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Nakahata N, Asano M, Abe N, Ejiri H, Ota H, Suzuki S, Sato A, Tazaki R, Nagamine N, Takahashi C, Yamaya Y, Iwadate M, Matsuzuka T, Ohira T, Yasumura S, Suzuki S, Furuya F, Shimura H, Suzuki S, Yokoya S, Ohto H, Kamiya K. Prevalence of thyroid diffuse goiter and its association with body mass index and the presence of cysts and nodules in children and adolescents: the Fukushima Health Management Survey. Endocr J 2024; 71:383-393. [PMID: 38369332 DOI: 10.1507/endocrj.ej23-0609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/20/2024] Open
Abstract
The main cause of diffuse thyroid goiter is autoimmune chronic thyroiditis, otherwise known as Hashimoto's thyroiditis. Thyroid hormones play pivotal roles in growth and development during childhood. However, the prevalence of diffuse goiter and the relationships between diffuse goiter, thyroid volume, cysts and nodules, and anthropometric measurements in children are not well known. Among 789,459 participants who participated in thyroid ultrasound examinations, 320,206 participants (male: 161,728; female: 158,478) aged 1-23 years were analyzed. Logistic regression analyses were conducted to calculate the odds ratios of the standard deviation score of body mass index (BMI-SDS), the SDS of bilateral width multiplied thickness area (BWTAR-SDS) as a provisional determination of thyroid volume, and the presence of nodules or cysts for positive diffuse goiter compared with negative diffuse goiter after correction for sex and age. The prevalence of diffuse goiter increased in a female-dominant manner with aging. Compared with the absence of diffuse goiter, the age- and sex-adjusted odds ratios (95% confidence intervals) for BMI-SDS (1 SD), BWTAR-SDS (1 SD), cysts, and nodules were 1.24 (1.21-1.27), 3.21 (3.13-3.29), 0.53 (0.50-0.58), and 1.38 (1.17-1.64), respectively. The odds ratios of nodules for positive diffuse goiter were 4.18 (1.08-16.08), 1.76 (1.01-3.07), 1.80 (1.32-2.45), and 1.34 (1.08-1.67) in the age groups 1-7, 8-11, 12-15, and 16-23 years, respectively. The age-dependent increase in the prevalence of diffuse goiter was independently associated with increased BMI and positive prevalence of nodules in young individuals.
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Affiliation(s)
- Nana Nakahata
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Mahiro Asano
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Norikazu Abe
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Haruka Ejiri
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Hisashi Ota
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Satoshi Suzuki
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Thyroid and Endocrinology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Ayako Sato
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Rina Tazaki
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Natsuki Nagamine
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Chisato Takahashi
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Laboratory Medicine, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Yukie Yamaya
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Manabu Iwadate
- Department of Surgery, Minamisoma Municipal General Hospital, Fukushima 975-0033, Japan
| | - Takashi Matsuzuka
- Department of Head and Neck Surgery and Otolaryngology, Asahi University Hospital, Gifu 500-8856, Japan
| | - Tetsuya Ohira
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Epidemiology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Seiji Yasumura
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Public Health, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Satoru Suzuki
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Thyroid and Endocrine Center, Fukushima Global Medical Science Center, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Fumihiko Furuya
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Thyroid and Endocrinology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Hiroki Shimura
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
- Department of Laboratory Medicine, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Shinichi Suzuki
- Department of Thyroid Therapeutic Surgery, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Susumu Yokoya
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Hitoshi Ohto
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
| | - Kenji Kamiya
- Radiation Medical Science Center for the Fukushima Health Management Survey, Fukushima Medical University, Fukushima 960-1295, Japan
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Maekawa K, Sawa R, Matsui M, Konda T, Kubota Y, Matsuo A, Maeda A, Takahashi C, Tanimoto T, Nakagawa Y, Yoneda S, Mori Y, Suzuki S. Quality Evaluation of Gentamicin Sulfate Reference Standards in Japanese Pharmacopoeia Using Hydrophilic Interaction Chromatography Combined With Tandem Mass Spectrometry. J AOAC Int 2024; 107:234-241. [PMID: 38070143 DOI: 10.1093/jaoacint/qsad135] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 11/11/2023] [Accepted: 12/03/2023] [Indexed: 03/03/2024]
Abstract
BACKGROUND Through the recent development of analytical technology, antibiotics quantification in the Japanese Pharmacopoeia (JP) has changed from traditional microbiological assays to physicochemical methods with high specificity and precision. However, for several multicomponent antibiotics without typical UV absorption, potency cannot be directly determined using instrumental methods such as high-performance liquid chromatography; therefore, traditional microbiological assays are still used. Gentamicin sulfate (GmS), which consists of three major components, C1, C1a, and C2, is such a typical antibiotic, and its antimicrobial potency continues to be assayed using microbiological methods in JP monographs. Introduction of a physicochemical assay for GmS is needed to help ensure its quality and quantity. OBJECTIVE This study aimed to develop quality control measures for GmS that could be complementary to quantitative assays and purity tests specified in the JP. METHODS For each gentamicin C component (C1, C2, and C1a), theoretical potencies were determined based on the quantitative relationship between purity and potency, as measured by quantitative 1H NMR and microbiological assays, respectively. Two lots of the JP reference standard (RS) were used as test samples, with the contents of each component and impurity (sisomicin and garamine) being determined using hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS). RESULTS The ratios of theoretical potency for C1, C2, and C1a were 1.00, 1.21, and 1.80, respectively. The potencies of the GmS JP RSs, which were estimated based on the contents and theoretical potency of each C component, corresponded well with those determined through microbiological assays. Marked differences in impurities (%) between the two RS lots were highlighted by quantifying sisomicin and garamine. CONCLUSIONS The developed analytical procedure enabled the characterization of two different JP RSs in terms of content ratio, potencies, and impurities. HIGHLIGHTS Novel analytical procedures useful for routine quality control of GmS were developed using HILIC-MS/MS.
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Affiliation(s)
- Keiko Maekawa
- Doshisha Women's College of Liberal Arts, Faculty of Pharmaceutical Sciences, Department of Analytical Chemistry, 97-1 Minamihokodate Kodo Kyotanabe, Kyoto 610-0395, Japan
| | - Ryuichi Sawa
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23, Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Mari Matsui
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo 189-0002, Japan
| | - Toshifumi Konda
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo 189-0002, Japan
| | - Yumiko Kubota
- Institute of Microbial Chemistry (BIKAKEN), 3-14-23, Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan
| | - Ayaka Matsuo
- Doshisha Women's College of Liberal Arts, Faculty of Pharmaceutical Sciences, Department of Analytical Chemistry, 97-1 Minamihokodate Kodo Kyotanabe, Kyoto 610-0395, Japan
| | - Akiho Maeda
- Doshisha Women's College of Liberal Arts, Faculty of Pharmaceutical Sciences, Department of Analytical Chemistry, 97-1 Minamihokodate Kodo Kyotanabe, Kyoto 610-0395, Japan
| | - Chisato Takahashi
- Doshisha Women's College of Liberal Arts, Faculty of Pharmaceutical Sciences, Department of Analytical Chemistry, 97-1 Minamihokodate Kodo Kyotanabe, Kyoto 610-0395, Japan
| | - Tsuyoshi Tanimoto
- Pharmaceutical Reference Standards Center, Pharmaceutical and Medical Device Regulatory Science Society of Japan, Osaka 541-0046, Japan
| | - Yukari Nakagawa
- Pharmaceutical Reference Standards Center, Pharmaceutical and Medical Device Regulatory Science Society of Japan, Osaka 541-0046, Japan
| | - Sachiyo Yoneda
- Pharmaceutical Reference Standards Center, Pharmaceutical and Medical Device Regulatory Science Society of Japan, Osaka 541-0046, Japan
| | - Yuri Mori
- Pharmaceutical Reference Standards Center, Pharmaceutical and Medical Device Regulatory Science Society of Japan, Osaka 541-0046, Japan
| | - Satowa Suzuki
- Antimicrobial Resistance Research Center, National Institute of Infectious Diseases, Tokyo 189-0002, Japan
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Takahashi C, Oishi M, Iwata Y, Maekawa K, Matsumura T. Impact of the TRPV2 Inhibitor on Advanced Heart Failure in Patients with Muscular Dystrophy: Exploratory Study of Biomarkers Related to the Efficacy of Tranilast. Int J Mol Sci 2023; 24:ijms24032167. [PMID: 36768491 PMCID: PMC9917168 DOI: 10.3390/ijms24032167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 01/16/2023] [Accepted: 01/20/2023] [Indexed: 01/25/2023] Open
Abstract
Cardiomyopathy is the leading cause of death in patients with muscular dystrophy (MD). Tranilast, a widely used anti-allergic drug, has displayed inhibitory activity against the transient receptor potential cation channel subfamily V member 2 and improved cardiac function in MD patients. To identify urinary biomarkers that assess improved cardiac function after tranilast administration, we performed a urinary metabolomic study focused on oxidative fatty acids. Accompanying the clinical trial of tranilast, urine specimens were collected over 24 weeks from MD patients with advanced heart failure. Urinary levels of tetranor-PGDM (tetranor-prostaglandin D metabolite), a metabolite of prostaglandin D2, significantly decreased 12 weeks after tranilast administration and were correlated with BNP. These results suggest that prostaglandin-mediated inflammation, which increases with the pathological progression of heart failure in MD patients, was attenuated. Urinary prostaglandin E3 (PGE3) levels significantly increased 4 weeks after tranilast administration. There were positive correlations between the urinary levels of PGE3 and 8-hydroxy-2'-deoxyguanosine, an oxidative stress marker. High PGE3 levels may have a protective effect against cardiomyopathy in MD patients with high oxidative stress. Although further validation studies are necessary, urinary tetranor-PGDM and PGE3 levels may help the current understanding of the extent of advanced heart failure in patients with MD after tranilast administration.
