1
|
Sugimoto M, Kaneko N, Oyamada M, Tomita A, Sato M. Eye-tracking analysis for situation awareness of incontinence pad changing during older adult nursing training: An observational study. Nurse Educ Pract 2024; 76:103935. [PMID: 38442654 DOI: 10.1016/j.nepr.2024.103935] [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: 01/16/2024] [Revised: 01/23/2024] [Accepted: 02/27/2024] [Indexed: 03/07/2024]
Abstract
AIM This study aims to investigate eye tracking in the practical training of incontinence pad change, which is commonly required in older adult nursing. BACKGROUND Some competencies possessed by skilled and experienced personnel are difficult to verbalize into textbooks. However, this is crucial for education, especially nursing practice education. Eye-gaze analysis is one such tool that can aid the efficient transfer of knowledge to students. Therefore, eye-gaze analysis, a novel technology for visualizing situational awareness and decision-making, has recently gained traction in healthcare. DESIGN An observation study METHODS: Ten nursing faculty members and 13 nursing students with prior incontinence pad change experience participated in this study using an older adult simulator. There were two groups of students - S1 with more recent experience in older adult care and incontinence pad changing and S2 with less. Areas of interest (AOIs) during incontinence pad preparation and fitting were determined based on gaze fixation and the time spent fixating on these areas was compared. RESULTS Students took longer than nursing faculty members. When visualizing the eye movements between the AOIs in the network, the faculty nurses and S1 alternated their gaze between the new incontinence pad and the buttocks and between other AOIs. Simultaneously, S2 tended to gaze or stare only at the new incontinence pad. CONCLUSION The presented data may help interpret visual-based situational awareness and establish effective nursing education, especially in acquiring skills that are difficult to verbalize.
Collapse
Affiliation(s)
- Masahiro Sugimoto
- Institute for Advanced Biosciences, Keio University, Tsuruoka 997-0052, Japan; Institute of Medical Sciences, Tokyo Medical University, Tokyo, Shinjuku 160-0022, Japan.
| | - Naomi Kaneko
- Faculty of Nursing, Kanagawa Institute of Technology, Kanagawa 243-0292, Japan.
| | - Michiko Oyamada
- Faculty of Human Care Department, Tohto University, 1-1 Hinode-cho, Numazu City, Shizuoka 410-0032, Japan.
| | - Atsumi Tomita
- Institute of Medical Sciences, Tokyo Medical University, Tokyo, Shinjuku 160-0022, Japan.
| | - Mitsue Sato
- Department of Nursing, Kiryu University, Midori 379-2392, Japan.
| |
Collapse
|
2
|
Ito Y, Kaneko N, Yoshida M, Nakayama H. Evaluation of a novel Clostridioides difficile-selective growth broth under aerobic conditions. Diagn Microbiol Infect Dis 2023; 107:116020. [PMID: 37536259 DOI: 10.1016/j.diagmicrobio.2023.116020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 06/22/2023] [Accepted: 07/08/2023] [Indexed: 08/05/2023]
Abstract
A newly developed Clostridioides difficile-selective growth broth, which can be cultured under aerobic conditions, was found to have a sensitivity/specificity (98%/89%) comparable to conventional anaerobic culture methods. This might be a powerful tool for diagnosing Clostridioides difficile infection in resource-limited regions and health care settings in the future.
Collapse
Affiliation(s)
- Yukitaka Ito
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan; Department of Infection and prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan.
| | - Naomi Kaneko
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Mieko Yoshida
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Haruo Nakayama
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan; Department of Infection and prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| |
Collapse
|
3
|
Ito Y, Inoue N, Kaneko N, Otsuka M, Yamasaki S, Yoshikawa M. A case of fungal otitis externa caused by coinfection of Candida auris and Aspergillus flavus. J Infect Chemother 2023:S1341-321X(23)00105-8. [PMID: 37094768 DOI: 10.1016/j.jiac.2023.04.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 03/27/2023] [Accepted: 04/19/2023] [Indexed: 04/26/2023]
Abstract
Fungal otitis externa is a disease encountered occasionally and is caused mostly by Aspergillus or Candida spp. We report a woman with fungal otitis externa who also had typical findings in the external auditory canal. The results of a culture showed coinfection with Candida auris and Aspergillus flavus. Identification of both species was performed by sequencing analysis of the 26S rDNA (D1/D2) region. Additionally, the newly developed CHROMagar™ Candida Plus medium was a useful tool for the easy and rapid identification of C. auris. To the best of our knowledge, this is the first report of fungal otitis externa caused by coinfection with C. auris and A. flavus. This case showed good susceptibility to many antifungal drugs and fortunately had a good clinical course with 1% bifonazole cream, which was applied to the fungal coinfection. Notably, C. auris is a multidrug-resistant yeast-like fungus. The increase in drug-resistant fungi and co-infections caused by these pathogens can make the diagnosis and treatment more complex and difficult. To solve these problems, performing rapid and accurate identification and susceptibility testing using chromogenic medium and molecular biological analysis would be useful.
Collapse
Affiliation(s)
- Yukitaka Ito
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
| | - Natsuki Inoue
- Department of Otorhinolaryngology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
| | - Naomi Kaneko
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
| | - Masanobu Otsuka
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
| | - Shintaro Yamasaki
- Department of Otorhinolaryngology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
| | - Mamoru Yoshikawa
- Department of Otorhinolaryngology, Toho University Ohashi Medical Center, 2-22-36 Ohashi, Meguro-ku, Tokyo, 153-8515, Japan.
| |
Collapse
|
4
|
Ito Y, Aoki K, Ishii Y, Nakayama H, Otsuka M, Kaneko N, Yoshida M, Tateda K, Matsuse H. Whole-Genome Sequencing Analysis of blaNDM-5/IncX3 Plasmid Estimated to be Conjugative-Transferred in the Gut. Microb Drug Resist 2022; 28:539-544. [PMID: 35544685 DOI: 10.1089/mdr.2021.0197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
We characterized plasmids carrying blaNDM-5 detected in Escherichia coli isolated from the infection site and stool sample of a Japanese patient, with no international travel history, by whole-genome sequencing (WGS). WGS was performed using MiSeq and MinlON sequencer followed by hybrid de novo assembly. blaNDM-5 was detected on IncX3 (blaNDM-5/IncX3) plasmids; pMTY18530-4_IncX3 in E. coli TUM18530 isolated from a wound above the pubis; pMTY18780-5_IncX3 and pMTY18781-1_IncX3 in E. coli TUM18780 and TUM18781, respectively, isolated from stool. These three plasmids resembled each other and pGSH8M-2-4, previously detected in E. coli isolated from a Tokyo Bay water sample. E. coli TUM18530 and TUM18780 belonged to sequence type (ST) 1011 and had only two single nucleotide polymorphisms on the core-genome, whereas TUM18781 belonged to ST2040. Three blaNDM-5/IncX3 plasmids (pMTY18530-4_IncX3, pMTY18780-5_IncX3, and pMTY18781-1_IncX3) exhibited conjugative transfer in vitro at an average frequency of 1.71 × 10-3 per donor cell. The transconjugant was resistant to only β-lactams, including carbapenem, except aztreonam. Similarity of the blaNDM-5/IncX3 plasmids isolated from our patient compared with that isolated from the Tokyo bay water sample suggested that the plasmids may have already spread throughout the Japanese community. The blaNDM-5/IncX3 plasmid exhibited potential for easy transmission to different strains in the patient's intestine.
Collapse
Affiliation(s)
- Yukitaka Ito
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Kotaro Aoki
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Ota, Tokyo, Japan
| | - Yoshikazu Ishii
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Ota, Tokyo, Japan
| | - Haruo Nakayama
- Department of Infection and Prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Masanobu Otsuka
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Naomi Kaneko
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Mieko Yoshida
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Kazuhiro Tateda
- Department of Microbiology and Infectious Diseases, Toho University School of Medicine, Ota, Tokyo, Japan
| | - Hiroto Matsuse
- Department of Infection and Prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| |
Collapse
|
5
|
Ito Y, Nakayama H, Niitsu Y, Kaneko N, Otsuka M, Sawada Y, Takeuchi Y, Sekido N. The first case of Veillonella atypica bacteremia in a patient with renal pelvic tumor. Anaerobe 2021; 73:102491. [PMID: 34861365 DOI: 10.1016/j.anaerobe.2021.102491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 07/04/2021] [Revised: 10/25/2021] [Accepted: 11/28/2021] [Indexed: 11/26/2022]
Abstract
We report the first case of bacteremia caused by Veillonella atypica in a morbid elderly female patient who developed obstructive pyelonephritis. She was treated with ceftriaxone and ureteral stenting; this is the first report of V. atypica infection in humans. Species identification was performed by multiplex PCR and sequencing of rpoB. The strain was susceptible to metronidazole and clindamycin but resistant to benzylpenicillin, ampicillin, ampicillin/sulbactam, and moxifloxacin.
Collapse
Affiliation(s)
- Yukitaka Ito
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan; Department of Infection and Prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan.
| | - Haruo Nakayama
- Department of Infection and Prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Yasuo Niitsu
- Department of Urology, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Naomi Kaneko
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Masanobu Otsuka
- Division of Clinical Microbiology Laboratory, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan; Department of Infection and Prevention, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Yoshitomo Sawada
- Department of Urology, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Yasuharu Takeuchi
- Department of Urology, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| | - Noritoshi Sekido
- Department of Urology, Toho University Ohashi Medical Center, Meguro, Tokyo, Japan
| |
Collapse
|
6
|
Beaman CB, Kaneko N, Meyers PM, Tateshima S. A Review of Robotic Interventional Neuroradiology. AJNR Am J Neuroradiol 2021; 42:808-814. [PMID: 33541906 DOI: 10.3174/ajnr.a6976] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 10/26/2020] [Indexed: 12/20/2022]
Abstract
Robotic interventional neuroradiology is an emerging field with the potential to enhance patient safety, reduce occupational hazards, and expand systems of care. Endovascular robots allow the operator to precisely control guidewires and catheters from a lead-shielded cockpit located several feet (or potentially hundreds of miles) from the patient. This has opened up the possibility of expanding telestroke networks to patients without access to life-saving procedures such as stroke thrombectomy and cerebral aneurysm occlusion by highly-experienced physicians. The prototype machines, first developed in the early 2000s, have evolved into machines capable of a broad range of techniques, while incorporating newly automated maneuvers and safety algorithms. In recent years, preliminary clinical research has been published demonstrating the safety and feasibility of the technology in cerebral angiography and intracranial intervention. The next step is to conduct larger, multisite, prospective studies to assess generalizability and, ultimately, improve patient outcomes in neurovascular disease.
