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Nakano H, Hashimoto H, Naraba H, Mochizuki M, Takahashi Y, Sonoo T, Nakamura K. Efficacy of intensive goal-directed rehabilitation with electric muscle stimulation and nutrition (i-green) protocol in intensive care unit. Clin Nutr ESPEN 2021. [DOI: 10.1016/j.clnesp.2021.09.069] [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: 10/19/2022]
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Harigai M, Sugitani N, Sakai R, Inoue E, Mochizuki M, Toyoizumi S, Yoshii N, Sugiyama N, Tanaka E, Yamanaka H. OP0187 INCIDENCE OF MALIGNANCY IN JAPANESE PATIENTS WITH RHEUMATOID ARTHRITIS: DATA FROM THE JAPANESE IORRA PATIENT REGISTRY. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.356] [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: 11/03/2022]
Abstract
Background:The risk of some types of malignancy is increased in patients (pts) with rheumatoid arthritis (RA), compared with the general population. We have previously reported the incidence of malignancy in Japanese pts with RA.1-4Objectives:This analysis further evaluated the incidence of malignancy in Japanese pts with RA using recent data from the large prospective observational study, IORRA.Methods:This analysis included all pts with RA aged ≥18 years who were enrolled in IORRA from April 2013 to October 2018, with follow-up through October 2019, and participated in ≥2 surveys. Index was defined as the date of the first entry in the IORRA database, with baseline defined as the 6-month period prior to the index date. Malignancies were identified in pt reports of biannual IORRA surveys and confirmed using medical records. Age- and sex-standardised incidence ratios (SIRs) and 95% confidence intervals (CIs) were calculated.Results:In total, 8020 pts were included. At baseline, the majority (85.0%) of pts were female; mean disease duration was 12.8 years, 5.8% and 4.8% of pts had a past history of malignancy or comorbid malignancy at baseline, respectively, and the majority (75.9%) of pts were receiving methotrexate (Table). The SIR (95% CI) was 0.90 (0.80, 1.01). SIRs (95% CI) of site-specific malignancies were: breast cancer, 0.91 (0.69, 1.18); lung cancer, 0.67 (0.44, 0.97); colon cancer, 0.93 (0.62, 1.32); stomach cancer, 0.82 (0.56, 1.14); and lymphoma, 3.74 (2.73, 4.96).Table 1.Patient demographics and baseline disease characteristicsPatients with RA (N=8020)Age (years), mean (SD)59.3 (13.8)Female, n (%)6816 (85.0)Duration of RA (years), mean (SD)12.8 (10.3)Never smoked, n (%)5086 (66.2)DAS28, mean (SD)2.8 (1.1)J-HAQ, mean (SD)0.60 (0.72)Malignancy status, n (%)Past history of malignancy467 (5.8)Comorbid malignancy at baseline386 (4.8)Medication use, n (%)MTX6088 (75.9)Tacrolimus787 (9.8)Corticosteroids2641 (32.9)bDMARD use1508 (18.8)TNFi1163 (14.5)Tocilizumab311 (3.9)Abatacept106 (1.3)JAK inhibitors4 (0.05)bDMARD, biological disease-modifying antirheumatic drug; DAS28, Disease Activity Score in 28 joints; JAK, Janus kinase; J-HAQ, Japanese Health Assessment Questionnaire; MTX, methotrexate; N, the number of patients included in the analysis, the number of patients assessed for each characteristic may be fewer than N; n, the number of patients with each characteristic; SD, standard deviation; TNFi, tumour necrosis factor inhibitorConclusion:Overall risk of malignancy was similar to that in the general Japanese population, although a significantly higher risk of lymphoma was identified.References:[1]Sugimoto et al. Rheumatol Int 2017; 37: 1871-1878.[2]Shimizu et al. Clin Rheumatol 2017; 36: 1237-1245.[3]Askling et al. Ann Rheum Dis 2016; 75: 1789-1796.[4]Yamada et al. Rheumatol Int 2011; 31: 1487-1492.Acknowledgements:Study sponsored by Pfizer Inc. Medical writing support was provided by Anthony G McCluskey, CMC Connect, and funded by Pfizer Inc.Disclosure of Interests:masayoshi harigai Speakers bureau: AbbVie Japan, Ayumi, Boehringer Ingelheim Japan, Bristol-Myers Squibb, Chugai, Eisai, Eli Lilly Japan, GlaxoSmithKline, Kissei, Pfizer Japan Inc, Takeda, Teijin, Consultant of: AbbVie Japan, Boehringer Ingelheim Japan, Bristol-Myers Squibb, Kissei, Teijin, Grant/research support from: AbbVie Japan, Asahi Kasei, Astellas, Ayumi, Bristol-Myers Squibb, Chugai, Daiichi-Sankyo, Eisai, Kissei, Mitsubishi Tanabe, Nippon Kayaku, Sekiui Medical, Shionogi, Taisho, Takeda, Teijin, Naohiro Sugitani: None declared, Ryoko Sakai Speakers bureau: Bristol-Myers Squibb, Eisuke Inoue Speakers bureau: Pfizer Japan Inc, Bristol-Myers Squibb, Michika MOCHIZUKI Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, Shigeyuki Toyoizumi Employee of: Pfizer R&D Japan, Noritoshi Yoshii Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, Naonobu Sugiyama Shareholder of: Pfizer Inc, Employee of: Pfizer Inc, Eiichi Tanaka Speakers bureau: AbbVie Japan, Asahi Kasei, Astellas, Ayumi, Chugai, Eisai, Eli Lilly Japan, GlaxoSmithKline, Kyowa, Janssen, Mochida, Pfizer Japan Inc, Takeda, Teijin, Hisashi Yamanaka Speakers bureau: Astellas, Bristol-Myers-Squibb, Pfizer Inc, Mitsubishi Tanabe, Teijin, YLBio, Consultant of: Corrona, LLC
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Isawa M, Kajiyama M, Tominaga Y, Nakada H, Aomori T, Mochizuki M. Review of clinical studies on the nocebo effect. Pharmazie 2020; 75:548-553. [PMID: 33239127 DOI: 10.1691/ph.2020.0642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Objective: To review clinical studies on the nocebo effect. PubMed was searched for relevant clinical studies as well as studies on the relationship between the nocebo effect and genes. Data sources: A total of 35 clinical studies on the nocebo effect and one study on its relationship with genes were selected for review. All were conducted outside Japan. Results and conclusion: An increasing number of clinical studies on the nocebo effect are being published. The 36 studies selected for review were grouped into the following five categories: (1) studies of how differences in participant characteristics such as personality affect susceptibility to the nocebo effect, (2) studies of how differences in provision of information about side effects affect susceptibility to the nocebo effect, (3) studies of how nocebo conditioning affects susceptibility to the nocebo effect, (4) studies of nocebo response mechanisms, and (5) studies of the nocebo effect and genetic polymorphisms. The first four categories comprised 5, 19, 8, and 3 studies, respectively, and the fifth comprised 1 study. Most of the studies investigated how differences in the provision of information affect susceptibility to the nocebo effect. Few studies investigated individual differences in the nocebo effect (differences between responders and non-responders) or mechanisms of the nocebo effect.
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Affiliation(s)
- M Isawa
- Division of Hospital Pharmacy Science, Faculty of Pharmacy, Keio University, Shibakoen, Tokyo, Japan;,
| | - M Kajiyama
- Division of Hospital Pharmacy Science, Faculty of Pharmacy, Keio University, Shibakoen, Tokyo, Japan
| | - Y Tominaga
- Division of Hospital Pharmacy Science, Faculty of Pharmacy, Keio University, Shibakoen, Tokyo, Japan
| | - H Nakada
- Division of Hospital Pharmacy Science, Faculty of Pharmacy, Keio University, Shibakoen, Tokyo, Japan
| | - T Aomori
- Division of Hospital Pharmacy Science, Faculty of Pharmacy, Keio University, Shibakoen, Tokyo, Japan
| | - M Mochizuki
- Division of Hospital Pharmacy Science, Faculty of Pharmacy, Keio University, Shibakoen, Tokyo, Japan
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Mochizuki M, Fukuchi T, Hatakeyama S, Sugawara H. Immune reconstitution inflammatory syndrome associated with granulomatous Pneumocystis pneumonia co-infected with Mycobacterium avium in an HIV-infected patient. J Infect Public Health 2020. [DOI: 10.1016/j.jiph.2020.01.113] [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] Open
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Okabe N, Fujiwara M, Mochizuki M, Ohtsuka K, Nishigaya Y, Kobayashi Y, Kamma H. CD34-positive uterine lipoleiomyoma in a postmenopausal woman with chronic glomerulonephritis. EUR J GYNAECOL ONCOL 2019. [DOI: 10.12892/ejgo4661.2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Kitazawa H, Aoki H, Ueda F, Morita T, Mochizuki M. Effective countermeasures for Salmonella contamination in actual oilmeal-manufacturing plant in India. J Appl Microbiol 2019; 127:1901-1906. [PMID: 31502742 DOI: 10.1111/jam.14438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Revised: 07/26/2019] [Accepted: 08/26/2019] [Indexed: 12/01/2022]
Abstract
AIMS Salmonella contamination in the manufacturing process of an overseas oilmeal plant was investigated and countermeasures for Salmonella contamination were evaluated. METHODS AND RESULTS Salmonella was detected from deposits and adhered materials inside the main processing equipment. Specifically high contamination was observed in the equipment associated with the meal cooler, with several Salmonella serovars being detected. A number of Salmonella serovars were also detected in the equipment of the fine powder recovery process. To prevent Salmonella contamination of oilmeal products, effective countermeasures that have been employed in Japan were implemented. By removing residues from the equipment and disinfecting the interior of the equipment, a significant decrease in the contamination rate of oilmeal products was achieved compared to before sanitation (P < 0·05). CONCLUSIONS Effective countermeasures to control Salmonella contamination in the overseas manufacturing process of oilmeal were established. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report focusing on Salmonella countermeasures in an actual oilmeal-manufacturing plant overseas.
