surgery, Kobe City Medical Center West Hospital, Hyogo
| | - Y Kinugasa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, Shizuoka
| | - A Takagane
- Department of Surgery, Hakodate Goryoukaku Hospital, Hokkaido
| | - T Endo
- Department of Colorectal Surgery, Japanese Red Cross Medical Center, Tokyo
| | - H Shinozaki
- Department of Surgery, Saiseikai Utsunomiya Hospital, Tochigi
| | - Y Takii
- Department of Surgery, Niigata Cancer Center Hospital, Niigata
| | - H Mochizuki
- Department of Surgery, National Defense Medical College, Saitama
| | - K Kotake
- Department of Surgery, Tochigi Cancer Center, Tochigi
| | - S Kameoka
- Department of Surgery II, Tokyo Women's Medical University, Tokyo
| | - K Takahashi
- Department of Surgery, Tokyo Metropolitan Cancer and Infectious Diseases Center Komagome Hospital, Tokyo
| | - T Watanabe
- Department of Surgical Oncology and Vascular Surgery, The University of Tokyo, Graduate School of Medicine, Tokyo
| | - M Watanabe
- Department of Surgery, Kitasato University School of Medicine, Kanagawa
| | - N Boku
- Department of Clinical Oncology, St Marianna University, Kanagawa
| | - N Tomita
- Department of Surgery, Hyogo College of Medicine, Hyogo
| | - E Nakatani
- Department of Statistical Analysis, Translational Research Informatics Center, Hyogo
| | - K Sugihara
- Department of Surgical Oncology, Tokyo Medical and Dental University, Graduate School, Tokyo, Japan.
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Yokomizo H, Yoshimatsu K, Koike J, Funahashi K, Kan H, Yamada T, Ishida H, Ishibashi K, Saida Y, Enomoto T, Katsumata K, Hasegawa H, Koda K, Ochiai T, Sakamoto K, Nakayama M, Naritaka Y, Ogawa S, Itabashi M, Kameoka S. Multicenter Phase Ii Trial of Neoadjuvant Chemotherapy with Mfolfox6 for Stage Ii/Iii Rectal Cancer with a T3/T4 Tumor Fact Trial. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu333.91] [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: 11/13/2022] Open
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5
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Matsumoto K, Sato T, Iwanari S, Kameoka S, Oki H, Komiyama K, Honda K. The use of arthrography in the diagnosis of temporomandibular joint synovial chondromatosis. Dentomaxillofac Radiol 2012. [DOI: 10.1259/dmfr.20110010] [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: 11/05/2022] Open
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Mochizuki I, Takiuchi H, Ikejiri K, Nakamoto Y, Kinugasa Y, Takagane A, Endo T, Shinozaki H, Takii Y, Takahashi Y, Mochizuki H, Kotake K, Kameoka S, Takahashi K, Watanabe T, Watanabe M, Boku N, Tomita N, Matsubara Y, Sugihara K. Safety of UFT/LV and S-1 as adjuvant therapy for stage III colon cancer in phase III trial: ACTS-CC trial. Br J Cancer 2012; 106:1268-73. [PMID: 22415232 PMCID: PMC3314794 DOI: 10.1038/bjc.2012.86] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2011] [Revised: 02/14/2012] [Accepted: 02/20/2012] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND The Adjuvant Chemotherapy Trial of TS-1 for Colon Cancer (ACTS-CC) is a phase III trial designed to validate the non-inferiority of S-1 to UFT/leucovorin (LV) as postoperative adjuvant chemotherapy for stage III colon cancer. We report the results of a planned safety analysis. METHODS Patients aged 20-80 years with curatively resected stage III colon cancer were randomly assigned to receive UFT/LV (UFT, 300 mg m(-2) per day as tegafur; LV, 75 mg per day on days 1-28, every 35 days, 5 courses) or S-1 (80, 100, or 120 mg per day on days 1-28, every 42 days, 4 courses). Treatment status and safety were evaluated. RESULTS Of 1535 enrolled patients, a total of 1504 (756 allocated to S-1 and 748 to UFT/LV) were analysed. The completion rate of protocol treatment was 77% in the S-1 group and 73% in the UFT/LV group. The overall incidence of adverse events (AEs) were 80% in S-1 and 74% in UFT/LV. Stomatitis, anorexia, hyperpigmentation, and haematological toxicities were common in S-1, whereas increased alanine aminotransferase and aspartate aminotransferase were common in UFT/LV. The incidences of grade 3 AEs were 16% and 14%, respectively. CONCLUSION Although AE profiles differed between the groups, feasibility of the protocol treatment was good. Both S-1 and UFT/LV could be safely used as adjuvant chemotherapy.
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Affiliation(s)
- I Mochizuki
- Department of Gastroenterological Surgery, Iwate Central Prefectural Hospital, 1-4-1 Ueda, Morioka, Iwate 020-0066, Japan
| | - H Takiuchi
- Cancer Chemotherapy Center, Osaka Medical College, 2-7 Daigaku-machi, Takatsuki, Osaka 569-8686, Japan
| | - K Ikejiri
- Department of Surgery, Gastrointestinal Center, National Hospital Organization Kyushu Medical Center, 1-8-1 Jigyohama, Chuo-ku, Fukuoka 810-8563, Japan
| | - Y Nakamoto
- Department of Surgery, Kobe City Medical Center West Hospital, 1-2-4 Nagata-ku, Kobe, Hyogo 653-0013, Japan
| | - Y Kinugasa
- Division of Colon and Rectal Surgery, Shizuoka Cancer Center Hospital, 1007 Shimonagakubo, Nagaizumi-cho, Sunto-gun, Shizuoka 411-8777, Japan
| | - A Takagane
- Department of Surgery, Hakodate Goryoukaku Hospital, 38-3 Goryoukaku-cho, Hakodate, Hokkaido 040-8611, Japan
| | - T Endo
- Department of Coloproctological Surgery, Japanese Red Cross Medical Center, 4-1-22 Hiroo, Shibuya-ku, Tokyo 150-8935, Japan
| | - H Shinozaki
- Department of Surgery, Saiseikai Utsunomiya Hospital, 911-1 Takebayashi, Utsunomiya, Tochigi 321-0974, Japan
| | - Y Takii
- Department of Surgery, Niigata Cancer Center Hospital, 2-15-3, Kawagishi-cho, Chuo-ku, Niigata, Niigata 951-8566, Japan
| | - Y Takahashi
- Department of Surgery, Ogaki Municipal Hospital, 4-86 Minaminokawa-cho, Ogaki, Gifu 503-8502, Japan
| | - H Mochizuki
- Department of Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan
| | - K Kotake
- Department of Surgery, Tochigi Cancer Center, 4-9-13 Yonan, Utsunomiya, Tochigi 320-0834, Japan
| | - S Kameoka
- Department of Surgery II, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjyuku-ku, Tokyo 162-8666, Japan
| | - K Takahashi
- Department of Surgery, Cancer and Infectious Diseases Center Komagome Hospital, 18-22, Honkomagome 3-chome, Bunkyo-ku, Tokyo 113-8677, Japan
| | - T Watanabe
- Department of Surgery, Teikyo University, 2-11-1 Kaga, Itabashi-ku, Tokyo 173-8605, Japan
| | - M Watanabe
- Department of Surgery, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa 252-0375, Japan
| | - N Boku
- Department of Clinical Oncology, St Marianna University School of Medicine, 2-16-1 Sugao, Miyamae-ku, Kawasaki, Kanagawa 216-8511, Japan
| | - N Tomita
- Department of Surgery, Hyogo College of Medicine, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Y Matsubara
- Department of Data Management and Analysis, Translational Research Informatics Center, 1-5-4 Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - K Sugihara
- Department of Surgical Oncology, Tokyo Medical and Dental University, Graduate School, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
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Matsumoto K, Sato T, Iwanari S, Kameoka S, Oki H, Komiyama K, Honda K. The use of arthrography in the diagnosis of temporomandibular joint synovial chondromatosis. Dentomaxillofac Radiol 2012; 42:15388284. [PMID: 22282505 DOI: 10.1259/dmfr/15388284] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Synovial chondromatosis (SC) involving the temporomandibular joint (TMJ) is very rare and can occur in either or both cavities. Differentiation of the affected cavity in SC is therefore as important as making the diagnosis. This report presents a case of SC in which both cavities were thought to be affected, but arthrography using cone beam CT (CBCT) allowed us to see that involvement was limited to the superior joint cavity. In addition, we describe the usefulness of arthrographic CBCT for diagnosis and treatment planning in SC of the TMJ.