Collapse
Affiliation(s)
- C B Beaman
- Department of Neurology (C.B.B.), Columbia University Irving Medical Center, New York, New York
| | - N Kaneko
- Department of Radiological Sciences (N.K., S.T.), David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| | - P M Meyers
- Department of Radiology and Neurological Surgery (P.M.M.), Columbia University Irving Medical Center, New York, New York
| | - S Tateshima
- Department of Radiological Sciences (N.K., S.T.), David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California
| |
Collapse
|
7
|
Liu M, Bel E, Kornmann O, Humbert M, Kaneko N, Martin N, Gilson M, Price R, Yancey S, Moore W. P211 CLINICIAN/PATIENT PERCEPTION: ASTHMA SEVERITY DECREASES AND RESPONSE INCREASES WITH CONTINUING VERSUS STOPPING LONG-TERM MEPOLIZUMAB (COMET). Ann Allergy Asthma Immunol 2020. [DOI: 10.1016/j.anai.2020.08.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
8
|
Della Torre E, Rovati L, Monno A, Maehara T, Kaneko N, Lanzillotta M, Pedica F, Doglioni C, Pillai S, Manfredi A. AB0154 MERTK AND THE RESOLUTION OF INFLAMMATION IN IGG4-RELATED DISEASE. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.2432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:IgG4-Related Disease (IgG4-RD) is characterized by fibrotic lesions, serum IgG4 elevation, and prompt response to glucocorticoids. B and T lymphocytes are considered the initiators of tissue inflammation in IgG4-RD, but the prominent stromal reaction observed at disease sites suggest that a dysregulation of processes involved in the resolution of inflammation could be pathologically relevant as well. Mer receptor tyrosine kinase (MerTK) and its ligands protein S (Pros1) have a pivotal role in the resolution of inflammation through the activation of a well-characterized signaling pathway that ultimately dampens the immune response and promotes the recovery of tissue function. MerTK and the processes involved in the resolution of inflammation have never been addressed in IgG4-RD.Objectives:To investigate MerTK involvement in the pathogenesis of IgG4-RD by evaluating (a) the expression of MerTK and of its endogenous ligands in IgG4-RD tissues; (b) the presence of circulating precursors of MerTK+ cells infiltrating IgG4-RD lesions in the peripheral blood of IgG4-RD patients; (c) the effects of immunosuppressive therapies on MerTK expression in IgG4-RD tissues.Methods:Three distinct cohorts of IgG4-RD patients were included in this study. 8 active patients were used for immunohistochemistry studies for MerTK expression. 16 IgG4-RD and 14 Sjögren syndrome patients, together with 6 control tonsils, were used for multicolor immunofluorescence studies and TissueQuest software quantification of the expression of MerTK, CD68, CD163, Pros1, Gas6, CD4, SLAMF7, CD19, IgG4, cleaved caspase-3. 10 untreated IgG4-RD patients were used to evaluate MerTK expression in circulating monocytes subsets and fibrocytes by flow cytometry.Results:MerTK was highly expressed in IgG4-RD affected organs. MerTK+ cells accounted on average for 16% (range 5-35%) of all cells in the tissue, and the majority of them expressed CD68,reflecting a monocyte-macrophage origin. 33.5 % (interquartile range (IQR) 26-41%) of MerTK+ cells co-expressed CD68 and CD163, while 30.5% (IQR 19-41.5%) expressed CD68 but not CD163. CD68+MerTK+ cells displayed two main morphological appearances, compatible with those of macrophages and of myofibroblasts. In addition, MerTK+ cell number was significantly increased in salivary glands from IgG4-RD patients compared to Sjögren syndrome (p < 0.0001). Circulating precursors of CD68+MerTK+ cells infiltrating IgG4-RD lesions were identified by flow cytometery in the peripheral blood of patients with active IgG4-RD as MerTK+ populations of intermediate monocytes, nonclassical monocytes and collagen expressing fibrocytes. MerTK ligand Pros1 was exposed on 52% (IQR 42-57%) of infiltrating B lymphocytes, 74% (IQR 54-89%) of infiltrating T lymphocytes, and, likely, on apoptotic cells that were detected in IgG4-RD tissues. CD68+MerTK+ cells were found in physical contact with Pros1+ cells in IgG4-RD lesions and their number decreased by 56% after successful treatment with rituximab.Conclusion:MerTK is abundant in IgG4-RD affected organs and is preferentially expressed on CD68+ macrophages and myofibroblasts that infiltrate IgG4-RD lesions. MerTK+ cells might interact with apoptotic cells and Pros1 expressing T and B lymphocytes in IgG4-RD tissues, leading to the persistent activation of processes involved in the resolution of inflammation and promoting the development of tissue fibrosis.Disclosure of Interests:None declared
Collapse
|
9
|
Arikawa E, Kaneko N, Nohara K, Yamaguchi T, Mitsuyama M, Sakai T. Influence of Olfactory Function on Appetite and Nutritional Status in the Elderly Requiring Nursing Care. J Nutr Health Aging 2020; 24:398-403. [PMID: 32242207 DOI: 10.1007/s12603-020-1334-3] [Citation(s) in RCA: 7] [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] [Indexed: 12/22/2022]
Abstract
OBJECTIVE To investigate olfactory function in elderly subjects requiring nursing care to clarify its association with appetite and nutritional status. SETTING Facility for the elderly requiring nursing care. PARTICIPANTS The subjects were 158 elderly people requiring nursing care and 37 elderly people not requiring nursing care. MEASUREMENTS Experiment I: Olfactory function and factors (cognitive function, appetite, and nutritional status) that may be associated with it were compared between the elderly subjects requiring nursing care and those not requiring nursing care using covariance analysis in consideration of age. For evaluation, the OSIT-J was used for olfactory function, the HDS-R for cognitive function, the CNAQ for appetite, and BMI for nutritional status. Experiment II: The subjects were the same elderly subjects requiring nursing care in Experiment I, and food intake was surveyed in addition to the OSIT-J, HDS-R, CNAQ, and BMI. A univariate linear regression analysis was performed with OSIT-J as the response variable, and age, HDS-R, CNAQ, BMI, and food intake as the explanatory variables. RESULTS Experiment I: On covariance analysis, the OSIT-J score was significantly lower for the elderly subjects requiring nursing care than for those not requiring nursing care (p<0.01). The mean score was 8 or lower in both groups, demonstrating lower olfactory function in both groups. Regarding factors that may be associated with olfactory function, a significant difference was noted in the HDS-R (p<0.01), confirming significantly lower cognitive function in the elderly subjects requiring nursing care. No significant difference was noted in the CNAQ or BMI. Experiment II: On a univariate linear regression analysis, an association with the OSIT-J was noted for age and HDS-R. Age was inversely correlated and the HDS-R was positively correlated. Factors associated with lower olfactory function in the elderly subjects requiring nursing were age and cognitive function, whereas appetite, nutritional status, and food intake were not associated. CONCLUSION Olfactory function in elderly subjects requiring nursing care was poorer than that in those not requiring nursing care, suggesting that aging and cognitive decline are associated with lower olfactory function. In addition, no association of lower olfactory function with appetite, nutritional status, or food intake was noted in the elderly subjects requiring nursing care.
Collapse
Affiliation(s)
- E Arikawa
- Kanji Nohara, Department of Oral-facial Disorders, Osaka University Graduate School of Dentistry, 1-8 Yamada-Oka, Suita, Osaka 565-0871, Japan, , Tel: +81-06-6879-2278, Fax: +81-06-6879-2279
| | | | | | | | | | | |
Collapse
|
10
|
Niswati A, Yusnaini S, Utomo M, Dermiyati, Arif MAS, Haryani S, Kaneko N. Long-term organic mulching and no-tillage practice increase population and biomass of earthworm in sugarcane plantation. ACTA ACUST UNITED AC 2018. [DOI: 10.1088/1755-1315/215/1/012034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
11
|
Kaneko N, Herranz-Pérez V, Otsuka T, Sano H, Ohno N, Omata T, Nguyen HB, Thai TQ, Nambu A, Kawaguchi Y, García-Verdugo JM, Sawamoto K. New neurons use Slit-Robo signaling to migrate through the glial meshwork and approach a lesion for functional regeneration. Sci Adv 2018; 4:eaav0618. [PMID: 30547091 PMCID: PMC6291311 DOI: 10.1126/sciadv.aav0618] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/11/2018] [Indexed: 06/09/2023]
Abstract
After brain injury, neural stem cell-derived neuronal precursors (neuroblasts) in the ventricular-subventricular zone migrate toward the lesion. However, the ability of the mammalian brain to regenerate neuronal circuits for functional recovery is quite limited. Here, using a mouse model for ischemic stroke, we show that neuroblast migration is restricted by reactive astrocytes in and around the lesion. To migrate, the neuroblasts use Slit1-Robo2 signaling to disrupt the actin cytoskeleton in reactive astrocytes at the site of contact. Slit1-overexpressing neuroblasts transplanted into the poststroke brain migrated closer to the lesion than did control neuroblasts. These neuroblasts matured into striatal neurons and efficiently regenerated neuronal circuits, resulting in functional recovery in the poststroke mice. These results suggest that the positioning of new neurons will be critical for functional neuronal regeneration in stem/progenitor cell-based therapies for brain injury.
