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Kuwana M, Takehara K, Tanaka Y, Yamashita K, Katsumata K, Takata M, Shima Y. Efficacy and safety of tocilizumab in Japanese patients with systemic sclerosis and associated interstitial lung disease: A subgroup analysis of a global, randomised, controlled Phase 3 trial. Mod Rheumatol 2024; 34:530-540. [PMID: 37436828 DOI: 10.1093/mr/road068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/15/2023] [Accepted: 06/30/2023] [Indexed: 07/13/2023]
Abstract
OBJECTIVES The aim of this article is to investigate the efficacy and safety of tocilizumab in Japanese patients with systemic sclerosis. METHODS Post hoc subgroup analysis of a global, randomised, controlled trial in patients treated with weekly tocilizumab 162 mg or placebo subcutaneously in a 48-week double-blind period (tocilizumab and placebo groups) followed by tocilizumab for 48 weeks in an open-label extension (continuous-tocilizumab and placebo-tocilizumab groups). RESULTS Among 20 patients, 12 were randomised to tocilizumab (all had interstitial lung disease) and eight were randomised to placebo (six had interstitial lung disease). The modified Rodnan skin score improved in both treatment groups. The mean change in percent-predicted forced vital capacity was 3.3% [95% confidence interval (CI), -2.5 to 9.0] for tocilizumab and -3.8% (95% CI, -9.9 to 2.2) for placebo in the double-blind period and 2.0% (95% CI, -0.7 to 4.6) for continuous-tocilizumab and -1.4% (95% CI, -6.7 to 4.0) for placebo-tocilizumab in the open-label extension. Rates of serious adverse events per 100 patient-years were 19.3 for tocilizumab and 26.8 for placebo in the double-blind period and 0.0 for continuous-tocilizumab and 13.6 for placebo-tocilizumab in the open-label period. CONCLUSIONS The efficacy and safety of tocilizumab in patients with systemic sclerosis were consistent between the Japanese subpopulation and the global trial population.
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Affiliation(s)
- Masataka Kuwana
- Department of Allergy and Rheumatology, Nippon Medical School Graduate School of Medicine, Tokyo, Japan
| | - Kazuhiko Takehara
- Department of Dermatology, Faculty of Medicine, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Ishikawa, Japan
| | - Yoshiya Tanaka
- The First Department of Internal Medicine, University of Occupational and Environmental Health, Fukuoka, Japan
| | | | | | - Mai Takata
- Chugai Pharmaceutical Co., Ltd, Tokyo, Japan
| | - Yoshihito Shima
- Laboratory of Thermo-therapeutics for Vascular Dysfunction/Clinical Immunology, Osaka University Graduate School of Medicine, Osaka, Japan
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Katsumata K, Lovesey SW. A theory of the spin-crossover phenomena in the rare earth perovskite LaCoO 3induced by temperature or a magnetic field. J Phys Condens Matter 2023; 36:125803. [PMID: 38029432 DOI: 10.1088/1361-648x/ad10cb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 11/29/2023] [Indexed: 12/01/2023]
Abstract
Published magnetic data for LaCoO3are successfully analyzed with coexisting5Dand low-spin (LS) cobalt states. Energy levels of the two states are derived in analytic forms. To this end, fictitious orbital angular momentumlof magnitude one defines the Γ5(5D) state. Our Hamiltonian includes the spin-orbit interaction, and a cubic crystal field embellished by a trigonal distortion9B20(lz2-2/3)-80B40(lz2-9/10). A singlet ground state with an energy gap to the first excited doublet is realized for certain values of the parameters. The temperature-independent paramagnetic susceptibility (TIPS) of the5Dstate has a finite value, which accords with the observation. Whereas, TIPS is symmetry forbidden in the LS state. A rigorous calculation is made of the excitation spectrum in the LS state. The elementary excitation is modeled as a creation of an electron-hole pair that results in an energy level scheme in which the first excited quartet lies above the singlet ground state. The electron spin resonance data are successfully equated with transitions within the excited quartet. Available magnetization data delineate parameters in the5DHamiltonian. The temperature dependence of the susceptibility of our coexisting model is qualitatively reasonable. To improve on a quantitative outcome, we are led to introduce a temperature dependent concentration for the5Dand LS states. Calculated Bragg diffraction patterns gathered with x-rays tuned to the CoK-edge reveal potential to refine the current crystal structure and to shed light on the origin of the coexisting states.
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Affiliation(s)
- K Katsumata
- Independent researcher, 45-11 Kumanocho, Itabashi, Tokyo 173-0025, Japan
| | - S W Lovesey
- ISIS Facility, STFC, Didcot, Oxfordshire OX11 0QX, United Kingdom
- Diamond Light Source Ltd, Didcot, Oxfordshire OX11 0DE, United Kingdom
- Department of Physics, Oxford University, Oxford OX1 3PU, United Kingdom
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Enomoto M, Yamada T, Nakamura M, Ishiyama S, Yokomizo H, Kosugi C, Sonoda H, Ishibashi K, Kuramochi H, Nozawa K, Yoshida Y, Ohta R, Hasegawa S, Ichikawa D, Hashiguchi Y, Hirata K, Katsumata K, Ishida H, Koda K, Sakamoto K. 89P Biomarker analysis of regorafenib dose escalation study (RECC study): A phase II multicenter clinical trial in Japan. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.109] [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: 11/15/2022] Open
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Kuwabara H, Iwabuthi A, Soya R, Enomoto M, Ishizaki T, Tsuchida A, Nagakawa Y, Katsumata K, Sugimoto M. Salivary metabolomics for colorectal cancer detection. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz239.058] [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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Hagino H, Ito M, Hashimoto J, Yamamoto M, Endo K, Katsumata K, Asao Y, Matsumoto R, Nakano T, Mizunuma H, Nakamura T. Monthly oral ibandronate 100 mg is as effective as monthly intravenous ibandronate 1 mg in patients with various pathologies in the MOVEST study. J Bone Miner Metab 2018; 36:336-343. [PMID: 28389932 DOI: 10.1007/s00774-017-0839-2] [Citation(s) in RCA: 5] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Accepted: 03/29/2017] [Indexed: 11/27/2022]
Abstract
The non-inferiority of oral ibandronate 100 mg to intravenous (i.v.) ibandronate 1 mg in increasing lumbar spine (LS) bone mineral density (BMD) after 12 months of treatment was demonstrated in the randomized, phase III MOVEST study. We conducted subgroup analyses in the per-protocol set of the study (n = 183 oral ibandronate; n = 189 i.v. ibandronate). In patients with LS BMD T score ≥ -3.0 or < -3.0 at screening, LS BMD gains from baseline were 4.42 and 5.79%, respectively, with oral ibandronate, and 4.60 and 5.83%, respectively, with i.v. ibandronate. LS BMD gains in patients with or without prevalent vertebral fractures were 5.21 and 5.23%, respectively, with oral ibandronate, and 5.01 and 5.49%, respectively, with i.v. ibandronate. In patients aged <75 or ≥75 years, LS BMD gains were 5.46 and 4.51%, respectively, with oral ibandronate, and 5.25 and 5.77%, respectively, with i.v. ibandronate. LS BMD gains in patients with baseline 25-hydroxyvitamin D levels ≥20 or <20 ng/mL were 5.35 and 4.76%, respectively, with oral ibandronate, and 5.05 and 6.57%, respectively, with i.v. ibandronate. Similar results were obtained in patients with or without prior bisphosphonate (BP) treatment, and in those receiving osteoporosis drug treatment other than BPs. In conclusion, oral ibandronate 100 mg demonstrated comparable BMD gains with monthly i.v. ibandronate, and thus shows high utility in the lifestyle and disease conditions associated with osteoporosis in Japanese patients.