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Affiliation(s)
- K Matsumoto
- Department of Oral and Maxillofacial Radiology, School of Dentistry, Nihon University, Tokyo, Japan.
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8
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Cohen JD, Babiarz JE, Abrams RM, Guo L, Kameoka S, Chiao E, Taunton J, Kolaja KL. Use of human stem cell derived cardiomyocytes to examine sunitinib mediated cardiotoxicity and electrophysiological alterations. Toxicol Appl Pharmacol 2011; 257:74-83. [PMID: 21906609 DOI: 10.1016/j.taap.2011.08.020] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2011] [Revised: 08/19/2011] [Accepted: 08/22/2011] [Indexed: 01/01/2023]
Abstract
Sunitinib, an oral tyrosine kinase inhibitor approved to treat advanced renal cell carcinoma and gastrointestinal stroma tumor, is associated with clinical cardiac toxicity. Although the precise mechanism of sunitinib cardiotoxicity is not known, both the key metabolic energy regulator, AMP-activated protein kinase (AMPK), and ribosomal S 6 kinase (RSK) have been hypothesized as causative, albeit based on rodent models. To study the mechanism of sunitinib-mediated cardiotoxicity in a human model, induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) having electrophysiological and contractile properties of native cardiac tissue were investigated. Sunitinib was cardiotoxic in a dose-dependent manner with an IC₅₀ in the low micromolar range, observed by a loss of cellular ATP, an increase in oxidized glutathione, and induction of apoptosis in iPSC-CMs. Pretreatment of iPSC-CMs with AMPK activators AICAR or metformin, increased the phosphorylation of pAMPK-T172 and pACC-S79, but only marginally attenuated sunitinib mediated cell death. Furthermore, additional inhibitors of AMPK were not directly cytotoxic to iPSC-CMs up to 250 μM concentrations. Inhibition of RSK with a highly specific, irreversible, small molecule inhibitor (RSK-FMK-MEA) did not induce cytotoxicity in iPSC-CMs below 250 μM. Extensive electrophysiological analysis of sunitinib and RSK-FMK-MEA mediated conduction effects were performed. Taken together, these findings suggest that inhibition of AMPK and RSK are not a major component of sunitinib-induced cardiotoxicity. Although the exact mechanism of cardiotoxicity of sunitinib is not known, it is likely due to inhibition of multiple kinases simultaneously. These data highlight the utility of human iPSC-CMs in investigating the potential molecular mechanisms underlying drug-induced cardiotoxicity.
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Affiliation(s)
- J D Cohen
- Early and Investigative Safety, Nonclinical Safety, Hoffmann-La Roche, 340 Kingsland Street, Nutley, NJ 07110, USA
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Murao R, Sugiyama K, Kameoka S, Tsai AP. Structural analysis of metal nano-particles prepared by leaching. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311089379] [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: 11/10/2022] Open
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10
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Egashira Y, Nishio T, Matsuura T, Kameoka S, Uesaka M. SU-E-T-721: Spatial Re-Sampling of Pencil Beams to Improve the Dose-Calculation Accuracy in Proton Therapy. Med Phys 2011. [DOI: 10.1118/1.3612683] [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: 11/07/2022] Open
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Takagane A, Takiuchi H, Ikejiri K, Mochizuki I, Mochizuki H, Kotake K, Kameoka S, Takahashi K, Watanabe T, Watanabe M, Boku N, Tomita N, Matsubara Y, Sugihara K. Initial safety report of ACTS-CC trial (TRICC0706): A randomized phase III trial of UFT/LV versus S-1 as adjuvant therapy for stage III colon cancer. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.3561] [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: 11/20/2022] Open
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Kameoka S, Matsumoto K, Kai Y, Yonehara Y, Arai Y, Honda K. Establishment of temporomandibular joint puncture technique in rats using in vivo micro-computed tomography (R_mCT®). Dentomaxillofac Radiol 2010; 39:441-5. [PMID: 20841463 DOI: 10.1259/dmfr/37174063] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The aim of the report was to establish puncture techniques for the temporomandibular joint (TMJ) cavity in rats. The experimental sample comprised 30 male Sprague-Dawley rats. Under general anaesthesia the superior joint cavity of the rat was punctured either laterally (lateral puncture technique (LPT), n = 11), anteriorly (anterosuperior puncture technique (ASPT), n = 13) or anteroinferior puncture technique (AIPT), n = 6) using a 27-gauge needle. After the tip of the needle was confirmed by micro-CT (R-mCT®, Rigaku, Tokyo, Japan) located on the mandibular fossa, 0.05 ml of contrast media was injected under micro-CT fluoroscopic guidance. After confirmation that the joint cavity was filled with contrast media, micro-CT imaging was carried out. The puncture for LPT was accurate in 5 of the 11 animals. The ASPT was accurate in all 13 animals. The AIPT punctured 3 of the 6 animals. Furthermore, the ASPT and AIPT demonstrated improved preservation of the needle; it was harder to detach the needle, which led to greater stability. These results suggest that ASPT assisted by R-mCT® is useful for basic research, including drug discovery and pathogenesis of TMJ diseases.
