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Grinderslev JB, Häussermann U, Jensen TR, Faraone A, Nagao M, Karlsson M, Udovic TJ, Andersson MS. Reorientational Dynamics in Y(BH 4) 3· xNH 3 ( x = 0, 3, and 7): The Impact of NH 3 on BH 4- Dynamics. J Phys Chem C Nanomater Interfaces 2024; 128:4431-4439. [PMID: 38533240 PMCID: PMC10961835 DOI: 10.1021/acs.jpcc.4c00265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 02/23/2024] [Accepted: 03/01/2024] [Indexed: 03/28/2024]
Abstract
The reorientational dynamics of Y(BH4)3·xNH3 (x = 0, 3, and 7) was studied using quasielastic neutron scattering (QENS) and neutron spin echo (NSE). The results showed that changing the number of NH3 ligands drastically alters the reorientational mobility of the BH4- anion. From the QENS experiments, it was determined that the BH4- anion performs 2-fold reorientations around the C2 axis in Y(BH4)3, 3-fold reorientations around the C3 axis in Y(BH4)3·3NH3, and either 2-fold reorientations around the C2 axis or 3-fold reorientations around the C3 axis in Y(BH4)3·7NH3. The relaxation time of the BH4- anion at 300 K decreases from 2 × 10-7 s for x = 0 to 1 × 10-12 s for x = 3 and to 7 × 10-13 s for x = 7. In addition to the reorientational dynamics of the BH4- anion, it was shown that the NH3 ligands exhibit 3-fold reorientations around the C3 axis in Y(BH4)3·3NH3 and Y(BH4)3·7NH3 as well as 3-fold quantum mechanical rotational tunneling around the same axis at 5 K. The new insights constitute a significant step toward understanding the relationship between the addition of ligands and the enhanced ionic conductivity observed in systems such as LiBH4·xNH3 and Mg(BH4)2·xCH3NH2.
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Affiliation(s)
- J. B. Grinderslev
- Interdisciplinary
Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Aarhus DK-8000, Denmark
| | - U. Häussermann
- Department
of Materials and Environmental Chemistry, Stockholm University, SE-10691 Stockholm, Sweden
| | - T. R. Jensen
- Interdisciplinary
Nanoscience Center (iNANO) and Department of Chemistry, Aarhus University, Aarhus DK-8000, Denmark
| | - A. Faraone
- NIST Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United
States
| | - M. Nagao
- NIST Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United
States
- Department
of Materials Science and Engineering, University
of Maryland, College Park, Maryland 20742-2115, United States
- Department
of Physics and Astronomy, University of
Delaware, Newark, Delaware 19716, United States
| | - M. Karlsson
- Department
of Chemistry and Chemical Engineering, Chalmers
University of Technology, Göteborg SE-412 96, Sweden
| | - T. J. Udovic
- NIST Center
for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, United
States
- Department
of Materials Science and Engineering, University
of Maryland, College Park, Maryland 20742-2115, United States
| | - M. S. Andersson
- Ångström
Laboratory, Department of Chemistry, Uppsala
University, Box 538, SE-751 21 Uppsala, Sweden
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Okumura Y, Inomata T, Fujimoto K, Fujio K, Zhu J, Yanagawa A, Shokirova H, Saita Y, Kobayashi Y, Nagao M, Nishio H, Sung J, Midorikawa-Inomata A, Eguchi A, Nagino K, Akasaki Y, Hirosawa K, Huang T, Kuwahara M, Murakami A. Biological effects of stored platelet-rich plasma eye-drops in corneal wound healing. Br J Ophthalmol 2023; 108:37-44. [PMID: 36162968 DOI: 10.1136/bjo-2022-322068] [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: 06/22/2022] [Accepted: 09/08/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND/AIMS This study aimed to assess the efficacy and sterility of stored platelet-rich plasma (PRP) eye-drops for corneal epithelial wound healing compared with those of autologous serum (AS) eye-drops. METHODS At our single institution, PRP and AS eye-drops were prepared using peripheral blood obtained from six healthy volunteers and stored at 4°C. Platelet and leucocyte counts and transforming growth factor (TGF)-β1, epidermal growth factor (EGF), and fibronectin levels were assessed during storage for up to 4 weeks. Sterility was assessed by culturing 4-week poststorage samples. PRP, AS, and phosphate-buffered saline (PBS) eye-drop efficacies were compared using corneal epithelial wound healing assays in vitro and in vivo and monitoring wound areas under a microscope every 3 hours. RESULTS Higher platelet and lower leucocyte counts were seen in PRP than in whole blood on the day of preparation. After storage, TGF-β1, EGF, and fibronectin levels were significantly higher in PRP than in AS eye-drops. In vitro and in vivo, PRP eye-drops used on the day of preparation significantly promoted corneal epithelial wound healing compared with PBS. Moreover, PRP eye-drops stored for 4 weeks significantly promoted corneal wound healing compared with PBS and AS eye-drops. CONCLUSION PRP eye-drops stored at 4°C for 4 weeks promoted corneal epithelial wound healing with higher levels of growth factors than those observed in AS eye-drops, while maintaining sterility, suggesting that this preparation satisfies the unmet medical needs in the treatment of refractory keratoconjunctival epithelial disorders.
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Affiliation(s)
- Yuichi Okumura
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Takenori Inomata
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Hospital Administration, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- AI Incubation Farm, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Keiichi Fujimoto
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Kenta Fujio
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Jun Zhu
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Ai Yanagawa
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Hurramhon Shokirova
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Yoshitomo Saita
- Department of Sports and Regenerative Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Orthopedics, Juntendo University Faculty of Medicine, Bunkyo-ku, Japan
| | - Yohei Kobayashi
- Department of Sports and Regenerative Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Orthopedics, Juntendo University Faculty of Medicine, Bunkyo-ku, Japan
| | - Masahi Nagao
- Department of Sports and Regenerative Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Orthopedics, Juntendo University Faculty of Medicine, Bunkyo-ku, Japan
- Department of Medical Technology Innovation Center, Juntendo University, Bunkyo-ku, Japan
| | - Hirofumi Nishio
- Department of Sports and Regenerative Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Orthopedics, Juntendo University Faculty of Medicine, Bunkyo-ku, Japan
| | - Jaemyoung Sung
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- University of South Florida College of Medicine, Tampa, Florida, USA
| | - Akie Midorikawa-Inomata
- Department of Hospital Administration, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Atsuko Eguchi
- Department of Hospital Administration, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Ken Nagino
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Hospital Administration, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Yasutsugu Akasaki
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Kunihiko Hirosawa
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Tianxiang Huang
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Mizu Kuwahara
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Akira Murakami
- Department of Ophthalmology, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
- Department of Digital Medicine, Juntendo University Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
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3
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Shiina Y, Inai K, Sakai R, Tokushige K, Nagao M. Hepatocellular carcinoma and focal nodular hyperplasia in patients with Fontan-associated liver disease: characterisation using dynamic gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid-enhanced MRI. Clin Radiol 2023; 78:e197-e203. [PMID: 36481111 DOI: 10.1016/j.crad.2022.10.012] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 08/24/2022] [Accepted: 10/31/2022] [Indexed: 12/12/2022]
Abstract
AIM To identify the characteristic diagnostic features of hepatocellular carcinoma (HCC) and focal nodular hyperplasia (FNH) in Fontan-associated liver disease (FALD) patients using dynamic gadolinium ethoxybenzyl diethylenetriamine pentaacetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (MRI). MATERIALS AND METHODS Thirty-one FALD patients (mean age, 28.3 ± 7.2 years) with liver nodules who underwent dynamic Gd-EOB-DTPA-enhanced MRI were enrolled prospectively. Twenty-five patients (mean age, 72.8 ± 11.4 years) with hepatitis C virus (HCV)-related HCC constituted the control group. The tumour-to-liver signal intensity (SI) ratio was measured at 30, 60, 100, 180 seconds and 15 minutes, and the SI ratio was compared among FALD-HCC, FALD-FNH, and HCV-HCC. RESULTS FALD-HCC exhibited weak early enhancement with mild washout in late phases. FALD-FNH exhibited marked early enhancement that continued until the late phases. The SI ratio was significantly lower for FALD-HCC than for FALD-FNH in all phases. The SI ratio was significantly lower for FALD-HCC than for HCV-HCC only at 30 seconds (p<0.05), whereas poorer washout was seen in FALD-HCC than HCV-HCC in other phases. In 15 minutes, FALD-HCC had a significantly lower SI ratio compared to FALD-FNH (p<0.001). CONCLUSIONS The time course of Gd-EOB-DTPA-enhanced MRI signal intensity in FALD-HCC was different from that in FALD-FNH or HCV-HCC. This imaging finding may be useful adjunctive information to distinguish FALD-HCC from FALD-FNH.
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Affiliation(s)
- Y Shiina
- Department of Pediatric Cardiology and Adult Congenital Cardiology, Tokyo Women's Medical University, Tokyo, Japan; Cardiovascular Center, St Luke's International Hospital, Tokyo, Japan
| | - K Inai
- Department of Pediatric Cardiology and Adult Congenital Cardiology, Tokyo Women's Medical University, Tokyo, Japan
| | - R Sakai
- Department of Diagnostic Imaging & Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan
| | - K Tokushige
- Department of Gastroenterology, Tokyo Women's Medical University, Tokyo, Japan
| | - M Nagao
- Department of Diagnostic Imaging & Nuclear Medicine, Tokyo Women's Medical University, Tokyo, Japan.
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4
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Kayawake H, Tanaka S, Yamada Y, Yutaka Y, Ohsumi A, Nakajima D, Hamaji M, Nagao M, Date H. Cytomegalovirus Infection After Lung Transplantation. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1553] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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5
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Ohsumi A, Nagao M, Kayawake H, Tanaka S, Yamada Y, Yutaka Y, Nakajima D, Date H. Strategy for Pre- and Post-Transplant Management of Pulmonary Nontuberculous Mycobacterial Infection. J Heart Lung Transplant 2022. [DOI: 10.1016/j.healun.2022.01.1228] [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] Open
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6
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Ootake T, Ishii T, Sueishi K, Watanabe A, Ishizuka Y, Amano K, Nagao M, Nishimura K, Nishii Y. Effects of mechanical stress and deficiency of dihydrotestosterone or 17β-estradiol on Temporomandibular Joint Osteoarthritis in mice. Osteoarthritis Cartilage 2021; 29:1575-1589. [PMID: 34500105 DOI: 10.1016/j.joca.2021.08.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 10/09/2020] [Revised: 08/18/2021] [Accepted: 08/20/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To observe and analyze the interaction between excessive mechanical stress (MS) and decreased sex hormones on Temporomandibular Joint Osteoarthritis (TMJ-OA), and to discover TMJ-OA disease susceptibility genes by molecular biological analysis to elucidate part of the mechanism of TMJ-OA onset. DESIGN For experimental groups, orchiectomy (ORX) or ovariectomy (OVX) was performed on sexually mature 8-week-old mice. A metal plate was attached to the posterior surface of the maxillary incisors to apply excessive MS on mandibular condyles. Male mice were divided into control, ORX, MS, and ORX + MS groups, while female mice were divided into control, OVX, MS, and OVX + MS groups. Mandibular condyles were evaluated by histology and molecular biology. RESULTS Histomorphometric analysis of the TMJ in ORX + MS and OVX + MS groups revealed the thinnest chondrocyte layers, highest modified Mankin scores, and significant increases in the number of osteoclasts. Gene expression analysis indicated upregulation of Angptl7 and Car1 genes in the mandibular condyles of mice subjected to the combined effects of excessive MS and reduced sex hormones. In vitro analysis suggested that cartilage-like cells overexpressing Angptl7 enhanced calcification, and osteoblast-like cells overexpression Car1 suppressed cell proliferation and calcification. CONCLUSIONS A severe TMJ-OA mouse model was successfully developed by applying excessive MS on the mandibular condyle of male and female mice with reduced sex hormones. Disease-susceptibility genes Angptl7 and Car1 were newly discovered in the experimental groups, suggesting their involvement in the onset mechanism of TMJ-OA.
