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Yamamoto S, Yoshino M, Nakanishi K, Kamada K, Yoshikawa A, Tanaka H, Kataoka J. Development of an event-by-event based Li-ZnS(Ag) neutron imaging detector with selective neutron detection capability. Appl Radiat Isot 2024; 204:111084. [PMID: 38016258 DOI: 10.1016/j.apradiso.2023.111084] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 09/28/2023] [Accepted: 10/23/2023] [Indexed: 11/30/2023]
Abstract
High sensitivity and high resolution is desired in such technologies as neutron radiography. However, the contamination of gamma photons in neutron images decreases the accuracy of neutron radiography. To solve this problem, we developed an event-by-event based neutron imaging system that can selectively detect neutrons. The developed neutron imaging system consists of an Li-ZnS(Ag) scintillator plate optically coupled to a flat panel photomultiplier tube (FP-PMT) with a light guide. Scintillation light emitted from the Li-ZnS(Ag) by the interaction with neutron-induced particles is used to calculate the position based on the center of mass calculations. The spatial resolution of the neutron imaging detector is ∼2.3 mm FWHM, and the sensitivity for 252Cf at 2 cm from the source with 2-cm-thick polystyrene is 20 cps/MBq. Background count fraction from 60Co gamma photons was 0.2 %. For various types of neutron absorption phantoms, high-contrast and high-resolution neutron images are obtained with the developed neutron imaging detector using a252Cf neutron source.
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Affiliation(s)
| | - Masao Yoshino
- New Industry Creation Hatchery Center, Tohoku University, Japan
| | | | - Kei Kamada
- New Industry Creation Hatchery Center, Tohoku University, Japan
| | - Akira Yoshikawa
- New Industry Creation Hatchery Center, Tohoku University, Japan
| | - Hiroki Tanaka
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Japan
| | - Jun Kataoka
- Faculty of Science and Engineering, Waseda University, Japan
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Yamamoto S, Yoshino M, Nakanishi K, Yogo K, Kamada K, Yoshikawa A, Kataoka J. A comparative study of EM-CCD and CMOS cameras for particle ion trajectory imaging. Appl Radiat Isot 2024; 204:111143. [PMID: 38101006 DOI: 10.1016/j.apradiso.2023.111143] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 12/05/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
High-resolution and real-time imaging of particle ion trajectories is essential in nuclear medicine and nuclear engineering. One potential method to achieve high-resolution real-time trajectory imaging of particle ions involves utilizing an imaging system that integrates a scintillator plate with a magnifying unit and a cooled electron multiplying charge-coupled device (EM-CCD) camera. However, acquiring an EM-CCD camera might prove challenging due to the discontinuation of CCD sensor manufacturing by vendors. As an alternative imaging approach, a low-noise, high-sensitivity camera utilizing a cooled complementary metal-oxide-semiconductor (CMOS) sensor offers a promising solution for imaging particle ion trajectories. Yet, it remains uncertain whether CMOS-based cameras can perform as effectively as CCD-based cameras in capturing particle ion trajectories. To address these concerns, we conducted a comparative analysis of the imaging performance between a CMOS-based system and an EM-CCD-based system for capturing alpha particle trajectories. The results revealed that both systems could image the trajectories of alpha particle, but the spatial resolution with the CMOS-based camera exceeded that of the EM-CCD-based camera, primarily due to the smaller pixel size of the sensor. While the signal-to-noise ratio (SNR) of the trajectory image from the CMOS-based camera initially lagged behind that from the EM-CCD-based camera, this disparity was mitigated by implementing binning techniques on the CMOS-based camera images. In conclusion, our findings suggest that a cooled CMOS camera could serve as a viable alternative for imaging particle ion trajectories.
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Affiliation(s)
| | - Masao Yoshino
- New Industry Creation Hatchery Center, Tohoku University, Japan
| | | | | | - Kei Kamada
- New Industry Creation Hatchery Center, Tohoku University, Japan
| | - Akira Yoshikawa
- New Industry Creation Hatchery Center, Tohoku University, Japan
| | - Jun Kataoka
- Faculty of Science and Engineering, Waseda University, Japan
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Yamamoto S, Yoshino M, Kamada K, Yajima R, Yoshikawa A, Nakanishi K, Kataoka J. Development of an ultrahigh resolution real time alpha particle imaging system for observing the trajectories of alpha particles in a scintillator. Sci Rep 2023; 13:4955. [PMID: 37100780 PMCID: PMC10133294 DOI: 10.1038/s41598-023-31748-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/16/2023] [Indexed: 04/28/2023] Open
Abstract
High-resolution imaging of alpha particles is required in the detection of alpha radionuclides in cells or small organs for the development of radio-compounds for targeted alpha-particle therapy or other purposes. We developed an ultrahigh resolution, real time alpha-particle imaging system for observing the trajectories of alpha particles in a scintillator. The developed system is based on a magnifying unit and a cooled electron multiplying charge-coupled device (EM-CCD) camera, combined with a 100-µm-thick Ce-doped Gd3Al2Ga3O12 (GAGG) scintillator plate. Alpha particles from an Am-241 source were irradiated to the GAGG scintillator and imaged with the system. Using our system, we measured the trajectories of the alpha particles having different shapes in real time. In some of these measured trajectories, the line shapes of the alpha particles that flew in the GAGG scintillator were clearly observed. The lateral profiles of the alpha-particle trajectories were imaged with widths of ~ 2 µm. We conclude that the developed imaging system is promising for research on targeted alpha-particle therapy or other alpha particle detections that require high spatial resolution.
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Affiliation(s)
- Seiichi Yamamoto
- Faculty of Science and Engineering, Waseda University, Tokyo, Japan.
| | - Masao Yoshino
- New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
- C&A Corporation, Sendai, Japan
| | - Kei Kamada
- New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
- C&A Corporation, Sendai, Japan
| | - Ryuga Yajima
- Department of Materials Science, Graduate School of Engineering, Tohoku University, Sendai, Japan
| | - Akira Yoshikawa
- C&A Corporation, Sendai, Japan
- Institute for Materials Research, Tohoku University, Sendai, Japan
| | - Kohei Nakanishi
- Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Jun Kataoka
- Faculty of Science and Engineering, Waseda University, Tokyo, Japan
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Ohashi Y, Owada Y, Yokota Y, Omote M, Kurosawa S, Kamada K, Sato H, Toyoda S, Yamaji A, Yoshino M, Hanada T, Yoshikawa A. Temperature Characteristics of Resonance Frequency for Double-Layered Thickness-Shear Resonator. IEEE Trans Ultrason Ferroelectr Freq Control 2022; 69:870-877. [PMID: 34673486 DOI: 10.1109/tuffc.2021.3121782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The effect of the difference in the thickness ratio of the double-layered thickness-shear resonator on the temperature characteristics of the resonance frequency was investigated using a Ca3TaGa3Si2O14 (CTGS) single crystal. Three specimens with thickness ratios of x = 0.25 , 0.33, and 0.50 were prepared using 122° Y - and 171° Y -cut CTGS substrates. For the specimens with x = 0.25 and 0.33, the temperature characteristics varied depending on the order of the resonance mode. For the specimen with x = 0.50 , on the other hand, almost the same temperature characteristics were observed regardless of the order of the resonance mode. To interpret this phenomenon, a new equation for predicting the temperature characteristics of the fundamental mode (first mode) for the double-layered resonator was created using the electric flux density ratio generated in the two substrates. The expected values using this equation were in good agreement with the result of the first mode temperature characteristics.
