1
|
Tanaka S, Yoshii Y, Hattori T. Lewis Acid-Mediated Friedel-Crafts-Type Formylation of Alkenes with Dichloromethyl Methyl Ether in the Presence of Pyridines. J Org Chem 2024; 89:3546-3551. [PMID: 38348870 DOI: 10.1021/acs.joc.3c02059] [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: 03/02/2024]
Abstract
Various alkenes are formylated with dichloromethyl methyl ether (MOMCl2) by the combined use of SnCl4/2,6-dibromopyridine (B1) or AgOTf/pyridine (B4) via Friedel-Crafts-type reaction. The former reagent combination is mainly applied to α,α-diarylalkenes, while the latter one is applied not only to arylalkenes but also to some alkylalkenes. Vinyl aldehydes are exclusively obtained from alkenes that can possibly afford both allyl and vinyl aldehydes.
Collapse
Affiliation(s)
- Shinya Tanaka
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
- Environment Conservation Research Institute, Tohoku University, 6-6-04 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yuji Yoshii
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Tetsutaro Hattori
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| |
Collapse
|
2
|
Matsuya Y, Yoshii Y, Kusumoto T, Akamatsu K, Hirata Y, Sato T, Kai T. A step-by-step simulation code for estimating yields of water radiolysis species based on electron track-structure mode in the PHITS code. Phys Med Biol 2024; 69:035005. [PMID: 38157551 DOI: 10.1088/1361-6560/ad199b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Accepted: 12/29/2023] [Indexed: 01/03/2024]
Abstract
Objective. Time-dependent yields of chemical products resulting from water radiolysis play a great role in evaluating DNA damage response after exposure to ionizing radiation. Particle and Heavy Ion Transport code System (PHITS) is a general-purpose Monte Carlo simulation code for radiation transport, which simulates atomic interactions originating from discrete energy levels of ionizations and electronic excitations as well as molecular excitations as physical stages. However, no chemical code for simulating water radiolysis products exists in the PHITS package.Approach.Here, we developed a chemical simulation code dedicated to the PHITS code, hereafter calledPHITS-Chemcode, which enables the calculation of theGvalues of water radiolysis species (•OH, eaq-, H2, H2O2etc) by electron beams.Main results.The estimatedGvalues during 1 μs are in agreement with the experimental ones and other simulations. ThisPHITS-Chemcode also simulates the radiolysis in the presence of OH radical scavengers, such as tris(hydroxymethyl)aminomethane and dimethyl sulfoxide. Thank to this feature, the contributions of direct and indirect effects on DNA damage induction under various scavenging capacities can be analyzed.Significance.This chemical code coupled with PHITS could contribute to elucidating the mechanism of radiation effects by connecting physical, physicochemical, and chemical processes.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
- Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan
| | - Yuji Yoshii
- Department of Radiological Technology, Faculty of Health Sciences, Hokkaido University of Science, Maeda 7-15, Teine-ku, Sapporo 006-8585, Japan
| | - Tamon Kusumoto
- National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, 263-8555 Chiba, Japan
| | - Ken Akamatsu
- Institute for Quantum life Science, Quantum Life and Medical Science Directorate, National Institutes of Quantum and Radiological Science and Technology (QST), 8-1-7 Umemidai, Kizugawa-shi, Kyoto, 619-0215, Japan
| | - Yuho Hirata
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| | - Tatsuhiko Sato
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| | - Takeshi Kai
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan
| |
Collapse
|
3
|
Matsumoto Y, Yoshii Y, Ikutomo A, Yagi M, Nishimura M, Kawasaki Y, Sarafian A, Kim H, Roye DP, Matsumoto H. Improvement in a post-stroke pediatric patient with hemiplegia: Use of a hand-arm bimanual intensive therapy with hybrid assistive limb. Brain Dev 2024; 46:68-72. [PMID: 37652813 DOI: 10.1016/j.braindev.2023.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 07/04/2023] [Accepted: 08/11/2023] [Indexed: 09/02/2023]
Abstract
BACKGROUND Pediatric stroke is a rare medical condition that often leads to long-lasting motor and cognitive impairments. Although therapies for adults after a stroke are well described, treatments for motor deficits following a pediatric stroke are yet to be investigated. We report a case of pediatric stroke in the chronic phase, in which a combination of novel treatments resulted in a significant improvement in physical function. CASE REPORT A seven-year-old girl with a left hemispheric cerebral infarction lost almost all right upper extremity motor function. Following onabotulinumtoxinA treatment, she underwent hand-arm bimanual intensive therapy augmented with a hybrid assistive limb for 90 h over 15 days. Evaluation after the training revealed significant improvements in physical function, daily activities, and occupational performance. CONCLUSIONS This report highlights the importance of innovative combinations of techniques in the treatment of pediatric stroke.
Collapse
Affiliation(s)
- Yoko Matsumoto
- NikoNiko House Medical and Welfare Center, Kobe, Japan; Department of Public Health and Health Science, Kobe University Graduate School of Health Sciences, Kobe, Japan; Tokyo Metropolitan Fuchu Rehabilitation Center, Tokyo, Japan.
| | - Yuji Yoshii
- PorePore-no-Ki, Children Development Support Center, Himeji, Japan
| | - Akiyo Ikutomo
- NikoNiko House Medical and Welfare Center, Kobe, Japan
| | - Mariko Yagi
- NikoNiko House Medical and Welfare Center, Kobe, Japan; Department of Childhood Development and Education, Faculty of Human Science, Konan Women's University, Kobe, Japan
| | - Mio Nishimura
- NikoNiko House Medical and Welfare Center, Kobe, Japan
| | - Yoko Kawasaki
- NikoNiko House Medical and Welfare Center, Kobe, Japan
| | | | - Heakyung Kim
- Physical Medicine & Rehabilitation, The University of Texas Southwestern Medical Center, TX, USA
| | - David P Roye
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, MA, USA
| | - Hiroko Matsumoto
- Department of Orthopaedic Surgery and Sports Medicine, Boston Children's Hospital, MA, USA; Department of Orthopaedic Surgery, Harvard Medical School, MA, USA
| |
Collapse
|
4
|
Yoshii Y, Jimbo K, Hashiguchi H, Shikata S, Ogawa A, Watase C, Shiino S, Murata T, Yoshida M, Takayama S, Suto A. P173 Should positive surgical margin involvement of in situ carcinoma of invasive breast cancer after breast conserving surgery be treated with additional resection? Breast 2023. [DOI: 10.1016/s0960-9776(23)00290-4] [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: 03/17/2023] Open
|
5
|
Yachi Y, Kai T, Matsuya Y, Hirata Y, Yoshii Y, Date H. Author Correction: Impact of the Lorentz force on electron track structure and early DNA damage yields in magnetic resonance-guided radiotherapy. Sci Rep 2023; 13:2239. [PMID: 36755052 PMCID: PMC9908917 DOI: 10.1038/s41598-023-29348-8] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Affiliation(s)
- Yoshie Yachi
- grid.39158.360000 0001 2173 7691Graduate School of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido 060-0812 Japan
| | - Takeshi Kai
- grid.20256.330000 0001 0372 1485Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki 319-1195 Japan
| | - Yusuke Matsuya
- Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan. .,Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan.
| | - Yuho Hirata
- grid.20256.330000 0001 0372 1485Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki 319-1195 Japan
| | - Yuji Yoshii
- grid.39158.360000 0001 2173 7691Central Institute of Isotope Science, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido 060-0815 Japan ,grid.39158.360000 0001 2173 7691Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido 060-0812 Japan
| | - Hiroyuki Date
- grid.39158.360000 0001 2173 7691Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido 060-0812 Japan
| |
Collapse
|
6
|
Yachi Y, Matsuya Y, Yoshii Y, Fukunaga H, Date H, Kai T. An Analytical Method for Quantifying the Yields of DNA Double-Strand Breaks Coupled with Strand Breaks by γ-H2AX Focus Formation Assay Based on Track-Structure Simulation. Int J Mol Sci 2023; 24:ijms24021386. [PMID: 36674901 PMCID: PMC9864015 DOI: 10.3390/ijms24021386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/27/2022] [Accepted: 01/06/2023] [Indexed: 01/13/2023] Open
Abstract
Complex DNA double-strand break (DSB), which is defined as a DSB coupled with additional strand breaks within 10 bp in this study, induced after ionizing radiation or X-rays, is recognized as fatal damage which can induce cell death with a certain probability. In general, a DSB site inside the nucleus of live cells can be experimentally detected using the γ-H2AX focus formation assay. DSB complexity is believed to be detected by analyzing the focus size using such an assay. However, the relationship between focus size and DSB complexity remains uncertain. In this study, using Monte Carlo (MC) track-structure simulation codes, i.e., an in-house WLTrack code and a Particle and Heavy Ion Transport code System (PHITS), we developed an analytical method for qualifying the DSB complexity induced by photon irradiation from the microscopic image of γ-H2AX foci. First, assuming that events (i.e., ionization and excitation) potentially induce DNA strand breaks, we scored the number of events in a water cube (5.03 × 5.03 × 5.03 nm3) along electron tracks. Second, we obtained the relationship between the number of events and the foci size experimentally measured by the γ-H2AX focus formation assay. Third, using this relationship, we evaluated the degree of DSB complexity induced after photon irradiation for various X-ray spectra using the foci size, and the experimental DSB complexity was compared to the results estimated by the well-verified DNA damage estimation model in the PHITS code. The number of events in a water cube was found to be proportional to foci size, suggesting that the number of events intrinsically related to DSB complexity at the DNA scale. The developed method was applicable to focus data measured for various X-ray spectral situations (i.e., diagnostic kV X-rays and therapeutic MV X-rays). This method would contribute to a precise understanding of the early biological impacts of photon irradiation by means of the γ-H2AX focus formation assay.