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Affiliation(s)
- T Ootake
- Department of Orthodontics (Suidobashi Hospital), Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo 101-0061, Japan
| | - T Ishii
- Department of Orthodontics (Suidobashi Hospital), Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo 101-0061, Japan.
| | - K Sueishi
- Department of Orthodontics (Suidobashi Hospital), Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo 101-0061, Japan
| | - A Watanabe
- Department of Oral and Maxillofacial Surgery, Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo 101-0061, Japan
| | - Y Ishizuka
- Department of Epidemiology and Public Health, Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo 101-0061, Japan
| | - K Amano
- The First Department of Oral and Maxillofacial Surgery, Osaka University Graduate School of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - M Nagao
- Department of Orthopaedic Surgery, Juntendo University School of Medicine, 2-1-1 Hongo Bunkyo-ku, Tokyo, 113-8421 Japan
| | - K Nishimura
- Clinics for Maxillo-Oral Disorders, Dental Center, Tohoku University Hospital, 1-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8574, Japan
| | - Y Nishii
- Department of Orthodontics (Suidobashi Hospital), Tokyo Dental College, 2-9-18 Kanda-Misakicho, Chiyoda-ku, Tokyo 101-0061, Japan
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7
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Vásquez FA, Rosero-Navarro NC, Miura A, Jalem R, Goto Y, Nagao M, Tateyama Y, Tadanaga K, Calderón JA. Kinetic Control of the Li 0.9Mn 1.6Ni 0.4O 4 Spinel Structure with Enhanced Electrochemical Performance. ACS Appl Mater Interfaces 2021; 13:14056-14067. [PMID: 33723987 DOI: 10.1021/acsami.0c17886] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The development of more sustainable societies has become an urgent goal worldwide. Electrical batteries are currently seen as one of the most important energy storage technologies for the development of decarbonized societies. However, many lithium-ion battery manufacturers currently utilize cobalt, a toxic and hazardous mineral, in their batteries. Lithium-deficient manganese nickel oxide spinels are considered promising candidates owing to their high potential and environmental friendliness. Their electrochemical performance highly depends on their average and local structures, such as phase purities, lattice parameters, and cation sites. Thus, a synthesis protocol should be designed to control these structural parameters to improve their electrochemical performance. In this study, we controlled the average and local structures of Li0.9Mn1.6Ni0.4O4 spinels obtained by co-precipitation by optimizing their cooling rates. High-resolution techniques, including transmission electron microscopy, synchrotron X-ray diffraction, and Auger-composition analysis combined with density functional theory calculations, X-ray absorption spectroscopy, and electrochemical analysis, were used to understand the average and local structural variations and their effects on the electrochemical properties. As a result, the control of oxygen diffusion at different cooling rates can promote the rearrangement of the structure, resulting in a cation-disordered spinel with minimal variations in lattice parameters and composition. Excellent electrochemical properties were noted in the cation-disordered spinel with high crystallinity and a slightly oxygen-rich surface produced via optimized cooling rates.
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Affiliation(s)
- F A Vásquez
- CIDEMAT, Universidad de Antioquia, Street 70# 52-21, Medellín 050010, Colombia
| | - N C Rosero-Navarro
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - A Miura
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - R Jalem
- Center for Green Research on Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Center for Materials Research By Information Integration (CMÎ2), Research and Services Division of Materials Data and Integrated System (MaDIS), NIMS, Tsukuba, Ibaraki 305-0044, Japan
- PRESTO, Japan Science and Technology Agency (JST), Saitama 333-0012, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Kyoto, Kyoto 615-8g245, Japan
| | - Y Goto
- Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan
| | - M Nagao
- Center for Crystal Science and Technology, University of Yamanashi, Kofu 400-0021, Japan
| | - Y Tateyama
- Center for Green Research on Energy and Environmental Materials (GREEN), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki 305-0044, Japan
- Center for Materials Research By Information Integration (CMÎ2), Research and Services Division of Materials Data and Integrated System (MaDIS), NIMS, Tsukuba, Ibaraki 305-0044, Japan
- Elements Strategy Initiative for Catalysts & Batteries, Kyoto University, Kyoto, Kyoto 615-8g245, Japan
| | - K Tadanaga
- Division of Applied Chemistry, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan
| | - J A Calderón
- CIDEMAT, Universidad de Antioquia, Street 70# 52-21, Medellín 050010, Colombia
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Yamamoto A, Nagao M, Ando K, Nakao R, Sakai A, Watanabe E, Momose M, Sato K, Sakai S, Hagiwara N. High-risk plaque burdens myocardial flow reserve in intermediate coronary artery disease: hybrid analysis of 13N-ammonia PET and coronary CT angiography. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0288] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
13N-ammonia PET (NH3-PET) can detect myocardial perfusion abnormalities in patients with coronary artery disease (CAD) and also obtain diagnostic quantitative values of absolute myocardial blood flow and myocardial flow reserve (MFR). Low MFR (MFR<2.0) is an independent prognostic factor for major adverse cardiac event in patients with ischemic and non-ischemic heart disease. A feature of low attenuation plaque (LAP) on coronary CT angiography (CCTA) has been known as high-risk plaque (HRP) for acute coronary syndrome even if there is no significant coronary stenosis. The presence of HRP potentially adversely affects MFR, but the hypothesis has not been elucidated.
Purpose
We aimed to investigate the affect of LAP to MFR in intermediate CAD.
Methods
One hundred five patients (age 67±9 years, 65% male) with CAD underwent NH3-PET and CCTA within 6 months between April 2015 and March 2019 were enrolled. Based on the results of CCTA, mild and moderate stenosis were defined as 1% to 49% and 50% to 69% stenosis. Ischemic territories for major three vessels were identified by stress/rest NH3-PET images. Finally, 194 coronary arteries with mild to moderate stenosis corresponding to non-ischemic territory were analyzed in this study. LAP was defined as plaques containing CT value less than 90HU. Partially calcified plaques were included in LAP. Entirely calcification plaque without LAP was defined as calcified plaque. MFR for major three vessels were calculated from dynamic scan at stress/rest NH3-PET.
Results
CCTA showed 80 coronary arteries with LAP (41%), 104 coronary arteries with calcified plaque (54%), 102 vessels with mild stenosis (53%), and 92 vessels with moderate stenosis (47%). MFRs for coronary arteries with LAP were significantly lower than those without LAP (2.1±0.6 vs 2.5±0.6, p<0.0001). The significant difference in MFR between with and without LAP was observed in both mild and moderate stenosis (mild: 2.0±0.6 vs 2.5±0.6, p=0.0015, moderate: 2.1±0.6 vs 2.5±0.6, p<0.0001). In contrast, coronary arteries with calcified plaque had significantly higher MFR than those without (2.5±0.6 vs 2.1±0.6, p<0.0001).
In 58 coronary arteries with MFR<2.0, 71% (41/58) had LAP and 24% (14/58) had calcified plaque. In 136 coronary arteries with MFR≥2.0, 29% (39/136) had LAP and 66% (90/136) had calcified plaque. LAP was significantly more frequent in the former and calcified plaque was significantly more frequent in the latter.
Conclusion
The presence of LAP burdens MFR in mild to moderate CAD. On the other hand, calcified plaque alone had no adverse effect on MFR. LAP is an important sign in CAD risk assessment even without significant coronary stenosis.
MFR and stress MPI
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- A Yamamoto
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - M Nagao
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - K Ando
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - R Nakao
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - A Sakai
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - E Watanabe
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - M Momose
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - K Sato
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - S Sakai
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
| | - N Hagiwara
- Tokyo Women's Medical University Hospital, Shinjyuku, Japan
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9
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Fujimoto D, Otake H, Kawamori H, Toba T, Nagao M, Sugizaki Y, Nagasawa A, Takeshige R, Harada A, Murakami K, Iino T, Irino Y, Toh R, Hirata K. Cholesterol uptake capacity: a new measure of HDL functionality as a predictor of subsequent revascularization in patients undergoing percutaneous coronary intervention. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1497] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Recent studies have demonstrated the importance of high-density lipoprotein (HDL) functionality in the development of de novo coronary artery disease by using the cholesterol-efflux capacity, a measure of the ability of HDL to promote cholesterol removal from lipid-laden macrophages. Recently, we developed a rapid cell-free assay system to directly evaluate the capacity of HDL to accept additional cholesterol; the measurement of the cholesterol-uptake capacity (CUC) enables HDL functionality to be readily evaluated in our daily practice. However, prognostic implication of CUC measurement at the timing of percutaneous coronary intervention (PCI) remains unclear.
Purpose
We aimed to evaluate the association between baseline CUC and revascularization during follow-up in the patients who underwent PCI.
Methods
We retrospectively reviewed the patients who underwent PCI with follow-up coronary angiography (CAG) or ischemic-driven revascularization. The patients who had the frozen blood samples of which CUC were measurable at the index PCI and follow-up CAG or revascularization were enrolled. We excluded the patients under hemodialysis.
Results
Among a total of 703 consecutive patients who underwent PCI between Dec 2014 and Mar 2019, we finally enrolled 74 patients who underwent ischemic-driven revascularization (revascularization group) and 183 patients who underwent follow-up CAG without revascularization (non-revascularization group).There were no significant difference in baseline traditional cardiovascular risk factors between the groups. However, the presence of diabetes was significantly more frequent in the revascularization group (63.5% vs 41.0%; P=0.001) than in the non-revascularization group. CUC at the index PCI was significantly lower in the revascularization group than in the non-revascularization group (87.0±19.5 vs 93.9±19.2; P=0.004). Multivariate logistic regression analysis revealed that impaired HDL functionality assessed by decreased CUC level at the index PCI (odds ratio; 0.984, 95% confidence interval; 0.969–1.000) was independently associated with subsequent revascularization after PCI. Indeed, there was a graded inverse association between increasing tertiles of CUC levels and the incidence of revascularization during a median follow-up of 881 days (Figure). Especially in the subgroup analysis of non-diabetic patients, decreased CUC level at the index PCI was independently associated with subsequent revascularization (odds ratio; 0.947, 95% confidence interval; 0.915–0.981), while not in diabetic population.