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Affiliation(s)
- Chisato Takahashi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe 610-0395, Kyoto, Japan
| | - Mariko Oishi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe 610-0395, Kyoto, Japan
| | - Yuko Iwata
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, 6-1 Kishibe-Shimmachi, Suita 564-8565, Osaka, Japan
| | - Keiko Maekawa
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyotanabe 610-0395, Kyoto, Japan
- Correspondence: (K.M.); (T.M.)
| | - Tsuyoshi Matsumura
- Department of Neurology, National Hospital Organization Osaka Toneyama Medical Center, 5-1-1 Toneyama, Toyonaka 560-8551, Osaka, Japan
- Correspondence: (K.M.); (T.M.)
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Ejiri H, Asano M, Nakahata N, Suzuki S, Sato A, Nagamine N, Takahashi C, Yamaya Y, Iwadate M, Matsuzuka T, Ohira T, Yasumura S, Suzuki S, Furuya F, Shimura H, Suzuki S, Yokoya S, Ohto H, Kamiya K. Ultrasonography-based reference values for the cross-sectional area of the thyroid gland in children and adolescents: The Fukushima Health Management Survey. Clin Pediatr Endocrinol 2023; 32:52-57. [PMID: 36761492 PMCID: PMC9887296 DOI: 10.1297/cpe.2022-0057] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/19/2022] [Indexed: 11/06/2022] Open
Abstract
We previously described the thyroid volume, which was calculated by measuring the thyroid width, thickness, and longitudinal length using ultrasonography, in children and adolescents. We have proposed a simplified method for quantitatively assessing the thyroid size, to overcome the inaccuracy and challenges in measuring the longitudinal length of the thyroid. Based on measurements of 317,847 (girls: 156,913, boys: 160,934) children and adolescents, we calculated sex-specific means and standard deviations of thyroid width and thickness, and of the cross-sectional area computed by multiplying them, for every age and 0.1 m2 of body surface area, after ensuring normal distribution with Box-Cox transformation. Multivariate regression analysis revealed that female sex, age, and body surface area were independently associated with areas of each thyroid lobe. Our novel method may be useful in quantitatively assessing the thyroid size, and appropriately diagnosing pathological conditions, such as hypoplasia, atrophy, and enlargement of the thyroid gland, in children and adolescents.
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Affiliation(s)
- Haruka Ejiri
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Mahiro Asano
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Nana Nakahata
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Satoshi Suzuki
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Thyroid and Endocrinology, Fukushima Medical
University School of Medicine, Fukushima, Japan
| | - Ayako Sato
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Natsuki Nagamine
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Chisato Takahashi
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Laboratory Medicine, Fukushima Medical
University School of Medicine, Fukushima, Japan
| | - Yukie Yamaya
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Manabu Iwadate
- Department of Surgery, Minamisoma Municipal General Hospital,
Fukushima, Japan
| | - Takashi Matsuzuka
- Department of Head and Neck Surgery and Otolaryngology, Asahi
University Hospital, Gifu, Japan
| | - Tetsuya Ohira
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Epidemiology, Fukushima Medical University
School of Medicine, Fukushima, Japan
| | - Seiji Yasumura
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Public Health, Fukushima Medical University
School of Medicine, Fukushima, Japan
| | - Satoru Suzuki
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Thyroid and Endocrinology, Division of Internal
Medicine, Fukushima Medical University Hospital, Fukushima, Japan
| | - Fumihiko Furuya
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Thyroid and Endocrinology, Fukushima Medical
University School of Medicine, Fukushima, Japan
| | - Hiroki Shimura
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Department of Laboratory Medicine, Fukushima Medical
University School of Medicine, Fukushima, Japan
| | - Shinichi Suzuki
- Department of Thyroid Therapeutic Surgery, Fukushima Medical
University, Fukushima, Japan
| | - Susumu Yokoya
- Thyroid and Endocrine Center, Fukushima Global Medical
Science Center, Fukushima Medical University, Fukushima, Japan
| | - Hitoshi Ohto
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan
| | - Kenji Kamiya
- Radiation Medical Science Center for the Fukushima Health
Management Survey, Fukushima Medical University, Fukushima, Japan,Research Institute for Radiation Biology and Medicine,
Hiroshima University, Hiroshima, Japan
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Rahman MS, Yoshida N, Hanafusa M, Matsuo A, Zhu S, Stub Y, Takahashi C, Tsuboi H, Matsushita R, Maekawa K, Kimura K. Screening and quantification of undeclared PGF 2α analogs in eyelash-enhancing cosmetic serums using LC-MS/MS. J Pharm Biomed Anal 2022; 219:114940. [PMID: 35882176 DOI: 10.1016/j.jpba.2022.114940] [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: 05/09/2022] [Revised: 07/09/2022] [Accepted: 07/11/2022] [Indexed: 11/29/2022]
Abstract
In recent years, cosmetics deemed equivalent to pharmaceutical products containing prostaglandin F2α (PGF2α) analogs have been distributed overseas in the form of eyelash serums that can be purchased via the internet. The purpose of this study was to investigate the presence or absence of PGF2α analogs in eyelash serums procured in Japan via the internet to elucidate the actual composition. A liquid chromatography-tandem mass spectrometry (LC-MS/MS) measurement system was developed for the determination of 14 PGF2α analogs in cosmetic serums. In total, 64 eyelash serum samples were purchased from 34 websites. After pretreatment, eyelash serum samples were screened for PGF2α analogs using the LC-MS/MS system. Products containing PGF2α analogs were subjected to quantification of these compounds. Of the 64 products, four were found to contain bimatoprost, among which, three did not indicate their contents on their package labels. In contrast, no samples were found to contain latanoprost, travoprost, or tafluprost, which are prescribed for glaucoma treatment. Additionally, eight products contained other PGF2α analogs, which have not been used as pharmaceuticals. The ease of access to cosmetic serums containing PGF2α analogs via online purchases presents a risk of serious side effects, particularly when consumers are not informed of their contents on the packages. This issue requires serious consideration to avoid the incorporation of pharmaceutical substances into cosmetic products.
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Affiliation(s)
- Mohammad Sofiqur Rahman
- Medi-Quality Security Institute (MQS), Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan; Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan.
| | - Naoko Yoshida
- AI Hospital/Macro Signal Dynamics Research and Development Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan; Medicine Security Workshop, Venture Business Laboratory 4F, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Miho Hanafusa
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
| | - Ayaka Matsuo
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
| | - Shu Zhu
- Medi-Quality Security Institute (MQS), Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Yukiko Stub
- Department of Hospital Pharmacy, University Hospital, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Chisato Takahashi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan
| | - Hirohito Tsuboi
- Department of Clinical Pharmacy and Healthcare Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Ryo Matsushita
- Department of Clinical Pharmacy and Healthcare Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
| | - Keiko Maekawa
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women's College of Liberal Arts, Kyotanabe, Kyoto 610-0395, Japan.
| | - Kazuko Kimura
- Medi-Quality Security Institute (MQS), Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan; Medicine Security Workshop, Venture Business Laboratory 4F, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan
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Oda Y, Takahashi C, Harada S, Nakamura S, Sun D, Kiso K, Urata Y, Miyachi H, Fujiyoshi Y, Honigmann A, Uchida S, Ishihama Y, Toyoshima F. Discovery of anti-inflammatory physiological peptides that promote tissue repair by reinforcing epithelial barrier formation. Sci Adv 2021; 7:eabj6895. [PMID: 34788088 PMCID: PMC8597994 DOI: 10.1126/sciadv.abj6895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 09/28/2021] [Indexed: 05/10/2023]
Abstract
Epithelial barriers that prevent dehydration and pathogen invasion are established by tight junctions (TJs), and their disruption leads to various inflammatory diseases and tissue destruction. However, a therapeutic strategy to overcome TJ disruption in diseases has not been established because of the lack of clinically applicable TJ-inducing molecules. Here, we found TJ-inducing peptides (JIPs) in mice and humans that corresponded to 35 to 42 residue peptides of the C terminus of alpha 1-antitrypsin (A1AT), an acute-phase anti-inflammatory protein. JIPs were inserted into the plasma membrane of epithelial cells, which promoted TJ formation by directly activating the heterotrimeric G protein G13. In a mouse intestinal epithelial injury model established by dextran sodium sulfate, mouse or human JIP administration restored TJ integrity and strongly prevented colitis. Our study has revealed TJ-inducing anti-inflammatory physiological peptides that play a critical role in tissue repair and proposes a previously unidentified therapeutic strategy for TJ-disrupted diseases.
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Affiliation(s)
- Yukako Oda
- Department of Biosystems Science, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Chisato Takahashi
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Doshisha Women’s College of Liberal Arts, Kyoto 610-0395, Japan
| | - Shota Harada
- Laboratory of Human Interface, Graduate School of Systems Life Sciences, Kyushu University, Fukuoka 819-0395, Japan
| | - Shun Nakamura
- Cellular and Structural Physiology Laboratory, Advanced Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
- CeSPIA Inc., Tokyo 100-0004, Japan
| | - Daxiao Sun
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01309, Germany
| | - Kazumi Kiso
- Department of Biosystems Science, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Yuko Urata
- Department of Biosystems Science, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Hitoshi Miyachi
- Reproductive Engineering Team, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Yoshinori Fujiyoshi
- Cellular and Structural Physiology Laboratory, Advanced Research Institute, Tokyo Medical and Dental University, Tokyo 113-8510, Japan
- CeSPIA Inc., Tokyo 100-0004, Japan
| | - Alf Honigmann
- Max Planck Institute of Molecular Cell Biology and Genetics, Dresden 01309, Germany
| | - Seiichi Uchida
- Laboratory of Human Interface, Graduate School of Systems Life Sciences, Kyushu University, Fukuoka 819-0395, Japan
| | - Yasushi Ishihama
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Fumiko Toyoshima
- Department of Biosystems Science, Institute for Frontier Life and Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
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Takahashi C, Sato M, Sato C. Biofilm formation of Staphylococcus epidermidis imaged using atmospheric scanning electron microscopy. Anal Bioanal Chem 2021; 413:7549-7558. [PMID: 34671824 DOI: 10.1007/s00216-021-03720-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 09/01/2021] [Accepted: 10/05/2021] [Indexed: 11/30/2022]
Abstract
Staphylococcus epidermidis are gram-positive bacteria that form a biofilm around implanted devices and develop an infection into a chronic state. Recently, it has been revealed that microvesicles have important roles in biofilm formation and intercellular communication among bacteria. However, biofilm formation of Staphylococcus epidermidis, and its relation to microvesicle secretion, is poorly understood because of the difficulty required to preserve the delicate water-rich morphology of biofilm for high-resolution observations. Here, we successfully imaged the microvesicles secreted from Staphylococcus epidermidis and the subsequent process of their integration into biofilm using liquid-phase imaging using atmospheric scanning electron microscopy (ASEM). In the biofilm, cells were connected by nanotube-like structures attached by microvesicles, and surrounded by extracellular polymeric substances. Cells cultured in the ASEM specimen holder were aldehyde-fixed and stained using positively charged nanogold labelling and/or using National Center for Microscopy and Imaging Research method. The samples immersed in aqueous radical scavenger glucose buffer were imaged by the inverted SEM of ASEM. Information regarding the morphologies of microvesicles, nanotube-like fibrils, and biofilm formed by Staphylococcus epidermidis is expected to be useful to elucidate the biological mechanism of biofilm formation and to develop a medicine against biofilms and their associated infections.