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Chewpraditkul W, Pattanaboonmee N, Chewpraditkul W, Sakthong O, Kim KJ, Yoshino M, Horiai T, Kurosawa S, Yoshikawa A, Kamada K, Drozdowski W, Witkowski ME, Makowski M, Kucerkova R, Nikl M. Luminescence and scintillation properties of Gd3Sc2(Al3-xGax)O12:Ce (x = 1, 2, 3) garnet crystals. Radiat Phys Chem Oxf Engl 1993 2021. [DOI: 10.1016/j.radphyschem.2021.109559] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cadatal-Raduban M, Yoshino M, Yokota Y, Yoshikawa A, Hayazawa N, Asano D, Shinohara K, Shimizu T, Sarukura N, Yamanoi K. Mid-infrared imaging through up-conversion luminescence in trivalent lanthanide ion-doped self-organizing optical fiber array crystal. Opt Lett 2021; 46:941-944. [PMID: 33649626 DOI: 10.1364/ol.416717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
We propose a scheme for imaging mid-infrared (MIR) wavelengths via pre-excitation-assisted up-conversion luminescence in lanthanide ion (Ln3+)-doped Self-organizing Optical FIber Array (SOFIA) crystal. First, near-infrared pre-excitation wavelength excites an electron from the ground state to an excited state of Ln3+. Next, the MIR wavelength to be imaged promotes this excited electron to a higher-lying energy state. Finally, relaxation of the electron from the higher-lying energy state to the ground state emits the up-conversion luminescence in the visible region, completing the MIR-to-visible wavelength conversion. An analysis of the 4f to 4f intra-configurational energy level transitions in Ln3+, together with an appropriate selection of the pre-excitation wavelength and the visible luminescence constrained within the 500-700 nm wavelength range, reveals that trivalent erbium (Er3+), thulium (Tm3+), holmium (Ho3+), and neodymium (Nd3+) can be used to image MIR wavelengths. Our proposed scheme, called MIR imAging through up-Conversion LuminEscence in a SOFIA crystal, will enable the imaging of MIR wavelengths using low-cost optics and readily available silicon-based detectors in the visible spectral region and will open up new possibilities for MIR wavelength detection and imaging.
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Wu M, Yoshino M, Hu M, Kao C, Ma Q. PNS64 Landscape Analysis of Studies in Asia Eliciting Patient Preferences for Therapeutic Interventions. Value Health Reg Issues 2020. [DOI: 10.1016/j.vhri.2020.07.483] [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: 11/30/2022]
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8
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Yokota Y, Kudo T, Ohashi Y, Inoue K, Yoshino M, Yamaji A, Kurosawa S, Kamada K, Yoshikawa A. Al concentration dependence of crystal structure for Ca3Ta(Ga,Al)3Si2O14 piezoelectric single crystals. J SOLID STATE CHEM 2019. [DOI: 10.1016/j.jssc.2019.06.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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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9
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Kurosawa S, Shishido T, Sugawara T, Yubuta K, Horiai T, Jarý V, Yamaji A, Yoshino M, Yokota Y, Shoji Y, Kamada K, Yoshikawa A, Pejchal J, Nikl M. Scintillation properties of Y-Admixed Gd2Si2O7 scintillator. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.106123] [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: 10/26/2022]
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10
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Kodama S, Kurosawa S, Ohno M, Yamaji A, Yoshino M, Pejchal J, Král R, Ohashi Y, Kamada K, Yokota Y, Nikl M, Yoshikawa A. Development of a novel red-emitting cesium hafnium iodide scintillator. RADIAT MEAS 2019. [DOI: 10.1016/j.radmeas.2019.03.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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11
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Iizumi T, Yoshino M, Kagaya H, Hori K, Ono T. Effect of tongue-palate contact mode on food transport during mastication. J Oral Rehabil 2018; 45:605-611. [DOI: 10.1111/joor.12654] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2018] [Indexed: 11/27/2022]
Affiliation(s)
- T. Iizumi
- Department of Communication Disorders; School of Rehabilitation Science; Health Sciences University of Hokkaido; Hokkaido Japan
- Department of Rehabilitation Medicine I; School of Medicine; Fujita Health University; Toyoake Japan
| | - M. Yoshino
- Graduate School of Comprehensive Human Sciences; University of Tsukuba; Tokyo Japan
| | - H. Kagaya
- Department of Rehabilitation Medicine I; School of Medicine; Fujita Health University; Toyoake Japan
| | - K. Hori
- Division of Comprehensive Prosthodontics; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
| | - T. Ono
- Division of Comprehensive Prosthodontics; Niigata University Graduate School of Medical and Dental Sciences; Niigata Japan
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Takakura Y, Otsuki M, Nakagawa Y, Tajima Y, Mito Y, Ogata A, Koshimizu S, Yoshino M, Uemori G. Comparative symptomatology of apraxia of speech/anarthrie: Patients with neurodegenerative diseases versus cerebrovascular diseases. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.321] [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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13
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Shikaze Y, Nishizawa Y, Sanada Y, Torii T, Jiang J, Shimazoe K, Takahashi H, Yoshino M, Ito S, Endo T, Tsutsumi K, Kato S, Sato H, Usuki Y, Kurosawa S, Kamada K, Yoshikawa A. Field test around Fukushima Daiichi nuclear power plant site using improved Ce:Gd3(Al,Ga)5O12 scintillator Compton camera mounted on an unmanned helicopter. J NUCL SCI TECHNOL 2016. [DOI: 10.1080/00223131.2016.1185980] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Yoshiaki Shikaze
- Fukushima Environmental Safety Center, Sector of Fukushima Research and Development, Japan Atomic Energy Agency (JAEA), Tokyo, Japan
| | - Yukiyasu Nishizawa
- Fukushima Environmental Safety Center, Sector of Fukushima Research and Development, Japan Atomic Energy Agency (JAEA), Tokyo, Japan
| | - Yukihisa Sanada
- Fukushima Environmental Safety Center, Sector of Fukushima Research and Development, Japan Atomic Energy Agency (JAEA), Tokyo, Japan
| | - Tatsuo Torii
- Fukushima Environmental Safety Center, Sector of Fukushima Research and Development, Japan Atomic Energy Agency (JAEA), Tokyo, Japan
| | - Jianyong Jiang
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Kenji Shimazoe
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, Tokyo, Japan
| | - Hiroyuki Takahashi
- Department of Nuclear Engineering and Management, School of Engineering, The University of Tokyo, Tokyo, Japan
| | | | | | | | | | - Sho Kato
- Furukawa Co., Ltd., Tsukuba, Japan
| | | | | | - Shunsuke Kurosawa
- New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japan
- Institute for Materials Research (IMR), Tohoku University, Sendai, Japan
| | - Kei Kamada
- New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japan
| | - Akira Yoshikawa
- New Industry Creation Hatchery Center (NICHe), Tohoku University, Sendai, Japan
- Institute for Materials Research (IMR), Tohoku University, Sendai, Japan
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14
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Jiang J, Shimazoe K, Nakamura Y, Takahashi H, Shikaze Y, Nishizawa Y, Yoshida M, Sanada Y, Torii T, Yoshino M, Ito S, Endo T, Tsutsumi K, Kato S, Sato H, Usuki Y, Kurosawa S, Kamada K, Yoshikawa A. A prototype of aerial radiation monitoring system using an unmanned helicopter mounting a GAGG scintillator Compton camera. J NUCL SCI TECHNOL 2015. [DOI: 10.1080/00223131.2015.1089796] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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15
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Yagura H, Watanabe D, Ashida M, Kushida H, Tomishima K, Hirota K, Ikuma M, Yajima K, Kasai D, Nishida Y, Uehira T, Yoshino M, Shirasaka T. P17.29 UGT1A1*6 polymorphisms are predictive of high plasma concentrations of dolutegravir in Japanese individuals. Br J Vener Dis 2015. [DOI: 10.1136/sextrans-2015-052270.607] [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: 11/04/2022]