Conclusion
Serum CUC level at the index procedure was associated with subsequent revascularization especially in non-diabetic patients who underwent PCI.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- D Fujimoto
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - H Otake
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - H Kawamori
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - T Toba
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - M Nagao
- Kobe University Graduate School of Medicine, Division of Evidence-based Laboratory Medicine, Kobe, Japan
| | - Y Sugizaki
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - A Nagasawa
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - R Takeshige
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
| | - A Harada
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - K Murakami
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - T Iino
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - Y Irino
- Central Research Laboratories, Sysmex Corporation, Kobe, Japan
| | - R Toh
- Kobe University Graduate School of Medicine, Division of Evidence-based Laboratory Medicine, Kobe, Japan
| | - K Hirata
- Kobe University Graduate School of Medicine, Division of Cardiovascular Medicine, Department of Internal Medicine, Kobe, Japan
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10
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Kikuchi N, Yamamoto E, Nagao M, Momose M, Hattori H, Suzuki A, Shiga T, Niinami H, Hagiwara N, Nunoda S. P3359Myocardial flow reserve using 13N ammonia PET for detection of cardiac allograft vasculopathy in heart transplant patients. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0235] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Purpose
Risk stratification and early detection of cardiac allograft vasculopathy (CAV) are essential in heart transplantation patients. CAV is associated with poor outcome in the chronic phase after heart transplantation. CAV presents a diffuse vascular involvement and has been difficult to noninvasively diagnose by the lack of a sensitive method to detect developing vascular pathology in the allograft. The present study investigates the ability of 13N-ammonia PET for detection of CAV in heart transplant patients.
Methods
Data of adenosine-stress 13N-ammonia PET imaging for thirty-one patients (mean age, 39 years-old) after 11 + 7 years from transplant was analyzed. Five patients had undergone percutaneous coronary intervention (PCI), and the remaining 26 patients had no history of definite myocardial ischemia. Myocardial flow was generated from the time activity curve of left ventricle input and myocardial uptake using 3-compartment model and the first 2 minutes' dataset of list-mode acquisition. Global - myocardial flow reserve (MFR) was calculated by stress to rest flow ratio. Patient with global-MFR <2.0 was defined as significant decrease. Summed difference score (SDS) was used as an estimate for the extent of ischemia, and the patient showing SDS >2 was identified as those having significant ischemia.
Results
The mean Global-MFR of our subjects were 2.3 (1.2 to 3.9). MFR using 13N-ammonia PET significantly decreases in one third of heart transplant patients in chronic stage. Eleven patients with Global-MFR <2.0 (35%) were observed, and eight of them had no history of clinical myocardial ischemia. The proportion of patients with a history of PCI is 18% in patients with Global-MFR <2.0 (vs 5%, p=0.210). Moreover, there were eight patients with SDS >2 (26%) including three patients having a history of PCI. The proportion of patients with a history of PCI tends to be high with SDS >2 (38% vs 9%, p=0.056).
Conclusion
This modality using 13N ammonia PET is useful for easily detection of CAV before manifestation of symptomatic myocardial ischemia in heart transplant patients.
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Affiliation(s)
- N Kikuchi
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - E Yamamoto
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - M Nagao
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - M Momose
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - H Hattori
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - A Suzuki
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - T Shiga
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - H Niinami
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - N Hagiwara
- Tokyo Women's Medical University, Shinjuku-ku, Japan
| | - S Nunoda
- Tokyo Women's Medical University, Shinjuku-ku, Japan
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11
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Nakao R, Nagao M, Momose M, Kasuga N, Matsuo Y, Fukushima K, Watanabe E, Sakai A, Hagiwara N. P3354Papillary muscle ischemia and global myocardial flow reserve: assessment by high-resolution cine imaging of 13N ammonia PET. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0230] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Purpose
Papillary muscle ischemia (PMI) is caused by micro-vessels' occlusion in the broad endocardium because papillary muscle perfusion is supply from micro-vessels of peripheral coronary arteries and is easy to fail by the increase in peripheral vascular resistance. However, the clinical significant is not understood because PMI could not be detected by existing perfusion imaging such as SPECT and MRI. We propose the detection method of PMI using 13N-ammonia PET (NH3-PET), and investigate the association with the global myocardial flow reserve (Global-MFR) reflecting coronary microvascular dysfunction.
Methods
Data of adenosine-stress NH3-PET for consecutive 260 patients with coronary artery disease (CAD) or suspected CAD was retrospectively analyzed. Using high-resolution cine imaging derived from NH3-PET, PMI was defined as the absence of the PM accumulation at stress conditions. Myocardial flow was generated from the time activity curve of left ventricle input and myocardial uptake using 3-compartment model and the first 2 minutes' dataset of list mode images. Global-MFR was calculated by stress to rest flow ratio. Summed stress score (SSS) was used as an estimate of the extent of myocardial ischemia. 150 out of 260 patients (58%) with SSS ≥4 or with the past history of coronary artery diseases were classified as ischemic group, and 110 patients (42%) with SSS<4 were classified as non-ischemic group.
Results
PMI was seen in 68 of 260 patients (26.6%). The frequency of PMI was higher in the ischemic group than the non-ischemic group (37.8% vs. 10.1%, p<0.0001). Global-MFR was significantly lower in patients with PMI than those without (1.87±0.55 vs. 2.39±0.80, p<0.0001). In both ischemic and non-ischemic group, global-MFR was significantly reduced in patients with PMI. (Ischemic group: 1.83±0.56 vs. 2.12±0.52, p=0.0043, Non-ischemic group: 2.06±0.45 vs. 2.63±0.91, p=0.040).
Typical case of PMI
Conclusion
High-resolution cine imaging derived from NH3-PET makes it possible to detect PMI in about a quarter of patients with CAD or suspected CAD. PMI associates with reduced Global-MFR regardless of the presence of myocardial ischemia, suggesting that PMI is an important sign of early ischemia confined to the papillary muscle or the broad microvascular injury.
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Affiliation(s)
- R Nakao
- Tokyo Womens Medical University, Department of Cardiology, Tokyo, Japan
| | - M Nagao
- Tokyo Womens Medical University, Department of Diagnostic Imaging and Nuclear Medicine, Tokyo, Japan
| | - M Momose
- Tokyo Womens Medical University, Department of Diagnostic Imaging and Nuclear Medicine, Tokyo, Japan
| | - N Kasuga
- Tokyo Womens Medical University, Department of Diagnostic Imaging and Nuclear Medicine, Tokyo, Japan
| | - Y Matsuo
- Tokyo Womens Medical University, Department of Diagnostic Imaging and Nuclear Medicine, Tokyo, Japan
| | - K Fukushima
- Saitama International Medical Center, Department of Nuclear Medicine, Cardiology, Hidaka, Japan
| | - E Watanabe
- Tokyo Womens Medical University, Department of Cardiology, Tokyo, Japan
| | - A Sakai
- Tokyo Womens Medical University, Department of Cardiology, Tokyo, Japan
| | - N Hagiwara
- Tokyo Womens Medical University, Department of Cardiology, Tokyo, Japan
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12
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Nagase T, Komatsu M, So YG, Ishida T, Yoshida H, Kawaguchi Y, Tanaka Y, Saitoh K, Ikarashi N, Kuwahara M, Nagao M. Smectic Liquid-Crystalline Structure of Skyrmions in Chiral Magnet Co_{8.5}Zn_{7.5}Mn_{4}(110) Thin Film. Phys Rev Lett 2019; 123:137203. [PMID: 31697552 DOI: 10.1103/physrevlett.123.137203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Indexed: 06/10/2023]
Abstract
The organizing of magnetic skyrmions shows several forms similar to atomic arrays of solid states. Using Lorentz transmission electron microscopy, we report the first direct observation of a stable liquid-crystalline structure of skyrmions in chiral magnet Co_{8.5}Zn_{7.5}Mn_{4}(110) thin film, caused by magnetic anisotropy and chiral surface twist. Elongated skyrmions are oriented and periodically arranged only in the ⟨110⟩ directions, whereas they exhibit short-range order along the ⟨001⟩ directions, indicating a smectic skyrmion state. In addition, skyrmions possess anisotropic interaction with an opposite sign depending on the crystal orientation, in contrast to existing isotropic interaction.
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Affiliation(s)
- T Nagase
- Department of Electrical, Electronic Engineering and Information Engineering, School of Engineering, Nagoya University, Nagoya 464-8601, Japan
| | - M Komatsu
- Department of Materials Science, Graduate School of Engineering Science, Akita University, Akita 010-8502, Japan
| | - Y G So
- Department of Materials Science, Graduate School of Engineering Science, Akita University, Akita 010-8502, Japan
| | - T Ishida
- Advanced Measurement Technology Center, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
| | - H Yoshida
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - Y Kawaguchi
- Department of Applied Physics, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
| | - Y Tanaka
- Department of Applied Physics, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
| | - K Saitoh
- Advanced Measurement Technology Center, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
| | - N Ikarashi
- Center for Integrated Research of Future Electronics, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
- Department of Electronics, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - M Kuwahara
- Advanced Measurement Technology Center, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
| | - M Nagao
- Center for Integrated Research of Future Electronics, Institute of Materials and Systems for Sustainability, Nagoya University, Nagoya 464-8601, Japan
- Department of Electronics, Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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13
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Sharma VK, Nagao M, Rai DK, Mamontov E. Membrane softening by nonsteroidal anti-inflammatory drugs investigated by neutron spin echo. Phys Chem Chem Phys 2019; 21:20211-20218. [PMID: 31486459 DOI: 10.1039/c9cp03767e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In spite of their well-known side effects, the nonsteroidal anti-inflammatory drugs (NSAIDs) are one of the most commonly prescribed medications for their antipyretic and anti-inflammatory actions. Interaction of NSAIDs with the plasma membrane plays a vital role in their therapeutic actions and defines many of their side effects. In the present study, we investigate the effects of three NSAIDs, aspirin, ibuprofen, and indomethacin, on the structure and dynamics of a model plasma membrane using a combination of small angle neutron scattering (SANS) and neutron spin echo (NSE) techniques. The SANS and NSE measurements were carried out on a 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) membrane, with and without NSAIDs, at two different temperatures, 11 °C and 37 °C, where the DMPC membrane is in the gel and fluid phase, respectively. SANS data analysis shows that incorporation of NSAIDs leads to bilayer thinning of the membrane in both the phases. The dynamic properties of the membrane are represented by the intermediate scattering functions for NSE data, which are successfully described by the Zilman and Granek model. NSE data analysis shows that in both gel and fluid phases, addition of NSAIDs results in a decrease in the bending rigidity and compressibility modulus of the membrane, which is more prominent when the membrane is in the gel phase. The magnitude of the effect of NSAIDs on the bending rigidity and compressibility modulus of the membrane in the gel phase follows an order of ibuprofen > aspirin > indomethacin, whereas in the fluid phase, it is in the order of aspirin > ibuprofen > indomethacin. We find that the interaction between NSAIDs and phospholipid membranes is strongly dependent on the chemical structure of the drugs and physical state of the membrane. Mechanical properties of the membrane can be quantified by the membrane's bending rigidity. Hence, the present study reveals that incorporation of NSAIDs modulates the mechanical properties of the membrane, which may affect several physiological processes, particularly those linked to the membrane curvature.