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Affiliation(s)
- S Kameoka
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13 Kanda-Surugadai, Chiyoda-ku, Tokyo, 101-8310. Japan
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Matsuura T, Egashira Y, Nishio T, Kohno R, Kameoka S, Ohta R, Matsumura K, Suzuki H, Taniyama T, Toda T, Shimoju T, Sakamoto A, Yamazaki K, Kawashima M, Ogino T, Matsumoto Y, Wada M, Furusawa Y. WE-A-BRA-05: Proton Ultra High Dose-Rate Effect on HSG Cell Survival Curve. Med Phys 2010. [DOI: 10.1118/1.3469326] [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: 11/07/2022] Open
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Matsuura T, Hotta K, Kohno R, Nishio T, Kameoka S, Fukuhara S, Sasaki K, Ohta R, Matsumura K, Shimoju T, Toda T, Ogino T. SU-GG-T-455: Experimental Evaluation of Irradiated Dose in Clinical Practice for Proton Therapy. Med Phys 2010. [DOI: 10.1118/1.3468853] [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: 11/07/2022] Open
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15
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Egashira Y, Nishio T, Kameoka S, Matsuura T, Uesaka M. SU-GG-T-590: Delta-Functional Multi Segmented Pencil Beam Algorithm for Highly Accurate Proton Dose Calculation in Heterogeneous Body. Med Phys 2010. [DOI: 10.1118/1.3468991] [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: 11/07/2022] Open
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16
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Kohno R, Hotta K, Matsubara K, Matsuura T, Kameoka S, Nisiho T, Kawashima M, Ogino T. SU-GG-T-452: In-Vivo Dosimetry Using a MOSFET Detector in an Anthropomorphic Phantom for Therapeutic Proton Beam. Med Phys 2010. [DOI: 10.1118/1.3468850] [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: 11/07/2022] Open
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Bhang H, Ajimura S, Aoki K, Banu A, Fukuda T, Hashimoto O, Hwang J, Kameoka S, Kang B, Kim E, Kim J, Maruta T, Miura Y, Miyake Y, Nagae T, Nakamura M, Nakamura S, Noumi H, Okada S, Okayasu Y, Outa H, Park H, Saha P, Sato Y, Sekimoto M, Takahashi T, Tamura H, Tanida K, Toyoda A, Tshoo K, Tsukada K, Watanabe T, Yim H. The Contribution of the Three-Body Process in the Nonmesonic Weak Decay of the Λ12CHypernucleus. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100305013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Kameoka S, Kuroki Y, Honda K, Kijima N, Matsumoto K, Asano M, Arai Y, Shirakawa T. Diagnostic accuracy of microcomputed tomography for osseous abnormalities in the rat temporomandibular joint condyle. Dentomaxillofac Radiol 2010; 38:465-9. [PMID: 19767517 DOI: 10.1259/dmfr/24350438] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES Our aim was to investigate the diagnostic accuracy of in vivo micro-CT for osseous abnormalities of the rat temporomandibular joint (TMJ) condyle, using macroscopic observations as the "gold standard". METHODS A 30 TMJ arthritis model was prepared by injecting inflammatory complete Freund's adjuvant (CFA) into one side of the TMJ cavities of rats. The TMJ condyles were then imaged using micro-CT. The samples were macroscopically evaluated for osseous abnormalities, including erosions, osteophytes, flattening and concavity. The micro-CT images were independently assessed for abnormalities using the same criteria. Images in three planes were produced using the micro-XYZ technique with the micro-CT equipment. RESULTS According to the macroscopic observations, 26 of the 60 rat condyles showed osseous abnormalities. The micro-XYZ images detected abnormalities in 25 of the condyles. The condyle diagnostic accuracy of micro-CT was 0.98, the sensitivity was 0.96 and the specificity was 1.0. CONCLUSIONS Good diagnostic results were obtained using micro-CT. It is therefore an effective technique for the evaluation of osseous abnormalities in the rat TMJ condyle.
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Affiliation(s)
- S Kameoka
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, Tokyo, Japan
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Kim M, Ajimura S, Aoki K, Banu A, Bhang H, Fukuda T, Hashimoto O, Hwang JI, Kameoka S, Kang BH, Kim E, Kim JH, Maruta T, Miura Y, Miyake Y, Nagae T, Nakamura M, Nakamura SN, Noumi H, Okada S, Okayasu Y, Outa H, Park H, Saha PK, Sato Y, Sekimoto M, Takahashi T, Tamura H, Tanida K, Toyoda A, Tshoo K, Tsukada K, Watanabe T, Yim HJ. Three-body nonmesonic weak decay of the (Lambda)12C hypernucleus. Phys Rev Lett 2009; 103:182502. [PMID: 19905801 DOI: 10.1103/physrevlett.103.182502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2009] [Indexed: 05/28/2023]
Abstract
We have measured the branching ratio of the three-body process in the nonmesonic weak decay of Lambda12C to be 0.29+/-0.13. This result was obtained by reproducing the nucleon and the nucleon pair yields introducing a measured final state interaction. At the same time, we have determined the absolute decay widths, Gamma(n) and Gamma(p), along with Gamma2N, whose relative ratio has been a long-standing puzzle. Including the three-body process, we have successfully reproduced the nucleon energy distribution, the coincidence two-nucleon angular correlation, and the momentum sum distribution simultaneously.
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Affiliation(s)
- M Kim
- Department of Physics and Astronomy, Seoul National University, Seoul, 151-747, Korea
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Fukuhara S, Nihei K, Kameoka S, Kohno R, Nishio T, Ariji T, Onozawa M, Ogino T. Effect of Prostate Motion and Bony Structures on Dose Distribution of Proton Beam Therapy for Prostate Cancer. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.151] [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: 10/21/2022]
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21
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Koszul R, Kim KP, Prentiss M, Kleckner N, Kameoka S. Meiotic chromosomes move by linkage to dynamic actin cables with transduction of force through the nuclear envelope. Cell 2008; 133:1188-201. [PMID: 18585353 DOI: 10.1016/j.cell.2008.04.050] [Citation(s) in RCA: 161] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2007] [Revised: 02/08/2008] [Accepted: 04/22/2008] [Indexed: 02/08/2023]
Abstract
Chromosome movement is prominent during meiosis. Here, using a combination of in vitro and in vivo approaches, we elucidate the basis for dynamic mid-prophase telomere-led chromosome motion in budding yeast. Diverse findings reveal a process in which, at the pachytene stage, individual telomere/nuclear envelope (NE) ensembles attach passively to, and then move in concert with, nucleus-hugging actin cables that are continuous with the global cytoskeletal actin network. Other chromosomes move in concert with lead chromosome(s). The same process, in modulated form, explains the zygotene "bouquet" configuration in which, immediately preceding pachytene, chromosome ends colocalize dynamically in a restricted region of the NE. Mechanical properties of the system and biological roles of mid-prophase movement for meiosis, including recombination, are discussed.