Collapse
Affiliation(s)
- N. Kaneko
- Department of Developmental and Regenerative Biology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - V. Herranz-Pérez
- Laboratory of Comparative Neurobiology, Instituto Cavanilles, Universidad de Valencia, CIBERNED, C/Catedrático José Beltrán, 2, Paterna, 46980 Valencia, Spain
- Predepartamental Unit of Medicine, Faculty of Health Sciences, Universitat Jaume I, Q-6250003-H Av. de Vicent Sos Baynat, s/n, 12071 Castelló de la Plana, Spain
| | - T. Otsuka
- Division of Cerebral Circuitry, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
- Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
| | - H. Sano
- Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
- Division of System Neurophysiology, National Institute for Physiological Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - N. Ohno
- Department of Anatomy, Division of Histology and Cell Biology, Jichi Medical University, School of Medicine, 3311-1 Yakushiji, Shimotsuke, Tochigi 329-0498, Japan
- Division of Neurobiology and Bioinformatics, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - T. Omata
- Department of Developmental and Regenerative Biology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
| | - H. B. Nguyen
- Division of Neurobiology and Bioinformatics, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
- Department of Anatomy, Faculty of Medicine, University of Medicine and Pharmacy (UMP), Ho Chi Minh City 700000, Vietnam
| | - T. Q. Thai
- Division of Neurobiology and Bioinformatics, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| | - A. Nambu
- Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
- Division of System Neurophysiology, National Institute for Physiological Sciences, 38 Nishigonaka, Myodaiji, Okazaki, Aichi 444-8585, Japan
| | - Y. Kawaguchi
- Division of Cerebral Circuitry, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
- Department of Physiological Sciences, SOKENDAI (The Graduate University for Advanced Studies), Okazaki, Aichi 444-8585, Japan
| | - J. M. García-Verdugo
- Laboratory of Comparative Neurobiology, Instituto Cavanilles, Universidad de Valencia, CIBERNED, C/Catedrático José Beltrán, 2, Paterna, 46980 Valencia, Spain
| | - K. Sawamoto
- Department of Developmental and Regenerative Biology, Nagoya City University Graduate School of Medical Sciences, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, Aichi 467-8601, Japan
- Division of Neural Development and Regeneration, National Institute for Physiological Sciences, 5-1 Higashiyama, Myodaiji, Okazaki, Aichi 444-8787, Japan
| |
Collapse
|
12
|
Tanaka H, Nakatani E, Fukutomi Y, Sekiya K, Kaneda H, Iikura M, Yoshida M, Takahashi K, Tomii K, Nishikawa M, Kaneko N, Sugino Y, Shinkai M, Ueda T, Tanikawa Y, Shirai T, Hirabayashi M, Aoki T, Kato T, Iizuka K, Fujii M, Taniguchi M. Identification of patterns of factors preceding severe or life-threatening asthma exacerbations in a nationwide study. Allergy 2018; 73:1110-1118. [PMID: 29197099 PMCID: PMC6668009 DOI: 10.1111/all.13374] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/27/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND Reducing near-fatal asthma exacerbations is a critical problem in asthma management. OBJECTIVES To determine patterns of factors preceding asthma exacerbations in a real-world setting. METHODS In a nationwide prospective study of 190 patients who had experienced near-fatal asthma exacerbation, cluster analysis was performed using asthma symptoms over the 2-week period before admission. RESULTS Three distinct clusters of symptoms were defined employing the self-reporting of a visual analogue scale. Cluster A (42.1%): rapid worsening within 7.4 hours from moderate attack to admission, young to middle-aged patients with low Body mass index and tendency to depression who had stopped anti-asthma medications, smoked, and hypersensitive to environmental triggers and furred pets. Cluster B (40.0%): fairly rapid worsening within 48 hours, mostly middle-aged and older, relatively good inhaled corticosteroid (ICS) or ICS/long-acting beta-agonist (LABA) compliance, and low perception of dyspnea. Cluster C (17.9%): slow worsening over 10 days before admission, high perception of dyspnea, smokers, and chronic daily mild-moderate symptoms. There were no differences in overuse of short-acting beta-agonists, baseline asthma severity, or outcomes after admission for patients in these 3 clusters. CONCLUSION To reduce severe or life-threatening asthma exacerbation, personalized asthma management plans should be considered for each cluster. Improvement of ICS and ICS/LABA compliance and cessation of smoking are important in cluster A. To compensate for low perception of dyspnea, asthma monitoring of peak expiratory flow rate and/or exhaled nitric oxide would be useful for patients in cluster B. Avoidance of environmental triggers, increase usual therapy, or new anti-type 2 response-targeted therapies should be considered for cluster C.
Collapse
Affiliation(s)
- H. Tanaka
- NPO Sapporo Cough Asthma, and Allergy CenterSapporoJapan
- Formerly at the Department of Respiratory Medicine and AllergologySapporo Medical University School of MedicineSapporoJapan
| | - E. Nakatani
- Translational Research Informatics CenterFoundation for Biomedical Research and InnovationKobeJapan
- Department of Biostatistics and Data ScienceOsaka University Graduate School of MedicineSuitaJapan
| | - Y. Fukutomi
- Clinical Research Center for Allergology and RheumatologySagamihara National HospitalSagamiharaJapan
| | - K. Sekiya
- Clinical Research Center for Allergology and RheumatologySagamihara National HospitalSagamiharaJapan
| | - H. Kaneda
- Department of Biostatistics and Data ScienceOsaka University Graduate School of MedicineSuitaJapan
| | - M. Iikura
- Department of Respiratory MedicineNational Center for Global Health and MedicineTokyoJapan
| | - M. Yoshida
- Division of Respiratory MedicineNational Hospital Organization Fukuoka HospitalFukuokaJapan
| | - K. Takahashi
- Department of Respiratory Diseases and Chest SurgeryOtsu Red Cross HospitalOtsuJapan
| | - K. Tomii
- Department of Respiratory MedicineKobe City Medical Center General HospitalKobeJapan
| | - M. Nishikawa
- Department of Respiratory MedicineFujisawa City HospitalFujisawaJapan
| | - N. Kaneko
- Department of Pulmonary MedicineKameda Medical CenterKamogawaJapan
| | - Y. Sugino
- Department of Respiratory MedicineToyota Memorial HospitalToyotaJapan
| | - M. Shinkai
- Respiratory Disease CenterYokohama City University Medical CenterYokohamaJapan
| | - T. Ueda
- The Department of Respiratory MedicineSaiseikai Nakatsu HospitalOsakaJapan
| | - Y. Tanikawa
- Department of Respiratory Medicine and Clinical ImmunologyToyota Kosei HospitalToyotaJapan
| | - T. Shirai
- Department of Respiratory MedicineShizuoka General HospitalShizuokaJapan
| | - M. Hirabayashi
- Department of Respiratory DiseasesAmagasaki General Medical CenterAmagasakiJapan
| | - T. Aoki
- Department of Internal Medicine, Respiratory DivisionTokai University School of MedicineIseharaJapan
| | - T. Kato
- Department of Respiratory Medicine and AllergologyKariya Toyota General HospitalKariyaJapan
| | - K. Iizuka
- Internal MedicinePublic Tomioka General HospitalTomiokaJapan
| | - M. Fujii
- Formerly at the Department of Respiratory Medicine and AllergologySapporo Medical University School of MedicineSapporoJapan
| | - M. Taniguchi
- Clinical Research Center for Allergology and RheumatologySagamihara National HospitalSagamiharaJapan
| |
Collapse
|
13
|
Maruse Y, Kawano S, Jinno T, Matsubara R, Goto Y, Kaneko N, Sakamoto T, Hashiguchi Y, Moriyama M, Toyoshima T, Kitamura R, Tanaka H, Oobu K, Kiyoshima T, Nakamura S. Significant association of increased PD-L1 and PD-1 expression with nodal metastasis and a poor prognosis in oral squamous cell carcinoma. Int J Oral Maxillofac Surg 2018; 47:836-845. [PMID: 29395669 DOI: 10.1016/j.ijom.2018.01.004] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/04/2017] [Accepted: 01/03/2018] [Indexed: 11/16/2022]
Abstract
Programmed cell death ligand 1 (PD-L1) and its receptor PD-1 are immune checkpoint molecules that attenuate the immune response. Blockade of PD-L1 enhances the immune response in a variety of tumours and thus serves as an effective anti-cancer treatment. However, the biological and prognostic roles of PD-L1/PD-1 signalling in oral squamous cell carcinoma (OSCC) remain to be elucidated. The purpose of this study was to examine the correlation of PD-L1/PD-1 signalling with the prognosis of OSCC patients to assess its potential therapeutic relevance. The expression of PD-L1 and of PD-1 was determined immunohistochemically in 97 patients with OSCC and the association of this expression with clinicopathological characteristics was examined. Increased expression of PD-L1 was found in 64.9% of OSCC cases and increased expression of PD-1 was found in 61.9%. Univariate and multivariate analysis revealed that increased expression of PD-L1 and PD-1 positively correlated with cervical lymph node metastasis. The expression of CD25, an activated T-cell marker, was negatively correlated with the labelling index of PD-L1 and PD-1. Moreover, the patient group with PD-L1-positive and PD-1-positive expression showed a more unfavourable prognosis than the group with PD-L1-negative and PD-1-negative expression. These data suggest that increased PD-L1 and PD-1 expression is predictive of nodal metastasis and a poor prognosis and is possibly involved in cancer progression via attenuating the immune response.