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Affiliation(s)
- V K Sharma
- Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
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14
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Miyazaki T, Zhao Z, Ichihara Y, Yoshino D, Imamura T, Sawada K, Hayano S, Kamioka H, Mori S, Hirata H, Araki K, Kawauchi K, Shigemoto K, Tanaka S, Bonewald LF, Honda H, Shinohara M, Nagao M, Ogata T, Harada I, Sawada Y. Mechanical regulation of bone homeostasis through p130Cas-mediated alleviation of NF-κB activity. Sci Adv 2019; 5:eaau7802. [PMID: 31579816 PMCID: PMC6760935 DOI: 10.1126/sciadv.aau7802] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 09/03/2019] [Indexed: 05/07/2023]
Abstract
Mechanical loading plays an important role in bone homeostasis. However, molecular mechanisms behind the mechanical regulation of bone homeostasis are poorly understood. We previously reported p130Cas (Cas) as a key molecule in cellular mechanosensing at focal adhesions. Here, we demonstrate that Cas is distributed in the nucleus and supports mechanical loading-mediated bone homeostasis by alleviating NF-κB activity, which would otherwise prompt inflammatory processes. Mechanical unloading modulates Cas distribution and NF-κB activity in osteocytes, the mechanosensory cells in bones. Cas deficiency in osteocytes increases osteoclastic bone resorption associated with NF-κB-mediated RANKL expression, leading to osteopenia. Upon shear stress application on cultured osteocytes, Cas translocates into the nucleus and down-regulates NF-κB activity. Collectively, fluid shear stress-dependent Cas-mediated alleviation of NF-κB activity supports bone homeostasis. Given the ubiquitous expression of Cas and NF-κB together with systemic distribution of interstitial fluid, the Cas-NF-κB interplay may also underpin regulatory mechanisms in other tissues and organs.
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Affiliation(s)
- T. Miyazaki
- Department of Geriatric Medicine, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo 173-0015, Japan
- Department of Orthopaedic Surgery, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo 173-0015, Japan
- Corresponding author. (T.M.); (Y.S.)
| | - Z. Zhao
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
- Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore
| | - Y. Ichihara
- Department of Rehabilitation for Motor Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama 359-8555, Japan
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan
| | - D. Yoshino
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
- Creative Interdisciplinary Research Division, Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - T. Imamura
- Division of Pharmacology, Faculty of Medicine, Tottori University, Yonago, Tottori 683-8503, Japan
| | - K. Sawada
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
- Laboratory for Mechanical Medicine, Nadogaya Research Institute, Nadogaya Hospital, Kashiwa, Chiba 277-0032, Japan
| | - S. Hayano
- Department of Orthodontics, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Okayama 700-8525, Japan
| | - H. Kamioka
- Department of Orthodontics, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Okayama 700-8525, Japan
| | - S. Mori
- Department of Geriatric Medicine, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo 173-0015, Japan
| | - H. Hirata
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - K. Araki
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - K. Kawauchi
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - K. Shigemoto
- Department of Geriatric Medicine, Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo 173-0015, Japan
| | - S. Tanaka
- Department of Orthopaedic Surgery, Graduate School of Medicine, The University of Tokyo, Tokyo 113-0033, Japan
| | - L. F. Bonewald
- Indiana Center for Musculoskeletal Health, School of Medicine, Indiana University, Indianapolis, IN 46202, USA
| | - H. Honda
- Field of Human Disease Models, Institute of Laboratory Animals, Tokyo Women’s Medical University, Tokyo 162-8666, Japan
| | - M. Shinohara
- Department of Rehabilitation for Motor Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama 359-8555, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - M. Nagao
- Department of Rehabilitation for Motor Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama 359-8555, Japan
| | - T. Ogata
- Department of Rehabilitation for Motor Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama 359-8555, Japan
| | - I. Harada
- Laboratory for Mechanical Medicine, Nadogaya Research Institute, Nadogaya Hospital, Kashiwa, Chiba 277-0032, Japan
| | - Y. Sawada
- Mechanobiology Institute, National University of Singapore, Level 10, T-Lab, 5A Engineering Drive 1, Singapore 117411, Singapore
- Department of Rehabilitation for Motor Functions, Research Institute, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama 359-8555, Japan
- Laboratory for Mechanical Medicine, Nadogaya Research Institute, Nadogaya Hospital, Kashiwa, Chiba 277-0032, Japan
- Department of Clinical Research, National Rehabilitation Center for Persons with Disabilities, Tokorozawa, Saitama 359-8555, Japan
- Corresponding author. (T.M.); (Y.S.)
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15
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Kikuchi N, Yamamoto E, Hattori H, Nagao M, Momose M, Shiga T, Hagiwara N, Niinami H, Nunoda S. Myocardial Flow Reserve Using 13N Ammonia PET for Detection of Cardiac Allograft Vasculopathy. J Heart Lung Transplant 2019. [DOI: 10.1016/j.healun.2019.01.704] [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: 10/27/2022] Open
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16
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Kenters N, Tartari E, Hopman J, El-Sokkary RH, Nagao M, Marimuthu K, Vos MC, Huijskens EGW, Voss A. Worldwide practices on flexible endoscope reprocessing. Antimicrob Resist Infect Control 2018; 7:153. [PMID: 30564309 PMCID: PMC6296091 DOI: 10.1186/s13756-018-0446-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [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: 06/14/2018] [Accepted: 12/04/2018] [Indexed: 12/21/2022] Open
Abstract
Background Endoscopy related infections represent an important threat for healthcare systems worldwide. Recent outbreaks of infections with multidrug resistant micro-organisms have highlighted the problems of contaminated endoscopes. Endoscopes at highest risk for contamination have intricate mechanisms, multiple internal channels and narrow lumens that are especially problematic to clean. In light of raised awareness about the necessity for meticulous reprocessing of all types of endoscopes, a call for international collaboration is needed. An overview is presented on current practices for endoscope reprocessing in facilities worldwide. Method An electronic survey was developed and disseminated by the International Society for Antimicrobials and Chemotherapy. The survey consisted of 50 questions aimed at assessing the reprocessing of flexible endoscopes internationally. It covered three core elements: stakeholder involvement, assessment of perceived risks, and reprocessing process. Results The survey received a total of 165 completed responses from 39 countries. It is evident that most facilities, 82% (n = 136), have a standard operating procedure. There is, however a lot of variation within the flexible endoscope reprocessing practices observed. The need for regular training and education of reprocessing practitioners were identified by 50% (n = 83) of the respondents as main concerns that need to be addressed in order to increase patient safety in endoscope reprocessing procedures. Conclusion This international survey on current flexible endoscope reprocessing identified a large variation for reprocessing practices among different health care facilities/countries. A standardised education and training programme with a competency assessment is essential to prevent reprocessing lapses and improve patient safety. Electronic supplementary material The online version of this article (10.1186/s13756-018-0446-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- N Kenters
- 1Department of Medical Microbiology, Radboud University Medical Centre, Radboudumc, Nijmegen, the Netherlands
| | - E Tartari
- 2Infection Control Programme & WHO collaborating Centre of Patient, Safety, Geneva University Hospitals and Faculty of Medicine, Geneva, Switzerland.,3Faculty of Health Sciences, University of Malta, Msida, Malta
| | - J Hopman
- 1Department of Medical Microbiology, Radboud University Medical Centre, Radboudumc, Nijmegen, the Netherlands
| | - Rehab H El-Sokkary
- 4Department of Medical Microbiology and Immunology, Faculty of Medicine, Zagazig University, Zagazig, Arab Republic of Egypt
| | - M Nagao
- 5Department of Infection and Prevention, Kyoto University Hospital, Kyoto, Japan
| | - K Marimuthu
- 6Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Republic of Singapore.,National Centre for Infectious Diseases, Singapore, Republic of Singapore
| | - M C Vos
- 8Department of Medical Microbiology and Infectious Diseases, Erasmus MC, Rotterdam, the Netherlands
| | | | - E G W Huijskens
- 10Department of Medical Microbiology, Albert Schweitzer hospital, Dordrecht, the Netherlands
| | - Andreas Voss
- 1Department of Medical Microbiology, Radboud University Medical Centre, Radboudumc, Nijmegen, the Netherlands.,11Department of Medical Microbiology, Canisius Wilhelmina Hospital, Nijmegen, the Netherlands
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17
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Mori Y, Okazaki F, Inuo C, Yamaguchi Y, Masuda S, Sugiura S, Fukuie T, Nagao M, Tsuge I, Yosikawa T, Yagami A, Matsunaga K, Fujisawa T, Ito K, Narita H, Kondo Y. Evaluation of serum IgE in peach-allergic patients with systemic reaction by using recombinant Pru p 7 (gibberellin-regulated protein). Allergol Immunopathol (Madr) 2018; 46:482-490. [PMID: 29786518 DOI: 10.1016/j.aller.2018.02.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 02/14/2018] [Accepted: 02/22/2018] [Indexed: 10/16/2022]
Abstract
BACKGROUND Lipid transfer protein (LTP) is a major fruit allergen. It has, however, recently been revealed that the systemic reaction in peach-allergic patients is related not only to LTP (Pru p 3) but also to gibberellin-regulated protein (Pru p 7). We investigated recombinant Pru p 7 (rPru p 7) for its potential use in worldwide standardization for the diagnosis of peach allergy. METHODS Natural Pru p 7 (nPru p 7) was purified from peach crude extract using a monoclonal antibody affinity column. Complementary DNA for Pru p 7 was cloned and expressed in Escherichia coli and Pichia pastoris. Serum immunoglobulin (Ig) E in peach-allergic patients was examined by enzyme-linked immunosorbent assay (ELISA) using nPru p 7 and rPru p 7 (E. coli product: erPru p 7 and P. pastoris product: prPru p 7). RESULTS Peach-allergic patients (n=27) were diagnosed and categorized into oral reaction (n=10) or systemic reaction (n=17). The nPru p 7 positivity based on serum IgE levels was 52% in the systemic-reaction group and 0% in the oral-reaction group (P<0.05). In the systemic-reaction group, there was no significant difference in reactivity between nPru p 7 and prPru p 7, but the reactivity of erPru p 7 was significantly lower than those of nPru p 7 and prPru p 7 (P<0.05). CONCLUSIONS We found that prPru p 7 exhibited reactivity in ELISA comparable to that of nPru p 7 for the diagnosis of peach allergy with systemic reaction.