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16
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Kinemuchi H, Sunami Y, Yoshino M, Watanabe K, Sudo M, Kamijo K. Effect of lipid depletion and solubilization on inhibitor sensitivity of mitochondrial monoamine oxidase. Mod Probl Pharmacopsychiatry 2015; 19:105-17. [PMID: 6408402 DOI: 10.1159/000407507] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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17
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Yoshino M, Tsutsumi K, Kanazawa A. Profiles of embryonic nuclear protein binding to the proximal promoter region of the soybean β-conglycinin α subunit gene. Plant Biol (Stuttg) 2015; 17:147-52. [PMID: 24943483 DOI: 10.1111/plb.12218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 05/02/2014] [Indexed: 06/03/2023]
Abstract
β-Conglycinin, a major component of seed storage protein in soybean, comprises three subunits: α, α' and β. The expression of genes for these subunits is strictly controlled during embryogenesis. The proximal promoter region up to 245 bp upstream of the transcription start site of the α subunit gene sufficiently confers spatial and temporal control of transcription in embryos. Here, the binding profile of nuclear proteins in the proximal promoter region of the α subunit gene was analysed. DNase I footprinting analysis indicated binding of proteins to the RY element and DNA regions including box I, a region conserved in cognate gene promoters. An electrophoretic mobility shift assay (EMSA) using different portions of box I as a probe revealed that multiple portions of box I bind to nuclear proteins. In addition, an EMSA using nuclear proteins extracted from embryos at different developmental stages indicated that the levels of major DNA-protein complexes on box I increased during embryo maturation. These results are consistent with the notion that box I is important for the transcriptional control of seed storage protein genes. Furthermore, the present data suggest that nuclear proteins bind to novel motifs in box I including 5'-TCAATT-3' rather than to predicted cis-regulatory elements.
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Affiliation(s)
- M Yoshino
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
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18
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Nishiura M, Doi K, Taniike A, Matsuki T, Shimazoe K, Mushiake T, Yoshino M, Nagasaka T, Fujimoto Y, Fujioka K, Tanaka T, Kisaki M, Yamaoka H, Matsumoto Y, Wada M. Ion-induced gamma-ray detection of fast ions escaping from fusion plasmas. Rev Sci Instrum 2014; 85:11E804. [PMID: 25430369 DOI: 10.1063/1.4886764] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A 12 × 12 pixel detector has been developed and used in a laboratory experiment for lost fast-ion diagnostics. With gamma rays in the MeV range originating from nuclear reactions (9)Be(α, nγ)(12)C, (9)Be(d, nγ)(12)C, and (12)C(d, pγ)(13)C, a high purity germanium (HPGe) detector measured a fine-energy-resolved spectrum of gamma rays. The HPGe detector enables the survey of background-gamma rays and Doppler-shifted photo peak shapes. In the experiments, the pixel detector produces a gamma-ray image reconstructed from the energy spectrum obtained from total photon counts of irradiation passing through the detector's lead collimator. From gamma-ray image, diagnostics are able to produce an analysis of the fast ion loss onto the first wall in principle.
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Affiliation(s)
- M Nishiura
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
| | - K Doi
- Graduate School of Science and Engineering, Doshisha University, Kyotanabe 610-0321, Japan
| | - A Taniike
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
| | - T Matsuki
- Graduate School of Maritime Sciences, Kobe University, Kobe 658-0022, Japan
| | - K Shimazoe
- Graduate School of Engineering, The University of Tokyo, Tokyo 113-8654, Japan
| | - T Mushiake
- Graduate School of Frontier Sciences, The University of Tokyo, Chiba 277-8561, Japan
| | - M Yoshino
- Furukawa Co. Ltd., Tsukuba, Ibaraki 305-0856, Japan
| | - T Nagasaka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - Y Fujimoto
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - K Fujioka
- Institute of Laser Engineering, Osaka University, Osaka 565-0871, Japan
| | - T Tanaka
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - M Kisaki
- National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
| | - H Yamaoka
- RIKEN SPring-8 center, RIKEN, Sayo, Hyogo 679-5148, Japan
| | - Y Matsumoto
- Tokushima Bunri University, Tokushima 770-8514, Japan
| | - M Wada
- Graduate School of Science and Engineering, Doshisha University, Kyotanabe 610-0321, Japan
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Qiao S, Fan K, Iwashita T, Ichihara M, Yoshino M, Takahashi M. The involvement of reactive oxygen species derived from NADPH oxidase-1 activation on the constitutive tyrosine auto-phosphorylation of RET proteins. Free Radic Res 2014; 48:427-34. [DOI: 10.3109/10715762.2014.884278] [Citation(s) in RCA: 5] [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] [Indexed: 11/13/2022]
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20
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Nakagawa Y, Otsuki M, Yoshino M. Errors in tool use reflecting insufficient recall of the target object for tools. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1944] [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: 11/26/2022]
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21
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Kawabata S, Kouno T, Mori T, Shimoda A, Yoshino M, Ebihara S. The Evaluation of Renal Function in Patients Treated with Reduced-Dose Docetaxel, Cisplatin and 5-Fluorouracil. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32434-0] [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: 11/24/2022] Open
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22
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Terazima E, Yoshino M. Modulatory action of acetylcholine on the Na+-dependent action potentials in Kenyon cells isolated from the mushroom body of the cricket brain. J Insect Physiol 2010; 56:1746-1754. [PMID: 20637212 DOI: 10.1016/j.jinsphys.2010.07.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2009] [Revised: 07/02/2010] [Accepted: 07/06/2010] [Indexed: 05/29/2023]
Abstract
Kenyon cells, intrinsic neurons of the insect mushroom body, have been assumed to be a site of conditioning stimulus (CS) and unconditioned stimulus (US) association in olfactory learning and memory. Acetylcholine (ACh) has been implicated to be a neurotransmitter mediating CS reception in Kenyon cells, causing rapid membrane depolarization via nicotinic ACh receptors. However, the long-term effects of ACh on the membrane excitability of Kenyon cells are not fully understood. In this study, we examined the effects of ACh on Na(+) dependent action potentials (Na(+) spikes) elicited by depolarizing current injection and on net membrane currents under the voltage clamp condition in Kenyon cells isolated from the mushroom body of the cricket Gryllus bimaculatus. Current-clamp studies using amphotericin B perforated-patch recordings showed that freshly dispersed cricket Kenyon cells could produce repetitive Na(+) spikes in response to prolonged depolarizing current injection. Bath application of ACh increased both the instantaneous frequency and the amplitudes of Na(+) spikes. This excitatory action of ACh on Kenyon cells is attenuated by the pre-treatment of the cells with the muscarinic receptor antagonists, atropine and scopolamine, but not by the nicotinic receptor antagonist mecamylamine. Voltage-clamp studies further showed that bath application of ACh caused an increase in net inward currents that are sensitive to TTX, whereas outward currents were decreased by this treatment. These results indicate that in order to mediate CS, ACh may modulate the firing properties of Na(+) spikes of Kenyon cells through muscarinic receptor activation, thus increasing Na conductance and decreasing K conductance.
