23 results on '"Tomomi Nakao"'
Search Results
2. A single‐sided trans‐nasal catheter for smooth and efficient oxygen delivery can improve the safety in patients undergoing pancreato‐biliary endoscopy under intravenous sedation: A randomized trial
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Ken Ishii, Kensuke Kubota, Tomomi Nakao, Yuji Koyama, Yuji Fujita, Kuniaki Akaba, Nobuyuki Matsuhashi, and Atsushi Nakajima
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General Medicine - Abstract
Pancreato-biliary endoscopic procedures often need to be performed under deep intravenous sedation. The patients are at an increased risk of respiratory depression influenced by the anatomical dead space of the upper respiratory system. We aimed to evaluate the benefit of oxygen delivery through a single-sided trans-nasal catheter (TC) for patients undergoing pancreato-biliary endoscopy.Oxygen supplementation during the procedure was provided either by insertion of a single-sided TC or insertion of a conventional nasal catheter (NC). A prospective, single-blind, randomized controlled study was conducted in two groups.The number of patients who indicated a decrease in the peripheral transcutaneous oxygen saturation (SpO2; desaturation) was significantly lower in the TC group than in the counterpart (8/58; 13.8% vs. 26/58; 44.8%A single-sided TC placed in the pharynx in patients undergoing pancreato-biliary endoscopy prepares a superior condition of the patients for venous sedation, maintained hyper-oxygen saturation and a relatively higher SpO2 level to be maintained in limited conditions to reduce the dead space with acceptable tolerance, as compared to the placement of a conventional NC.
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- 2022
3. Adverse Effects of Circadian Disorganization on Mood and Molecular Rhythms in the Prefrontal Cortex of Mice
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Hue Thi Le, Masanobu Maeda, Fuyuki Sato, Akira Kohsaka, Hayato Ihara, Tsuyoshi Otsuka, and Tomomi Nakao
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Male ,0301 basic medicine ,Prefrontal Cortex ,Shift work ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Rhythm ,Circadian Clocks ,medicine ,Animals ,Circadian rhythm ,Wakefulness ,Prefrontal cortex ,business.industry ,General Neuroscience ,medicine.disease ,Circadian Rhythm ,Mice, Inbred C57BL ,CLOCK ,030104 developmental biology ,Mood ,Mood disorders ,Sleep ,business ,Neuroscience ,030217 neurology & neurosurgery - Abstract
Disturbance of the daily cycles in sleep and wakefulness induced by conditions such as shift work and jet lag can increase the risk of affective disorders including anxiety and depression. The way such circadian disorganization disrupts the regulation of mood, however, is not well understood. More specifically, the impact of circadian disorganization on the daily rhythms of the neuronal function that controls mood remains unclear. We therefore investigated the effects of circadian disorganization on expression rhythms of clock genes as well as immediate early genes (IEGs) in several mood-controlling regions of the brain. To introduce circadian disorganization of behaviors, we exposed male C57BL/6J mice to chronic reversal of the light-dark cycle and we found a marked negative mood phenotype in these mice. Importantly, the most adverse effect of circadian disorganization on expression rhythms of clock and IEGs was observed in the prefrontal cortex (PFC) when compared to that in other mood-related areas of the brain. Dysregulation of molecular rhythms in the PFC is therefore suggested to be associated with the development of mood disorders in conditions including shift work and jet lag.
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- 2020
4. [A case of unresectable advanced gastric cancer with oral mucosal necrosis during combination therapy with nab-paclitaxel plus ramucirumab]
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Munehiro, Wakabayashi, Yoshinori, Kikuchi, Kazuhisa, Yamaguchi, Moeko, Namiki, Tomomi, Nakao, Yusuke, Kimura, Ken, Ito, and Yoshinori, Igarashi
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Necrosis ,Paclitaxel ,Stomach Neoplasms ,Albumins ,Antineoplastic Combined Chemotherapy Protocols ,Humans ,Middle Aged ,Antibodies, Monoclonal, Humanized - Abstract
A 61-year-old patient with advanced gastric cancer was treated with ramucirumab plus albumin-suspended paclitaxel as second-line treatment. The treatment resulted in exposure of the right mandible around an implant. The implant was removed, and sequestration was not observed. The patient was diagnosed with oral mucosal necrosis. Thus, implants may cause mucosal necrosis due to angiogenesis inhibitors.