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18
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Abe T, Sakai A, Watanabe E, Nagao M, Sakai S, Hagiwara N. P3701Analysis of myocardial fibrosis using cardiac magnetic resonance T1 imaging and late gadolinium enhancement: Association with ventricular tachycardia in hypertrophic cardiomyopathy. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3701] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- T Abe
- Tokyo Women's Medical University, cardiology, Tokyo, Japan
| | - A Sakai
- Tokyo Women's Medical University, cardiology, Tokyo, Japan
| | - E Watanabe
- Tokyo Women's Medical University, cardiology, Tokyo, Japan
| | - M Nagao
- Tokyo Women's Medical University, Department of Diagnostic Imaging & Nuclear Medicine, Tokyo, Japan
| | - S Sakai
- Tokyo Women's Medical University, Department of Diagnostic Imaging & Nuclear Medicine, Tokyo, Japan
| | - N Hagiwara
- Tokyo Women's Medical University, cardiology, Tokyo, Japan
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19
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Nagao M, Fukuda A, Seno H. Gastrointestinal: An unusual cause of thickening of the rectal wall. J Gastroenterol Hepatol 2018; 33:1307. [PMID: 29607542 DOI: 10.1111/jgh.14107] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- M Nagao
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - A Fukuda
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - H Seno
- Department of Gastroenterology and Hepatology, Graduate School of Medicine, Kyoto University, Kyoto, Japan
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20
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Morioka H, Nagao M, Yoshihara S, Ohge H, Kasahara K, Shigemoto N, Kajihara T, Mori M, Iguchi M, Tomita Y, Ichiyama S, Yagi T. The first multi-centre point-prevalence survey in four Japanese university hospitals. J Hosp Infect 2018; 99:325-331. [PMID: 29549049 DOI: 10.1016/j.jhin.2018.03.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Accepted: 03/05/2018] [Indexed: 11/18/2022]
Abstract
BACKGROUND The Japanese government adopted a national action plan on antimicrobial resistance, which aims to reduce drug-resistant pathogens and antimicrobial use. A point-prevalence survey (PPS) is a useful surveillance method to gain information about hospital epidemiology; however, no multi-centre PPS has previously been performed in Japan. AIM To investigate general information about hospital epidemiology, healthcare-associated infections (HCAIs), and antimicrobial use in multiple Japanese university hospitals. METHODS In July 2016, a multi-centre PPS was conducted using a standardized protocol at four university hospitals in Japan. FINDINGS A total of 3199 patients were included. Median age and duration of hospital stay were 64 years and 10 days, respectively. A total of 246 (7.7%; 95% confidence interval (CI): 6.8-8.7) patients had 256 active HCAIs, and 933 (29.2%; 95% CI: 27.6-30.8) patients received 1318 antimicrobials. Pneumonia and gastrointestinal system infection were the most common HCAIs (N = 42, 16.4%), and Enterobacteriaceae (N = 49, 30.8%) were the predominant causative organisms. Carbapenems (N = 52, 17.8%), anti-MRSA medications, and cephems with antipseudomonal activity were the most frequently prescribed antimicrobials for HCAIs. As surgical prophylaxis, 46 of 278 antimicrobials (16.5%) were administered orally. Proportions of HCAI and antimicrobial use in each hospital ranged from 4.8% to 9.5% and 19.3%-35.0%, respectively. CONCLUSION This multi-centre PPS recorded detailed HCAI data and distinct antimicrobial use in Japanese university hospitals. Further surveillance is necessary to reduce HCAIs and formulate feasible plans to achieve the national action plan on antimicrobial resistance.
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Affiliation(s)
- H Morioka
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - M Nagao
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
| | - S Yoshihara
- Center for Infectious Diseases, Nara Medical University, Kashihara, Nara, Japan
| | - H Ohge
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
| | - K Kasahara
- Center for Infectious Diseases, Nara Medical University, Kashihara, Nara, Japan
| | - N Shigemoto
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
| | - T Kajihara
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
| | - M Mori
- Project Research Center for Nosocomial Infectious Diseases, Hiroshima University, Hiroshima, Japan
| | - M Iguchi
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - Y Tomita
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, Japan
| | - S Ichiyama
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Kyoto, Japan
| | - T Yagi
- Department of Infectious Diseases, Nagoya University Hospital, Nagoya, Aichi, Japan.
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Jono K, Nagao M, Oh T, Sonoda S, Hoshino Y, Miura Y. Controlling the lectin recognition of glycopolymersviadistance arrangement of sugar blocks. Chem Commun (Camb) 2018; 54:82-85. [DOI: 10.1039/c7cc07107h] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Control of molecular recognitionvialiving radical polymerization.
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Affiliation(s)
- K. Jono
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - M. Nagao
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - T. Oh
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - S. Sonoda
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Y. Hoshino
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Y. Miura
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
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Nakayama Y, Shimizu T, Matsuda C, Haraguchi M, Hayashi K, Bokuta K, Nagao M, Kawata A, Isozaki E. Non-motor symptoms during disease progression in ALS patients with tracheostomy and invasive ventilation. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1600] [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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Arouca R, Silva Neto MB, Chaves CM, Nagao M, Watauchi S, Tanaka I, ElMassalami M. Manifestation of hopping conductivity and granularity within phase diagrams of LaO 1-x F x BiS 2, Sr 1-x La x FBiS 2 and related BiS 2-based compounds. J Phys Condens Matter 2017; 29:355702. [PMID: 28758640 DOI: 10.1088/1361-648x/aa7c37] [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: 06/07/2023]
Abstract
Layered BiS [Formula: see text] -based series, such as LaO [Formula: see text] F [Formula: see text] BiS [Formula: see text] and Sr [Formula: see text] La [Formula: see text] FBiS [Formula: see text] , offer ideal examples for studying normal and superconducting phase diagram of a solid solution that evolves from a nonmagnetic band-insulator parent. We constructed typical [Formula: see text] phase diagrams of these systems based on events occurring in thermal evolution of their electrical resistivity, [Formula: see text]. Overall evolution of these diagrams can be rationalized in terms of (i) Mott-Efros-Shklovskii scenario which, within the semiconducting [Formula: see text] regime ([Formula: see text] metal-insulator transition), describes the doping influence on the thermally activated hopping conductivity. (ii) A granular metal (superconductor) scenario which, within [Formula: see text], describes the evolution of normal and superconducting properties in terms of conductance g, Coulomb charging energy E c and Josephson coupling J; their joint influence is usually captured within a [Formula: see text] phase diagram. Based on analysis of the granular character of [Formula: see text], we converted the [Formula: see text] diagrams into projected g - T diagrams which, being fundamental, allow a better understanding of evolution of various granular-related properties (in particular the hallmarks of normal-state [Formula: see text] feature and superconductor-insulator transition) and how such properties are influenced by x, pressure or heat treatment.
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Affiliation(s)
- R Arouca
- Instituto de Fisica, Universidade Federal do Rio de Janeiro, Caixa Postal 68528, 21945-970 Rio de Janeiro, Brazil
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Kawabata Y, Bradbury R, Kugizaki S, Weigandt K, Melnichenko YB, Sadakane K, Yamada NL, Endo H, Nagao M, Seto H. Effect of interlamellar interactions on shear induced multilamellar vesicle formation. J Chem Phys 2017; 147:034905. [PMID: 28734290 DOI: 10.1063/1.4994563] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Shear-induced multilamellar vesicle (MLV) formation has been studied by coupling the small-angle neutron scattering (SANS) technique with neutron spin echo (NSE) spectroscopy. A 10% mass fraction of the nonionic surfactant pentaethylene glycol dodecyl ether (C12E5) in water was selected as a model system for studying weak inter-lamellar interactions. These interactions are controlled either by adding an anionic surfactant, sodium dodecyl sulfate, or an antagonistic salt, rubidium tetraphenylborate. Increasing the charge density in the bilayer induces an enhanced ordering of the lamellar structure. The charge density dependence of the membrane bending modulus was determined by NSE and showed an increasing trend with charge. This behavior is well explained by a classical theoretical model. By considering the Caillé parameters calculated from the SANS data, the layer compressibility modulus B¯ is estimated and the nature of the dominant inter-lamellar interaction is determined. Shear flow induces MLV formation around a shear rate of 10 s-1, when a small amount of charge is included in the membrane. The flow-induced layer undulations are in-phase between neighboring layers when the inter-lamellar interaction is sufficiently strong. Under these conditions, MLV formation can occur without significantly changing the inter-lamellar spacing. On the other hand, in the case of weak inter-lamellar interactions, the flow-induced undulations are not in-phase, and greater steric repulsion leads to an increase in the inter-lamellar spacing with shear rate. In this case, MLV formation occurs as the amplitude of the undulations gets larger and the steric interaction leads to in-phase undulations between neighboring membranes.
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Affiliation(s)
- Y Kawabata
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - R Bradbury
- Center for Exploration of Energy and Matter, Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
| | - S Kugizaki
- Department of Chemistry, Tokyo Metropolitan University, Hachioji, Tokyo 192-0397, Japan
| | - K Weigandt
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-6102, USA
| | - Y B Melnichenko
- Biology and Soft Matter Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6393, USA
| | - K Sadakane
- Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - N L Yamada
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| | - H Endo
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
| | - M Nagao
- Center for Exploration of Energy and Matter, Department of Physics, Indiana University, Bloomington, Indiana 47408, USA
| | - H Seto
- Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tokai 319-1106, Japan
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Furuya K, Nagao M, Sato Y, Ito S, Fujisawa T. Predictive values of egg-specific IgE by two commonly used assay systems for the diagnosis of egg allergy in young children: a prospective multicenter study. Allergy 2016; 71:1435-43. [PMID: 27061295 PMCID: PMC5129468 DOI: 10.1111/all.12912] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/06/2016] [Indexed: 11/29/2022]
Abstract
Background Specific IgE (sIgE) is often used to predict oral food challenge (OFC) outcomes in food allergy, but interpretation of the results may vary depending on the assay method employed and the patient population tested. The aim of this study was to use two commercial assay systems to determine egg‐sIgE values predictive of allergy within the most common populations treated at pediatric clinics. Methods In a multicenter prospective study, 433 children with suspected or confirmed egg allergy underwent oral challenge (OFC) using cooked egg (CE) and raw egg (RE) powders to diagnose either true allergy in 1‐year‐old (group A, n = 220) or tolerance in 2‐ to 6‐year‐old (group B, n = 213). Egg white (EW)‐ and ovomucoid (OM)‐sIgE values were measured using the ImmunoCAP®sIgE (ImmunoCAP) and the IMMULITE® 2000 3 gAllergy™ (3gAllergy) systems. Children were recruited from six primary care clinics and 18 hospitals in Japan. Results Receiver‐operating characteristic (ROC) curve analysis yielded similar areas under the curve (AUC) for the two assays (0.7–0.8). The optimal cutoff values and the probability curves (PCs) of the sIgE by the two assays to predict CE and RE OFC outcomes were determined for both groups. Values for 3gAllergy were higher than for ImmunoCAP; however, correlation of sIgE and predicted probability calculated by PCs were strong between the two methods. Conclusions Cutoff values and PCs for egg‐sIgE established using both ImmunoCAP and 3gAllergy may be useful for predicting egg allergy in early childhood patient populations.