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Affiliation(s)
- Hiroshi Hagino
- Faculty of Medicine, School of Health Science and Rehabilitation Division, Tottori University, Tottori, Japan
| | - Masako Ito
- Center for Diversity and Inclusion, Nagasaki University, Nagasaki, Japan
| | | | | | - Koichi Endo
- Chugai Pharmaceutical Co., Ltd., Tokyo, Japan
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Bertolaccini ML, Lanchbury JS, Caliz AR, Katsumata K, Vaughan RW, Kondeatis E, Khamashta MA, Koike T, Hughes GRV, Atsumi T. Plasma Tumor Necrosis Factor α Levels and the –238* A Promoter Polymorphism in Patients with Antiphospholipid Syndrome. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1615676] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Summary
Objectives. To explore the possible involvement of the proinflammatory and prothrombotic cytokine TNFα in APS by determining the plasma levels in patients and to test for association of TNFA promoter polymorphisms and HLA class II genotypes with both plasma TNF and disease. Patients and Method. We studied 83 Caucasoid patients with APS and two groups of healthy controls. TNFα levels were determined in plasma from 35 patients’ and 21 controls using a highly sensitive sandwich ELISA. The full patient group was genotyped together with 95 ethnically matched healthy controls. -308 and -238 TNFA promoter polymorphisms were assessed by ARMS-PCR. HLA-DQB1, DQA1 and DRB1 genotypes were determined by PCR using sequence specific primers. Results. TNFα levels were significantly higher in patients with APS than healthy controls (median 2.95 pg/ml [range 0.51-10.75] vs. 0.95 pg/ml [0.51-1.6], respectively; p = 0.0001). Frequencies of TNFA-308*2 genotype did not differ between patients and controls. In contrast, TNFA-238*A positive genotype was more frequent in APS patients with arterial thrombosis and pregnancy loss than in controls (OR 3.7 [95% CI 1.37-10.1], p = 0.007 and OR 3.95 [95% CI 1.3-11.7], p = 0.01; respectively). DQB1*0303-DRB1*0701 haplotype was associated with TNFA-238*A in the control group (OR 96.0 [95% CI 9.6-959], p 0.0001) as well as in APS patient’s group (OR 54.2 [95% CI 9.6-306.5], p 0.0001). Conclusions. Raised plasma TNFα levels were found in patients with APS. As a prothrombotic and proinflammatory cytokine, TNFα may be involved in the development of clinical features of APS. The lack of correlation between the TNFA-238 polymorphism and plasma levels associated with disease suggests that the TNFα genetic marker may only indirectly relate to protein levels by virtue of allelic association with a functional marker which may reside in the HLA class II region.
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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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Takematsu E, Cho K, Hieda J, Nakai M, Katsumata K, Okada K, Niinomi M, Matsushita N. Adhesive strength of bioactive oxide layers fabricated on TNTZ alloy by three different alkali-solution treatments. J Mech Behav Biomed Mater 2016; 61:174-181. [PMID: 26866453 DOI: 10.1016/j.jmbbm.2015.12.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 12/29/2015] [Accepted: 12/30/2015] [Indexed: 11/27/2022]
Abstract
Bioactive oxide layers were fabricated on Ti-29Nb-13Ta-4.6Zr alloy (TNTZ) by three different alkali solution treatments: hydrothermal (H), electrochemical (E), and hydrothermal-electrochemical (HE). The adhesive strength of the oxide layer to the TNTZ substrate was measured to determine whether this process achieves sufficient adhesive strength for implant materials. Samples subjected to the HE process, in which a current of 15mA/cm(2) was applied at 90°C for 1h (HE90-1h), exhibited a comparatively higher adhesive strength of approximately 18MPa while still maintaining a sufficiently high bioactivity. Based on these results, an oxide layer fabricated on TNTZ by HE90-1h is considered appropriate for practical biomaterial application, though thicker oxide layers with many cracks can lead to a reduced adhesive strength.
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Affiliation(s)
- E Takematsu
- Department of Electrochemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226 8503, Japan
| | - K Cho
- Division of Materials and Manufacturing Science, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565 0871, Japan
| | - J Hieda
- Department of Mechanical Science and Technology, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan
| | - M Nakai
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 985 8577, Japan
| | - K Katsumata
- Photocatalysis International Research Center, Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278 8510, Japan
| | - K Okada
- Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan
| | - M Niinomi
- Institute for Materials Research, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 985 8577, Japan
| | - N Matsushita
- Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro, Tokyo 152 8550, Japan; Department of Electrochemistry, Tokyo Institute of Technology, 4259 Nagatsuta, Midori, Yokohama 226 8503, Japan.
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Nakamura T, Ito M, Hashimoto J, Shinomiya K, Asao Y, Katsumata K, Hagino H, Inoue T, Nakano T, Mizunuma H. Clinical efficacy and safety of monthly oral ibandronate 100 mg versus monthly intravenous ibandronate 1 mg in Japanese patients with primary osteoporosis. Osteoporos Int 2015; 26:2685-93. [PMID: 26001561 PMCID: PMC4605968 DOI: 10.1007/s00198-015-3175-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2015] [Accepted: 05/13/2015] [Indexed: 11/13/2022]
Abstract
UNLABELLED The MOVEST study evaluated the efficacy and safety of monthly oral ibandronate versus licensed monthly IV ibandronate in Japanese osteoporotic patients. Relative BMD gains after 12 months were 5.22 % oral and 5.34 % IV, showing non-inferiority of oral to IV ibandronate (primary endpoint). No new safety concerns were identified. INTRODUCTION The randomized, phase 3, double-blind MOVEST (Monthly Oral VErsus intravenouS ibandronaTe) study evaluated the efficacy and safety of monthly oral ibandronate versus the licensed monthly intravenous (IV) ibandronate regimen in Japanese patients with osteoporosis. METHODS Ambulatory patients aged ≥ 55 years with primary osteoporosis were randomized to receive oral ibandronate 100 mg/month plus monthly IV placebo, or IV ibandronate 1 mg/month plus monthly oral placebo. The primary endpoint was non-inferiority of oral versus IV ibandronate with respect to bone mineral density (BMD) gains at the lumbar spine after 12 months of treatment. RESULTS Four hundred twenty-two patients were enrolled with 372 patients in the per-protocol set (183 and 189 in the oral and IV ibandronate groups, respectively). The relative change from baseline in lumbar spine BMD values for the oral and IV ibandronate groups, respectively, was 5.22 % (95 % confidence interval [CI] 4.65, 5.80) and 5.34 % (95 % CI 4.78, 5.90). The least squares mean difference between the two groups was -0.23 % (95 % CI -0.97, 0.51), showing non-inferiority of oral ibandronate to IV ibandronate (non-inferiority limit = -1.60). Changes in BMD values at other sites, and bone turnover marker levels in the oral ibandronate group, were comparable with those of the IV group. The safety profile was similar to that previously demonstrated; no new safety concerns were identified. CONCLUSIONS This study demonstrated the non-inferiority of oral ibandronate 100 mg/month to IV ibandronate 1 mg/month (licensed dose in Japan) in increasing lumbar spine BMD in Japanese patients with primary osteoporosis.
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Affiliation(s)
- T Nakamura
- National Center for Global Health and Medicine, Tokyo, Japan
| | - M Ito
- Center for Gender Equality, Nagasaki University, Nagasaki, Japan
| | - J Hashimoto
- Chugai Pharmaceutical Co. Ltd., Tokyo, Japan.
| | - K Shinomiya
- Chugai Pharmaceutical Co. Ltd., Tokyo, Japan
| | - Y Asao
- Chugai Pharmaceutical Co. Ltd., Tokyo, Japan
| | - K Katsumata
- Chugai Pharmaceutical Co. Ltd., Tokyo, Japan
| | - H Hagino
- School of Health Science & Rehabilitation Division, Tottori University Faculty of Medicine, Tottori, Japan
| | - T Inoue
- Taisho Pharmaceutical Co. Ltd., Tokyo, Japan
| | - T Nakano
- Tamana Central Hospital, Kumamoto, Japan
| | - H Mizunuma
- Department of Obstetrics & Gynecology, Hirosaki University School of Medicine, Hirosaki, Japan
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Talley LD, Feely RA, Sloyan BM, Wanninkhof R, Baringer MO, Bullister JL, Carlson CA, Doney SC, Fine RA, Firing E, Gruber N, Hansell DA, Ishii M, Johnson GC, Katsumata K, Key RM, Kramp M, Langdon C, Macdonald AM, Mathis JT, McDonagh EL, Mecking S, Millero FJ, Mordy CW, Nakano T, Sabine CL, Smethie WM, Swift JH, Tanhua T, Thurnherr AM, Warner MJ, Zhang JZ. Changes in Ocean Heat, Carbon Content, and Ventilation: A Review of the First Decade of GO-SHIP Global Repeat Hydrography. Ann Rev Mar Sci 2015; 8:185-215. [PMID: 26515811 DOI: 10.1146/annurev-marine-052915-100829] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Global ship-based programs, with highly accurate, full water column physical and biogeochemical observations repeated decadally since the 1970s, provide a crucial resource for documenting ocean change. The ocean, a central component of Earth's climate system, is taking up most of Earth's excess anthropogenic heat, with about 19% of this excess in the abyssal ocean beneath 2,000 m, dominated by Southern Ocean warming. The ocean also has taken up about 27% of anthropogenic carbon, resulting in acidification of the upper ocean. Increased stratification has resulted in a decline in oxygen and increase in nutrients in the Northern Hemisphere thermocline and an expansion of tropical oxygen minimum zones. Southern Hemisphere thermocline oxygen increased in the 2000s owing to stronger wind forcing and ventilation. The most recent decade of global hydrography has mapped dissolved organic carbon, a large, bioactive reservoir, for the first time and quantified its contribution to export production (∼20%) and deep-ocean oxygen utilization. Ship-based measurements also show that vertical diffusivity increases from a minimum in the thermocline to a maximum within the bottom 1,500 m, shifting our physical paradigm of the ocean's overturning circulation.
