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Akira O, Morita S, Iwamoto S, Hara H, Tanioka H, Satake H, Kataoka M, Tsuji A, Ando M, Sakamoto J, Yamaguchi K. P-4 The relationship between quality of life, adverse events, and treatment efficacy in treatment with first-line chemotherapy plus cetuximab for unresectable metastatic colorectal cancer: Results of phase II QUACK trial. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.086] [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: 11/25/2022] Open
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Yoshida S, Iwamoto S, Fueta Y, Ueno S, Sekino Y, Nomura Y, Kanda Y. The malformation of Purkinje cells becomes the sensing tool for developmental neurotoxicity; its potential and limitation. Toxicol Lett 2018. [DOI: 10.1016/j.toxlet.2018.06.053] [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: 10/28/2022]
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Uchiyama H, Oshima Y, Patterson R, Iwamoto S, Shiomi J, Shimamura K. Phonon Lifetime Observation in Epitaxial ScN Film with Inelastic X-Ray Scattering Spectroscopy. Phys Rev Lett 2018; 120:235901. [PMID: 29932681 DOI: 10.1103/physrevlett.120.235901] [Citation(s) in RCA: 2] [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: 12/18/2017] [Revised: 03/21/2018] [Indexed: 06/08/2023]
Abstract
Phonon-phonon scattering dominates the thermal properties in nonmetallic materials, and it directly influences device performance in applications. The understanding of the scattering has been progressing using computational approaches, and the direct and systematic observation of phonon modes that include momentum dependences is desirable. We report experimental data on the phonon dispersion curves and lifetimes in an epitaxially grown ScN film using inelastic x-ray scattering measurements. The momentum dependence of the optical phonon lifetimes is estimated from the spectral width, and the highest-energy phonon mode around the zone center is found to possess a short lifetime of 0.21 ps. A comparison with first-principles calculations shows that our observed phonon lifetimes are quantitatively explained by three-body phonon-phonon interactions.
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Affiliation(s)
- H Uchiyama
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Koto, Sayo, Hyogo 679-5198, Japan
| | - Y Oshima
- Optical Single Crystals Group, Environment and Energy Materials Research Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - R Patterson
- School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney 2052, Australia
| | - S Iwamoto
- Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
| | - J Shiomi
- Department of Mechanical Engineering, The University of Tokyo, Bunkyo, Tokyo 113-8656, Japan
| | - K Shimamura
- Optical Single Crystals Group, Environment and Energy Materials Research Division, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Kinoshita M, Takechi K, Nagao Y, Izumi S, Arai Y, Shirono R, Iwamoto S, Takao S, Noda S, Ueno J, Harada M. Abstract No. 694 The impact of virtual liver parenchymal perfusion using existing 3-dimensional workstation and simulation software in conventional transcatheter arterial chemoembolization for hepatocellular carcinoma. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.739] [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] Open
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Fukuda H, Uchida Y, Song J, Onishi T, Yamaji N, Iwamoto S, Notani M, Yoshikawa H, Abe K. Importance of dementia exercise with activities of the intensive comprehensive community care course in rural community dwellers. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.927] [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: 10/18/2022]
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Bando H, Kato T, Yoshino T, Muro K, Yamazaki K, Yamaguchi T, Oki E, Iwamoto S, Tsuji A, Nakayama G, Emi Y, Touyama T, Nakamura M, Kotaka M, Kagawa Y, Taniguchi H, Sakisaka H, Yamanaka T, Kanazawa A. Primary efficacy results and clinical impact of UGT1A1 genotype on safety from a Phase II study of FOLFOXIRI plus bevacizumab in patients with metastatic colorectal cancer: The QUATTRO study. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx393.105] [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: 11/13/2022] Open
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Isogai Y, Yokose T, Maeda T, Akiyama M, Onogi S, Masuda T, Iwamoto S, Ohmachi T. A new device, op-rheometbr system for analysis of viscosity and viscoelasticity of blood and clinical application. Clin Hemorheol Microcirc 2016. [DOI: 10.3233/ch-1984-42-318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Y. Isogai
- 3rd Department of Medicine, Jikei University School of Medicine, Minato-ku, Tokyo 105
| | - T. Yokose
- 3rd Department of Medicine, Jikei University School of Medicine, Minato-ku, Tokyo 105
| | - T. Maeda
- 3rd Department of Medicine, Jikei University School of Medicine, Minato-ku, Tokyo 105
| | - M. Akiyama
- 3rd Department of Medicine, Jikei University School of Medicine, Minato-ku, Tokyo 105
| | - S. Onogi
- Dept. of Polymer Chemistry, Kyoto University, Kyoto
| | - T. Masuda
- Dept. of Polymer Chemistry, Kyoto University, Kyoto
| | - S. Iwamoto
- Iwamoto Seisakusyo, Co., Ltd. Kyoto, Japan
| | - T. Ohmachi
- Iwamoto Seisakusyo, Co., Ltd. Kyoto, Japan
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Iwamoto S, Hazama S, Kin H, Takemoto H, Kobayashi K, Takahashi Y, Kobayashi M, Maeda H, Nagata N, Oba K, Sakamoto J, Mishima H. P-157 A phase II study of XELOX and Cetuximab (Erbitux) as first-line therapy in patients with KRAS wild-type metastatic colorectal cancer (FLEET2). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.151] [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: 11/13/2022] Open
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Inada R, Murotani K, Iwamoto S, Kaibori M, Ishizaki M, Iida H, Matsui K, Oishi M, Mastumoto T, Michiura T, Inoue K, Mishima H, Kon M, Hamada M. P-062 Correlation of histological Tumor Regression Grading (TRG) with radiological response and long-term outcome after preoperative chemotherapy for Colorectal Liver Metastases: a propensity score matching analysis. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw199.60] [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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Hamada M, Inada R, Oishi M, Maruyama F, Matsumoto T, Miki H, Iwamoto S. P-342 Standardized Technique of Laparoscopic Extralevator Abdominoperineal Excision (LAP-ELAPE). Ann Oncol 2015. [DOI: 10.1093/annonc/mdv233.336] [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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Iwamoto S, Takahashi T, Tamagawa H, Nakamura M, Munemoto Y, Kato T, Hata T, Denda T, Morita Y, Inukai M, Kunieda K, Nagata N, Kurachi K, Ina K, Ooshiro M, Shimoyama T, Baba H, Oba K, Sakamoto J, Mishima H. FOLFIRI plus bevacizumab as second-line therapy in patients with metastatic colorectal cancer after first-line bevacizumab plus oxaliplatin-based therapy: the randomized phase III EAGLE study. Ann Oncol 2015; 26:1427-33. [PMID: 25908603 PMCID: PMC4478977 DOI: 10.1093/annonc/mdv197] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [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: 02/18/2015] [Accepted: 04/15/2015] [Indexed: 11/13/2022] Open
Abstract
EAGLE was a randomized, multicenter phase III study which evaluated the superiority of bevacizumab 10 mg/kg plus FOLFIRI compared with bevacizumab 5 mg/kg plus FOLFIRI in patients with mCRC previously treated with first-line bevacizumab plus an oxaliplatin-based regimen. The results suggest that the higher 10 mg/kg dose offers no clear clinical benefit compared with bevacizumab 5 mg/kg in this setting. Background A targeted agent combined with chemotherapy is the standard treatment in patients with metastatic colorectal cancer (mCRC). The present phase III study was conducted to compare two doses of bevacizumab combined with irinotecan, 5-fluorouracil/leucovorin (FOLFIRI) in the second-line setting after first-line therapy with bevacizumab plus oxaliplatin-based therapy. Patients and methods Patients were randomly assigned to receive FOLFIRI plus bevacizumab 5 or 10 mg/kg in 2-week cycles until disease progression. The primary end point was progression-free survival (PFS), and secondary end points included overall survival (OS), time to treatment failure (TTF), and safety. Results Three hundred and eighty-seven patients were randomized between September 2009 and January 2012 from 100 institutions in Japan. Baseline patient characteristics were well balanced between the two groups. Efficacy was evaluated in 369 patients (5 mg/kg, n = 181 and 10 mg/kg, n = 188). Safety was evaluated in 365 patients (5 mg/kg, n = 180 and 10 mg/kg, n = 185). The median PFS was 6.1 versus 6.4 months (hazard ratio, 0.95; 95% confidence interval [CI] 0.75–1.21; P = 0.676), and median TTF was 5.2 versus 5.2 months (hazard ratio, 1.01; 95% CI 0.81–1.25; P = 0.967), respectively, for the bevacizumab 5 and 10 mg/kg groups. Follow-up of OS is currently ongoing. Adverse events, including hypertension and hemorrhage, occurred at similar rates in both groups. Conclusion Bevacizumab 10 mg/kg plus FOLFIRI as the second-line treatment did not prolong PFS compared with bevacizumab 5 mg/kg plus FOLFIRI in patients with mCRC. If bevacizumab is continued after first-line therapy in mCRC, a dose of 5 mg/kg is appropriate for use as second-line treatment. Clinical trial identifier UMIN000002557.