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Affiliation(s)
- K. Furuya
- Allergy Center and Institute for Clinical Research; Mie National Hospital; Tsu Japan
| | - M. Nagao
- Allergy Center and Institute for Clinical Research; Mie National Hospital; Tsu Japan
| | - Y. Sato
- Department of Global Clinical Research; Graduate School of Medicine; Chiba University; Chiba Japan
| | - S. Ito
- Department of Food Science and Nutrition; Faculty of Human Life and Science; Doshisha Women's College of Liberal Arts; Kyoto Japan
| | - T. Fujisawa
- Allergy Center and Institute for Clinical Research; Mie National Hospital; Tsu Japan
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Asai A, Shuto Y, Nagao M, Miyazawa T, Sugihara H, Oikawa S. Antiatherogenic effect of metformin in two mouse lines with different susceptibility to glucose intolerance. Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.730] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kato K, Matsumura Y, Yamamoto M, Nagao M, Ito Y, Takakura S, Ichiyama S. Erratum to: Seasonal trend and clinical presentation of Bacillus cereus bloodstream infection: association with summer and indwelling catheter. Eur J Clin Microbiol Infect Dis 2016; 35:875-83. [PMID: 27010814 DOI: 10.1007/s10096-016-2618-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Bacillus cereus, an opportunistic pathogen, can cause fatal infection. However, B. cereus bloodstream infections (BSIs) have not been well characterised. From 2008 to 2013, B. cereus isolates from all of the specimens and patients with B. cereus BSIs were identified. Environmental samples were collected to detect B. cereus contamination. We also characterised the clinical presentation of B. cereus BSI through analyses of risk factors for BSI and mortality. A total of 143 clinical B. cereus isolates was detected. Fifty-one patients with nosocomial infections were diagnosed as B. cereus BSI, and 37 had contaminated blood cultures. The number of B. cereus isolates and BSI patients was significantly greater from June to September than from January to April (3.4 vs. 1.0 per month and 1.4 vs. 0.2, respectively). All BSIs were nosocomial and related to central or peripheral vascular catheter. Urinary catheter [odds ratio (OR) 6.93, 95 % confidence interval (CI) 2.40-20.0] was the independent risk factor associated with BSI patients when compared to patients regarded as contaminated. In-hospital mortality among BSI patients was 20 % and was associated with urinary catheter (OR 12.3, 95 % CI 0.67-225, p=0.045) and higher Charlson index (OR 1.99, 95 % CI 1.26-3.12). The number of B. cereus isolates and BSI increased during summer. Inpatients with indwelling vascular or urinary catheters should be carefully monitored for potential B. cereus BSIs.
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Affiliation(s)
- K Kato
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Y Matsumura
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan.
| | - M Yamamoto
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - M Nagao
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Y Ito
- Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - S Takakura
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - S Ichiyama
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan
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Nagao M, Kurebayashi Y, Seto H, Takahashi T, Suzuki T, Hoshino Y, Miura Y. Polyacrylamide backbones for polyvalent bioconjugates using “post-click” chemistry. Polym Chem 2016. [DOI: 10.1039/c6py00904b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This paper reports the synthesis and application of acrylamide-type neoglycoconjugates interacting with practical targets.
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Affiliation(s)
- M. Nagao
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Y. Kurebayashi
- Department of Biochemistry
- University of Shizuoka
- Shizuoka 422-8526
- Japan
| | - H. Seto
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - T. Takahashi
- Department of Biochemistry
- University of Shizuoka
- Shizuoka 422-8526
- Japan
| | - T. Suzuki
- Department of Biochemistry
- University of Shizuoka
- Shizuoka 422-8526
- Japan
| | - Y. Hoshino
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Y. Miura
- Department of Chemical Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
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Kunisawa K, Nakashima N, Nagao M, Nomura T, Kinoshita S, Hiramatsu M. Betaine prevents homocysteine-induced memory impairment via matrix metalloproteinase-9 in the frontal cortex. Behav Brain Res 2015; 292:36-43. [DOI: 10.1016/j.bbr.2015.06.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 05/29/2015] [Accepted: 06/03/2015] [Indexed: 12/01/2022]
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Yabuuchi H, Matsuo Y, Abe K, Baba S, Sunami S, Kamitani T, Yonezawa M, Yamasaki Y, Kawanami S, Nagao M, Okamoto T, Nakamura K, Yamamoto H, Sasaki M, Honda H. Anterior mediastinal solid tumours in adults: characterisation using dynamic contrast-enhanced MRI, diffusion-weighted MRI, and FDG-PET/CT. Clin Radiol 2015; 70:1289-98. [PMID: 26272529 DOI: 10.1016/j.crad.2015.07.004] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 07/08/2015] [Accepted: 07/08/2015] [Indexed: 01/12/2023]
Abstract
AIM To find significant parameters to characterise anterior mediastinal solid tumours in adults using dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI), diffusion-weighted MRI (DWI), and combined 2-[(18)F]-fluoro-2-deoxy-d-glucose positron-emission tomography/computed tomography (FDG-PET/CT). MATERIALS AND METHODS Forty-eight histologically confirmed anterior mediastinal solid tumours in 48 patients (24 men, 24 women; age range 21-83 years, mean 50.7 years) were examined. The parameters analysed were maximal diameter, presence of capsule/septa on T2-weighted images, time-signal intensity curves (TICs), apparent diffusion coefficient (ADC), and maximum standardised uptake value (SUVmax). Also examined was whether any differences between histological types could be seen in these parameters. In a validation study, 42 anterior mediastinal solid tumours in 42 patients were examined consecutively. RESULTS The washout pattern on TIC was seen only in thymic epithelial tumours (20/32). SUVmax of lymphoma (mean, 17.9), malignant germ cell tumours (14.2), and thymic carcinomas (15.6) were significantly higher than that of thymomas (6.1). The mean maximal diameter of thymic epithelial tumours was significantly smaller than that of lymphomas (p<0.01) and malignant germ cell tumours (p<0.05). The validation study also yielded high accuracy (38/42, 91%) in differentiation among the anterior mediastinal solid tumours. CONCLUSION The SUVmax, TIC pattern on DCE-MRI, and maximal diameter might be useful to differentiate anterior mediastinal solid tumours in adults.
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Affiliation(s)
- H Yabuuchi
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
| | - Y Matsuo
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - K Abe
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - S Baba
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - S Sunami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - T Kamitani
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - M Yonezawa
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - Y Yamasaki
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - S Kawanami
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - M Nagao
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - T Okamoto
- Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - K Nakamura
- Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - H Yamamoto
- Department of Anatomic Pathology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - M Sasaki
- Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
| | - H Honda
- Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan
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Sakai N, Yabuuchi H, Kondo M, Matsuo Y, Kamitani T, Nagao M, Jinnouchi M, Yonezawa M, Kojima T, Yano Y, Honda H. Low-dose CT screening using hybrid iterative reconstruction: confidence ratings of diagnoses of simulated lesions other than lung cancer. Br J Radiol 2015; 88:20150159. [PMID: 26153902 DOI: 10.1259/bjr.20150159] [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: 11/05/2022] Open
Abstract
OBJECTIVE To evaluate the confidence ratings of diagnoses of simulated lesions other than lung cancer on low-dose screening CT with hybrid iterative reconstruction (IR). METHODS Simulated lesions (emphysema, mediastinal masses and interstitial pneumonia) in a chest phantom were scanned by a 320-row area detector CT. The scans were performed by 64-row and 160-row helical scans at various dose levels and were reconstructed by filtered back projection (FBP) and IR. Emphysema, honeycombing and reticular opacity were visually scored on a four-point scale by six thoracic radiologists. The ground-glass opacity as a percentage of total lung volume (%GGO), CT value and contrast-to-noise ratio (CNR) of mediastinal masses were calculated. These scores and values were compared between FBP and IR. Wilcoxon's signed-rank test was used (p < 0.05). Interobserver agreements were evaluated by κ statistics. RESULTS There were no significant differences in visual assessment. Interobserver agreement was almost perfect. CT values were almost equivalent between FBP and IR, whereas CNR with IR was significantly higher than that with FBP. %GGO significantly increased at low-dose levels with FBP; however, IR suppressed the elevation. CONCLUSION The confidence ratings of diagnoses of simulated lesions other than lung cancer on low-dose CT screening were not degraded with hybrid IR compared with FBP. ADVANCES IN KNOWLEDGE Hybrid IR did not degrade the confidence ratings of diagnoses on visual assessment and differential diagnoses based on CT value of mediastinal masses, and it showed the advantage of higher GGO conspicuity at low-dose level. Radiologists can analyse images of hybrid IR alone on low-dose CT screening for lung cancer.
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Affiliation(s)
- N Sakai
- 1 Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - H Yabuuchi
- 1 Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - M Kondo
- 2 Division of Radiological Technology, Department of Medical Technology, Kyushu University Hospital, Fukuoka, Japan
| | - Y Matsuo
- 3 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Kamitani
- 3 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - M Nagao
- 3 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - M Jinnouchi
- 3 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - M Yonezawa
- 3 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - T Kojima
- 1 Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Y Yano
- 1 Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - H Honda
- 3 Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Matsumoto T, Maeno Y, Kato H, Seko-Nakamura Y, Monma-Ohtaki J, Ishiba A, Nagao M, Aoki Y. 5-hydroxytryptamine- and dopamine-releasing effects of ring-substituted amphetamines on rat brain: a comparative study using in vivo microdialysis. Eur Neuropsychopharmacol 2014; 24:1362-70. [PMID: 24862256 DOI: 10.1016/j.euroneuro.2014.04.009] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Revised: 04/06/2014] [Accepted: 04/27/2014] [Indexed: 10/25/2022]
Abstract
Using in vivo microdialysis, a comparative study was conducted to examine the effects of amphetamine-related compounds (methamphetamine, MAP; 3,4-methylenedioxymethamphetamine, MDMA; p-methoxyamphetamine, PMA; p-methoxymethamphetamine, PMMA; 4-methylthioamphetamine, 4-MTA; 3,4,5-trimethoxyamphetamine, TMA; 2,5-dimethoxy-4-iodoamphetamine, DOI) on extracellular levels of serotonin (5-HT) and dopamine (DA). Dialysates were assayed using HPLC equipped with electrochemical detector following i.p. administration with each drug at a dose of 5 mg/kg. MAP was found to drastically and rapidly increase 5-HT and DA levels (870% and 1460%, respectively). PMA, PMMA, and 4-MTA slightly increased DA levels (150-290%) but remarkably increased 5-HT levels (540-900%). In contrast, TMA and DOI caused no detectable changes in levels of both monoamines. We observed that the potent DA-releasing action of MAP was remarkably decreased by introduction of methoxy or methylthio group at the para position (MAP vs. PMMA or 4-MTA), but introduction of two additional adjacent methoxy groups into PMA totally abolished its 5-HT-/DA-releasing action (PMA vs. TMA). In addition, para-mono-substituted compounds inhibited both monoamine oxidase (MAO) enzymes more strongly than other compounds; PMA and 4-MTA exhibited submicromolar IC50 values for MAO-A. On the other hand, TMA scarcely affected the activity of both MAO enzymes as well as extracellular levels of 5-HT and DA. In this comparative study, MDMA, PMA, and 4-MTA functioned similar to PMMA, a typical empathogen; these findings therefore could be helpful in clarifying the psychopharmacological properties of amphetamine-related, empathogenic designer drugs.