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Affiliation(s)
- H Kitazawa
- Yokohama Isogo Plant, The Nisshin OilliO Group, Ltd., Isogo-ku, Yokohama, Japan.,Department of Applied Science, School of Veterinary Nursing, Nippon Veterinary and Life Science University, Musashino, Tokyo, Japan
| | - H Aoki
- Department of Basic Science, School of Veterinary Nursing, Nippon Veterinary and Life Science University, Musashino, Tokyo, Japan
| | - F Ueda
- Laboratory of Veterinary Public Health, School of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashino, Tokyo, Japan
| | - T Morita
- Settsu Oil Mill, Inc., Sakai, Osaka, Japan
| | - M Mochizuki
- Department of Applied Science, School of Veterinary Nursing, Nippon Veterinary and Life Science University, Musashino, Tokyo, Japan
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Tominaga Y, Aomori T, Hayakawa T, Morisky DE, Takahashi K, Mochizuki M. Relationship between medication adherence and glycemic control in Japanese patients with type 2 diabetes. Pharmazie 2019; 73:609-612. [PMID: 30223927 DOI: 10.1691/ph.2018.8587] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
A cross-sectional survey of 358 patients was conducted among type 2 diabetes patients recruited at medical institutions or via an online research company. Medication adherence was measured using the 8-item Morisky Medication Adherence Scale (MMAS-8). Univariate and multivariate regression analyses of glycosylated hemoglobin (HbA1c) were performed in addition to assessing demographic and disease characteristics and MMAS-8. In conclusion, medication adherence as measured by the MMAS-8 score independently contributes to altering the HbA1c level in the range of 1.12 %. The number of medications prescribed and insulin use are also related to HbA1c.
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Okazaki T, Tamai K, Shibuya R, Nakamura M, Mochizuki M, Yamaguchi K, Abe J, Takahashi S, Satoh K. P1.03-31 Periostin is a Negative Prognostic Factor and Promotes Cancer Cell Proliferation in Non-Small Cell Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.712] [Citation(s) in RCA: 1] [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: 11/28/2022]
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Musha I, Mochizuki M, Kikuchi T, Akatsuka J, Ohtake A, Kobayashi K, Kikuchi N, Kawamura T, Yokota I, Urakami T, Sugihara S, Amemiya S. Estimation of glycaemic control in the past month using ratio of glycated albumin to HbA 1c. Diabet Med 2018; 35:855-861. [PMID: 29653463 DOI: 10.1111/dme.13640] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/03/2018] [Indexed: 12/28/2022]
Abstract
AIMS To evaluate comprehensively the use of the glycated albumin to HbA1c ratio for estimation of glycaemic control in the previous month. METHODS A total of 306 children with Type 1 diabetes mellitus underwent ≥10 simultaneous measurements of glycated albumin and HbA1c . Correlation and concordance rates were examined between HbA1c measurements taken 1 month apart (ΔHbA1c ) and glycated albumin/HbA1c ratio fluctuations were calculated as Z-scores from the cohort value at enrolment of this study cohort (method A) or the percent difference from the individual mean over time (method B). RESULTS Fluctuations in glycated albumin/HbA1c ratio (using both methods) were weakly but significantly correlated with ΔHbA1c , whereas concordance rates were significant for glycaemic deterioration but not for glycaemic improvement. Concordance rates were higher using method B than method A. CONCLUSIONS The glycated albumin/HbA1c ratio was able to estimate glycaemic deterioration in the previous month, while estimation of glycaemic improvement in the preceding month was limited. Because method B provided a better estimate of recent glycaemic control than method A, the individual mean of several measurements of the glycated albumin/HbA1c ratio over time may also identify individuals with high or low haemoglobin glycation phenotypes in a given population, such as Japanese children with Type 1 diabetes, thereby allowing more effective diabetes management.
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Affiliation(s)
- I Musha
- Department of Paediatrics, Saitama Medical University, Saitama, Japan
| | - M Mochizuki
- Department of Paediatrics, University of Yamanashi, Yamanashi, Japan
| | - T Kikuchi
- Department of Paediatrics, Saitama Medical University, Saitama, Japan
| | - J Akatsuka
- Department of Paediatrics, Saitama Medical University, Saitama, Japan
| | - A Ohtake
- Department of Paediatrics, Saitama Medical University, Saitama, Japan
| | - K Kobayashi
- Department of Paediatrics, University of Yamanashi, Yamanashi, Japan
| | - N Kikuchi
- Department of Paediatrics, Yokohama City Minato Red Cross Hospital, Kanagawa, Japan
| | - T Kawamura
- Department of Paediatrics, Osaka City University Graduate School of Medicine, Osaka, Japan
| | - I Yokota
- Division of Paediatrics Endocrinology and Metabolism, Shikoku Medical Centre for Children and Adults, Kagawa, Japan
| | - T Urakami
- Department of Paediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - S Sugihara
- Department of Paediatrics, Tokyo Women's Medical University Medical Centre East, Tokyo, Japan
| | - S Amemiya
- Department of Paediatrics, Saitama Medical University, Saitama, Japan
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Isawa M, Tashiro R, Naruse C, Yamaguchi Y, Itoh H, Nishimura T, Tomi M, Shimada H, Saito H, Mochizuki M, Nakashima E. Effect of serotonin transporter genotype on self-reported efficacy and activity changes of brain prefrontal area in response to placebo. Pharmazie 2018; 73:35-41. [PMID: 29441949 DOI: 10.1691/ph.2018.7740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
Patients benefit from drug therapy not only through pharmacological mechanisms, but also through non-pharmacological action (placebo effect), which may be mediated in part by the prefrontal area of the brain. We consider that the difference between responders and non-responders to placebo might be related to polymorphisms in the serotonin transporter-linked polymorphic region (5-HTTLPR). To study this idea, we performed a randomized double-blind clinical trial using caffeine and lactose (placebo). Activity in the prefrontal area of the brain was measured in terms of blood flow by means of near-infrared spectroscopy (NIRS) as an objective indicator. Self-reported feelings of drowsiness on established scales were used as subjective indicators. Twenty-one subjects in block A took caffeine on the first day and placebo on the third day, and 21 in block B took placebo on the first day and placebo on the third day. After placebo administration, improvement of sleepiness was significantly enhanced, a similar extent to that after caffeine medication. Among the 42 subjects, 22 showed S/S type polymorphism in the serotonin transporter (52.4 %), 17 showed S/L type (40.5 %) and 3 showed L/L type (7.10 %). Statistical analysis of the results indicate that subjects with L/L genotype showed a significantly greater placebo response in terms of both self-reported feeling of drowsiness and blood flow in the prefrontal area of the brain associated with working memory (46 area). Our results indicate that the L/L genotype of 5-HTTLPR, which is rare in Japanese (3.2 %) but common in Americans (32.2 %), may be associated with a greater placebo effect.