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- 2022
5. Deficiency of the Circadian Clock Gene Rev-Erbα Induces Mood Disorders and Dysregulation of the Serotonergic System in Mice
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Tsuyoshi Otsuka, Hue Thi Le, Zaw Lin Thein, Hayato Ihara, Fuyuki Sato, Tomomi Nakao, and Akira Kohsaka
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History ,Polymers and Plastics ,Business and International Management ,Industrial and Manufacturing Engineering - Published
- 2022
6. A case of small intestinal ulcer with active bleeding stopped by endoscopic hemoclipping
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Tsunetaka Arai, Masashi Ono, Yurie Ogawa, Tomomi Nakao, Nobuhiro Dan, Yoshinori Igarashi, Yuri Enomoto, Ryusuke Kimura, Hiroki Nakagawa, Aya Hojo, Ryo Shimizu, Yusuke Nishikawa, and Yoshiro Yamamoto
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medicine.medical_specialty ,business.industry ,Mechanical Engineering ,Internal medicine ,Small Intestinal Ulcer ,medicine ,Energy Engineering and Power Technology ,Management Science and Operations Research ,business ,Gastroenterology - Published
- 2020
7. The efficacy and safety of cold snare polypectomy for the patients with colorectal polyps under antithrombotic therapy
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Yohei Minato, Tomomi Nakao, Takashi Muramoto, Rindo Ishii, Risato Takeda, Yoshiaki Kimoto, Maiko Takita, Sayaka Ogawa, Ken Ohata, Eji Sakai, Ryojyu Negishi, Takafumi Konishi, Nobuyuki Matsuhashi, and Keisuke Kanda
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medicine.medical_specialty ,business.industry ,Mechanical Engineering ,medicine.medical_treatment ,Antithrombotic ,medicine ,Cold snare ,Energy Engineering and Power Technology ,Management Science and Operations Research ,business ,Polypectomy ,Surgery - Published
- 2019
8. Employment factors associated with daily time management in working people with type 2 diabetes
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Tomomi Nakao, Yuichi Sato, Yasuko Shimizu, Yuji Uchizono, Chiyo Tsutsumi, and Chizuko Takeishi
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Employment ,Gerontology ,Self-management ,Research and Theory ,Time Management ,Questionnaire ,Type 2 Diabetes Mellitus ,030209 endocrinology & metabolism ,Shift work ,03 medical and health sciences ,0302 clinical medicine ,Rhythm ,Diabetes Mellitus, Type 2 ,Surveys and Questionnaires ,Scale (social sciences) ,Humans ,Time management ,030212 general & internal medicine ,Psychology ,Goal setting - Abstract
Aim To determine the employment factors associated with daily time management in working people with type 2 diabetics. Methods A questionnaire survey was administered to 277 working people with type 2 diabetes. It included a daily time management scale, and questions about age, gender, hemoglobin A1c levels, shift work, managerial position, and average working hours. Multiple regression analysis was used to assess the relationship between daily time management and each factor, adjusted for age, gender, and hemoglobin A1c. Results Responses were obtained from 220 individuals. Daily time management was associated with managerial position (being a manager) and working hours. Shift work was associated with "adjustment of life rhythms" and managerial position was associated with "adjustment of work" and "goal setting and behaviors consistent with personal values". Hours of work were associated with "adjustment of life rhythms" and "time control". Conclusion When providing support on time management to working people with type 2 diabetes mellitus, any assessment should consider the availability of shift work, whether they are in a managerial position and working hours.
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- 2020
9. Contribution of chemotherapy to improved prognosis in stage 4 gastric cancer: trend analysis of a regional population-based cancer registry in Japan
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Tomomi, Nakao, Rena, Kaneko, Hirokazu, Tanaka, Shunsuke, Kobayashi, Risa, Omori, Yuichiro, Yano, Kentaro, Kamada, Takashi, Ikehara, Yuzuru, Sato, and Yoshinori, Igarashi
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Japan ,Stomach Neoplasms ,Humans ,Antineoplastic Agents ,Registries ,Middle Aged ,Prognosis ,Survival Analysis ,Neoplasm Staging ,Retrospective Studies - Abstract
Little is known about time trends in the prognosis of gastric cancer (GC), since the introduction of new chemotherapeutic agents. This study aimed to analyze how the increased number of available chemotherapeutic options affected the prognosis of GC and which patient types benefited within in a large population.From a population-based cancer registry in Japan, 35,751 cases of GC were identified. Of these, 8214 cases were stage 4. The time trend for 3-year survival in stage 4 GC according to patient characteristics (age and tumor location) was estimated in relation to the introduction of new anticancer drugs. Multiple imputation was performed for sensitivity analysis to strengthen the missing data. In addition, we estimated the 5-year survival rate for distal-GC (DGC) and proximal-GC (PGC), and the hazard ratio (HR) was estimated by Cox proportional hazard model.Improvement of overall survival was accelerated in stage 4 cases over time. The prognosis was improved from 11.4% to 13.2%, subsequent to the approval of several oncologic drugs since 2009. Younger patients were more likely to have improved survival rates in response to the increase in chemotherapy options ( 60-year-old, 5.4%: 60-70, 2.2%; 70-80, 0.3%) from 2007 to 2015. The HR for DGC vs. PGC was 1.11 (95% CI 1.08-1.15), and PGC showed a higher rate of improved outcomes (2.4% vs. 0.6%).This analysis showed that improvement in the GC survival rate was accelerated by the introduction of new chemotherapeutic strategies and it was most evident among younger patients and in patients with PGC.