Collapse
Affiliation(s)
- Y Maruse
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - S Kawano
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
| | - T Jinno
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - R Matsubara
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Y Goto
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - N Kaneko
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Sakamoto
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Y Hashiguchi
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - M Moriyama
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Toyoshima
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - R Kitamura
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - H Tanaka
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - K Oobu
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Kiyoshima
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - S Nakamura
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| |
Collapse
|
14
|
Ohno T, Kaneko N, Matsuo S, Azuma T, Kamohara Y, Inoue S, Fujii M, Miyoshi T, Hayashi T, Yamanouchi K, Eguchi S. Can skin compression with prophylactic drugs for CIPN lead to better anticancer effects? Ann Oncol 2016. [DOI: 10.1093/annonc/mdw523.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
15
|
Sekiya K, Nakatani E, Fukutomi Y, Kaneda H, Iikura M, Yoshida M, Takahashi K, Tomii K, Nishikawa M, Kaneko N, Sugino Y, Shinkai M, Ueda T, Tanikawa Y, Shirai T, Hirabayashi M, Aoki T, Kato T, Iizuka K, Homma S, Taniguchi M, Tanaka H. Severe or life-threatening asthma exacerbation: patient heterogeneity identified by cluster analysis. Clin Exp Allergy 2016; 46:1043-55. [PMID: 27041475 DOI: 10.1111/cea.12738] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 03/19/2016] [Accepted: 03/19/2016] [Indexed: 01/01/2023]
Abstract
BACKGROUND Severe or life-threatening asthma exacerbation is one of the worst outcomes of asthma because of the risk of death. To date, few studies have explored the potential heterogeneity of this condition. OBJECTIVES To examine the clinical characteristics and heterogeneity of patients with severe or life-threatening asthma exacerbation. METHODS This was a multicentre, prospective study of patients with severe or life-threatening asthma exacerbation and pulse oxygen saturation < 90% who were admitted to 17 institutions across Japan. Cluster analysis was performed using variables from patient- and physician-orientated structured questionnaires. RESULTS Analysis of data from 175 patients with severe or life-threatening asthma exacerbation revealed five distinct clusters. Cluster 1 (n = 27) was younger-onset asthma with severe symptoms at baseline, including limitation of activities, a higher frequency of treatment with oral corticosteroids and short-acting beta-agonists, and a higher frequency of asthma hospitalizations in the past year. Cluster 2 (n = 35) was predominantly composed of elderly females, with the highest frequency of comorbid, chronic hyperplastic rhinosinusitis/nasal polyposis, and a long disease duration. Cluster 3 (n = 40) was allergic asthma without inhaled corticosteroid use at baseline. Patients in this cluster had a higher frequency of atopy, including allergic rhinitis and furred pet hypersensitivity, and a better prognosis during hospitalization compared with the other clusters. Cluster 4 (n = 34) was characterized by elderly males with concomitant chronic obstructive pulmonary disease (COPD). Although cluster 5 (n = 39) had very mild symptoms at baseline according to the patient questionnaires, 41% had previously been hospitalized for asthma. CONCLUSIONS & CLINICAL RELEVANCE This study demonstrated that significant heterogeneity exists among patients with severe or life-threatening asthma exacerbation. Differences were observed in the severity of asthma symptoms and use of inhaled corticosteroids at baseline, and the presence of comorbid COPD. These findings may contribute to a deeper understanding and better management of this patient population.
Collapse
Affiliation(s)
- K Sekiya
- Clinical Research Center for Allergology and Rheumatology, Sagamihara National Hospital, Sagamihara, Japan.,Department of Respiratory Medicine, Toho University Omori Medical Center, Tokyo, Japan
| | - E Nakatani
- Translational Research Informatics Center, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - Y Fukutomi
- Clinical Research Center for Allergology and Rheumatology, Sagamihara National Hospital, Sagamihara, Japan
| | - H Kaneda
- Translational Research Informatics Center, Foundation for Biomedical Research and Innovation, Kobe, Japan
| | - M Iikura
- Department of Respiratory Medicine, National Center for Global Health and Medicine, Tokyo, Japan
| | - M Yoshida
- Department of Internal Medicine, National Hospital Organization Fukuoka Hospital, Fukuoka, Japan
| | - K Takahashi
- Department of Respiratory Diseases and Chest Surgery, Otsu Red Cross Hospital, Otsu, Japan
| | - K Tomii
- Department of Respiratory Medicine, Kobe City Medical Center General Hospital, Kobe, Japan
| | - M Nishikawa
- Department of Respiratory Medicine, Fujisawa City Hospital, Fujisawa, Japan
| | - N Kaneko
- Department of Pulmonary Medicine, Kameda Medical Center, Kamogawa, Japan
| | - Y Sugino
- Department of Respiratory Medicine, Toyota Memorial Hospital, Toyota, Japan
| | - M Shinkai
- Respiratory Disease Center, Yokohama City University Medical Center, Yokohama, Japan
| | - T Ueda
- The Department of Respiratory Medicine, Saiseikai Nakatsu Hospital, Osaka, Japan
| | - Y Tanikawa
- Department of Respiratory Medicine and Clinical Immunology, Toyota Kosei Hospital, Toyota, Japan
| | - T Shirai
- Department of Respiratory Medicine, Shizuoka General Hospital, Shizuoka, Japan
| | - M Hirabayashi
- Department of Respiratory Diseases, Hyogo Prefectural Amagasaki Hospital, Amagasaki, Japan
| | - T Aoki
- Department of Internal Medicine, Respiratory Division, Tokai University School of Medicine, Isehara, Japan
| | - T Kato
- Department of Respiratory Medicine and Allergology, Kariya Toyota General Hospital, Kariya, Japan
| | - K Iizuka
- Internal Medicine, Public Tomioka General Hospital, Tomioka, Japan
| | - S Homma
- Department of Respiratory Medicine, Toho University Omori Medical Center, Tokyo, Japan
| | - M Taniguchi
- Clinical Research Center for Allergology and Rheumatology, Sagamihara National Hospital, Sagamihara, Japan
| | - H Tanaka
- NPO Sapporo Cough Asthma and Allergy Center, Sapporo, Japan
| |
Collapse
|
16
|
Matsunaga N, Kaneko N, Staub AY, Nakanishi T, Nunoya KI, Imawaka H, Tamai I. Analysis of the Metabolic Pathway of Bosentan and of the Cytotoxicity of Bosentan Metabolites Based on a Quantitative Modeling of Metabolism and Transport in Sandwich-Cultured Human Hepatocytes. ACTA ACUST UNITED AC 2015; 44:16-27. [PMID: 26502773 DOI: 10.1124/dmd.115.067074] [Citation(s) in RCA: 12] [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] [Received: 09/03/2015] [Accepted: 10/23/2015] [Indexed: 11/22/2022]
Abstract
To quantitatively understand the events in the human liver, we modeled a hepatic disposition of bosentan and its three known metabolites (Ro 48-5033, Ro 47-8634, and Ro 64-1056) in sandwich-cultured human hepatocytes based on the known metabolic pathway. In addition, the hepatotoxicity of Ro 47-8634 and Ro 64-1056 was investigated because bosentan is well known as a hepatotoxic drug. A model illustrating the hepatic disposition of bosentan and its three metabolites suggested the presence of a novel metabolic pathway(s) from the three metabolites. By performing in vitro metabolism studies on human liver microsomes, a novel metabolite (M4) was identified in Ro 47-8634 metabolism, and its structure was determined. Moreover, by incorporating the metabolic pathway of Ro 47-8634 to M4 into the model, the hepatic disposition of bosentan and its three metabolites was successfully estimated. In hepatocyte toxicity studies, the cell viability of human hepatocytes decreased after exposure to Ro 47-8634, and the observed hepatotoxicity was diminished by pretreatment with tienilic acid (CYP2C9-specific inactivator). Pretreatment with 1-aminobenzotriazole (broad cytochrome P450 inactivator) also tended to maintain the cell viability. Furthermore, Ro 64-1056 showed hepatotoxicity in a concentration-dependent manner. These results suggest that Ro 64-1056 is directly involved in bosentan-induced liver injury partly because CYP2C9 specifically mediates hydroxylation of the t-butyl group of Ro 47-8634. Our findings demonstrate the usefulness of a quantitative modeling of hepatic disposition of drugs and metabolites in sandwich-cultured hepatocytes. In addition, the newly identified metabolic pathway may be an alternative route that can avoid Ro 64-1056-induced liver injury.
Collapse
Affiliation(s)
- Norikazu Matsunaga
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| | - Naomi Kaneko
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| | - Angelina Yukiko Staub
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| | - Takeo Nakanishi
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| | - Ken-ichi Nunoya
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| | - Haruo Imawaka
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| | - Ikumi Tamai
- Department of Membrane Transport and Biopharmaceutics, Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan (N.M., A.Y.S., T.N., I.T.); and Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Tsukuba, Japan (N.M., N.K., K.N., H.I.)