Collapse
Affiliation(s)
- Yoshie Yachi
- Graduate School of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Yusuke Matsuya
- Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo 060-0812, Japan
- Japan Atomic Energy Agency (JAEA), Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, 2-4 Shirakata, Tokai, Naka-gun 319-1195, Japan
- Correspondence: or (Y.M.); (T.K.)
| | - Yuji Yoshii
- Central Institute of Isotope Science, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo 060-0815, Japan
| | - Hisanori Fukunaga
- Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Takeshi Kai
- Japan Atomic Energy Agency (JAEA), Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, 2-4 Shirakata, Tokai, Naka-gun 319-1195, Japan
- Correspondence: or (Y.M.); (T.K.)
| |
Collapse
|
7
|
Matsuya Y, Kai T, Parisi A, Yoshii Y, Sato T. Application of a simple DNA damage model developed for electrons to proton irradiation. Phys Med Biol 2022; 67. [DOI: 10.1088/1361-6560/ac9a20] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Accepted: 10/13/2022] [Indexed: 01/18/2023]
Abstract
Abstract
Proton beam therapy allows irradiating tumor volumes with reduced side effects on normal tissues with respect to conventional x-ray radiotherapy. Biological effects such as cell killing after proton beam irradiations depend on the proton kinetic energy, which is intrinsically related to early DNA damage induction. As such, DNA damage estimation based on Monte Carlo simulations is a research topic of worldwide interest. Such simulation is a mean of investigating the mechanisms of DNA strand break formations. However, past modellings considering chemical processes and DNA structures require long calculation times. Particle and heavy ion transport system (PHITS) is one of the general-purpose Monte Carlo codes that can simulate track structure of protons, meanwhile cannot handle radical dynamics simulation in liquid water. It also includes a simple model enabling the efficient estimation of DNA damage yields only from the spatial distribution of ionizations and excitations without DNA geometry, which was originally developed for electron track-structure simulations. In this study, we investigated the potential application of the model to protons without any modification. The yields of single-strand breaks, double-strand breaks (DSBs) and the complex DSBs were assessed as functions of the proton kinetic energy. The PHITS-based estimation showed that the DSB yields increased as the linear energy transfer (LET) increased, and reproduced the experimental and simulated yields of various DNA damage types induced by protons with LET up to about 30 keV μm−1. These results suggest that the current DNA damage model implemented in PHITS is sufficient for estimating DNA lesion yields induced after protons irradiation except at very low energies (below 1 MeV). This model contributes to evaluating early biological impacts in radiation therapy.
Collapse
|
8
|
Yachi Y, Kai T, Matsuya Y, Hirata Y, Yoshii Y, Date H. Impact of the Lorentz force on electron track structure and early DNA damage yields in magnetic resonance-guided radiotherapy. Sci Rep 2022; 12:16412. [PMID: 36180476 PMCID: PMC9525613 DOI: 10.1038/s41598-022-18138-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 01/11/2022] [Accepted: 08/05/2022] [Indexed: 11/13/2022] Open
Abstract
Magnetic resonance-guided radiotherapy (MRgRT) has been developed and installed in recent decades for external radiotherapy in several clinical facilities. Lorentz forces modulate dose distribution by charged particles in MRgRT; however, the impact of Lorentz forces on low-energy electron track structure and early DNA damage induction remain unclear. In this study, we estimated features of electron track structure and biological effects in a static magnetic field (SMF) using a general-purpose Monte Carlo code, particle and heavy ion transport code system (PHITS) that enables us to simulate low-energy electrons down to 1 meV by track-structure mode. The macroscopic dose distributions by electrons above approximately 300 keV initial energy in liquid water are changed by both perpendicular and parallel SMFs against the incident direction, indicating that the Lorentz force plays an important role in calculating dose within tumours. Meanwhile, DNA damage estimation based on the spatial patterns of atomic interactions indicates that the initial yield of DNA double-strand breaks (DSBs) is independent of the SMF intensity. The DSB induction is predominantly attributed to the secondary electrons below a few tens of eV, of which energy deposition patterns are not considerably affected by the Lorentz force. Our simulation study suggests that treatment planning for MRgRT can be made with consideration of only changed dose distribution.
Collapse
Affiliation(s)
- Yoshie Yachi
- grid.39158.360000 0001 2173 7691Graduate School of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido 060-0812 Japan
| | - Takeshi Kai
- grid.20256.330000 0001 0372 1485Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki 319-1195 Japan
| | - Yusuke Matsuya
- Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki, 319-1195, Japan. .,Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido, 060-0812, Japan.
| | - Yuho Hirata
- grid.20256.330000 0001 0372 1485Nuclear Science and Engineering Centre, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai, Ibaraki 319-1195 Japan
| | - Yuji Yoshii
- grid.39158.360000 0001 2173 7691Central Institute of Isotope Science, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido 060-0815 Japan ,grid.39158.360000 0001 2173 7691Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido 060-0812 Japan
| | - Hiroyuki Date
- grid.39158.360000 0001 2173 7691Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, Hokkaido 060-0812 Japan
| |
Collapse
|
9
|
Matsuya Y, Kai T, Sato T, Ogawa T, Hirata Y, Yoshii Y, Parisi A, Liamsuwan T. Track-structure modes in particle and heavy ion transport code system (PHITS): application to radiobiological research. Int J Radiat Biol 2021; 98:148-157. [PMID: 34930091 DOI: 10.1080/09553002.2022.2013572] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
PURPOSE In radiation physics, Monte Carlo radiation transport simulations are powerful tools to evaluate the cellular responses after irradiation. When investigating such radiation-induced biological effects, it is essential to perform track structure simulations by explicitly considering each atomic interaction in liquid water at the sub-cellular and DNA scales. The Particle and Heavy-Ion Transport code System (PHITS) is a Monte Carlo code which enables to calculate track structure at DNA scale by employing the track-structure modes for electrons, protons and carbon ions. In this paper, we review the recent development status and future prospects of the track-structure modes in the PHITS code. CONCLUSIONS To date, the physical features of these modes have been verified using the available experimental data and Monte Carlo simulation results reported in literature. These track-structure modes can be used for calculating microdosimetric distributions to estimate cell survival and for estimating initial DNA damage yields. The use of PHITS track-structure mode is expected not only to clarify the underlying mechanisms of radiation effects but also to predict curative effects in radiation therapy. The results of PHITS simulations coupled with biophysical models will contribute to the radiobiological studies by precisely predicting radiation-induced biological effects based on the Monte Carlo approach.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Japan
| | - Takeshi Kai
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Japan
| | - Tatsuhiko Sato
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Japan
| | - Tatsuhiko Ogawa
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Japan
| | - Yuho Hirata
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Tokai, Japan
| | - Yuji Yoshii
- Central Institute of Isotope Science, Hokkaido University, Sapporo, Japan
| | - Alessio Parisi
- Department of Radiation Oncology, Mayo Clinic, Jacksonville, Florida
| | - Thiansin Liamsuwan
- Princess Srisavangavadhana College of Medicine, Chulabhorn Royal Academy, Bangkok, Thailand
| |
Collapse
|
10
|
Matsuya Y, Nakano T, Kai T, Shikazono N, Akamatsu K, Yoshii Y, Sato T. A Simplified Cluster Analysis of Electron Track Structure for Estimating Complex DNA Damage Yields. Int J Mol Sci 2020; 21:ijms21051701. [PMID: 32131419 PMCID: PMC7084883 DOI: 10.3390/ijms21051701] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 02/27/2020] [Accepted: 02/28/2020] [Indexed: 01/04/2023] Open
Abstract