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Ishiguchi H, Kobayashi S, Kohno M, Nanno T, Myoren T, Oda S, Tateishi H, Mochizuki M, Oda T, Yamada J, Okamura T, Yano M. P5408Urinary 8-hydroxy-2-deoxyguanosine as a novel myocardial oxidative stress marker for sustained ventricular tachycardia in patients with active cardiac sarcoidosis. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx493.p5408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Nakayama S, Hamasaki S, Ueno K, Mochizuki M, Yusa S, Nakamura Y, Fujii S. Foams stabilized with solid particles carrying stimuli-responsive polymer hairs. Soft Matter 2016; 12:4794-4804. [PMID: 27109907 DOI: 10.1039/c6sm00425c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Submicrometer-sized polystyrene (PS) particles carrying stimuli-responsive poly[2-(diethylamino)ethyl methacrylate] (PDEA) hairs with degrees of polymerization of 30, 60 and 90 were synthesized by dispersion polymerization and used as a particulate foam stabilizer. The effects of the composition of these PDEA-PS particles and foam formation conditions on foamability, foam stability and foam microstructures were extensively investigated. The hairy particles were found to work as an effective stabilizer of aqueous foams in basic media, in which the PDEA hairs are not protonated and thus the particle surfaces exhibit suitable wettability at the air-water interface. In contrast, little to no foam or unstable foams were formed in acidic aqueous media, in which the hairs are protonated and are therefore water soluble. Particles carrying longer hairs resulted in greater foamability and more highly stabilized foams that were capable of persisting for more than one month. Foams were found to form in a narrower pH range when using PS particles with longer hairs, due to both entropic and image charge effects. Data obtained from the touch mixer mixing method showed that both foamability and foam stability increased with increases in the concentration of polymer particles up to 10 wt%, because higher concentrations allowed greater air-water interfacial areas to be stabilized. Conversely, only minimal foam was obtained at and above 15 wt% because of the high viscosity of the resulting aqueous particle dispersion. Trials using the homogenizer mixing method showed that foam with a cream-like texture could be formed even at 40 wt% particle concentration as a result of the improved mixing efficiency. Defoamation could be induced by exposing the foams to HCl vapor. Exposure to acidic vapor led to in situ protonation of the 2-(diethylamino)ethyl methacrylate residues, rendering the PDEA hairs hydrophilic and water soluble, and desorption of the PDEA-PS particles from the air-water interface.
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Affiliation(s)
- S Nakayama
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
| | - S Hamasaki
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
| | - K Ueno
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
| | - M Mochizuki
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
| | - S Yusa
- Department of Applied Chemistry, University of Hyogo, 2167 Shosha, Himeji, Hyogo 671-2280, Japan
| | - Y Nakamura
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan. and Nanomaterials Microdevices Research Center, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan
| | - S Fujii
- Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1, Omiya, Asahi-ku, Osaka 535-8585, Japan.
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Kusakisako K, Masatani T, Miyata T, Galay RL, Maeda H, Talactac MR, Tsuji N, Mochizuki M, Fujisaki K, Tanaka T. Functional analysis of recombinant 2-Cys peroxiredoxin from the hard tick Haemaphysalis longicornis. Insect Mol Biol 2016; 25:16-23. [PMID: 26471013 DOI: 10.1111/imb.12193] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Ticks are obligate haematophagous arthropods that feed on vertebrate blood containing high levels of iron. The host-derived iron reacts to oxygen in the tick's body, and then high levels of reactive oxygen species, including hydrogen peroxide (H(2)O(2)), may be generated. High levels of H(2)O(2) cause oxidative stress to aerobic organisms. Therefore, antioxidant responses are necessary to control H(2)O(2). We focused on peroxiredoxins (Prxs), H(2)O(2) -scavenging enzymes. The sequence of Haemaphysalis longicornis 2-Cys Prx (HlPrx2) was identified from fat body cDNA libraries of this tick and recombinant HlPrx2 was then prepared using Escherichia coli. By comparison with the 2-Cys Prxs of other organisms, we found two conserved cysteines in HlPrx2, Cys51 and Cys172. We examined the antioxidant activity of HlPrx2 and mutant proteins produced by a single base substitution, converting one or both of these cysteines into serines. The assays revealed that proteins containing Cys51 showed antioxidant activity when H(2)O(2) was removed. Sodium dodecyl sulphate polyacrylamide gel electrophoresis and size-exclusion chromatography demonstrated that only the wild-type HlPrx2 formed homodimers and that all of the proteins that we made had a high molecular weight peak. These results indicate that both Cys51 and Cys172 are essential for the dimerization of HlPrx2, whereas only the Cys51 residue is necessary for antioxidant activity.
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Affiliation(s)
- K Kusakisako
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto, Kagoshima, Japan
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, Japan
| | - T Masatani
- Joint Faculty of Veterinary Medicine, Transboundary Animal Diseases Center, Kagoshima University, Korimoto, Kagoshima, Japan
| | - T Miyata
- Laboratory of Food Chemistry, Department of Biochemistry and Biotechnology, Division of Molecular Function of Food, Faculty of Agriculture, Kagoshima University, Korimoto, Kagoshima, Japan
| | - R L Galay
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto, Kagoshima, Japan
- Department of Veterinary Paraclinical Sciences, College of Veterinary Medicine, University of the Philippines Los Baños, Los Baños, Laguna, The Philippines
| | - H Maeda
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto, Kagoshima, Japan
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, Japan
| | - M R Talactac
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto, Kagoshima, Japan
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, Japan
| | - N Tsuji
- Department of Parasitology, Kitasato University School of Medicine, Minami, Sagamihara, Kanagawa, Japan
| | - M Mochizuki
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto, Kagoshima, Japan
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, Japan
| | - K Fujisaki
- Zen-Noh Institute of Animal Health, Ohja, Sakura, Chiba, Japan
| | - T Tanaka
- Laboratory of Infectious Diseases, Joint Faculty of Veterinary Medicine, Kagoshima University, Korimoto, Kagoshima, Japan
- Department of Pathological and Preventive Veterinary Science, The United Graduate School of Veterinary Science, Yamaguchi University, Yoshida, Yamaguchi, Japan
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Takano T, Okutomi Y, Mochizuki M, Ochiai Y, Yamada F, Mori M, Ueda F. Biological index of environmental lead pollution: accumulation of lead in liver and kidney in mice. Environ Monit Assess 2015; 187:744. [PMID: 26563231 DOI: 10.1007/s10661-015-4958-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Accepted: 11/02/2015] [Indexed: 06/05/2023]
Abstract
Lead (Pb) is known to be highly poisonous, and the acute poisoning of Cd causes the abdominal pains, vomiting, and shock. The digestive and nervous symptom is observed in the chronic lead poisoning. It was also known that the defect in hemoglobin synthesis by Pb produce anemia. The release of Pb into the environment presents a source of exposure for wild animals. In this study, we examined the utility of a new Pb-monitoring index in mice administered Pb. A solution containing 0.02, 0.2, 2, or 4 ppm lead chloride (PbCl2) was administered intraperitoneally to mice, and the Pb contents of the kidney and liver were determined at designated time points. The mean Pb content of both organs increased depending on the administered Pb dosage. Although the results of control was near the detection limits, the administration of 4 ppm in 4 weeks resulted in Pb levels of 260 mg ppm/wet weight and 110 ppm wet weight in the kidney and liver, respectively. However, there were no significant relationships among administered dose, duration of Pb treatment, and liver or kidney Pb content. Then, values in all mice administered control or 0.02 mg Pb were located inside the ellipse, representing the confidence area of the new index, and values in all mice administered more than 2 mg Pb were located outside the ellipse. These results confirm that animals exposed to high concentrations of Pb would be detected by this new index.
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Affiliation(s)
- T Takano
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo, 180-8602, Japan
| | - Y Okutomi
- Department of Applied Science, School of Veterinary Nursing and Technology, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo, 180-8602, Japan
| | - M Mochizuki
- Department of Applied Science, School of Veterinary Nursing and Technology, Faculty of Veterinary Science, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo, 180-8602, Japan
| | - Y Ochiai
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo, 180-8602, Japan
| | - F Yamada
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo, 180-8602, Japan
- Saitama Institute of Public Health, 410-1 Ewai, Yochimi-cho hiki-gun, Saitama, 335-0133, Japan
| | - M Mori
- Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, Shizuoka, 422-8529, Japan
| | - F Ueda
- Department of Preventive Veterinary Medicine, School of Veterinary Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan, Musashino, Tokyo, 180-8602, Japan.