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Affiliation(s)
- L D Talley
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093; ,
| | - R A Feely
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington 98115; , , , ,
| | - B M Sloyan
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Hobart, Tasmania 7001, Australia;
| | - R Wanninkhof
- Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Miami, Florida 33149; , ,
| | - M O Baringer
- Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Miami, Florida 33149; , ,
| | - J L Bullister
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington 98115; , , , ,
| | - C A Carlson
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, Santa Barbara, California 93106;
| | - S C Doney
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543; ,
| | - R A Fine
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149; , , ,
| | - E Firing
- Department of Oceanography, University of Hawai'i at Mānoa, Honolulu, Hawaii 96822;
| | - N Gruber
- Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich, Zurich 8092, Switzerland;
| | - D A Hansell
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149; , , ,
| | - M Ishii
- Meteorological Research Institute, Japan Meteorological Agency, Tsukuba 305-0052, Japan;
| | - G C Johnson
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington 98115; , , , ,
| | - K Katsumata
- Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokosuka 237-0061, Japan;
| | - R M Key
- Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, New Jersey 08544;
| | - M Kramp
- JCOMM in-situ Observations Programme Support Center (JCOMMOPS), Technopôle Brest Iroise, Plouzané 29280, France;
| | - C Langdon
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149; , , ,
| | - A M Macdonald
- Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543; ,
| | - J T Mathis
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington 98115; , , , ,
| | - E L McDonagh
- National Oceanography Centre, Southampton SO14 3ZH, United Kingdom;
| | - S Mecking
- Applied Physics Laboratory, University of Washington, Seattle, Washington 98105;
| | - F J Millero
- Rosenstiel School of Marine and Atmospheric Science, University of Miami, Miami, Florida 33149; , , ,
| | - C W Mordy
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington 98115; , , , ,
- Joint Institute for the Study of the Atmosphere and Ocean, University of Washington, Seattle, Washington 98195;
| | - T Nakano
- Japan Meteorological Agency, Tokyo 100-8122, Japan;
| | - C L Sabine
- Pacific Marine Environmental Laboratory, National Oceanic and Atmospheric Administration, Seattle, Washington 98115; , , , ,
| | - W M Smethie
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964; ,
| | - J H Swift
- Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California 92093; ,
| | - T Tanhua
- GEOMAR Helmholtz Centre for Ocean Research Kiel, 24015 Kiel, Germany;
| | - A M Thurnherr
- Lamont-Doherty Earth Observatory, Columbia University, Palisades, New York 10964; ,
| | - M J Warner
- School of Oceanography, University of Washington, Seattle, Washington 98195;
| | - J-Z Zhang
- Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, Miami, Florida 33149; , ,
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Sadahiro S, Tsuchiya T, Sasaki K, Kondo K, Katsumata K, Nishimura G, Kakeji Y, Baba H, Sato S, Koda K, Yamaguchi Y, Morita T, Matsuoka J, Usuki H, Hamada C, Kodaira S. Randomized phase III trial of treatment duration for oral uracil and tegafur plus leucovorin as adjuvant chemotherapy for patients with stage IIB/III colon cancer: final results of JFMC33-0502. Ann Oncol 2015; 26:2274-80. [PMID: 26347106 PMCID: PMC4621030 DOI: 10.1093/annonc/mdv358] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 08/17/2015] [Indexed: 01/18/2023] Open
Abstract
While adjuvant chemotherapy is preferable for colon cancer, treatment duration is controversial. This phase III trial is investigated optimal duration of adjuvant chemotherapy for Stage IIB/III colon cancer. Eighteen-month treatment with UFT/LV did not improve DFS compared with 6-month UFT/LV treatment. This study suggests that 6 months treatment duration is enough for Stage IIB/III colon cancer. Background While adjuvant chemotherapy is preferable for high-risk colon cancer, treatment duration is controversial. Oral uracil and tegafur (UFT)/leucovorin (LV) is widely used as a standard adjuvant chemotherapy for colon cancer in Japan. We conducted a phase III trial to investigate the optimal duration of adjuvant chemotherapy for stage IIB/III colon cancer. Patients and methods Patients with curatively resected stage IIB/III colon cancer were eligible for enrollment in this trial. Patients were registered within 6 weeks after surgery and were randomly assigned to receive UFT/LV for 28 of 35 days for 6 months in the control group or for 5 consecutive days per week for 18 months in the study group. The primary end point was the disease-free survival (DFS), and the secondary end points were overall survival (OS) and safety. Result A total of 1071 patients were registered from 233 centers. A statistically significant difference in DFS was not observed between the study group and the control group; the 5-year DFS was 69% in the study group and 69% in the control group. The 5-year OS was 85% in the study group and 85% in the control group. Conclusion Eighteen-month treatment with UFT/LV did not improve DFS or OS compared with 6-month UFT/LV treatment in patients with stage IIB/III colon cancer. The important finding from this study is that not 18 months but 6 months of treatment is enough for postoperative UFT/LV for stage IIB/III colon cancer. Clinical trial number UMIN-CTR C000000245.
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Affiliation(s)
- S Sadahiro
- Department of Surgery, Tokai University, Isehara
| | - T Tsuchiya
- Department of Surgery, Sendai City Medical Center, Sendai
| | - K Sasaki
- Department of Surgery, Otaru Ekisaikai Hospital, Otaru
| | - K Kondo
- Department of Surgery, National Hospital Organization Nagoya Medical Hospital, Nagoya
| | - K Katsumata
- Third Department of Surgery, Tokyo Medical University, Tokyo
| | - G Nishimura
- Department of Surgery, Japanese Red Cross Kanazawa Hospital, Ishikawa
| | - Y Kakeji
- Division of Gastrointestinal Surgery, Department of Surgery, Graduate School of Medicine, Kobe University, Kobe
| | - H Baba
- Department of Gastroenterological Surgery, Kumamoto University, Kumamoto
| | - S Sato
- Department of Surgery, National Hospital Organization Himeji Medical Center, Himeji
| | - K Koda
- Department of Surgery, Teikyo University Chiba Medical Center, Ichihara
| | - Y Yamaguchi
- Department of Clinical Oncology, Kawasaki Medical School, Kurashiki
| | - T Morita
- Department of Surgery, Aomori Prefectural Central Hospital, Aomori
| | - J Matsuoka
- Department of Palliative Care, Okayama University Hospital, Okayama
| | - H Usuki
- Department of Gastroenterological Surgery, Kagawa University, Kagawa
| | - C Hamada
- Department of Management Science, Graduate School of Engineering, Tokyo University of Science, Tokyo
| | - S Kodaira
- Nerima General Hospital, 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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13
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Katsumata K, Sumi T, Enomoto M, Mori Y, Aoki T. Analysis of Autonomic Nerve Preservation and Pouch Reconstruction Influencing Fragmentation of Defecation after Sphincter-Preserving Surgery for Rectal Cancer. Eur Surg Res 2010; 45:338-43. [DOI: 10.1159/000318604] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Accepted: 07/02/2010] [Indexed: 11/19/2022]
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14
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Affiliation(s)
- K. Katsumata
- Research Institute for Global Change JAMSTEC Yokosuka Japan
| | - S. E. Wijffels
- Marine and Atmospheric Research CSIRO Hobart, Tasmania Australia
| | - C. R. Steinberg
- Australian Institute of Marine Science Townsville, Queensland Australia
| | - R. Brinkman
- Australian Institute of Marine Science Townsville, Queensland Australia
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15
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Narumi Y, Kindo K, Katsumata K, Kawauchi M, Broennimann C, Staub U, Toyokawa H, Tanaka Y, Kikkawa A, Yamamoto T, Hagiwara M, Ishikawa T, Kitamura H. X-ray diffractometer combining synchrotron radiation and pulsed magnetic fields up to 40 T. J Synchrotron Radiat 2006; 13:271-4. [PMID: 16645253 DOI: 10.1107/s0909049506006972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2005] [Accepted: 02/24/2006] [Indexed: 05/08/2023]
Abstract
A synchrotron X-ray diffractometer incorporating a pulsed field magnet for high fields up to 40 T has been developed and a detailed description of this instrument is reported. The pulsed field magnet is composed of two coaxial coils with a gap of 3 mm at the mid-plane for passage of the X-rays. The pixel detector PILATUS 100K is used to store the diffracted X-rays. As a test of this instrument, X-ray diffraction by a powder sample of the antiferromagnet CoO is measured below the Néel temperature. A field-dependent lattice distortion of CoO due to magnetostriction is observed up to 38 T.
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Affiliation(s)
- Y Narumi
- ISSP, University of Tokyo, Kashiwa, Chiba 277-858, Japan.