| |
Collapse
|
17
|
Ando A, Imaeda N, Ohshima S, Miyamoto A, Kaneko N, Takasu M, Shiina T, Kulski JK, Inoko H, Kitagawa H. Characterization of swine leukocyte antigen alleles and haplotypes on a novel miniature pig line, Microminipig. Anim Genet 2014; 45:791-8. [DOI: 10.1111/age.12199] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/18/2014] [Indexed: 11/29/2022]
Affiliation(s)
- A. Ando
- Department of Molecular Life Science; Division of Basic Medical Science and Molecular Medicine; Tokai University School of Medicine; Isehara 259-1193 Japan
| | - N. Imaeda
- Department of Veterinary Medicine; Faculty of Applied Biological Sciences; Gifu University; Gifu 501-1193 Japan
| | - S. Ohshima
- Department of Molecular Life Science; Division of Basic Medical Science and Molecular Medicine; Tokai University School of Medicine; Isehara 259-1193 Japan
| | - A. Miyamoto
- Department of Molecular Life Science; Division of Basic Medical Science and Molecular Medicine; Tokai University School of Medicine; Isehara 259-1193 Japan
| | - N. Kaneko
- Fuji Micra Inc.; Fujinomiya 418-0005 Japan
| | - M. Takasu
- Department of Veterinary Medicine; Faculty of Applied Biological Sciences; Gifu University; Gifu 501-1193 Japan
| | - T. Shiina
- Department of Molecular Life Science; Division of Basic Medical Science and Molecular Medicine; Tokai University School of Medicine; Isehara 259-1193 Japan
| | - J. K. Kulski
- Department of Molecular Life Science; Division of Basic Medical Science and Molecular Medicine; Tokai University School of Medicine; Isehara 259-1193 Japan
- Centre for Forensic Science; The University of Western Australia; Nedlands WA 6008 Australia
| | - H. Inoko
- Department of Molecular Life Science; Division of Basic Medical Science and Molecular Medicine; Tokai University School of Medicine; Isehara 259-1193 Japan
| | - H. Kitagawa
- Department of Veterinary Medicine; Faculty of Applied Biological Sciences; Gifu University; Gifu 501-1193 Japan
| |
Collapse
|
18
|
Yokoo T, Ohoyama K, Itoh S, Suzuki J, Nanbu M, Kaneko N, Iwasa K, Sato TJ, Kimura H, Ohkawara M. Construction of Polarized Inelastic Neutron Spectrometer in J-PARC. ACTA ACUST UNITED AC 2014. [DOI: 10.1088/1742-6596/502/1/012046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
19
|
Asai N, Ohkuni Y, Matsuda M, Kaneko N. Small-cell lung cancer with epidermal growth factor receptor mutation: Case report and review of literature. Indian J Cancer 2014; 51:384-385. [PMID: 25494153 DOI: 10.4103/0019-509x.146753] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- N Asai
- Department of Pulmonology, Kameda Medical Center, Chiba, Japan
| | | | | | | |
Collapse
|
20
|
Konagai S, Mori M, Shimada I, Kondoh Y, Shindou N, Soga T, Furutani T, Sakagami H, Ueno Y, Kaneko N, Tanaka R, Fushiki H, Saito R, Kuromitsu S. ASP3026, a Selective ALK Inhibitor, Induces Tumor Regression against Crizotinib Resistant EML4-ALK-Dependent Tumor Models in Mice. Ann Oncol 2012. [DOI: 10.1016/s0923-7534(20)32265-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
|
21
|
Iwasaki M, Taylor GW, Manz MC, Kaneko N, Imai S, Yoshihara A, Miyazaki H. Serum antibody to Porphyromonas gingivalis in chronic kidney disease. J Dent Res 2012; 91:828-33. [PMID: 22828790 DOI: 10.1177/0022034512455063] [Citation(s) in RCA: 15] [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: 11/15/2022] Open
Abstract
Potentially significant associations between periodontal disease and chronic kidney disease (CKD) have been reported in recent studies. The aim of this cross-sectional study was to investigate the association between serum antibody to the periodontal pathogen Porphyromonas gingivalis (P. gingivalis) and CKD in 215 Japanese individuals, aged 79 yrs. Serum antibody levels to P. gingivalis were measured by enzyme-linked immunosorbent assay. An elevated serum antibody response was defined as the upper quartile and was compared with the bottom three quartiles. Participants were classified as having CKD when their glomerular filtration rate was between 15 and 59 mL/min/1.73 m(2). A multivariable logistic regression model was used to evaluate the association between elevated antibody status and the presence of CKD. Study participants with an elevated serum antibody to P. gingivalis were 2.6 times more likely to have CKD. The adjusted odds ratio of CKD for participants in the highest quartile of serum antibody to P. gingivalis was 2.59 (95% confidence interval, 1.05-6.34) when compared with others in lower quartiles after simultaneous adjustment for other covariates. In conclusion, the present study suggests that elevated serum antibody to P. gingivalis was significantly associated with decreased kidney function in a community-based cohort of elderly Japanese.
Collapse
Affiliation(s)
- M Iwasaki
- Division of Preventive Dentistry, Department of Oral Health Science, Niigata University Graduate School of Medical and Dental Sciences, Japan.
| | | | | | | | | | | | | |
Collapse
|
22
|
Asai N, Ohkuni Y, Matsunuma R, Nakashima K, Nakashita T, Otsuka Y, Kaneko N, Motojima S, Aoshima M. The predictive rule for the management of hospital-acquired pneumonia in adults by the Japanese Respiratory Society, I-ROAD, could correctly estimate the severity of Pneumcystis Pneumonia without human immunodeficiency virus infection. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
|
23
|
Kelly A, Elliott EB, Matsuda R, Kaneko N, Smith GL, Loughrey CM. The effect of K201 on isolated working rabbit heart mechanical function during pharmacologically induced Ca2+ overload. Br J Pharmacol 2012; 165:1068-83. [PMID: 21658026 DOI: 10.1111/j.1476-5381.2011.01531.x] [Citation(s) in RCA: 6] [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: 11/26/2022] Open
Abstract
BACKGROUND AND PURPOSE Reduced cardiac contractility has been associated with disrupted myocardial Ca(2+) signalling. The 1,4 benzothiazepine K201 (JTV-519) acts on several Ca(2+) handling proteins and improves cardiac contractility in vivo in a variety of animal models of myocardial dysfunction. However, it is unclear whether this improvement depends on the systemic effects of K201 or if K201 reverses the effects of Ca(2+) dysregulation, regardless of the cause. EXPERIMENTAL APPROACH The effect of K201 on cardiac mechanical function was assessed in isolated working hearts from adult rabbits, using a ventricular pressure-volume catheter. In separate experiments, the effect of K201 was investigated in hearts following pharmacologically induced Ca(2+) overload using elevated extracellular [Ca(2+) ] ([Ca(2+) ](o) ) and β-adrenoceptor stimulation. KEY RESULTS K201 induced a concentration-dependent decline in systolic function (peak pressure, dP/dt(max) and preload recruitable stroke work), lusitropy (reduced dP/dt(min) and increased end diastolic pressure) and stroke volume, independent of decreased heart rate. In separate experiments, mechanical function in hearts exposed to 4.5 mmol·L(-1) [Ca(2+) ](o) and 150 nmol·L(-1) isoprenaline declined until cessation of aortic flow (in 6 out of 11 hearts). However, all hearts perfused with the addition of 1 µmol·L(-1) K201 maintained aortic flow and demonstrated significantly improved peak systolic pressures, dP/dt(max) and dP/dt(min) . CONCLUSIONS AND IMPLICATIONS K201 significantly improved mechanical function of the heart during Ca(2+) overload. This suggests that K201 can limit the detrimental effects of elevated intracellular Ca(2+) and exert beneficial effects on cardiac contractile function, independent of systemic effects previously observed in vivo.
Collapse
Affiliation(s)
- A Kelly
- Institute of Cardiovascular & Medical Sciences, University of Glasgow, Glasgow, UK
| | | | | | | | | | | |
Collapse
|
24
|
Abstract
Tongue coating (TC) mainly consists of protein mostly from exfoliated epithelial cells. Until now, to reduce TC accumulation, only mechanical measures have been available, and the procedure involves unpleasant side effects, such as gagging reflex or carcinogenesis related to mechanical stimulation. We expected that protease might be effective in reducing the accumulation of TC causing oral malodor. The purpose of this study was to determine the effect of long-term use of candy tablets containing protease, actinidine, on both TC accumulation and concentration of volatile sulfur compounds (VSCs) in mouth air. We employed 14 subjects aged 24 to 54 years old for this study, and conducted a double-blind randomized crossover trial. The subjects sucked the tablets containing actinidine three times a day until the sixth day after starting the study. The tablets without actinidine were utilized as a placebo. Measurements of VSC concentration and TC accumulation were carried out before and after chewing tablets on the first day, and also on the seventh day. The levels of VSC and TC significantly (p < 0.05) decreased after tablets were taken on the first day in both the test and placebo groups. There was a statistically significant decrease (p < 0.05) in VSC after seven days of use only in the test group. The results of the study suggest that the tablets containing actinidine had an accumulative effect in reducing VSC in mouth air with long-term use.
Collapse
Affiliation(s)
- K Nohno
- Division of Preventive Dentistry, Graduate School of Medical and Dental Sciences, Niigata University,Gakko-Cho, Cho-ku, Niigata City, Niigata, Japan.
| | | | | | | |
Collapse
|
25
|
Watanabe Y, Nunokawa A, Kaneko N, Shibuya M, Egawa J, Fukui N, Someya T. Letter to the Editor Case-control study and meta-analysis of Ser311Cys polymorphism in the DRD2 gene demonstrate lack of association with risk for schizophrenia in the Japanese population. Genet Mol Res 2012. [DOI: 10.4238/2012.april.27.13] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
26
|
Elliott EB, Hasumi H, Otani N, Matsuda T, Matsuda R, Kaneko N, Smith GL, Loughrey CM. K201 (JTV-519) alters the spatiotemporal properties of diastolic Ca(2+) release and the associated diastolic contraction during β-adrenergic stimulation in rat ventricular cardiomyocytes. Basic Res Cardiol 2011; 106:1009-22. [PMID: 21901290 PMCID: PMC3228956 DOI: 10.1007/s00395-011-0218-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 07/24/2011] [Accepted: 08/20/2011] [Indexed: 11/25/2022]
Abstract
K201 has previously been shown to reduce diastolic contractions in vivo during β-adrenergic stimulation and elevated extracellular calcium concentration ([Ca2+]o). The present study characterised the effect of K201 on electrically stimulated and spontaneous diastolic sarcoplasmic reticulum (SR)-mediated Ca2+ release and contractile events in isolated rat cardiomyocytes during β-adrenergic stimulation and elevated [Ca2+]o. Parallel experiments using confocal microscopy examined spontaneous diastolic Ca2+ release events at an enhanced spatiotemporal resolution. 1.0 μmol/L K201 in the presence of 150 nmol/L isoproterenol (ISO) and 4.75 mmol/L [Ca2+]o significantly decreased the amplitude of diastolic contractions to ~16% of control levels. The stimulated free Ca2+ transient amplitude was significantly reduced, but stimulated cell shortening was not significantly altered. When intracellular buffering was taken into account, K201 led to an increase in action potential-induced SR Ca2+ release. Myofilament sensitivity to Ca2+ was not changed by K201. Confocal microscopy revealed diastolic events composed of multiple Ca2+ waves (2–3) originating at various points along the cardiomyocyte length during each diastolic period. 1.0 μmol/L K201 significantly reduced the (a) frequency of diastolic events and (b) initiation points/diastolic interval in the remaining diastolic events to 61% and 71% of control levels respectively. 1.0 μmol/L K201 can reduce the probability of spontaneous diastolic Ca2+ release and their associated contractions which may limit the propensity for the contractile dysfunction observed in vivo.