Complex DNA damage, defined as at least two vicinal lesions within 10-20 base pairs (bp), induced after exposure to ionizing radiation, is recognized as fatal damage to human tissue. Due to the difficulty of directly measuring the aggregation of DNA damage at the nano-meter scale, many cluster analyses of inelastic interactions based on Monte Carlo simulation for radiation track structure in liquid water have been conducted to evaluate DNA damage. Meanwhile, the experimental technique to detect complex DNA damage has evolved in recent decades, so both approaches with simulation and experiment get used for investigating complex DNA damage. During this study, we propose a simplified cluster analysis of ionization and electronic excitation events within 10 bp based on track structure for estimating complex DNA damage yields for electron and X-ray irradiations. We then compare the computational results with the experimental complex DNA damage coupled with base damage (BD) measured by enzymatic cleavage and atomic force microscopy (AFM). The computational results agree well with experimental fractions of complex damage yields, i.e., single and double strand breaks (SSBs, DSBs) and complex BD, when the yield ratio of BD/SSB is assumed to be 1.3. Considering the comparison of complex DSB yields, i.e., DSB + BD and DSB + 2BD, between simulation and experimental data, we find that the aggregation degree of the events along electron tracks reflects the complexity of induced DNA damage, showing 43.5% of DSB induced after 70 kVp X-ray irradiation can be classified as a complex form coupled with BD. The present simulation enables us to quantify the type of complex damage which cannot be measured through in vitro experiments and helps us to interpret the experimental detection efficiency for complex BD measured by AFM. This simple model for estimating complex DNA damage yields contributes to the precise understanding of the DNA damage complexity induced after X-ray and electron irradiations.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
- Correspondence:
| | - Toshiaki Nakano
- Department of Quantum life Science, Quantum Beam Science Research Directorate, National Institutes of Quantum and Radiological Science and Technology, 8-1-7 Umemidai, Kizugawa-shi, Kyoto 619-0215, Japan
| | - Takeshi Kai
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
| | - Naoya Shikazono
- Department of Quantum life Science, Quantum Beam Science Research Directorate, National Institutes of Quantum and Radiological Science and Technology, 8-1-7 Umemidai, Kizugawa-shi, Kyoto 619-0215, Japan
| | - Ken Akamatsu
- Department of Quantum life Science, Quantum Beam Science Research Directorate, National Institutes of Quantum and Radiological Science and Technology, 8-1-7 Umemidai, Kizugawa-shi, Kyoto 619-0215, Japan
| | - Yuji Yoshii
- Central Institute of Isotope Science, Hokkaido University, Kita-15 Nishi-7, Kita-ku, Sapporo, Hokkaido 060-0815, Japan
| | - Tatsuhiko Sato
- Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Ibaraki 319-1195, Japan
| |
Collapse
|
11
|
Affiliation(s)
- Shinya Tanaka
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
- Environment Conservation Center, Tohoku University, 6-6-04 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Tsukasa Kunisawa
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Yuji Yoshii
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| | - Tetsutaro Hattori
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aramaki-Aoba, Aoba-ku, Sendai 980-8579, Japan
| |
Collapse
|
12
|
Matsuya Y, McMahon SJ, Ghita M, Yoshii Y, Sato T, Date H, Prise KM. Intensity Modulated Radiation Fields Induce Protective Effects and Reduce Importance of Dose-Rate Effects. Sci Rep 2019; 9:9483. [PMID: 31263149 PMCID: PMC6603191 DOI: 10.1038/s41598-019-45960-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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: 02/13/2019] [Accepted: 06/19/2019] [Indexed: 11/09/2022] Open
Abstract
In advanced radiotherapy, intensity modulated radiation fields and complex dose-delivery are utilized to prescribe higher doses to tumours. Here, we investigated the impact of modulated radiation fields on radio-sensitivity and cell recovery during dose delivery. We generated experimental survival data after single-dose, split-dose and fractionated irradiation in normal human skin fibroblast cells (AGO1522) and human prostate cancer cells (DU145). The dose was delivered to either 50% of the area of a T25 flask containing the cells (half-field) or 100% of the flask (uniform-field). We also modelled the impact of dose-rate effects and intercellular signalling on cell-killing. Applying the model to the survival data, it is found that (i) in-field cell survival under half-field exposure is higher than uniform-field exposure for the same delivered dose; (ii) the importance of sub-lethal damage repair (SLDR) in AGO1522 cells is reduced under half-field exposure; (iii) the yield of initial DNA lesions measured with half-field exposure is smaller than that with uniform-field exposure. These results suggest that increased cell survival under half-field exposure is predominantly attributed not to rescue effects (increased SLDR) but protective effects (reduced induction of initial DNA lesions). In support of these protective effects, the reduced DNA damage leads to modulation of cell-cycle dynamics, i.e., less G1 arrest 6 h after irradiation. These findings provide a new understanding of the impact of dose-rate effects and protective effects measured after modulated field irradiation.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Japan Atomic Energy Agency (JAEA), Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, 2-4 Shirakata, Tokai, 319-1195, Ibaraki, Japan. .,Graduate School of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, 060-0812, Hokkaido, Japan.
| | - Stephen J McMahon
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, BT7 9AE, Belfast, UK
| | - Mihaela Ghita
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, BT7 9AE, Belfast, UK
| | - Yuji Yoshii
- Biological Research, Education and Instrumentation Center, Sapporo Medical University, Minami-1 Nishi-17, Chuo-ku, Sapporo, 060-8556, Hokkaido, Japan
| | - Tatsuhiko Sato
- Japan Atomic Energy Agency (JAEA), Nuclear Science and Engineering Center, Research Group for Radiation Transport Analysis, 2-4 Shirakata, Tokai, 319-1195, Ibaraki, Japan
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Kita-12 Nishi-5, Kita-ku, Sapporo, 060-0812, Hokkaido, Japan
| | - Kevin M Prise
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, BT7 9AE, Belfast, UK
| |
Collapse
|
13
|
Nakatani Y, Ueda S, Tsuboguchi Y, Yoshii Y, Akiyoshi K, Tsuya A, Okazaki S, Tokunaga S, Daga H. TAS-102 followed by regorafenib or the reverse sequence in advanced colorectal cancer. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy431.025] [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
|
14
|
Pletser D, Ohashi T, Yoshii Y, Lee W. Temperature dependent volatilisation behaviour of Cs from two commercial adsorbents used at Fukushima measured using novel experimental apparatus. Progress in Nuclear Energy 2018. [DOI: 10.1016/j.pnucene.2018.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
15
|
Matsuya Y, McMahon SJ, Tsutsumi K, Sasaki K, Okuyama G, Yoshii Y, Mori R, Oikawa J, Prise KM, Date H. Investigation of dose-rate effects and cell-cycle distribution under protracted exposure to ionizing radiation for various dose-rates. Sci Rep 2018; 8:8287. [PMID: 29844494 PMCID: PMC5974424 DOI: 10.1038/s41598-018-26556-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 05/04/2018] [Indexed: 01/04/2023] Open
Abstract
During exposure to ionizing radiation, sub-lethal damage repair (SLDR) competes with DNA damage induction in cultured cells. By virtue of SLDR, cell survival increases with decrease of dose-rate, so-called dose-rate effects (DREs). Here, we focused on a wide dose-rate range and investigated the change of cell-cycle distribution during X-ray protracted exposure and dose-response curves via hybrid analysis with a combination of in vitro experiments and mathematical modelling. In the course of flow-cytometric cell-cycle analysis and clonogenic assays, we found the following responses in CHO-K1 cells: (1) The fraction of cells in S phase gradually increases during 6 h exposure at 3.0 Gy/h, which leads to radio-resistance. (2) Slight cell accumulation in S and G2/M phases is observed after exposure at 6.0 Gy/h for more than 10 hours. This suggests that an increase of SLDR rate for cells in S phase during irradiation may be a reproducible factor to describe changes in the dose-response curve at dose-rates of 3.0 and 6.0 Gy/h. By re-evaluating cell survival for various dose-rates of 0.186-60.0 Gy/h considering experimental-based DNA content and SLDR, it is suggested that the change of S phase fraction during irradiation modulates the dose-response curve and is possibly responsible for some inverse DREs.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Graduate School of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Stephen J McMahon
- Centre for Cancer Research & Cell Biology, Queen's University Belfast, Belfast, BT9 7AE, UK
| | - Kaori Tsutsumi
- Faculty of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Kohei Sasaki
- Faculty of Health Sciences, Hokkaido University of Science, Sapporo, 006-8585, Japan
| | - Go Okuyama
- Faculty of Health Sciences, Hokkaido University of Science, Sapporo, 006-8585, Japan
| | - Yuji Yoshii
- Biological Research, Education and Instrumentation Center, Sapporo Medical University, Sapporo, 060-8556, Japan
| | - Ryosuke Mori
- Graduate School of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Joma Oikawa
- Graduate School of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Kevin M Prise
- Centre for Cancer Research & Cell Biology, Queen's University Belfast, Belfast, BT9 7AE, UK
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan.