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Affiliation(s)
- T Matsumoto
- Criminal Investigation Laboratory, Aichi Prefectural Police H.Q., Sannomaru 2-chome 1-1, Naka-ku, Nagoya 460-8502, Japan; Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.
| | - Y Maeno
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - H Kato
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - Y Seko-Nakamura
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - J Monma-Ohtaki
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
| | - A Ishiba
- Criminal Investigation Laboratory, Aichi Prefectural Police H.Q., Sannomaru 2-chome 1-1, Naka-ku, Nagoya 460-8502, Japan
| | - M Nagao
- Department of Forensic Medicine, Graduate School of Biomedical Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-0037, Japan
| | - Y Aoki
- Department of Forensic Medicine, Nagoya City University Graduate School of Medical Sciences, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan
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Yabuuchi H, Matsuo Y, Tsukamoto H, Horiuchi T, Sunami S, Kamitani T, Jinnouchi M, Nagao M, Akashi K, Honda H. Evaluation of the extent of ground-glass opacity on high-resolution CT in patients with interstitial pneumonia associated with systemic sclerosis: Comparison between quantitative and qualitative analysis. Clin Radiol 2014; 69:758-64. [DOI: 10.1016/j.crad.2014.03.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 03/05/2014] [Accepted: 03/06/2014] [Indexed: 11/27/2022]
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Yano Y, Yabuuchi H, Kairada A, Tanaka N, Morishita J, Akasaka T, Matsuo Y, Kamitani T, Yamasaki Y, Nagao M, Sasaki M. Detectability of simulated interstitial pneumonia on chest radiographs: comparison between irradiation side sampling indirect flat-panel detector and computed radiography. Br J Radiol 2014; 87:20140075. [PMID: 24874767 DOI: 10.1259/bjr.20140075] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To compare the detectability of simulated interstitial pneumonia on chest radiographs between an irradiation side sampling indirect flat-panel detector (ISS-FPD) and computed radiography (CR). METHODS Simulated interstitial pneumonia findings (ground-glass opacity, reticular opacity and honeycomb lung) were superimposed on an anthropomorphic chest phantom. Chest radiographs were acquired under three exposure levels (4.0, 3.2 and 2.0 mAs) with an ISS-FPD and with CR. 5 thoracic radiologists evaluated 72 images for the presence or absence of a lesion over each of 6 areas. A total of 1296 observations were analysed in a receiver-operating characteristic analysis. A jackknife method was used for the statistical analysis. RESULTS The areas under the curves (AUCs) for the detection of simulated honeycomb lung obtained with the ISS-FPD were significantly larger than those obtained with CR at all exposure conditions. For the detection of simulated ground-glass opacity and reticular opacity, there were no significant differences between the two systems. In addition, the AUCs for the detectability of simulated honeycomb lung obtained with the ISS-FPD at all exposure levels were significantly larger than those obtained with CR at 4 mAs. CONCLUSION The ISS-FPD was superior to CR for the detection of simulated honeycomb lung. Provided that the chosen model is representative of interstitial pneumonia, the use of an ISS-FPD might reduce a patient's exposure dose during the detection of interstitial pneumonia. ADVANCES IN KNOWLEDGE The ISS-FPD has shown its advantage compared with CR in the detection of honeycombing, one sign of interstitial pneumonia.
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Affiliation(s)
- Y Yano
- 1 Department of Health Sciences, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Tohge R, Warabi Y, Takahashi M, Nagao M. Two cases of acute myelitis with idiopathic hypereosinophilic syndrome. Case Reports 2014; 2014:bcr-2014-204326. [DOI: 10.1136/bcr-2014-204326] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Kato K, Nagao M, Nakano S, Yunoki T, Hotta G, Yamamoto M, Matsumura Y, Ito Y, Takakura S, Chen F, Bando T, Matsuda Y, Matsubara K, Date H, Ichiyama S. Itraconazole prophylaxis for invasiveAspergillusinfection in lung transplantation. Transpl Infect Dis 2014; 16:340-3. [DOI: 10.1111/tid.12187] [Citation(s) in RCA: 13] [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] [Received: 04/22/2013] [Revised: 07/06/2013] [Accepted: 08/09/2013] [Indexed: 11/28/2022]
Affiliation(s)
- K. Kato
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - M. Nagao
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - S. Nakano
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - T. Yunoki
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - G. Hotta
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - M. Yamamoto
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - Y. Matsumura
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - Y. Ito
- Department of Respiratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - S. Takakura
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - F. Chen
- Department of Thoracic Surgery; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - T. Bando
- Department of Thoracic Surgery; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - Y. Matsuda
- Department of Pharmacy; Kyoto University Hospital; Kyoto Japan
| | - K. Matsubara
- Department of Pharmacy; Kyoto University Hospital; Kyoto Japan
| | - H. Date
- Department of Thoracic Surgery; Kyoto University Graduate School of Medicine; Kyoto Japan
| | - S. Ichiyama
- Department of Clinical Laboratory Medicine; Kyoto University Graduate School of Medicine; Kyoto Japan
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Matsumura Y, Tanaka M, Yamamoto M, Nagao M, Takakura S, Ito Y, Ichiyama S. P83 IncF replicon sequence typing of extended-spectrum beta-lactamase-producing ST131 and ST405 Escherichia coli clonal groups in Japan. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70328-5] [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: 11/16/2022]
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Kume D, Akahoshi S, Song J, Yamagata T, Wakimoto T, Nagao M, Matsueda S, Nagao N. Intermittent breath holding during moderate bicycle exercise provokes consistent changes in muscle oxygenation and greater blood lactate response. J Sports Med Phys Fitness 2013; 53:327-335. [PMID: 23715258] [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: 06/02/2023]
Abstract
AIM This study examined the effect of intermittent breath holding (IBH) on physiological response, including oxygenation in working muscle, to moderate-intensity exercise. METHODS Thirteen men performed bicycle exercise for 5 min at 65% of peak oxygen uptake with normal breathing (NB) and with IBH. Muscle oxygenation, concentration changes of oxyhemoglobin (ΔOxy-Hb), deoxyhemoglobin (ΔDeoxy-Hb) and total hemoglobin (ΔTotal-Hb), in the right vastus lateralis were continuously monitored using near-infrared spectroscopy (NIRS). Finger capillary blood samples were taken after exercise for analyzing blood lactate concentration (BLa). RESULTS NIRS parameters showed acute changes to each BH episode in the IBH condition (Total-Hb and ΔOxy-Hb decreased, ΔDeoxy-Hb increased). Accordingly, in the IBH condition, ΔOxy-Hb was lower (P<0.05) and ΔDeoxy-Hb was higher (P<0.05) compared to that in the NB condition, whereas there was no difference in ΔTotal-Hb in the both conditions. BLa levels were greater (P<0.05) in the IBH condition compare to the NB condition. CONCLUSION These results suggest that IBH during moderate-intensity exercise provokes consistent changes in muscle oxygenation, leading to lower tissue oxygenation. Our data also indicate that exercise with IBH induces higher BLa.
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Affiliation(s)
- D Kume
- Department of Health and Sports Science, Kawasaki University of Medical WelfareKurashiki, Japan.
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Nagao M. A multicentre analysis of epidemiology of the nosocomial bloodstream infections in Japanese university hospitals. Clin Microbiol Infect 2012; 19:852-8. [PMID: 23176224 DOI: 10.1111/1469-0691.12083] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [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: 09/07/2012] [Revised: 10/16/2012] [Accepted: 10/19/2012] [Indexed: 11/29/2022]
Abstract
Nosocomial bloodstream infections (BSIs) are an important cause of morbidity and mortality. The current study analysed data from a concurrent surveillance programme to examine the current epidemiological trends for nosocomial BSIs at 22 Japanese university hospitals from 1 April 2008 to 31 March 2012. The number of blood culture sets taken, the rate of multiple blood culture sets and the rates of antibiotic-resistant isolates among six major nosocomial BSI pathogens (Staphylococcus aureus, Enterococcus spp., Escherichia coli, Klebsiella spp., Pseudomonas aeruginosa, and Candida spp.) not including coagulase-negative staphylococci, were evaluated. The clinical characteristics of nosocomial BSIs caused by these pathogens were also collected for 2941 patients. The number of blood culture sets taken per bed increased during the 4-year study period (from 4.07 in 2008 to 5.37 in 2011), and the rates of multiple blood culture sets also increased (from 29.9% in 2008 to 50.0% in 2011). Methicillin resistance was detected in 50.2% of S. aureus isolates. The prevalence rates of extended-spectrum beta-lactamase-producing E. coli and Klebsiella spp. isolates increased annually during the study period, and the average prevalence rates were 12.3% and 5.8%, respectively. The overall crude mortality of nosocomial BSIs due to the six pathogens evaluated was 24.5% (43.2% in ICU settings and 20.5% in non-ICU settings). Thus, our multicentre study evaluated the current epidemiological trends for nosocomial BSIs, and we found that further efforts are needed to increase the use of multiple blood culture sets and improve the prognosis of nosocomial BSIs in Japanese university hospitals.
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Affiliation(s)
- M Nagao
- Department of Infection Control and Prevention, Kyoto University Hospital, Kyoto, Japan.
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Hatakenaka M, Yonezawa M, Nonoshita T, Nakamura K, Yabuuchi H, Shioyama Y, Nagao M, Matsuo Y, Kamitani T, Honda H. Acute Cardiac Impairment Associated With Concurrent Chemoradiation Therapy for Esophageal Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Shirai Y, Inagaki M, Yamaguchi M, Kambe T, Nagao M, Masuda S, Sasaki R. Effect of hypoxia duration on the oxygen-dependent production of a recombinant protein, β-galactosidase, by an animal cell line, F6D2, with a hypoxia-inducible enhancer. Cytotechnology 2012; 25:71-7. [PMID: 22358881 DOI: 10.1023/a:1007911816292] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Expression of specific genes is a strategy of animal cells for adaptation to oxygen deficiency and the mechanism underlying the hypoxic activation of gene expression may be useful for efficient production of recombinant proteins by animal cells, because oxygen is a limiting factor in animal cell cultures. We prepared an animal cell line harboring the plasmid in which expression of a reporter gene, β-galactosidase, is controlled by an enhancer responsible for the hypoxic activation of gene transcription. The purpose of this paper is to understand this hypoxic production of recombinant proteins quantitatively by a mathematical model originally developed based on the following hypotheses; 1 lacZ (the reporter gene) is transcribed after HIF-1 protein complex is bound to the hypoxic enhancer, 2. β-galactosidase synthesis rate is limited at the transcription of lacZ, 3. HIF-1 is an inactive form under a normal oxygen concentration, 4. Oxygen works as a repressor in the synthesis of HIF-1 protein, 5. Both β-galactosidase and HIF-1 are decomposed according to the first order reaction. The effects of hypoxic duration as well as oxygen concentration on the β-galactosidase production were successfully predicated by the model.