Collapse
Affiliation(s)
- E. B. Elliott
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, University Place, Glasgow, G12 8TA UK
| | - H. Hasumi
- Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - N. Otani
- Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - T. Matsuda
- Department of Cardiovascular Medicine, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - R. Matsuda
- Department of Preventative Medical Sciences for the Heart, Dokkyo Medical University School of Medicine, 880 Kitakobayashi, Mibu, Tochigi Japan
| | - N. Kaneko
- Utsunomiya Memorial Hospital, Utsunomiya, Japan
| | - G. L. Smith
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, University Place, Glasgow, G12 8TA UK
| | - Christopher M. Loughrey
- Institute of Cardiovascular and Medical Sciences, BHF Glasgow Cardiovascular Research Centre, University of Glasgow, University Place, Glasgow, G12 8TA UK
| |
Collapse
|
27
|
Yokoo T, Kaneko N, Itoh S, Otomo T, Suzuya K, Suetsugu Y, Shirai M. Examination of gas desorption by B4C resin for use in neutron scattering experiment. Rev Sci Instrum 2011; 82:095109. [PMID: 21974621 DOI: 10.1063/1.3635538] [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: 05/31/2023]
Abstract
Gas desorption rates for several types of B(4)C resins were investigated using a throughput method. The investigation was particularly focused on determining the out gas composition, effects of dry air, grain size (density) effects on the gas desorption rates. It is found that water is the main component of out gas and that dry air can effectively reduce gas desorption.
Collapse
Affiliation(s)
- T Yokoo
- Institute of Materials Structure Science, KEK, Oho 1-1 Tsukuba, Ibaraki 305-0801, Japan.
| | | | | | | | | | | | | |
Collapse
|
28
|
Yanagawa Y, Kaneko N. A case of transdiaphragmatic intercostal hernia: the efficacy of using multidetector-row CT with multiplanar reformation. Emerg Med J 2010; 28:10. [PMID: 20798088 DOI: 10.1136/emj.2008.070920] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Y Yanagawa
- Department of Traumatology and Critical Care Medicine, National Defense Medical College Hospital, Tokorozawa, Saitama, Japan.
| | | |
Collapse
|
29
|
Kaneko N, Yamanaka K, Kita A, Nakata M, Koutoku H, Sasamata M. Antitumor activity of YM155, a novel survivin suppressant, in combination with docetaxel against malignant melanoma cells. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e13621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
30
|
Ochiai T, Nishimura K, Watanabe T, Kitajima M, Nakayama N, Mashiko S, Yamazaki R, Kaneko N, Futagawa S, Nagaoka I. Evaluation of the distinction between responder and non-responder in FOLFOX/FOLFIRI based on the alteration of serum iron level. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15110 Background: The alteration of serum-iron level during chemotherapy is already reported (Follezou, NEOPLASMA 1985). However, the correlation to prognosis has not been evaluated. The aim of this study was to evaluate the correlation between prognosis and serum-iron level in advanced / metastatic colorectal cancer (aCRC / mCRC) patients treated by FOLFOX / FOLFIRI. Methods: Serum-iron levels, hemoglobin, AST and ALT serum levels in immediately pre and post chemotherapy were analyzed in 58 aCRC / mCRC patients received FOLFOX-4 / FOLFIRI therapy between April 2005 and September 2008. 26 patients received FOLFOX-4 / FOLFIRI therapy as the final chemotherapy died by the time of analysis. These patients were categorized into the high increase group and the low increase group using 200% increase as cut-off value and the prognosis was compared. Results: Mean serum-iron levels in immediately pre and post chemotherapy were 71.7±29.0μg/dl and 186.8±83.2μg/dl, respectively, and significant increase after chemotherapy was observed (p<0.001). This increase was transient and returns to pre chemotherapy level by the start of next course. This alteration was always observed on the chemotherapy. The median survival times from the initiation of FOLFOX-4 / FOLFIRI therapy for the high increase group (n: 5) and the low increase group (n: 21) were 487 and 182 days, respectively, and was significantly better in the high increase group (p=0.004). The alterations of hemoglobin, AST and ALT serum levels in immediately pre and post chemotherapy were not observed. Conclusions: It is suggested that serum-iron increase is a biological response not attributed to leakage from erythrocyte and hepatocyte. Significantly better prognosis in high serum-iron group may suggest the usefulness of serum-iron level to distinguish responder and non-responder in FOLFOX-4/FOLFIRI therapy. No significant financial relationships to disclose.
Collapse
Affiliation(s)
- T. Ochiai
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - K. Nishimura
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - T. Watanabe
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - M. Kitajima
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - N. Nakayama
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - S. Mashiko
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - R. Yamazaki
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - N. Kaneko
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - S. Futagawa
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| | - I. Nagaoka
- Tobu Chiiki Hospital, Tokyo, Japan; Juntendo University School of Medicine, Tokyo, Japan
| |
Collapse
|
31
|
Abstract
PURPOSE To assess the neurological and walking status of 56 elderly patients after cervical myelopathy to determine whether the surgery was justified. METHODS Records of 23 men and 33 women aged 75 to 86 (mean, 79) years who underwent laminoplasty for cervical myelopathy were retrospectively reviewed. They had been followed up for a mean of 3.5 (range, 0.2-8.6) years. Walking status was assessed according to long-term care insurance criteria. In 45 patients with more than 2 years of follow-up, neurological status was evaluated according to the Japanese Orthopaedic Association (JOA) score. Neurological recovery rate was classified as excellent, good, fair, poor, and worse. RESULTS Postoperatively, of the 47 patients still living, 22 could walk independently, 22 required assistance outdoors, 2 were using a wheelchair, and one was bedridden. The mean JOA score was 9.7 preoperatively, 12.2 one year postoperatively, and 11.8 at final assessment (p<0.001). The mean neurological recovery rate was 29% at one-year follow-up and 24% at final assessment (p=0.06). CONCLUSION Although excellent results were not expected in elderly patients, surgery to maintain independent walking status was justified in most of our patients.
Collapse
Affiliation(s)
- M Ishii
- Department of Orthopaedic Surgery, Hoshigaoka Koseinenkin Hospital, Osaka, Japan.
| | | | | | | | | | | |
Collapse
|
32
|
Yamashita T, Ohneda K, Nagano M, Miyoshi C, Kaneko N, Miwa Y, Yamamoto M, Ohneda O, Fujii-Kuriyama Y. Hypoxia-inducible transcription factor-2alpha in endothelial cells regulates tumor neovascularization through activation of ephrin A1. J Biol Chem 2008; 283:18926-36. [PMID: 18434321 DOI: 10.1074/jbc.m709133200] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The hypoxia-inducible transcription factors (HIF)-1alpha and -2alpha mediate responses to hypoxia, such as tumor neovascularization. To determine the function of HIF-2alpha in vascular endothelial cells (ECs), we examined vascular formation in HIF-2alpha knockdown (kd/kd) mice transplanted with tumors. We observed that both the tumor size and the number of large vessels growing within transplanted melanomas were significantly reduced in kd/kd recipients compared with wild-type (WT) mice. In contrast, we observed a similar extent of vascular formation within fibrosarcomas transplanted from either kd/kd or WT mice into WT recipients. Thus, HIF-2alpha expression in host animal ECs, but not in the tumor cells, is crucial for tumor neovascularization. HIF-2alpha may function through ephrin A1 as the expression of ephrin A1 and related genes was markedly reduced in kd/kd ECs, and HIF-2alpha specifically bound a hypoxia-response element sequence in the ephrin A1 promoter. Treatment of WT ECs with an ephrin A1 inhibitor (ephrin A1-Fc) also impaired neovascularization. We conclude that in ECs, HIF-2alpha plays an essential role in vascular remodeling during tumor vascularization through activation of at least ephrin A1.
Collapse
Affiliation(s)
- Toshiharu Yamashita
- Department of Regenerative Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba 305-8575, Japan
| | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Sawaya K, Kaneko N, Fukushi K, Yaguchi J. Behaviors of physiologically active bacteria in water environment and chlorine disinfection. Water Sci Technol 2008; 58:1343-1348. [PMID: 18957745 DOI: 10.2166/wst.2008.445] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Direct microscopic methods using several fluorescent staining were applied to estimate the proportion of physiologically active bacteria in the water environment and evaluate the efficacy of disinfection with chlorine. 4',6-diamidino-2-phenylindole (DAPI) was used to determine total bacterial numbers, and 5-cyano-2,3-ditolyl tetrazolium chloride (CTC) was chosen for direct detection of respiring bacteria. BacLight kit was used to assess bacterial membrane integrity. Bacteria with growth potential were enumerated using the DVC method and microcolony technique. The total bacterial number in river was 8 x 10(6)-3 x 10(10) cells/mL, and colony forming units on R2A medium were 1 x 10(4)-4 x 10(5) cfu/mL. In the case of wastewater treatment plant, 1-10% of total bacterial cells could form colonies. Physiologically active bacteria in river and wastewater treatment plant determined by fluorescent staining were much higher than those obtained by plate counting. The effect of chlorine on the physiological viability of Escherichia coli was also investigated. Microscopic viable bacteria were even more chlorine resistant than culturable bacteria. The inactivation rate coefficients of direct viable bacteria were one-second to third those of culturable bacteria.
Collapse
Affiliation(s)
- K Sawaya
- Advanced Course of Civil and Environmental Engineering, Hachinohe National College of Technology, 16-1 Uwanotai, Tamonoki, Hachinohe 039-1192, Japan
| | | | | | | |
Collapse
|
34
|
Aono H, Ohwada T, Kaneko N, Fuji T, Iwasaki M. The post-operative changes in the level of inflammatory markers after posterior lumbar interbody fusion. ACTA ACUST UNITED AC 2007; 89:1478-81. [DOI: 10.1302/0301-620x.89b11.19478] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [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]
Abstract
Inflammatory markers such as the C-reactive protein (CRP), white blood cell count and body temperature are easy to measure and are used as indicators of infection. The way in which they change in the early post-operative period after instrumented spinal surgery has not been reported in any depth. We measured these markers pre-operatively and at one, four, seven and 14 days postoperatively in 143 patients who had undergone an instrumented posterior lumbar interbody fusion. The CRP proved to be the only sensitive marker and had returned to its normal level in 48% of patients after 14 days. The CRP on day 7 was never higher than that on day 4. Age, gender, body temperature, operating time and blood loss were not related to the CRP level. A high CRP does not in itself suggest infection, but any increase after four days may presage infection.