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16
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Mannix D, Tanaka Y, Carbone D, Bernhoeft N, Katsumata K, Kunii S. Light on phase IV in Ce 0.7La 0.3B 6. Acta Crystallogr A 2005. [DOI: 10.1107/s0108767305082292] [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: 04/03/2023] Open
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17
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Honda Z, Katsumata K, Kikkawa A, Yamada K. Thermodynamic properties in the approach to the quantum critical point of the spin-ladder material Na2Co2(C2O4)3(H2O)2. Phys Rev Lett 2005; 95:087204. [PMID: 16196897 DOI: 10.1103/physrevlett.95.087204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2005] [Indexed: 05/04/2023]
Abstract
Magnetic susceptibility and heat capacity measurements as a function of temperature on a single-crystal sample of a spin-ladder material, Na2Co2(C2O4)3(H2O)2, are reported. Principal susceptibilities, parallel and perpendicular to the ladder direction, respectively, show broad maxima around 22 and 17 K. Both susceptibilities decay exponentially down to about 5 K and thereafter they are essentially independent of temperature. These findings amount to a signature of a quantum phase transition from a spin-liquid to Néel ordered state previously predicted theoretically. No anomaly is found in the heat capacity around the transition temperature.
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Affiliation(s)
- Z Honda
- Faculty of Engineering, Saitama University, Urawa, Saitama 338-8570, Japan
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18
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Sanchez ML, Katsumata K, Atsumi T, Romero FI, Bertolaccini ML, Funke A, Amengual O, Kondeatis E, Vaughan RW, Cox A, Hughes GRV, Khamashta MA. Association of HLA-DM polymorphism with the production of antiphospholipid antibodies. Ann Rheum Dis 2004; 63:1645-8. [PMID: 15547089 PMCID: PMC1754864 DOI: 10.1136/ard.2003.015552] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [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: 11/04/2022]
Abstract
OBJECTIVE To investigate whether variation in the HLA-DM gene is important in producing a group of pathogenic autoantibodies-antiphospholipid antibodies (aPL)-on the basis that HLA class II restricted antigen presentation is involved in the production of aPL. METHODS HLA-DMA and DMB polymorphisms were genotyped by polymerase chain reaction combined with restriction enzyme digestion in 51 white patients with primary antiphospholipid syndrome (APS), 82 with systemic lupus erythematosus (SLE) (42 with APS and 40 without APS), and 109 healthy white controls. The association with the aPL profile was examined. RESULTS The distribution of DMA alleles in APS patients and in patients with APS associated with SLE was significantly different from that in controls by 4x2 chi(2) test with 3 degrees of freedom (p = 0.035 and 0.011, respectively), but it was not different between SLE patients without APS and controls. The allelic distribution of DMA was also different between patients with IgG class anticardiolipin antibody or those with lupus anticoagulant (LA) and controls (p = 0.012 and 0.007, respectively) and between patients with and without LA among SLE patients (p = 0.035). All these differences included the increase in DMA*0102 in the former groups. CONCLUSIONS The results suggest that HLA-DMA*0102 or its linked gene(s) form one of the genetic risks for the production of aPL.
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Affiliation(s)
- M L Sanchez
- Lupus Research Unit, The Rayne Institute, St Thomas' Hospital, London, SE1 7EH, UK
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19
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Hagiwara M, Honda Z, Katsumata K, Kolezhuk AK, Mikeska HJ. Zeeman levels with exotic field dependence in the high field phase of an S=1 Heisenberg antiferromagnetic chain. Phys Rev Lett 2003; 91:177601. [PMID: 14611376 DOI: 10.1103/physrevlett.91.177601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2003] [Indexed: 05/24/2023]
Abstract
We have performed electron spin resonance measurements over a wide frequency and magnetic field range on a single crystal of the S=1 quasi-one-dimensional Heisenberg antiferromagnet Ni(C5H14N2)2N3(PF6). We observed gapped excitation branches above the critical field H(c) where the Haldane gap closes. These branches are analyzed by a phenomenological field theory using the complex-field phi(4) model. A satisfactory agreement between experiment and theory is obtained.
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Affiliation(s)
- M Hagiwara
- RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198, Japan
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20
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Hirata M, Katsumata K, Endo K, Fukushima N, Ohkawa H, Fukagawa M. In subtotally nephrectomized rats 22-oxacalcitriol suppresses parathyroid hormone with less risk of cardiovascular calcification or deterioration of residual renal function than 1,25(OH)2 vitamin D3. Nephrol Dial Transplant 2003; 18:1770-6. [PMID: 12937223 DOI: 10.1093/ndt/gfg296] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.5] [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: 11/14/2022] Open
Abstract
BACKGROUND Although it effectively suppresses parathyroid hormone (PTH) secretion, vitamin D [1,25(OH)(2)D(3)] therapy often causes tissue calcification over the long term. In patients on chronic dialysis, cardiovascular calcification is clearly linked to an unfavourable prognosis. In pre-dialysis patients, renal calcification of the kidney leads to the deterioration of renal function. METHODS We compared the propensities of 22-oxacalcitriol (OCT), with lesser calcaemic action, and 1,25(OH)(2)D(3) for producing their potential side effects in rats: (i) metastatic calcification of heart and aorta, and (ii) renal dysfunction with nephrocalcinosis, using the same effective doses for hyperparathyroidism. OCT (1.25 and 6.25 micro g/kg) or 1,25(OH)(2)D(3) (0.125 and 0.625 micro g/kg) solutions were administered intravenously to subtotally nephrectomized (SNX) rats three times weekly for 2 weeks. RESULTS Despite the suppression of PTH to comparable levels, the calcification of the hearts, aortas and kidneys in the 1,25(OH)(2)D(3)-treated group was significantly greater than in the OCT-treated group. Of interest was that, in the OCT (6.25 micro g/kg) group, the degree of calcification in hearts, aortas and kidneys were distinctly lower than those in the 1,25(OH)(2)D(3) (0.125 micro g/kg) group despite the comparable serum Ca x Pi products. Therefore, there may be different mechanisms behind the calcifications resulting from OCT and 1,25(OH)(2)D(3). Deterioration of renal function, tubular changes, and atypical hyperplasia of proximal tubules associated with calcification were more severe in the 1,25(OH)(2)D(3)-treated group than in the OCT-treated group. CONCLUSIONS These results indicate that OCT may be an effective agent for the suppression of PTH with a lesser risk of cardiovascular calcification or deterioration of residual renal function.
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Affiliation(s)
- Michinori Hirata
- Fuji Gotemba Research Labs, Chugai Pharmaceutical Co., Ltd, Shizuoka, Japan
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Katsumata K, Kusano K, Hirata M, Tsunemi K, Nagano N, Burke SK, Fukushima N. Sevelamer hydrochloride prevents ectopic calcification and renal osteodystrophy in chronic renal failure rats. Kidney Int 2003; 64:441-50. [PMID: 12846739 DOI: 10.1046/j.1523-1755.2003.00126.x] [Citation(s) in RCA: 126] [Impact Index Per Article: 6.0] [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: 11/20/2022]
Abstract
BACKGROUND Hyperphosphatemia is associated with severe complications, including ectopic calcification of soft tissues, secondary hyperparathyroidism, and renal osteodystrophy (ROD). Sevelamer hydrochloride is a nonabsorbed calcium- and metal-free phosphate binder that lowers serum phosphorus levels in hemodialysis patients. This study examined the efficacy of sevelamer in preventing ectopic calcification of soft tissues and ROD in adenine-induced renal failure rats. METHODS Male, 12-week-old Wistar-Jcl rats were freely fed an adenine diet (0.75 g adenine in 100 g normal diet) for four weeks. After three weeks of the adenine diet, when serum phosphorus levels had significantly increased, the rats were freely fed a normal diet that contained 1% or 2% of sevelamer for another five weeks. Time course changes of serum levels of phosphorus, calcium, and parathyroid hormone (PTH) were measured. At the end of the study, calcium and phosphorus levels in the heart and aorta were measured, and the calcification of kidney, heart, aorta, and stomach were histopathologically examined. The severity of ROD was evaluated by a histopathologic and morphometric analysis of the femurs. RESULTS Compared with the adenine controls (N = 10), the sevelamer-treated (1%, N = 6; and 2%, N = 10) groups of adenine-induced renal failure rats had reduced serum phosphorus, serum calcium x phosphorus product, and serum PTH levels. Moreover, in the treatment groups, sevelamer suppressed calcification of the aorta media, and also the osteoid volume, fibrosis volume, and porosity ratio of femurs. CONCLUSION These results suggest that sevelamer treatment might contribute to the suppression of ectopic calcification and ROD.