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Affiliation(s)
- S Iwamoto
- Department of Surgery, Kansai Medical University Hirakata Hospital, Hirakata
| | - T Takahashi
- Department of Surgical Oncology, Gifu University Graduate School of Medicine, Gifu
| | - H Tamagawa
- Department of Gastroenterological Surgery, Osaka General Medical Center, Osaka
| | - M Nakamura
- Aizawa Comprehensive Cancer Center, Aizawa Hospital, Matsumoto
| | - Y Munemoto
- Department of Surgery, Fukuiken Saiseikai Hospital, Fukui
| | - T Kato
- Department of Surgery, Kansai Rosai Hospital, Amagasaki
| | - T Hata
- Department of Surgery, Osaka University, Suita
| | - T Denda
- Department of Gastroenterology, Chiba Cancer Center, Chiba
| | - Y Morita
- Department of Radiology, Kobe Medical Center, Kobe
| | - M Inukai
- Department of Integrated Medicine, Kagawa University, Kita
| | - K Kunieda
- Department of Surgery, Gifu Prefectural General Medical Center, Gifu
| | - N Nagata
- Department of Surgery, Kitakyushu General Hospital, Kitakyusyu
| | - K Kurachi
- Second Department of Surgery, Hamamatsu University School of Medicine, Shizuoka
| | - K Ina
- Department of Medical Oncology, Nagoya Memorial Hospital, Nagoya
| | - M Ooshiro
- Department of Surgery, Toho University Medical Center Sakura Hospital, Sakura
| | - T Shimoyama
- Department of Chemotherapy, Tokyo Metropolitan Cancer and Infectious Diseases Center, Komagome Hospital, Tokyo
| | - H Baba
- Department of Gastroenterological Surgery, Kumamoto University, Kumamoto
| | - K Oba
- Department of Biostatistics, School of Public Health, Graduate School of Medicine and Interfaculty Initiative in Information Studies, The University of Tokyo, Tokyo
| | | | - H Mishima
- Cancer Center, Aichi Medical University, Nagakute, Japan
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Miura R, Imamura S, Ohta R, Ishii A, Liu X, Shimada T, Iwamoto S, Arakawa Y, Kato YK. Ultralow mode-volume photonic crystal nanobeam cavities for high-efficiency coupling to individual carbon nanotube emitters. Nat Commun 2014; 5:5580. [PMID: 25420679 PMCID: PMC4263150 DOI: 10.1038/ncomms6580] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [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] [Received: 05/09/2014] [Accepted: 10/16/2014] [Indexed: 11/09/2022] Open
Abstract
The unique emission properties of single-walled carbon nanotubes are attractive for achieving increased functionality in integrated photonics. In addition to being room-temperature telecom-band emitters that can be directly grown on silicon, they are ideal for coupling to nanoscale photonic structures. Here we report on high-efficiency coupling of individual air-suspended carbon nanotubes to silicon photonic crystal nanobeam cavities. Photoluminescence images of dielectric- and air-mode cavities reflect their distinctly different mode profiles and show that fields in the air are important for coupling. We find that the air-mode cavities couple more efficiently, and estimated spontaneous emission coupling factors reach a value as high as 0.85. Our results demonstrate advantages of ultralow mode-volumes in air-mode cavities for coupling to low-dimensional nanoscale emitters.
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Affiliation(s)
- R Miura
- Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
| | - S Imamura
- Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
| | - R Ohta
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - A Ishii
- Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
| | - X Liu
- Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
| | - T Shimada
- Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
| | - S Iwamoto
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - Y Arakawa
- Institute of Industrial Science, The University of Tokyo, Tokyo 153-8505, Japan
| | - Y K Kato
- Institute of Engineering Innovation, The University of Tokyo, Tokyo 113-8656, Japan
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Kataoka K, Kanazawa A, Iwamoto S, Kato T, Nakajima A, Arimoto A. Does "conversion chemotherapy" really improve survival in metastatic colorectal cancer patients with liver-limited disease? World J Surg 2014; 38:936-46. [PMID: 24166026 DOI: 10.1007/s00268-013-2305-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND The clinical benefits of conversion chemotherapy followed by liver resection for initially unresectable colorectal liver metastases are still controversial. The criteria for unresectability vary from one team to another. To clarify this issue, we retrospectively assessed the survival and characteristics of metastatic colorectal cancer (mCRC) patients with liver-limited disease (LLD) who underwent conversion therapy. METHOD Our criteria for resectability depended on the size of the remnant liver volume (>30 %) and expected function after removal of all metastases. Between December 2007 and September 2011, a total of 115 patients were diagnosed as having mCRC with LLD and received chemotherapy. Among them, 47 had tumors that were initially diagnosed as resectable. They underwent hepatic resection after chemotherapy (resected group). Of the 67 tumors were initially diagnosed as unresectable, 12 became resectable after chemotherapy (conversion group), leaving 55 tumors that remained unresectable after chemotherapy (unresected group). RESULTS The median follow-up was 25.2 months. Hepatic resection was more invasive in the conversion group than in the resected group. Median disease-free survival was significantly higher in the resected group than in the conversion group (p = 0.013). Overall survival (OS) was also higher in the resected group, but the difference was not significant (p = 0.36). However, OS was significantly higher in the conversion group than in the unresected group (p = 0.034). Multivariate analysis of the resected and conversion groups showed that OS was significantly negatively influenced by abnormal carcinoembryonic antigen levels at surgery (p = 0.037) and a hospital stay >30 days (p = 0.009). CONCLUSIONS Our results showed that conversion chemotherapy could contribute to longer OS in mCRC patients with LLD.