Collapse
Affiliation(s)
- H. Aono
- Department of Orthopaedic Surgery, Osaka National Hospital, 2-1-14, Hoenzaka Chuo-ku, Osaka City, Osaka 540-0006, Japan
| | - T. Ohwada
- Department of Orthopaedic Surgery, Kansai Rosai Hospital, 3-1-69, Inabaso Amagasaki City, Hyogo, 660-8511, Japan
| | - N. Kaneko
- Department of Orthopaedic Surgery, Osaka Koseinenkin Hospital, 4-2-78 Fukushima, Fukushima-ku, Osaka City, Osaka 553-0003, Japan
| | - T. Fuji
- Department of Orthopaedic Surgery, Osaka Koseinenkin Hospital, 4-2-78 Fukushima, Fukushima-ku, Osaka City, Osaka 553-0003, Japan
| | - M. Iwasaki
- Department of Orthopaedic Surgery, Osaka University Graduate, School of Medicine, 2-15 Yamadaoka Suita City, Osaka 565-0871, Japan
| |
Collapse
|
35
|
Loughrey CM, Otani N, Seidler T, Craig MA, Matsuda R, Kaneko N, Smith GL. K201 modulates excitation–contraction coupling and spontaneous Ca2+ release in normal adult rabbit ventricular cardiomyocytes. Cardiovasc Res 2007; 76:236-46. [PMID: 17644079 DOI: 10.1016/j.cardiores.2007.06.014] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2007] [Revised: 06/15/2007] [Accepted: 06/18/2007] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVES The drug K201 (JTV-519) increases inotropy and suppresses arrhythmias in failing hearts, but the effects of K201 on normal hearts is unknown. METHODS The effect of K201 on excitation-contraction (E-C) coupling in normal myocardium was studied by using voltage-clamp and intracellular Ca(2+) measurements in intact cells. Sarcoplasmic reticulum (SR) function was assessed using permeabilised cardiomyocytes. RESULTS Acute application of <1 micromol/L K201 had no significant effect on E-C coupling. K201 at 1 micromol/L decreased Ca(2+) transient amplitude (to 83+/-7%) without affecting I(Ca,L) or the SR Ca(2+) content. At 3 micromol/L K201 caused a larger reduction of Ca(2+) transient amplitude (to 60+/-7%) with accompanying reductions in I(Ca,L) amplitude (to 66+/-8%) and SR Ca(2+) content (74+/-9%). Spontaneous SR Ca(2+) release during diastole was induced by increasing intracellular [Ca(2+)]. At 1 micromol/L K201 reduced the frequency of spontaneous Ca(2+) release. The effect of K201 on SR-mediated Ca(2+) waves and Ca(2+) sparks was examined in beta-escin-permeabilised cardiomyocytes by confocal microscopy. K201 (1 micromol/L) reduced the frequency and velocity of SR Ca(2+) waves despite no change in SR Ca(2+) content. At 3 micromol/L K201 completely abolished Ca(2+) waves and reduced the SR Ca(2+) content (to approximately 73%). K201 at 1 micromol/L reduced Ca(2+) spark amplitude and frequency. Assays specific to SR Ca(2+)-ATPase and RyR2 activity indicated that K201 inhibited both SR Ca(2+) uptake and release. CONCLUSIONS K201 modifies E-C coupling in normal cardiomyocytes. A dual inhibitory action on SERCA and RyR2 explains the ability of K201 to suppress spontaneous diastolic Ca(2+) release during Ca(2+) overload without significantly affecting Ca(2+) transient amplitude.
Collapse
Affiliation(s)
- C M Loughrey
- Institute of Comparative Medicine, Faculty of Veterinary Medicine, University of Glasgow, UK
| | | | | | | | | | | | | |
Collapse
|
36
|
Xie BP, Yang K, Shen DW, Zhao JF, Ou HW, Wei J, Gu SY, Arita M, Qiao S, Namatame H, Taniguchi M, Kaneko N, Eisaki H, Tsuei KD, Cheng CM, Vobornik I, Fujii J, Rossi G, Yang ZQ, Feng DL. High-energy scale revival and giant kink in the dispersion of a cuprate superconductor. Phys Rev Lett 2007; 98:147001. [PMID: 17501304 DOI: 10.1103/physrevlett.98.147001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2006] [Indexed: 05/15/2023]
Abstract
In the present photoemission study of a cuprate superconductor Bi1.74Pb0.38Sr1.88CuO6+delta, we discovered a large scale dispersion of the lowest band, which unexpectedly follows the band structure calculation very well. Similar behavior observed in blue bronze and the Mott insulator Ca2CuO2Cl2 suggests that the origin of hopping-dominated dispersion in an overdoped cuprate might be quite complicated. A giant kink in the dispersion is observed, and the complete self-energy containing all interaction information is extracted for a doped cuprate. These results recovered significant missing pieces in our current understanding of the electronic structure of cuprates.
Collapse
Affiliation(s)
- B P Xie
- Department of Physics, Applied Surface Physics State Key Laboratory, and Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
37
|
Fang AC, Capriotti L, Scalapino DJ, Kivelson SA, Kaneko N, Greven M, Kapitulnik A. Gap-inhomogeneity-induced electronic states in superconducting Bi2Sr2CaCu2O(8+delta). Phys Rev Lett 2006; 96:017007. [PMID: 16486504 DOI: 10.1103/physrevlett.96.017007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2005] [Indexed: 05/06/2023]
Abstract
In this Letter, we analyze, using scanning tunneling spectroscopy, the density of electronic states in nearly optimally doped Bi2Sr2CaCu2O(8+delta) in zero magnetic field. Focusing on the superconducting gap, we find patches of what appear to be two different phases in a background of some average gap, one with a relatively small gap and sharp large coherence peaks and one characterized by a large gap with broad weak coherence peaks. We compare these spectra with calculations of the local density of states for a simple phenomenological model in which a 2xi0 x 2xi0 patch with an enhanced or suppressed d-wave gap amplitude is embedded in a region with a uniform average d-wave gap.
Collapse
Affiliation(s)
- A C Fang
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
| | | | | | | | | | | | | |
Collapse
|
38
|
Kaneko N, Okuda M, Toyama N, Oikawa T, Watanabe M, Kanaya N, Yazawa M, Hasegawa K, Morimoto M, Hayashi T, Une S, Nakaichi M, Taura Y, Tsujimoto H, Inokuma H. Detection of centrosome amplification as a surrogate marker of dysfunction in the p53 pathway -p53 gene mutation or MDM2 overexpression. Vet Comp Oncol 2005; 3:203-10. [DOI: 10.1111/j.1476-5810.2005.00080.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
39
|
Lu L, Chabot-Couture G, Zhao X, Hancock JN, Kaneko N, Vajk OP, Yu G, Grenier S, Kim YJ, Casa D, Gog T, Greven M. Charge-transfer excitations in the model superconductor HgBa(2)CuO(4+delta). Phys Rev Lett 2005; 95:217003. [PMID: 16384172 DOI: 10.1103/physrevlett.95.217003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Indexed: 05/05/2023]
Abstract
We report a Cu -edge resonant inelastic x-ray scattering (RIXS) study of charge-transfer excitations in the 2-8 eV range in the structurally simple compound HgBa(2)CuO(4+delta) at optimal doping (T(c)=96.5 K). The spectra exhibit a significant dependence on the incident photon energy which we carefully utilize to resolve a multiplet of weakly dispersive (<0.5 eV) electron-hole excitations, including a mode at 2 eV. The observation of this 2 eV excitation suggests the existence of a remnant charge-transfer gap deep in the superconducting phase. Quite generally, our results, which include additional data for the Mott insulator La(2)CuO(4), demonstrate the importance of exploring the incident photon-energy dependence of the RIXS cross section.
Collapse
Affiliation(s)
- L Lu
- Department of Applied Physics, Stanford University, Stanford, California 94305, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Savici AT, Fukaya A, Gat-Malureanu IM, Ito T, Russo PL, Uemura YJ, Wiebe CR, Kyriakou PP, MacDougall GJ, Rovers MT, Luke GM, Kojima KM, Goto M, Uchida S, Kadono R, Yamada K, Tajima S, Masui T, Eisaki H, Kaneko N, Greven M, Gu GD. Muon spin relaxation studies of magnetic-field-induced effects in high-Tc superconductors. Phys Rev Lett 2005; 95:157001. [PMID: 16241752 DOI: 10.1103/physrevlett.95.157001] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2004] [Revised: 03/30/2005] [Indexed: 05/05/2023]
Abstract
Muon spin relaxation measurements in high transverse magnetic fields [FORMULA: SEE TEXT] revealed strong field-induced quasistatic magnetism in the underdoped and Eu-doped (La,Sr)2CuO4 and La1.875Ba0.125CuO4, existing well above Tc and TN. The susceptibility counterpart of Cu spin polarization, derived from the muon spin relaxation rate, exhibits a divergent behavior towards T approximately 25 K. No field-induced magnetism was detected in overdoped La1.81Sr0.19CuO4, optimally doped Bi2212, and Zn-doped YBa2Cu3O7.