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Affiliation(s)
- E Terazima
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo 184-8501, Japan
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Kosakai K, Satoh K, Yoshino M. Octopaminergic modulation of the single Ca2+ channel currents in Kenyon cells isolated from the mushroom body of the cricket brain. J Insect Physiol 2008; 54:1479-1486. [PMID: 18761015 DOI: 10.1016/j.jinsphys.2008.08.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2008] [Revised: 07/30/2008] [Accepted: 08/04/2008] [Indexed: 05/26/2023]
Abstract
Octopamine plays an important role in mediating reward signals in olfactory learning and memory formation in insect. However, its target molecules and signaling pathways are still unknown. In this study, we investigated the effects of octopamine on the voltage-activated Ca2+ channels expressed in native Kenyon cells isolated from the mushroom body of the cricket (Gryllus bimaculatus) brain. The cell-attached patch clamp recordings with 100 mM Ba2+ outside showed the presence of dihydropyridine (DHP) sensitive L-type Ca2+ channels with a single channel conductance of approximately 21+/-2 pS (n=12). The open probability (NPo) of single Ca2+ channel currents decreased by about 29+/-7% (n=6) by bath application of 10 microM octopamine. Octopamine-induced decrease in Po was imitated by bath application of 8-Br-cAMP, a membrane-permeable cAMP analog. Pre-treatment of Kenyon cells with the octopamine receptor antagonist phentolamine blocked the inhibitory effect of octopamine on Ca2+ channels. Pre-treatment of Kenyon cells with H-89, a selective inhibitor of cAMP-dependent protein kinase (PKA) attenuated the inhibitory effect of bath applied octopamine on Ca2+ channels. These results indicate that DHP-sensitive L-type Ca2+ channel is a target protein for octopamine and its modulation is mediated via cAMP and PKA-dependent signaling pathways in freshly isolated Kenyon cell in the cricket G. bimaculatus.
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Affiliation(s)
- K Kosakai
- Laboratory of Biology, Tokyo Gakugei University Senior High School, Setagaya, Tokyo 154-0002, Japan
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Yoshida S, Shimada M, Ueno T, Kato A, Yoshino M. Latex hand glove: a safe and convenient device for the endoscopic removal of foreign bodies. Endoscopy 2008; 40 Suppl 2:E195-6. [PMID: 18709613 DOI: 10.1055/s-2008-1077420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S Yoshida
- Department of Gastroenterology, Internal Medicine, TMG Asakadai Central General Hospital, Saitama, Japan.
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25
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Yoshida S, Shimada M, Ueno T, Yoshino M. Exuberant mucosal granulation by a self-expanding metal stent leading to complete closure of esophageal perforation. Endoscopy 2008; 40 Suppl 2:E244-5. [PMID: 18991221 DOI: 10.1055/s-2008-1077526] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S Yoshida
- Department of Gastroenterology, Internal Medicine, TMG Asakadai Central General Hospital, Asaka-shi, Saitama, Japan.
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Yoshida S, Shimada M, Ueno T, Kitamura Y, Matsuzaki S, Nishikubo S, Nagae M, Nakanishi K, Murata J, Yoshino M. Successful endoscopic submucosal dissection of duodenal cancer. Endoscopy 2008; 40 Suppl 2:E132-3. [PMID: 18633861 DOI: 10.1055/s-2007-995685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Affiliation(s)
- S Yoshida
- Department of Gastroenterology, Internal Medicine, TMG Asakadai Central General Hospital, Saitama, Japan
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Yoshino M, Kikuchi Y, Sugiyama A, Osaka T. Preparation of high magnetic flux density CoNiFeB film by electroless deposition for application to magnetic recording devices. Electrochim Acta 2007. [DOI: 10.1016/j.electacta.2007.04.090] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Nakachi K, Furuse J, Kinoshita T, Kawashima M, Ishii H, Suzuki E, Shimizu S, Yoshino M. 3536 POSTER A phase II study of induction chemotherapy with gemcitabine plus S-1 (GS) followed by chemoradiation for locally advanced pancreatic cancer (LAPC). EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71039-x] [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: 11/16/2022] Open
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Matsumoto T, Yoshino M, Uesugi K, Tanaka M. Biphasic change and disuse-mediated regression of canal network structure in cortical bone of growing rats. Bone 2007; 41:239-46. [PMID: 17544983 DOI: 10.1016/j.bone.2007.04.192] [Citation(s) in RCA: 15] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2006] [Revised: 03/29/2007] [Accepted: 04/25/2007] [Indexed: 01/20/2023]
Abstract
The canal network in cortical bone is an indispensable basis of bone vascularity, and its structure changes according to bone growth. Using monochromatic synchrotron radiation microCT (SRmicroCT), we evaluated the structural change of the canal network in growing rat tibiae and the response of this network to disuse. Tibiae were harvested from both hindlimbs of 9- and 14-week-old male Wistar rats subjected to unilateral sciatic neurectomy (SN) at 6 weeks of age (W9, n=8; W14, n=8) and from intact hindlimbs of 6-week-old rats (W6, n=8). Images of distal diaphyseal segments were reconstructed by SRmicroCT with a voxel size of 5.83 mum and then translated into local mineral densities using a calibrated relation between linear absorption coefficients and the concentration of K(2)HPO(4) solution. The canal network was segmented by simple thresholding at a bone mineral density of 0.82 g.cm(-3) and its structural properties were determined. In intact hindlimbs, the canal network showed a biphasic change with growth, as represented by increases followed by decreases in canal volume fraction (Ca.vol.f), the density of canals running longitudinally (Ca.num.d), and the density of canal connections (Ca.con.d): Ca.vol.f=2.2, 3.1, and 1.8%, Ca.num.d=77, 98, and 70 mm(-2), and Ca.con.d=18, 41, and 21 mm(-3) in W6, W9, and W14, respectively. In SN hindlimbs, bone growth deceleration was accompanied by a 16% smaller Ca.vol.f and a 22% smaller Ca.con.d in W9 and a 27% smaller Ca.vol.f, a 12% smaller Ca.num.d, and a 39% smaller Ca.con.d in W14 than those in intact hindlimbs. Furthermore, the canal branching structure became more treelike in SN hindlimbs. The effect of SN on the canal network appeared mainly in the periosteal sector of the anteriolateral cortex in W9 and spread throughout the cortex in W14. These findings will lead to a better understanding of microcirculation in cortical bone growth.