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Affiliation(s)
- K Kataoka
- Department of Surgery, Osaka Red Cross Hospital, 5-30 Fudegasaki, Tennoji, Osaka, 543-8555, Japan,
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Munemoto Y, Iwamoto S, Takahashi T, Tamagawa H, Nakamura M, Kato T, Hata T, Denda T, Morita Y, Inukai M, Kunieda K, Nagata N, Kurachi K, Ina K, Oshiro M, Shimoyama T, Baba H, Oba K, Sakamoto J, Mishima H. A Phase III Study of Eagle Comparing Two Doses of Bevacizumab Combined with Folfiri in the Second-Line Setting After First-Line Treatment with Bevacizumab Plus Oxaliplatin-Based Therapy : Kras Subgroup Findings. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu333.28] [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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Abu-Zayyad T, Aida R, Allen M, Anderson R, Azuma R, Barcikowski E, Belz JW, Bergman DR, Blake SA, Cady R, Cheon BG, Chiba J, Chikawa M, Cho EJ, Cho WR, Fujii H, Fujii T, Fukuda T, Fukushima M, Gorbunov D, Hanlon W, Hayashi K, Hayashi Y, Hayashida N, Hibino K, Hiyama K, Honda K, Iguchi T, Ikeda D, Ikuta K, Inoue N, Ishii T, Ishimori R, Ivanov D, Iwamoto S, Jui CCH, Kadota K, Kakimoto F, Kalashev O, Kanbe T, Kasahara K, Kawai H, Kawakami S, Kawana S, Kido E, Kim HB, Kim HK, Kim JH, Kim JH, Kitamoto K, Kitamura S, Kitamura Y, Kobayashi K, Kobayashi Y, Kondo Y, Kuramoto K, Kuzmin V, Kwon YJ, Lan J, Lim SI, Machida S, Martens K, Matsuda T, Matsuura T, Matsuyama T, Matthews JN, Minamino M, Miyata K, Murano Y, Myers I, Nagasawa K, Nagataki S, Nakamura T, Nam SW, Nonaka T, Ogio S, Ohnishi M, Ohoka H, Oki K, Oku D, Okuda T, Oshima A, Ozawa S, Park IH, Pshirkov MS, Rodriguez DC, Roh SY, Rubtsov GI, Ryu D, Sagawa H, Sakurai N, Sampson AL, Scott LM, Shah PD, Shibata F, Shibata T, Shimodaira H, Shin BK, Shin JI, Shirahama T, Smith JD, Sokolsky P, Stokes BT, Stratton SR, Stroman T, Suzuki S, Takahashi Y, Takeda M, Taketa A, Takita M, Tameda Y, Tanaka H, Tanaka K, Tanaka M, Thomas SB, Thomson GB, Tinyakov P, Tkachev I, Tokuno H, Tomida T, Troitsky S, Tsunesada Y, Tsutsumi K, Tsuyuguchi Y, Uchihori Y, Udo S, Ukai H, Vasiloff G, Wada Y, Wong T, Wood M, Yamakawa Y, Yamane R, Yamaoka H, Yamazaki K, Yang J, Yoneda Y, Yoshida S, Yoshii H, Zhou X, Zollinger R, Zundel Z. Upper limit on the flux of photons with energies above1019 eVusing the Telescope Array surface detector. Int J Clin Exp Med 2013. [DOI: 10.1103/physrevd.88.112005] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Takahashi S, Tandaechanurat A, Igusa R, Ota Y, Tatebayashi J, Iwamoto S, Arakawa Y. Giant optical rotation in a three-dimensional semiconductor chiral photonic crystal. Opt Express 2013; 21:29905-29913. [PMID: 24514541 DOI: 10.1364/oe.21.029905] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Optical rotation is experimentally demonstrated in a semiconductor-based three-dimensional chiral photonic crystal (PhC) at a telecommunication wavelength. We design a rotationally-stacked woodpile PhC structure, where neighboring layers are rotated by 45° and four layers construct a single helical unit. The mirror-asymmetric PhC made from GaAs with sub-micron periodicity is fabricated by a micro-manipulation technique. The linearly polarized light incident on the structure undergoes optical rotation during transmission. The obtained results show good agreement with numerical simulations. The measurement demonstrates the largest optical rotation angle as large as ∼ 23° at 1.3 μm wavelength for a single helical unit.
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Iwamoto S, Azuma E, Kumamoto T, Hirayama M, Yoshida T, Ito M, Amano K, Ido M, Komada Y. Efficacy of azithromycin in preventing lethal graft-versus-host disease. Clin Exp Immunol 2013; 171:338-45. [PMID: 23379441 DOI: 10.1111/cei.12023] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2012] [Indexed: 12/27/2022] Open
Abstract
Acute graft-versus-host disease (GVHD) following allogeneic bone marrow transplantation (BMT) is initiated by donor T lymphocytes that recognize histocompatibility antigens presented by recipient dendritic cells (DCs). Current approaches to reduce GVHD are focused on suppressing donor T lymphocyte responses to alloantigens. However, these strategies may be inadequate in the setting of allogeneic transplants (particularly histoincompatible transplants), may increase the risk of tumour relapse and are associated with high rates of opportunistic infections. We hypothesized that inhibition of recipient DCs might suppress GVHD. We recently demonstrated in vitro that azithromycin, a macrolide antibiotic, also acts as a nuclear factor (NF)-κB inhibitor of murine DCs and inhibits their maturation and functions, including allogeneic responses. We investigated whether azithromycin could prevent alloreactions in a murine histoincompatibility model. Oral administration of azithromycin to recipient mice for 5 days during major-histoincompatible BMT suppressed lethal GVHD significantly, whereas ex-vivo lymphocyte function was not affected by the drug. These data suggest that azithromycin has potential as a novel prophylactic drug for lethal GVHD.
