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Hyodo F, Elhelaly AE, Iwasaki R, Noda Y, Mori T, Adachi K, Tomita H, Kato H, Mori T, Matsuo M. Early Assessment of Radiation Treatment at Clinical Field Strength by D 2O Administration and Deuterium MRI. Int J Radiat Oncol Biol Phys 2023; 117:e238. [PMID: 37784942 DOI: 10.1016/j.ijrobp.2023.06.1162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) An accurate and non-invasive assessment of tumor response following treatment is essential. Traditional anatomical imaging techniques are insufficient before a significant morphological change can be observed. Metabolic imaging of molecular processes in the living body is also used. In recent years, deuterium magnetic resonance spectroscopic (MRS) imaging has been demonstrated as an alternative for cancer metabolic imaging by high-field (4-11T) MRI using deuterium-labeled molecules as a contrast agent. The study aim was to evaluate the feasibility of using deuterium MRI 1.5T for tumor visualization and early assessment of the efficacy of three anticancer treatment strategies (radiation and anticancer drugs) in pancreatic cancer model mice given heavy water (D2O) to induce deuterium (2H)-tissue labeling. MATERIALS/METHODS A MIA PaCa-2 pancreatic cancer model of six BALB/c-nu mice was prepared, and repeated deuterium MRI was performed during the first 10 days after starting free drinking of 30% D2O. We also evaluated 2H accumulation in the tumor after irradiation, bevacizumab administration, or gemcitabine administration of other 20 mice. Additional confirmatory proton MRI, ex vivo metabolic hyperpolarization 13C-MRS and histopathology were performed. RESULTS The mouse's whole-body distribution of 2H was visible 1 day after drinking, and the signal intensity increased daily. Although the tumor size did not change 1 and 3 days after irradiation, the amount of 2H in the tumor decreased significantly. The 2H image intensity of the tumor also significantly decreased after the administration of bevacizumab or gemcitabine. Metabolic hyperpolarization 13C-MRS, proton MRI and 2H-NMR spectroscopy confirmed the efficacy of the anticancer treatments. CONCLUSION Deuterium MRI at 1.5T proved feasibility to track 2H distribution throughout mouse tissues during D2O administration and revealed a higher 2H accumulation in the tumor xenografts. This research demonstrated a promising successful method for early assessment of radiotherapy and chemotherapy of pancreatic cancer.
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Affiliation(s)
- F Hyodo
- Department of Radiology Frontier Science for imaging, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - A E Elhelaly
- Department of Radiology, Gifu University, Gifu, Japan
| | - R Iwasaki
- Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Y Noda
- Department of Radiology, Gifu University, Gifu, Japan
| | - T Mori
- Gifu University School of Medicine, Department of Radiology, Gifu, Japan
| | - K Adachi
- Department of Radiology, Gifu University, Gifu, Japan
| | - H Tomita
- Gifu University, Department of Tumor Pathology, Gifu, Japan
| | - H Kato
- Department of Radiology, Gifu University, Gifu, Japan
| | - T Mori
- Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - M Matsuo
- Gifu University School of Medicine, Department of Radiology, Gifu, Japan
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Matsuo M, Hyodo F, Mori T, Hiroshi K, Iwasaki R, Takasugi N, Tomita H, Mori T. The New Quantum Image by Dynamic Nuclear Polarized MRI for the Assessment of Cardiac Radioablation to the Cavotricuspid Isthmus. Int J Radiat Oncol Biol Phys 2023; 117:e193. [PMID: 37784832 DOI: 10.1016/j.ijrobp.2023.06.1060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Cardiac arrhythmias are usually treated with invasive, time consuming catheter ablation techniques. While recently stereotactic body radiotherapy (SBRT) is an emerging non-invasive treatment in the management of cardiac arrhythmias. To identify and assess the cardiac radioablation by MR examination, including diffusion-weighted MRI, dynamic Gd-enhanced MRI, MR spectroscopy, and T2-weighted MRI early after SBRT is very difficult. We have been developing the free radical imaging methods using Dynamic Nuclear Polarization (DNP)-MRI with nitroxyl radicals as a redox probe (e.g., 4-Methacryloyloxy-2,2,6,6-tetramethylpiperidine-1-oxyl (Tempo methacrylate; TempoMC)). In this study, we examined the possibility of in vivo spatiotemporal visualization of SBRT for cardiac radioablation to the cavotricuspid isthmus (CTI) based on redox reaction by in vivo DNP-MRI. MATERIALS/METHODS All animal procedures were approved by institutional animal care and use committee and performed in full compliance with its guidelines. This study was conducted with two approaches. First, four mini pigs underwent electrophysiology assessment using electroanatomic mapping (EAM) before and 3 months after SBRT with single-fraction doses of 25 Gy. The target of CTI was defined by cardiologist. We defined the planning target volume (PTV): the internal margin (IM) + set up margin (SM) = SI 15 mm, AP 10mm, LR 10 mm were added to the target. Radiotherapy plans were created by the software used in daily clinical practice. Second, free radical imaging by low filed type of DNP-MRI was performed on the four mice before and after 25 Gy and 10 Gy irradiation to whole heart. ESR signal measurements were also performed. RESULTS A total dose of 25 Gy was successfully delivered to PTV in a single procedure in all mini pigs. EAM visualized the irradiated site and confirmed clockwise conduction block across the CTI. Although routine MRI could not detect the cardiac radiation injury clearly, the four mice of heart were well delineated on MRI and clearly visualized by DNP-MRI. DNP-MRI signal of TempoMC were decreased depending on prescribed irradiation dose. CONCLUSION These data demonstrated the safety and feasibility of SBRT for creating conduction block across the CTI in mini pigs. Although to identify and assess the irradiated site by routine MR examination was impossible, the free radical imaging methods using Dynamic Nuclear Polarization (DNP)-MRI with TempoMC could be a promising successful method for the assessment of cardiac radioablation. This new quantum image by DNP-MRI will open the possibility of treating cardiac arrhythmias by SBRT safety and noninvasively.
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Affiliation(s)
- M Matsuo
- Gifu University School of Medicine, Department of Radiology, Gifu, Japan
| | - F Hyodo
- Department of Radiology Frontier Science for imaging, Graduate School of Medicine, Gifu University, Gifu, Japan
| | - T Mori
- Gifu University School of Medicine, Department of Radiology, Gifu, Japan
| | - K Hiroshi
- Gifu University School of Medicine, Department of Radiology, Gifu, Japan
| | - R Iwasaki
- Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - N Takasugi
- Department of Cardiology, Gifu University, Gifu, Japan
| | - H Tomita
- Gifu University, Department of Tumor Pathology, Gifu, Japan
| | - T Mori
- Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
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Tezuka Y, Akao M, Suzuki S, Yamashita T, Kodani E, Tsuda T, Hayashi K, Furusho H, Sawano M, Fukuda K, Nakai M, Sasahara Y, Miyamoto Y, Tomita H, Okumura K. Usefulness of echocardiographic parameters in predicting the incidence of ischemic stroke in Japanese patients with non-valvular atrial fibrillation. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Atrial fibrillation (AF) is a risk factor for ischemic stroke (IS). We developed a novel risk score of IS (HELT-E2S2 score) in non-valvular atrial fibrillation (NVAF) patients from the combined database of 5 major AF registries in Japan. However, this score does not include echocardiographic (Echo) parameters that have been reported to be risk factors of IS, such as left atrial diameter (LAD) enlargement or increased relative wall thickness (RWT) of left ventricle (LV).
Purpose
To investigate the predictive value of Echo parameters in Japanese patients with NVAF.
Methods
After excluding patients without the Echo data, 6,032 NVAF patients were analyzed in the present study. LAD was measured in the parasternal long axis view at the end-ventricular systole. RWT was calculated as (2x posterior wall thickness)/ LV end-diastolic dimension. We compared clinical characteristics and the incidence of IS between NVAF patients divided by LAD level (High/Low LAD group) and RWT level (High/Low RWT group). To balance the follow-up period among the registries, event data from individuals whose follow-up period exceeded 730 days were excluded from the analysis.