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Affiliation(s)
- Chisato Takahashi
- Department of Materials and Chemistry, National Institute of Advanced Industrial Science and Technology, 2266-98, Anagahora, Shimoshidami, Moriyama-ku, Nagoya, Aichi, 463-8560, Japan.
| | - Mari Sato
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8568, Japan
| | - Chikara Sato
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, Higashi 1-1-1, Tsukuba, Ibaraki, 305-8568, Japan
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Shimizu H, Takahashi C, Koike M, Fukui K, Nakashima K. How do Changes in One's Self‐Esteem Affect the Self‐Esteem of Others? Jpn Psychol Res 2021. [DOI: 10.1111/jpr.12350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Takahashi C, Yamada T, Yagi S, Murai T, Muto S. Preparation of silver-decorated Soluplus® nanoparticles and antibacterial activity towards S. epidermidis biofilms as characterized by STEM-CL spectroscopy. Mater Sci Eng C Mater Biol Appl 2020; 121:111718. [PMID: 33579506 DOI: 10.1016/j.msec.2020.111718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 11/03/2020] [Accepted: 11/06/2020] [Indexed: 01/07/2023]
Abstract
Biofilm infections present a serious problem because antibacterial drugs are not effective against mature biofilms or biofilms formed by drug-resistant bacteria. To address this issue, we developed a drug delivery system based on metal-decorated polymeric particles. Polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (Soluplus®) is an amphiphilic polymer used in biomedical formulations, while silver nanoparticles are widely acknowledged to have high antibacterial activity. We prepared silver-decorated Soluplus® micelle nanoparticles with high antibacterial activity using the emulsion solvent diffusion method. Decoration of Soluplus® micelles with silver nanoparticles was found to increase their antibacterial activity. Scanning transmission electron microscopy-cathodoluminescence (STEM-CL) spectroscopy allows imaging of the spatial distribution of labeled targets and the chemical identification of materials. However, STEM-CL spectroscopy of fragile polymer materials is challenging. We optimized the STEM-CL spectroscopy technique to determine the distribution of silver nanoparticles in Soluplus® micelles. Additionally, the surface plasmon properties of the silver nanoparticles were successfully characterized without deactivation. The developed silver-decorated Soluplus® nanoparticles were effective against biofilm infections and have the potential to be applied for other biofilm-related diseases. Additionally, the optimized STEM-CL spectroscopy technique is expected to contribute to the analysis and imaging of fragile polymer materials, as well as other soft materials such as cells and tissues.
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Affiliation(s)
- Chisato Takahashi
- Magnetic Powder Metallurgy Research Center, National Institute of Advanced Industrial Science and Technology, 2266-98, Anagahora, Shimoshidami, Moriyama-ku, Nagoya, Aichi 463-8560, Japan; Laboratoire Matériaux et Phénomènes Quantiques, Université de Paris, Bâtiment Condorcet, 10 rue Alice Domon et Léonie Duquet, Case courrier 7021, 75205 Paris CEDEX 13, France.
| | - Tomomi Yamada
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
| | - Shinya Yagi
- Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
| | - Takaaki Murai
- Aichi Synchrotron Radiation Center, 250-3 Minamiyamaguchi-cho, Seto, Aichi 489-0965, Japan
| | - Shunsuke Muto
- Institute of Materials and Systems for Sustainability, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, Aichi 464-8601, Japan
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Takahashi C, Kozawa M. The effect on preventing influenza infection with partially hydrolyzed guar gum. Clin Nutr ESPEN 2020. [DOI: 10.1016/j.clnesp.2020.09.129] [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]
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11
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Honda M, Kimura Y, Isoyama T, Sakaridani N, Sejima T, Ono K, Takahashi C, Komi T, Matsuoka H, Takenaka A. Efficacy and safety of combination treatment with tadalafil and mirabegron for persistent storage symptoms despite tadalafil treatment in patients with benign prostatic hyperplasia. EUR UROL SUPPL 2020. [DOI: 10.1016/s2666-1683(20)32991-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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12
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Kondo Y, Kaneko Y, Saito S, Ohta Y, Sakata K, Inoue Y, Takahashi C, Hiramoto K, Inamo J, Takeuchi T. SAT0113 DISCORDANCE OF CLINICAL REMISSION AND IMAGING REMISSION BY ULTRASONOGRAPHY IN PATIENTS WITH RHEUMATOID ARTHRITIS WITH BIOLOGIC AGENTS. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.5048] [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:Residual synovitis can be detected by sensitive modalities such as ultrasonography in patients with rheumatoid arthritis in clinical remission. On the other hand, a previous study has shown that ultrasound-guided treatment provides modest benefit compared to a conventional strategy aiming clinical remission in early patients. It is still unclear how discordant clinical remission is from imaging remission by ultrasonography in patients treated with biologic agentsObjectives:To clarify the discordance between clinical remission and imaging remission in patients with rheumatoid arthritis treated with biologic agents.Methods:Patients with rheumatoid arthritis who were treated with biologic agents and in clinical remission defined as disease activity score for 28 joints (DAS28)<2.6 were enrolled. All patients were performed comprehensive ultrasound examination of 44 joints as well as physical examinations. Ultrasound images of gray scale (GS) and power doppler (PD) were evaluated with a semi-quantitative score of 0-3. Imaging remission with ultrasound was defined as no PD signal detected in any joints. Clinical information was collected from their medical charts.Results:A total of 41 patients were enrolled with 22 patients treated with tumor necrosis factor (TNF)-α inhibitors and 19 with interleukin (IL)-6 inhibitors. The mean age, female ratio, the mean disease duration, and the mean duration of clinical remission were 60 years old, 87%, 5.1 years and 11.5 years. The imaging remission by ultrasonography was observed only in 51.2 %. When patients were divided according to biologic agents, baseline characteristics including median age, disease duration and clinically remission duration were comparable between both groups, while the rates of seropositivity and the stage of radiological progression was higher in IL-6 group (seropositivity, p=0.04; radiological progression, p=0.02). The mean DAS28 was 1.93 in the TNFα group and 1.02 in the IL-6 group. The discordance of clinical remission and imaging remission was observed in 28.6% of the TNFα group and 71.4% of the IL-6 group (p=0.03). The residual synovitis scores of GS and PD in 44 joints were significantly lower in the TNFα than the IL-6 group (GS, 1.1±1.8 vs 4.7 ± 4.6, p<0.01; PD, 0.6 ± 1.3 vs 3.3 ± 3.5, p<0.01, respectively). A receiver operating characteristic curve demonstrated an optimal score of DAS28 that discriminated imaging remission as 1.89 in the TNFα group and 1.25 in the IL-6 group.Conclusion:Our results showed that there was substantial discordance between clinical remission and imaging remission, especially in the patients treated with IL-6 inhibitors. In patients treated with biologic agents, clinical remission should be assessed more stringently than the usual 2.6, and ulltrasound-guided management may be useful.References:[1]Smolen JS, et al. Ann Rheum Dis 2020;0:1–15.[2]Iwamoto T, et al. Arthritis Care Res (Hoboken). 2014;66(10):1576-81[3]Tanaka Y. Ann Rheum Dis 2010;69:1286 –91[4]Kaneko Y, et al. Ann Rheum Dis 2018;77:1268–1275[5]Brown AK, et al. Arthritis Rheum 2008;58: 2958 – 67.Acknowledgments:We would like to thank Harumi Kondo for their assistance.Disclosure of Interests:Yasushi Kondo: None declared, Yuko Kaneko Speakers bureau: Dr. Kaneko reports personal fees from AbbVie, personal fees from Astellas, personal fees from Ayumi, personal fees from Bristol-Myers Squibb, personal fees from Chugai, personal fees from Eisai, personal fees from Eli Lilly, personal fees from Hisamitsu, personal fees from Jansen, personal fees from Kissei, personal fees from Pfizer, personal fees from Sanofi, personal fees from Takeda, personal fees from Tanabe-Mitsubishi, personal fees from UCB, Shuntaro Saito: None declared, Yuichiro Ohta: None declared, Komei Sakata: None declared, Yumiko Inoue: None declared, Chihiro Takahashi: None declared, Kazuoto Hiramoto: None declared, Jun Inamo: None declared, Tsutomu Takeuchi Grant/research support from: Eisai Co., Ltd, Astellas Pharma Inc., AbbVie GK, Asahi Kasei Pharma Corporation, Nippon Kayaku Co., Ltd, Takeda Pharmaceutical Company Ltd, UCB Pharma, Shionogi & Co., Ltd., Mitsubishi-Tanabe Pharma Corp., Daiichi Sankyo Co., Ltd., Chugai Pharmaceutical Co. Ltd., Consultant of: Chugai Pharmaceutical Co Ltd, Astellas Pharma Inc., Eli Lilly Japan KK, Speakers bureau: AbbVie GK, Eisai Co., Ltd, Mitsubishi-Tanabe Pharma Corporation, Chugai Pharmaceutical Co Ltd, Bristol-Myers Squibb Company, AYUMI Pharmaceutical Corp., Eisai Co., Ltd, Daiichi Sankyo Co., Ltd., Gilead Sciences, Inc., Novartis Pharma K.K., Pfizer Japan Inc., Sanofi K.K., Dainippon Sumitomo Co., Ltd.