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Affiliation(s)
- S Iwamoto
- Department of Pediatrics and Cell Transplantation, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Iwamoto S, Isoyama M, Hirano M, Yamaya K, Ito Y, Matsuo I, Totani K. Reconstructed glycan profile for evaluation of operating status of the endoplasmic reticulum glycoprotein quality control. Glycobiology 2012; 23:121-31. [DOI: 10.1093/glycob/cws130] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Iwamoto S, Kumamoto T, Azuma E, Hirayama M, Ito M, Amano K, Ido M, Komada Y. The effect of azithromycin on the maturation and function of murine bone marrow-derived dendritic cells. Clin Exp Immunol 2012; 166:385-92. [PMID: 22059997 DOI: 10.1111/j.1365-2249.2011.04480.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Dendritic cells (DCs) are professional antigen-presenting cells capable of initiating primary/adaptive immune responses and tolerance. DC functions are regulated by their state of maturation. However, the molecular pathways leading to DC development and maturation remain poorly understood. We attempted to determine whether inhibition of nuclear factor kappa B (NF-κB), which is one of the pivotal pathways underlying these processes, could induce immunophenotypic and functional changes in lipopolysaccharide-induced mature DCs derived from murine bone marrow. A comparative in vitro study of five clinically used drugs that are known to inhibit NF-κB demonstrated that azithromycin, a macrolide antibiotic, significantly inhibited expression of co-stimulatory molecules (CD40 and CD86) and major histocompatibility complex (MHC) class II by DCs. It also reduced Toll-like receptor 4 expression, interleukin-12 production and the allostimulatory capacity of DCs. These data suggest that azithromycin, as not only an NF-κB inhibitor but also an antibiotic, has potential as a novel drug for manipulation of allogeneic responses.
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Affiliation(s)
- S Iwamoto
- Department of Pediatrics and Cell Transplantation, Mie University Graduate School of Medicine, Tsu, Mie, Japan
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Minobe K, Ono R, Matsumine A, Shibata-Minoshima F, Izawa K, Oki T, Kitaura J, Iino T, Takita J, Iwamoto S, Hori H, Komada Y, Uchida A, Hayashi Y, Kitamura T, Nosaka T. Expression of ADAMTS4 in Ewing's sarcoma. Int J Oncol 2010; 37:569-81. [PMID: 20664926 DOI: 10.3892/ijo_00000706] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Ewing's sarcoma (EWS) is a malignant bone tumor that frequently occurs in teenagers. Genetic mutations which cause EWS have been investigated, and the most frequent one proved to be a fusion gene between EWS gene of chromosome 22 and the FLI1 gene of chromosome 11. However, a limited numbers of useful biological markers for diagnosis of EWS are available. In this study, we identified ADAMTS4 (a disintegrin and metalloproteinase with thrombospondin motifs) as a possible tumor marker for EWS using the retrovirus-mediated signal sequence trap method. ADAMTS4 is a secreted protein of 837 amino acids with a predicted molecular mass of 98-100 kDa. It is a member of metalloprotease family, is expressed mainly in cartilage and brain, and regulates the degradation of aggrecans. ADAMTS4 has been suggested to be involved in arthritic diseases and gliomas. Herein, we show that ADAMTS4 mRNA was expressed in all primary EWS samples and all EWS-derived cell lines examined, while its expression was detected only in small subpopulations of other solid tumors. Furthermore, ADAMTS4 expression was found to be regulated by EWS-FLI1 fusion gene-dependent manner. We also demonstrated that ADAMTS4 protein was highly expressed in tumor samples of the patients with EWS by using immunohistochemistry. These results suggest that ADAMTS4 is a novel tumor marker for EWS.
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Affiliation(s)
- K Minobe
- Department of Microbiology and Molecular Genetics, Mie University Graduate School of Medicine, Tsu, Japan
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Kumagai N, Ohkouchi S, Shirane M, Igarashi Y, Nomura M, Ota Y, Yorozu S, Iwamoto S, Arakawa Y. Neutralization of positively charged excitonic state in single InAs quantum dot by Si delta doping. ACTA ACUST UNITED AC 2010. [DOI: 10.1088/1742-6596/245/1/012088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [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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22
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Tanaka Y, Ohishi K, Yonekawa T, Yodoya N, Iwamoto S, Nishioka Y, Tatara Y, Matsumoto T, Masuya M. Effect of washing solution on platelet counts following transfusion with twice-washed platelets: a single-patient experience. Transfus Med 2010; 20:358-60. [DOI: 10.1111/j.1365-3148.2010.01010.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Iwamoto S, Uehara Y, Akamatsu H, Sima M, Kakudo K, Morita S. A case report of trigeminal neuralgia caused by cerebellopontine angle epidermoid cyst diagnosed by magnetic resonance imaging. Int J Oral Maxillofac Surg 2009. [DOI: 10.1016/j.ijom.2009.03.602] [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: 11/17/2022]
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24
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Nakayama K, Bayasgalan T, Yamanaka K, Kumada M, Gotoh T, Utsumi N, Yanagisawa Y, Okayama M, Kajii E, Ishibashi S, Iwamoto S. Large scale replication analysis of loci associated with lipid concentrations in a Japanese population. J Med Genet 2009; 46:370-4. [PMID: 19487539 DOI: 10.1136/jmg.2008.064063] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Recent genome wide association studies discovered seven novel loci that influence plasma concentrations of triglycerides, high density lipoprotein (HDL) and low density lipoprotein (LDL) cholesterol in Europeans. To date, large scale replication studies using populations with known differences in genome-wide linkage disequilibrium (LD) pattern have not been undertaken. METHODS To address this issue, we tested associations between single nucleotide polymorphisms (SNPs) within the seven novel loci and plasma lipid profiles in 21 010 Japanese individuals. RESULTS Multiple linear regression analyses showed that the rs3812316 in MLXIPL was strongly associated with triglyceride concentrations (p approximately 3.0x10(-11), 7.1 mg/dl decrease per minor C allele) and that rs599839 in CELSR2/PSRC1/SORT1 was strongly associated with LDL cholesterol concentrations (p approximately 3.1x10(-11), 4.7 mg/dl decrease per minor G allele) in the Japanese population. SNPs near ANGPTL3, TRIB1 and GALNT2 showed evidence for associations with triglyceride concentrations (3.6x10(-6)<p<5.1x10(-5)). SNP near TRIB1 showed association with LDL cholesterol concentrations (p approximately 1.2x10(-5)). On the other hand, SNPs in NCAN/CILP2/PBX4 and MVK/MMAB were not associated with any plasma lipid profiles in the Japanese population. Ethnic differences in LD pattern would explain the lack of association between these two loci and plasma lipid concentrations in the Japanese population. CONCLUSION Associations between the novel loci and plasma lipid concentrations were generally conserved in the Japanese population, with the exception of NCAN/CILP2/PBX4 and MVK/MMAB.
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Affiliation(s)
- K Nakayama
- Division of Human Genetics, Center for Community Medicine, Jichi Medical University, 3311-1 Yakushiji, Shimotsuke-city, Tochigi, 329-0498 Japan.
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Wakayama Y, Tandaechanurat A, Iwamoto S, Arakawa Y. Design of high-Q photonic crystal microcavities with a graded square lattice for application to quantum cascade lasers. Opt Express 2008; 16:21321-21332. [PMID: 19104562 DOI: 10.1364/oe.16.021321] [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] [Indexed: 05/27/2023]
Abstract
A high-Q photonic crystal (PC) microcavity for TM-like modes, which can be applied to quantum cascade lasers (QCLs), was successfully designed in an air-hole based PC slab with semiconductor cladding layers. In spite of no photonic badgaps for TM-like modes in air-hole based PC slabs, cavity Q reached up to 2,200 by utilizing a graded square lattice PC structure. This is approximately 18 times higher than those previously reported for PC defect-mode microcavities for QCLs. This large improvement is attributed to a suppression of the coupling between the cavity mode and the leaky modes thanks to the dielectric perturbation in the graded structure. We also predicted a dramatic reduction of the threshold current in the designed cavity down to one-fifteenth of that of a conventional QCL, due to a decreased optical volume.