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Affiliation(s)
- Kyoko Katsumata
- Fuji Gotemba Research Laboratory, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
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Hirata M, Endo K, Katsumata K, Ichikawa F, Kubodera N, Fukagawa M. A comparison between 1,25-dihydroxy-22-oxavitamin D(3) and 1,25-dihydroxyvitamin D(3) regarding suppression of parathyroid hormone secretion and calcaemic action. Nephrol Dial Transplant 2003; 17 Suppl 10:41-5. [PMID: 12386268 DOI: 10.1093/ndt/17.suppl_10.41] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 11/13/2022] Open
Abstract
BACKGROUND Since Slatopolsky et al. (J Clin Invest 1984; 74: 2136-2143) reported the effect of active vitamin D, 1,25-dihydroxyvitamin D(3) (1,25(OH)(2)D(3)), on secondary hyperparathyroidism (2HPT) which accompanies chronic renal failure, there have been several studies of the therapeutic effects of 1,25(OH)(2)D(3) in this disease. Although parathyroid hormone (PTH) is suppressed by treatment with 1,25(OH)(2)D(3), long-term treatment with 1,25(OH)(2)D(3) tends to induce hypercalcaemia. Therefore, an analogue of 1,25(OH)(2)D(3), 1,25-dihydroxy-22-oxavitamin D(3) (22-oxacalcitriol, OCT) with less calcaemic activity, was developed for the treatment of 2HPT. METHODS In order to clarify the differences between the effects of 1,25(OH)(2)D(3) and OCT on 2HPT associated with chronic renal failure, these compounds were administered by intermittent i.v. injection for 2 weeks in rats with mild to moderate uraemia. RESULTS 1,25(OH)(2)D(3) markedly suppressed PTH levels, but increased serum calcium (Ca). OCT also markedly suppressed PTH levels, but induced only a slight increase in serum Ca. 1,25(OH)(2)D(3) caused a dose-dependent decrease in body weight, whereas OCT had no effect on body weight in uraemic rats. Based on those doses of OCT and 1,25(OH)(2)D(3), which resulted in a 60% suppression of PTH, and induced hypercalcaemia, we consider the relative ratios for efficacy and Ca-elevating activity between OCT and 1,25(OH)(2)D(3) to be 1 : 8 and 1 : 48, respectively. CONCLUSIONS OCT suppressed PTH levels with a slight increase in serum Ca without changing the body weight in uraemic rats. This observation suggests that OCT might be a useful vitamin D analogue for 2HPT management in long-term clinical treatment.
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Affiliation(s)
- Michinori Hirata
- Fuji Gotemba Research Labs, Chugai Pharmaceutical Co, Ltd, Shizuoka, Japan
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Hirata M, Makibayashi K, Katsumata K, Kusano K, Watanabe T, Fukushima N, Doi T. 22-Oxacalcitriol prevents progressive glomerulosclerosis without adversely affecting calcium and phosphorus metabolism in subtotally nephrectomized rats. Nephrol Dial Transplant 2002; 17:2132-7. [PMID: 12454223 DOI: 10.1093/ndt/17.12.2132] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.7] [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] Open
Abstract
BACKGROUND 22-Oxacalcitriol (OCT), an analogue of vitamin D, has been shown to inhibit cell proliferation in cultured mesangial cells. OCT also prevented albuminuria and glomerular injury in an acute model of anti-Thy1 glomerulonephritis. However, potential side effects, including calcaemic actions and tubular dysfunction, of chronic OCT treatment remain unclear. In the present study, we evaluated the effect of OCT in a chronic model of progressive glomerulosclerosis in subtotally nephrectomized (SNX) rats. METHODS At one week after subtotal nephrectomy, SNX rats were divided into 3 groups having equivalent serum creatinine levels and body weight. OCT (0.08 or 0.4 micro g/kg body weight) was administered intravenously three times per week for 8 weeks to SNX rats. We evaluated effects of OCT on renal function during treatment and on morphologic parameters in glomeruli at 8 weeks. We additionally measured calcium and phosphate levels in serum and urine, and tubular dysfunction markers, including beta(2)-microgloblin (beta(2)m) and N-acetyl-beta-D-glycosaminidase (NAG) levels in urine. RESULTS OCT treatment significantly suppressed urinary albumin excretion, prevented increases in serum creatinine and serum urea nitrogen, and inhibited glomerular cell number, glomerulosclerosis ratio and glomerular volume in SNX rats at 8 weeks. At that time, OCT-treated groups did not show hypercalcaemia, hypercalciuria or hyperphosphaturia. Furthermore, OCT treatment did not affect beta(2)m or NAG levels in urine, and did not induce histological changes in tubular or interstitial regions. CONCLUSIONS These findings suggest that OCT may provide a clinically useful agent for preventing the progression of glomerulosclerosis without adversely affecting calcium and phosphorus metabolism or causing subsequent tubular dysfunction.
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Affiliation(s)
- Michinori Hirata
- Fuji Gotemba Research Laboratories, Chugai Pharmaceutical Co. Ltd, Shizuoka, Japan.
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25
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Zheludev A, Honda Z, Chen Y, Broholm CL, Katsumata K, Shapiro SM. Quasielastic neutron scattering in the high-field phase of a Haldane antiferromagnet. Phys Rev Lett 2002; 88:077206. [PMID: 11863937 DOI: 10.1103/physrevlett.88.077206] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2001] [Indexed: 05/23/2023]
Abstract
Inelastic neutron scattering experiments on the Haldane-gap quantum antiferromagnet Ni(C5D14N2)2-N3(PF6) are performed in magnetic fields below and above the critical field H(c) at which the gap closes. Quasielastic neutron scattering is found for H>H(c), indicating topological excitations in the high-field phase.
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Affiliation(s)
- A Zheludev
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000, USA
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Katsumata K. Persuading singlet ground states to order. Polyhedron 2001. [DOI: 10.1016/s0277-5387(01)00681-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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27
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Chen Y, Honda Z, Zheludev A, Broholm C, Katsumata K, Shapiro SM. Field-induced three- and two-dimensional freezing in a quantum spin liquid. Phys Rev Lett 2001; 86:1618-1621. [PMID: 11290207 DOI: 10.1103/physrevlett.86.1618] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2000] [Indexed: 05/23/2023]
Abstract
Field-induced commensurate transverse magnetic ordering is observed in the Haldane-gap compound Ni(C(5)D(14)N(2))2N(3)(PF(6)) by means of neutron diffraction. Depending on the direction of applied field, the high-field phase is shown to be either a three-dimensional ordered Néel state or a short-range ordered state with dominant two-dimensional spin correlations. The structure of the high-field phase is determined, and properties of the observed quantum phase transition are discussed.
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Affiliation(s)
- Y Chen
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
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28
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Bertolaccini ML, Atsumi T, Lanchbury JS, Caliz AR, Katsumata K, Vaughan RW, Kondeatis E, Khamashta MA, Koike T, Hughes GR. Plasma tumor necrosis factor alpha levels and the -238*A promoter polymorphism in patients with antiphospholipid syndrome. Thromb Haemost 2001; 85:198-203. [PMID: 11246532] [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: 02/19/2023]
Abstract
OBJECTIVES To explore the possible involvement of the proinflammatory and prothrombotic cytokine TNFalpha in APS by determining the plasma levels in patients and to test for association of TNFA promoter polymorphisms and HLA class II genotypes with both plasma TNFalpha and disease. PATIENTS AND METHOD We studied 83 Caucasoid patients with APS and two groups of healthy controls. TNFalpha levels were determined in plasma from 35 patients' and 21 controls using a highly sensitive sandwich ELISA. The full patient group was genotyped together with 95 ethnically matched healthy controls. -308 and -238 TNFA promoter polymorphisms were assessed by ARMS-PCR. HLA-DQB1, DQA1 and DRB1 genotypes were determined by PCR using sequence specific primers. RESULTS TNFalpha levels were significantly higher in patients with APS than healthy controls (median 2.95 pg/ml [range 0.51-10.75] vs. 0.95 pg/ml [0.51-1.6], respectively; p = 0.0001). Frequencies of TNFA-308*2 genotype did not differ between patients and controls. In contrast, TNFA-238*A positive genotype was more frequent in APS patients with arterial thrombosis and pregnancy loss than in controls (OR 3.7 [95% CI 1.37-10.1], p = 0.007 and OR 3.95 [95% CI 1.3-11.7], p = 0.01; respectively). DQB1*0303-DRB1*0701 haplotype was associated with TNFA-238*A in the control group (OR 96.0 [95% CI 9.6-959], p <0.0001) as well as in APS patient's group (OR 54.2 [95% CI 9.6-306.5], p <0.0001). CONCLUSIONS Raised plasma TNFalpha levels were found in patients with APS. As a prothrombotic and proinflammatory cytokine, TNFalpha may be involved in the development of clinical features of APS. The lack of correlation between the TNFA-238 polymorphism and plasma levels associated with disease suggests that the TNF genetic marker may only indirectly relate to protein levels by virtue of allelic association with a functional marker which may reside in the HLA class II region.