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- 2020
10. Efficacy of Upper Gastrointestinal Endoscopic Examination to Identify Patients with Obstructive Sleep Apnea Syndrome: A Retrospective Cross-Sectional Study
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Tatsuo Morinushi, Sayaka Ueno, Teruo Nakaya, Ken Ohata, Shigeyuki Nakaji, Rindo Ishii, Ryoju Negishi, Yoshiaki Kimoto, Ikuro Koba, Eiji Sakai, Maiko Takita, Takashi Muramoto, Takafumi Konishi, Nobuyuki Matsuhashi, and Tomomi Nakao
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Male ,medicine.medical_specialty ,Cross-sectional study ,Polysomnography ,Logistic regression ,Gastroenterology ,Internal medicine ,medicine ,Humans ,Endoscopy, Digestive System ,Tokyo ,Aged ,Retrospective Studies ,Sleep Apnea, Obstructive ,medicine.diagnostic_test ,business.industry ,Incidence ,Incidence (epidemiology) ,Middle Aged ,Airway obstruction ,medicine.disease ,respiratory tract diseases ,Endoscopy ,Airway Obstruction ,Obstructive sleep apnea ,Cross-Sectional Studies ,Female ,business ,Body mass index - Abstract
Background/Aims: Despite the high prevalence of obstructive sleep apnea syndrome (OSAS), most individuals are unaware of its diagnosis. We assessed whether an upper gastrointestinal (GI) endoscopy can accurately predict the incidence of OSAS. Methods: After endoscopic evaluation of laryngo-pharyngeal collapse, a total of 154 subjects with laryngo-pharyngeal collapse and 52 control subjects underwent polysomnography. Based on the modified Fujita Classification, upper airway obstruction was classified into 3 different types: oropharyngeal, supraglottic and combined type, and associations between upper airway obstruction and OSAS were evaluated. Results: Of 154 subjects with laryngo-pharyngeal collapse, 108 (70.1%) were diagnosed as OSAS, while only 4 (7.7%) control subjects were diagnosed as OSAS (p < 0.001). The sensitivity and specificity of endoscopic diagnosis were 96.4 and 51.1%, respectively. Oropharyngeal involvement was frequently found in 90.2% of the subjects (139/154). The severity of upper airway obstruction was significantly correlated with the apnea-hypopnea index score (r = 0.55, p < 0.001). A multivariate logistic regression analysis revealed that a male sex (OR 5.20; 95% CI 2.65–10.2, p < 0.001), body mass index ≥25 kg/m2 (OR 4.98; 95% CI 2.23–11.2, p = 0.02) and severe obstruction (OR 7.79; 95% CI 3.34–18.2, p < 0.001) were significant independent predictors of severe OSAS. Conclusion: A conventional upper GI endoscopic examination might be useful as a diagnostic modality for OSAS.
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- 2018
11. A mixed methods study to examine the difficulties experienced and coping behaviours used by people with Type 2 diabetes of working age in Japan
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Tomomi Nakao, Kiyohide Nunoi, Yasuko Shimizu, and Yuichi Sato
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Coping (psychology) ,Self-management ,Multimethodology ,Coping behaviour ,030209 endocrinology & metabolism ,General Medicine ,Type 2 diabetes ,medicine.disease ,Developmental psychology ,03 medical and health sciences ,0302 clinical medicine ,medicine ,Self care ,030212 general & internal medicine ,Working age ,Psychology ,Clinical psychology ,Patient education - Abstract
The aim of this study was to investigate measures to support people of working age with Type 2 diabetes by clarifying their coping behaviours.Mixed research methods were adopted. The questionnaires...