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Danilova MV, Takahashi C, Mollon JD. How does the human visual system compare the speeds of spatially separated objects? PLoS One 2020; 15:e0231959. [PMID: 32352993 PMCID: PMC7192430 DOI: 10.1371/journal.pone.0231959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [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] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Accepted: 04/04/2020] [Indexed: 11/19/2022] Open
Abstract
We measured psychophysical thresholds for discriminating the speeds of two arrays of moving dots. The arrays could be juxtaposed or could be spatially separated by up to 10 degrees of visual angle, eccentricity being held constant. We found that the precision of the judgments varied little with separation. Moreover, the function relating threshold to separation was similar whether the arrays moved in the same, in opposite or in orthogonal directions. And there was no significant difference in threshold whether the two stimuli were initially presented to the same cerebral hemisphere or to opposite ones. How are human observers able to compare stimuli that fall at well separated positions in the visual field? We consider two classes of explanation: (i) Observers' judgments might be based directly on the signals of dedicated 'comparator neurons', i.e. neurons drawing inputs of opposite sign from local regions of the visual field. (ii) Signals about local features might be transmitted to the site of comparison by a shared 'cerebral bus', where the same physical substrate carries different information from moment to moment. The minimal effects of proximity and direction (which might be expected to influence local detectors of relative motion), and the combinatorial explosion in the number of comparator neurons that would be required by (i), lead us to favor models of type (ii).
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Affiliation(s)
- M. V. Danilova
- Department of Psychology, University of Cambridge, Cambridge, England, United Kingdom
- I. P. Pavlov Institute of Physiology, St. Petersburg, Russian Federation, Giessen, Germany
- * E-mail:
| | - C. Takahashi
- Department of Psychology, University of Cambridge, Cambridge, England, United Kingdom
| | - J. D. Mollon
- Department of Psychology, University of Cambridge, Cambridge, England, United Kingdom
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Thumkeo D, Katsura Y, Nishimura Y, Kanchanawong P, Tohyama K, Ishizaki T, Kitajima S, Takahashi C, Hirata T, Watanabe N, Krummel MF, Narumiya S. mDia1/3-dependent actin polymerization spatiotemporally controls LAT phosphorylation by Zap70 at the immune synapse. Sci Adv 2020; 6:eaay2432. [PMID: 31911947 PMCID: PMC6938706 DOI: 10.1126/sciadv.aay2432] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2019] [Accepted: 10/31/2019] [Indexed: 05/06/2023]
Abstract
The mechanism by which the cytosolic protein Zap70 physically interacts with and phosphorylates its substrate, the transmembrane protein LAT, upon T cell receptor (TCR) stimulation remains largely obscure. In this study, we found that the pharmacological inhibition of formins, a major class of actin nucleators, suppressed LAT phosphorylation by Zap70, despite TCR stimulation-dependent phosphorylation of Zap70 remaining intact. High-resolution imaging and three-dimensional image reconstruction revealed that localization of phosphorylated Zap70 to the immune synapse (IS) and subsequent LAT phosphorylation are critically dependent on formin-mediated actin polymerization. Using knockout mice, we identify mDia1 and mDia3, which are highly expressed in T cells and which localize to the IS upon TCR activation, as the critical formins mediating this process. Our findings therefore describe previously unsuspected roles for mDia1 and mDia3 in the spatiotemporal control of Zap70-dependent LAT phosphorylation at the IS through regulation of filamentous actin, and underscore their physiological importance in TCR signaling.
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Affiliation(s)
- D. Thumkeo
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Department of Pathology, University of California, San Francisco, San Francisco, CA, USA
- Corresponding author. (D.T.); (S.N.)
| | - Y. Katsura
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Department of Pharmacology, Kyoto University Faculty of Medicine, Kyoto, Japan
| | - Y. Nishimura
- Mechanobiology Institute, National University of Singapore, Singapore, Republic of Singapore
| | - P. Kanchanawong
- Mechanobiology Institute, National University of Singapore, Singapore, Republic of Singapore
- Department of Biomedical Engineering, National University of Singapore, Singapore, Republic of Singapore
| | - K. Tohyama
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Department of Pharmacology, Kyoto University Faculty of Medicine, Kyoto, Japan
| | - T. Ishizaki
- Department of Pharmacology, Oita University Graduate School of Medicine, Oita, Japan
| | - S. Kitajima
- Division of Oncology and Molecular Biology, Cancer Research Institute, Kanazawa University, Ishikawa, Japan
| | - C. Takahashi
- Division of Oncology and Molecular Biology, Cancer Research Institute, Kanazawa University, Ishikawa, Japan
| | - T. Hirata
- Department of Fundamental Biosciences, Shiga University of Medical Science, Shiga, Japan
| | - N. Watanabe
- Department of Pharmacology, Kyoto University Faculty of Medicine, Kyoto, Japan
- Laboratory of Single-Molecule Cell Biology, Kyoto University Graduate School of Biostudies, Kyoto, Japan
| | - M. F. Krummel
- Department of Pathology, University of California, San Francisco, San Francisco, CA, USA
| | - S. Narumiya
- Department of Drug Discovery Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Corresponding author. (D.T.); (S.N.)
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MATSUKI T, Hirose T, Shimada S, Takahashi C, Kinugasa S, Muroya Y, Nakamura H, Tani J, Itoh S, Mori T. SUN-186 IMATINIB ATTENUATES PERYCITE-MYOFIBROBLAST TRANSITION IN RENAL CONGESTION IN RATS. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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Abstract
Anticoagulants have recently been recognised as a cause of acute kidney injury (AKI). We describe the case of a 75-year-old man with IgA vasculitis and atrial fibrillation treated with rivaroxaban, who presented with macroscopic haematuria and an acute decline in renal function. Two months before referral, he noted palpable purpuric lesions and was diagnosed with IgA vasculitis based on skin biopsy findings; the skin lesion disappeared following treatment with a steroid external preparation. Renal biopsy revealed glomerular haemorrhage and red blood cell casts. Although rivaroxaban was withdrawn, his kidney function worsened and he was started on haemodialysis. His renal function did not recover. To the best of our knowledge, this is the first case of direct oral anticoagulant (DOAC)-related AKI in systemic vasculitis. During DOAC therapy, close monitoring of a patient's urinalysis results and their renal function may be required for patients with systemic vasculitis to avoid AKI.
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Affiliation(s)
| | | | | | - Takashi Uzu
- Nephrology and Blood Purification, Nippon Life Hospital, Osaka, Japan
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17
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M. VP, Kumar MP, Takahashi C, Kundu S, Narayanan TN, Pattanayak DK. Boron-doped graphene quantum dots: an efficient photoanode for a dye sensitized solar cell. NEW J CHEM 2019. [DOI: 10.1039/c9nj00052f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A cost effective boron doped graphene quantum dot from boron carbide graphene by microwave reactor assisted process that can tune the properties of metal oxides for DSSC application is proposed by D. K. Pattanayak, S. Kundu, T. N. Narayanan and co-workers.
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Affiliation(s)
| | | | - Chisato Takahashi
- National Institute of Advanced Industrial Science and Technology
- Anagahora, Shimoshidami
- Nagoya
- Japan
| | - Subrata Kundu
- CSIR-Central Electrochemical Research Institute
- Karaikudi
- India
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18
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Sugiura T, Takahashi C, Chuma Y, Fukuda M, Yamada M, Yoshida U, Nakao H, Ikeda K, Khan D, Nile AH, Bankaitis VA, Nakano M. Biophysical Parameters of the Sec14 Phospholipid Exchange Cycle. Biophys J 2018; 116:92-103. [PMID: 30580923 DOI: 10.1016/j.bpj.2018.11.3131] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 10/24/2018] [Accepted: 11/28/2018] [Indexed: 12/23/2022] Open
Abstract
Sec14, the major yeast phosphatidylcholine (PC)/phosphatidylinositol (PI) transfer protein (PITP), coordinates PC and PI metabolism to facilitate an appropriate and essential lipid signaling environment for membrane trafficking from trans-Golgi membranes. The Sec14 PI/PC exchange cycle is essential for its essential biological activity, but fundamental aspects of how this PITP executes its lipid transfer cycle remain unknown. To address some of these outstanding issues, we applied time-resolved small-angle neutron scattering for the determination of protein-mediated intervesicular movement of deuterated and hydrogenated phospholipids in vitro. Quantitative analysis by small-angle neutron scattering revealed that Sec14 PI- and PC-exchange activities were sensitive to both the lipid composition and curvature of membranes. Moreover, we report that these two parameters regulate lipid exchange activity via distinct mechanisms. Increased membrane curvature promoted both membrane binding and lipid exchange properties of Sec14, indicating that this PITP preferentially acts on the membrane site with a convexly curved face. This biophysical property likely constitutes part of a mechanism by which spatial specificity of Sec14 function is determined in cells. Finally, wild-type Sec14, but not a mixture of Sec14 proteins specifically deficient in either PC- or PI-binding activity, was able to effect a net transfer of PI or PC down opposing concentration gradients in vitro.