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Affiliation(s)
- T Matsumoto
- Division of Bioengineering, Osaka University Graduate School of Engineering Science, Machikaneyama-cho 1-3, Toyonaka, Osaka 560-8531, Japan. ,jp
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Murakami K, Haneda M, Makino T, Yoshino M. Prooxidant action of furanone compounds: Implication of reactive oxygen species in the metal-dependent strand breaks and the formation of 8-hydroxy-2′-deoxyguanosine in DNA. Food Chem Toxicol 2007; 45:1258-62. [PMID: 17316945 DOI: 10.1016/j.fct.2007.01.006] [Citation(s) in RCA: 12] [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] [Received: 08/29/2005] [Revised: 08/29/2006] [Accepted: 01/11/2007] [Indexed: 10/23/2022]
Abstract
Prooxidant properties of furanone compounds including 2,5-furanone (furaneol, 4-hydroxy-2,5-dimethyl-furan-3-one), 4,5-furanone (4,5-dimethyl-3-hydroxy-2(5H)-furanone) (sotolone) and cyclotene (2-hydroxy-3-methyl-2-cyclopenten-1-one) were analyzed in relation to the metal-reducing activity. Only 2.5-furanone known as a "strawberry or pineapple furanone" inactivated aconitase the most sensitive enzyme to active oxygen in the presence of ferrous sulfate, suggesting the furaneol/iron-mediated generation of reactive oxygen species. 2,5-Furanone caused strand scission of pBR322 DNA in the presence of copper. Treatment of calf thymus DNA with 2,5-furanone plus copper produced 8-hydroxy-2'-deoxyguanosine in DNA. 2,5-Furanone showed a potent copper-reducing activity, and thus, DNA strand breaks and the formation of 8-hydroxy-2'-deoxyguanosine by 2,5-furanone can be initiated by the production of superoxide radical through the reduction of cupric ion to cuprous ion, resulting in the conversion to hydrogen peroxide and hydroxyl radical. However, an isomer and analog of 2,5-furanone, 4,5-furanone and cyclotene, respectively, did not show an inactivation of aconitase, DNA injuries including strand breakage and the formation of 8-hydroxy-2'-deoxyguanosine, and copper-reducing activity. Cytotoxic effect of 2,5-furanone with hydroxyketone structure can be explained by its prooxidant properties: furaneol/transition metal complex generates reactive oxygen species causing the inactivation of aconitase and the formation of DNA base damage by hydroxyl radical.
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Affiliation(s)
- K Murakami
- Department of Biochemistry, Aichi Medical University School of Medicine, Nagakute, Aichi 480-1195, Japan
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Ishii H, Furuse J, Nakachi K, Suzuki E, Shimizu S, Yoshino M, Satake M, Hayashi T. Predictive factors of transcatheter arterial chemoembolization for hepatocellular carcinoma. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.4541] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4541 Background/Aim: Although transcatheter arterial chemoembolization (TACE) has been widely used for the treatment of unresectable hepatocellular carcinoma (HCC), the optimal indication of the TACE has not been fully elucidated. Methods: The treatment outcomes after TACE were analyzed retrospectively to determine predictive factors of anti-cancer effect on HCC. The patient (pts) selection criteria were: 1) admission between 1992 and 2005, 2) diagnosis of fresh HCC, 3) no extrahepatic metastasis and 4) primary treatment with TACE. TACE was performed by selectively introducing a catheter into the hepatic artery and injecting gelatin sponge particles following an emulsion consisting of 2–5 ml of iodized oil (Lipiodol) and 20–50 mg doxorubicin hydrochloride. Lipiodol accumulation in tumors was regarded as an indication of necrosis. We defined complete response (CR) as disappearance or 100% necrosis of all tumors, and partial response (PR) as more than 50% reduction and/or more than 50% necrosis. Results: There were 270 pts who fulfilled the above criteria. According to Japan Integrated Staging, the number of T1, T2, T3 and T4 was 10, 59, 171 and 30, respectively. There were 52 CRs, 113 PRs, 77 who remained SD and 28 who showed PD/NE. The median survival months of CR, PR, SD and PD/NE were 50, 30, 15 and 5, respectively, and there was a significant differences between them. The logistic regression analysis revealed tumor multiplicity and vascular invasion (VI) were significantly associated with the objective response (CR or PR). The response probability of patients with solitary tumor without VI was 85%, that with multiple tumors without VI was 63%, that with solitary tumor with VI was 33% and that with multiple tumors with VI was 16%. The small tumor (<5 cm) was another favorable factor which was significantly associated with CR. Among 231 patients without VI, the CR probability of patients with a solitary tumor <5 cm or >5 cm was 46% or 40%, respectively; although that of those with multiple tumors <5cm or >5cm was 21% or 5%, respectively. Conclusion: TACE is recommended for HCC patients without VI, and is optimally indicated for those with a solitary tumor or those with multiple tumor <5 cm among them. No significant financial relationships to disclose.
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Affiliation(s)
- H. Ishii
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - J. Furuse
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - K. Nakachi
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - E. Suzuki
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - S. Shimizu
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - M. Yoshino
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - M. Satake
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
| | - T. Hayashi
- Natl Cancer Center Hospital East, Kashiwa Chiba, Japan
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Furuse J, Ishii H, Nakajima K, Nakachi K, Suzuki E, Yoshino M. 370 POSTER Phase I study of sorafenib in Japanese patients with hepatocellular carcinoma. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70375-5] [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: 10/23/2022] Open
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Murakami K, Haneda M, Makino T, Yoshino M. Protective effect of NADP-isocitrate dehydrogenase on the paraquat-mediated oxidative inactivation of aconitase in heart mitochondria. Environ Toxicol Pharmacol 2006; 22:148-152. [PMID: 21783702 DOI: 10.1016/j.etap.2006.02.001] [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: 09/22/2005] [Accepted: 02/04/2006] [Indexed: 05/31/2023]
Abstract
Protective role of NADP-isocitrate dehydrogenase in the oxidative inactivation of mitochondrial enzymes was analyzed. Administration of paraquat to the rat inactivated liver mitochondrial enzymes: the aconitase activity decreased to one quarter, and citrate synthase and fumarase to half, whereas cytosolic enzymes were not affected. Activities of heart mitochondrial and cytosolic enzymes were not at all changed in the rat treated with paraquat, but paraquat directly inactivated aconitase in the heart mitochondria isolated from the non-treated rats. The paraquat-dependent inactivation of aconitase was prevented by activating NADP-isocitrate dehydrogenase in the presence of oxidized glutathione. NADP-isocitrate dehydrogenase could regenerate glutathione in isolated heart mitochondria, indicating that paraquat-mediated inactivation depends on the glutathione-regenerating activity by enhanced NADPH supply. Lower NADP-isocitrate dehydrogenase activity in liver mitochondria cannot regenerate reduced glutathione for scavenging reactive oxygen species, resulting in the paraquat-induced oxidative inactivation of mitochondrial enzymes. However, higher activity of NADP-isocitrate dehydrogenase participates in the regeneration of reduced glutathione causing stabilization of enzymes in heart mitochondria.