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Affiliation(s)
- M L Bertolaccini
- Lupus Research Unit, The Rayne Institute, St Thomas' Hospital, London, UK
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Yamada Y, Shimasaki H, Okamura Y, Ono Y, Katsumata K. Mössbauer study of the reaction of laser-evaporated iron atoms with nitrogen molecules in low-temperature argon matrices. Appl Radiat Isot 2001; 54:21-7. [PMID: 11144249 DOI: 10.1016/s0969-8043(00)00181-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Reaction products of laser-evaporated iron atoms with nitrogen molecules were investigated using a low-temperature matrix isolation technique. The products observed in the Mössbauer spectra were FeNNN, Fe(NN), and Fe(NN)2, isolated in argon matrices. Yields of the species changed, depending on the concentration of nitrogen in the matrix. A product assigned to Fe(NN)6 was obtained in a pure nitrogen matrix. Infrared spectra and molecular orbital calculations of the products support these findings.
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Affiliation(s)
- Y Yamada
- Department of Chemistry, Faculty of Science, Science University of Tokyo, Japan.
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Katsumata K, Yamamoto K, Ashizawa T, Sumi T, Murohashi T, Katayanagi S, Kusama M, Koyanagi Y. [Recurrent breast cancer successfully treated with a weekly dose of paclitaxel--a case report]. Gan To Kagaku Ryoho 2001; 28:75-8. [PMID: 11201384] [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: 02/19/2023]
Abstract
The patient was a 46-year-old women who was treated for axillary lymph node recurrence of breast cancer by a variety of methods, including surgery, chemotherapy, and radiotherapy, but who experienced recurrences in the cervical and mediastinal lymph nodes and skin, and developed hydrothorax and ascites. Although the recurrent foci responded to 4 cycles of CAF chemotherapy, there was concern that the foci would become refractory or resistant to chemotherapy. The administration of paclitaxel was therefore initiated. The patient received a dose of paclitaxel once a week for 5 consecutive weeks followed by a 1-week recovery period (one cycle). After two cycles of the paclitaxel treatment, a marked shrinkage of the lymph nodes and complete resolution of the hydrothorax and ascites were observed. Even though the patient exhibited bone marrow suppression and G-CSF was administered twice for neutropenia, there were no adverse effects except mild alopecia, again suggesting the possibility that paclitaxel is effective chemotherapy for recurrent breast cancer.
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Affiliation(s)
- K Katsumata
- Dept. of Surgery, Hachioji Medical Center of Tokyo Medical College
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Katsumata K, Sumi T, Yamashita S, Takahashi S, Mori M, Baba T, Murohashi T, Nagashima K, Ashizawa T, Yamamoto K, Koyanagi Y, Katoh K. The significance of thymidine phosphorylase expression in colorectal cancer. Oncol Rep 2001; 8:127-30. [PMID: 11115583 DOI: 10.3892/or.8.1.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 11/06/2022] Open
Abstract
We measured thymidine phosphorylase activity in colorectal cancer tissue and conducted immunostaining to investigate enzyme expression in the tumor tissue. The results showed a correlation between staining ratio of thymidine phosphorylase and cancer progression as well as a correlation between enzyme activity and staining ratios of cancer cells and stromal cells. Since enzyme activity levels can be judged by staining ratios, this method may be useful for assessing cancer malignancy.
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Affiliation(s)
- K Katsumata
- Department of Gastroenterology, Hatiouji Medical Center, Tokyo Medical University, Hatiouji-shi, Tokyo 193-0998, Japan.
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Katsumata K, Ikeda H, Sato M, Harada H, Wakisaka A, Shibata M, Yoshiki T. Tissue-specific high-level expression of human endogenous retrovirus-R in the human adrenal cortex. Pathobiology 2000; 66:209-15. [PMID: 9732235 DOI: 10.1159/000028025] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In an attempt to clarify the biological nature of a human endogenous retrovirus (HERV), HERV-R, which is a single-copy type of HERVs and is conserved as a full-length viral sequence, the expression of HERV-R mRNA in normal autopsied systemic organs was examined by Northern blot analysis. The expression showed different levels among individuals, with the adrenal glands expressing the highest level of HERV-R among all organs tested, except for the placenta. In various adrenal tumors, HERV-R was expressed at high levels in all cortical adenomas but less so in pheochromocytomas. In situ hybridization revealed the expression of HERV-R to be localized in all layers of the adrenal cortex, but not in the medulla. This high-level expression of HERV-R in the adrenal cortex may possibly relate to differentiation and/or steroid production by adrenocortical cells.
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Affiliation(s)
- K Katsumata
- Department of Pathology, Hokkaido University School of Medicine, Sapporo, Japan
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Katsumata K, Sumi T, Murohashi T, Nagashima K, Uda O, Ashizawa T, Yamamoto K, Koyanagi Y. [Analysis of the salvage synthesis within biosynthesis of nucleic acid route in colon cancer]. Gan To Kagaku Ryoho 2000; 27:1415-20. [PMID: 10969598] [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: 02/17/2023]
Abstract
Orotate phosphoribosyl transferase (OPRT), thymidine phosphorylase (TP), uridine phosphorylase (UP), dihydropyrimidine dehydrogenase (DPD), and thymidylate synthetase (TS) are enzymes which analyze the salvage synthesis within the biosynthesis of the nucleic acid route of colon cancer. These enzymes were measured in carcinoma and normal tissue. OPRT was 0.065 +/- 0.041 nmol/min/mg protein, TP 4.04 +/- 2.81 nmol/min/mg protein, UP 1.79 +/- 1.19 nmol/min/mg protein, DPD 23.8 +/- 12.0 pmol/min/mg protein, and TS 6.1 +/- 4.4 pmol/g tissue in the normal tissue, and OPRT was 0.199 +/- 0.146 nmol/min/mg protein, TP 13.63 +/- 6.04 nmol/min/mg protein, UP 5.84 +/- 2.37 nmol/min/mg protein, DPD 22.0 +/- 13.4 pmol/min/mg protein, TS 16.9 +/- 7.8 pmol/g tissue in the carcinoma. OPRT, TP, and UP in the carcinoma mainly existed about 3.06-3.37 times that in normal tissue and TS at about 2.77 times. No significant difference was seen in DPD. A correlation was found between OPRT in normal tissue and carcinoma. Biosynthesis of nucleic acid via salvage synthesis is actively stimulated. Enzymatic activity related to uracil was high, and was thought to be closely connected to the growth of the cancer.
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Affiliation(s)
- K Katsumata
- Dept. of Gastroenterological Surgery, Hachioji Medical Center, Tokyo Medical University
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35
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Lewis NM, Katsumata K, Atsumi T, Sanchez ML, Romero FI, Bertolaccini ML, Funke A, Amengual O, Khamashta MA, Hughes GR. An evaluation of an angiotensin-converting enzyme gene polymorphism and the risk of arterial thrombosis in patients with the antiphospholipid syndrome. Arthritis Rheum 2000; 43:1655-6. [PMID: 10902773 DOI: 10.1002/1529-0131(200007)43:7<1655::aid-anr32>3.0.co;2-l] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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36
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Yamanaka K, Katsumata K, Ikuma K, Hasegawa A, Nakano M, Okada S. The role of orally administered dimethylarsinic acid, a main metabolite of inorganic arsenics, in the promotion and progression of UVB-induced skin tumorigenesis in hairless mice. Cancer Lett 2000; 152:79-85. [PMID: 10754209 DOI: 10.1016/s0304-3835(99)00440-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.3] [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: 11/21/2022]
Abstract
The effect of dimethylarsinic acid (DMA) on skin tumorigenesis by UVB irradiation was examined. Hairless mice (Hos: HR-1) irradiated with UVB at a dose of 2 kJ/m(2) twice weekly, were fed with drinking water containing 1000 ppm DMA, a main metabolite of inorganic arsenics, produced more skin tumors than DMA-untreated mice. Histopathological examination revealed that the mouse malignant tumors with severe atypism appeared only in the treatment group of UVB plus 1000 ppm DMA. These positive results point out the importance of dimethylated metabolites of inorganic arsenic in the process of skin carcinogenesis.
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Affiliation(s)
- K Yamanaka
- Nihon University College of Pharmacy, 7-7-1 Narashinodai, Funabashi, Chiba, Japan.