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Affiliation(s)
- R Koszul
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, MA 02138, USA
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Kohno R, Hirano E, Kameoka S, Hotta K, Nishio T, Miyagishi T, Hallil A, Kawashima M, Ogino T. SU-GG-T-297: Measurements of Proton Dose Distributions Using a Thin Oxide MOSFET Detector. Med Phys 2008. [DOI: 10.1118/1.2962049] [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: 11/07/2022] Open
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Hashimoto K, Kawashima S, Kameoka S, Akiyama Y, Honjoya T, Ejima K, Sawada K. Comparison of image validity between cone beam computed tomography for dental use and multidetector row helical computed tomography. Dentomaxillofac Radiol 2008; 36:465-71. [PMID: 18033942 DOI: 10.1259/dmfr/22818643] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To evaluate and compare the image validity of a cone beam CT machine for dental use (3DX) and the latest medical CT system, multidetector row helical CT (MDCT). METHODS A dried right maxilla of an Asian adult was used as a phantom. It was cut from the zygomatic process towards the midline, parallel to the midline plane, into eight slices of 2 mm thickness. This phantom was imaged with the 3DX and MDCT machines. Images were evaluated by comparing them with one selected bone slice from the phantom. In this comparison, two types of MDCT images were used: one with the window level (WL) and window width (WW) suitable for observing teeth (MDCT tooth image), and the other appropriate for observing bone (MDCT bone image). Three dentists and one radiographer then used our reported subjective five-level scale to evaluate and compare images generated by the two systems in terms of validity. Cancellous bone as well as enamel, dentin, pulp cavity, periodontal ligament space, lamina dura and overall impression were evaluated. RESULTS Statistically significant differences (P<0.05) were found for almost all observation items. Our subjective evaluation clarified that 3DX was superior to MDCT in terms of image validity. Few significant intra- or interevaluator errors were found. CONCLUSIONS Our subjective evaluation of image validity clarified 3DX as being superior to MDCT. Taken together with the low skin dose we previously reported for 3DX, the results demonstrate 3DX to be beneficial for imaging diagnosis of hard tissues in the maxillofacial region.
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Affiliation(s)
- K Hashimoto
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, 1-8-13, Kanda Surugadai, Tokyo 101-8310, Japan.
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Kato T, Steers G, Campo L, Roberts H, Leek RD, Turley H, Kimura T, Kameoka S, Nishikawa T, Kobayashi M, Harris AL, Gatter KC, Pezzella F. Prognostic significance of microvessel density and other variables in Japanese and British patients with primary invasive breast cancer. Br J Cancer 2007; 97:1277-86. [PMID: 17923874 PMCID: PMC2360458 DOI: 10.1038/sj.bjc.6604015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
The purpose of this study is to investigate the associations of microvessel density (MVD) and other pathological variables with survival, and whether they accounted for survival differences between Japanese and British patients. One hundred seventy-three Japanese and 184 British patients were included in the study. British patients were significantly older (56.3±11.4 years vs 52.5±12.9 years; P<0.01) and had smaller tumours (2.2±1.3 vs 2.7±1.8 cm; P<0.01), which were more frequently oestrogen receptor positive (78.8 vs 57.2%, P<0.01), had more grade III tumours (29.9 vs 21.4%, P=0.04) and more infiltrating lobular carcinomas (13.6 vs 4.0%, P<0.01) and a higher MVD compared with Japanese patients (57.9±19.8 vs 53.2±18.6; P=0.01). However, no difference in the prevalence of lymph-node metastasis was found between them (39.1 vs 37.5%, P=0.75). Younger British patients (age <50 years) had the highest MVD compared with Japanese and older British patients (P<0.01). Japanese patients were proportionately more likely to receive chemotherapy than endocrine therapy (P<0.01). British patients had a significantly worse relapse-free survival and overall survival compared with Japanese patients, after statistical adjustment for variables (hazard ratio=2.1, 2.4, P<0.01, P<0.01, respectively), especially, in T2 stage, low MVD and older subgroup (HR: 3.6, 5.0; 3.1, 3.3; 3.2, 3.9, respectively), but only in ER negative cases (P=0.04, P=0.01, respectively). The present study shows that MVD contributes to the Japanese–British disparity in breast cancer. However, the MVD variability did not explain the survival differences between Japanese and British patients.
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-ku, Tokyo 162-8666, Japan.
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Abstract
A case of odontogenic myxoma is reported as showing a cyst-like pattern with a partially thick but vague and unclear radiopaque border between the left mandibular second premolar and first molar on rotational panoramic radiography. Internal structure of the lesion displayed radiolucency with a sparse and coarse trabecular pattern. No expansion of bucco-lingual cortical bone was apparent. The radiographic pattern of odontogenic myxoma did not resemble a tennis racket-like or straight, curved and coarse septal appearance on panoramic radiography, but characteristic findings were noted on cone beam CT. Cone beam CT may prove extremely useful in clarifying detailed internal structure and the state of margins.
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Affiliation(s)
- M Araki
- Department of Oral and Maxillofacial Radiology, Nihon University School of Dentistry, Tokyo, Japan.
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Kang BH, Bhang H, Kim EH, Kim JH, Kim MJ, Yim HJ, Ajimura S, Miyake Y, Aoki K, Nagae T, Noumi H, Outa H, Saha PK, Sato Y, Sekimoto M, Toyoda A, Banu A, Fukuda T, Hashimoto O, Kameoka S, Miura Y, Nakamura SN, Okayasu Y, Takahashi T, Tamura H, Tsukada K, Watanabe T, Hwang JI, Maruta T, Nakamura M, Okada S, Park H, Tanida K. Exclusive measurement of the nonmesonic weak decay of the lambda(5)He hypernucleus. Phys Rev Lett 2006; 96:062301. [PMID: 16605985 DOI: 10.1103/physrevlett.96.062301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2005] [Indexed: 05/08/2023]
Abstract
We performed a coincidence measurement of two nucleons emitted from the nonmesonic weak decay of lambda(5)He formed via the 6Li(pi+, K+) reaction. The energies of the two nucleons and the pair number distributions in the opening angle between them were measured. In both np and nn pairs, we observed a clean back-to-back correlation coming from the two-body weak reactions of lambda p --> np and lambda n --> nn, respectively. The ratio of the nucleon pair numbers was N(nn)/N(np) = 0.45 +/- 0.11(stat) +/- 0.03(syst) in the kinematic region of cos theta(NN) < -0.8. Since each decay mode was exclusively detected, the measured ratio should be close to the ratio of gamma(lambda p --> np)/gamma(lambda n --> nn). The ratio is consistent with recent theoretical calculations based on the heavy meson and/or direct-quark exchange picture.