Results
The optimal cut-off value of LAD and RWT to predict the incidence of IS with the receiver operating characteristic analysis was 43.3 mm and 0.4167, respectively. Between the High/Low LAD groups (High LAD: n=2,640 vs. Low LAD: n=3,392), age (70.3±12.1 vs. 68.3±12.5 years; p<0.001), CHA2DS2-VASc score (3.02±1.84 vs. 2.57±1.78; p<0.001), HELT-E2S2 score (2.20±1.31 vs. 1.55±1.33; p<0.001), the prescription of oral anticoagulants (OACs) (69.5 vs. 51.5%; p<0.001), LV ejection fraction (60.4±13.4 vs. 64.4±10.7%; p<0.001) and RWT (0.401±0.091 vs. 0.396±0.082; p=0.02) were significantly different. Between the High/Low RWT groups (High RWT: n=2,293 vs. Low RWT: n=3,739), percentage of female (35.6 vs. 27.8%; p<0.001), age (71.2±12.1 vs. 68.0±12.4 years; p<0.001), CHA2DS2-VASc score (3.08±1.82 vs. 2.58±1.79; p<0.001), HELT-E2S2 score (2.10±1.39 vs. 1.67±1.31; p<0.001), the prescription of OACs (62.6 vs. 57.4%; p<0.001), LV ejection fraction (65.5±9.9 vs. 60.9±13.0%; p<0.001) and LAD (43.0±8.1 vs. 42.4±8.3; p=0.004) were significantly different. In Kaplan-Meier analysis, the incidence of IS was different between the groups during the median follow-up period of 730 days (High LAD vs. Low LAD; 1.82 vs. 1.00 per 100 person-years; p<0.001, by log-rank test, High RWT vs. Low RWT; 1.86 vs. 1.06; p<0.001) (Figure). Both High LAD (hazard ratio: 1.65, 95% CI: 1.12–2.46; p=0.01) and High RWT (hazard ratio: 1.43, 95% CI: 1.01–2.04; p=0.045) were independent predictors of the incidence of IS after adjustment by the components of the HELT-E2S2 score and other clinically relevant variables including co-existing diseases, gender, and the prescription of OACs (Table).
Conclusion
Echo parameters, LAD and RWT, were independently associated with the incidence of IS among Japanese patients with NVAF.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Japan Agency for Medical Research and Development
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Affiliation(s)
- Y Tezuka
- Mitsubishi Kyoto Hospital , Kyoto , Japan
| | - M Akao
- Kyoto Medical Center, Department of Cardiology , Kyoto , Japan
| | - S Suzuki
- Cardiovascular Institute, Department of Cardiovascular Medicine , Tokyo , Japan
| | - T Yamashita
- Cardiovascular Institute, Department of Cardiovascular Medicine , Tokyo , Japan
| | - E Kodani
- Nippon Medical School Hospital, Department of Internal Medicine and Cardiology , Tokyo , Japan
| | - T Tsuda
- Kanazawa University Graduate School of Medicine, Department of Cardiovascular Medicine , Kanazawa , Japan
| | - K Hayashi
- Kanazawa University Graduate School of Medicine, Department of Cardiovascular Medicine , Kanazawa , Japan
| | - H Furusho
- Kanazawa University, Department of Cardiovascular Medicine , Kanazawa , Japan
| | - M Sawano
- Keio University School of Medicine, Department of Cardiovascular Medicine , Tokyo , Japan
| | - K Fukuda
- Keio University School of Medicine, Department of Cardiovascular Medicine , Tokyo , Japan
| | - M Nakai
- National Cerebral & Cardiovascular Center, Center for Cerebral and Cardiovascular Disease Information , Suita , Japan
| | - Y Sasahara
- National Cerebral & Cardiovascular Center, Center for Cerebral and Cardiovascular Disease Information , Suita , Japan
| | - Y Miyamoto
- National Cerebral & Cardiovascular Center, Center for Cerebral and Cardiovascular Disease Information , Suita , Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Department of Cardiology , Hirosaki , Japan
| | - K Okumura
- Hirosaki University Graduate School of Medicine, Department of Cardiology , Hirosaki , Japan
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Owe SRH, Kuvvetli I, Cherlin A, Harris B, Tomita H, Baistow I, Tcherniak D, Budtz-Jorgensen C. Evaluation of CZT Drift Strip Detectors for use in 3D Molecular Breast Imaging. IEEE Trans Radiat Plasma Med Sci 2022. [DOI: 10.1109/trpms.2022.3220807] [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: 11/11/2022]
Affiliation(s)
- S. R. H. Owe
- DTU Space at the Technical University of Denmark, Kongens Lyngby, Denmark
| | - I. Kuvvetli
- DTU Space at the Technical University of Denmark, Kongens Lyngby, Denmark
| | - A. Cherlin
- Kromek UK, Thomas Wright Way, Sedgefield, UK
| | | | | | - I. Baistow
- Kromek UK, Thomas Wright Way, Sedgefield, UK
| | - D. Tcherniak
- DTU Space at the Technical University of Denmark, Kongens Lyngby, Denmark
| | - C. Budtz-Jorgensen
- DTU Space at the Technical University of Denmark, Kongens Lyngby, Denmark
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Heianna J, Makino W, Hirakawa H, Yamashita Y, Tomita H, Murayama S. Therapeutic efficacy of intra-arterial docetaxel and nedaplatin infusion concomitant with radiotherapy for T4 maxillary sinus squamous cell carcinoma. Int J Oral Maxillofac Surg 2021; 51:1123-1130. [PMID: 34955352 DOI: 10.1016/j.ijom.2021.12.006] [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: 03/22/2021] [Revised: 08/10/2021] [Accepted: 12/09/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to evaluate the efficacy of intra-arterial chemoradiotherapy with docetaxel and nedaplatin for T4 maxillary sinus squamous cell carcinoma (MSSCC). Data were retrospectively analysed for 22 consecutive patients with T4 MSSCC who underwent intra-arterial chemoradiotherapy. Participants received intensity-modulated radiotherapy (70 Gy in 35 fractions) concomitantly with docetaxel (60 mg/m2) and nedaplatin (80 mg/m2) administered every 4 weeks for a total of three sessions. The median follow-up period was 49 months (range 12-91 months). T4a tumours were found in 16 patients (73%) and T4b tumours in six patients (27%). Cervical metastasis was found in nine patients (41%; five N2b, four N2c). The 5-year loco-regional control, disease-free survival, and overall survival rates for patients with T4a disease were 92.3%, 92.3%, and 90.3%, respectively, compared to 83.3% (P = 0.42), 66.7% (P = 0.07), and 83.3% (P = 0.46), respectively, for those with T4b disease. The 5-year loco-regional control, disease-free survival, and overall survival rates for patients with cervical lymph node metastasis were all 87.5% compared to 92.3% (P = 0.86), 84.6% (P = 0.69), and 92.3% (P = 0.93), respectively, for those without cervical metastasis. Intra-arterial chemoradiotherapy with docetaxel and nedaplatin may provide favourable loco-regional control and increased survival in T4 MSSCC.
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Affiliation(s)
- J Heianna
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan.
| | - W Makino
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - H Hirakawa
- Department of Otorhinolaryngology, Head and Neck Surgery, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Y Yamashita
- Department of Otorhinolaryngology, Head and Neck Surgery, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - H Tomita
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan; Department of Radiology, St Marianna University School of Medicine, Miyamae, Kawasaki, Kanagawa, Japan
| | - S Murayama
- Department of Radiology, Graduate School of Medical Science, University of the Ryukyus, Nishihara, Okinawa, Japan
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Umeda T, Minemura H, Tanino Y, Hirai K, Koizumi T, Nikaido T, Sato Y, Togawa R, Kawamata T, Watanabe N, Tomita H, Rikimaru M, Morimoto J, Suzuki Y, Uematsu M, Fukuhara N, Fukuhara A, Saito J, Kanazawa K, Shibata Y. P44.02 Mild Interstitial Pneumonia as a Risk Factor for Chemotherapy-Induced Acute Exacerbation of Interstitial Pneumonia in Patients with Lung Cancer. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.841] [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: 10/21/2022]
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Koyasu N, Hyodo F, Shoda S, Iwasaki R, Tomita H, Masaki T, Mori T, Matsuo M. Noninvasive Redox Imaging of Tumor Redox Status for Early Detection of Radiation Response using In Vivo DNP-MRI. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Shibutani S, Yonekura M, Nosaka M, Kawamura Y, Hanada K, Kasai S, Yokota T, Higuma T, Itoh K, Tomita H. Characterizing genetic variants for DAG and IP3 signalling pathways in severe cases of coronary spastic angina. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
We previously reported that the activity of phospholipase C (PLC), a key molecule for intracellular calcium signaling, was enhanced in patients with coronary spastic angina (CSA). Furthermore, we found PLC-δ1 864 G to A mutation in about 10% of the male CSA patients. However, comprehensive understanding of genetic role in the pathogenesis of CSA remains to be elucidated.
Purpose
We tested the hypothesis that variants in the genes responsible for contraction signaling, especially a Ca2+-dependent mechanism, plays an important role in the pathogenesis of CSA.
Methods and results
Exome sequencing was performed to genotype comprehensively CSA cohort, enabling investigation of 258 gene network for diacylglycerol (DAG) and inositol trisphosphate (IP3) signallings, which are responsible for contraction signaling in the vascular smooth muscle cell (VSMC) by a Ca2+-dependent mechanism.