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Affiliation(s)
- K Murakami
- Department of Biochemistry, Aichi Medical University, School of Medicine, Nagakute, Aichi 480-1195, Japan
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Ishii H, Furuse J, Kinoshita T, Nakachi K, Suzuki E, Yoshino M, Konishi M, Nakagohri T, Takahashi S, Gotohda N. Proposal of a new staging system for hepatocellular carcinoma based on the treatment strategy: An analysis of 1,084 patients. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.4137] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
4137 Background: Although several prognostic models have been proposed for hepatocellular carcinoma (HCC), they are not useful for conducting treatment strategy. Methods: Between July 1992 and May 2005, consecutive 1084 patients (pts) with naïve HCC were treated in our hospital. Based on our treatment strategy, we set our own HCC stage as follows: stage 1; Child-Pugh A or B, N0M0, solitary tumor without vascular invasion (VI), stage 2; Child-Pugh A or B, N0M0, multiple tumors without VI, stage 3; Child-Pugh A or B, N0M0, solitary tumor with VI, stage 4A; Child-Pugh A or B, N0M0, multiple tumors with VI, stage 4B; Child-Pugh A or B, N1 or M1, any T, stage 4C; Child-Pugh C, any TNM. Generally, treatments for stage 4C, 4B, & 4A were observation, chemotherapy trials or aggressive local therapies in selected pts, & hepatic arterial infusion chemotherapy. For the pts with stage 1–3, the priority of treatment options was hepatectomy first, percutaneous ablation (PA) second, and transcatheter arterial chemoembolization third. PA was indicated for 3 or fewer HCC nodules without VI, of which the largest diameter were smaller than 3 cm. Treatment outcomes were retrospectively analyzed according to the above staging system. Results: The overall survival rate was 50% at 3 yrs, 33% at 5 yrs, 24% at 7 yrs & 13% at 10 yrs. The median survival in stage 1, 2, 3, 4A, 4B & 4C was 5.5 yrs (N = 444), 2.9 yrs (N = 397), 0.8 yr (N = 36), 0.5 yr (N = 109), 0.3 yr (N = 76) & 0.2 yr (N = 22), respectively. Most of the definitive local therapy (91% of 371 hepatectomies with curative intent & 99% of 191 PAs) were classified in stage 1 or 2. The prognosis was also well predicted by the other 6 staging systems (Okuda, AJCC, CLIP, JIS, Tokyo and BCLC). However, hepatectomy with curative intent & PA were distributed into a CLIP score of 0–5 & 0–3, respectively, & into a JIS score of 0–4 & 0–3, respectively. Conclusions: The present staging system was simple & predicted prognosis well. Although other scoring systems caused various heterogeneities (hepatic reserve & tumor status) in each score, our staging system consisted of homogenous hepatic reserve & simple tumor status, so it might be useful for conducting treatment plan. Validation study is warranted in other population. No significant financial relationships to disclose.
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Affiliation(s)
- H. Ishii
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - J. Furuse
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - T. Kinoshita
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - K. Nakachi
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - E. Suzuki
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Yoshino
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Konishi
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - T. Nakagohri
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - S. Takahashi
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - N. Gotohda
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
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Blackwell SA, Taylor RV, Gordon I, Ogleby CL, Tanijiri T, Yoshino M, Donald MR, Clement JG. 3-D imaging and quantitative comparison of human dentitions and simulated bite marks. Int J Legal Med 2006; 121:9-17. [PMID: 16391946 DOI: 10.1007/s00414-005-0058-6] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2005] [Accepted: 10/13/2005] [Indexed: 11/29/2022]
Abstract
This study presents a technique developed for 3-D imaging and quantitative comparison of human dentitions and simulated bite marks. A sample of 42 study models and the corresponding bites, made by the same subjects in acrylic dental wax, were digitised by laser scanning. This technique allows image comparison of a 3-D dentition with a 3-D bite mark, eliminating distortion due to perspective as experienced in conventional photography. Cartesian co-ordinates of a series of landmarks were used to describe the dentitions and bite marks, and a matrix was created to compare all possible combinations of matches and non-matches using cross-validation techniques. An algorithm, which estimated the probability of a dentition matching its corresponding bite mark, was developed. A receiver operating characteristic graph illustrated the relationship between values for specificity and sensitivity. This graph also showed for this sample that 15% of non-matches could not be distinguished from the true match, translating to a 15% probability of falsely convicting an innocent person.
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Affiliation(s)
- S A Blackwell
- Oral Anatomy, Medicine and Surgery Unit, School of Dental Science, Faculty of Medicine, Dentistry and Health Sciences, The University of Melbourne, 720 Swanston Street, 3010, Victoria, Australia.
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Matsumoto T, Yoshino M, Uesugi K, Tanaka M. Time response of the canal network in cortical bone to sciatic neurectomy in growing rats: a synchrotron radiation μCT study. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)84833-5] [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: 11/26/2022]
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Nakachi K, Furuse J, Ishii H, Yoshino M. Prognostic factors in gemcitabine refractory advanced pancreatic cancer patients. J Clin Oncol 2005. [DOI: 10.1200/jco.2005.23.16_suppl.4244] [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)
- K. Nakachi
- National Cancer Ctr Hosp East, Kashiwa, Japan
| | - J. Furuse
- National Cancer Ctr Hosp East, Kashiwa, Japan
| | - H. Ishii
- National Cancer Ctr Hosp East, Kashiwa, Japan
| | - M. Yoshino
- National Cancer Ctr Hosp East, Kashiwa, Japan
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39
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Numata T, Yoshino M. Characterization of stretch-activated calcium permeable cation channels in freshly isolated myocytes of the cricket (Gryllus bimaculatus) lateral oviduct. J Insect Physiol 2005; 51:481-8. [PMID: 15893995 DOI: 10.1016/j.jinsphys.2004.10.001] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2004] [Accepted: 10/05/2004] [Indexed: 05/02/2023]
Abstract
Stretch-activated channels (SACs) were investigated in myocytes isolated from the lateral oviduct in cricket Gryllus bimaculatus using the cell-attached or excised inside-out patch clamp technique. Application of both negative and positive pressure (10-100 cm H(2)O) into the patch pipettes induced the unitary channel current openings. The open probability (NPo) of the channel increased when negative pressure applied into the patch pipettes increased. The single channel conductance for this channel was approximately 20 pS with 140 mM Na(+), K(+), or Cs(+) in the patch pipettes and was approximately 13 pS with 100mM Ca(2+) or Ba(2+) in the patch pipettes. External application of Gd(3+), La(3+), Cd(2+) and Zn(2+)inhibited the channel with the IC(50) values of 14, 15, 28, and 18 microM respectively. Interestingly external application of TEA, a specific blocker of K(+) channel, also inhibited this channel with IC(50) value of 8.8mM. These results show for the first time the presence of stretch activated Ca(2+)-permeable nonselective cation channel in myocytes isolated from the cricket lateral oviduct. The physiological significance of this channel in oviposition behavior is discussed.