| |
Collapse
|
16
|
Matsuya Y, McMahon SJ, Tsutsumi K, Sasaki K, Okuyama G, Yoshii Y, Mori R, Oikawa J, Prise KM, Date H. Investigation of dose-rate effects and cell-cycle distribution under protracted exposure to ionizing radiation for various dose-rates. Sci Rep 2018. [PMID: 29844494 DOI: 10.1038/s41598a018-26556a5] [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: 05/06/2023] Open
Abstract
During exposure to ionizing radiation, sub-lethal damage repair (SLDR) competes with DNA damage induction in cultured cells. By virtue of SLDR, cell survival increases with decrease of dose-rate, so-called dose-rate effects (DREs). Here, we focused on a wide dose-rate range and investigated the change of cell-cycle distribution during X-ray protracted exposure and dose-response curves via hybrid analysis with a combination of in vitro experiments and mathematical modelling. In the course of flow-cytometric cell-cycle analysis and clonogenic assays, we found the following responses in CHO-K1 cells: (1) The fraction of cells in S phase gradually increases during 6 h exposure at 3.0 Gy/h, which leads to radio-resistance. (2) Slight cell accumulation in S and G2/M phases is observed after exposure at 6.0 Gy/h for more than 10 hours. This suggests that an increase of SLDR rate for cells in S phase during irradiation may be a reproducible factor to describe changes in the dose-response curve at dose-rates of 3.0 and 6.0 Gy/h. By re-evaluating cell survival for various dose-rates of 0.186-60.0 Gy/h considering experimental-based DNA content and SLDR, it is suggested that the change of S phase fraction during irradiation modulates the dose-response curve and is possibly responsible for some inverse DREs.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Graduate School of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Stephen J McMahon
- Centre for Cancer Research & Cell Biology, Queen's University Belfast, Belfast, BT9 7AE, UK
| | - Kaori Tsutsumi
- Faculty of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Kohei Sasaki
- Faculty of Health Sciences, Hokkaido University of Science, Sapporo, 006-8585, Japan
| | - Go Okuyama
- Faculty of Health Sciences, Hokkaido University of Science, Sapporo, 006-8585, Japan
| | - Yuji Yoshii
- Biological Research, Education and Instrumentation Center, Sapporo Medical University, Sapporo, 060-8556, Japan
| | - Ryosuke Mori
- Graduate School of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Joma Oikawa
- Graduate School of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan
| | - Kevin M Prise
- Centre for Cancer Research & Cell Biology, Queen's University Belfast, Belfast, BT9 7AE, UK
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Sapporo, 060-0812, Japan.
| |
Collapse
|
17
|
Mori R, Matsuya Y, Yoshii Y, Date H. Estimation of the radiation-induced DNA double-strand breaks number by considering cell cycle and absorbed dose per cell nucleus. J Radiat Res 2018; 59:253-260. [PMID: 29800455 PMCID: PMC5967466 DOI: 10.1093/jrr/rrx097] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 08/21/2017] [Indexed: 05/06/2023]
Abstract
DNA double-strand breaks (DSBs) are thought to be the main cause of cell death after irradiation. In this study, we estimated the probability distribution of the number of DSBs per cell nucleus by considering the DNA amount in a cell nucleus (which depends on the cell cycle) and the statistical variation in the energy imparted to the cell nucleus by X-ray irradiation. The probability estimation of DSB induction was made following these procedures: (i) making use of the Chinese Hamster Ovary (CHO)-K1 cell line as the target example, the amounts of DNA per nucleus in the logarithmic and the plateau phases of the growth curve were measured by flow cytometry with propidium iodide (PI) dyeing; (ii) the probability distribution of the DSB number per cell nucleus for each phase after irradiation with 1.0 Gy of 200 kVp X-rays was measured by means of γ-H2AX immunofluorescent staining; (iii) the distribution of the cell-specific energy deposition via secondary electrons produced by the incident X-rays was calculated by WLTrack (in-house Monte Carlo code); (iv) according to a mathematical model for estimating the DSB number per nucleus, we deduced the induction probability density of DSBs based on the measured DNA amount (depending on the cell cycle) and the calculated dose per nucleus. The model exhibited DSB induction probabilities in good agreement with the experimental results for the two phases, suggesting that the DNA amount (depending on the cell cycle) and the statistical variation in the local energy deposition are essential for estimating the DSB induction probability after X-ray exposure.
Collapse
Affiliation(s)
- Ryosuke Mori
- Graduate School of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Yusuke Matsuya
- Graduate School of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Yuji Yoshii
- Biological Research, Education and Instrumentation Center, Sapporo Medical University, Minami-1, Nichi-17, Chuo-ku, Sapporo 060-8556, Japan
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-812, Japan
- Corresponding author. Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-812, Japan. Tel: +81-11-706-3423; Fax: +81-11-706-4916;
| |
Collapse
|
18
|
Matsuya Y, Sasaki K, Yoshii Y, Okuyama G, Date H. Integrated Modelling of Cell Responses after Irradiation for DNA-Targeted Effects and Non-Targeted Effects. Sci Rep 2018; 8:4849. [PMID: 29555939 PMCID: PMC5859303 DOI: 10.1038/s41598-018-23202-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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: 11/02/2017] [Accepted: 03/07/2018] [Indexed: 01/10/2023] Open
Abstract
Intercellular communication after ionizing radiation exposure, so-called non-targeted effects (NTEs), reduces cell survival. Here we describe an integrated cell-killing model considering NTEs and DNA damage along radiation particle tracks, known as DNA-targeted effects (TEs) based on repair kinetics of DNA damage. The proposed model was applied to a series of experimental data, i.e., signal concentration, DNA damage kinetics, cell survival curve and medium transfer bystander effects (MTBEs). To reproduce the experimental data, the model considers the following assumptions: (i) the linear-quadratic (LQ) function as absorbed dose to express the hit probability to emit cell-killing signals, (ii) the potentially repair of DNA lesions induced by NTEs, and (iii) lower efficiency of repair for the damage in NTEs than that in TEs. By comparing the model results with experimental data, we found that signal-induced DNA damage and lower repair efficiency in non-hit cells are responsible for NTE-related repair kinetics of DNA damage, cell survival curve with low-dose hyper-radiosensitivity (HRS) and MTBEs. From the standpoint of modelling, the integrated cell-killing model with the LQ relation and a different repair function for NTEs provide a reasonable signal-emission probability and a new estimation of low-dose HRS linked to DNA repair efficiency.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Graduate School of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo, 060-0812, Japan
| | - Kohei Sasaki
- Faculty of Health Sciences, Hokkaido University of Science, Maeda 7-15, Teine-ku, Sapporo, 006-8585, Japan
| | - Yuji Yoshii
- Biological Research, Education and Instrumentation Center, Sapporo Medical University, Minami-1, Nichi-17, Chuo-ku, Sapporo, 060-8556, Japan
| | - Go Okuyama
- Faculty of Health Sciences, Hokkaido University of Science, Maeda 7-15, Teine-ku, Sapporo, 006-8585, Japan
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo, 060-0812, Japan.
| |
Collapse
|
19
|
Yoshii Y, Yatomi T. Denosumab given for 1 year was associated with an increase BMD of the lumber spine but not femoral neck in patients with dementia and osteoporosis. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2913] [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]
|
20
|
Matsuya Y, Tsutsumi K, Sasaki K, Yoshii Y, Kimura T, Date H. Modeling cell survival and change in amount of DNA during protracted irradiation. J Radiat Res 2017; 58:302-312. [PMID: 27974510 PMCID: PMC5465389 DOI: 10.1093/jrr/rrw110] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 06/20/2016] [Revised: 08/30/2016] [Indexed: 05/21/2023]
Abstract
Hyper-radiosensitivity (HRS) is a well-known bioresponse under low-dose or low-dose-rate exposures. Although disorder of the DNA repair function, non-targeted effects and accumulation of cells in G2 have been experimentally observed, the mechanism for inducing HRS by long-term irradiation is still unclear. On the basis of biological experiments and a theoretical study, we have shown that change in the amount of DNA associated with accumulation of cells in G2 enhances radiosensitivity. To demonstrate continuous irradiation with 250 kVp X-rays, we adopted a fractionated regimen of 0.186 or 1.00 Gy per fraction at intervals of 1 h (i.e. 0.186 Gy/h, 1.00 Gy/h on average) to Chinese Hamster Ovary (CHO)-K1 cells. The change in the amount of DNA during irradiation was quantified by flow cytometric analysis with propidium iodide (PI). Concurrently, we attempted a theoretical evaluation of the DNA damage by using a microdosimetric-kinetic (MK) model that was modified to incorporate the change in the amount of DNA. Our experimental results showed that the fraction of the cells in G2/M phase increased by 6.7% with 0.186 Gy/h and by 22.1% with 1.00 Gy/h after the 12th irradiation. The MK model considering the change in amount of DNA during the irradiation exhibited a higher radiosensitivity at a high dose range, which could account for the experimental clonogenic survival. The theoretical results suggest that HRS in the high dose range is associated with an increase in the total amount of DNA during irradiation.