The study population included 30 Japanese patients with severe cases of CSA (18 men and 12 women with a mean age of 62.2±10.1 years). In 23 patients, ST segment elevation was recorded on the electrocardiogram during a spontaneous attack. In other 3 patients, ventricular fibrillation occurred following CSA attacks. The rests were diagnosed by ECG changes and elevated cardiac enzymes following CSA attacks. Genetic information from these CSA patients were compared with those from 914 healthy controls.
Frequencies of 17 common, functional polymorphisms of DAG and IP3 signallings were statistically similar to those of healthy controls. By high-quality (Call Quality ≥20, Read Depth ≥10), and predicted-deleterious (CADD score ≥20) filterings, the number of the candidate genes were narrowed from 234,445 to 17,738, and by selecting genes for DAG and IP3 signallings, further narrowed to 208 genes. Compared with 914 healthy controls, DAG and IP3 signalling genes revealed 26 variants in 15 genes in CSA cases, and by further filtering for rare (914 healthy control frequency <1%), 21 variants in 12 genes were found. They shared variants in G protein subunit alpha q (GNAQ), phospholipase C beta 3 (PLCB3), inositol 1,4,5-trisphosphate receptor type 3 (ITPR3), glutamate ionotropic receptor NMDA type subunit 2D (GRIN2D) in ≥5 cases. By filtering for high-quality, predicted-deleterious, and rare, genetic variants related with DAG and IP3 signalling were more found in severe CSA patients compared with healthy controls (CSA 4.33/person vs healthy controls 2.60 /person).
Conclusions
These findings indicate genetic heterogeneity in CSA susceptibility and a likely polygenic basis, giving a cumulative effect on DAG and IP3 signalling pathways in a subset of individual CSA patients. Study of larger cohorts is warranted to define genetic risk factors for CSA.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- S Shibutani
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Yonekura
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Nosaka
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Y Kawamura
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - K Hanada
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - S Kasai
- Hirosaki University, Stress Response Science, Hirosaki, Japan
| | - T Yokota
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Higuma
- St. Marianna University School of Medicine, Cardiology, Kawasaki, Japan
| | - K Itoh
- Hirosaki University, Stress Response Science, Hirosaki, Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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Takabatake T, Tomita H, Okada S, Hayashi N, Masuko T, Toyota M. Anticancer agent synthesis designed by artificial intelligence: Pd(OAc)2-catalyzed one-pot preparation of biphenyls and its application to a concise synthesis of various diazofluorenes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Sonnenschein V, Tsuji Y, Kokuryu S, Kubo W, Suzuki S, Tomita H, Kiyanagi Y, Iguchi T, Matsushita T, Wada N, Kitaguchi M, Shimizu HM, Hirota K, Shinohara T, Hiroi K, Hayashida H, Guo W, Ito D, Saito Y. An experimental setup for creating and imaging 4He 2 * excimer cluster tracers in superfluid helium-4 via neutron- 3He absorption reaction. Rev Sci Instrum 2020; 91:033318. [PMID: 32259963 DOI: 10.1063/1.5130919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 02/29/2020] [Indexed: 06/11/2023]
Abstract
For the purpose of future visualization of the flow field in superfluid helium-4, clusters of the triplet state excimer 4He2 * are generated along the micro-scale recoil tracks of the neutron-absorption reaction n + 3He → 3T + p. This reaction is induced by neutron irradiation of the 3He fraction contained in natural isotopic abundance liquid helium with neutron beams either from the Japan Proton Accelerator Research Complex, Materials and Life Science Experimental Facility (JPARC)/Materials and Life Science Experimental Facility or from the Kyoto University Institute for Integrated Radiation and Nuclear Science. These 4He2 * clusters are expected to be ideal tracers of the normal-fluid component in superfluid helium with several advantageous properties. Evidence of the excimer generation is inferred by detection of laser induced fluorescence emitted from the 4He2 * clusters excited by a purpose-built short pulse gain-switched titanium:sapphire (Ti:sa) laser operating at a wavelength of 905 nm. The setup and performance characteristics of the laser system including the Ti:sa and two continuous wave re-pumping lasers are described. Detection at the fluorescence wavelength of 640 nm is performed by using optical bandpass filtered photomultiplier tubes (PMT). Electrical noise in the PMT acquisition traces could successfully be suppressed by post-processing with a simple algorithm. Despite other laser-related backgrounds, the excimer was clearly identified by its fluorescence decay characteristics. Production of the excimer was found to be proportional to the neutron flux, adjusted via insertion of different collimators into the neutron beam. These observations suggest that the apparatus we constructed does function in the expected manner and, therefore, has the potential for groundbreaking turbulence research with superfluid helium.
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Affiliation(s)
- V Sonnenschein
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Y Tsuji
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - S Kokuryu
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - W Kubo
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - S Suzuki
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - H Tomita
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Y Kiyanagi
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - T Iguchi
- Department of Energy Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - T Matsushita
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - N Wada
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - M Kitaguchi
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - H M Shimizu
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hirota
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - T Shinohara
- Department of Physics, Nagoya University, Nagoya, Aichi 464-8602, Japan
| | - K Hiroi
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - H Hayashida
- Comprehensive Research Organization for Science and Society, Tokai, Ibaraki 319-1106, Japan
| | - W Guo
- National High Magnetic Field Laboratory, Tallahassee, Florida 32310, USA
| | - D Ito
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
| | - Y Saito
- Institute for Integrated Radiation and Nuclear Science, Kyoto University, Kumatori, Osaka 590-0494, Japan
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Murakami H, Tomita H, Aoyanagi T, Sugita T, Miki Y, Esaka Y, Inoue Y, Teshima N. Effects of pendant-like hydrophilic monomers on the adsorption properties of reversed-phase-type sorbents for solid-phase extraction. Anal Chim Acta 2019; 1075:106-111. [PMID: 31196415 DOI: 10.1016/j.aca.2019.05.019] [Citation(s) in RCA: 4] [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: 03/28/2019] [Revised: 04/26/2019] [Accepted: 05/09/2019] [Indexed: 10/26/2022]
Abstract
Solid-phase extraction (SPE) has been extensively employed as a pretreatment method. In SPE, reversed-phase-type sorbents have been widely applied for the pretreatment of environmental or biological samples. Hydrophilic-lipophilic balance (HLB)-type sorbents, constituting the copolymers used as reversed-phase-type sorbents, have been applied for various sample pretreatment methods. In HLB-type sorbents, the hydrophilic monomer contributes to the improved wettability of sorbents and increase of polar interactions. In this study, three pendant-like hydrophilic monomers, viz. N-vinylpyrrolidone (NVP), 4-acryloylmorpholine (AMO), and 4-vinyl-1,3-dioxolan-2-one (VDO), respectively, exhibiting different Log P values and possibly causing different polar interactions, were selected to improve the adsorption properties of polar compounds, and divinylbenzene (DVB)-based HLB-type sorbents containing each hydrophilic monomer were synthesized and examined. By the optimization of the molar ratio of DVB and the hydrophilic monomer (i.e. HLB), the inert diluent, and the degree of cross-linking, the developed sorbents exhibited higher recoveries for various polar compounds (viz. cytosine, uracil, cytidine, uridine, 2'-deoxycytidine, 2'-deoxyguanosine, adenine, thymidine, adenosine, and 2'-deoxyadenosine) compared to commercially available HLB-type sorbents.
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Affiliation(s)
- Hiroya Murakami
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan
| | - Hiroki Tomita
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan
| | - Takuya Aoyanagi
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan
| | - Takashi Sugita
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan
| | - Yuta Miki
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan
| | - Yukihiro Esaka
- Gifu Pharmaceutical University, Daigaku-nishi, Gifu, 501-1196, Japan
| | - Yoshinori Inoue
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan
| | - Norio Teshima
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota, 470-0392, Japan.
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12
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Kato T, Higuma T, Yokota T, Kudo N, Yokono Y, Senoo M, Narita N, Endo T, Nishizaki F, Shibutani S, Hanada K, Tomita H. P856Incidence and Outcomes of irregular protrusion after stent implantation in patients with acute myocardial infarction: An in in vivo optical coherence tomography study. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Irregular protrusion, a protrusion of material with an irregular surface into the lumen of the vessel after stent implantation, can only be identified by optical coherence tomography (OCT). A previous study demonstrated that irregular protrusion after stent implantation was an independent predictor of 1-year major adverse cardiac events (MACE) in CAD patients. However, the true incidence and prognostic significance of irregular protrusion after stenting in patients with ST-segment elevation myocardial infarction (STEMI) have not previously examined.
Aims
The aims of this study were the following: 1) to evaluate the incidence of irregular protrusion detected by OCT in STEMI patients after stenting; and 2) to compare the long-term outcomes between patients with and without irregular protrusion.