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Affiliation(s)
- Y Wakayama
- Institute of Nano Quantum Information Electronics, The University of Tokyo 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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26
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Jeon HJ, Hosokawa S, Iwamoto S, Inoue M. Solvothermal synthesis of rare earth–iron mixed oxide. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081105] [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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27
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Hosokawa S, Tanaka Y, Jeon H, Iwamoto S, Inoue M. Glycothermal growth of yttrium aluminium garnet nanocrystals. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308081129] [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: 11/11/2022] Open
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28
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Tsuge H, Nagahama M, Oda M, Iwamoto S, Utsunomiya H, Marquez V, Katunuma N, Nishizawa M, Sakurai J. Structural basis of actin recognition and ADP-ribosylation by Clostridium perfringensiota-toxin. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308088624] [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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29
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Aihara Y, Yasuoka A, Iwamoto S, Yoshida Y, Misaka T, Abe K. Construction of a taste-blind medaka fish and quantitative assay of its preference-aversion behavior. Genes Brain Behav 2008; 7:924-32. [PMID: 18700838 PMCID: PMC2667311 DOI: 10.1111/j.1601-183x.2008.00433.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
In vertebrates, the taste system provides information used in the regulation of food ingestion. In mammals, each cell group within the taste buds expresses either the T1R or the T2R taste receptor for preference–aversion discrimination. However, no such information is available regarding fish. We developed a novel system for quantitatively assaying taste preference–aversion in medaka fish. In this study, we prepared fluorescently labeled foods with fine cavities designed to retain tastants until they were bitten by the fish. The subjects were fed food containing a mixture of amino acids and inosine monophosphate (AN food), denatonium benzoate (DN food) or no tastant (NT food), and the amounts of ingested food were measured by fluorescence microscopy. Statistical analysis of the fluorescence intensities yielded quantitative measurements of AN food preference and DN food aversion. We then generated a transgenic fish expressing dominant-negative Gαi2 both in T1R-expressing and in T2R-expressing cells. The feeding assay revealed that the transgenic fish was unable to show a preference for AN food and an aversion to DN food. The assay system was useful for evaluating taste-blind behaviors, and the results indicate that the two taste signaling pathways conveying preferable and aversive taste information are conserved in fish as well as in mammals.
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Affiliation(s)
- Y Aihara
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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Tandaechanurat A, Iwamoto S, Nomura M, Kumagai N, Arakawa Y. Increase of Q-factor in photonic crystal H1-defect nanocavities after closing of photonic bandgap with optimal slab thickness. Opt Express 2008; 16:448-455. [PMID: 18521177 DOI: 10.1364/oe.16.000448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We investigate the dependence of quality factor Q of dipole modes in photonic crystal H1-defect nanocavity on the slab thickness and observe an increase of Q even after closing of the photonic bandgap both in numerical simulation and experimentation. This counter intuitive behavior results from the weak coupling between the cavity mode and the 2nd-guided mode in the photonic crystal slab. This is confirmed by computing the overlap between them in the momentum space.
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Affiliation(s)
- A Tandaechanurat
- 1Research Center for Advanced Science and Technology, The University of Tokyo 4-6-1, Komaba, Meguro-ku, Tokyo 153-8505, Japan
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32
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Yanagisawa Y, Iwamoto S, Kawabata T, Nakamura Y, Charupoonphol P, Supannatas S, Sone H, Kaneko Y, Watanabe S, Komatsu F, Sakuma M, Miyagi S, Hasegawa K, Kagawa Y. Leptin resistance conferred by a combination of single nucleotide polymorphism and the adoption of a Western lifestyle in urban areas of Thailand. J Nutr Health Aging 2006; 10:176-82. [PMID: 16622580] [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: 05/08/2023]
Abstract
OBJECTIVES An increasing number of lifestyle disorders have emerged in response to the rapid urbanization that has occurred in Thailand. Recently, leptin resistance has been nominated as a possible marker for the onset of metabolic disorders in Asian countries. The research aimed to assess the relationship between leptin-resistance and environmental and/or genetic factors by comparing urban and rural inhabitants in Thailand. METHODS A total of 212 age- and sex-matched subjects from an urban area (Bangkok) and from rural areas (Sai Noi) participated in the study. Anthropometric measurements, blood biochemistry, single nucleotide polymorphism analyses, and interviews concerning lifestyles and dietary habits were conducted individually. Backward elimination multiple regression analyses and least trimmed sum of square methods were used to estimate the effects of possible factors. RESULTS A transition of staple food from rice to bread (decreased rice intake; p < 0.01 and increased bread intake; p < 0.05) was significant in urban areas. Leptin levels were higher in urban groups, with a significant difference in women (p < 0.001 in women and p = 0.06 in men), but not in men. Predictors selected for leptin-resistance in women were genotypes of UCP2, PPARg2, bread intake, living area, and smoking habit (r = 0.510); in men, genotypes of UCP2 and UCP3p, smoking habit, and rice intake (r = 0.315). CONCLUSIONS Urban women with del/del type of UCP2 exhibited significant leptin resistance. A combination of urbanization and UCP2 genotype were considered to be responsible.
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Affiliation(s)
- Y Yanagisawa
- Division of Human Genetics, Jichi Medical School, Yakushiji 3311-1, Minamikawachi-machi, Kawachi-gun, Tochigi 329-0498, Japan.
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33
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Omi T, Brenig B, Spilar Kramer S, Iwamoto S, Stranzinger G, Neuenschwander S. Identification and characterization of novel peroxisome proliferator-activated receptor-gamma (PPAR-gamma) transcriptional variants in pig and human. J Anim Breed Genet 2005; 122 Suppl 1:45-53. [PMID: 16130456 DOI: 10.1111/j.1439-0388.2005.00508.x] [Citation(s) in RCA: 17] [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: 11/29/2022]
Abstract
The peroxisome proliferator-activated receptor-gamma (PPAR-gamma) is a member of the steroid/thyroid/retinoid receptor superfamily, and is primarily expressed in fat tissue. To date, two major PPAR-gamma isoforms have been identified in pig, PPAR-gamma1 and PPAR-gamma2. Porcine PPAR-gamma1a consists of two leader exons, designated A1 and A2, followed by six exons containing the open reading frame. Here, we report the isolation and characterization of three novel PPAR-gamma1 transcripts. PPAR-gamma1b is derived from exon A1, with exon A2 spliced out. PPAR-gamma1c and PPAR-gamma1d are derived from the new exon, A', containing exon A2 (gamma1c) or without exon A2 (gamma1d). Based on PCR analysis of PAC clones that included sequences from the 5'-untranslated region of the PPAR-gamma gene, the new A' exon is located between the known exons A1 and A2. We also isolated the human homologue to exon A', as well as the two new PPAR-gamma1c and -gamma1d splice variants, from human adipose tissue. Studies of the expression of porcine PPAR-gamma by real time reverse transcription-polymerase chain reaction analysis show that transcripts derived from exon A1 were not expressed at significantly different levels in visceral fat (lamina subserosa) or subcutaneous fat (back fat, inner and outer layer). In contrast, exon A'-derived transcripts were expressed at progressively higher levels in the inner and outer layers of subcutaneous fat than in visceral fat. The same expression pattern was also observed for PPAR-gamma2. We hypothesize that there are three promoters, which differentially regulate PPAR-gamma1 and PPAR-gamma2 gene expression, depending on the specific localization of the fat tissue.