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37
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Endo K, Katsumata K, Hirata M, Masaki T, Kubodera N, Nakamura T, Ikeda K, Ogata E. 1,25-dihydroxyvitamin D3 as well as its analogue OCT lower blood calcium through inhibition of bone resorption in hypercalcemic rats with continuous parathyroid hormone-related peptide infusion. J Bone Miner Res 2000; 15:175-81. [PMID: 10646127 DOI: 10.1359/jbmr.2000.15.1.175] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [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: 11/18/2022]
Abstract
The effects of 1,25-dihydroxyvitamin D3 [1,25(OH)2D3] and its analogue 22-oxa-1,25(OH)2D3 (22-oxacalcitriol) (OCT) on calcium and bone metabolism were examined in an animal model of hypercalcemia with continuous infusion of parathyroid hormone-related peptide (PTHrP), to determine whether active vitamin D could counteract the skeletal action of PTHrP in addition to its reported effect in suppressing the production of PTHrP in cancer cells. Parathyroid glands were removed from 8-week-old Sprague-Dawley rats to eliminate the confounding effects of endogenous PTH. Animals were then continuously infused with human PTHrP(1-34) at a constant rate via osmotic minipumps for 2 weeks, and at the same time treated orally or intravenously with OCT or 1,25(OH)2D3 four to nine times during the 2-week period. Under these conditions, OCT and, surprisingly, 1,25(OH)2D3 alleviated hypercalcemia in a dose-dependent manner. 1,25(OH)2D3 and OCT suppressed the urinary excretion of deoxypyridinoline, although they did not affect renal calcium handling, suggesting that the antihypercalcemic effect is attributable to the inhibition of bone resorption. These active vitamin D compounds also counteracted the effects of PTHrP at the proximal renal tubules, as reflected by a decrease in phosphate excretion. Histomorphometric analysis of bone revealed a dose-related decrease in parameters of bone resorption. These results suggest that 1,25(OH)2D3 as well as OCT has the potential to alleviate hypercalcemia, at least in part, through the inhibition of bone resorption in hypercalcemic rats with constant PTHrP levels. We propose that the main function of active vitamin D in high bone-turnover states is to inhibit bone resorption, and this may have important implications for the understanding of the role of active vitamin D in the treatment of metabolic bone diseases, such as osteoporosis.
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Affiliation(s)
- K Endo
- Pharmaceutical Research Laboratory, Chugai Pharmaceutical Co. Ltd., Tokyo, Japan
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Saguchi T, Koizumi K, Inoue S, Kakiuchi H, Abe K, Katsumata K, Ashizawa T, Yamamoto K. [Prediction of the clinical efficacy of hepatic arterial chemotherapy for metastatic hepatic cancer by intraarterial infusion of 99mTc-MIBI]. Kaku Igaku 2000; 37:29-33. [PMID: 10714065] [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] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
SPECT was performed in 11 patients with metastatic hepatic cancer by intraarterial infusion of 99mTc-MIBI before hepatic arterial chemotherapy was started, and the degree of accumulation and clinical efficacy were compared. Early and delayed SPECT images were obtained and various parameters were calculated, including early ratio (ER), delayed ratio (DR), washout rate (WR), and retention index (RI). Judgement of clinical efficacy was made by CT before and after hepatic arterial chemotherapy and was classified as effective, unchanged, and progressive groups. The mean values of ER and DR in the effective group were higher than those in the progressive group. No relationships were noted among the WR and RI values of the groups. The assessment of ER and DR using 99mTc-MIBI intraarterial SPECT is considered to be useful for prediction of the clinical efficacy of hepatic arterial chemotherapy for metastatic hepatic cancer.
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Affiliation(s)
- T Saguchi
- Department of Radiology, Hachioji Medical Center of Tokyo Medical University
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39
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Katsumata K, Yamamoto K, Ashizawa T, Sumi T, Yamashita S, Nagashima K, Murohashi T, Majima T, Mori M, Takahashi S, Koyanagi Y. [Two cases of recurrent gastric cancer for which combination chemotherapy with pirarubicin, cis-platinum and 5-fluorouracil were markedly effective]. Gan To Kagaku Ryoho 2000; 27:113-6. [PMID: 10660742] [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: 02/15/2023]
Abstract
In the treatment of 2 patients with recurrent gastric cancer who showed bone metastasis and lymph node recurrence, we administered 30 mg/body of pirarubicin (THP) on the first day of treatment, and 30 mg/body of cis-platinum (CDDP) and 500 mg/m2 of 5-fluorouracil (5-FU) for 3 days (FP therapy). Marked effects were achieved. Gastric cancer of Borrmann IV type was diagnosed in Case 1, and total gastrectomy was performed. The histological type was poorly differentiated adenocarcinoma, and the histological classification was II. A bone metastasis was found three years after operation. The patient was CR after three courses of treatment, and has survived for 2 years. In Case 2, advanced gastric cancer was treated with neoadjuvant chemotherapy and distal gastrectomy. The histological type was moderately differentiated adenocarcinoma, and the histological classification was IIIa. Obstructive jaundice due to lymph node recurrence developed 6 years after operation. Two courses of treatment were provided after PTCD, and PR was observed. The patient has survived for 3 months. Both patients exhibited mild side effects such as anemia and leukocytopenia, but no serious complications were observed. Although various dosage regimens of FP therapy have been investigated, there has been a certain limit to the response rate achieved by this therapy, and new protocols have been explored. We achieved marked effects in 2 patients by adding THP to FP therapy. These cases are reported here together with some discussion of cases reported in the literature.
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Affiliation(s)
- K Katsumata
- Dept. of Digestive Surgery, Hachioji Medical Center, Tokyo Medical College
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Hirata M, Katsumata K, Masaki T, Koike N, Endo K, Tsunemi K, Ohkawa H, Kurokawa K, Fukagawa M. 22-Oxacalcitriol ameliorates high-turnover bone and marked osteitis fibrosa in rats with slowly progressive nephritis. Kidney Int 1999; 56:2040-7. [PMID: 10594779 DOI: 10.1046/j.1523-1755.1999.00772.x] [Citation(s) in RCA: 31] [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: 11/20/2022]
Abstract
UNLABELLED 22-Oxacalcitriol ameliorates high-turnover bone and marked osteitis fibrosa in rats with slowly progressive nephritis. BACKGROUND 22-Oxacalcitriol (OCT) is a unique vitamin D analogue with less calcemic activity than calcitriol, and it effectively suppresses parathyroid hormone (PTH) secretion in uremic rats. This study was performed to examine the long-term effect of intravenously administered OCT on high-turnover bone disease in model rats of slowly progressive renal failure. METHODS Slowly progressive renal failure rats were made by a single injection of glycopeptide isolated from rat renal cortical tissues. At 250 days, glycopeptide-induced nephritis (GN) rats were divided into three groups with the same levels of serum creatinine and PTH, and they received either OCT (0.03 or 0.15 microg/kg body wt) or vehicle given intravenously three times per week for 15 weeks. RESULTS Renal function of GN rats deteriorated very slowly but progressively, as assessed by the increase of serum creatinine concentration. At sacrifice, serum PTH levels, bone formation markers, bone resorption markers, and fibrosis volume were significantly elevated in vehicle-treated GN rats compared with those of sham-operated rats, suggesting the development of high-turnover bone disease with osteitis fibrosa. In contrast, in the GN-OCT 0.15 microg/kg group, these high PTH levels and high-turnover bone and fibrosis were significantly decreased. Such amelioration of bone abnormalities by OCT was not accompanied by either hypercalcemia or further deterioration of renal function. CONCLUSIONS These data indicate that OCT may be a useful and safe agent not only for the suppression of PTH, but also for the amelioration of osteitis fibrosa and high-turnover bone without causing hypercalcemia in chronic dialysis patients.
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Affiliation(s)
- M Hirata
- Fuji Gotemba Research Laboratory, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
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Katsumata K, Ikeda H, Sato M, Ishizu A, Kawarada Y, Kato H, Wakisaka A, Koike T, Yoshiki T. Cytokine regulation of env gene expression of human endogenous retrovirus-R in human vascular endothelial cells. Clin Immunol 1999; 93:75-80. [PMID: 10497013 DOI: 10.1006/clim.1999.4762] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.8] [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: 11/22/2022]
Abstract
To determine whether human endogenous retroviruses are implicated in the pathogenesis of inflammatory vascular diseases of unknown etiology, we examined mRNA expression of a human endogenous retrovirus, HERV-R, which has a long open reading frame in the env region, in cultured human vascular endothelial and smooth muscle cells stimulated in the presence of various cytokines. mRNA of HERV-R was always evident in these cells but not in fibroblastic cells. Levels of expression in vascular endothelial cells were significantly regulated by treatment with tumor necrosis factor-alpha, interleukin (IL)-1alpha, and IL-1beta as up-regulators and interferon-gamma as a down-regulator. These observations are interpreted to mean that HERV-R expression may be up- or down-regulated at sites of inflammation in vessels in vivo and hence may play a pathogenetic role in inflammatory vascular diseases in humans, perhaps similar to endogenous retroviruses in mouse models of polyarteritis nodosa in humans.
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Affiliation(s)
- K Katsumata
- School of Medicine, Hokkaido University, Kita-15, Nishi-7, Kita-ku, Sapporo, 060-8638, Japan
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Abstract
Both genetic and environmental factors have been shown to contribute to the determination of bone density. To clarify the interaction between genetic and environmental factors affecting peak bone mass, we investigated the correlation between bone mineral density (BMD) and physical constitution, vitamin D receptor (VDR) genotype, age, age of menarche, history of menstrual dysfunction, and exercise in 157 healthy young Japanese women. History of exercise and menstrual dysfunction were significant independent predictors of BMD. The VDR genotype also affects peak bone density. Exercise has been shown to increase BMD in a similar way for each VDR genotype including those women who have the particular genotype associated with low bone density. This data indicate that there are complex gene-environmental interactions particularly in relation to menstrual history, exercise, and genetic factors during childhood/adolescence that may have implications for the development of adult BMD in women.