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Affiliation(s)
- Taichi Sugiura
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Chisato Takahashi
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Yusuke Chuma
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Masakazu Fukuda
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Makiko Yamada
- Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Ukyo Yoshida
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Hiroyuki Nakao
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Keisuke Ikeda
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan
| | - Danish Khan
- Departments of Biochemistry and Biophysics, Texas A&M University, College Station, Texas
| | - Aaron H Nile
- Department of Molecular & Cellular Medicine, Texas A&M Health Sciences Center, College Station, Texas
| | - Vytas A Bankaitis
- Departments of Biochemistry and Biophysics, Texas A&M University, College Station, Texas; Department of Molecular & Cellular Medicine, Texas A&M Health Sciences Center, College Station, Texas
| | - Minoru Nakano
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama, Toyama, Japan.
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Takahashi C, Yamamoto H. PB-14A Simple Sample Preparation Technique for Morphological Observation of Wet Inorganic and Biological Materials Using Conductive Materials. Microscopy (Oxf) 2017. [DOI: 10.1093/jmicro/dfx115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Chisato Takahashi
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, Aichi, Japan
| | - Hiromitsu Yamamoto
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, Aichi, Japan
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20
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Ogawa N, Nagase H, Loftsson T, Endo T, Takahashi C, Kawashima Y, Ueda H, Yamamoto H. Crystallographic and theoretical studies of an inclusion complex of β-cyclodextrin with fentanyl. Int J Pharm 2017; 531:588-594. [DOI: 10.1016/j.ijpharm.2017.06.081] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 06/21/2017] [Accepted: 06/24/2017] [Indexed: 10/19/2022]
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Takahashi C, Umemura Y, Naka A, Yamamoto H. SEM imaging of the stimulatory response of RAW264.7 cells against Porphyromonas gingivalis using a simple technique employing new conductive materials. J Biomed Mater Res B Appl Biomater 2017. [PMID: 28636123 DOI: 10.1002/jbm.b.33940] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In the medical biology, it is essential to understand not only biological morphology but also the interaction between biological materials and agents. To study these, electron microscopy (EM) is often utilized. However, sample preparation techniques for EM require a high level of skill and a considerable time. Here, we conducted EM using a simple technique employing a conductive liquid, BEL-1, and compared the results with another simple technique employing an ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF4 ]). BEL-1 was used for sample pretreatment, and the morphologies of the mouse RAW 264.7 cell line, Porphyromonas gingivalis, and the RAW 264.7 cell line were stimulated via co-incubation with P. gingivalis and observed using field emission scanning EM (FE-SEM). In the present study, the inflammation-induced system of P. gingivalis was successfully established. FE-SEM results revealed the fine morphology of the RAW 264.7 cell line and P. gingivalis and confirmed a morphological change in the RAW 264.7 cell line caused by P. gingivalis stimulation. Using the developed sample preparation technique employing BEL-1, high-contrast and high-resolution observations of deformable biological materials were conducted without any difficulty or the necessity for complicated technique. This morphological information and the developed techniques can contribute to reveal the interaction between biological materials and agents and thereby accelerate drug formulation and disease treatment. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1280-1285, 2018.
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Affiliation(s)
- Chisato Takahashi
- School of Pharmacy, Pharmaceutical Engineering, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Yoshiki Umemura
- School of Pharmacy, Pharmaceutical Engineering, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Ayako Naka
- School of Pharmacy, Pharmaceutical Engineering, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Hiromitsu Yamamoto
- School of Pharmacy, Pharmaceutical Engineering, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
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22
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Isobe M, Nagaoka K, Yoshimura Y, Minami T, Akiyama T, Suzuki C, Nishimura S, Nakamura K, Shimizu A, Takahashi C, Toi K, Matsuoka K, Okamura S, Matsushita H, Murakami S. Reheat Mode Discharges in Search of Attainable High Stored Energy and Density Limit of Compact Helical System. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1240] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Minami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Akiyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Suzuki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Toi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Matsuoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Okamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Matsushita
- The Graduate University for Advanced Studies, Toki 509-5292, Japan
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Taguchi M, Shigeyama M, Ito N, Ogawa N, Takahashi C, Murata M, Hanioka N, Yamamoto H, Teramachi H. Preparation and Evaluation of Modified Mohs Paste without Starch. YAKUGAKU ZASSHI 2017; 137:477-484. [PMID: 28381726 DOI: 10.1248/yakushi.16-00248] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Mohs paste is an external preparation containing zinc hydrochloride and zinc oxide starch as the main ingredient, and it is used for the palliative treatment of patients with surgically untreatable malignant tumors. However, it has problems, such as changes in hardness and viscoelasticity with time and liquefaction by exudate. To overcome these problems, we modified the formulation of Mohs paste by excluding starch, which is the cause of physical changes, and investigated the base. In the modified Mohs paste using the macrogol ointment for the base, no marked change with time was noted in the hardness, malleability, or elongation property, and the water-absorbing properties were equivalent to those of Mohs paste immediately after preparation. The hardness did not decrease even after absorbing water. The drug release rate increased 1.5 times with the modified Mohs paste. Based on these findings, the risk of liquefaction-associated damage of the surrounding skin decreased on using the modified Mohs paste, and preparing in advance became possible. These results suggest that the modified Mohs paste using the macrogol ointment for the base exhibits an equivalent effect for control of exudate and a high effect for tissue fixation.
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Affiliation(s)
- Maho Taguchi
- Center for Clinical Pharmacy, Yokohama University of Pharmacy
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24
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Seki T, Mutoh T, Kumazawa R, Saito K, Nakamura Y, Sakamoto M, Watanabe T, Kubo S, Shimozuma T, Yoshimura Y, Igami H, Ohkubo K, Takeiri Y, Oka Y, Tsumori K, Osakabe M, Ikeda K, Nagaoka K, Kaneko O, Miyazawa J, Morita S, Narihara K, Shoji M, Masuzaki S, Goto M, Morisaki T, Peterson BJ, Sato K, Tokuzawa T, Ashikawa N, Nishimura K, Funaba H, Chikaraishi H, Takeuchi N, Notake T, Ogawa H, Torii Y, Shimpo F, Nomura G, Yokota M, Takahashi C, Kato A, Takase Y, Kasahara H, Ichimura M, Higaki H, Zhao YP, Kwak JG, Yamada H, Kawahata K, Ohyabu N, Ida K, Nagayama Y, Noda N, Watari T, Komori A, Sudo S, Motojima O. Study of Long-Pulse Plasma Experiment Using ICRF Heating in LHD. Fusion Science and Technology 2017. [DOI: 10.13182/fst06-a1234] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- T. Seki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - R. Kumazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Saito
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nakamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | - T. Watanabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ohkubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Oka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Tsumori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Osakabe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ikeda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Kaneko
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - J. Miyazawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Morita
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Narihara
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Shoji
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Masuzaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Goto
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Morisaki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - B. J. Peterson
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Sato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Tokuzawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ashikawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Funaba
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Chikaraishi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Takeuchi
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - T. Notake
- Nagoya University, Faculty of Engineering, Nagoya 464-8601, Japan
| | - H. Ogawa
- Graduate University for Advanced Studies, Hayama 240-0162, Japan
| | - Y. Torii
- Kyoto University, Institute of Advanced Energy, Uji 611-0011, Japan
| | - F. Shimpo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - G. Nomura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Yokota
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Kato
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | | | | | - H. Higaki
- University of Tsukuba, Tsukuba, Japan
| | - Y. P. Zhao
- Institute of Plasma Physics, Academia Sinica, Hefei 230031, P.R. China
| | - J. G. Kwak
- Korea Atomic Energy Research Institute, Daejeon 305-600, Korea Rep
| | - H. Yamada
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Kawahata
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Ohyabu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Ida
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y. Nagayama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - N. Noda
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Watari
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Komori
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Sudo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - O. Motojima
- National Institute for Fusion Science, Toki 509-5292, Japan
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25
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Yoshimura Y, Ferrando-Margalet S, Isobe M, Suzuki C, Shimizu A, Akiyama T, Takahashi C, Nagaoka K, Nishimura S, Minami T, Matsuoka K, Okamura S, Igami H, Kubo S, Shimozuma T, Notake T, Mutoh T, Nagasaki K. Experimental Observations of O-X-B Heating of Overdense Plasmas in CHS. Fusion Science and Technology 2017. [DOI: 10.13182/fst07-a1500] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | | | - M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Suzuki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Akiyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Minami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Matsuoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Okamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Notake
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagasaki
- Kyoto University, Institute of Advanced Energy, Uji 611-0011, Japan
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26
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Yoshimura Y, Akiyama T, Isobe M, Shimizu A, Suzuki C, Takahashi C, Nagaoka K, Nishimura S, Minami T, Matsuoka K, Okamura S, Kubo S, Shimozuma T, Igami H, Notake T, Mutoh T. Optimization of Electron Cyclotron Current Drive in the Magnetic Field Configuration of CHS. Fusion Science and Technology 2017. [DOI: 10.13182/fst08-a1652] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Yoshimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Akiyama
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M. Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - A. Shimizu
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Suzuki
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - C. Takahashi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Nagaoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Nishimura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Minami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - K. Matsuoka
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Okamura
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - S. Kubo
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Shimozuma
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - H. Igami
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Notake
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - T. Mutoh
- National Institute for Fusion Science, Toki 509-5292, Japan
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27
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Takahashi C, Ueno K, Aoyama J, Adachi M, Yamamoto H. Imaging of intracellular behavior of polymeric nanoparticles in Staphylococcus epidermidis biofilms by slit-scanning confocal Raman microscopy and scanning electron microscopy with energy-dispersive X-ray spectroscopy. Mater Sci Eng C Mater Biol Appl 2017; 76:1066-1074. [PMID: 28482470 DOI: 10.1016/j.msec.2017.03.132] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 03/10/2017] [Accepted: 03/13/2017] [Indexed: 11/25/2022]
Abstract
In drug delivery systems employing polymeric nanoparticles, accurate delivery of drugs to target sites such as bacterial cells, cell tissues, and organelles is essential. In particular, when designing drug delivery systems for the treatment of the biofilm infections, evaluation of the interaction between polymeric nanoparticles and biofilm or bacterial cells using a simple technique is of significant importance. Here we develop two types of novel techniques for the biological imaging of the intracellular behavior of two types of polymeric nanoparticles, biodegradable chitosan-modified poly (dl-lactide-co-glycolide) (PLGA) nanoparticles and chitosan-modified polyvinyl caprolactam - polyvinyl acetate -polyethylene glycol graft copolymer (Soluplus®, Sol) nanoparticles, within a Staphylococcus epidermidis biofilm. As the first technique, Raman imaging of unstained biological materials using slit-scanning confocal Raman microscopy (unstained Raman imaging) was performed, and as the second, field-emission scanning electron microscopy with energy-dispersive X-ray spectroscopy analysis of biological materials labeled with quantum dots (SEM-QD imaging) was demonstrated. These analyses revealed differing localization of the respective nanoparticles within the biofilm in accordance with the specific interactions of PLGA nanoparticles and Sol nanoparticles with the biofilm. These novel techniques open the door to biological imaging and analyses with high spatial resolution, which will help to understand the efficacy of drug delivery to target materials.