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15
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Kézsmárki I, Bordács S, Milde P, Neuber E, Eng LM, White JS, Rønnow HM, Dewhurst CD, Mochizuki M, Yanai K, Nakamura H, Ehlers D, Tsurkan V, Loidl A. Néel-type skyrmion lattice with confined orientation in the polar magnetic semiconductor GaV4S8. Nat Mater 2015; 14:1116-1122. [PMID: 26343913 DOI: 10.1038/nmat4402] [Citation(s) in RCA: 142] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 07/21/2015] [Indexed: 06/05/2023]
Abstract
Following the early prediction of the skyrmion lattice (SkL)--a periodic array of spin vortices--it has been observed recently in various magnetic crystals mostly with chiral structure. Although non-chiral but polar crystals with Cnv symmetry were identified as ideal SkL hosts in pioneering theoretical studies, this archetype of SkL has remained experimentally unexplored. Here, we report the discovery of a SkL in the polar magnetic semiconductor GaV4S8 with rhombohedral (C3v) symmetry and easy axis anisotropy. The SkL exists over an unusually broad temperature range compared with other bulk crystals and the orientation of the vortices is not controlled by the external magnetic field, but instead confined to the magnetic easy axis. Supporting theory attributes these unique features to a new Néel-type of SkL describable as a superposition of spin cycloids in contrast to the Bloch-type SkL in chiral magnets described in terms of spin helices.
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Affiliation(s)
- I Kézsmárki
- Department of Physics, Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group, 1111 Budapest, Hungary
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - S Bordács
- Department of Physics, Budapest University of Technology and Economics and MTA-BME Lendület Magneto-optical Spectroscopy Research Group, 1111 Budapest, Hungary
| | - P Milde
- Institut für Angewandte Photophysik, TU Dresden, D-01069 Dresden, Germany
| | - E Neuber
- Institut für Angewandte Photophysik, TU Dresden, D-01069 Dresden, Germany
| | - L M Eng
- Institut für Angewandte Photophysik, TU Dresden, D-01069 Dresden, Germany
| | - J S White
- Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen, Switzerland
| | - H M Rønnow
- Laboratory for Quantum Magnetism, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - C D Dewhurst
- Institut Laue-Langevin, 6 rue Jules Horowitz 38042 Grenoble, France
| | - M Mochizuki
- Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 229-8558, Japan
- PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - K Yanai
- Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 229-8558, Japan
| | - H Nakamura
- Department of Materials Science and Engineering, Kyoto University, Kyoto 606-8501, Japan
| | - D Ehlers
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
| | - V Tsurkan
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
- Institute of Applied Physics, Academy of Sciences of Moldova, MD 2028, Chisinau, Republica Moldova
| | - A Loidl
- Experimental Physics V, Center for Electronic Correlations and Magnetism, University of Augsburg, 86135 Augsburg, Germany
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16
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Mochizuki M, Yu XZ, Seki S, Kanazawa N, Koshibae W, Zang J, Mostovoy M, Tokura Y, Nagaosa N. Thermally driven ratchet motion of a skyrmion microcrystal and topological magnon Hall effect. Nat Mater 2014; 13:241-246. [PMID: 24464244 DOI: 10.1038/nmat3862] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2013] [Accepted: 12/10/2013] [Indexed: 06/03/2023]
Abstract
Spontaneously emergent chirality is an issue of fundamental importance across the natural sciences. It has been argued that a unidirectional (chiral) rotation of a mechanical ratchet is forbidden in thermal equilibrium, but becomes possible in systems out of equilibrium. Here we report our finding that a topologically nontrivial spin texture known as a skyrmion--a particle-like object in which spins point in all directions to wrap a sphere--constitutes such a ratchet. By means of Lorentz transmission electron microscopy we show that micrometre-sized crystals of skyrmions in thin films of Cu2OSeO3 and MnSi exhibit a unidirectional rotation motion. Our numerical simulations based on a stochastic Landau-Lifshitz-Gilbert equation suggest that this rotation is driven solely by thermal fluctuations in the presence of a temperature gradient, whereas in thermal equilibrium it is forbidden by the Bohr-van Leeuwen theorem. We show that the rotational flow of magnons driven by the effective magnetic field of skyrmions gives rise to the skyrmion rotation, therefore suggesting that magnons can be used to control the motion of these spin textures.
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Affiliation(s)
- M Mochizuki
- 1] Department of Physics and Mathematics, Aoyama Gakuin University, Sagamihara, Kanagawa 229-8558, Japan [2] PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan
| | - X Z Yu
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - S Seki
- 1] PRESTO, Japan Science and Technology Agency, Kawaguchi, Saitama 332-0012, Japan [2] RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan [3] Department of Applied Physics, Quantum-Phase Electronics Center, The University of Tokyo, Bunkyo-ku Tokyo 113-8656, Japan
| | - N Kanazawa
- Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - W Koshibae
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - J Zang
- Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - M Mostovoy
- Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Y Tokura
- 1] RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan [2] Department of Applied Physics, Quantum-Phase Electronics Center, The University of Tokyo, Bunkyo-ku Tokyo 113-8656, Japan [3] Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - N Nagaosa
- 1] RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan [2] Department of Applied Physics, Quantum-Phase Electronics Center, The University of Tokyo, Bunkyo-ku Tokyo 113-8656, Japan [3] Department of Applied Physics, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan
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17
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Suzuki Y, Kiyosawa M, Wakakura M, Mochizuki M, Ishiwata K, Oda K, Ishii K. Glucose hypermetabolism in the thalamus of patients with drug-induced blepharospasm. Neuroscience 2014; 263:240-9. [PMID: 24462606 DOI: 10.1016/j.neuroscience.2014.01.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [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: 08/10/2013] [Revised: 01/13/2014] [Accepted: 01/14/2014] [Indexed: 12/26/2022]
Abstract
We examined the difference in cerebral function alterations between drug-induced blepharospasm patients and essential blepharospasm (EB) patients by using positron emission tomography with (18)F-fluorodeoxyglucose. Cerebral glucose metabolism was examined in 21 patients with drug-induced blepharospasm (5 men and 16 women; mean age, 53.1 [range, 29-78] years), 21 essential EB patients (5 men and 16 women; mean age, 53.0 [range, 33-72] years) and 24 healthy subjects (6 men and 18 women; mean age, 57.9 [range, 22-78] years) with long-term history of benzodiazepines use (drug healthy subjects). Drug-induced blepharospasm patients developed symptoms while taking benzodiazepines or thienodiazepines. Sixty-three normal volunteers (15 men and 48 women; mean age, 53.6 [range, 20-70] years) were examined as controls. Differences between the patient groups and control group were examined by statistical parametric mapping. Additionally, we defined regions of interests on both sides of the thalamus, caudate nucleus, anterior putamen, posterior putamen and primary somatosensory area. The differences between groups were tested using two-sample t-tests with Bonferroni correction for multiple comparisons. Cerebral glucose hypermetabolism on both side of the thalamus was detected in drug-induced blepharospasm, EB patients and drug healthy subjects by statistical parametric mapping. In the analysis of regions of interest, glucose metabolism in both sides of the thalamus in the drug-induced blepharospasm group was significantly lower than that in the EB group. Moreover, we observed glucose hypermetabolism in the anterior and posterior putamen bilaterally in EB group but not in drug-induced blepharospasm group and drug healthy subjects. Long-term regimens of benzodiazepines or thienodiazepines may cause down-regulation of benzodiazepine receptors in the brain. We suggest that the functional brain alteration in drug-induced blepharospasm patients is similar to that in EB patients, and that alteration of the GABAergic system might be related to the pathology of both blepharospasm types.
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Affiliation(s)
- Y Suzuki
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Graduate School, Tokyo, Japan; Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan; All Japan Federation of Social Insurance Associations Mishima Hospital, Mishima, Japan.