Collapse
Affiliation(s)
- Yusuke Matsuya
- Graduate School of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Kaori Tsutsumi
- Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Kohei Sasaki
- Faculty of Health Sciences, Hokkaido University of Science, Maeda 7-15, Teine-ku, Sapporo 006-8585, Japan
| | - Yuji Yoshii
- Biological Research, Education and Instrumentation Center, Sapporo Medical University, Minami-1, Nichi-17, Chuo-ku, Sapporo 060-8556, Japan
| | - Takaaki Kimura
- Graduate School of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan
| | - Hiroyuki Date
- Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan
- Corresponding author. Faculty of Health Sciences, Hokkaido University, Kita-12, Nishi-5, Kita-ku, Sapporo 060-0812, Japan. Tel: +81-11-706-3423; Fax: +81-11-706-4916;
| |
Collapse
|
21
|
Akaishi H, Takeda H, Kanazawa Y, Yoshii Y, Asanuma O. [Development of a Lead-covered Case for a Wireless X-ray Output Analyzer to Perform CT Half-value Layer Measurements]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2016; 72:244-50. [PMID: 27000673 DOI: 10.6009/jjrt.2016_jsrt_72.3.244] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Measurement of the half-value layer (HVL) is a difficult task in computed tomography (CT) , because a nonrotating X-ray tube must be used. The purpose of this study is to develop a lead-covered case, which enables HVL measurements with a rotating CT X-ray tube. The lead-covered case was manufactured from acrylic and lead plates, which are 3 mm thick and have a slit. The slit-detector distance can be selected between 14 mm and 122 mm. HVL measurements were performed using a wireless X-ray output analyzer "Piranha." We used the following exposure conditions: tube voltages of 80, 100, and 120 kV; a tube current of 550 mA; and an exposure time of 1.0 s. The HVLs were measured by using the following two methods: (a) Nonrotating method-a conventional method that uses the nonrotating exposure mode. (b) Rotating method-a new method that uses the lead-covered case and the rotating exposure mode. As a result, when the slit-detector distance was 58 mm, the HVL values obtained by the nonrotating and rotating methods were 4.38 and 4.24 mmAl at 80 kV, 5.51 and 5.37 mmAl at 100 kV, 6.61 and 6.48 mmAl at 120 kV, respectively. A lead-covered case, which enables the measurement of the HVL in a rotating X-ray tube, was developed. The case is useful in measuring the HVLs at facilities that cannot fix the X-ray tube.
Collapse
Affiliation(s)
- Hirokazu Akaishi
- Biomedical Research, Education and Instrumentation Center, Sapporo Medical University
| | | | | | | | | |
Collapse
|
22
|
Yoshii Y, Kato T, Ono K, Takahashi E, Fujimoto N, Kobayashi S, Kimura F, Nonoyama S, Satoh T. Primary cutaneous follicle center lymphoma in a patient with WHIM syndrome. J Eur Acad Dermatol Venereol 2015; 30:529-30. [DOI: 10.1111/jdv.12927] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Y. Yoshii
- Department of Dermatology; National Defense Medical College; Tokorozawa Japan
| | - T. Kato
- Department of Pediatrics; National Defense Medical College; Tokorozawa Japan
| | - K. Ono
- Department of Dermatology; National Defense Medical College; Tokorozawa Japan
| | - E. Takahashi
- Department of Dermatology; National Defense Medical College; Tokorozawa Japan
| | - N. Fujimoto
- Department of Dermatology; National Defense Medical College; Tokorozawa Japan
| | - S. Kobayashi
- Division of Haematology; Department of Internal Medicine; National Defense Medical College; Tokorozawa Japan
| | - F. Kimura
- Division of Haematology; Department of Internal Medicine; National Defense Medical College; Tokorozawa Japan
| | - S. Nonoyama
- Department of Pediatrics; National Defense Medical College; Tokorozawa Japan
| | - T. Satoh
- Department of Dermatology; National Defense Medical College; Tokorozawa Japan
| |
Collapse
|
23
|
Yoshii Y, Sakai K, Hoshino N, Takeda T, Noro S, Nakamura T, Akutagawa T. Crystal-to-crystal structural transformation of hydrogen-bonding molecular crystals of (imidazolium)(3-hydroxy-2-quinoxalinecarboxylate) through H2O adsorption–desorption. CrystEngComm 2015. [DOI: 10.1039/c4ce02519a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crystal-to-crystal structural transformation was observed following H2O adsorption–desorption of hydrogen-bonding molecular crystals.
Collapse
Affiliation(s)
- Y. Yoshii
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
| | - K. Sakai
- Department of Bio- & Material Photonics
- Chitose Institute of Science and Technology (CIST)
- Chitose 066-8655, Japan
| | - N. Hoshino
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
| | - T. Takeda
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
| | - S. Noro
- Research Institute for Electronic Science
- Hokkaido University
- Sapporo 001-0020, Japan
| | - T. Nakamura
- Research Institute for Electronic Science
- Hokkaido University
- Sapporo 001-0020, Japan
| | - T. Akutagawa
- Graduate School of Engineering
- Tohoku University
- Sendai 980-8579, Japan
- Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
- Tohoku University
| |
Collapse
|
24
|
Peterson BM, Grier CJ, Horne K, Pogge RW, Bentz MC, De Rosa G, Denney KD, Martini P, Sergeev SG, Kaspi S, Minezaki T, Zu Y, Kochanek CS, Siverd RJ, Shappee B, Araya Salvo C, Beatty TG, Bird JC, Bord DJ, Borman GA, Che X, Chen CT, Cohen SA, Dietrich M, Doroshenko VT, Drake T, Efimov YS, Free N, Ginsburg I, Henderson CB, King AL, Koshida S, Mogren K, Molina M, Mosquera AM, Motohara K, Nazarov SV, Okhmat DN, Pejcha O, Rafter S, Shields JC, Skowron DM, Skowron J, Valluri M, van Saders JL, Yoshii Y. REVERBERATION MAPPING OF THE SEYFERT 1 GALAXY NGC 7469. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/0004-637x/795/2/149] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
|
25
|
Kawabe K, Yoshii Y, Kano O, Ikeda K, Iwasaki Y. Stress Induced-Salivary alpha-Amylase Secretion Decreases in Patients with Parkinson's Disease (P06.055). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p06.055] [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: 11/15/2022] Open
|
26
|
Yoneda M, Ikawa M, Yoshii Y, Nakamoto Y, Fujibayashi Y, Okazawa H. In Vitro and In Vivo Imaging of Over-Reduction States (Oxidative Stress) in MELAS Using PET Radiopharmaceutical Cu-ATSM (IN7-2.005). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.in7-2.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
27
|
Ikeda K, Murata K, Yoshii Y, Kawabe K, Takazawa T, Miura K, Kano O, Iwasaki Y. Relationship between Follow-Up Cervical Cord 1H-Magnetic Resonance Spectroscopy and Clinicoelectrophysiological Changes in Amyotrophic Lateral Sclerosis (P03.167). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
28
|
Yoneda M, Ikawa M, Yoshii Y, Nakamoto Y, Fujibayashi Y, Okazawa H. In Vitro and In Vivo Imaging of Over-Reduction States (Oxidative Stress) in MELAS Using PET Radiopharmaceutical Cu-ATSM (P03.147). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
29
|
Kawabe K, Yoshii Y, Kano O, Ikeda K, Iwasaki Y. Ibudilast Inhibit Th17 Differentiation (P01.028). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p01.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
30
|
Saito A, Nakazato Y, Yoshii Y, Hyodo A, Harakuni T, Toita T, Ogawa K, Horikawa K, Terada Y, Kinjo S, Minei S. Anaplastic meningioma with papillary, rhabdoid, and epithelial features: a case report. Brain Tumor Pathol 2012; 18:155-9. [PMID: 11908873 DOI: 10.1007/bf02479430] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [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: 10/24/2022]
Abstract
A 74-year-old man manifested disturbed consciousness and right hemiparesis. Computed tomography revealed a left frontal parasagittal meningeal tumor with extensive peritumoral brain edema and skull invasion. Subtotal removal was performed. Five years later, he underwent two more operations of massive recurrences. Pathological studies revealed anaplastic meningioma with two different histological areas. One was an epithelial and meningothelial area, and the other was a papillary and rhabdoid area. In the papillary and rhabdoid area, small tumor cells with a high nucleus/cytoplasm ratio proliferated densely around the dilated central capillaries with a pseudopapillary pattern. Many rhabdoid cells (vimentin ++, cytokeratin AE1/AE3 +, epithelial membrane antigen [EMA] + +) tended to be distributed far from the central capillaries. There were many mitotic figures near the central vessels. Dense MIB1-positive nuclei were also observed near the central vessels. The trabecular pattern of the tumor cells in the epithelial area was quite different from the histological features of chordoid meningioma.