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Affiliation(s)
- Chisato Takahashi
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan.
| | - Kusuo Ueno
- HORIBA, Ltd., Miyanohigashi, Kisshoin, Minami-Ku, Kyoto, Kyoto 601-8510, Japan
| | - Junichi Aoyama
- HORIBA, Ltd., Miyanohigashi, Kisshoin, Minami-Ku, Kyoto, Kyoto 601-8510, Japan
| | - Mariko Adachi
- Nanophoton Corporation, 321 Photonics Center, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan
| | - Hiromitsu Yamamoto
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya, Aichi 464-8650, Japan
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28
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Takahashi C, Matsubara N, Akachi Y, Ogawa N, Kalita G, Asaka T, Tanemura M, Kawashima Y, Yamamoto H. Visualization of silver-decorated poly (DL-lactide-co-glycolide) nanoparticles and their efficacy against Staphylococcus epidermidis. Mater Sci Eng C Mater Biol Appl 2016; 72:143-149. [PMID: 28024570 DOI: 10.1016/j.msec.2016.11.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 10/24/2016] [Accepted: 11/13/2016] [Indexed: 12/30/2022]
Abstract
Understanding of self-protection activity of the bacteria and interaction with drug substances has significant importance for designing of effective drug delivery system for treatment of biofilm infections. Recently silver nanoparticle has attracted attention as antibacterial substance for drug delivery system because of its high antibacterial activity. Here, efflux of silver nanoparticles obtained from within the prepared silver-decorated poly (DL-lactide-co-glycolide) (Ag PLGA) nanoparticles derived from Staphylococcus epidermidis bacterial cell was successfully visualized using scanning transmission electron microscopy (STEM). We also revealed the interaction between prepared Ag PLGA nanoparticles and the bacterial cells at the nanoscale level using field emission scanning electron microscopy and STEM, after a pretreatment process by an ionic liquid. This finding is significant to understand a fundamental function of S. epidermidis bacterial cells, which is not explored previously. The results suggest that Ag PLGA nanoparticles could demonstrate high efficacy against biofilm infections.
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Affiliation(s)
- Chisato Takahashi
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan.
| | - Nobuhiro Matsubara
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
| | - Yuki Akachi
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
| | - Noriko Ogawa
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
| | - Golap Kalita
- Department of Frontier Materials, Nagoya Institute of Technology, Gokisocho, Showa-ku, Nagoya 466-8555, Japan
| | - Toru Asaka
- Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokisocho, Showa-ku, Nagoya 466-8555, Japan
| | - Masaki Tanemura
- Department of Frontier Materials, Nagoya Institute of Technology, Gokisocho, Showa-ku, Nagoya 466-8555, Japan
| | - Yoshiaki Kawashima
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
| | - Hiromitsu Yamamoto
- Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, 1-100, Kusumoto-cho, Chikusa-ku, Nagoya 464-8650, Japan
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29
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Takahashi C, Yamamoto H. PB-15STEM observation for understanding antibacterial mechanism of polymeric particles against biofilm. Microscopy (Oxf) 2016. [DOI: 10.1093/jmicro/dfw093] [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: 11/14/2022] Open
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30
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Talha M, Ghalamzan EAM, Takahashi C, Kuo J, Ingamells W, Stolkin R. Towards robotic decommissioning of legacy nuclear plant: Results of human-factors experiments with tele-robotic manipulation, and a discussion of challenges and approaches for decommissioning. 2016 IEEE International Symposium on Safety, Security, and Rescue Robotics (SSRR) 2016. [DOI: 10.1109/ssrr.2016.7784294] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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31
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Nakamura S, Uenoyama Y, Ikegami K, Dai M, Watanabe Y, Takahashi C, Hirabayashi M, Tsukamura H, Maeda KI. Neonatal Kisspeptin is Steroid-Independently Required for Defeminisation and Peripubertal Kisspeptin-Induced Testosterone is Required for Masculinisation of the Brain: A Behavioural Study Using Kiss1 Knockout Rats. J Neuroendocrinol 2016; 28. [PMID: 27344056 DOI: 10.1111/jne.12409] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2015] [Revised: 05/23/2016] [Accepted: 06/24/2016] [Indexed: 11/30/2022]
Abstract
Rodents show apparent sex differences in their sexual behaviours. The present study used Kiss1 knockout (KO) rats to evaluate the role of kisspeptin in the defeminisation/masculinisation of the brain mechanism that controls sexual behaviours. Castrated adult Kiss1 KO males treated with testosterone showed no male sexual behaviours but demonstrated the oestrogen-induced lordosis behaviours found in wild-type females. The sizes of some of the sexual dimorphic nuclei of Kiss1 KO male rats are similar to those of females. Plasma testosterone levels at embryonic day 18 and postnatal day 0 (PND0) in Kiss1 KO males were high, similar to wild-type males, indicating that perinatal testosterone is secreted in a kisspeptin-independent manner. Long-term exposure to testosterone from peripubertal to adult periods restored mounts and intromissions in KO males, suggesting that kisspeptin-dependent peripubertal testosterone secretion is required to masculinise the brain mechanism. This long-term testosterone treatment failed to abolish lordosis behaviours in KO males, whereas kisspeptin replacement at PND0 reduced lordosis quotients in Kiss1 KO males but not in KO females. These results suggest that kisspeptin itself is required to defeminise behaviour in the perinatal period, in cooperation with testosterone. Oestradiol benzoate treatment at PND0 suppressed lordosis quotients in Kiss1 KO rats, indicating that the mechanisms downstream of oestradiol work properly in the absence of kisspeptin. There was no significant difference in aromatase gene expression in the whole hypothalamus between Kiss1 KO and wild-type male rats at PND0. Taken together, the present study demonstrates that both perinatal kisspeptin and kisspeptin-independent testosterone are required for defeminisation of the brain, whereas kisspeptin-dependent testosterone during peripuberty to adulthood is needed for masculinisation of the brain in male rats.
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Affiliation(s)
- S Nakamura
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Y Uenoyama
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - K Ikegami
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - M Dai
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Y Watanabe
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - C Takahashi
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - M Hirabayashi
- Center for Genetic Analysis of Behaviour, National Institute for Physiological Sciences, Okazaki, Japan
| | - H Tsukamura
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - K-I Maeda
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan.
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32
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Vishwakarma R, Shinde SM, Rosmi MS, Takahashi C, Papon R, Mahyavanshi RD, Ishii Y, Kawasaki S, Kalita G, Tanemura M. Influence of oxygen on nitrogen-doped carbon nanofiber growth directly on nichrome foil. Nanotechnology 2016; 27:365602. [PMID: 27479000 DOI: 10.1088/0957-4484/27/36/365602] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The synthesis of various nitrogen-doped (N-doped) carbon nanostructures has been significantly explored as an alternative material for energy storage and metal-free catalytic applications. Here, we reveal a direct growth technique of N-doped carbon nanofibers (CNFs) on flexible nichrome (NiCr) foil using melamine as a solid precursor. Highly reactive Cr plays a critical role in the nanofiber growth process on the metal alloy foil in an atmospheric pressure chemical vapor deposition (APCVD) process. Oxidation of Cr occurs in the presence of oxygen impurities, where Ni nanoparticles are formed on the surface and assist the growth of nanofibers. Energy-dispersive x-ray spectroscopy (EDXS) and x-ray photoelectron spectroscopy (XPS) clearly show the transformation process of the NiCr foil surface with annealing in the presence of oxygen impurities. The structural change of NiCr foil assists one-dimensional (1D) CNF growth, rather than the lateral two-dimensional (2D) growth. The incorporation of distinctive graphitic and pyridinic nitrogen in the graphene lattice are observed in the synthesized nanofiber, owing to better nitrogen solubility. Our finding shows an effective approach for the synthesis of highly N-doped carbon nanostructures directly on Cr-based metal alloys for various applications.
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Affiliation(s)
- Riteshkumar Vishwakarma
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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33
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Takahashi C, Akachi Y, Ogawa N, Moriguchi K, Asaka T, Tanemura M, Kawashima Y, Yamamoto H. Morphological study of efficacy of clarithromycin-loaded nanocarriers for treatment of biofilm infection disease. Med Mol Morphol 2016; 50:9-16. [PMID: 27119723 DOI: 10.1007/s00795-016-0141-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2016] [Accepted: 04/11/2016] [Indexed: 11/24/2022]
Abstract
In this study, we developed a drug delivery system (DDS) using polymeric nanocarriers for the treatment of biofilm infection disease. Clarithromycin (CAM)-encapsulated and chitosan (CS) modified polymeric nanoparticles (NPs) were prepared using a polyvinyl caprolactam-polyvinyl acetate-polyethylene glycol graft copolymer (Soluplus®) (Sol) and poly-(DL-lactide-co-glycolide), respectively. To understand the availability of the prepared NPs, we made morphological observations of the antibacterial activity derived from the NPs toward the bacterial cells within the biofilm using scanning electron microscopy and transmission electron microscopy measurements. These results revealed different antibacterial activities for the two types of drug carriers. In the case of CAM-encapsulated + CS-modified Sol micelles treatment, NPs can exert their antibacterial activity not only by the surfactant, CAM and CS effects but also by intrusion into the bacterial cells. Thereby, CAM-encapsulated + CS-modified Sol micelles had a higher antibacterial activity. The morphological information is useful to design suitable NPs for the treatment against biofilm infections.