Methods and results
A total of 210 STEMI patients who had post-procedure OCT imaging after coronary stenting within 12 hours after symptom onset were studied. We divided them into two groups: those with irregular protrusion (n=159) and those without (n=51) after stenting. There were no significant differences in baseline characteristics between the 2 groups except that peak CK-MB levels were higher in patients with irregular protrusion than those without (289 (137–563) vs. 260 (63–349) U/L, p<0.05). During mean follow-up period of 298 days, the overall incidence of MACE defined as cardiac death, target vessel-related myocardial infarction, and target lesion revascularization was 15.3%. Kaplan-Meier curve showed that the incidence of MACE did not differ between patients with and without irregular protrusion (14.7% vs. 17.7%, p=0.53 by Log-rank).
Conclusions
Irregular protrusion after stent implantation was detected in three-fourth of STEMI patients. Although patients with irregular protrusion had a greater myocardial damage, it did not influence clinical outcomes.
Acknowledgement/Funding
Donation course from Abbott Japan
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Affiliation(s)
- T Kato
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Higuma
- St. Marianna University, Cardiology, Kawasaki, Japan
| | - T Yokota
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - N Kudo
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Y Yokono
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Senoo
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - N Narita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Endo
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - F Nishizaki
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - S Shibutani
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - K Hanada
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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13
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Akao M, Ogawa H, Suzuki S, Yamashita T, Kodani E, Tsuda T, Hayashi K, Furusho H, Sawano M, Fukuda K, Nakai M, Miyamoto Y, Tomita H, Okumura K. P3755Left atrial enlargement as an independent risk factor for ischemic stroke in Japanese atrial fibrillation patients: pooled analysis of five major Japanese atrial fibrillation registries. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Atrial fibrillation (AF) increases the risk of ischemic stroke. It remains unknown whether left atrial diameter determined by routine trans-thoracic echocardiography is a risk factor for ischemic stroke in non-valvular AF (NVAF) patients.
Purpose
The aim of this study is to investigate the impact of left atrial enlargement (LAE) on the incidence of ischemic stroke in a large-scale cohort of Japanese NVAF patients.
Methods
We combined the data of 5 major AF registries in Japan, J-RHYTHM Registry, Fushimi AF Registry, Shinken Database, Keio interhospital Cardiovascular Studies, and Hokuriku AF Registry. After excluding patients without echocardiographic data, 7,672 NVAF patients were analyzed in the present study (mean age, 69.3±12.3 years; mean CHADS2 score, 1.6±1.3). We compared clinical characteristics and the incidence of ischemic stroke between NVAF patients with LAE (left atrial diameter >45 mm; LAE group) and those without (non-LAE group).
Results
The mean left atrial diameter was 43.1±8.6 mm, and the LAE group accounted for 40.0% (n=3,066) of the entire cohort. Compared with non-LAE group (60.0%, n=4,606), the LAE group was older (LAE vs. non-LAE; 70.3±12.0 vs. 68.0±12.5, p<0.01), more often non-paroxysmal type (73.7% vs. 32.1%, p<0.01), had higher CHADS2 (1.86±1.34 vs. 1.46±1.29, p<0.01) and CHA2DS2-VASc (3.02±1.83 vs. 2.53±1.78, p<0.01) scores, and more frequently received oral anticoagulant (72.9% vs. 55.0%, p<0.01).
During the median follow-up period of 774.5 days (interquartile range: 567–1466 days), ischemic stroke occurred in 241 patients (131 vs. 110 patients; 1.52 vs. 0.82 per 100 person-years). In Kaplan Meier analysis, LAE was associated with a higher incidence of ischemic stroke (unadjusted hazard ratio (HR): 1.83, 95% confidence interval (CI): 1.42–2.36; log rank p<0.01) (Figure). LAE was independently associated with increased risk of ischemic stroke (adjusted HR: 1.63, 95% CI: 1.25–2.11; p<0.01) after adjustment by the components of CHADS2 score and the use of oral anticoagulant, on multivariate Cox proportional hazard analysis.
Conclusion
In this large-scale cohort of Japanese patients with AF, LAE was an independent predictor of ischemic stroke, suggesting that this simple echocardiographic parameter could refine thromboembolic risk stratification of NVAF patients.
Acknowledgement/Funding
Japan Agency for Medical Research and Development, AMED
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Affiliation(s)
- M Akao
- Kyoto Medical Center, National Hospital Organization, Kyoto, Japan
| | - H Ogawa
- Kyoto Medical Center, National Hospital Organization, Kyoto, Japan
| | - S Suzuki
- Cardiovascular Institute, Tokyo, Japan
| | | | - E Kodani
- Nippon Medical School, Tama-Nagayama Hospital, Tama, Japan
| | - T Tsuda
- Kanazawa University Graduate School of Medicine, Kanazawa, Japan
| | - K Hayashi
- Kanazawa University Graduate School of Medicine, Kanazawa, Japan
| | - H Furusho
- Kanazawa University Graduate School of Medicine, Kanazawa, Japan
| | | | | | - M Nakai
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Y Miyamoto
- National Cerebral and Cardiovascular Center, Osaka, Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - K Okumura
- Saiseikai Kumamoto Hospital, Kumamoto, Japan
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14
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Toyama Y, Yonekura M, Tomita H, Murakami M. P2565Decreased cardiac pacemaking and attenuated beta-adrenergic response in tric-a knock-out mice. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Trimeric intracellular cation (TRIC) channels are expressed on the surface of the sarcoplasmic reticulum and compensate for calcium release from ryanodine receptors. Tric-a knock-out (KO) mice showed diminished calcium release from ryanodine receptors in vascular smooth muscle cells. The cardiac pacemaker is controlled by the surface membrane and intracellular calcium clocks. In spontaneously firing sinus node action potentials, the membrane and calcium clocks work together via numerous interactions modulated by membrane voltage, intracellular calcium release, and protein phosphorylation. Intracellular calcium changes modulate cardiac pacemaking in the sinus node, but the physiological importance of TRIC channels in cardiac rhythm formation is still obscure.
Purpose
In this study, we aimed to clarify the importance of TRIC channels on cardiac pacemaking using Tric-a KO mice.
Methods
The expression level of mRNA and proteins in the sinus node was examined by RT-PCR and immunoblotting. Systolic blood pressure was measured with tail-cuff method. Heart rate was measured by ECG, and heart rate variability was examined. The atrial contractile force from isolated hearts was measured with a force transducer. Cardiac action potential and spontaneous sinus rate from isolated hearts were measured with a microelectrode. Isoproterenol was used for sympathetic nerve manipulation.
Results
Tric-a KO heart showed increased adrenergic β1-receptor expression in immunoblotting. Although there was no significant difference in basal systolic blood pressure between Tric-a KO and wild type (WT) mice, basal heart rate in Tric-a KO mice was significantly lower than that in WT mice (660±10 and 698±10 bpm, n=15 and 19, Tric-a KO mice and WT mice, respectively, p=0.017). Tric-a KO mice showed limited heart rate changes to isoproterenol (24±6 and 99±15 bpm, n=9 and 10, Tric-a KO mice and WT mice, respectively, p<0.001). In the action potential recordings, Tric-a KO atria showed only limited sinus rate changes to isoproterenol (35±9 and 71±10 bpm, n=8 and 6, Tric-a KO mice and WT mice, respectively, p=0.038). WT mice and Tric-a KO mice atrial contractile force showed dose-dependent changes in response to isoproterenol (10–100 nM), but Tric-a KO mice atria showed limited contractile force changes to isoproterenol (116 and 169%, n=7 and 6, Tric-a KO mice and WT mice, respectively, p<0.01). In heart rate variability, Tric-a KO mice showed unstable RR intervals and longer standard deviation of RR intervals than WT mice.
Conclusion
Tric-a KO mice showed decreased cardiac pacemaking in the sinus node and attenuated responses to beta-adrenergic stimulus, which indicates the involvement of TRIC channels in cardiac rhythm formation and sympathetic nerve regulation.
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Affiliation(s)
- Y Toyama
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Yonekura
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Murakami
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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15
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Yokono Y, Narita M, Kawamura Y, Kato T, Kudo N, Tsushima M, Toyama Y, Hanada K, Shimada M, Makoto T, Osanai T, Tomita H. P1624Blockade of protease activated receptor-1 signaling attenuates cardiac hypertrophy and fibrosis in renin-overexpressing hypertensive mice. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Recent evidences have demonstrated that coagulation pathway is involved in cardiovascular remodeling induced by renin-angiotensin system (RAS), which finally leads to heart failure. Protease activated receptor-1 (PAR-1) is widely expressed in the vasculature and the heart, and plays important roles in pro-inflammatory process in the cardiovascular system. Recently, we demonstrated that the activity of factor Xa (FXa), which functions not only as a coagulation factor but as an agonist for PAR-1, was enhanced in renin-overexpressing hypertensive mice (Ren-Tg).
Purpose
The purpose of this study was to investigate whether inhibition of PAR-1 signaling has protective effects on the progression of heart failure induced by chronic RAS activation in Ren-Tg.