Collapse
Affiliation(s)
- A Saito
- Department of Neurosurgery, Faculty of Medicine, University of the Ryukyus, Nishihara, Okinawa, Japan
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
|
32
|
Kawabe K, Yoshii Y, Ikeda K, Iwasaki Y. Progesterone levels in amyotrophic lateral sclerosis. Acta Neurol Scand 2011; 124:359; author reply 360. [PMID: 21973278 DOI: 10.1111/j.1600-0404.2011.01531.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
33
|
|
34
|
Yoshii Y, Hadano S, Otomo A, Kawabe K, Ikeda K, Iwasaki Y. Lower serum lipid levels are related to respiratory impairment in patients with ALS. Neurology 2010; 74:2027; author reply 2027-8. [PMID: 20548050 DOI: 10.1212/wnl.0b013e3181e03bbe] [Citation(s) in RCA: 5] [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: 11/15/2022] Open
|
35
|
Yoshii Y, Nishiura Y, Terui N, Hara Y, Saijilafu, Ochiai N. The effects of repetitive compression on nerve conduction and blood flow in the rabbit sciatic nerve. J Hand Surg Eur Vol 2010; 35:269-78. [PMID: 20444785 DOI: 10.1177/1753193408090107] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The objective of this study was to clarify the effect of repetitive compression on nerve physiology in an experimental rabbit model. We defined 80 mmHg as a compression force which caused temporary disturbance of nerve conduction and blood flow with a brief compression. The following compressions were applied for 30 minutes to rabbit sciatic nerves: continuous compression, low frequency release compression (1 second of release time every 30 seconds) and high frequency release compression (1 second of release time every 10 seconds). Compound nerve action potentials and nerve blood flow were evaluated from the start of compression until 30 minutes after release. Endoneurial microvascular permeability was evaluated with Evans Blue albumin. The repetitive compression groups showed delay in recovery of compound nerve action potentials and blood flow after release, with endoneurial oedema. These findings suggest that repetitive compression may increase the risk of breakdown of the blood nerve barrier.
Collapse
Affiliation(s)
- Y Yoshii
- Department of Orthopaedic Surgery, Graduate School of Comprehensive Human Sciences, University of Tsukuba, Ibaraki 305-8575, Japan.
| | | | | | | | | | | |
Collapse
|
36
|
Ikeda K, Kawabe K, Kano O, Yoshii Y, Iwasaki Y. Serum sRAGE levels in amyotrophic lateral sclerosis. Acta Neurol Scand 2010; 121:139. [PMID: 19930208 DOI: 10.1111/j.1600-0404.2009.01300.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
37
|
Yoshii Y, Hadano S, Otomo A, Suzuki K, Ikeda K, Ikeda JE, Iwasaki Y, de Carvalho M, Sabatelli M, Luigetti M, Conte A, Zollino M. NATURAL HISTORY OF YOUNG-ADULT AMYOTROPHIC LATERAL SCLEROSIS. Neurology 2009; 73:648-9; author reply 649-50. [DOI: 10.1212/wnl.0b013e3181b28674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
38
|
Yoshii Y, Ikeda K, Iwamoto K, Kawase Y, Iwasaki Y. Re: Dyslipidemia is a protective factor in amyotrophic lateral sclerosis. Neurology 2009; 72:944; author reply 944-5. [PMID: 19273834 DOI: 10.1212/01.wnl.0000339397.79460.d5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
|
39
|
Harakuni T, Hyodo A, Shingaki T, Kugai M, Kinjyo T, Kinjyo T, Tsuchida H, Sugimoto K, Yoshii Y, Matsumaru Y. Stenting for atherosclerotic stenosis of the intracranial or skull base cerebral arteries. Effectiveness and problems. Interv Neuroradiol 2008; 10 Suppl 1:97-100. [PMID: 20587281 DOI: 10.1177/15910199040100s115] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2004] [Accepted: 01/20/2004] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Since May 1992, we have performed percutaneous transluminal angioplasty (PTA) or stenting 70 times for 65 lesions in 62 patients with atherosclerotic stenosis of the intracranial or skull base cerebral arteries. Stenting was carried out nine times for nine lesions in nine cases. Stenting was performed on patients with an average age of 62. The patients were eight men and one woman. The stenotic lesions involved the internal carotid artery (petrous portion) in four cases, the internal carotid artery (cavernous portion) in two cases, the internal carotid artery (supraclinoid portion) in one case, the middle cerebral artery (M1) in one case, and the vertebral artery (V4) in one case. The degree of stenosis ranged from 70% to 99%, with a mean of 80%. A stent for coronary arteries was used in all cases. After PTA was carried out in four cases, their initial extension was inadequate, and dissection was performed in five cases after PTA. As for the results of the treatment, subarachnoid haemorrhage occurred in one case due to perforation by the guidewire, and a major deficit was accepted. During the operation, asymptomatic cerebral infarction by distal embolism occurred in one case. Although obstruction of the lesion occurred three months after treatment in one case, symptoms did not appear. Stents used for atherosclerotic stenosis of the intracranial or skull base cerebral arteries still do not have sufficient performance. Although the stenting had problems, such as a prolonged patent, in the present condition, it was effective in terms of recovery from complications due to PTA.
Collapse
Affiliation(s)
- T Harakuni
- Department of Neurosurgery, University of the Ryukyus, Okinawa; Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Ogawa K, Yoshii Y, Shikama N, Nakamura K, Uno T, Onishi H, Itami J, Shioyama Y, Ito H, Murayama S. Risk factors and treatment outcomes of spinal recurrence from intracranial germinoma. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.2086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
41
|
Ogawa K, Yoshii Y, Inoue O, Toita T, Saito A, Kakinohana Y, Adachi G, Iraha S, Tamaki W, Sugimoto K, Hyodo A, Murayama S. Phase II trial of radiotherapy after hyperbaric oxygenation with chemotherapy for high-grade gliomas. Br J Cancer 2006; 95:862-8. [PMID: 16953239 PMCID: PMC2360529 DOI: 10.1038/sj.bjc.6603342] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
We conducted a phase II trial to evaluate the efficacy and toxicity of radiotherapy immediately after hyperbaric oxygenation (HBO) with chemotherapy in adults with high-grade gliomas. Patients with histologically confirmed high-grade gliomas were administered radiotherapy in daily 2 Gy fractions for 5 consecutive days per week up to a total dose of 60 Gy. Each fraction was administered immediately after HBO with the period of time from completion of decompression to irradiation being less than 15 min. Chemotherapy consisted of procarbazine, nimustine (ACNU) and vincristine and was administered during and after radiotherapy. A total of 41 patients (31 patients with glioblastoma and 10 patients with grade 3 gliomas) were enrolled. All 41 patients were able to complete a total radiotherapy dose of 60 Gy immediately after HBO with one course of concurrent chemotherapy. Of 30 assessable patients, 17 (57%) had an objective response including four CR and 13 PR. The median time to progression and the median survival time in glioblastoma patients were 12.3 months and 17.3 months, respectively. On univariate analysis, histologic grade (P=0.0001) and Karnofsky performance status (P=0.036) had a significant impact on survival, and on multivariate analysis, histologic grade alone was a significant prognostic factor for survival (P=0.001). Although grade 4 leukopenia and grade 4 thrombocytopenia occurred in 10 and 7% of all patients, respectively, these were transient with no patients developing neutropenic fever or intracranial haemorrhage. No serious nonhaematological or late toxicities were seen. These results indicated that radiotherapy delivered immediately after HBO with chemotherapy was safe with virtually no late toxicity in patients with high-grade gliomas. Further studies are required to strictly evaluate the effectiveness of radiotherapy after HBO for these tumours.