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Affiliation(s)
- T Omi
- Swiss Federal Institute of Technology, Institute of Animal Sciences, Zurich, Switzerland
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Mishima H, Ishida H, Iwamoto S, Morimoto T, Kato T, Tsujinaka T, Furukawa H. Multi-center phase II study of irinotecan + 5-FU/ l-LV (RPMI) chemotherapy for patients with metastasic colorectal cancer (OGSG0201). J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.3700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- H. Mishima
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
| | - H. Ishida
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
| | - S. Iwamoto
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
| | - T. Morimoto
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
| | - T. Kato
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
| | - T. Tsujinaka
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
| | - H. Furukawa
- Osaka National Hosp, Osaka, Japan; Osaka Seamens Insurance Hosp, Osaka, Japan; Kansai Medcl Univ, Moriguchi, Japan; Yao City Hosp, Yao, Japan; Mino City Hosp, Mino, Japan; Sakai City Hosp, Sakai, Japan
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35
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Iwamoto S, Kubo H, Goto M, Yamada K, Yotsui Y, Arika T, Morita S, Kakudo K. Postoperative evaluation of jaw function with restricted mandibular movement resulting from hyperplasia of masticatory muscle aponeurosis. Int J Oral Maxillofac Surg 2005. [DOI: 10.1016/s0901-5027(05)81353-0] [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: 11/24/2022]
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36
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Iwamoto S, Nakajma M, Kikuchi Y, Nabetani H. Precision control of the surface structure of gelatin films using micropit plates. Colloids Surf B Biointerfaces 2004; 38:15-20. [PMID: 15465299 DOI: 10.1016/j.colsurfb.2004.08.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2004] [Revised: 08/03/2004] [Accepted: 08/03/2004] [Indexed: 10/26/2022]
Abstract
We attempted to use micropit plates as a silicon mold in order to control the surface structures of gelatin films. The three-dimensional micropit plates, fabricated with micromachining technology, have uniform quadrangular or circular pits with side lengths or diameters from 25-400 microm and depths of 40 microm. The micropit plates were originally hydrophilic because of silanol groups on the surface. In order to facilitate peeling the aqueous gelatin film from the micropit plates, the plate was therefore modified with hexamethyldisilazane. Gelatin films with precisely microfabricated structures on the surfaces were obtained by using the modified micropit plates. The release behavior of the films with different surface structures was examined.
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Affiliation(s)
- S Iwamoto
- National Food Research Institute, 2-1-12, Kannondai, Tsukuba, Ibaraki 305-8642, Japan.
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Ishida H, Mishima H, Iwamoto S, Morimoto T, Kato T, Tsujinaka T, Furukawa H. Multicenter phase II study of irinotecan plus weekly bolus 5-FU and high dose l-leucovorin for patients with metastatic colorectal cancer (OGSG 0201). J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.3718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- H. Ishida
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
| | - H. Mishima
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
| | - S. Iwamoto
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
| | - T. Morimoto
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
| | - T. Kato
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
| | - T. Tsujinaka
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
| | - H. Furukawa
- Osaka Gastrointestinal Cancer Chemotherapy Study Group, Osaka, Japan
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Kamesaki T, Kumada M, Omi T, Okuda H, Iwamoto S, Takahashi J, Kimura K, Hirayama F, Kamata H, Obara K, Taniguchi M, Tani Y, Kajii E. A novel mutation in the RHD gene in Japanese individuals with weak D, encoding an amino acid change in the 11th transmembranous domain of the RhD protein. Vox Sang 2003; 84:141. [PMID: 12609022 DOI: 10.1046/j.1423-0410.2003.00274.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Konishi M, Tokuhara N, Iwamoto S. The effect of anabolic steroid on the distribution of muscle fiber in rat hind limb. Ital J Anat Embryol 2002; 106:175-83. [PMID: 11729953] [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: 02/22/2023]
Abstract
This study evaluates the effect of anabolic steroid hormone (nandrolone decanoate, 19-Nortestosterone; ND) on histomorphometry and distribution of muscle fiber in the rat tibialis anterior (TA) muscle compared with the control rats. Three male Wistar rats aged of 5 weeks were daily received subcutaneous injection of 0.3 cc vehicle oil included 1mg ND for 6 weeks. Two control (C) rats were done only vehicle oil by the same manner as the experimental (E) group. The TA muscle was stained for myofibrillar adenosine triphosphatease with preincubation at pH 4.35, after cryosectioning at the thickness of 10 microm. Muscle fibers were classified into type I, IIA, IIX, and IIB. The E group showed significantly smaller than the C group in body weight. In histomorphometry, the cross-sectional area of type IIB fibers in the E group showed narrow range, and shifted smaller than those in the C groups. The distribution of type I fibers was restricted to the deep region in the E group. The anabolic steroid facilitated toward the older rat type on distribution and proportion of muscular tissue.
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Affiliation(s)
- M Konishi
- Osaka College of Rehabilitation, Department of Occupational Therapy, School of Health Science, Kyushu University of Health and Welfare, Japan.
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Yamamoto H, Kobayashi A, Yamashita M, Higashi A, Kariatsumari K, Suehiro S, Hisashi Y, Iwamoto S, Miyazaki T, Toyohira H. [Long-term results of aortic arch replacement using combination of deep hypothermic circulatory arrest and retrograde cerebral perfusion; comparison of result for atherosclerotic aneurysm and aortic dissection]. Kyobu Geka 2002; 55:274-9. [PMID: 11968703] [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: 02/24/2023]
Abstract
Between 1992 and 2001, 73 patients with aortic arch lesion underwent surgical treatment. The aneurysm was characterized by atherosclerosis in 54 patients (TAA) and by aortic dissection in 19 patients (DAA). All patients received graft replacement under combination of deep hypothermic circulatory arrest and retrograde cerebral perfusion. The hospital mortality rate for all patients was 15.6%. The follow-up period of 61 survival patients ranged from 2 to 90 months (mean 33.2 months). The actuarial survival rate was 93.2%, 83.5%, and 79.7% at 1, 3, and 5 years, respectively. No significant difference was noted between TAA and DAA in the actuarial survival rate. The freedom from vascular complication was 97.9%, 95.8%, and 95.8% at 1, 3, and 5 years, respectively. The rate was significant higher in the patients of DAA than in those of TAA (TAA: 100%, 100%, and 100%, DAA: 90.9%, 81.8%, and 81.8%). The freedom from cardiac complication was 96.4%, 89.7%, and 84.1% at 1, 3, and 5 years, respectively. There was no significant difference between TAA and DAA. The freedom from cerebrovascular complication was 100%, 97.6%, and 83.4% at 1, 3, and 5 years, respectively. No significant difference was noted between TAA and DAA. The late result of surgical treatment for the aortic arch using combination of deep hypothermic circulatory arrest and retrograde cerebral perfusion was satisfied. The long-term survival rate was higher in TAA patient than in DAA one. The possibility remained that fatal vascular complication affected the long-term survival rate.