Methods and results
We treated 12–16 weeks-old male wild type mice (WT) and Ren-Tg with continuous subcutaneous infusion of PAR-1 antagonist SCH79797 (25mg/kg/day) or vehicle for 4 weeks. After treatment period, left ventricular (LV) wall thickness calculated as interventricular septum plus posterior wall thickness measured by echocardiography was greater in Ren-Tg than in WT (0.25±0.003 versus 0.18±0.002 mm), and SCH79797 attenuated the increase to 0.22±0.01 mm in Ren-Tg (both p<0.05, respectively). The ratio of heart weight to body weight was greater in Ren-Tg than in WT (6.1±0.4 versus 4.6±0.7 mg/g), and SCH79797 attenuated the increase to 5.2±0.1 mg/g (both p<0.05). The area of cardiac fibrosis evaluated by Masson-trichrome staining was greater in Ren-Tg than in WT (2.6±0.2 versus 1.4±0.3%), and SCH79797 attenuated it to 1.6±0.3% in Ren-Tg (both p<0.05). Cardiac mRNA expressions of tumor necrosis factor-α, transforming growth factor-β1, and β-myosin heavy chain were all greater in Ren-Tg than in WT, and SCH79797 attenuated the increases in Ren-Tg (all p<0.05).
Conclusions
Inhibition of PAR-1 signaling attenuates cardiac hypertrophy and fibrosis in Ren-Tg via inhibition of inflammatory cytokines production. These results support the involvement of PAR signaling in the development of heart failure induced by RAS, and may provide novel therapeutic insights for the treatment of hypertensive heart failure.
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Affiliation(s)
- Y Yokono
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Narita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Y Kawamura
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Kato
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - N Kudo
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Tsushima
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Y Toyama
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - K Hanada
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Shimada
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Makoto
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Osanai
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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16
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Tanaka H, Kawaguchi M, Takano H, Shoda S, Miyoshi T, Iwasaki R, Hyodo F, Tomita H, Mori T, Hara A, Matsuo M. Activation of the Wnt/β-Catenin Signaling Pathway Causes Radioresistance in Colon Cancer. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1008] [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]
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17
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Kitanosono H, Motomura M, Tomita H, Iwanaga H, Iwanaga N, Irioka T, Shiraishi H, Tsujino A. [Paraneoplastic Cerebellar Degeneration with Lambert-Eaton Myasthenic Syndrome: A Report of an Effectively Treated Case and Systematic Review of Japanese Cases]. Brain Nerve 2019; 71:167-174. [PMID: 30718446 DOI: 10.11477/mf.1416201237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A 63-year-old female who developed dizziness, diplopia and subsequent gait disturbance from September X-1 year was analyzed. The first neurological findings in May X year revealed cerebellar ataxia, weakness in the proximal limbs, decreased tendon reflexes, and autonomic symptoms (ADL:mRS 3). Furthermore, an incremental phenomenon was observed in the repetitive nerve stimulation test, and she was diagnosed with Lambert-Eaton myasthenic syndrome (LEMS) based on the serum P/Q-type calcium channel (VGCC) antibody positivity. In addition, small cell lung cancer was detected by chest CT and bronchoscopy, and her cerebellar ataxia was diagnosed as paraneoplastic cerebellar degeneration (PCD). Therefore, the patient underwent chemotherapy and radiotherapy from June in X year. Six months after initiation of treatment, her cerebellar ataxia had almost disappeared and she could walk without assistance (ADL:mRS 1). The P/Q-type VGCC antibodies were also negative at that time. Cases wherein cerebellar ataxia resolved almost completely in parallel with disappearance of the serum P/Q-type VGCC antibodies are of great interest. We conducted a systematic literature review of PCD-LEMS cases in Japan reported since P/Q-type calcium channel antibody measurement was reported in 1995. As a result, 13 cases (including our study) that concurrently displayed cerebellar ataxia and LEMS were selected. The average age of the 13 patients (10 males and 3 females) was 61.5 years. Small cell carcinoma was complicated in 11 patients (10 in the lung and 1 in the oropharynx); in the other 2 patients, cancer was not found at the time of reporting (the observation period was as short as 1-2 months). The time from onset to treatment ranged between 1 week and 10 months. While 1 of the 13 patients developed cerebellar ataxia during the subsequent course of the treatment, the remaining 12 had already developed cerebellar ataxia and LEMS symptoms, although their main neurologic finding was cerebellar ataxia and they were subsequently diagnosed with LEMS after electrophysiological testing and autoantibody detection. Small cell carcinoma was found in 11 patients. We define the pathology following such a certain clinical course as PCD-LEMS. The P/Q-type VGCC antibodies were positive in 11 of the 13 cases, although their antibody titers were not necessarily very high. Treatment for the associated small cell carcinoma might have improved the neurological findings in 9 of the 11 PCD-LEMS patients. The P/Q-type VGCC antibodies were measured before and after the treatment. The PCD-LEMS symptoms improved in all patients and their antibody titers decreased. These findings indicate that P/Q-type VGCC antibodies are involved in the pathology of PCD-LEMS. Appropriate and timely treatment, at least in PCD-LEMS patients in Japan, that actively treats any associated cancer can be expected to improve not only life prognosis but also cerebellar ataxia. (Received October 15, 2018; Accepted November 5, 2018; Published January 1, 2019).
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Affiliation(s)
- Hiroko Kitanosono
- Department of Neurology and Strokology, Nagasaki University Hospital
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18
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Narita M, Hanada K, Yokono Y, Narita N, Senoo M, Kimura Y, Ichikawa H, Shimada M, Tanaka M, Osanai T, Okumura K, Tomita H. P938A direct factor Xa inhibitor, rivaroxaban, attenuates cardiac hypertrophy and fibrosis in renin-overexpressing hypertensive mice. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy564.p938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- M Narita
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - K Hanada
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - Y Yokono
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - N Narita
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - M Senoo
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - Y Kimura
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - H Ichikawa
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - M Shimada
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - M Tanaka
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
| | - T Osanai
- Hirosaki University, Graduate School of Health Sciences, Hirosaki, Japan
| | - K Okumura
- Saiseikai Kumamoto Hospital, Cardiology, Kumamoto, Japan
| | - H Tomita
- Hirosaki University Graduate School of Medicine, Cardiology and Nephrology, Hirosaki, Japan
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19
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Murakami H, Aoyanagi T, Miki Y, Tomita H, Esaka Y, Inoue Y, Teshima N. Effects of hydrophilic monomers on sorptive properties of divinylbenzene-based reversed phase sorbents. Talanta 2018; 185:427-432. [PMID: 29759223 DOI: 10.1016/j.talanta.2018.03.093] [Citation(s) in RCA: 8] [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: 01/05/2018] [Revised: 03/28/2018] [Accepted: 03/28/2018] [Indexed: 11/19/2022]
Abstract
Solid phase extraction (SPE) has been extensively used as a pretreatment method. In SPE methods, commercially available reversed phase type sorbents, which consist of macroporus styrene-divinylbenzene or copolymers including divinylbenzene (DVB) and hydrophilic monomers, have been applied to a variety of samples. The later sorbents are called hydrophilic lipophilic balanced (HLB) type sorbents. Hydrophilic monomers in hydrophilic lipophilic balanced type sorbents contribute to the increase in retention of polar compounds, because hydrophilic monomers improve the wettability and increase the interaction with polar compounds as analytes. In this study, three different methacrylate monomers (ethylene glycol dimethacrylate (EGDMA), glycerol dimethacrylate (GDMA) and trimethylolpropane trimethacrylate (TMPTMA)), which are expected to improve the retention of polar compounds, were chosen, and DVB-based copolymetric sorbents including the three monomers were newly synthesized. Among them, the sorbents including GDMA or TMPTMA gave higher recoveries to polar compounds such as uridine and adenine than that including EGDMA. The optimization studies of hydrophilic lipophilic balance, inert diluent and the purity of DVB improved the sorptive abilities of the sorbents. The developed sorbents have higher recoveries for variety of polar compounds (cytosine, uracil, cytidine, uridine, 2'-deoxycytidine, 2'-deoxyguanosine, adenine, thymidine, adenosine and 2'-deoxyadenosine) than commercially available hydrophilic lipophilic balanced type sorbents, while the recoveries for theophylline were comparable between the proposed sorbents and the commercial sorbents.
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Affiliation(s)
- Hiroya Murakami
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
| | - Takuya Aoyanagi
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
| | - Yuta Miki
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
| | - Hiroki Tomita
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
| | - Yukihiro Esaka
- Gifu Pharmaceutical University, Daigaku-nishi, Gifu 501-1196, Japan
| | - Yoshinori Inoue
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan
| | - Norio Teshima
- Department of Applied Chemistry, Aichi Institute of Technology, 1247 Yachigusa, Yakusa-cho, Toyota 470-0392, Japan.