| | - M Kiyosawa
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Graduate School, Tokyo, Japan; Kiyosawa Eye Clinic, Tokyo, Japan
| | | | - M Mochizuki
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Graduate School, Tokyo, Japan
| | - K Ishiwata
- Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - K Oda
- Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
| | - K Ishii
- Research Team for Neuroimaging, Tokyo Metropolitan Institute of Gerontology, Tokyo, Japan
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18
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Okamura Y, Kagawa F, Mochizuki M, Kubota M, Seki S, Ishiwata S, Kawasaki M, Onose Y, Tokura Y. Microwave magnetoelectric effect via skyrmion resonance modes in a helimagnetic multiferroic. Nat Commun 2013; 4:2391. [DOI: 10.1038/ncomms3391] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Accepted: 08/02/2013] [Indexed: 11/09/2022] Open
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19
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Choisunirachon N, Jaroensong T, Yoshida K, Saeki K, Mochizuki M, Nishimura R, Sasaki N, Nakagawa T. Effects of low-dose cyclophosphamide with piroxicam on tumour neovascularization in a canine oral malignant melanoma-xenografted mouse model. Vet Comp Oncol 2013; 13:424-32. [DOI: 10.1111/vco.12059] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- N. Choisunirachon
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
- Department of Veterinary Surgery; Faculty of Veterinary Science, Chulalongkorn University; Bangkok Thailand
| | - T. Jaroensong
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
- Department of Companion Animal Clinical Sciences; Faculty of Veterinary Medicine, Kasetsart University; Bangkok Thailand
| | - K. Yoshida
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - K. Saeki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - M. Mochizuki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - R. Nishimura
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - N. Sasaki
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
| | - T. Nakagawa
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences; The University of Tokyo; Tokyo Japan
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20
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Shinkai T, Enishi O, Mitsumori M, Higuchi K, Kobayashi Y, Takenaka A, Nagashima K, Mochizuki M, Kobayashi Y. Mitigation of methane production from cattle by feeding cashew nut shell liquid. J Dairy Sci 2013; 95:5308-5316. [PMID: 22916936 DOI: 10.3168/jds.2012-5554] [Citation(s) in RCA: 45] [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] [Received: 03/21/2012] [Accepted: 05/04/2012] [Indexed: 11/19/2022]
Abstract
The effects of cashew nut shell liquid (CNSL) feeding on methane production and rumen fermentation were investigated by repeatedly using 3 Holstein nonlactating cows with rumen fistulas. The cows were fed a concentrate and hay diet (6:4 ratio) for 4 wk (control period) followed by the same diet with a CNSL-containing pellet for the next 3 wk (CNSL period). Two trials were conducted using CNSL pellets blended with only silica (trial 1) or with several other ingredients (trial 2). Each pellet type was fed to cows to allow CNSL intake at 4 g/100 kg of body weight per day. Methane production was measured in a respiration chamber system, and energy balance, nutrient digestibility, and rumen microbial changes were monitored. Methane production per unit of dry matter intake decreased by 38.3 and 19.3% in CNSL feeding trials 1 and 2, respectively. Energy loss as methane emission decreased from 9.7 to 6.1% (trial 1) and from 8.4 to 7.0% (trial 2) with CNSL feeding, whereas the loss to feces (trial 1) and heat production (trial 2) increased. Retained energy did not differ between the control and CNSL periods. Digestibility of dry matter and gross energy decreased with CNSL feeding in trial 1, but did not differ in trial 2. Feeding CNSL caused a decrease in acetate and total short-chain fatty acid levels and an increase in propionate proportion in both trials. Relative copy number of methyl coenzyme-M reductase subunit A gene and its expression decreased with CNSL feeding. The relative abundance of fibrolytic or formate-producing species such as Ruminococcus flavefaciens, Butyrivibrio fibrisolvens, and Treponema bryantii decreased, but species related to propionate production, including Prevotella ruminicolla, Selenomonas ruminantium, Anaerovibrio lipolytica, and Succinivibrio dextrinosolvens, increased. If used in a suitable formulation, CNSL acts as a potent methane-inhibiting and propionate-enhancing agent through the alteration of rumen microbiota without adversely affecting feed digestibility.
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Affiliation(s)
- T Shinkai
- National Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan
| | - O Enishi
- National Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan
| | - M Mitsumori
- National Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan
| | - K Higuchi
- National Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan
| | - Y Kobayashi
- National Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan
| | - A Takenaka
- National Institute of Livestock and Grassland Science, Ibaraki 305-0901, Japan
| | - K Nagashima
- Environment and Biotechnology Laboratory, Idemitsu Kosan Co. Ltd., Sodegaura 299-0293, Japan
| | - M Mochizuki
- Environment and Biotechnology Laboratory, Idemitsu Kosan Co. Ltd., Sodegaura 299-0293, Japan
| | - Y Kobayashi
- Research Faculty of Agriculture, Hokkaido University, Hokkaido 060-8589, Japan.
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21
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Yoshida K, Saito T, Kamida A, Matsumoto K, Saeki K, Mochizuki M, Sasaki N, Nakagawa T. Transforming growth factor-β transiently induces vimentin expression and invasive capacity in a canine mammary gland tumor cell line. Res Vet Sci 2012. [PMID: 23182613 DOI: 10.1016/j.rvsc.2012.10.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The epithelial-mesenchymal transition (EMT) is a crucial event that occurs during cancer metastasis and can be induced by transforming growth factor-β (TGF-β) in various tumor cells in vitro. However, little is known about the effects of TGF-β in canine mammary gland tumors (CMGTs). Here, we investigated the role of TGF-β in CMGT. We observed that treatment of the CMGT cell line CHMp13a with TGF-β1 leads to transient induction of the mesenchymal marker vimentin. Real-time measurements of cellular electrical impedance also showed that CMGT invasiveness is transiently increased by TGF-β1 treatment, but is reversed after prolonged stimulation. This phenomenon is similar to the mesenchymal-epithelial transition (MET, the reverse phenomenon of EMT), and a process that is implicated in the establishment of secondary metastatic lesions.
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Affiliation(s)
- K Yoshida
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan
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22
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Shiomi Y, Mochizuki M, Kaneko Y, Tokura Y. Hall effect of spin-chirality origin in a triangular-lattice helimagnet Fe{1.3}Sb. Phys Rev Lett 2012; 108:056601. [PMID: 22400946 DOI: 10.1103/physrevlett.108.056601] [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] [Received: 09/09/2011] [Indexed: 05/31/2023]
Abstract
We report on a topological Hall effect possibly induced by scalar spin chirality in a quasi-two-dimensional helimagnet Fe{1+δ}Sb. In the low-temperature region where the spins on interstitial-Fe (concentration δ∼0.3) intervening the 120° spin-ordered triangular planes tend to freeze, a nontrivial component of Hall resistivity with opposite sign of the conventional anomalous Hall term is observed under magnetic field applied perpendicular to the triangular-lattice plane. The observed unconventional Hall effect is ascribed to the scalar spin chirality arising from the heptamer spin clusters around the interstitial-Fe sites, which can be induced by the spin modulation by the Dzyaloshinsky-Moriya interaction.
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Affiliation(s)
- Y Shiomi
- Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
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23
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Wadati H, Okamoto J, Garganourakis M, Scagnoli V, Staub U, Yamasaki Y, Nakao H, Murakami Y, Mochizuki M, Nakamura M, Kawasaki M, Tokura Y. Origin of the large polarization in multiferroic YMnO3 thin films revealed by soft- and hard-X-ray diffraction. Phys Rev Lett 2012; 108:047203. [PMID: 22400885 DOI: 10.1103/physrevlett.108.047203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2011] [Indexed: 05/31/2023]
Abstract
We investigated the magnetic structure of an orthorhombic YMnO(3) thin film by resonant soft x-ray and hard x-ray diffraction. We observed a temperature-dependent incommensurate magnetic reflection below 45 K and a commensurate lattice-distortion reflection below 35 K. These results demonstrate that the ground state is composed of coexisting E-type and cycloidal states. Their different ordering temperatures clarify the origin of the large polarization to be caused by the E-type antiferromagnetic states in the orthorhombic YMnO(3) thin film.
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Affiliation(s)
- H Wadati
- Department of Applied Physics and Quantum-Phase Electronics Center, University of Tokyo, Hongo, Tokyo 113-8656, Japan.
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Jaroensong T, Endo Y, Lee SJ, Kamida A, Mochizuki M, Nishimura R, Sasaki N, Nakagawa T. Effects of transplantation sites on tumour growth, pulmonary metastasis and ezrin expression of canine osteosarcoma cell lines in nude mice. Vet Comp Oncol 2011; 10:274-82. [PMID: 22236104 DOI: 10.1111/j.1476-5829.2011.00294.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To determine the influence of the transplantation site of canine osteosarcoma (OS) cell lines on tumour growth and pulmonary metastasis, three OS cell lines were transplanted into nude mice via subcutaneous (SC), intratibial (IT) or intravenous (IV) injection. IT-xenografts exhibited greater potential for developing primary masses and pulmonary metastasis than SC-xenografts. In IT and IV xenografts, lung micrometastases along with phosphorylated ezrin-radixin-moesin (p-ERM) overexpression were found in mice xenografted with HMPOS and OOS cells after 1 week and metastasis was found with decreased p-ERM expression at later time points. The expression of ezrin and p-ERM in the primary tumours of IT-xenografted mice was higher than those in SC-xenografted mice with HMPOS and OOS cells. The results suggest that the orthotopic transplantation site plays an important role in the spontaneous metastasis of canine OS and that ezrin phosphorylation may be involved in the early metastatic mechanism of canine OS cells.