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Affiliation(s)
- B H Kang
- Department of Physics, Seoul National University, Seoul 151-742, Korea
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27
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Ishiguro M, Mochizuki H, Sugihara K, Hirata K, Murata A, Hatakeyama K, Kotake K, Teramoto T, Takahashi K, Kameoka S, Satito Y, Maeda K, Hirai T, Ooue M, Shirouzu K. Surveillance for Multicentric Colorectal Cancers and Other Primary Cancers in Patients with Curative Surgery for Colorectal Cancer. ACTA ACUST UNITED AC 2006. [DOI: 10.3862/jcoloproctology.59.863] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Kato T, Prevo R, Steers G, Roberts H, Leek RD, Kimura T, Kameoka S, Nishikawa T, Kobayashi M, Jackson DG, Harris AL, Gatter KC, Pezzella F. A quantitative analysis of lymphatic vessels in human breast cancer, based on LYVE-1 immunoreactivity. Br J Cancer 2005; 93:1168-74. [PMID: 16251871 PMCID: PMC2361506 DOI: 10.1038/sj.bjc.6602844] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
This study was undertaken to determine the highly sensitive method for detecting tumour lymphatic vessels in all the fields of each slide (LV), lymphatic microvessel density (LMVD) and lymphatic vessel invasion (LVI) and to compare them with other prognostic parameters using immunohistochemical staining with polyclonal (PCAB) and monoclonal antibodies (MCAB) to the lymphatic vessel endothelial hyaluronan receptor-1 (LYVE-1), and the pan-endothelial marker factorVIII in a series of 67 human breast cancers. In all LYVE-1-stained sections, LV (some of which contained red blood cells) were frequently found localised in extralobular stroma, dermis, connective tissue stroma and adjacent to artery and vein, but were rare within the intralobular stroma or the tumour body (3/67 cases) or areas of widespread invasion. In contrast small blood vessels were observed in intra- and extralobular stroma in the factor VIII-stained sections. Quantitation of vessel numbers revealed that LYVE-1/PCAB detected a significantly larger number of LV than either H&E or LYVE-1/MCAB (P<0.0001). LYVE-1/PCAB detected LVI in 25/67 cases (37.3%) and their presence was significantly associated with both lymph node metastasis (χ2=4.698, P=0.0248) and unfavourable overall survival (OS) (P=0.0453), while not relapse- free survival (RFS) (P=0.2948). LMVD had no influence for RFS and OS (P=0.4879, P=0.1463, respectively). Our study demonstrates that immunohistochemistry with LYVE-1/PCAB is a highly sensitive method for detecting tumour LV/LVI in breast cancer and LVI is a useful prognostic indicator for lymphatic tumour dissemination.
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women's Medical University, Shinjuku-ku, Tokyo 162-8666, Japan.
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Chin S, Ikeda M, Ozaki M, Kameoka S. Protective Effect of Diltiazem on Hepatic Ischemia-Reperfusion Injury in Rats by Improving Liver Tissue Blood Flow. Transplant Proc 2005; 37:4556-9. [PMID: 16387169 DOI: 10.1016/j.transproceed.2005.11.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2005] [Indexed: 11/18/2022]
Abstract
BACKGROUND Cytosolic calcium ions are known to play an important role in ischemia-reperfusion (IR) injury. However, the protective effect of calcium channel blockers remains controversial in liver IR injury. Moreover, calcium channel blockers improve hepatic IR injury not due to blocking an increase in hepatic calcium concentration. Therefore, we hypothesized that calcium antagonists protected a liver from IR injury by a vasodilatory action rather than by the inhibition of an increase in Ca2+ within parenchymal cells. This study evaluated the effects of diltiazem, a calcium channel blocker, on liver energy metabolism and blood flow after IR injury. METHODS Twenty-seven rats underwent hepatic ischemia for 30 minutes followed by 60 minutes of reperfusion. The animals were allocated into group C (without drug); group D5 (diltiazem, 5 microg/kg per min); or group D10 (diltiazem, 10 microg/kg per min). Diltiazem was infused before laparotomy and then throughout the experiment. RESULTS After 60 minutes of reperfusion, liver tissue blood flow and ATP concentrations were significantly higher in group D10 than the other animals (both, P < .05). Changes in ATP values strongly correlated those observed in blood flow (R = 0.80, P < .001). CONCLUSION Diltiazem improved ATP-generating capacity during reperfusion by improving liver tissue blood flow. An improvement in hepatic tissue perfusion may be a therapeutic strategy for liver IR injury.
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Affiliation(s)
- S Chin
- Department of Surgery II, Tokyo Women's Medical University, School of Medicine, Tokyo, Japan.
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Oishi H, Shindo H, Shirotani N, Kameoka S. A nonsurgical technique to create an esophagostomy for difficult cases of percutaneous endoscopic gastrostomy. Surg Endosc 2003; 17:1224-7. [PMID: 12739113 DOI: 10.1007/s00464-002-8948-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2002] [Accepted: 11/13/2002] [Indexed: 01/27/2023]
Abstract
BACKGROUND We developed a minimally invasive technique of esophagostomy called percutaneous transesophageal gastrotubing (PTEG) using a rupture-free balloon (RFB) for enteral nutrition and drainage as well as percutaneous endoscopic gastrostomy (PEG). PTEG using RFB allows surgeons to create a nonsurgical esophagostomy even in difficult cases of PEG (i.e., total gastrectomized patients and massive ascites). METHODS To create the PTEG, a RFB is inserted into the esophagus through the nose and inflated. The RFB is punctured with a needle at the left neck under ultrasonographic vision. A guidewire is inserted through the needle, followed by dilatation of the punctured site using a dilator with sheath. Finally, the tube is inserted into the gastrointestinal tract and the sheath is peeled off. RESULTS From January 1998 to June 2002, we treated 115 patients using PTEG with a RFB and there were no major complications. Therapeutic results are as good as those for PEG and it took approximately 15 min to perform. CONCLUSIONS PTEG with RFB is as safe as PEG and is simple and less invasive. It can be used in some cases for which PEG is contraindicated.
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Affiliation(s)
- H Oishi
- Department of Surgery, Institute of Geriatrics, Tokyo Women's Medical University, 2-15-1-22F, Shibuya, Shibuya-Ku, Tokyo 150-0002, Japan.