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Affiliation(s)
- Chisato Takahashi
- School of Pharmacy, Pharmaceutical Engineering, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan.
| | - Yuki Akachi
- School of Pharmacy, Pharmaceutical Engineering, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Noriko Ogawa
- School of Pharmacy, Pharmaceutical Engineering, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Keiichi Moriguchi
- Department of Oral Anatomy, School of Dentistry, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Toru Asaka
- Department of Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
| | - Masaki Tanemura
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, Aichi, 466-8555, Japan
| | - Yoshiaki Kawashima
- School of Pharmacy, Pharmaceutical Engineering, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
| | - Hiromitsu Yamamoto
- School of Pharmacy, Pharmaceutical Engineering, Aichi-Gakuin University, 1-100 Kusumoto-cho, Chikusa-ku, Nagoya, Aichi, 464-8650, Japan
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34
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Takahashi C, Muto S, Yamamoto H. A microscopy method for scanning transmission electron microscopy imaging of the antibacterial activity of polymeric nanoparticles on a biofilm with an ionic liquid. J Biomed Mater Res B Appl Biomater 2016; 105:1432-1437. [DOI: 10.1002/jbm.b.33680] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Revised: 03/09/2016] [Accepted: 03/29/2016] [Indexed: 12/26/2022]
Affiliation(s)
- Chisato Takahashi
- Pharmaceutical Engineering; School of Pharmacy; Aichi Gakuin University; Nagoya Aichi Japan
| | - Shunsuke Muto
- Institute of Materials and Systems for Sustainability; Nagoya University; Nagoya Aichi Japan
| | - Hiromitsu Yamamoto
- Pharmaceutical Engineering; School of Pharmacy; Aichi Gakuin University; Nagoya Aichi Japan
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35
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Nagane K, Kimura S, Ukai K, Takahashi C, Ogawa N, Yamamoto H. Application of spherical silicate to prepare solid dispersion dosage forms with aqueous polymers. Int J Pharm 2015. [DOI: 10.1016/j.ijpharm.2015.07.037] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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36
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Takahashi C, Mizuta S, Nishiyama R, Yamaguchi K, Kitaya K, Matsubayashi H, Ishikawa T. Effect of artificial oocyte activation in intracytoplasmic sperm injection using testicular spermatozoa on sibling oocytes. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ogawa N, Furuishi T, Nagase H, Endo T, Takahashi C, Yamamoto H, Kawashima Y, Loftsson T, Kobayashi M, Ueda H. Interaction of fentanyl with various cyclodextrins in aqueous solutions. ACTA ACUST UNITED AC 2015; 68:588-97. [PMID: 26077960 DOI: 10.1111/jphp.12437] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 04/19/2015] [Indexed: 11/27/2022]
Abstract
OBJECTIVES Water-soluble fentanyl citrate salt has been used in sublingual or buccal formulations for the breakthrough pain treatment. However, fentanyl absorption through the lipid mucosal membrane may be improved by enhancing the non-ionic lipophilic fentanyl base solubility. Therefore, the interaction between cyclodextrins (CDs) and fentanyl base has been evaluated to obtain basic information for its application. METHODS Parent CDs (α-, β- and γ-CD) as well as α- and β-CD derivatives were used for solubility studies with fentanyl base. Nuclear magnetic resonance (NMR) studies were applied in a system including β-CD or glucosyl-β-CD (G1-β-CD) with fentanyl base or fentanyl citrate. (1) H- and (13) C-NMR studies and a two-dimensional rotating frame Overhauser effect spectroscopy (ROESY) study were conducted to confirm inclusion complexes formation. KEY FINDINGS Parent CDs displayed BS type phase solubility diagrams; β-CD exhibited a strong interaction with fentanyl base. Hydrophilic β-CD derivatives, such as G1-β-CD, displayed AL type phase diagrams and higher solubilizing effects compared with parent CDs. ROESY study suggested that fentanyl phenyl groups were included in β-CD cavity. CONCLUSIONS This study revealed that hydrophilic β-CD derivatives, such as G1-β-CD, could be useful pharmaceutical additives for oral mucosal formulations because of the improved fentanyl base solubility via inclusion complexation.
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Affiliation(s)
- Noriko Ogawa
- Department of Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, Nagoya, Iceland
| | - Takayuki Furuishi
- Department of Physical Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, Tokyo, Iceland
| | - Hiromasa Nagase
- Department of Physical Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, Tokyo, Iceland
| | - Tomohiro Endo
- Department of Physical Chemistry, Faculty of Pharmaceutical Sciences, Hoshi University, Tokyo, Iceland
| | - Chisato Takahashi
- Department of Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, Nagoya, Iceland
| | - Hiromitsu Yamamoto
- Department of Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, Nagoya, Iceland
| | - Yoshiaki Kawashima
- Department of Pharmaceutical Engineering, School of Pharmacy, Aichi Gakuin University, Nagoya, Iceland
| | - Thorsteinn Loftsson
- Faculty of Pharmaceutical Sciences, University of Iceland, Reykjavik, Iceland
| | - Masaru Kobayashi
- Department of Physical Chemistry, Nihon Pharmaceutical University, Saitama, Japan
| | - Haruhisa Ueda
- Department of Physical Chemistry, Nihon Pharmaceutical University, Saitama, Japan
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Muramatsu R, Kuroda M, Matoba K, Lin H, Takahashi C, Koyama Y, Yamashita T. Prostacyclin prevents pericyte loss and demyelination induced by lysophosphatidylcholine in the central nervous system. J Biol Chem 2015; 290:11515-25. [PMID: 25795781 DOI: 10.1074/jbc.m114.587253] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [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: 06/05/2014] [Indexed: 11/06/2022] Open
Abstract
Pericytes play pivotal roles in physiological and pathophysiological conditions in the central nervous system. As pericytes prevent vascular leakage, they can halt neuronal damage stemming from a compromised blood-brain barrier. Therefore, pericytes may be a good target for the treatment of neurodegenerative disorders, although evidence is lacking. In this study, we show that prostacyclin attenuates lysophosphatidylcholine (LPC)-mediated vascular dysfunction through pericyte protection in the adult mouse spinal cord. LPC decreased the number of pericytes in an in vitro blood-brain barrier model, and this decrease was prevented by iloprost treatment, a prostacyclin analog. Intrathecal administration of iloprost attenuated vascular barrier disruption after LPC injection in the mouse spinal cord. Furthermore, iloprost treatment diminished demyelination and motor function deficits in mice injected with LPC. These results support the notion that prostacyclin acts on pericytes to maintain vascular barrier integrity.
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Affiliation(s)
- Rieko Muramatsu
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and Precursory Research for Embryonic Science and Technology, Japan Science and Technology Agency, 5 Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
| | - Mariko Kuroda
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and
| | - Ken Matoba
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and
| | - Hsiaoyun Lin
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and
| | - Chisato Takahashi
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and
| | - Yoshihisa Koyama
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and
| | - Toshihide Yamashita
- From the Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871 and Core Research for Evolutional Science and Technology and
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Takahashi C, Ogawa N, Kawashima Y, Yamamoto H. Observation of antibacterial effect of biodegradable polymeric nanoparticles onStaphylococcus epidermidisbiofilm using FE-SEM with an ionic liquid. Microscopy (Oxf) 2015; 64:169-80. [DOI: 10.1093/jmicro/dfv010] [Citation(s) in RCA: 21] [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] [Received: 11/28/2014] [Accepted: 02/02/2015] [Indexed: 01/08/2023] Open
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40
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Ogawa N, Takahashi C, Yamamoto H. Physicochemical Characterization of Cyclodextrin–Drug Interactions in the Solid State and the Effect of Water on These Interactions. J Pharm Sci 2015; 104:942-54. [DOI: 10.1002/jps.24319] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Revised: 11/30/2014] [Accepted: 12/02/2014] [Indexed: 11/09/2022]
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41
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Takahashi C, Saito S, Suda A, Ogawa N, Kawashima Y, Yamamoto H. Antibacterial activities of polymeric poly(dl-lactide-co-glycolide) nanoparticles and Soluplus® micelles against Staphylococcus epidermidis biofilm and their characterization. RSC Adv 2015. [DOI: 10.1039/c5ra13885j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
We have successfully prepared polymeric micelles based on polyvinyl caprolactam–polyvinyl acetate–polyethylene glycol graft copolymer (Soluplus®) for a drug delivery system on a biofilm.
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Affiliation(s)
- Chisato Takahashi
- Pharmaceutical Engineering
- School of Pharmacy
- Aichi Gakuin University
- Nagoya
- Japan
| | - Shoko Saito
- Pharmaceutical Engineering
- School of Pharmacy
- Aichi Gakuin University
- Nagoya
- Japan
| | - Asami Suda
- Pharmaceutical Engineering
- School of Pharmacy
- Aichi Gakuin University
- Nagoya
- Japan
| | - Noriko Ogawa
- Pharmaceutical Engineering
- School of Pharmacy
- Aichi Gakuin University
- Nagoya
- Japan
| | - Yoshiaki Kawashima
- Pharmaceutical Engineering
- School of Pharmacy
- Aichi Gakuin University
- Nagoya
- Japan
| | - Hiromitsu Yamamoto
- Pharmaceutical Engineering
- School of Pharmacy
- Aichi Gakuin University
- Nagoya
- Japan
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42
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Yaakob Y, Mohd Yusop MZ, Takahashi C, Rosmi MS, Kalita G, Tanemura M. In situ transmission electron microscopy of Ag-incorporated carbon nanofibers: the effect of Ag nanoparticle size on graphene formation. RSC Adv 2015. [DOI: 10.1039/c4ra11059e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We have studied graphene formation from a single Ag-incorporated carbon nanofiber (CNF) during electron emission using in situ transmission electron microscopy.