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Affiliation(s)
- T Jaroensong
- Laboratory of Veterinary Surgery, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo, Japan
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25
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26
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Rovillain P, Cazayous M, Gallais Y, Measson MA, Sacuto A, Sakata H, Mochizuki M. Magnetic field induced dehybridization of the electromagnons in multiferroic TbMnO₃. Phys Rev Lett 2011; 107:027202. [PMID: 21797635 DOI: 10.1103/physrevlett.107.027202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 05/30/2011] [Indexed: 05/31/2023]
Abstract
We have studied the impact of the magnetic field on the electromagnon excitations in TbMnO₃ crystal. Applying a magnetic field along the c axis, we show that the electromagnons transform into pure antiferromagnetic modes, losing their polar character. Entering in the paraelectric phase, we are able to track the spectral weight transfer from the electromagnons to the magnon excitations and we discuss the magnetic excitations underlying the electromagnons. We also point out the phonons involved in the phase transition process. This reveals that the Mn-O distance plays a key role in understanding the ferroelectricity and the polar character of the electromagnons. Magnetic field measurements along the b axis allow us to detect a new electromagnon resonance in agreement with a Heisenberg model.
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Affiliation(s)
- P Rovillain
- Laboratoire Matériaux et Phénomènes Quantiques (UMR 7162 CNRS), Université Paris Diderot-Paris 7, 75205 Paris cedex 13, France
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27
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Sato M, Ishikawa T, Ujihara N, Yoshida S, Fujita M, Mochizuki M, Asada A. Displacement Above the Hypocenter of the 2011 Tohoku-Oki Earthquake. Science 2011; 332:1395. [DOI: 10.1126/science.1207401] [Citation(s) in RCA: 335] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Watanabe Y, Suzuki R, Koike S, Nagashima K, Mochizuki M, Forster RJ, Kobayashi Y. In vitro evaluation of cashew nut shell liquid as a methane-inhibiting and propionate-enhancing agent for ruminants. J Dairy Sci 2011; 93:5258-67. [PMID: 20965342 DOI: 10.3168/jds.2009-2754] [Citation(s) in RCA: 53] [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] [Received: 09/21/2009] [Accepted: 07/10/2010] [Indexed: 11/19/2022]
Abstract
Cashew nut shell liquid (CNSL) containing antibacterial phenolic compounds was evaluated for its potency as a feed additive for ruminants. In experiment 1, ruminal responses to CNSL supplementation were assessed using a batch culture system. Rumen fluid from cattle was diluted with artificial saliva and incubated for 18h in a batch culture with a mixed diet containing a 30:70 hay:concentrate diet to which raw or heated CNSL was added at a final concentration of 500 μg/mL. In experiment 2, a Rusitec, using rumen fluid from the same cattle, was operated over a period of 7 d during which only raw CNSL was tested at concentrations of 0, 50, 100, or 200 μg/mL, and variations in fermentation and bacterial population were assessed. In experiment 3, a pure culture study was conducted using selected bacteria to determine their susceptibility to CNSL. In experiment 1, methane production was inhibited by raw CNSL (56.9% inhibition) but not by heated CNSL. Total volatile fatty acid concentration was not affected, whereas increased concentrations of propionate and decreased concentrations of acetate and butyrate were observed using either raw or heated CNSL. These changes were more obvious when raw CNSL was tested. In experiment 2, raw CNSL inhibited methanogenesis and increased propionate production in a dose-dependent manner, showing maximum methane inhibition (70.1%) and propionate enhancement (44.4%) at 200 μg/mL supplementation. Raw CNSL increased total volatile fatty acid concentration and dry matter digestibility. Raw CNSL also appeared to induce a dramatic shift in the population of rumen microbiota, based on decreased protozoa numbers and changes in quantitative PCR assay values for representative bacterial species. In experiment 3, using pure cultures, raw CNSL prevented the growth of hydrogen-, formate-, and butyrate-producing rumen bacteria, but not the growth of bacteria involved in propionate production. Based on these data, raw CNSL, rich in the antibacterial phenolic compound anacardic acid, is a potential candidate feed additive with selective activity against rumen microbes, leading to fermentation that results in decreased methane and enhanced propionate production.
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Affiliation(s)
- Y Watanabe
- Research Faculty of Agriculture, Hokkaido University, Sapporo, Japan
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Sugita S, Yamada Y, Mochizuki M. Relationship between serum infliximab levels and acute uveitis attacks in patients with Behcet disease. Br J Ophthalmol 2010; 95:549-52. [DOI: 10.1136/bjo.2009.174888] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Yamada Y, Sugita S, Tanaka H, Kamoi K, Takase H, Mochizuki M. Timing of recurrent uveitis in patients with Behcet's disease receiving infliximab treatment. Br J Ophthalmol 2010; 95:205-8. [DOI: 10.1136/bjo.2009.168856] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Nakanishi H, Gotoh N, Yamada R, Yamashiro K, Otani A, Hayashi H, Tsujikawa A, Shimada N, Ohno-Matsui K, Mochizuki M, Saito M, Saito K, Iida T, Matsuda F, Yoshimura N. ARMS2/HTRA1 and CFH polymorphisms are not associated with choroidal neovascularization in highly myopic eyes of the elderly Japanese population. Eye (Lond) 2010; 24:1078-84. [PMID: 19680273 DOI: 10.1038/eye.2009.215] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
PURPOSE The purpose of this study was to investigate whether the genetic risk factors of age-related macular degeneration (AMD) are associated with the development of choroidal neovascularization (CNV) in highly myopic eyes of elderly Japanese. METHODS Highly myopic elderly Japanese patients with and without CNV were genotyped for three AMD-associated single nucleotide polymorphisms (SNPs), namely rs10490924 (A69S) of ARMS2, rs11200638 of HTRA1, and rs1061170 (Y402H) of complement factor H (CFH), with the TaqMan SNP assay. One hundred and eighty-three unrelated highly myopic (axial lengths>26.00 mm or refractive errors>-6.0 diopters) Japanese patients with CNV who were >or=50 years of age (mean age+/-standard deviation of 62.7+/-6.3 years) and 170 highly myopic patients without CNV who were >or=50 years old (62.3+/-7.1 years) were studied. The differences in the genotypic distributions for the three SNPs between the two groups were tested with the Trend chi2 test, and logistic regression analyses were performed for age and gender adjustment. RESULTS No significant difference was detected in the distribution of the three SNPs, rs10490924 (P>0.1), rs11200638 (P>0.1), and rs1061170 (P>0.5), between the two groups even after adjustments for age and gender differences. CONCLUSION The genetic risk factors of AMD related to these SNPs do not contribute significantly to the development of CNV in a highly myopic elderly Japanese population.
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Affiliation(s)
- H Nakanishi
- Department of Ophthalmology and Visual Sciences, Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan.
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Ohshima T, Kawakami K, Abe T, Mochizuki M. A minute virus of canines (MVC: canine bocavirus) isolated from an elderly dog with severe gastroenteritis, and phylogenetic analysis of MVC strains. Vet Microbiol 2010; 145:334-8. [PMID: 20427134 PMCID: PMC7117362 DOI: 10.1016/j.vetmic.2010.03.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2010] [Revised: 03/29/2010] [Accepted: 03/31/2010] [Indexed: 11/28/2022]
Abstract
Two of the three adult dogs kept in a family developed severe gastroenteritis. From the feces of one of the affected dogs a minute virus of canines (MVC) was detected by PCR and virus isolation. That this virus had recently infected the dogs was indicated by high anti-MVC antibody titers of their sera. No other virus commonly associated with canine gastrointestinal disease was implicated. As no previous association of MVC infection and disease in aged dogs had been described, further characterization of the isolated virus was performed to determine if it had unique pathogenic or genetic properties. Experimental infection of adult dogs did not result in clinical disease and comparison of the viral genome with other MVCs did not reveal any novel elements. The American, Japanese and Korean MVC strains studied were closely related to bocaviruses of bovine and human origin, and appeared to have evolved uniquely in the dog population after dividing from the common ancestor of bocaviruses. Further detailed clinical and virological studies are warranted to define the role of MVCs in disease in adult dogs.
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Affiliation(s)
- T Ohshima
- Advanced Technology Development Center, Kyoritsu Seiyaku Corporation, Takamihara 2-9-22, Tsukuba, Ibaraki, Japan
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Yagasaki H, Kobayashi K, Saitou T, Nagamine K, Mitsui Y, Mochizuki M, Kobayashi K, Cho H, Ohyama K, Amemiya S, Nakazawa S. Nocturnal blood glucose and IGFBP-1 changes in type 1 diabetes: Differences in the dawn phenomenon between insulin regimens. Exp Clin Endocrinol Diabetes 2010; 118:195-9. [PMID: 19834874 DOI: 10.1055/s-0029-1239518] [Citation(s) in RCA: 7] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Insulin-like growth factor binding protein-1 (IGFBP-1) is known to regulate the bioavailability of insulin-like growth factor (IGF) and the levels of IGFBP-1 are increased in the morning in patients with type 1 diabetes mellitus. We investigated the nocturnal fluctuations of glucose, IGFBP-1, and free IGF-1 levels with three insulin regimens. RESEARCH DESIGN AND METHODS Forty-eight type 1 diabetes patients were divided into three groups according to their basal insulin therapy (continuous subcutaneous insulin infusion [CSII], insulin glargine, NPH insulin). Blood samples were obtained every 2 h between 2 300 h and 0700 h to measure plasma glucose, IGFBP-1 and free IGF-1 levels. RESULTS The dawn phenomenon was more frequent with NPH (62.1%) than with glargine (16.6%, p<0.05) and CSII (14.3%, p<0.05). In the NPH group, the serum IGFBP-1 levels were markedly increased from 21.0+/-3.6 ng/ml at 2 300 h to 200.3+/-21.8 ng/ml at 0700 h and free IGF-1 levels were inversely decreased; these changes were partially suppressed in the CSII and glargine groups. CONCLUSIONS The use of insulin regimens that provide sufficient insulin levels in the early morning can suppress the dawn phenomenon, leading to improved glycemic control. The increase in circulating IGFBP-1 in the morning, as a result of waning of insulin action, lowers free IGF-1 levels and may cause insulin resistance.