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- 2017
12. THE SAFETY OF COLD SNARE POLYPECTOMY (CSP) ON ANTITHROMBOTIC THERAPY
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Keisuke Kanda, Ken Ohata, Maiko Takita, Rindo Ishii, H Tanaka, R Takeda, S Ogawa, Nobuyuki Matsuhashi, N Konishi, Eiji Sakai, Yoshiaki Kimoto, Tomomi Nakao, Yohei Minato, T Shiga, Takashi Muramoto, and Ryoju Negishi
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medicine.medical_specialty ,business.industry ,medicine.medical_treatment ,Antithrombotic ,medicine ,Cold snare ,business ,Polypectomy ,Surgery - Published
- 2019
13. Clinical Outcomes of Patients with Small Rectal Neuroendocrine Tumors Treated Using Endoscopic Submucosal Resection with a Ligation Device
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Keisuke Kanda, Ken Ohata, Ryoju Negishi, Teppei Morikawa, Takafumi Konishi, Eiji Sakai, Rindo Ishii, Nobuyuki Matsuhashi, Yoshiaki Kimoto, Takashi Muramoto, Tomomi Nakao, Sakaya Ueno, Maiko Takita, and Hirotsugu Hashimoto
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Endoscopic Mucosal Resection ,Lymphovascular invasion ,Perforation (oil well) ,Lymph node metastasis ,Neuroendocrine tumors ,Resection ,03 medical and health sciences ,Young Adult ,0302 clinical medicine ,medicine ,Effective treatment ,Humans ,Intestinal Mucosa ,Ligation ,Aged ,Retrospective Studies ,business.industry ,Rectal Neoplasms ,Gastroenterology ,Middle Aged ,medicine.disease ,Prognosis ,Surgery ,Neuroendocrine Tumors ,Logistic Models ,Treatment Outcome ,030220 oncology & carcinogenesis ,Multivariate Analysis ,030211 gastroenterology & hepatology ,Female ,business ,Endoscopic treatment - Abstract
Background/Aims: The therapeutic strategies for small rectal neuroendocrine tumors (NETs) have not been standardized. We examined the efficacy and safety of endoscopic submucosal resection with a ligation device (ESMR-L) and the long-term outcomes after endoscopic treatment. Methods: A total of 181 patients with rectal NETs Results: R0 resection was achieved in 180 cases (99.4%). Lymphovascular invasion was confirmed in 67 cases (37.0%), while a curative resection was achieved in 114 cases (63.0%). One perforation (0.6%) and 11 cases with delayed bleeding (6.1%) were observed. A multivariate logistic regression analysis revealed that a tumor size > 5 mm (OR 2.06; 95% CI 1.04–4.08, p = 0.04) was a significant independent predictor of the presence of lymphovascular invasion. Of the 67 patients with non-curative resections, 11 patients underwent additional surgery; lymph node metastasis was confirmed in 2 cases (18.2%). No local or distant metastases were observed during the follow-up period in 77 patients with a curative resection, 9 patients who received additional surgery, and 50 patients with non-curative resections. Conclusion: ESMR-L is an easy, safe and effective treatment for rectal NETs
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- 2018
14. Development of the Daily Time Management Scale for Use by Working People with Type 2 Diabetes
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Kiyohide Nunoi, Mika Mizuno, Chizuko Takeishi, Yumi Yokobori, Yasuko Shimizu, Yuichi Sato, Toyojiro Matsuishi, Tomomi Nakao, Hisayoshi Okamura, and Yuji Uchizono
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Adult ,Employment ,Male ,Type 2 diabetes ,03 medical and health sciences ,0302 clinical medicine ,Cronbach's alpha ,Surveys and Questionnaires ,medicine ,Humans ,030212 general & internal medicine ,Reliability (statistics) ,030504 nursing ,Research and Theory ,Questionnaire ,Reproducibility of Results ,Time Management ,Middle Aged ,medicine.disease ,Confirmatory factor analysis ,Exploratory factor analysis ,Test (assessment) ,Self Care ,Diabetes Mellitus, Type 2 ,Scale (social sciences) ,Female ,0305 other medical science ,Psychology ,Clinical psychology - Abstract
Aim The purpose of this study was to develop a scale to assess daily time management capabilities among working patients with diabetes and to test this scale's reliability and validity. Methods A self-administered questionnaire survey was conducted among 277 diabetes outpatients, and data from 220 participants (mean age = 54.3 ± 10.2 years, 76.8% male) were analyzed. Questionnaire items were selected through exploratory factor analysis. During the process of developing the questionnaire, opinions were solicited from experts on education for patients with diabetes, and Cronbach's α was calculated as a coefficient of reliability. Correlations with the Instrument of Diabetes Self-Care Agency (IDSCA) were examined and confirmatory factor analysis was performed to check for validity. Results Adequacy of a 4-factor, 16-item scale was confirmed. Cronbach's α coefficient was ≥.7 for the entire scale and for the subscale items. There was a significant correlation between total IDSCA scores and various factors (r = .280-.469). However, there was no correlation between the "adjustment of life rhythms" and parts of the IDSCA subscale. Conclusion Although some aspects warrant further investigation, the developed scale provides a reliable and valid means of assessing daily time management capabilities among working patients with diabetes, and can thus be applied to help diabetes patients to manage their daily lives.