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20
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Kido K, Hatakeyama S, Hamano I, Yamamoto H, Imai A, Yoneyama T, Hashimoto Y, Koie T, Fujita T, Murakami R, Tomita H, Suzuki T, Narumi S, Ohyama C. Partial Cystectomy of Paraganglioma of the Urinary Bladder Before Living Kidney Transplantation: Case Report. Transplant Proc 2018; 50:898-901. [PMID: 29661460 DOI: 10.1016/j.transproceed.2018.01.015] [Citation(s) in RCA: 3] [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] [Received: 01/15/2018] [Accepted: 01/29/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND Paraganglioma (extra-adrenal pheochromocytoma) of the bladder is a very rare disease, accounting for 0.06% of all bladder tumors. Optimal management of bladder paraganglioma before kidney transplantation is unknown. We report a case of partial cystectomy for urinary bladder paraganglioma before living kidney transplantation. CASE PRESENTATION A 59-year-old man with a 27-year history of hemodialysis was referred to our department for further examination of a bladder tumor detected during pre-transplantation testing. Cystoscopy revealed a submucosal tumor on the right side of the bladder. The patient experienced a hypertensive crisis during transurethral resection of the bladder tumor. Endocrinologic and pathologic examinations confirmed the diagnosis of paraganglioma in the urinary bladder. A partial cystectomy was performed before kidney transplantation. Nine months after partial cystectomy, the patient underwent AB0-incompatible living kidney transplantation from his spouse. No disease recurrence or graft rejection was observed 12 months after the transplantation. CONCLUSIONS To our knowledge, this is the 1st report on the management of paraganglioma in the urinary bladder before living kidney transplantation. Kidney transplantation after partial cystectomy is an option that may be considered in patients with paraganglioma of the urinary bladder, with careful observations of bladder function and vesicoureteral reflux to the grafts.
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Affiliation(s)
- K Kido
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - S Hatakeyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.
| | - I Hamano
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - H Yamamoto
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - A Imai
- Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Yoneyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Y Hashimoto
- Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Koie
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Fujita
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - R Murakami
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - H Tomita
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Suzuki
- Department of Urology, Oyokyo Kidney Research Institute, Hirosaki, Japan
| | - S Narumi
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - C Ohyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan; Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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Hamano I, Hatakeyama S, Yamamoto H, Fujita T, Murakami R, Shimada M, Imai A, Yoneyama T, Yoneyama T, Hashimoto Y, Koie T, Narumi S, Saitoh H, Suzuki T, Tomita H, Ohyama C. Condyloma Acuminata of the Urethra in a Male Renal Transplant Recipient: A Case Report. Transplant Proc 2018; 50:2553-2557. [PMID: 30316397 DOI: 10.1016/j.transproceed.2018.02.182] [Citation(s) in RCA: 4] [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] [Received: 12/25/2017] [Accepted: 02/19/2018] [Indexed: 12/23/2022]
Abstract
BACKGROUND Condyloma acuminatum (CA) is a common sexually transmitted disease associated with human papilloma virus (HPV). CA occurring in the urethra is rare and has not been reported in male renal transplant recipients. In addition, despite immunosuppressive conditions and increased risk of HPV-related malignant neoplasms in transplant recipients, HPV testing in male transplant recipients has been uncommon. Here we report a case of urethral CA in a male deceased donor renal transplantation recipient and discuss the importance of HPV testing in male transplant recipients. CASE PRESENTATION A 33-year-old male deceased donor renal transplant recipient presented with miction pain 5 years after the transplantation. He reported repeated urinary tract infections with no sexual contact since the renal transplantation. Multiple papillary tumors in his penile urethra were detected by cystoscopy, and a biopsy sample was pathologically diagnosed with CA. Transurethral tumor resection was performed, and the tumors were completely resected. Additional HPV risk type screening with a urethral smear sample showed the prevalence of low-risk HPV. Although tacrolimus was switched to everolimus and imiquimod cream was administered, the tumors recurred 6 months after the resection, and a second resection was performed. No further recurrence has been observed for 1 year to date. CONCLUSION As the urethral CA was possibly related to immunosuppressive conditions and a risk for HPV-related malignant neoplasm, the case required careful diagnosis, including HPV risk type. The methodology of sampling for HPV testing in men has not been established. This case suggests the necessity for further discussion about HPV testing in male transplant recipients.
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Affiliation(s)
- I Hamano
- Department of Urology, Oyokyo Kidney Research Institute, Hirosaki, Japan
| | - S Hatakeyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan.
| | - H Yamamoto
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Fujita
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - R Murakami
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - M Shimada
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - A Imai
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Yoneyama
- Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Yoneyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - Y Hashimoto
- Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - T Koie
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - S Narumi
- Department of Transplant Surgery, Nagoya Daini Red Cross Hospital, Nagoya, Japan
| | - H Saitoh
- Department of Urology, Oyokyo Kidney Research Institute, Hirosaki, Japan
| | - T Suzuki
- Department of Urology, Oyokyo Kidney Research Institute, Hirosaki, Japan
| | - H Tomita
- Department of Cardiology and Nephrology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
| | - C Ohyama
- Department of Urology, Hirosaki University Graduate School of Medicine, Hirosaki, Japan; Department of Advanced Transplant and Regenerative Medicine, Hirosaki University Graduate School of Medicine, Hirosaki, Japan
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22
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Kamogawa K, Ninomiya S, Watanabe M, Kondo S, Matsumoto Y, Tomita H, Okamoto K, Okuda B. Cheiro-Oral syndrome from lateral medullary infarction. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3693] [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: 11/15/2022]
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23
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Lizuka T, Kanazawa N, Kaneko J, Tominaga N, Hara A, Onozawa Y, Asari H, Hata T, Kaneko J, Yoshida K, Sugiura Y, Ugawa Y, Watanabe M, Tomita H, Kosakai A, Kaneko A, Ishima D, Kitamura E, Nishiyama K. Clinical and immunological investigations in cryptogenic new-onset refractory status epilepticus (Norse). J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.274] [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: 11/15/2022]
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24
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Watanabe M, Ninomiya S, Kondo S, Matsumoto Y, Kamogawa K, Tomita H, Okamoto K, Okuda B, Mizuta I, Mizuno T. Clinical variety of two cases of hereditary sensory and autonomic neuropathy type 1E with cognitive disorders. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Ichikawa H, Narita M, Nishizaki K, Kimura Y, Seno M, Narita N, Yonekura M, Tanaka M, Shimada M, Osanai T, Okumura K, Tomita H. P4489Rivaroxaban, a direct factor Xa inhibitor, ameliorates angiotensin II-induced renal damage through inhibition of protease-activated receptor pathway-mediated inflammatory response. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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26
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Takemura M, Nishio M, Fukumitsu K, Takeda N, Ichikawa H, Asano T, Tomita H, Kanemitsu Y, Yoshikawa K, Niimi A. Optimal cut-off value and clinical usefulness of the Adherence Starts with Knowledge-12 in patients with asthma taking inhaled corticosteroids. J Thorac Dis 2017; 9:2350-2359. [PMID: 28932539 DOI: 10.21037/jtd.2017.06.115] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND Non-adherence to inhalation regimens is common in asthmatic patients. The Adherence Starts with Knowledge-12 (ASK-12) survey was developed to detect and address patient-specific barriers to medication adherence. Our objective is to investigate the clinical usefulness of the ASK-12 for assessing and addressing adherence to inhalation therapy in asthma. METHODS The ASK-12 was administered to 138 asthmatic patients. Using pharmacy-refill data, we examined the cut-off value of the ASK-12 to identify patients who were non-adherent to inhalation regimens and identify factors associated with non-adherence. To verify the usefulness of the ASK-12, inhalation regimens were prospectively switched to less-expensive and simpler (once-daily) dosing regimens in eight non-adherent asthmatic patients who reported specific-barriers in "inconvenience of twice-daily inhaler use" and "cost". RESULTS Valid responses were received from 114 (82.6%) patients. A significant correlation was found between pharmacy-refill rates and the ASK-12 total score (r=-0.55, P<0.0001). The optimal cut-off value of the ASK-12 total score to discriminate non-adherent patients (defined by pharmacy-refill rate <80%) was 23, with 71.4% specificity and 93.3% sensitivity. Using this value, 52 (45.6%) patients were classified as non-adherent. Univariate followed by multivariate analysis identified younger age as a predictor of non-adherence to inhalation regimens (odds ratio, 2.67; 95% CI, -0.95 to -0.06; P=0.027). Switching inhaled medicines in eight patients resulted in significant improvements in both ASK-12 scores and asthma control. CONCLUSIONS The ASK-12 is a brief, practical, and clinically useful measure for assessing and addressing adherence to inhalation regimens in asthma.