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Kato T, Kameoka S, Kimura T, Nishikawa T, Kobayashi M. The combination of angiogenesis and blood vessel invasion as a prognostic indicator in primary breast cancer. Br J Cancer 2003; 88:1900-8. [PMID: 12799634 PMCID: PMC2741099 DOI: 10.1038/sj.bjc.6600921] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
This study was undertaken to examine the interaction between the combination of angiogenesis and blood vessel invasion (BVI) and haematogenous metastasis, and to determine the prognostic significance of that combination in predicting 20-year relapse-free survival (RFS) and overall survival (OS) rates in primary breast cancer. Five hundred and nine patients were studied. We investigated 11 factors, including average microvessel count (AMC)/BVI, lymph-node status (n), clinical tumour size (T), histological grade (HG), lymphatic vessel invasion (LVI), p53, proliferating cell nuclear antigen (PCNA), c-erbB-2, mitotic index (MI), apoptotic index, and tumour necrosis (TN). Blood vessel invasion was detected by both factor VIII-related antigen and elastica van Gieson staining. To evaluate the best objective method to quantify microvessel density in angiogenesis, AMC was employed. The rate of AMC-high and BVI-positive tumours was 32.6 and 29.3%, respectively. That of both AMC-high and BVI-positive tumours was 10.1%. Univariate analysis showed that AMC/BVI, n, T, HG, LVI, p53, PCNA, MI, and TN were significantly predictive of RFS and OS. By multivariate analysis, AMC/BVI was the strongest independent prognostic factor for 20-year RFS (relative risk (RR)=5.5; P<0.0001) and for 20-year OS (RR=4.3; P<0.0001). Lymph-node status was still considered a powerful prognostic indicator; however, the combination of AMC and BVI provided more reliable prognostic information than lymph-node status for haematogenous dissemination.
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women's Medical University, 8-1 Kawadacho, Shinjuku-ku, Tokyo 162-8666, Japan.
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Kikuchi K, Fujishiro Y, Totsuka K, Seshimo A, Kameoka S, Makimura K, Yamaguchi H. [A Case of central venous catheter-related infection with Malassezia sympodialis]. Nihon Ishinkin Gakkai Zasshi 2002; 42:220-2. [PMID: 11704751 DOI: 10.3314/jjmm.42.220] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We report a 63-year-old male with central venous catheter-related infection caused by Malassezia sympodialis after total gastrectomy for a gastric cancer. He had fever and his leukocyte counts and C-reactive protein were elevated 14 days after his operation. After his central venous hyperalimentation catheter was removed, the inflammatory signs immediately disappeared, suggesting an intravenous catheter-related infection. A yeast-like fungus was cultured in brain-heart infection semi-solid agar ten days later, and was diagnosed morphologically as Malassezia sp. This strain was identified as M. sympodialis by Tween assimilation test and was confirmed by whole-sequence of internal transcribed spacer 1 regions (ITS1). This is the first report of catheter-related infection caused by M. sympodialis. This strain grew and was subcultured on CHROMagar Candida, potato dextrose agar and Sabouraud agar. There have been no reports of such a lipid-independent Malassezia sp. except for M. pachydermatis. The mechanism of lipid independence of this strain is undetermined and future work is needed. Malassezia sp. is receiving increased attention as an etiologic pathogen of catheter-related fungemia in clinical microbiology laboratories and infectious disease sections.
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Affiliation(s)
- K Kikuchi
- Department of Infectious Disease, Tokyo Womens Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
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Oishi H, Shindo H, Shirotani N, Kameoka S. [Percutaneous trans-esophageal gastro-tubing (PTEG): experience of home care with a long-term PTEG]. Gan To Kagaku Ryoho 2001; 28 Suppl 1:141-6. [PMID: 11787282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
PURPOSE Percutaneous trans-esophageal gastro-tubing (PTEG) was developed as a new method of esophagostomy for drainage and feeding. It is especially easy to create a PTEG for patients in whom it is difficult to perform a percutaneous endoscopic gastrostomy (PEG). Here we report a satisfactory experience with a patient with dysphagia for whom we improved the patient's QOL with PTEG. The patient suffered from terrible dysphagia due to Parkinson's disease and was in the postoperative recovery status after undergoing a gastrectomy for gastric cancer. PTEG allowed the patient to receive further long-term medical care at home. CASE The patient was a 74-year-old man with severe dysphagia due to Parkinson's disease and had a residual stomach as a consequence of a gastrectomy. He had to continue receiving long-term enteral nutrition at home, however it was difficult to create a PEG. We therefore decided to use a PTEG. MATERIALS/METHOD For the PTEG, a rupture-free balloon (RFB) catheter for enteral nutrition was used. First, an RFB was inserted through the nose into the esophagus and inflated. The RFB was punctured percutaneously aided by ultrasonography and conventional fluoroscopy. Then, a guide wire followed by a dilator with a sheath were inserted. Finally, an indwelling catheter was inserted into the digestive tract through the sheath. REMARK PTEG using an RFB catheter was a safe, simple and less invasive method; it enabled the patient to continue receiving further medical treatment at home without major complications for a long term.
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Affiliation(s)
- H Oishi
- Dept. of Surgery, Aoyama Hospital, Tokyo Women's Medical University, School of Medicine
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Yamataka A, Segawa O, Yoshida R, Kobayashi H, Kameoka S, Miyano T. Laparoscopic muscle electrostimulation during laparoscopy-assisted anorectal pull-through for high imperforate anus. J Pediatr Surg 2001; 36:1659-61. [PMID: 11685696 DOI: 10.1053/jpsu.2001.27944] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
PURPOSE Our technique for laparoscopic muscle electrostimulation during laparoscopy-assisted anorectal pull-through (LAARPT) for high imperforate anus (HIA) in 3 patients is described. METHODS The distal rectum and rectourethral fistula is dissected laparoscopically. A muscle stimulator is passed through one of the trocars and used to identify the center of contraction of the levator ani. The same muscle stimulator is used to identify the center of the external sphincter muscle transcutaneously. An intravenous cannulation device (SURFLO Flash IV catheter, TERUMO, CO, Yamanashi, Japan) is inserted through this proposed anus and observed piercing the center of the levator ani. A guide wire is passed through the SURFLO, and a series of dilators are passed along it to create a canal for the colonic pull-through. An anoplasty then was performed. RESULTS Our technique was successful in all patients. Laparoscopic electrostimulation produced good levator ani contraction in patients I and II and weak contraction in patient III. Patients I and II have symmetrical anal contraction during rectal examination, but patient III has poor contraction. Stool frequency is decreasing in all. CONCLUSION Direct laparoscopic observation of levator ani contraction allows intraoperative assessment of functional contractility and assists in the accurate placement of the colonic pull-through.