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Affiliation(s)
- H Yamamoto
- Department of Cardiovascular Surgery, National Hospital Kyusyu Cardiovascular Center, Kagoshima, Japan
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Kobayashi T, Shinohara H, Toyoda M, Iwamoto S, Tanigawa N. Regression of lymph node metastases by immunotherapy using autologous breast tumor-lysate pulsed dendritic cells: report of a case. Surg Today 2001; 31:513-6. [PMID: 11428604 DOI: 10.1007/s005950170112] [Citation(s) in RCA: 12] [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] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A 50-year-old woman was diagnosed as having stage IV breast cancer with bilateral supraclavicular lymph node metastasis resistant to CAF therapy. She received immunotherapy using autologous tumor lysate-pulsed dendritic cells (DCs). Four cycles of DC injection into the right supraclavicular lymph nodes resulted in regression of bilateral supraclavicular lymphogenous metastasis. Histological studies revealed an accumulation of CD45+ T lymphcytes in the regressive lymph nodes. This case suggests that immunotherapy with DCs may be a safe and promising approach for the treatment of advanced breast cancer.
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Affiliation(s)
- T Kobayashi
- Department of General and Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan
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Kamesaki T, Iwamoto S, Kumada M, Omi T, Okuda H, Tanaka M, Takahashi J, Obara K, Seno T, Tani Y, Kajii E. Molecular characterization of weak D phenotypes by site-directed mutagenesis and expression of mutant Rh-green fluorescence protein fusions in K562 cells. Vox Sang 2001; 81:254-8. [PMID: 11904002 DOI: 10.1046/j.1423-0410.2001.00118.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND AND OBJECTIVES Mutations detected in 161 weak D samples from Caucasians have been classified into 16 types. Because flow cytometry using monoclonal anti-D antibodies (mAbs) has shown that weak D red cells display type-specific antigen density, these mutations in transmembranous regions have been assigned weak D phenotypes. The present study attempts to confirm or refute this assignment. MATERIALS AND METHODS We amplified DNA from four Japanese weak D samples using the polymerase chain reaction (PCR), and directly sequenced the amplified DNA. Using site-directed mutagenesis, we constructed three vectors expressing mutant RHDs-- G212C, V270G (weak D type 1) and G358A (type 2)--in K562 cells. The expression of RhD antigens was examined by flow cytometry using mAbs. RESULTS A new mutation resulting in a conversion at amino acid residue 212 (Gly to Cys) was detected in a Japanese weak D sample. K562 cells transduced with mutant RhD cDNA reacted weakly in a type-specific manner with mAbs. CONCLUSIONS The mutations--G212C (new weak D type), V270G (weak D type 1) and G358A (type 2)-- in transmembranous regions had obvious effects on the D epitopes recognized by mAbs. The results of this study provide direct evidence that these mutations can account for weak D phenotypes.
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Affiliation(s)
- T Kamesaki
- Department of Legal Medicine and Human Genetics, Jichi Medical School, Tochigi 329-0498, Japan.
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Iwamoto S, Kamesaki T, Oyamada T, Okuda H, Kumada M, Omi T, Takahashi J, Tani Y, Omine M, Kajii E. Reactivity of autoantibodies of autoimmune hemolytic anemia with recombinant rhesus blood group antigens or anion transporter band3. Am J Hematol 2001; 68:106-14. [PMID: 11559950 DOI: 10.1002/ajh.1161] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/07/2022]
Abstract
The specificity of autoantibodies in autoimmune hemolytic anemia (AIHA) has been studied using the serological procedure and immunoprecipitation technique with rare phenotype red cells. We attempted to analyze specificity using recombinant rhesus (Rh) blood group and band3 antigens expressed on erythroleukemic cell lines, KU812E. The autoantibody eluates were isolated by the acid elution procedure from the red cells of 20 AIHA patients. The recombinant Rh antigens, RhD, cE, ce, CE, and chimera antigens CE-D and D-CE, were obtained by retroviral cDNA transduction into KU812E cells, and the cell line expressing the antigens was cloned. Band3 cDNA was also obtained and introduced into KU812E and cloned KU812 expressing RhcE. The reactivities of AIHA eluates with recombinant Rh and band3 antigens were studied by flow cytometry. Fifteen eluates reacted with at least one of the RhcE, ce, or CE antigens, and four eluates reacted with RhD. Seven eluates with strong Rh specificity were studied further using chimera antigen. Five eluates showed reduced or lost reactivity, although two eluates reacted identically with the chimera antigens as wild type. These results indicated that conformational epitopes constituted by RhD or CE specific exofacial peptide loops are important for autoantibodies in most cases. Seven eluates reacted with band3, five exclusively. The coexpression study of RhcE and band3 did not enhance the expression of either antigen nor the reactivity with patient eluates, indicating that association of Rh and band3 was not involved in the appearance of autoantigen.
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MESH Headings
- Anemia, Hemolytic, Autoimmune/blood
- Anemia, Hemolytic, Autoimmune/immunology
- Anion Exchange Protein 1, Erythrocyte/immunology
- Anion Exchange Protein 1, Erythrocyte/metabolism
- Antibodies, Monoclonal/immunology
- Antibodies, Monoclonal/metabolism
- Antibody Specificity
- Antigen-Antibody Complex/analysis
- Autoantibodies/blood
- Autoantibodies/immunology
- Autoantibodies/isolation & purification
- Epitopes
- Erythrocytes/chemistry
- Erythrocytes/immunology
- Flow Cytometry
- Humans
- Recombinant Fusion Proteins/immunology
- Recombinant Fusion Proteins/metabolism
- Recombinant Proteins/immunology
- Rh-Hr Blood-Group System/immunology
- Transduction, Genetic
- Tumor Cells, Cultured
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Affiliation(s)
- S Iwamoto
- Department of Legal Medicine and Human Genetics, Jichi Medical School, Tochigi, Japan.