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Masuda S, Kada E, Nagao M, Sasaki R. In vitro neuroprotective action of recombinant rat erythropoietin produced by astrocyte cell lines and comparative studies with erythropoietin produced by Chinese hamster ovary cells. Cytotechnology 2012; 31:179-84. [PMID: 19003139 DOI: 10.1023/a:1008028423510] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
In the central nervous system, astrocytes produce erythropoietin (Epo) and neurons express its receptor. To examine whether or not the brain Epo protects the in vitro cultured neurons from glutamate-induced cell death, we established rat astrocyte cell lines containing the plasmid for production of recombinant rat Epo. Epo partially purified from the culture medium showed a neuroprotective effect similar to that of rat Epo produced by Chinese hamster ovary (CHO) cells. Comparison was made in some other properties between Epo produced by these astrocyte cell lines and that by CHO cells.
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Moon SK, Takeuchi S, Kambe T, Tsuchiya T, Masuda S, Nagao M, Sasaki R. Erythropoietin enhancer stimulates production of a recombinant protein by Chinese hamster ovary (CHO) cells under hypoxic condition. Cytotechnology 2012; 25:79-88. [PMID: 22358882 DOI: 10.1023/a:1007963800362] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Oxygen is a limiting nutrient in animal cell culture and its supply is still worthy of improvement for production of useful proteins with a high efficiency. From a different point of view, development of the system by which a high productivity can be maintained even under hypoxic condition as well as under normoxic condition may be important. A number of hypoxia-inducible genes have been found in eucaryotic cells and the induction in most cases, if not all, is due to hypoxic activation of the gene transcription. Transcription of erythropoietin gene is highly hypoxia-inducible and the induction is achieved by binding of a protein, which is widely distributed in animal cells, to a short DNA stretch (erythropoietin enhancer) in the 3' flanking region of erythropoietin gene. Using a hepatoma cell line (Hep3B) that produces the endogenous erythropoietin in an oxygen-dependent manner and Chinese hamster ovary cells that have been widely used for production of recombinant proteins, we show that, under hypoxic condition, the erythropoietin enhancer can activate not only the promoter of erythropoietin gene but also promoters of cytomegalovirus early genes and eucaryotic polypeptide chain elongation factor gene, both of which are very active in animal cells under normoxic condition.
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Yamamoto M, Nagao M, Matsumura Y, Hotta G, Matsushima A, Ito Y, Takakura S, Ichiyama S. Regional dissemination of Acinetobacter species harbouring metallo-β-lactamase genes in Japan. Clin Microbiol Infect 2012; 19:729-36. [PMID: 23009350 DOI: 10.1111/1469-0691.12013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Metallo-β-lactamase (MBL) producers have been reported among the various Acinetobacter species worldwide. In this study, the epidemiology and molecular characteristics of carbapenemase-encoding genes and mobile elements were studied to analyse the regional dissemination of MBL genes in Acinetobacter species. From January 2001 to December 2006, 48 Acinetobacter isolates harbouring MBL genes identified from five hospitals in Kyoto and Shiga Prefecture, Japan were collected and analysed. The partial rpoB gene or the 16S-23S ribosomal RNA intergenic spacer region was sequenced to obtain a species-level identification. Molecular typing using pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) was performed. Twenty-five Acinetobacter pittii isolates were divided into eight PFGE types and five sequence types (STs) using MLST. Nine Acinetobacter bereziniae isolates belonged to five PFGE types. Five Acinetobacter nosocomialis isolates were divided into two PFGE types and two STs. Three unclassified Acinetobacter species isolates were divided into two PFGE types. Eighteen of the 25 A. pittii isolates belonged to ST119 and were identified from four hospitals. The bla(IMP-19) gene was detected in 41 of 48 isolates, including all of the A. pittii ST119 isolates. The bla(IMP-1) and bla(IMP-11) genes were detected in four and three isolates, respectively. The MBL genes were all embedded within a class 1 integron as a gene cassette array: bla(IMP-19) -aac(6')-31-bla(OXA-21) -aadA1, catB8-like/aacA4-bla(IMP-1) and bla(IMP-11). This study is the first report demonstrating the regional dissemination of MBL-producing Acinetobacter species. A. pittii ST119 harbouring blaIMP-19 was widely spread throughout the Kyoto-Shiga region.
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Affiliation(s)
- M Yamamoto
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan.
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Matsumura Y, Ito Y, Iinuma Y, Yasuma K, Yamamoto M, Matsushima A, Nagao M, Takakura S, Ichiyama S. Quantitative real-time PCR and the (1 → 3)-β-d-glucan assay for differentiation between Pneumocystis jirovecii pneumonia and colonization. Clin Microbiol Infect 2012; 18:591-7. [DOI: 10.1111/j.1469-0691.2011.03605.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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Matsumura Y, Nagao M, Iguchi M, Yagi T, Komori T, Fujita N, Yamamoto M, Matsushima A, Takakura S, Ichiyama S. Molecular and clinical characterization of plasmid-mediated AmpC β-lactamase-producing Escherichia coli bacteraemia: a comparison with extended-spectrum β-lactamase-producing and non-resistant E. coli bacteraemia. Clin Microbiol Infect 2012; 19:161-8. [PMID: 22332968 DOI: 10.1111/j.1469-0691.2012.03762.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Plasmid-mediated AmpC β-lactamase-producing Escherichia coli (AmpC-E) bacteraemia was characterized by comparison with bacteraemia caused by extended-spectrum β-lactamase (ESBL)-producing E. coli (ESBL-E) and non-resistant E. coli (NR-E) in the era of the worldwide spread of the CTX-M-15-producing O25b-ST131-B2 clone. Of 706 bloodstream E. coli isolates collected between 2005 and 2010 in three Japanese university hospitals, 111 ESBL screening-positive isolates were analysed for AmpC and ESBL genes by PCR. A case-control study was performed in which the cases consisted of all of the patients with AmpC-E bacteraemia. Phylogenetic groups, sequence types and O25b serotype were determined. Twenty-seven AmpC-E isolates (26 of which were of the CMY-2 type) were identified, and 54 ESBL-E and 54 NR-E isolates were selected for the controls. Nineteen AmpC-E isolates were also positive for ESBL. CTX-M-14 was the most prevalent ESBL type among both the AmpC-E and ESBL-E isolates. The O25b-ST131-B2 clone was the most prevalent among the ESBL-E isolates (26%) and the second most prevalent among the NR-E isolates (13%), but only one O25b-ST131-B2 clone was found among the AmpC-E isolates. Twenty-three different sequence types were identified among the AmpC-E isolates. When compared with bacteraemia with ESBL-E, previous isolation of multidrug-resistant bacteria and intravascular catheterization were independently associated with a lower risk for AmpC-E. When compared with NR-E bacteraemia, prior use of antibiotics was the only significant risk factor for AmpC-E. Unlike the spread of the O25b-ST131-B2 clone between ESBL-E and NR-E, the AmpC-E isolates were not dominated by any specific clone.
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Affiliation(s)
- Y Matsumura
- Department of Clinical Laboratory Medicine, Kyoto University Graduate School of Medicine, Sakyo-ku, Kyoto, Japan.
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Machino Y, Nagao M, Fujisawa T. Blunted Emotional Availability In Mothers Who Have Food Allergy Children :an Analysis By “I Feel Pictures” Test. J Allergy Clin Immunol 2012. [DOI: 10.1016/j.jaci.2011.12.535] [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: 10/14/2022]
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Nagao M, Hayashi H, Matsubara S. 3.349 MIXED LINEAGE KINASE 2 AND HIPPOCALCIN ARE LOCALIZED IN LEWY BODIES OF PARKINSON'S DISEASE. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70982-8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Matsumura Y, Yamamoto M, Matsushima A, Nagao M, Ito Y, Takakura S, Ichiyama S. Cefotaxime for the detection of extended-spectrum β-lactamase or plasmid-mediated AmpC β-lactamase and clinical characteristics of cefotaxime-non-susceptible Escherichia coli and Klebsiella pneumoniae bacteraemia. Eur J Clin Microbiol Infect Dis 2011; 31:1931-9. [DOI: 10.1007/s10096-011-1523-4] [Citation(s) in RCA: 5] [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] [Received: 10/31/2011] [Accepted: 12/13/2011] [Indexed: 01/31/2023]
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Matsushima A, Takakura S, Yamamoto M, Matsumura Y, Shirano M, Nagao M, Ito Y, Iinuma Y, Shimizu T, Fujita N, Ichiyama S. Regional spread and control of vancomycin-resistant Enterococcus faecium and Enterococcus faecalis in Kyoto, Japan. Eur J Clin Microbiol Infect Dis 2011; 31:1095-100. [PMID: 21968723 DOI: 10.1007/s10096-011-1412-x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2011] [Accepted: 08/30/2011] [Indexed: 12/01/2022]
Abstract
The purpose of this investigation was to control the post-outbreak prevalence of vancomycin-resistant enterococci (VRE) in the affected Kyoto region. The study period was from 2005 to 2010. Faecal samples were subjected to VRE screening, and vancomycin resistance genes were detected by polymerase chain reaction (PCR). The genotype was determined by pulsed-field gel electrophoresis (PFGE) of genomic DNA digested with SmaI and by multilocus sequence typing (MLST). A VRE control programme was established in 2006, consisting of a laboratory-based faecal VRE screening system, annual surveillance of hospital inpatients and the promotion of adequate infection control measures. vanA-Enterococcus faecium, vanB-E. faecium and vanB-E. faecalis were detected at 35, 12 and 5 hospitals, respectively. Genotype analysis revealed that all of the vancomycin-resistant E. faecium isolates obtained since 2005 belonged to ST78, and that clonally related vanB-E. faecalis of ST64 had spread to three hospitals. The rate of faecal VRE carriage among the patients enrolled in the annual surveillance increased until 2007, when it reached 24 (1.2%) of the 2,035 enrolled patients. The rate began to decrease in 2008 and, by 2010, reached a low of 4 (0.17%) of the 2,408 enrolled patients. While VRE did spread within the Kyoto region, the VRE control programme succeeded in controlling the overall VRE spread.
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Affiliation(s)
- A Matsushima
- Department of Infection Control and Prevention, Kyoto University Hospital, 54 Shogoin-Kawaharacho, Sakyo, Kyoto, 6068507, Japan.
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