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- 2018
15. Mllt10 knockout mouse model reveals critical role of Af10-dependent H3K79 methylation in midfacial development
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Daisuke Sakai, Honami Ogoh, Tomomi Nakao, Ayaka Yamamoto, Mai Suzuki, Lisa L. Sandell, Issay Kitabayashi, Aiko Yamashita, Kazutsune Yamagata, Naomi Tanga, Takaya Abe, and Toshio Watanabe
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0301 basic medicine ,Mesenchyme ,lcsh:Medicine ,Biology ,Bioinformatics ,Methylation ,Article ,Epigenesis, Genetic ,Histones ,Mice ,03 medical and health sciences ,0302 clinical medicine ,Gene expression ,medicine ,Animals ,Epigenetics ,lcsh:Science ,Mice, Knockout ,Regulation of gene expression ,Multidisciplinary ,lcsh:R ,Gene Expression Regulation, Developmental ,DOT1L ,Phenotype ,Cell biology ,030104 developmental biology ,medicine.anatomical_structure ,Face ,Knockout mouse ,lcsh:Q ,Protein Processing, Post-Translational ,030217 neurology & neurosurgery ,Transcription Factors - Abstract
Epigenetic regulation is required to ensure the precise spatial and temporal pattern of gene expression that is necessary for embryonic development. Although the roles of some epigenetic modifications in embryonic development have been investigated in depth, the role of methylation at lysine 79 (H3K79me) is poorly understood. Dot1L, a unique methyltransferase for H3K79, forms complexes with distinct sets of co-factors. To further understand the role of H3K79me in embryogenesis, we generated a mouse knockout of Mllt10, the gene encoding Af10, one Dot1L complex co-factor. We find homozygous Mllt10 knockout mutants (Mllt10-KO) exhibit midline facial cleft. The midfacial defects of Mllt10-KO embryos correspond to hyperterolism and are associated with reduced proliferation of mesenchyme in developing nasal processes and adjacent tissue. We demonstrate that H3K79me level is significantly decreased in nasal processes of Mllt10-KO embryos. Importantly, we find that expression of AP2α, a gene critical for midfacial development, is directly regulated by Af10-dependent H3K79me, and expression AP2α is reduced specifically in nasal processes of Mllt10-KO embryos. Suppression of H3K79me completely mimicked the Mllt10-KO phenotype. Together these data are the first to demonstrate that Af10-dependent H3K79me is essential for development of nasal processes and adjacent tissues, and consequent midfacial formation.
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- 2017
16. Lung-Derived Exosomal miR-483-3p Regulates the Innate Immune Response to Influenza Virus Infection
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Tadashi Maemura, Satoshi Fukuyama, Tiago J. S. Lopes, Yukihiko Sugita, Yoshihiro Kawaoka, Tomomi Nakao, and Takeshi Noda
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0301 basic medicine ,viruses ,Ubiquitin-Protein Ligases ,Orthomyxoviridae ,Biology ,Virus ,Proinflammatory cytokine ,Cell Line ,Tetraspanin 28 ,03 medical and health sciences ,Mice ,0302 clinical medicine ,Immune system ,Orthomyxoviridae Infections ,Interferon ,medicine ,Immunology and Allergy ,Animals ,Lung ,Innate immune system ,NF-kappa B ,Membrane Proteins ,Transfection ,respiratory system ,biology.organism_classification ,Microvesicles ,Immunity, Innate ,Mice, Inbred C57BL ,MicroRNAs ,030104 developmental biology ,Infectious Diseases ,Gene Expression Regulation ,030220 oncology & carcinogenesis ,Immunology ,Female ,Bronchoalveolar Lavage Fluid ,medicine.drug - Abstract
Exosomes regulate cell-cell communication by transferring functional proteins and RNAs between cells. Here, to clarify the function of exosomes during influenza virus infection, we characterized lung-derived exosomal microRNAs (miRNAs). Among the detected miRNAs, miR-483-3p was present at high levels in bronchoalveolar lavage fluid (BALF) exosomes during infection of mice with various strains of influenza virus, and miR-483-3p transfection potentiated gene expression of type I interferon and proinflammatory cytokine upon viral infection of MLE-12 cells. RNF5, a regulator of the RIG-I signaling pathway, was identified as a target gene of miR-483-3p. Moreover, we found that CD81, another miR-483-3p target, functions as a negative regulator of RIG-I signaling in MLE-12 cells. Taken together, this study indicates that BALF exosomal miRNAs may mediate the antiviral and inflammatory response to influenza virus infection.