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Affiliation(s)
- Y Fujita
- Department of Pediatrics, Juntendo University School of Medicine, 3-1-3, Hongo, Bunkyo-ku, Tokyo 113, Japan
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Murano A, Katsumata K, Yamamoto K, Kitamura K, Mori Y, Misaka T, Murohashi T, Yamashita S, Sumi T, Ashizawa T, Aoki T, Koyanagi Y, Hirota T. [Preoperative intra-arterial and venous neoadjuvant chemotherapy for advanced gastric cancer]. Gan To Kagaku Ryoho 1998; 25:1977-9. [PMID: 9797824] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- A Murano
- Dept. of Gastro-Intestinal Surgery, Hachiouji Medical Center of Tokyo Medical College
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Endo K, Katsumata K, Iguchi H, Kubodera N, Teramoto T, Ikeda K, Fujita T, Ogata E. Effect of combination treatment with a vitamin D analog (OCT) and a bisphosphonate (AHPrBP) in a nude mouse model of cancer-associated hypercalcemia. J Bone Miner Res 1998; 13:1378-83. [PMID: 9738509 DOI: 10.1359/jbmr.1998.13.9.1378] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [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: 11/18/2022]
Abstract
Hypercalcemia represents one of the important paraneoplastic syndromes affecting morbidity and mortality of cancer patients. We and others have demonstrated that vitamin D analogs with little calcemic activities suppress the transcription of the parathyroid hormone-related peptide (PTHrP) gene, a major humor responsible for cancer hypercalcemia, and thereby prevent the development of hypercalcemic syndrome. The present study was undertaken: to compare the therapeutic efficacy of a vitamin D analog, 22-oxa-1,25-dihydroxyvitamin D3 (OCT), and a bisphosphonate (disodium 3-amino-1-hydroxypropylidene-1,1-bisphosphonate pentahydrate [AHPrBP]), an inhibitor of osteoclastic bone resorption, on cancer-induced hypercalcemia; and to see if the effect could be enhanced by combination treatment, using a nude mouse model implanted with a human pancreas carcinoma (FA-6). After a single intravenous administration, OCT (5 microg/kg of body weight [BW]) was as effective as AHPrBP (10 mg/kg of BW) in lowering blood ionized calcium levels in tumor-bearing nude mice, and their combination further enhanced the therapeutic effect. Although AHPrBP lost its efficacy after repeated injections, OCT was still effective after the third administration. The therapeutic effect of OCT in cancer hypercalcemia was observed in four other human tumors, including another pancreas carcinoma (PAN-7), two squamous cell carcinomas of the lung (KCC-C1 and LC-6), and a squamous carcinoma of the pharynx (PHA-1), all of which elaborated PTHrP into the circulation. Treatment with OCT resulted in a decrease in circulating PTHrP levels by approximately 50% in two representative models. However, the mechanism underlying the antihypercalcemic effect of OCT seemed complex, involving inhibition of PTHrP production, suppression of excessive bone resorption, and an antitumor activity. OCT also markedly inhibited the body weight loss with tumor growth, while AHPrBP, which exhibited a similar antihypercalcemic effect, was less effective than OCT in preventing cachexia. The anticachectic activity of their combination did not exceed that of OCT alone, suggesting a hypercalcemia-dependent as well as an independent mechanism of cancer cachexia. It is concluded that OCT may be useful, either as a single agent or in combination with bisphosphonates, for the treatment of cancer-associated hypercalcemia and cachexia.
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Affiliation(s)
- K Endo
- Pharmaceutical Research Laboratory, Chugai Pharmaceutical Co., Ltd., Shizuoka, Japan
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Katsumata K, Miyao M, Katsumata Y. Insulin potentiating effect on development of alloxan diabetes and its prevention by the Ca-channel blocker nicardipine. Horm Metab Res 1998; 30:557-8. [PMID: 9808323 DOI: 10.1055/s-2007-978932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Katsumata K, Yamamoto K, Shibata K, Murano A, Kawasaki M, Moriwaki R, Nagakawa Y, Ogata T, Koyanagi Y, Kusama M. [Efficacy of combination chemotherapy with mitoxantrone, vincristine, doxifluridine and prednisolone for recurrence of breast cancer]. Gan To Kagaku Ryoho 1997; 24:2227-32. [PMID: 9422066] [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: 02/05/2023]
Abstract
We treated fifteen patients with recurrent breast cancer by a combination of mitoxantrone (8 mg/m i.v., day 1), vincristine (1.2 mg/m i.v., day 1), doxifluridine (800 mg/body po, everyday) and prednisolone (30 mg/body po, day 1-7). Cycles were repeated every 3 weeks and all patients received more than 2 cycles. A response to treatment was observed in 9 of 15 evaluable patients (60.0%) with 4 complete remissions and 5 partial remissions. Eight patients were previously exposed to anthracyclines. In 5 of 7 cases with no previous chemotherapy, treatment was effective, and in 4 of 8 cases previous chemotherapy was effective. The toxicity was primarily leucopenia (86.7%), and 9 patients received G-CSF therapy. Other toxicities (alopecia, neurologic and general fatigue) were mild. Two patients with heart failure were recognized and treated with other therapy. This chemotherapy is effective for the treatment of recurrent breast cancer.
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Affiliation(s)
- K Katsumata
- Dept. of Surgery, Hachioji Medical Center of Tokyo Medical College
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48
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Katsumata K. [Tissue-specific expression of human endogenous retrovirus mRNA and its regulation by cytokines in vitro]. Hokkaido Igaku Zasshi 1997; 72:635-48. [PMID: 9465316] [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] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
To investigate biological roles of human endogenous retroviruses (ERVs), the author examined the viral mRNA expression in the normal systemic organs in vivo and its regulation by cytokines in cultured cells. The following evidence suggesting biological activities of a human ERV, ERV3, was obtained. First, the ERV3 mRNA was demonstrated at different levels in organs, and at consistently high levels in adrenal glands from all individuals and in all adrenocortical adenomas examined, by Northern hybridization. In situ hybridization revealed that the ERV3 expression was localized in all three layers of the adrenal cortex, but not in the medulla. These results suggest that the ERV3 expression may relate to the cellular differentiation and/or steroid production of adrenocortical cells. Second, the amount of ERV3 mRNA in cultured endothelial cells from human umbilical vein was significantly increased with any of TNF-alpha, IL-1 beta or IL-1 alpha stimulation but decreased with IFN-gamma treatment, by a quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) with competitive PCR. The collective evidence suggests that the ERV3 expression may be upregulated at the inflammatory sites of vessels in vivo, and that the ERV3 expression may, therefore, play certain pathogenic roles in diseases, including collagen and vascular diseases in man.
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Affiliation(s)
- K Katsumata
- First Department of Pathology, Hokkaido University School of Medicine, Sapporo, Japan
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Katsumata K. [Diabetes mellitus and sleep apnea syndrome]. Nihon Rinsho 1997; 55 Suppl:1006-10. [PMID: 9392233] [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: 02/05/2023]
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50
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Ozawa T, Hayakawa M, Katsumata K, Yoneda M, Ikebe S, Mizuno Y. Fragile mitochondrial DNA: the missing link in the apoptotic neuronal cell death in Parkinson's disease. Biochem Biophys Res Commun 1997; 235:158-61. [PMID: 9196054 DOI: 10.1006/bbrc.1997.6754] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [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: 02/04/2023]
Abstract
The oxidative stress theory, the mitochondrial (mt) hypothesis, and the apoptosis hypothesis are proposed as the cause of neuronal cell death in Parkinson's disease (PD). However, the direct link between them has remained unknown. Recently, the mt control of nuclear apoptosis is documented that collapse of mt transmembrane potential due to energy crisis leads to release of apoptotic protease activating-factors into cytosol and subsequently nuclear DNA fragmentation. However, an endogenous factor responsible for the energy crisis under physiological conditions is missing. Here we report the missing factor as that mtDNA in the striatum of a parkinsonian patient fragments into 134 types of deleted pieces, being detected by the total detection system for mtDNA deletion. The system has documented that the mtDNA is extremely susceptible to hydroxyl radical damage, hence to oxidative stress, enough to cause the cellular energy crisis. The extensive fragility of mtDNA in brain stem could link the oxidative stress up with the apoptotic neuronal cell-death of PD.
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Affiliation(s)
- T Ozawa
- Department of Biomedical Chemistry, Faculty of Medicine, University of Nagoya, Japan
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