Collapse
Affiliation(s)
- K Ogawa
- Department of Radiology, University of the Ryukyus School of Medicine, 207 Uehara, Nishihara-cho, and Department of Radiology, Naha City Hospital, Okinawa 903-0215, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Yonaha H, Hyodo A, Inaji T, Ito K, Kushi S, Tsuchida K, Saito A, Sugimoto K, Yoshii Y. Thromboembolic Events Associated with Coil Protrusion into Parent Arteries after GDC Treatment. Interv Neuroradiol 2006; 12:105-11. [PMID: 20569612 DOI: 10.1177/15910199060120s116] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2005] [Accepted: 12/15/2005] [Indexed: 11/16/2022] Open
Abstract
SUMMARY Aneurysm embolization using Guglielmi detachable coils(GDC) is gaining acceptance as a viable alternative to surgery in the treatment of cerebral aneurysms. During GDC treatment of cerebral aneurysms, thromboembolic events are the most frequent complications. As risk factors of thromboembolic events, large aneurysms, wide-necked aneurysms, use of the balloon-assisted technique and protruding coils into the parent arteries are previously reported. From March, 1997 till August, 2004, 270 consecutive patients were treated with GDC embolization at our institute. Fourteen (5.2%) patients with 14 aneurysms of these 270 patients presented with protruding coils into the parent vessels. Twelve aneurysms of these 14 aneurysms were small (diameter < 10 mm), and two were large (diameter 15 mm). Nine aneurysms had small necks (neck diameter < 4 mm), and five had wide necks(neck diameter > 4 mm). The fundus-toneck ratio ranged from 1.04 to 2.78, with an average of 1.53. In this series, ten patients (71%) were treated with balloon-remodelling technique because every patient had either a wide-necked aneurysm or complicated morphologic factors. These 14 aneurysms were divided into two groups according to the mode of coil protrusion, loop type and tail type protrusion. The first coil was protruded in five (36%) cases of 14 patients, four of these five cases presented with the loop type protrusion. The last coil was protruded in seven cases (50%), Five of these seven cases presented with the tail type protrusion. Diffusion-weighted imaging abnormalities were found for seven (50%) of 14 patients within 24 hours of the coiling procedures. Three (21%) of 14 patients showed small lesions (< 5 mm) in the subcortical white matter at the border zone or perforating regions. In four (29%) patients, large territorial infarctions (> 5 mm) were detected. Symptomatic complications occurred in four (29%) patients, and all of these four patients presented the loop type protrusion. One patient who had small infarctions experienced minimal deficits (slight motor weakness, quadrantic hemianopsia) after six days postprocedure and fully recovered by discharge after stronger systemic heparinization (24000U, for three days), aspirin (100 mg/day) and Ticlopidine (100 mg/day). Three patients who had large territorial infarctions experienced moderate deficits. Two patients were treated with stronger systemic heparinization and one with Argatroban (60 mg/day, for two days), and following aspirin (100 mg/day) and Ticlopidine (100 mg/day). Finally, two patiens were discharged with permanent minimal deficits (hypoesthesia only) and one with moderate hemiparesis. The infarctions related to the GDC procedures were more common sequelae in wide-necked aneurysms and coil protrusions, especially loop type protrusion. Although permanent neurological deficits were rare, the high rate of thromboembolic events associated with coil protrusion suggest that more aggressive medical treatment should be considered.
Collapse
Affiliation(s)
- H Yonaha
- Department of Neurosurgery, University of the Ryukyus, Okinawa; Japan -
| | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Harakuni T, Hyodo A, Shingaki T, Kugai M, Kinjyo T, Kinjyo T, Tsuchida H, Sugimoto K, Yoshii Y. Education and propagation of intravascular surgery in okinawa. Interv Neuroradiol 2004; 10 Suppl 1:113-6. [PMID: 20587285 DOI: 10.1177/15910199040100s119] [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] [Received: 01/10/2004] [Accepted: 01/20/2004] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Okinawa is an island located on the southwest edge of the Japanese Islands in which about 1,300,000 people live, and is an area where selfconclusion type medical treatment is desired. In this area, intravascular surgery was only performed for several cases per year until 1998. From May 1999, intravascular surgery started being performed in earnest, and 140 or more cases of intravascular surgery per year were performed in 2002. In the meantime, various measures for the propagation and development of intravascular surgery that we undertook led to the increase in the number of cases. As a result, the choice of medical treatment has increased by propagating these medical treatments, and it seems that this has contributed to the welfare of the people of Okinawa.
Collapse
Affiliation(s)
- T Harakuni
- Department of Neurosurgery, University of the Ryukyus, Okinawa; Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Kimura K, Tsukahara K, Usui T, Okuda J, Kitamura Y, Kosuge M, Sano T, Tohyama S, Yamanaka O, Yoshii Y, Umemura S. Low-dose tissue plasminogen activator followed by planned rescue angioplasty reduces time to reperfusion for acute myocardial infarction treated at community hospitals. Jpn Circ J 2001; 65:901-6. [PMID: 11665796 DOI: 10.1253/jcj.65.901] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The time from admission to reperfusion in patients with acute myocardial infarction (AMI) was compared according to the type of hospital and treatment strategy. A total of 164 patients with a first AMI within 12h of onset were enrolled at one tertiary emergency center (TEC) and 6 community hospitals (CHs). The subjects were randomly assigned to receive either primary percutaneous transluminal coronary angioplasty (PTCA) (TEC-primary PTCA and CHs-primary PTCA groups) or 800,000 units of intravenous monteplase, half the standard dose of a mutant tissue plasminogen activator (t-PA), followed by rescue PTCA if the Thrombolysis in Myocardial Infarction (TIMI) flow grade was 2 or less (TEC-monteplase and CHs-monteplase groups) on the first coronary angiogram. Sixty minutes after admission, TIMI flow grade 3 rates of the study groups were as follows, in descending order: TEC-monteplase group, CHs-monteplase group, TEC-primary PTCA group, and CHs-primary PTCA group (56%, 41%, 36%, and 8%, respectively; p<0.01). However, there was no significant difference in the final TIMI flow grade 3 rate among the 4 groups. In the CHs, the peak creatine kinase tended to be lower in the monteplase group than in the primary PTCA group. The results suggest that low-dose monteplase followed by rescue PTCA is an effective strategy for promoting early reperfusion in patients with AMI, especially those who are treated at CHs.
Collapse
Affiliation(s)
- K Kimura
- Division of Cardiology, Yokohama City University Medical Center, Japan.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Harakuni T, Yoshii Y, Kinjyo T, Kushi S, Shingaki T, Yonaha H, Turushima H, Saito A, Hyodo A. [Schwannoma of the cervical spinal cord with cervical angina: a case report]. No Shinkei Geka 2001; 29:641-5. [PMID: 11517505] [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: 02/21/2023]
Abstract
A case of schwannoma of the cervical spinal cord presenting with cervical angina is reported. A 49-year-old man was admitted to our hospital with severe chest pain, cold sweats, and unconsciousness. Extensive cardiac examination showed no abnormal findings. Neurological deficits were muscular weakness and atrophy of the left arm, bilateral hypersthesia of the arms, and hyporeflexia of the left biceps. MRI revealed a tumor in the left side of the spinal canal between C4 and C5. The diagnosis was neurinoma of the left nerve root in C5. The tumor was completely removed surgically by laminectomy. Surgery confirmed that the tumor had originated from the left posterior root of C5 and that, histologically, it was schwannoma. The severe chest pain immediately disappeared after removal of the tumor with only dull post-operative chest pain remaining. We hypothesized that the severe chest pain was protopathic pain caused by compression of the anterior C5 root by the tumor and/or disturbance of the inhibitory pain mechanisms of the sympathetic nerve located in the posterior horn of the spinal cord. It must be kept in mind that cervical angina caused by spinal schwannoma is one of the differential diagnoses of chest pain.