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- 2017
17. Impact of heart-specific disruption of the circadian clock on systemic glucose metabolism in mice
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Sabine S. Gouraud, Hue Thi Le, Fuyuki Sato, Zaw Lin Thein, Hidefumi Waki, Masanobu Maeda, Akira Kohsaka, Tsuyoshi Otsuka, Yasuteru Muragaki, Tomomi Nakao, Hayato Ihara, and Masako Nakanishi
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0301 basic medicine ,Blood Glucose ,medicine.medical_specialty ,Time Factors ,Genotype ,Physiology ,glucose metabolism ,Circadian clock ,heart ,Carbohydrate metabolism ,Biology ,03 medical and health sciences ,0302 clinical medicine ,Insulin resistance ,Physiology (medical) ,Internal medicine ,medicine ,Animals ,Phosphorylation ,Protein kinase B ,Cells, Cultured ,Heart Failure ,Mice, Knockout ,Behavior, Animal ,Myocardium ,Skeletal muscle ,ARNTL Transcription Factors ,medicine.disease ,Circadian Rhythm ,CLOCK ,Mice, Inbred C57BL ,030104 developmental biology ,medicine.anatomical_structure ,Endocrinology ,Phenotype ,Liver ,Hyperglycemia ,Insulin Resistance ,Pancreas ,Proto-Oncogene Proteins c-akt ,030217 neurology & neurosurgery - Abstract
The daily rhythm of glucose metabolism is governed by the circadian clock, which consists of cell-autonomous clock machineries residing in nearly every tissue in the body. Disruption of these clock machineries either environmentally or genetically induces the dysregulation of glucose metabolism. Although the roles of clock machineries in the regulation of glucose metabolism have been uncovered in major metabolic tissues, such as the pancreas, liver, and skeletal muscle, it remains unknown whether clock function in non-major metabolic tissues also affects systemic glucose metabolism. Here, we tested the hypothesis that disruption of the clock machinery in the heart might also affect systemic glucose metabolism, because heart function is known to be associated with glucose tolerance. We examined glucose and insulin tolerance as well as heart phenotypes in mice with heart-specific deletion of Bmal1, a core clock gene. Bmal1 deletion in the heart not only decreased heart function but also led to systemic insulin resistance. Moreover, hyperglycemia was induced with age. Furthermore, heart-specific Bmal1-deficient mice exhibited decreased insulin-induced phosphorylation of Akt in the liver, thus indicating that Bmal1 deletion in the heart causes hepatic insulin resistance. Our findings revealed an unexpected effect of the function of clock machinery in a non-major metabolic tissue, the heart, on systemic glucose metabolism in mammals.
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- 2017
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18. Colorectal ESD training in our hospital
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Eiji Sakai, Yohei Minato, Kouichi Nonaka, Tomomi Nakao, Yasushi Matsuyama, Takashi Muramoto, Yoshitsugu Misumi, Hiromichi Tsunashima, Tomoaki Tashima, Maiko Takita, Nobuyuki Matsuhashi, and Ken Ohata
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03 medical and health sciences ,0302 clinical medicine ,business.industry ,030220 oncology & carcinogenesis ,Mechanical Engineering ,medicine ,Training (meteorology) ,Energy Engineering and Power Technology ,030211 gastroenterology & hepatology ,Medical emergency ,Management Science and Operations Research ,medicine.disease ,business - Published
- 2016
19. Massive bleeding due to rupture of a right hepatic artery pseudoaneurysm which developed after biliary EMS placement
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Tomomi Nakao, Toshio Fujisawa, Jyunichi Kazaoka, Nobuyuki Matsuhashi, Masaaki Akahane, and Koichi Kagawa
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medicine.medical_specialty ,Right hepatic artery ,business.industry ,Mechanical Engineering ,Energy Engineering and Power Technology ,Management Science and Operations Research ,medicine.disease ,Surgery ,03 medical and health sciences ,Pseudoaneurysm ,0302 clinical medicine ,030220 oncology & carcinogenesis ,Massive bleeding ,medicine ,030211 gastroenterology & hepatology ,business - Published
- 2016
20. A Highly Pathogenic Avian H7N9 Influenza Virus Isolated from A Human Is Lethal in Some Ferrets Infected via Respiratory Droplets