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Affiliation(s)
- H Yagasaki
- Department of Pediatrics, University of Yamanashi, Japan.
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Shimada N, Ohno-Matsui K, Yoshida T, Mochizuki M. Presence of paravascular lamellar holes in patients with idiopathic premacular fibrosis. Br J Ophthalmol 2010; 94:263, 265-6. [DOI: 10.1136/bjo.2008.156141] [Citation(s) in RCA: 2] [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: 11/03/2022]
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Tokunaga M, Yamasaki Y, Onose Y, Mochizuki M, Furukawa N, Tokura Y. Novel multiferroic state of Eu1-xYxMnO3 in high magnetic fields. Phys Rev Lett 2009; 103:187202. [PMID: 19905827 DOI: 10.1103/physrevlett.103.187202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2008] [Indexed: 05/28/2023]
Abstract
Magnetic and dielectric properties of Eu1-xYxMnO3 (x=0 and 0.4) are studied in pulsed magnetic fields up to 55 T. For x=0, application of magnetic fields higher than 20 T along the b axis causes magnetic transitions accompanied by generation of electric polarization (P) along the a axis. Similar first-order transitions are also observed in crystals of x=0.4, in which the ground state at zero magnetic field is already a ferroelectric P parallel a phase of different origin. Realistic model calculation indicates the presence of a novel multiferroic state induced by the spin exchange striction mechanism in high magnetic fields as an essential nature of the frustrated Mn spin system in this class of manganites.
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Affiliation(s)
- M Tokunaga
- The Institute for Solid State Physics (ISSP), The University of Tokyo, Chiba 277-8581, Japan.
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Yamada Y, Sugita S, Tanaka H, Kamoi K, Kawaguchi T, Mochizuki M. Comparison of infliximab versus ciclosporin during the initial 6-month treatment period in Behcet disease. Br J Ophthalmol 2009; 94:284-8. [DOI: 10.1136/bjo.2009.158840] [Citation(s) in RCA: 92] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Muhaya M, Lightman S, Ikeda E, Mochizuki M, Shaer B, McCluskey P, Towler H. Behçet's disease in Japan and in Great Britain: a comparative study. Ocul Immunol Inflamm 2009. [DOI: 10.1076/0927-3948(200009)831-kft141] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Kagawa F, Mochizuki M, Onose Y, Murakawa H, Kaneko Y, Furukawa N, Tokura Y. Dynamics of multiferroic domain wall in spin-cycloidal ferroelectric DyMnO3. Phys Rev Lett 2009; 102:057604. [PMID: 19257556 DOI: 10.1103/physrevlett.102.057604] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2008] [Indexed: 05/27/2023]
Abstract
We report the dielectric dispersion of the giant magnetocapacitance (GMC) in multiferroic DyMnO3 over a wide frequency range. The GMC is found to be attributable not to the softened electromagnon but to the electric-field-driven motion of multiferroic domain wall (DW). In contrast to conventional ferroelectric DWs, the present multiferroic DW motion holds an extremely high relaxation rate of approximately 10;{7} s;{-1} even at low temperatures. This mobile nature as well as the model simulation suggests that the multiferroic DW is not atomically thin as in ferroelectrics but thick, reflecting its magnetic origin.
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Affiliation(s)
- F Kagawa
- Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), c/o Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan
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Abstract
BACKGROUND At the initial stages of percutaneous transluminal coronary angioplasty (PTCA), several studies reported on the feasibility of coronary artery incision and dilatation leading to the extension of the PTCA technique. HYPOTHESIS This study was designed to determine the immediate and chronic results of cutting balloon (CB) angioplasty. METHODS This procedure was performed on 127 lesions in 110 patients (male 83%, age 61.8 +/- 9.3 years). RESULTS The overall procedural success rates for the CB were 93.7% (119 lesions) and 92.7% (102 patients), while solitary CB without pre- and/or postdilatation was 76.4% (91 lesions). There was one major in-hospital complication (Q-wave myocardial infarction, 0.9%), but there were no deaths or emergency coronary artery bypass graftings. Significant angiographic dissections (> or = grade C) occurred in four patients, and coronary perforation occurred in one. The successfully treated CB group (95 lesions) was matched with the successful conventional angioplasty group (PTCA group) for chronic result assessment in regard to reference vessel size and lesion characteristics. In the CB group, postprocedural minimal luminal diameters were significantly larger and the percentage of stenosis at the stenotic site was significantly lower compared with the PTCA group. Restenosis occurred in 22 lesions (23.1%). This showed a significantly lower restenosis rate compared with the PTCA group (42.1%). In addition, the restenosis rate of the CB without inclusion of the pre- and/or postdilatation-treated lesions was 19.7%. CONCLUSIONS (1) Cutting balloon angioplasty procedures can be performed with high success rates with few major inhospital events. (2) The restenosis rate in the CB group was significantly lower compared with the PTCA group.
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Affiliation(s)
- T Kondo
- Department of Cardiology, Komaki City Hospital, Aichi Prefecture, Japan
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Abstract
OBJECTIVES The purpose of this study was to investigate whether dopamine D(2) receptor binding was altered in the striatum of essential blepharospasm patients. METHODS Striatal dopamine D(2) receptor binding was measured with positron emission tomography and [(11)C]raclopride. We studied eight drug-naive patients with bilateral blepharospasm and eight age-matched normal controls. RESULTS The uptake indices in the blepharospasm group were significantly reduced by 11.7% in the caudate (P < 0.005), 11.6% in the anterior putamen (P < 0.0001), and 10.3% in the posterior putamen (P < 0.005) relative to the control group. CONCLUSIONS This study indicates decreased dopamine D(2) receptor binding in the entire striatal region of blepharospasm patients. The findings suggest that decreased dopamine D(2) receptor binding might be one of the predisposing factors that leads to the dysfunction of the motor circuit, resulting in the loss of broad inhibition of unwanted movements during an intended movement in blepharospasm patients.
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Affiliation(s)
- C Horie
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University Graduate School, Tokyo, Japan
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Takahashi Y, Kida N, Yamasaki Y, Fujioka J, Arima T, Shimano R, Miyahara S, Mochizuki M, Furukawa N, Tokura Y. Evidence for an electric-dipole active continuum band of spin excitations in multiferroic TbMnO3. Phys Rev Lett 2008; 101:187201. [PMID: 18999857 DOI: 10.1103/physrevlett.101.187201] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 08/05/2008] [Indexed: 05/27/2023]
Abstract
The wide range optical spectra on a multiferroic prototype TbMnO3 have been investigated to clarify the origin of spin excitations observed in the far-infrared region. We elucidate the full band structure, whose high energy edge (133 cm;{-1}) exactly corresponds to twice of the highest-lying magnon energy. Thus the origin of this absorption band is clearly assigned to two-magnon excitation driven by the electric field of light. There is an overlap between the two-magnon and phonon energy ranges, where the strong coupling between them is manifested by the frequency shift and transfer of oscillator strength of the phonon mode.