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Kato T, Kameoka S, Kimura T, Soga N, Abe Y, Nishikawa T, Kobayashi M. Angiogenesis as a predictor of long-term survival for 377 Japanese patients with breast cancer. Breast Cancer Res Treat 2001; 70:65-74. [PMID: 11767005 DOI: 10.1023/a:1012534724488] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Angiogenesis. as assessed by microvessels, has been a common prognostic indicator for breast cancer in the last decade. However, the significance of angiogenesis remains controversial. This is a retrospective study of 377 Japanese patients selected from 663 breast cancer patients operated on between 1971 and 1987. To evaluate an objective method to quantify microvessel density in angiogenesis, we employed average microvessel count (AMC) per square millimeter. We investigated five factors: angiogenesis, lymph-node status (n), clinical tumor size (T), histological grade (HG). and tumor necrosis (TN), followed for a median of 10 years. Sixty-seven patients (17.8%) had recurrence and 54 patients (14.3%) died of breast cancer. Univariate analysis showed that n, T, HG. and AMC (P = 0.0020) were significantly predictive of 20-year relapse-free survival (RFS). n, T, and HG were significantly associated with 20-year overall survival (OS) but AMC was borderline significant (P = 0.0630). Multivariate analysis for RFS and OS showed that n. T. HG, and AMC (P < 0.0001, P = 0.0033, respectively) were all significant and independent prognostic factors. When stratified by T or n, a significant impact of AMC on RFS or OS was seen both in patients with T2 and T3 carcinomas or in node-negative patients, but not in T1 or node-positive patients. Thus, we can confirm angiogenesis as a significant independent prognostic factor associated with longterm survival in Japanese breast cancer patients, especially in node-negative patients and in patients with T2 and T3 carcinomas.
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women 's Medical University, Tokvo, Japan.
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Saito N, Mitsuhashi M, Hayashi T, Narumo C, Nagata H, Soyama K, Kameoka S, Harumiya S, Fujimoto D. Inhibition of hepatic metastasis in mice treated with cell-binding domain of human fibronectin and angiogenesis inhibitor TNP-470. Int J Clin Oncol 2001; 6:215-20. [PMID: 11723742 DOI: 10.1007/pl00012108] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND To prevent tumor metastasis, we administered the cell-binding domain of fibronectin, in combination with the angiogenesis inhibitor TNP-470, to mice with hepatic metastasis. We then assessed the prevention of tumor metastasis resulting from the inhibition of adhesive interactions and the inhibition of angiogenesis. METHODS A hepatic metastasis model was created by injecting 1 x 10(3) colon 26/TC-1 cells into the anterior mesenteric vein of CDF1 mice. The cell-binding domain obtained from fibronectin included the Arg-Gly-Asp (RGD) sequence. A fibronectin-binding domain (FND)-treated group, an FND plus TNP-470 group, and a control group were established. The animals were killed 4 weeks after the injections of the treatment agents had been completed and the number of metastatic liver nodules was counted. In a simultaneous experiment with the same design, the mice were not killed at 4 weeks, and their survival was observed. RESULTS The mean number of nodules in the FND plus TNP-470 group was significantly lower than that in the control group (P = 0.019337). The inhibition rate was 51% in the FND group, 60% in the FND 10 micrograms plus TNP-470 10 mg/kg group, and 64% in the FND 10 micrograms plus TNP-470 100 mg/kg group compared with the control group. Mice from the FND group that were not killed died after 6-8 weeks, but mice from the FND plus TNP-470 group died after 8-12 weeks. CONCLUSION The cell-binding domain of fibronectin may, potentially, be an effective form of antiadhesive therapy that competes with native adhesion molecules and blocks adhesion during the metastatic process. When the cell-binding domain of fibronectin is combined with TNP-470 to inhibit angiogenesis, more effective inhibition of metastatic tumor growth and prolongation of survival can be achieved than after treatment with the cell-binding domain alone.
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Affiliation(s)
- N Saito
- Department of Surgery II, Tokyo Women's Medical University School of Medicine, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan.
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Shirotani N, Kameoka S. [Home parenteral nutrition in adults]. Nihon Rinsho 2001; 59 Suppl 5:852-5. [PMID: 11439666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Affiliation(s)
- N Shirotani
- Department of Surgery II, Tokyo Women's Medical University School of Medicine
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Itabashi M, Shirotani N, Kameoka S. [The kinds and characteristics of blood accesses]. Nihon Rinsho 2001; 59 Suppl 5:215-9. [PMID: 11439523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- M Itabashi
- Department of Surgery II, Tokyo Women's Medical University
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Aratake K, Shirotani N, Kameoka S. [Know-how of catheter cannulation]. Nihon Rinsho 2001; 59 Suppl 5:220-4. [PMID: 11439524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- K Aratake
- Second Department of Surgery, Tokyo Women's Medical University
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Seshimo A, Shirotani N, Kameoka S. [Nutritional assessment in the elderly]. Nihon Rinsho 2001; 59 Suppl 5:829-32. [PMID: 11439660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- A Seshimo
- Second Department of Surgery, Tokyo Women's Medical University
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Shirotani N, Kameoka S. [Complication of HPN]. Nihon Rinsho 2001; 59 Suppl 5:856-9. [PMID: 11439667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Affiliation(s)
- N Shirotani
- Department of Surgery II, Tokyo Women's Medical University School of Medicine
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Kato T, Kameoka S, Kimura T, Nishikawa T, Kasajima T. Angiogenesis and blood vessel invasion as prognostic indicators for node-negative breast cancer. Breast Cancer Res Treat 2001; 65:203-15. [PMID: 11336242 DOI: 10.1023/a:1010668616265] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
This study was undertaken to determine the value of angiogenesis and blood vessel invasion (BVI) using both Factor VIII-related antigen and elastica van Gieson staining in predicting 20-year relapse-free survival (RFS) and 20-year overall survival (OS) rates in Japanese patients with node-negative breast cancer. Two hundred and sixty patients were studied. We investigated nine factors, including angiogenesis (average microvessel count (AMC)), BVI, proliferating cell nuclear antigen (PCNA), p53, c-erbB-2, clinical tumor size (T), histological grade, tumor necrosis, and lymphatic vessel invasion (LVI). Twenty-five patients (9.6%) had recurrence and 17 patients (6.5%) died of breast cancer. Univariate analysis showed that BVI, AMC, T, histological grade, PCNA, p53, and tumor necrosis were significantly predictive of RFS or OS. Multivariate analysis showed that AMC, BVI, and T were significant independent factors for RFS or OS. Moreover, the combination of AMC/BVI was an especially significant factor for RFS or OS (P < 0.0001, P = 0.0003, respectively). When stratified by T, a significant impact of AMC or BVI on RFS was seen in patients with T1, T2, and T3 carcinomas. Multivariate analysis in patients with T2 carcinoma showed that both AMC and BVI were significant independent factors for RFS (P = 0.0231, P = 0.0388, respectively) and OS (P = 0.0331 and P = 0.0479, respectively). AMC, BVI, and T were independent prognostic indicators. As the combined impact of AMC/BVI is especially strong, AMC/BVI is useful in selecting high-risk node-negative breast cancer patients who may be eligible to receive aggressive adjuvant chemotherapy.
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women's Medical University, Japan.