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Shufang Fan, Tomomi Nakao, James C. Paulson, Maki Kiso, Kosuke Takada, Kiyoko Iwatsuki-Horimoto, Yuko Sakai-Tagawa, Masato Hatta, Atsuhiro Yasuhara, Ryan McBride, Tokiko Watanabe, Yuelong Shu, Shiho Chiba, Makoto Yamashita, Mutsumi Ito, Hideki Hasegawa, Tiago J. S. Lopes, Gongxun Zhong, Yoshihiro Kawaoka, Noriko Nakajima, Kenta Takahashi, Masaki Imai, Tadashi Maemura, Shinya Yamada, Seiichiro Fujisaki, Andrew J. Thompson, Emi Takashita, Kohei Oishi, Takato Odagiri, Masayuki Shirakura, Seiya Yamayoshi, Satoshi Fukuyama, Hiromichi Mitake, Shinji Watanabe, and Gabriele Neumann
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0301 basic medicine ,viruses ,030106 microbiology ,Neuraminidase ,Biology ,Influenza A Virus, H7N9 Subtype ,Virus Replication ,Antiviral Agents ,Microbiology ,H5N1 genetic structure ,Article ,Virus ,Cell Line ,Mice ,03 medical and health sciences ,Orthomyxoviridae Infections ,Virology ,Pandemic ,Animals ,Humans ,Enzyme Inhibitors ,Lung ,Respiratory Tract Infections ,Respiratory tract infections ,Ferrets ,Brain ,Disease Models, Animal ,030104 developmental biology ,Viral replication ,Cell culture ,Influenza in Birds ,biology.protein ,Macaca ,Parasitology ,Chickens ,Conjunctiva - Abstract
Summary Low pathogenic H7N9 influenza viruses have recently evolved to become highly pathogenic, raising concerns of a pandemic, particularly if these viruses acquire efficient human-to-human transmissibility. We compared a low pathogenic H7N9 virus with a highly pathogenic isolate, and two of its variants that represent neuraminidase inhibitor-sensitive and -resistant subpopulations detected within the isolate. The highly pathogenic H7N9 viruses replicated efficiently in mice, ferrets, and/or nonhuman primates, and were more pathogenic in mice and ferrets than the low pathogenic H7N9 virus, with the exception of the neuraminidase inhibitor-resistant virus, which showed mild-to-moderate attenuation. All viruses transmitted among ferrets via respiratory droplets, and the neuraminidase-sensitive variant killed several of the infected and exposed animals. Neuraminidase inhibitors showed limited effectiveness against these viruses in vivo , but the viruses were susceptible to a polymerase inhibitor. These results suggest that the highly pathogenic H7N9 virus has pandemic potential and should be closely monitored.
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- 2017
21. Analysis of the Structure of the AVR1-CO39 Avirulence Locus in Virulent Rice-Infecting Isolates of Magnaporthe grisea
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Yukio Tosa, S. Mayama, Yukiko Eto, Tomomi Nakao, Hitoshi Nakayashiki, Sally A. Leong, and Mark L. Farman
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China ,Physiology ,Genes, Fungal ,Molecular Sequence Data ,Retrotransposon ,Locus (genetics) ,Genome ,Japan ,Magnaporthe grisea ,Gene ,Genetics ,Oryza sativa ,Base Sequence ,Geography ,Virulence ,biology ,Nucleic acid sequence ,Chromosome Mapping ,food and beverages ,Oryza ,General Medicine ,Gene rearrangement ,biology.organism_classification ,Magnaporthe ,Agronomy and Crop Science ,Brazil - Abstract
The AVR1-CO39 gene that came from a Magnaporthe grisea isolate from weeping lovegrass controls avirulence on the rice cultivar CO39. AVR1-CO39 was not present in the genome of the rice-infecting M. grisea isolate Guy11 from French Guyana, suggesting that the gene had been deleted. Molecular analysis of the deletion breakpoints in the AVR1-CO39 locus revealed the presence of a truncated copy of a previously unknown retrotransposon at the left-hand border. At the right-hand border was a truncated copy of another repetitive element that is present at multiple locations in the genome of Guy11. The structures of avr1-CO39 loci were further examined in 45 rice-infecting isolates collected in Brazil, China, Japan, India, Indonesia, Mali, and the Philippines. Most isolates showed no hybridization signal with the AVR1-CO39 probe and had the same locus structure as Guy11. Some isolates from Japan showed a signal with the AVR1-CO39 probe, but the region specifying avirulence activity was rearranged. These findings suggest that widespread virulence to ‘CO39’ among rice-infecting M. grisea isolates is due to ancestral rearrangements at the AVR1-CO39 locus that may have occurred early in the evolution of pathogenicity to rice.