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Affiliation(s)
- Y Takahashi
- Multiferroics Project, ERATO, Japan Science and Technology Agency (JST), Japan c/o Department of Applied Physics, The University of Tokyo, Tokyo 113-8656, Japan
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Mochizuki M, Tomita I, Muramoto K, Shinzawa-Itoh K, Yamashita E, Tsukihara T, Yoshikawa S. X-ray crystal structural analysis of cyanide-binding cytochrome coxidase. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308090806] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Shimada N, Ohno-Matsui K, Yoshida T, Sugamoto Y, Tokoro T, Mochizuki M. Progression from macular retinoschisis to retinal detachment in highly myopic eyes is associated with outer lamellar hole formation. Br J Ophthalmol 2008; 92:762-4. [PMID: 18523081 PMCID: PMC2771850 DOI: 10.1136/bjo.2007.131359] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Aims: To investigate the morphological changes that occur during the development of an early retinal detachment (RD) from a myopic macular retinoschisis (MRS) by optical coherence tomography (OCT). Methods: The OCT images of five eyes of five consecutive patients with myopic MRS who developed an RD during the follow-up period were studied. Results: The progression from MRS to early RDs went through four stages. In stage 1, OCT images appeared to show a focal irregularity of the thickness of external retina. In stage 2, an outer lamellar hole developed within the thickened area and a small RD developed. In stage 3, the column-like structures overlying the hole seemed to be separated horizontally, and the outer lamellar hole appeared to be larger vertically. In stage 4, the upper edge of the external retina was further elevated and attached to the upper part of the retinoschisis layer accompanied by further enlargement of the RD. Conclusions: This longitudinal study showed that the progression from myopic MRS to RD passes through four stages, and the formation of an outer lamellar hole predisposes the retina to a RD. These OCT findings might be useful for considering the surgical indication for eyes with a myopic MRS.
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Affiliation(s)
- N Shimada
- Department of Ophthalmology and Visual Science, Tokyo Medical and Dental University, Tokyo, Japan
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Sugita S, Shimizu N, Watanabe K, Mizukami M, Morio T, Sugamoto Y, Mochizuki M. Use of multiplex PCR and real-time PCR to detect human herpes virus genome in ocular fluids of patients with uveitis. Br J Ophthalmol 2008; 92:928-32. [PMID: 18408082 PMCID: PMC2564807 DOI: 10.1136/bjo.2007.133967] [Citation(s) in RCA: 150] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To measure the genomic DNA of human herpes viruses (HHV) in the ocular fluids and to analyse the clinical relevance of HHV in uveitis. METHODS After informed consent was obtained, a total of 111 ocular fluid samples (68 aqueous humour and 43 vitreous fluid samples) were collected from 100 patients with uveitis. The samples were assayed for HHV-DNA (HHV1-8) by using two different polymerase chain reaction (PCR) assays, qualitative PCR (multiplex PCR) and quantitative PCR (real-time PCR). RESULTS In all of the patients with acute retinal necrosis (n = 16) that were tested, either the HSV1 (n = 2), HSV2 (n = 3), or VZV (n = 11) genome was detected. In all patients, high copy numbers of the viral DNA were also noted, indicating the presence of viral replication. In another 10 patients with anterior uveitis with iris atrophy, the VZV genome was detected. When using multiplex PCR, EBV-DNA was detected in 19 of 111 samples (17%). However, real-time PCR analysis of EBV-DNA indicated that there were only six of the 19 samples that had significantly high copy numbers. The cytomegalovirus (CMV) genome was detected in three patients with anterior uveitis of immunocompetent patients and in one immunocompromised CMV retinitis patient. In addition, one patient with severe unilateral panuveitis had a high copy number of HHV6-DNA. There was no HHV7- or HHV8-DNA detected in any of the samples. CONCLUSIONS A qualitative multiplex PCR is useful in the screening of viral infections. However, the clinical relevance of the virus infection needs to be evaluated by quantitative real-time PCR.
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Affiliation(s)
- S Sugita
- Department of Ophthalmology & Visual Science, Medical Research Institute, Tokyo Medical and Dental University, Tokyo, Japan
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Kido S, Sugita S, Horie S, Miyanaga M, Miyata K, Shimizu N, Morio T, Mochizuki M. Association of varicella zoster virus load in the aqueous humor with clinical manifestations of anterior uveitis in herpes zoster ophthalmicus and zoster sine herpete. Br J Ophthalmol 2008; 92:505-8. [PMID: 18245272 DOI: 10.1136/bjo.2007.125773] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM To investigative whether clinical manifestations of anterior uveitis are associated with the viral load of varicella zoster virus (VZV) in the aqueous humor in patients with herpes zoster ophthalmicus (HZO) and zoster sine herpete (ZSH). METHODS After informed consent was given, an aliquot of aqueous humor was collected from patients with VZV anterior uveitis (n = 8). Genomic DNA of the human herpes viruses was measured in the aqueous humor by two PCR assays: a qualitative multiplex PCR and a quantitative real-time PCR. RESULTS All patients had unilateral acute anterior uveitis with high intraocular pressure, mutton fat keratic precipitates with some pigmentation, and trabecular meshwork pigmentation. Multiplex PCR demonstrated VZV genomic DNA in all of the samples, but not in other human herpes virus samples (human simplex virus types 1 and 2, Epstein-Barr virus, cytomegalovirus and human herpes virus types 6, 7 and 8). Real-time PCR revealed a high copy number of VZV DNA in the aqueous humor. After the initial onset of anterior uveitis, iris atrophy and distorted pupil with paralytic mydriasis developed. The intensity of iris atrophy and pupil distortion, but not ocular hypertension, correlated with the viral load of VZV in the aqueous humor. CONCLUSION VZV viral load in the aqueous humor correlated significantly with damage to the iris (iris atrophy and pupil distortion) in patients with HZO and ZSH.
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Affiliation(s)
- S Kido
- Department of Ophthalmology & Visual Science, Tokyo Medical and Dental University Graduate School of Medicine, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8519, Japan
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Nakazawa Y, Suzuki M, Manabe N, Yamada T, Kihara-Negishi F, Sakurai T, Tenen DG, Iwama A, Mochizuki M, Oikawa T. Cooperative interaction between ETS1 and GFI1 transcription factors in the repression of Bax gene expression. Oncogene 2007; 26:3541-50. [PMID: 17213822 DOI: 10.1038/sj.onc.1210140] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The proto-oncoproteins ETS1 and growth factor independent-1 (GFI1) are implicated in cell growth and differentiation in various types of cells, and their deregulated expression is involved in malignant transformation. Here, we report that ETS1 and GFI1 interact and affect gene expression through their cross-talk. Co-immunoprecipitation analyses and glutathione-S-transferase pull-down assays revealed that ETS1 bound directly to GFI1 via its Ets domain, and GFI1 bound to ETS1 via its zinc-finger domain. Luciferase (Luc) assays using artificial reporters showed that GFI1 repressed ETS1-mediated transcriptional activation and ETS1 repressed GFI1-mediated transcriptional activation, in a dose-dependent manner. However, in the Bax promoter where the Ets- and Gfi-binding sites (EBS and GBS) are adjacent, ETS1 and GFI1 cooperatively reduced activation. Site-directed mutagenesis on the EBS and GBS of the Bax promoter showed that both binding sites were necessary for full repression. Chromatin immunoprecipitation analyses confirmed that an ETS1-GFI1 complex formed on the Bax promoter even when either EBS or GBS was mutated. Introduction of small interfering RNA against ETS1 and/or GFI1 enhanced endogenous Bax gene expression. Our results suggest that the interaction between ETS1 and GFI1 facilitates their binding to specific sites on the Bax promoter and represses Bax expression in vivo.
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Affiliation(s)
- Y Nakazawa
- Department of Cell Genetics, Sasaki Institute, Tokyo, Japan
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Mochizuki M, Ouchi A, Kawakami K, Ishida T, Li TC, Takeda N, Ikeda H, Tsunemitsu H. Epidemiological study of hepatitis E virus infection of dogs and cats in Japan. Vet Rec 2006; 159:853-4. [PMID: 17172482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Affiliation(s)
- M Mochizuki
- Laboratory of Clinical Microbiology, Kyoritsu Seiyaku Corporation, 1-12-4 Kudankita, Chiyoda-ku, Tokyo 102-0073, Japan
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Ochi H, Yanagi T, Nakajo M, Takemiya A, Mochizuki M, Oshima H, Watanabe W, Mishina T, Nakamura H. 581 POSTER Discovery of a novel anti-tumor agent targeting NF-kB pathway. EJC Suppl 2006. [DOI: 10.1016/s1359-6349(06)70586-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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Sugita S, Takase H, Yoshida T, Sugamoto Y, Watanabe T, Mochizuki M. Intraocular soluble IL-2 receptor alpha in a patient with adult T cell leukaemia with intraocular invasion. Br J Ophthalmol 2006; 90:1204-6. [PMID: 16929066 PMCID: PMC1857395 DOI: 10.1136/bjo.2006.092809] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Uyama R, Nakagawa T, Hong SH, Mochizuki M, Nishimura R, Sasaki N. Establishment of four pairs of canine mammary tumour cell lines derived from primary and metastatic origin and their E-cadherin expression. Vet Comp Oncol 2006; 4:104-13. [DOI: 10.1111/j.1476-5810.2006.00098.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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