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Affiliation(s)
- T Numata
- Department of Biology, Tokyo Gakugei University, Nukuikitamachi, Koganei-shi, Tokyo 184-8501, Japan
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40
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Numata T, Yoshino M. Characterization of single L-type Ca2+ channels in myocytes isolated from the cricket lateral oviduct. J Comp Physiol B 2005; 175:257-63. [PMID: 15900506 DOI: 10.1007/s00360-005-0480-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2004] [Revised: 10/22/2004] [Accepted: 11/22/2004] [Indexed: 11/30/2022]
Abstract
The single Ca2+ channel activity was obtained from cell-attached patch recordings with the use of pipettes filled with 100 mM Ba2+ as the charge carrier in myocytes isolated from the lateral oviduct of cricket Gryllus bimaculatus. The following results were obtained. (1) The channel had a unitary conductance of 18 pS. (2) The open time histogram of the channel could be fitted with a single exponential while the closed time histogram could be fitted with the sum of two exponentials, suggesting that there are at least one open state and two closed states for this channel. (3) The open probability of the channel increased with increasing membrane depolarization. (4) The mean current reconstructed by averaging individual current trace responses inactivated slowly and the current-voltage relationship for the peak mean current showed a bell-shaped relation. (5) The dihydropyridine (DHP) Ca2+ antagonist, nifedipine, reduced the mean current by increasing the proportion of "blank" sweeps. On the other hand, the DHP Ca2+ agonist, Bay K 8644, increased the mean current by increasing the mean open-times of the channel. These results confirm a presence of DHP-sensitive L-type Ca2+ channel in myocytes isolated from the lateral oviduct of cricket G. bimaculatus.
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Affiliation(s)
- T Numata
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo, 184-8501, Japan.
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Abstract
Competitive PCR assays were established for the mitochondrial DNA hypervariable region I and the human amelogenin locus. Using these assays, the copy numbers of DNA participating in PCR (amplifiable DNA) were quantified in tissues exposed to different environments. Human ribs, skin and nails were left in three exposure conditions (in the open air, in soil and in water). The amounts of amplifiable DNA in these tissues were quantified during a time period of up to two months. The amount of amplifiable DNA was well preserved in hard tissues (ribs and nails) regardless of the exposure conditions, whereas the soft tissues immersed in water showed a rapid decrease in amplifiable DNA. Strong PCR inhibition was observed in the DNA extracts obtained from buried bones. This phenomenon was clearly identified from an amplification failure of the internal standards in the competitive PCR. A preliminary examination to identify the PCR inhibitor suggested that the soil itself contributed to the inhibition. In addition, the amounts of amplifiable DNA in case samples were also investigated.
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Affiliation(s)
- K Imaizuml
- National Research Institute of Police Science, 6-3-1, Kashiwanoha, Kashiwa, Chiba 277-0882, Japan
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Abstract
We have previously reported that the epidermal growth factor (EGF) family growth factor, epiregulin, is expressed in rat ovarian granulosa cells by induction with pregnant mare serum gonadotropin (PMSG). In this study, we report that amphiregulin, another member of the EGF family, was also induced in the rat ovary by gonadotropin treatment. Northern blot analysis revealed that PMSG treatment induced the expression of both epiregulin and amphiregulin mRNA after 24 h, but the expression then decreased 48 h after treatment. Further treatment with human chorionic gonadotropin (hCG) rapidly induced the expression of both epiregulin and amphiregulin genes and maximal levels were reached 4 h after hCG treatment. A marginal increase in amphiregulin mRNA levels was also observed 6 h after PMSG treatment. In situ hybridization revealed that epiregulin and amphiregulin mRNAs were localized in the granulosa cells of large antral follicles. These spatio-temporal expression patterns were similar to those of cyclo-oxygenase-2 (COX-2) and progesterone receptor (PR). In adult cycling rats, epiregulin and amphiregulin were strongly induced at 1800 and 2000 h on proestrus coinciding with the preovulatory LH surge. An in situ hybridization study also showed that epiregulin and amphiregulin mRNAs were detectable in the granulosa cells of preovulatory ovarian follicles at 2000 h on proestrus, where transcripts of COX-2 and PR were co-localized with those of epiregulin and amphiregulin. These observations suggested that the EGF family members, epiregulin and amphiregulin, may play a role in the ovulatory process of cycling rats as well as in the induction of ovulation in immature rats.
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Affiliation(s)
- T Sekiguchi
- Department of Biochemistry, Faculty of Medical Sciences, University of Fukui, 23 Shimoaizuki, Matsuoka, Fukui 910-1193, Japan
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43
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Nagase M, Furuse J, Ishii H, Kawashima M, Ogino T, Yoshino M. A phase I study of hypofractionated radiotherapy followed by systemic chemotherapy of full-dose gemcitabine in patients with unresectable locally advanced pancreatic carcinoma. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4221] [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)
- M. Nagase
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - J. Furuse
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - H. Ishii
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Kawashima
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - T. Ogino
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Yoshino
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
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44
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Furuse J, Ishii H, Kawashima M, Nagase M, Ogino T, Yoshino M. A pilot study of external beam radiotherapy for unresectable primary liver cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4220] [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)
- J. Furuse
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - H. Ishii
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Kawashima
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Nagase
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - T. Ogino
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Yoshino
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
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45
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Ishii H, Furuse J, Nagase M, Yoshino M, Takahashi S, Nakagohri T, Konishi M, Kinoshita T. Prognosis of patients with metastatic hepatocellular carcinoma (HCC). J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.4127] [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. Ishii
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - J. Furuse
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Nagase
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Yoshino
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - S. Takahashi
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - T. Nakagohri
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - M. Konishi
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
| | - T. Kinoshita
- National Cancer Center Hospital East, Kashiwa, Chiba, Japan
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46
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Abstract
Quantitative analysis of facial volume is important in the assessment of facial swelling. Previous research has demonstrated that the Fiore trade mark light-structured 3-D range camera is a rapid, non-invasive, and safe imaging technology for the quantitative analysis of facial morphology. The development of the Rugle-3D trade mark volumetric measurement software programme has allowed for the development of a powerful imaging and measurement system. This study aimed to determine the accuracy and reproducibility of Fiore trade mark by measuring simulated facial swelling. A model involving 20 human subjects was devised to simulate facial swelling for image acquisition and measurement in order to assess the accuracy and reproducibility of the device. A systematic error of 1.25% and reproducibility of 3.27% was determined for the imaging system. It is concluded that Fiore trade mark is an accurate and reproducible technology that is sensitive and would be applicable to clinical studies of facial swelling.