Collapse
Affiliation(s)
- T Harakuni
- Department of Neurosurgery, Faculty of Medicine, University of the Ryukyus, 207 Uehara, Nishihara-machi, Okinawa 903-0125, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
46
|
Hyodo A, Matsumaru Y, Anno I, Sato H, Kato N, Hashimoto T, Yoshii Y, Nose T, Kamezaki T, Okazaki M. Intravascular neurosurgery for cerebral aneurysm using interlocking detachable coils. Interv Neuroradiol 2001; 3 Suppl 2:149-53. [PMID: 20678407 DOI: 10.1177/15910199970030s231] [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] [Received: 09/15/1997] [Accepted: 09/18/1997] [Indexed: 11/15/2022] Open
Abstract
SUMMARY Instead of the Guglielmi detachable coil (GDC; Target Therapeutics, Fremont, California), the interlocking detachable coil (IDC; Target Therapeutics, Fremont, California) was the only available detachable and retractable coil in Japan until February 1997. From October 1993 to February 1997, endovascular treatment with IDCs were attempted for 25 cases of cerebral aneurysm. Within 25 trials, 15 cases were treated by intraaneurysmal coil embolization, 9 cases by parent artery or proximal occlusion using IDCs and one case could not be treated due to anatomical problems of the aneurysm. As for 15 cases of intraaneurysmal coil packing, complete occlusion was performed in 9 cases, subtotal occlusion in 4 cases and partial occlusion in 2 cases. In one of the partial occluded cases, a coil compaction occurred 6 months after embolization. Distal emboli were recognized on CT after embolization in 3 cases, however, only one case was symptomatic. Intraoperative bleeding occurred in one case, but no obvious hemorrhage after coil embolization in any case. From our experiences, treatment for poor-grade ruptured aneurysm is still difficult, but intravascular surgery for cerebral aneurysms using IDC is possible and a useful alternative, especially for surgically difficult aneurysm.
Collapse
Affiliation(s)
- A Hyodo
- Department of Neurosurgery, University of Tsukuba; Tsukuba, Ibakary, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Tsukahara K, Kimura K, Usui T, Okuda J, Kitamura Y, Kosuge M, Sano T, Tohyama S, Nemoto T, Yamanaka O, Yoshii Y, Tochikubo O, Umemura S. [Efficacy of low-dose mutant tissue-type plasminogen activator followed by planned rescue percutaneous transluminal coronary angioplasty as reperfusion therapy for acute myocardial infarction]. J Cardiol 2001; 37:143-50. [PMID: 11281054] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
OBJECTIVES The efficacy of injection of a low-dose mutant tissue-type plasminogen activator (mt-PA), monteplase, followed by planned rescue percutaneous transluminal coronary angioplasty (PTCA) was compared with that of primary PTCA. METHODS A total of 164 patients with acute myocardial infarction within 12 hr from onset were randomly assigned to a treatment with 80 x 10(4) U bolus of monteplase (Group M) or no administration (Group P) by the envelope method, followed by immediate angiography with angioplasty in patients with Thombolysis in Myocardial Infarction (TIMI) flow grade 0, 1 or 2. RESULTS There were no differences in baseline characteristics between the two groups. Initial angiography showed a higher reperfusion rate (TIMI 2 + 3: 21% + 38% vs 13% + 9%, p < 0.001) and the median time to TIMI 3 was shorter (63 vs 78 min, p < 0.005) in Group M than in Group P, but the final TIMI 3 rate was similar (93% vs 96%). Peak creatine kinase was lower, and predischarge left ventricular ejection fraction measured in 70% of all patients was higher (59 +/- 9% vs 54 +/- 14%, p = 0.02) in Group M than in Group P. Recurrent ischemia with ST elevation occurred in three patients in Group M, but death, re-acute myocardial infarction or stroke did not occur in either group and the rate of bleeding complication was similar (4.9% vs 3.7%). PTCA was performed less frequently in Group M, but medical expenses were comparable in both groups. CONCLUSIONS Low-dose mt-PA followed by rescue PTCA is effective for early recanalization and preservation of left ventricular function without increases in bleeding complications or medical expenses. These results suggest that low-dose mt-PA should be given to all patients with acute myocardial infarction who are scheduled to undergo primary PTCA.
Collapse
Affiliation(s)
- K Tsukahara
- Second Department of Internal Medicine, Yokohama City University Medical School, Yokohama
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
48
|
Yoshii Y, Saito A, Hyodo A, Tsurushima H, Sun L. Expression of enzymes and oncogene induced after radiotherapy and/or chemotherapy in patients with brain tumors. Hum Cell 2001; 14:95-103. [PMID: 11436358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
The relationship between the degree of the expression of Cu/Zn SOD, GST-pi and bcl-2 in the initial and recurrent tumor tissue after radiotherapy and/or chemotherapy and the cellular heterogeneity obtained from DNA content by image cytometry was investigated. Subjects were 7 patients who had glial tumors which were surgically removed at onset and removed a second time at recurrence. Radiotherapy and chemotherapy were also administered after initial resection. Immunoreactivity for copper/zinc super oxide dismutase (Cu/Zn SOD), GST (glutathione-S-transferase)-pi, and bcl-2 were evaluated from routinely prepared tissue blocks. Tumors were classified into two groups by cytometric analysis of DNA ploidy in the G2M cell cycle phase. One tumor group consisted of single clonal cells in both the initial and recurrent tumors and the other group consisted of tumors with polyclonal cells in the initial and recurrent tumor. In this study, one patient (case 3) with single clonal cell glioblastoma at recurrence did not show high Cu/Zn SOD activity after radiotherapy and chemotherapy but showed a short survival time after recurrence. In three patients (cases 1, 2, 3) with single clonal-cell glioblastoma, the recurrent tumor cells showed high GST-pi immunoreactivity and survival time was short after recurrence. Tumor cells in two patients (cases 5, 7) with single clonal cell anaplastic glioma at recurrence, showed high GST-pi immunoreactivity and had a short survival time after recurrence. In three single clonal glioblastomas (cases 1, 2, 3), the recurrent tumor showed the increased bcl-2 immunoreactivity and showed a short survival time after recurrence. In two patients (case 5, 7) with single clonal cell anaplastic glioma at recurrence, tumor cells showed a high bcl-2 immunoreactivity and these patients showed a short survival time after recurrence. Although the number of subjects is very small, our study shows that the immunoreactivity of bcl-2 and GST-pi in malignant gliomas may be very important factors in radio- and chemosensitivity, and shows that GST-pi is induced by radiation and anti-cancer drugs.
Collapse
Affiliation(s)
- Y Yoshii
- Department of Neurosurgery, Faculty of Medicine, University of the Ryukyus.
| | | | | | | | | |
Collapse
|
49
|
Hyodo A, Harakuni T, Shingaki T, Tsurushima H, Saito A, Yoshii Y. [Recent progress in intravascular neurosurgery for the treatment of cerebrovascular disease]. Rinsho Shinkeigaku 2000; 40:1241-3. [PMID: 11464467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
With the recent advances in the devices and techniques in intravascular neurosurgery such as microcatheters or a digital subtraction angiography, intravascular neurosurgery plays an important role for the treatment of cerebrovascular disease. We describe here, a recent progress in intravascular neurosurgery for the treatment of cerebrovascular disease. As a treatment of cerebrovascular disease, we discuss the treatment of cerebral aneurysm using Guglielmi detachable coils (GDC), and the treatment of ischemic cerebrovascular disease such as the thrombolytic therapy for the acute embolic occlusion of the cerebral artery, and a percutaneous transluminal angioplasty (PTA) or a stenting for the stenotic lesion of the cerebral arteries. Embolization of the cerebral aneurysm using GDC is less invasive method compare to the standard neurosurgical clipping of aneurysm. So, recently it becomes one of standard methods of the treatment of cerebral aneurysm. Thrombolytic therapy, PTA and stenting also become an important treatment for the ischemic cerebrovascular disease.
Collapse
Affiliation(s)
- A Hyodo
- Department of Neurosurgery, University of the Ryukyus
| | | | | | | | | | | |
Collapse
|
50
|
Tsurushima H, Yonaha H, Tamura T, Kinjo T, Saito A, Harakuni T, Miyagi K, Hyodo A, Yoshii Y. Brain metastasis of epithelioid sarcoma--case report. Neurol Med Chir (Tokyo) 2000; 40:585-8. [PMID: 11109797 DOI: 10.2176/nmc.40.585] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
A 20-year-old-female first presented with an epithelioid sarcoma of the right thumb, and the right thumb was amputated. Five years later, a metastasis was found in the right lower lung and a partial lobectomy was performed. Three years later, computed tomography showed a metastatic brain tumor in the left frontal lobe, which was removed surgically. Adjuvant radiotherapy and chemotherapy were given after all operations. Histological examination showed all resected tumors were epithelioid sarcoma. She has maintained a good activity of daily living level as an outpatient for 2 years, although subcutaneous metastases and bronchial lymph node metastases have been observed. Such intensive treatment of slowly growing tumors often prolongs survival time, even in patients with multiple metastases.
Collapse
Affiliation(s)
- H Tsurushima
- Department of Neurosurgery, School of Medicine, University of the Ryukyus, Okinawa
| | | | | | | | | | | | | | | | | |
Collapse
|