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Kato T, Kimura T, Ishii N, Fujii A, Yamamoto K, Kameoka S, Nishikawa T, Kasajima T. Pathologic evaluation of surgical margins and local recurrences after breast-conserving surgery without irradiation. World J Surg 2000; 24:328-33. [PMID: 10658068 DOI: 10.1007/s002689910052] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
This study was undertaken to evaluate the status of margins of the excised breast tissue using our own method. We also determined the indications for breast-conserving surgery without irradiation by examining the characteristics of patients with local recurrence and comparing relapse-free survival (RFS) and overall survival (OS) of patients who underwent wide excision without irradiation with those of 267 patients who underwent total mastectomy. Eighty-two patients with a 3 cm diameter or less invasive carcinoma were treated with wide excision and axillary dissection between 1987 and 1996. Patients who histologically had four or more axillary lymph node metastases, positive pathologic margins, or a high degree of in situ ductal carcinoma around the main tumor in consecutive step-sections were excluded from this study. During a median follow-up of 6 years (range 2-11 years), six patients (7.3%) had local recurrence and five (6.0%) had regional or distant recurrences as their site of first failure. At 11 years the life-table values for RFS and OS for the wide excision-treated group were 84.7% and 92.1%, respectively, compared with 85.0% and 90.0%, respectively, for patients treated by total mastectomy. RFS and OS were similar in the two treatment groups. Results in the present study indicate that if the patients treated by breast-conserving surgery are carefully selected and there are no foci in the pathologic margins, there is a low degree of in situ ductal carcinoma around the tumor, and no multicentricity, it might be unnecessary to administer
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
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Kameoka S, Suzuki T, Yuzaki K, Takeda T, Tanaka S, Ito S, Kunimori K, Miyadera T. Selective catalytic reduction of N2O with methane in the presence of excess oxygen over Fe-BEA zeolite. Chem Commun (Camb) 2000. [DOI: 10.1039/b001321h] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kato T, Kimura T, Miyakawa R, Fujii A, Yamamoto K, Kameoka S, Nishikawa T, Kasajima T. Clinicopathologic study associated with long-term survival in Japanese patients with node-negative breast cancer. Br J Cancer 2000; 82:404-11. [PMID: 10646896 PMCID: PMC2363303 DOI: 10.1054/bjoc.1999.0934] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
This study was undertaken to determine the absolute and relative value of blood vessel invasion (BVI) using both factor VIII-related antigen and elastica van Gieson staining, proliferating cell nuclear antigen (PCNA), p53, c-erbB-2, and conventional prognostic factors in predicting relapse-free survival (RFS) and overall survival (OS) rates associated with long-term survival in Japanese patients with node-negative breast cancer. Two hundred patients with histological node-negative breast cancer were studied. We investigated nine clinicopathological factors, including PCNA, p53, c-erbB-2 using permanent-section immunohistochemistry, clinical tumour size (T), histological grade (HG), mitotic index (MI), tumour necrosis (TN), lymphatic vessel invasion (LVI) and BVI, followed for a median of 10 years (range 1-20). Twenty-one patients (10.5%) had recurrence and 15 patients (7.5%) died of breast cancer. Univariate analysis showed that BVI, PCNA, T, HG, MI, p53, c-erbB-2 and LVI were significantly predictive of 20-year RFS or OS. Multivariate analysis showed that BVI (P = 0.0159, P = 0.0368), proliferating cell nuclear antigen (PCNA) (P = 0.0165, P = 0.0001), and T (P = 0.0190, P = 0.0399) were significantly independent prognostic factors for RFS or OS respectively. BVI, PCNA and T were independent prognostic indicators for RFS or OS in Japanese patients with node-negative breast cancer and are useful in selecting high-risk patients who may be eligible to receive strong adjuvant therapies.
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Affiliation(s)
- T Kato
- Department of Surgery II, School of Medicine, Tokyo Women's Medical University, Japan
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Matsumoto M, Shirotani N, Kameoka S. Clinical study on the ratio of glucose/fat in peripheral parenteral nutrition and the usage of a midline catheter. Surg Today 1999; 29:1040-6. [PMID: 10554328 DOI: 10.1007/s005950050642] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Two important unsolved questions related to peripheral parenteral nutrition are the ratio of components in the intravenous (IV) solution and catheter-related complications. The present study was undertaken to evaluate the nutritional profiles of three kinds of IV solutions with different ratios of components, while maintaining the total energy at about 1 200 kcal/day and the amino acid level at 60 g. The IV solution formulas used were as follows : glucose/fat = 2:1, osmolarity ratio = 3.3 for group A, glucose/fat = 1:1, osmolarity ratio = 3.1 for group B, and glucose/fat = 1:2, osmolarity ratio = 2.6 for group C. The incidence and severity of complications were then analyzed in relation to the type of IV solution used, the indwelling time, and the type of catheter (midline catheter or short peripheral catheter). The results of peripheral parenteral nutrition were favorable when the glucose/fat ratio of the IV solution was either 1:1 or 1:2. The midline catheter was inserted for an average of 11.9 +/- 4.0 days, and the incidence of catheter-related complications following parenteral nutrition with a midline catheter was low when the osmolarity ratio of the IV solution was 3.1 or less. These results indicate that a midline catheter is useful when administering peripheral parenteral nutrition.
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Affiliation(s)
- M Matsumoto
- Department of Surgery II, Tokyo Women's Medical University School of Medicine, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan
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Sawada T, Kato T, Kimura T, Kameoka S. [Estrogen and progesterone receptors]. Nihon Rinsho 1999; 57 Suppl:583-5. [PMID: 10778197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Affiliation(s)
- T Sawada
- Department of Pathology, Tokyo Women's Medical University
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Abstract
Dietary flavonoids are known to scavenge free radicals but little information is available on their roles in antioxidant protein gene expression. The goal of this paper is to investigate the effect of flavonoid treatment on the antioxidant protein expression in human intestinal Caco-2 cells. The antioxidant proteins of interest were metallothionein (MT), catalase (CAT), and superoxide dismutase (SOD). Treatment of Caco-2 cells with 100 microM genistein, biochanin A, daidzein or kaempferol significantly increased MT mRNA up to 15 fold. On the contrary, CAT mRNA level was not affected by various flavonoids. We also developed gel activity assays to determine the specific activities of CAT and Cu/Zn SOD in flavonoid-treated Caco-2 cells. Compared to the conventional spectrophotometric assays, the gel assays allow a separation of antioxidant activities of the enzymes from that of the flavonoids. CAT and Cu/Zn SOD were found not to be affected by 48-h treatment of 100 microM dietary flavonoids (genistein, biochanin A, daidzein, flavone, quercetin, or kaempferol). In conclusion, the effects of flavonoids on antioxidant protein expression are structure- and gene-specific. When evaluating antioxidant capacity of flavonoids, their ability to modulate antioxidant protein expression should also be taken into consideration.
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Affiliation(s)
- S Kameoka
- Department of Physical Therapy, Exercise and Nutrition Sciences, State University of New York at Buffalo, 14214, USA
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