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- 2002
22. Catalytic function of the mycobacterial binuclear iron monooxygenase in acetone metabolism
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Tomomi Nakao, Kuniki Kino, and Toshiki Furuya
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Iron ,Mycobacterium smegmatis ,medicine.disease_cause ,Microbiology ,Gas Chromatography-Mass Spectrometry ,Mixed Function Oxygenases ,Acetone ,chemistry.chemical_compound ,Escherichia coli ,Genetics ,medicine ,Mycobacterium goodii ,Molecular Biology ,chemistry.chemical_classification ,biology ,Chemistry ,Hydroxyacetone ,Monooxygenase ,biology.organism_classification ,Butanones ,Enzyme ,Biochemistry ,Genes, Bacterial ,Multigene Family ,Biocatalysis ,Mycobacterium - Abstract
Mycobacteria such as Mycobacterium smegmatis strain mc(2)155 and Mycobacterium goodii strain 12523 are able to grow on acetone and use it as a source of carbon and energy. We previously demonstrated by gene deletion analysis that the mimABCD gene cluster, which encodes a binuclear iron monooxygenase, plays an essential role in acetone metabolism in these mycobacteria. In the present study, we determined the catalytic function of MimABCD in acetone metabolism. Whole-cell assays were performed using Escherichia coli cells expressing the MimABCD complex. When the recombinant E. coli cells were incubated with acetone, a product was detected by gas chromatography (GC) analysis. Based on the retention time and the gas chromatography-mass spectrometry (GC-MS) spectrum, the reaction product was identified as acetol (hydroxyacetone). The recombinant E. coli cells produced 1.02 mM of acetol from acetone within 24 h. Furthermore, we demonstrated that MimABCD also was able to convert methylethylketone (2-butanone) to 1-hydroxy-2-butanone. Although it has long been known that microorganisms such as mycobacteria metabolize acetone via acetol, this study provides the first biochemical evidence for the existence of a microbial enzyme that catalyses the conversion of acetone to acetol.
- Published
- 2015
23. Carnosine and anserine ingestion enhances contribution of nonbicarbonate buffering
- Author
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YASUHIRO SUZUKI, TOMOMI NAKAO, HIROHIKO MAEMURA, MIKAKO SATO, KAZUYUKI KAMAHARA, FUMIKI MORIMATSU, and KAORU TAKAMATSU
- Subjects
Adult ,Male ,medicine.medical_specialty ,Adipokine ,Adipose tissue ,Physical Therapy, Sports Therapy and Rehabilitation ,Physical exercise ,Buffers ,Double-Blind Method ,Internal medicine ,medicine ,Animals ,Humans ,Orthopedics and Sports Medicine ,Anserine ,Analysis of Variance ,Cross-Over Studies ,Adiponectin ,Chemistry ,Leptin ,Carnosine ,Horse ,Radioimmunoassay ,Hydrogen-Ion Concentration ,Bicarbonates ,Endocrinology ,Clenbuterol ,Exercise Test ,sense organs ,Blood Gas Analysis ,Chickens ,medicine.drug - Abstract
Introduction: Adipose tissue plays complex role(s) in metabolic and endocrine control. To date, little work has been done in the horse regarding adipocytokines. Purpose: This study was conducted to determine whether therapeutic levels of chronic [beta]-agonist administration, exercise, or both could alter their concentrations. Methods: A total of 23 standard-bred mares were divided into four experimental groups: clenbuterol (2.4 [mu]g[middle dot]kg-1 bw twice daily for 8 wk) plus exercise (8 wk, 20 min[middle dot]d-1 at 50% [latin capital V with dot above]O2max; CLENEX; N = 6), clenbuterol only (CLEN; N = 6), exercise only (EX; N = 5), and control (CON; N = 6). Rump fat thickness was measured using B-mode ultrasound and percent body fat (%fat) was calculated. Plasma adiponectin and leptin concentrations were measured using radioimmunoassay (RIA). In the absence of purified equine adiponectin or leptin, results were expressed as human equivalents of immunoreactive adipocytokines. Results: The change in plasma immunoreactive (ir)-adiponectin HE concentration was negatively correlated (r = -0.520; P = 0.01) to the change in fat mass and positively correlated (r = 0.446; P = 0.03) to the change in fat-free mass. The change in plasma ir-leptin HE concentration was positively correlated (r = 0.550; P = 0.02) to the change in fat mass and negatively correlated (r = -0.473; P < 0.05) to the change in fat-free mass. Conclusion: These data demonstrate that a chronic clenbuterol administration alters the concentrations of the adipocytokines adiponectin and leptin in horses. These changes may play a role in previously reported repartitioning effects of clenbuterol.
- Published
- 2006
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