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Iwamoto S, Okuda K. Hepatobiliary and pancreatic: an old woman with hepatocellular carcinoma who underwent resection and chemoembolization. J Gastroenterol Hepatol 2001; 16:1166, 1170. [PMID: 11686846 DOI: 10.1046/j.1440-1746.2001.2608a.x] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- S Iwamoto
- Department of Medicine, Chiba University Hospital, Japan
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45
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Kobayashi M, Azuma E, Ido M, Hirayama M, Jiang Q, Iwamoto S, Kumamoto T, Yamamoto H, Sakurai M, Komada Y. A pivotal role of Rho GTPase in the regulation of morphology and function of dendritic cells. J Immunol 2001; 167:3585-91. [PMID: 11564770 DOI: 10.4049/jimmunol.167.7.3585] [Citation(s) in RCA: 61] [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] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Dendritic cell (DC) is the most potent activator of CD4+ T cells and has unique dendrites and veils. To explore the function of Rho in DC, exoenzyme C3 from Clostridium botulinum was used as a specific inhibitor of Rho. Treatment of DC with C3 (DC/C3) resulted in profound morphological changes by losing dendrites and emerging of shrunk membrane processes that were in parallel with marked reduction of polymerized actin in the marginal area. Inactivation of Rho-associated coiled coil-containing kinase (p160ROCK) by a specific ROCK inhibitor Y-27632 also led to disappearance of dendrites of DC with retaining large membrane expansions. In scanning electron microscopy, untreated DCs interacted with CD4+ T cells more efficiently than DC/C3. Conjugate formation assay showed that the number of DCs associated with CD4+ T cells was 2-fold higher in untreated DCs than that of DC/C3. Alloantigen-presenting capacity of DC/C3 was significantly suppressed in a dose-dependent manner. Because C3 treatment did not affect the surface expression of HLA, costimulatory, and adhesion molecules of DC, we examined cytokine production of DC and naive CD4+ T cells to further elucidate the inhibitory mechanism of MLR. Unexpectedly, DC/C3 increased IL-12 production after LPS stimulation. Naive CD4+ T cells cocultured with DC/C3 produced the increased percentage of IFN-gamma-producing cells, whereas the percentage of IL-2-producing T cells was decreased. These results demonstrate that Rho GTPase in DC controls both characteristic shape and immunogenic capacity.
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Affiliation(s)
- M Kobayashi
- Department of Pediatrics and Clinical Immunology, Mie University School of Medicine, 2-174 Edobashi, Tsu, Mie 514-8507, Japan
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46
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Iwamoto S, Burrows RC, Agoff SN, Piepkorn M, Bothwell M, Schmidt R. The p75 neurotrophin receptor, relative to other Schwann cell and melanoma markers, is abundantly Expressed in spindled melanomas. Am J Dermatopathol 2001; 23:288-94. [PMID: 11481518 DOI: 10.1097/00000372-200108000-00002] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Seventeen cases of spindled melanomas and eleven cases of epithelioid melanomas were immunolabeled with various melanoma and Schwann cell markers. Standard melanoma markers included S100, HMB45, HMB50, tyrosinase, and Melan A. Schwann cell markers included the p75 neurotrophin receptor (p75NTR), glial fibrillary acidic protein (GFAP), and the L1 adhesion protein. The degree of immunocytochemical labeling was scored by levels of both intensity and pervasiveness. The results confirmed a distinct difference in labeling between epithelioid and spindled melanomas. The p75NTR was strongly expressed in spindled melanomas and weakly expressed in the epithelioid melanomas. The usual melanoma markers, including HMB45, HMB50, MelanA, and tyrosinase had the reverse pattern, being strongly expressed in virtually all epithelioid melanomas, but rarely expressed in the spindled variants. S100 was unique among the markers in being expressed by both epithelioid and spindled melanomas. Glial fibrillary acidic protein and L1 adhesion protein were expressed moderately, with preferential labeling of the spindled melanomas. The greatest immunophenotypic difference between spindled and epithelioid melanomas was the high abundance of p75NTR expression in spindled melanomas. The functional significance of the high level of p75 neurotrophin receptor expression may contribute to the high predisposition of perineural extension in the desmoplastic subset of spindled melanomas.
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Affiliation(s)
- S Iwamoto
- Department of Physiology and Biophysics, University of Washington, Seattle, Washington, USA.
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Jiang Q, Azuma E, Tanaka M, Kobayashi M, Hirayama M, Kumamoto T, Iwamoto S, Yamamoto H, Nakashima K, Sakurai M, Komada Y. Differential responsiveness of cord and adult blood monocytes to hepatocyte growth factor. Clin Exp Immunol 2001; 125:222-8. [PMID: 11529913 PMCID: PMC1906136 DOI: 10.1046/j.1365-2249.2001.01591.x] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Monocytes as antigen-presenting cells play an important role in host defence. There are several cytokines affecting monocyte function. We demonstrate that both adult and cord blood monocytes constitutively express hepatocyte growth factor (HGF) receptor, MET. HGF significantly down-regulated MET expression of adult blood monocytes, compared with cord blood monocytes, when cultured either in RPMI-1640 containing 10% FBS or serum-free medium. Surface levels of MET correlated with c-met mRNA levels both in adult and cord blood when cultured. MET expression was down-regulated by treating with actinomycin D or cycloheximide. HGF stimulated DNA synthesis of adult monocytes, but not cord blood. HGF enhanced antigen-presenting capacity of adult blood monocytes but not cord blood monocytes. HGF up-regulated HLA class I expression in adult monocytes but not in cord blood monocytes. The current results suggest that the failure of cord blood monocytes to respond to HGF may be responsible, in large part, for their functional immaturity.
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Affiliation(s)
- Q Jiang
- Department of Paediatrics, Mie University School of Medicine, Japan
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Jiang Q, Azuma E, Hirayama M, Iwamoto S, Kumamoto T, Kobayashi M, Yamamoto H, Sakurai M, Komada Y. Functional immaturity of cord blood monocytes as detected by impaired response to hepatocyte growth factor. Pediatr Int 2001; 43:334-9. [PMID: 11472574 DOI: 10.1046/j.1442-200x.2001.01420.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
BACKGROUND Monocytes as antigen-presenting cells play an important role in host defense and transplantation. However, there are little reports on cord blood monocytes, and the role of monocytes in cord blood transplantation is largely unknown. METHODS AND RESULTS There are several cytokines affecting monocyte function. These include interferon-gamma, interleukin-4, interleukin-10, granulocyte macrophage-colony stimulating factor and hepatocyte growth factor (HGF). We investigated the effect of these cytokines on antigen-presenting capacity (APC) of cord and adult blood monocytes. Using either mononuclear cells or purified CD4+ T cells as responder cells, HGF enhanced APC of adult monocytes most effectively among these cytokines. In contrast, cord blood monocytes failed to respond to HGF. As HLA, costimulatory and adhesion molecules may affect APC function, we examined these antigens of monocytes following HGF stimulation. The HGF upregulated integrin alpha5 subunit (CD49e) and intercellular adhesion molecule-1 (CD54) was expressed in adult blood monocytes, but not in cord blood. In kinetic studies, HGF downregulated c-met protein/HGF receptor expression of adult monocytes in lower concentrations and at shorter incubation time as compared with that of cord blood. CONCLUSIONS The results suggest that impaired response of cord blood monocytes to HGF may be responsible, in large part, for their functional immaturity.
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Affiliation(s)
- Q Jiang
- Department of Pediatrics and Clinical Immunology, Mie University School of Medicine, Japan
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Affiliation(s)
- K Iki
- Department of Gastroenterological Surgery, Kawasaki Medical School, Kurashiki City, Okayama, Japan
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50
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Iwamoto S, Hioki K. [Preoperative and postoperative nutritional management for diabetic patients]. Nihon Rinsho 2001; 59 Suppl 5:671-3. [PMID: 11439625] [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)
- S Iwamoto
- Second Department of Surgery, Kansai Medical University
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