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Affiliation(s)
- Masaya Takemura
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Masayuki Nishio
- Department of Respiratory Medicine, Social Medical Corporation Kojunkai, Daido Hospital, Daido Clinic, Nagoya, Japan
| | - Kensuke Fukumitsu
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Norihisa Takeda
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Hiroya Ichikawa
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Takamitsu Asano
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Hiroki Tomita
- Department of Respiratory Medicine, Social Medical Corporation Kojunkai, Daido Hospital, Daido Clinic, Nagoya, Japan
| | - Yoshihiro Kanemitsu
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
| | - Kosho Yoshikawa
- Department of Respiratory Medicine, Social Medical Corporation Kojunkai, Daido Hospital, Daido Clinic, Nagoya, Japan
| | - Akio Niimi
- Department of Respiratory Medicine, Allergy and Clinical Immunology, Graduate School of Medical Sciences, Nagoya City University, Nagoya, Japan
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27
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Wakai E, Ando M, Matsukawa S, Taguchi T, Yamamoto T, Tomita H, Takada F. Effect of Initial Heat Treatment on DBTT of F82H Steel Irradiated by Neutrons. Fusion Science and Technology 2017. [DOI: 10.13182/fst05-a793] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [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)
- E. Wakai
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
| | - M. Ando
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
| | - S. Matsukawa
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
| | - T. Taguchi
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
| | - T. Yamamoto
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
| | - H. Tomita
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
| | - F. Takada
- Japan Atomic Energy Research Institute, Tokai-mura, Ibaraki-ken, 319-1195 Japan,
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28
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Hirota S, Inaji M, Nariai T, Hara M, Tamaki M, Maehara T, Tomita H, Tone O. Correlations between Cognitive Impairments and Employment Status in Patients with Diffuse Axonal Injury. Neurol Med Chir (Tokyo) 2016; 57:94-100. [PMID: 28003570 PMCID: PMC5341345 DOI: 10.2176/nmc.oa.2016-0049] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Patients with diffuse axonal injury (DAI) may initially present with prominent physical impairments, but their cognitive dysfunctions are more persistent and are attributable to later unemployment. In this study, we analyzed how the findings of early and delayed neuropsychological assessments correlated with employment outcome of patients with DAI. A total of 56 patients with DAI without motor or visual dysfunction were included in this study. The neuropsychological battery consisted of the Wechsler Adult Intelligent Scale - Revised (WAIS-R), Wechsler Memory Scale - Revised (WMS-R), Trail Making Test (TMT), Wisconsin Card Sorting Test (WCST), and Word Fluency Test (WFT). This battery of tests was administered twice in early stage after injury and in later stage. The results of all of the neuropsychological tests improved significantly (P <0.001) between the early and later assessments. All scores other than TMT part A and B improved to the normal range (Z-score ≥ 2). The patient characteristics (age, gender, initial Glasgow Coma Scale, and duration of posttraumatic amnesia) had no relationship to the outcome. The results of TMT part B, however, were significantly correlated with employment outcome in both the early and later assessments (P = 0.01, 0.04). Given that TMT evaluates visual attention, we surmise that a lack of attention may be the core symptom of the cognitive deficit and cause the re-employment failure in patients with DAI. TMT part B in both early and later assessments has the potential to accurately predict chronic functional outcome.
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Affiliation(s)
- Shin Hirota
- Department of Neurosurgery, Tokyo Medical and Dental University
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29
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Izumi Y, Tomita H, Nakayama Y, Hayashi S, Morishima K, Isobe M, Cheon MS, Ogawa K, Nishitani T, Naka T, Nakano T, Nakamura M, Iguchi T. Development of fast neutron pinhole camera using nuclear emulsion for neutron emission profile measurement in KSTAR. Rev Sci Instrum 2016; 87:11D840. [PMID: 27910454 DOI: 10.1063/1.4963866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We have developed a compact fast neutron camera based on a stack of nuclear emulsion plates and a pinhole collimator. The camera was installed at J-port of Korea superconducting tokamak advanced research at National Fusion Research Institute, Republic of Korea. Fast neutron images agreed better with calculated ones based on Monte Carlo neutron simulation using the uniform distribution of Deuterium-Deuterium (DD) neutron source in a torus of 40 cm radius.
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Affiliation(s)
- Y Izumi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Nakayama
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - S Hayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - K Morishima
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Isobe
- National Insutitute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - M S Cheon
- Diagnostics Technology Team, ITER Korea, National Fusion Reseach Institute, Daegeon 305-333, South Korea
| | - K Ogawa
- National Insutitute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Nishitani
- National Insutitute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - T Naka
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Nakano
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M Nakamura
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Iguchi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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30
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Nakaya N, Nakamura T, Tsuchiya N, Tsuji I, Hozawa A, Tomita H. Unemployment risk among individuals undergoing medical treatment for chronic diseases. Occup Med (Lond) 2015; 66:143-9. [PMID: 26567288 DOI: 10.1093/occmed/kqv159] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 01/23/2023] Open
Abstract
BACKGROUND Chronic diseases increase the risk of unemployment even in non-disaster settings; therefore, in post-disaster settings, special attention needs to be paid to the employment status of those suffering from chronic diseases. AIMS To examine the association between chronic disease and the risk of unemployment in a disaster area. METHODS This cross-sectional study was conducted in Shichigahama Town, Miyagi, north-eastern Japan, where had been severely inundated by the 2011 tsunami. Logistic regression analyses were used to evaluate the association between undergoing medical treatment for a combination of chronic diseases (stroke, cancer, myocardial infarction and angina) and unemployment risk. Confounders such as psychological distress and levels of daily life activity were considered. RESULTS Among the 2588 individuals studied, there was a statistically significant association between undergoing medical treatment for chronic disease and the risk of unemployment [odds ratio (OR) = 1.7, 95% confidence interval (CI) 1.02-2.7, P < 0.05]. In participants with a lower degree of psychological distress and better levels of daily life activity (n = 1967), no significant associations were observed (OR = 1.1, 95% CI 0.6-2.1). Conversely, in 536 participants with a higher degree of psychological distress and/or poorer levels of daily life activity, statistically significant associations were found (OR = 2.6, 95% CI 1.01-6.6, P < 0.05). CONCLUSIONS The association between undergoing medical treatment for chronic disease and unemployment risk was observed only in participants with a higher degree of psychological distress and/or poorer levels of daily life activity.
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Affiliation(s)
- N Nakaya
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan,
| | - T Nakamura
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan
| | - N Tsuchiya
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan
| | - I Tsuji
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan, Division of Epidemiology, Department of Public Health and Forensic Medicine, Tohoku University Graduate School of Medicine, Sendai 980-8573, Japan
| | - A Hozawa
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan
| | - H Tomita
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai 980-8573, Japan, Department of Disaster Psychiatry, International Research Institute of Disaster Science, Tohoku University, Sendai 980-8573, Japan
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31
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Uchida Y, Takada E, Fujisaki A, Isobe M, Ogawa K, Shinohara K, Tomita H, Kawarabayashi J, Iguchi T. A study on fast digital discrimination of neutron and gamma-ray for improvement neutron emission profile measurement. Rev Sci Instrum 2014; 85:11E118. [PMID: 25430297 PMCID: PMC4137813 DOI: 10.1063/1.4891711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Accepted: 07/18/2014] [Indexed: 06/04/2023]
Abstract
Neutron and γ-ray (n-γ) discrimination with a digital signal processing system has been used to measure the neutron emission profile in magnetic confinement fusion devices. However, a sampling rate must be set low to extend the measurement time because the memory storage is limited. Time jitter decreases a discrimination quality due to a low sampling rate. As described in this paper, a new charge comparison method was developed. Furthermore, automatic n-γ discrimination method was examined using a probabilistic approach. Analysis results were investigated using the figure of merit. Results show that the discrimination quality was improved. Automatic discrimination was applied using the EM algorithm and k-means algorithm.
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Affiliation(s)
- Y Uchida
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - E Takada
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - A Fujisaki
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - M Isobe
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Shinohara
- Japan Atomic Energy Agency, 801-1 Mukoyama, Naka 311-0913, Japan
| | - H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - J Kawarabayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Iguchi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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32
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Tomita H, Yamashita F, Nakayama Y, Morishima K, Yamamoto Y, Sakai Y, Cheon MS, Isobe M, Ogawa K, Hayashi S, Kawarabayashi J, Iguchi T. Progress in development of neutron energy spectrometer for deuterium plasma operation in KSTAR. Rev Sci Instrum 2014; 85:11E120. [PMID: 25430299 DOI: 10.1063/1.4893004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two types of DD neutron energy spectrometer (NES) are under development for deuterium plasma operation in KSTAR to understand behavior of beam ions in the plasma. One is based on the state-of-the-art nuclear emulsion technique. The other is based on a coincidence detection of a recoiled proton and a scattered neutron caused by an elastic scattering of an incident DD neutron, which is called an associated particle coincidence counting-NES. The prototype NES systems were installed at J-port in KSTAR in 2012. During the 2012 and 2013 experimental campaigns, multiple shots-integrated neutron spectra were preliminarily obtained by the nuclear emulsion-based NES system.