Collapse
Affiliation(s)
- A T Savici
- Department of Physics, Columbia University, New York, New York 10027, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Kanaya T, Kaneko N, Amaike C, Fukushima M, Morita S, Miyazaki H, Saito I. The effect of orthodontic appliances on levels of Streptococcus mutans, Streptococcus sobrinus and microbial flora in saliva. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/j.ics.2005.07.061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
42
|
Machida S, Sato C, Nishino S, Otani N, Amano H, Yoshida T, Hiroshi H, Nakamoto T, Sasagawa M, Kaneko N. P-261 Low-dose thin-section CT screening for lung cancer using a multi-slice CT scanner. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80755-x] [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]
|
43
|
Cuk T, Baumberger F, Lu DH, Ingle N, Zhou XJ, Eisaki H, Kaneko N, Hussain Z, Devereaux TP, Nagaosa N, Shen ZX. Coupling of the B1g phonon to the antinodal electronic states of Bi2Sr2Ca0.92Y0.08Cu2O8+delta. Phys Rev Lett 2004; 93:117003. [PMID: 15447370 DOI: 10.1103/physrevlett.93.117003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2004] [Indexed: 05/24/2023]
Abstract
Angle-resolved photoemission spectroscopy on optimally doped Bi(2)Sr(2)Ca(0.92)Y(0.08)Cu(2)O(8+delta) uncovers a coupling of the electronic bands to a 40 meV mode in an extended k-space region away from the nodal direction, leading to a new interpretation of the strong renormalization of the electronic structure seen in Bi2212. Phenomenological agreements with neutron and Raman experiments suggest that this mode is the B(1g) oxygen bond-buckling phonon. A theoretical calculation based on this assignment reproduces the electronic renormalization seen in the data.
Collapse
Affiliation(s)
- T Cuk
- Departments of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Homes CC, Dordevic SV, Strongin M, Bonn DA, Liang R, Hardy WN, Komiya S, Ando Y, Yu G, Kaneko N, Zhao X, Greven M, Basov DN, Timusk T. A universal scaling relation in high-temperature superconductors. Nature 2004; 430:539-41. [PMID: 15282599 DOI: 10.1038/nature02673] [Citation(s) in RCA: 209] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2004] [Accepted: 05/17/2004] [Indexed: 11/09/2022]
Abstract
Since the discovery of superconductivity at elevated temperatures in the copper oxide materials there has been a considerable effort to find universal trends and correlations amongst physical quantities, as a clue to the origin of the superconductivity. One of the earliest patterns that emerged was the linear scaling of the superfluid density (rho(s)) with the superconducting transition temperature (T(c)), which marks the onset of phase coherence. This is referred to as the Uemura relation, and it works reasonably well for the underdoped materials. It does not, however, describe optimally doped (where T(c) is a maximum) or overdoped materials. Similarly, an attempt to scale the superfluid density with the d.c. conductivity (sigma(dc)) was only partially successful. Here we report a simple scaling relation (rho(s) proportional, variant sigma(dc)T(c), with sigma(dc) measured at approximately T(c)) that holds for all tested high-T(c) materials. It holds regardless of doping level, nature of dopant (electrons versus holes), crystal structure and type of disorder, and direction (parallel or perpendicular to the copper-oxygen planes).
Collapse
Affiliation(s)
- C C Homes
- Department of Physics, Brookhaven National Laboratory, Upton, New York 11973, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Tadokoro R, Shimizu T, Hosaka A, Kaneko N, Satoh Y, Yamashiro Y. Postnatal and postprandial changes in plasma concentrations of glicentin in term and preterm infants. Acta Paediatr 2003; 92:1175-9. [PMID: 14632334 DOI: 10.1080/08035250310000514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/27/2023]
Abstract
AIM To examined the changes in basal plasma concentrations of glicentin in developing children and the postnatal and postprandial changes in plasma glicentin levels in infants. METHODS Glicentin, an active component of enteroglucagon, is considered to have a significant trophic action on the intestinal mucosa. Fasting plasma concentrations of glicentin in healthy children and in term and preterm infants were measured before and 30 min after feeding during the first 14 d of life. RESULTS Plasma basal concentrations of glicentin in children under 1 y of age were significantly higher than those in children aged 1 to 15 y. Plasma basal concentrations of glicentin at 5 or 6 d (2496 and 2190 pg/ml) and at 14 d (2987 and 2817 pg/ml) after birth were significantly higher than those at 1 or 2 d (1098 and 1240 pg/ml) after birth in normal birthweight (NBW) and low-birthweight (LBW) infants. There was no significant difference in the glicentin level between infants at 1 or 2 d (1864 pg/ml) and at 5 or 6 d (1910 pg/ml) after birth in very-low birthweight (VLBW) infants, but the levels at 14 d (3310 pg/ml) after birth were significantly higher than either of those levels. Plasma glicentin concentrations after feeding were significantly higher than those before feeding at 1 or 2 d and at 5 or 6 d after birth in NBW and LBW infants, but a significant increase in the plasma glicentin level after feeding was first observed at 14 d after birth in VLBW infants. There were no significant differences in the basal plasma (2401 and 2718 pg/ml) and postprandial (3007 and 3912 pg/ml) glicentin levels between breastfed and formula-fed infants. CONCLUSION The results of the study suggest that glicentin may play an important role in intestinal mucosal growth in the early period of life, although its role in VLBW infants should be further investigated.
Collapse
Affiliation(s)
- R Tadokoro
- Department of Paediatrics, Juntendo University School of Medicine, Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
46
|
Howald C, Eisaki H, Kaneko N, Kapitulnik A. Coexistence of periodic modulation of quasiparticle states and superconductivity in Bi2Sr2CaCu2O8+delta. Proc Natl Acad Sci U S A 2003; 100:9705-9. [PMID: 12913127 PMCID: PMC187829 DOI: 10.1073/pnas.1233768100] [Citation(s) in RCA: 92] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In this article we show, using scanning tunneling spectroscopy, the existence of static striped density of electronic states in nearly optimally doped Bi2Sr2CaCu2O8+delta in zero field. This modulation is aligned with the Cu-O bonds, with a periodicity of four lattice constants, and exhibits features characteristic of a two-dimensional system of line objects. We further show that the density of states modulation manifests itself as a shift of states from above to below the superconducting gap. The fact that a single energy scale (i.e., the gap) appears for both superconductivity and stripes suggests that these two effects have the same origin.
Collapse
Affiliation(s)
- C Howald
- Department of Physics, Stanford University, Stanford, CA 94305, USA
| | | | | | | |
Collapse
|
47
|
Noda N, Kaneko N, Mikami M, Kimochi Y, Tsuneda S, Hirata A, Mizuochi M, Inamori Y. Effects of SRT and DO on N2O reductase activity in an anoxic-oxic activated sludge system. Water Sci Technol 2003; 48:363-370. [PMID: 14753557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Nitrous oxide (N2O) is emitted from wastewater treatment processes, and is known to be a green house gas contributing to global warming. It is thus important to develop technology that can suppress N2O emission. The effects of sludge retention time (SRT) and dissolved oxygen (DO) on N2O emission in an anoxic-oxic activated sludge system were estimated. Moreover, the microbial community structure in the sludge, which plays an important role in N2O suppression, was clarified based on nitrous oxide reductase (nosZ) gene analysis by molecular biological techniques. The results showed that under low SRT conditions, nitrification efficiency was reduced and the N2O emission rate in the oxic reactors was increased. It was also observed that N2O emission was enhanced under low DO conditions, where the available oxygen is insufficient for nitrification. Moreover, molecular analysis revealed that the clones identified in this study were closely related to Ralstonia eutropha and Paracoccus denitrificans. The fact that the identified sequences are not closely related to known culturable denitrifier nosZ sequences indicates a substantial in situ diversity of denitrifiers contributing to N2O suppression, which are not reflected in the cultivatable fraction of the population. The further application of these new molecular techniques should serve to enhance our knowledge of the microbial community of denitrifying bacteria contributing to N2O suppression in wastewater treatment systems.
Collapse
Affiliation(s)
- N Noda
- National Institute of Advanced Industrial Science and Technology, Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8566, Japan.
| | | | | | | | | | | | | | | |
Collapse
|
48
|
Ikemoto M, Saito A, Kaneko N, Fuse C, Goto K, Oku N. 1P-0163 Isolation and characterization of RAGE binding peptides. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90237-6] [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: 10/25/2022]
|
49
|
Armitage NP, Ronning F, Lu DH, Kim C, Damascelli A, Shen KM, Feng DL, Eisaki H, Shen ZX, Mang PK, Kaneko N, Greven M, Onose Y, Taguchi Y, Tokura Y. Doping dependence of an n-type cuprate superconductor investigated by angle-resolved photoemission spectroscopy. Phys Rev Lett 2002; 88:257001. [PMID: 12097118 DOI: 10.1103/physrevlett.88.257001] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2001] [Indexed: 05/23/2023]
Abstract
We present an angle-resolved photoemission doping dependence study of the n-type cuprate superconductor Nd(2-x)Ce(x)CuO(4+/-delta), from the half-filled Mott insulator to the T(c) = 24 K superconductor. In Nd2CuO4, we reveal the charge-transfer band for the first time. As electrons are doped into the system, this feature's intensity decreases with the concomitant formation of near- E(F) spectral weight. At low doping, the Fermi surface is an electron-pocket (with volume approximately x) centered at (pi,0). Further doping leads to the creation of a new holelike Fermi surface (volume approximately 1+x) centered at (pi,pi). These findings shed light on the Mott gap, its doping evolution, as well as the anomalous transport properties of the n-type cuprates.
Collapse
Affiliation(s)
- N P Armitage
- Department of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
50
|
Feng DL, Damascelli A, Shen KM, Motoyama N, Lu DH, Eisaki H, Shimizu K, Shimoyama Ji JI, Kishio K, Kaneko N, Greven M, Gu GD, Zhou XJ, Kim C, Ronning F, Armitage NP, Shen ZX. Electronic structure of the trilayer cuprate superconductor Bi(2)Sr(2)Ca(2)Cu(3)O(10+delta). Phys Rev Lett 2002; 88:107001. [PMID: 11909381 DOI: 10.1103/physrevlett.88.107001] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2001] [Indexed: 05/23/2023]
Abstract
The low-energy electronic structure of the nearly optimally doped trilayer cuprate superconductor Bi(2)Sr(2)Ca(2)Cu(3)O(10+delta) is investigated by angle-resolved photoemission spectroscopy. The normal state quasiparticle dispersion and Fermi surface and the superconducting d-wave gap and coherence peak are observed and compared with those of single- and bilayer systems. We find that both the superconducting gap magnitude and the relative coherence-peak intensity scale linearly with T(c) for various optimally doped materials.
Collapse
Affiliation(s)
- D L Feng
- Department of Physics, Applied Physics, and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, California 94305, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|