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Affiliation(s)
- Yazid Yaakob
- Department of Frontier Materials
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
- Department of Physics
| | - Mohd Zamri Mohd Yusop
- Department of Frontier Materials
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
- Department of Materials
| | | | - Mohamad Saufi Rosmi
- Department of Frontier Materials
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
- Department of Chemistry
| | - Golap Kalita
- Department of Frontier Materials
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
| | - Masaki Tanemura
- Department of Frontier Materials
- Nagoya Institute of Technology
- Nagoya 466-8555
- Japan
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43
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Rosmi MS, Yusop MZ, Kalita G, Yaakob Y, Takahashi C, Tanemura M. Visualizing copper assisted graphene growth in nanoscale. Sci Rep 2014; 4:7563. [PMID: 25523645 PMCID: PMC4271261 DOI: 10.1038/srep07563] [Citation(s) in RCA: 14] [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: 10/12/2014] [Accepted: 11/28/2014] [Indexed: 11/09/2022] Open
Abstract
Control synthesis of high quality large-area graphene on transition metals (TMs) by chemical vapor deposition (CVD) is the most fascinating approach for practical device applications. Interaction of carbon atoms and TMs is quite critical to obtain graphene with precise layer number, crystal size and structure. Here, we reveal a solid phase reaction process to achieve Cu assisted graphene growth in nanoscale by in-situ transmission electron microscope (TEM). Significant structural transformation of amorphous carbon nanofiber (CNF) coated with Cu is observed with an applied potential in a two probe system. The coated Cu particle recrystallize and agglomerate toward the cathode with applied potential due to joule heating and large thermal gradient. Consequently, the amorphous carbon start crystallizing and forming sp2 hybridized carbon to form graphene sheet from the tip of Cu surface. We observed structural deformation and breaking of the graphene nanoribbon with a higher applied potential, attributing to saturated current flow and induced Joule heating. The observed graphene formation in nanoscale by the in-situ TEM process can be significant to understand carbon atoms and Cu interaction.
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Affiliation(s)
- Mohamad Saufi Rosmi
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Mohd Zamri Yusop
- 1] Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan [2] Department of Materials, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor, Malaysia
| | - Golap Kalita
- 1] Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan [2] Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya, 466-8555, Japan
| | - Yazid Yaakob
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Chisato Takahashi
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Masaki Tanemura
- Department of Frontier Materials, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Hamasaki M, Matsumura S, Satou A, Takahashi C, Oda Y, Higashiura C, Ishihama Y, Toyoshima F. Pregnenolone functions in centriole cohesion during mitosis. Chem Biol 2014; 21:1707-21. [PMID: 25525990 DOI: 10.1016/j.chembiol.2014.11.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/26/2014] [Accepted: 11/03/2014] [Indexed: 12/11/2022]
Abstract
Cell division is controlled by a multitude of protein enzymes, but little is known about roles of metabolites in this mechanism. Here, we show that pregnenolone (P5), a steroid that is produced from cholesterol by the steroidogenic enzyme Cyp11a1, has an essential role in centriole cohesion during mitosis. During prometa-metaphase, P5 is accumulated around the spindle poles. Depletion of P5 induces multipolar spindles that result from premature centriole disengagement, which are rescued by ectopic introduction of P5, but not its downstream metabolites, into the cells. Premature centriole disengagement, induced by loss of P5, is not a result of precocious activation of separase, a key factor for the centriole disengagement in anaphase. Rather, P5 directly binds to the N-terminal coiled-coil domain of short-form of shugoshin 1 (sSgo1), a protector for centriole cohesion and recruits it to spindle poles in mitosis. Our results thus reveal a steroid-mediated centriole protection mechanism.
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Affiliation(s)
- Mayumi Hamasaki
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan; Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Shigeru Matsumura
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan; Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Ayaka Satou
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Chisato Takahashi
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yukako Oda
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan; Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Chika Higashiura
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan; Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
| | - Yasushi Ishihama
- Department of Molecular and Cellular BioAnalysis, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Fumiko Toyoshima
- Department of Cell Biology, Institute for Virus Research, Kyoto University, Sakyo-ku, Kyoto 606-8507, Japan; Department of Cell and Developmental Biology, Graduate School of Biostudies, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan.
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45
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Kenmochi N, Minami T, Takahashi C, Tei S, Mizuuchi T, Kobayashi S, Nagasaki K, Nakamura Y, Okada H, Kado S, Yamamoto S, Ohshima S, Konoshima S, Shi N, Zang L, Ohtani Y, Kasajima K, Sano F. First measurement of time evolution of electron temperature profiles with Nd:YAG Thomson scattering system on Heliotron J. Rev Sci Instrum 2014; 85:11D819. [PMID: 25430232 DOI: 10.1063/1.4890255] [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] [Indexed: 06/04/2023]
Abstract
A Nd:YAG Thomson scattering system has been developed for Heliotron J. The system consists of two 550 mJ 50 Hz lasers, large collection optics, and 25 radial channel (∼1 cm spatial resolution) interference polychromators. This measurement system achieves a S/N ratio of ∼50 for low-density plasma (ne ∼ 0.5 × 10(19) m(-3)). A time evolution of electron temperature profiles was measured with this system for a high-intensity gas-puff (HIGP) fueling neutral-beam-injection plasma. The peripheral temperature of the higher-density phase after HIGP recovers to the low-density pre-HIGP level, suggesting that improving particle transport in the HIGP plasma may be possible.
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Affiliation(s)
- N Kenmochi
- Graduate School of Energy Science, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - T Minami
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - C Takahashi
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - S Tei
- Graduate School of Energy Science, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - T Mizuuchi
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - S Kobayashi
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - K Nagasaki
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Y Nakamura
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - H Okada
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - S Kado
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - S Yamamoto
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - S Ohshima
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - S Konoshima
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - N Shi
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - L Zang
- Graduate School of Energy Science, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - Y Ohtani
- Graduate School of Energy Science, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - K Kasajima
- Graduate School of Energy Science, Kyoto University, Gokasho, Uji 611-0011, Japan
| | - F Sano
- Institute of Advanced Energy, Kyoto University, Gokasho, Uji 611-0011, Japan
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46
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Takahashi C, Kaneko Y, Okano Y, Ooshima H, Takeuchi T. THU0118 Methotrexate Polyglutamates in Erythrocytes Correlates with Clinical Response in Japanese Patients with Rheumatoid Arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2014-eular.3527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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47
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Takahashi C, Pattanayak DK, Shirai T, Fuji M. Solvent effect on observation of nanostructural hydrated porous ceramic green bodies using hydrophilic ionic liquid. RSC Adv 2014. [DOI: 10.1039/c4ra02359e] [Citation(s) in RCA: 5] [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: 02/06/2023] Open
Abstract
A convenient characterization method of a nanostructural hydrated porous ceramic body using a hydrophilic ionic liquid is established.
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Affiliation(s)
- Chisato Takahashi
- Advanced Ceramics Research Center
- Nagoya Institute of Technology
- Tajimi, Japan
| | | | - Takashi Shirai
- Advanced Ceramics Research Center
- Nagoya Institute of Technology
- Tajimi, Japan
| | - Masayoshi Fuji
- Advanced Ceramics Research Center
- Nagoya Institute of Technology
- Tajimi, Japan
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48
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Takahashi C, Muramatsu R, Fujimura H, Mochizuki H, Yamashita T. Prostacyclin promotes oligodendrocyte precursor recruitment and remyelination after spinal cord demyelination. Cell Death Dis 2013; 4:e795. [PMID: 24030147 PMCID: PMC3789193 DOI: 10.1038/cddis.2013.335] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2013] [Accepted: 08/07/2013] [Indexed: 12/21/2022]
Abstract
Adult oligodendrocyte precursor cells (OPCs) are located adjacent to demyelinated lesion and contribute to myelin repair. The crucial step in remyelination is the migration of OPCs to the demyelinated area; however, the mechanism of OPC migration remains to be fully elucidated. Here we show that prostacyclin (prostaglandin I2, PGI2) promotes OPC migration, thereby promoting remyelination and functional recovery in mice after demyelination induced by injecting lysophosphatidylcholine (LPC) into the spinal cord. Prostacyclin analogs enhanced OPC migration via a protein kinase A (PKA)-dependent mechanism, and prostacyclin synthase expression was increased in the spinal cord after LPC injection. Notably, pharmacological inhibition of prostacyclin receptor (IP receptor) impaired remyelination and motor recovery, whereas the administration of a prostacyclin analog promoted remyelination and motor recovery after LPC injection. Our results suggest that prostacyclin could be a key molecule for facilitating the migration of OPCs that are essential for repairing demyelinated areas, and it may be useful in treating disorders characterized by demyelination.
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Affiliation(s)
- C Takahashi
- Department of Molecular Neuroscience, Graduate School of Medicine, Osaka University, Suita, Osaka 565-0871, Japan
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Nakanishi H, Kojima M, Takahashi C, Ohsuna M, Imazu S, Nonomura M, Hasegawa M, Yoshikawa M, Nagayama Y, Kawahata K. Fusion virtual laboratory: The experiments’ collaboration platform in Japan. Fusion Engineering and Design 2012. [DOI: 10.1016/j.fusengdes.2012.04.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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50
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Takahashi C, Shirai T, Fuji M. FE-SEM observation of swelled seaweed using hydrophilic ionic liquid; 1-butyl-3-methylimidazolium tetrafluoroborate. Microsc Res Tech 2012; 76:66-71. [DOI: 10.1002/jemt.22137] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 09/17/2012] [Indexed: 01/09/2023]
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