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Affiliation(s)
- E Yip
- School of Dental Science, The University of Melbourne, Australia
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47
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Kubota T, Wakui K, Nakamura T, Ohashi H, Watanabe Y, Yoshino M, Kida T, Okamoto N, Matsumura M, Muroya K, Ogata T, Goto Y, Fukushima Y. The proportion of cells with functional X disomy is associated with the severity of mental retardation in mosaic ring X Turner syndrome females. Cytogenet Genome Res 2004; 99:276-84. [PMID: 12900575 DOI: 10.1159/000071604] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2003] [Accepted: 02/20/2003] [Indexed: 11/19/2022] Open
Abstract
Turner syndrome females (45,X) do not have mental retardation (MR), whereas some mosaic ring X Turner syndrome females, with 45,X/46,X,r(X), have severe MR. The MR is believed to be caused by a failure of X chromosome inactivation (XCI) of the small ring X chromosome, which leads to functional X disomy (FXD), To explore this hypothesis, we examined the proportion of FXD cells in the peripheral blood of four ring X Turner syndrome females with various levels of MR, using two newly developed XCI assays based on DNA methylation of X-linked genes. As a result, the two patients with extremely severe MR showed complete FXD patterns, whereas the remaining two patients with relatively milder MR showed partial FXD patterns. These results indicate that the proportion of FXD cells may be associated with the severity of MR in mosaic ring X Turner syndrome females, although this association should be confirmed by examining brain cells during development. One of the cases with severe MR and a complete FXD pattern neither lacked the XIST gene nor had uniparental X isodisomy, and we discuss the mechanism of the failure of XCI in this case.
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MESH Headings
- Child
- Child, Preschool
- Chromosomes, Human, X/genetics
- DNA Methylation
- Dosage Compensation, Genetic
- Female
- Genotype
- Humans
- In Situ Hybridization, Fluorescence
- Karyotyping
- Mental Retardation, X-Linked/genetics
- Mental Retardation, X-Linked/pathology
- Mosaicism
- Promoter Regions, Genetic/genetics
- RNA, Long Noncoding
- RNA, Untranslated/genetics
- Ring Chromosomes
- Severity of Illness Index
- Sex Chromosome Aberrations
- Turner Syndrome/genetics
- Turner Syndrome/pathology
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Affiliation(s)
- T Kubota
- Department of Medical Genetics, Shinshu University School of Medicine, Nagano, Japan.
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48
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Mutoh H, Yoshino M. L-type Ca 2+ channel and Ca 2+ -permeable nonselective cation channel as a Ca 2+ conducting pathway in myocytes isolated from the cricket lateral oviduct. J Comp Physiol B 2004; 174:21-8. [PMID: 14530996 DOI: 10.1007/s00360-003-0385-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2003] [Indexed: 10/26/2022]
Abstract
The Ca2+-conducting pathway of myocytes isolated from the cricket lateral oviduct was investigated by means of the whole-cell patch clamp technique. In voltage-clamp configuration, two types of whole cell inward currents were identified. One was voltage-dependent, initially activated at -40 mV and reaching a maximum at 10 mV with the use of 140 mM Cs2+-aspartate in the patch pipette and normal saline in the bath solution. Replacement of the external Ca2+ with Ba2+ slowed the current decay. Increasing the external Ca2+ or Ba2+ concentration increased the amplitude of the inward current and the current-voltage (I-V) relationship was shifted as expected from a screening effect on negative surface charges. The inward current could be carried by Na+ in the absence of extracellular Ca2+. Current carried by Na+ (INa) was almost completely blocked by the dihydropyridine Ca2+ channel antagonist, nifedipine, suggesting that the INa is through voltage-dependent L-type Ca2+ channels. The other inward current is voltage-independent and its I-V relationship was linear between -100 mV to 0 mV with a slight inward rectification at more hyperpolarizing membrane potentials when 140 mM Cs+-aspartate and 140 mM Na+-gluconate were used in the patch pipette and in the bath solution, respectively. A similar current was observed even when the external Na+ was replaced with an equimolar amount of K+ or Cs+, or 50 mM Ca2+ or Ba2+. When the osmolarity of the bath solution was reduced by removing mannitol from the bath solution, the inward current became larger at negative potentials. The I-V relationship for the current evoked by the hypotonic solution also showed a linear relationship between -100 mV to 0 mV. Bath application of Gd3+ (10 microM) decreased the inward current activated by membrane hyperpolarization. These results clearly indicate that the majority of current activated by a membrane hyperpolarization is through a stretch-activated Ca2+-permeable nonselective cation channel (NSCC). Here, for the first time, we have identified voltage-dependent L-type Ca2+ channel and stretch-activated Ca2+-permeable NSCCs from enzymatically isolated muscle cells of the cricket using the whole-cell patch clamp recording technique.
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Affiliation(s)
- H Mutoh
- Department of Biology, Tokyo Gakugei University, Koganei-shi, 184-8501 Tokyo, Japan
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49
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Furuse J, Nagase M, Ishii H, Yoshino M. Contrast enhancement patterns of hepatic tumours during the vascular phase using coded harmonic imaging and Levovist to differentiate hepatocellular carcinoma from other focal lesions. Br J Radiol 2003; 76:385-92. [PMID: 12814924 DOI: 10.1259/bjr/14206699] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [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: 01/24/2023] Open
Abstract
The purpose of the study was to assess contrast enhancement patterns of hepatic tumours during the vascular phase using contrast-enhanced ultrasound and Levovist to differentiate hepatocellular carcinoma from other hepatic tumours. 89 hepatic tumours in 82 consecutive patients were evaluated using coded harmonic ultrasound imaging. The procedure used a phase inversion harmonic technique and coded technology. We observed images for 2 min from the beginning of the administration as the vascular phase using continuous transmission and intermittent transmissions of 1 s or 2 s. The contrast agent Levovist was administered intravenously as a bolus infusion of 2.5 g. Tumour vessels with flow spreading into the tumour and/or homogeneously stained hyperechoic images were observed in 34 of the 41 hepatocellular carcinomas (sensitivity, 82.9%; specificity, 93.8%). Peripheral enhancements were characteristic of intrahepatic cholangiocarcinoma and metastatic hepatic tumours (sensitivity, 60.0% and 83.3%; specificity, 65.5% and 76.4%, respectively). Pooling at the periphery or throughout the tumour was apparent only in haemangioma (sensitivity, 76.5%; specificity, 100%). A tortuous feeding artery and spoke-like vascularization were evident only in the two focal nodular hyperplasias. Contrast-enhanced ultrasound using coded harmonic ultrasound imaging and Levovist provided detailed information about tumour vascularity and contrast enhancement patterns in hepatic tumours.
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Affiliation(s)
- J Furuse
- Division of Hepatobiliary Pancreatic Medical Oncology, National Cancer Centre Hospital East, 6-5-1, Kashiwanoha, Kashiwa, Chiba, 277-8577, Japan
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Yoshino M. Olefin/paraffin separation performance of carbonized membranes derived from an asymmetric hollow fiber membrane of 6FDA/BPDA–DDBT copolyimide. J Memb Sci 2003. [DOI: 10.1016/s0376-7388(02)00611-7] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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