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Affiliation(s)
- H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - F Yamashita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Nakayama
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - K Morishima
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Yamamoto
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - Y Sakai
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - M S Cheon
- Diagnostics Technology Team, ITER Korea, National Fusion Research Institute, Daejeon 305-333, Republic of Korea
| | - M Isobe
- The Graduate University for Advanced Studies, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - K Ogawa
- National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
| | - S Hayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - J Kawarabayashi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Iguchi
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
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33
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Ogawa K, Isobe M, Takada E, Uchida Y, Ochiai K, Tomita H, Uritani A, Kobuchi T, Takeiri Y. Progress in development of the neutron profile monitor for the large helical device. Rev Sci Instrum 2014; 85:11E110. [PMID: 25430289 DOI: 10.1063/1.4890399] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The neutron profile monitor stably operated at a high-count-rate for deuterium operations in the Large Helical Device has been developed to enhance the research on the fast-ion confinement. It is composed of a multichannel collimator, scintillation-detectors, and a field programmable gate array circuit. The entire neutron detector system was tested using an accelerator-based neutron generator. This system stably acquires the pulse data without any data loss at high-count-rate conditions up to 8 × 10(5) counts per second.
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Affiliation(s)
- K Ogawa
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - M Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - E Takada
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - Y Uchida
- National Institute of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan
| | - K Ochiai
- Fusion Research and Development Directorate, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan
| | - H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - A Uritani
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan
| | - T Kobuchi
- National Institute for Fusion Science, Toki 509-5292, Japan
| | - Y Takeiri
- National Institute for Fusion Science, Toki 509-5292, Japan
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Miwa S, Ishibashi S, Tomita H, Nozaki T, Tamura E, Ando K, Mizuochi N, Saruya T, Kubota H, Yakushiji K, Taniguchi T, Imamura H, Fukushima A, Yuasa S, Suzuki Y. Highly sensitive nanoscale spin-torque diode. Nat Mater 2014; 13:50-56. [PMID: 24141450 DOI: 10.1038/nmat3778] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 09/14/2013] [Indexed: 06/02/2023]
Abstract
Highly sensitive microwave devices that are operational at room temperature are important for high-speed multiplex telecommunications. Quantum devices such as superconducting bolometers possess high performance but work only at low temperature. On the other hand, semiconductor devices, although enabling high-speed operation at room temperature, have poor signal-to-noise ratios. In this regard, the demonstration of a diode based on spin-torque-induced ferromagnetic resonance between nanomagnets represented a promising development, even though the rectification output was too small for applications (1.4 mV mW(-1)). Here we show that by applying d.c. bias currents to nanomagnets while precisely controlling their magnetization-potential profiles, a much greater radiofrequency detection sensitivity of 12,000 mV mW(-1) is achievable at room temperature, exceeding that of semiconductor diode detectors (3,800 mV mW(-1)). Theoretical analysis reveals essential roles for nonlinear ferromagnetic resonance, which enhances the signal-to-noise ratio even at room temperature as the size of the magnets decreases.
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Affiliation(s)
- S Miwa
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2]
| | - S Ishibashi
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan [3]
| | - H Tomita
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - T Nozaki
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - E Tamura
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - K Ando
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - N Mizuochi
- Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan
| | - T Saruya
- 1] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan [2]
| | - H Kubota
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - K Yakushiji
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - T Taniguchi
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - H Imamura
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - A Fukushima
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - S Yuasa
- National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
| | - Y Suzuki
- 1] Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan [2] National Institute of Advanced Industrial Science and Technology (AIST), Spintronics Research Center, Tsukuba, Ibaraki 305-8568, Japan
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Ogawa F, Tomita H, Koike Y, Kuwatsuka Y, Utani A. AB0229 Senescence associated β-galactosisdase expression in systemic sclerosis skin and fibroblasts. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.229] [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: 11/04/2022]
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Sonoda T, Wada M, Tomita H, Sakamoto C, Takatsuka T, Noto T, Iimura H, Matsuo Y, Kubo T, Shinozuka T, Wakui T, Mita H, Naimi S, Furukawa T, Itou Y, Schury P, Miyatake H, Jeong S, Ishiyama H, Watanabe Y, Hirayama Y. Development of a gas cell-based laser ion source for RIKEN PALIS. ACTA ACUST UNITED AC 2013. [DOI: 10.1007/s10751-013-0817-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kamogawa K, Tomita H, Okamoto K, Okuda B. Useless Hand Syndrome with Astereognosis in Multiple Sclerosis (P04.101). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p04.101] [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: 11/15/2022] Open
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Wang Z, Sugano E, Isago H, Murayama N, Tamai M, Tomita H. Notch signaling pathway regulates proliferation and differentiation of immortalized Müller cells under hypoxic conditions in vitro. Neuroscience 2012; 214:171-80. [PMID: 22525134 DOI: 10.1016/j.neuroscience.2012.04.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 03/26/2012] [Accepted: 04/12/2012] [Indexed: 12/14/2022]
Abstract
Previous studies have indicated that Müller glia in chick and fish retinas can re-enter the cell cycle, express progenitor genes, and regenerate neurons via the Notch signaling pathway in response to retinal damage or growth factors. Here, we investigated the role of Notch signaling and the effect of hypoxia, as a means to induce retinal damage, on the proliferation of an immortalized Müller cell line (rMC-1 cells). Our data showed that rMC-1 cells expressed Müller glia and neural and retinal progenitor markers but did not express neuronal or retinal markers. Hypoxia increased rMC-1 cell proliferation by activating the positive cell-cycle regulators, cyclins A and D1, as well as the neural and retinal progenitor markers, Notch1, Hes1, nestin, Sox2, Msi1, Pax6, and NeuroD1. However, hypoxia did not significantly influence the expression of Müller glial markers GS, CRALBP, and cyclin D3 or the death of the rMC-1 cells. The increase in cell proliferation induced by hypoxia was greatly attenuated by blocking Notch signaling with the inhibitor DAPT, resulting in the reduced expression of positive cell-cycle regulators (cyclins A and D1) and neural and retinal progenitor markers (Notch1, Hes1, Sox2, Pax6, and NeuroD1). Blockade of the Notch signaling pathway by DAPT after hypoxia promoted the differentiation of rMC-1 cells to neurons, as demonstrated by the induction of neural marker (Tuj1), retinal amacrine (Syntaxin1), and retinal ganglion cell (Brn3b) markers, although the expression of the latter marker was low. Taken together, our data indicate that Notch signaling is required for proliferation under hypoxic conditions either by activating the positive cell-cycle regulators or by skewing their de-differentiation towards a neural progenitor lineage. These findings indicate that the Notch signaling pathway regulates hypoxia-induced proliferation and differentiation of Müller glia.
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Affiliation(s)
- Z Wang
- Tohoku University Institute for International Advanced Interdisciplinary Research, 4-1 Seiryo-machi, Aoba-ku, Sendai, Japan
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Tomita H, Ogawa F, Yoshizaki A, Akiyama Y, Kinoshita N, Utani A. Periorbital milia-like calcinosis. Clin Exp Dermatol 2012; 37:787-8. [PMID: 22439895 DOI: 10.1111/j.1365-2230.2012.04348.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Osanai T, Tanaka M, Magota K, Tomita H, Okumura K. Coupling factor 6-induced activation of ecto-F1F(o) complex induces insulin resistance, mild glucose intolerance and elevated blood pressure in mice. Diabetologia 2012; 55:520-9. [PMID: 22038518 DOI: 10.1007/s00125-011-2341-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Accepted: 09/20/2011] [Indexed: 01/03/2023]
Abstract
AIMS/HYPOTHESIS Despite advances in pharmacological treatments, diabetes with hypertension continues to be a major public health problem with high morbidity and mortality rates. We recently identified a circulating peptide coupling factor 6 (CF6), which binds to the plasma membrane ATP synthase (ecto-F(1)F(o) complex), resulting in intracellular acidosis. We investigated whether overexpression of CF6 contributes to diabetes and hypertension by intracellular acidosis. METHODS Transgenic mice overexpressing CF6 (also known as ATP5J) were generated, and physiological, biochemical and molecular biology studies were performed. RESULTS CF6 overexpression elicited a sustained decrease in intracellular pH in tissues (aorta, kidney, skeletal muscle and liver, with the exception of adipose tissue) that express its receptor, the β-subunit of ecto-F(1)F(o) complex. Consistent with the receptor distribution, phospho-insulin receptor β, phosphoinositide 3-kinase activity and the phospho-Akt1:total Akt1 ratio were all decreased in the skeletal muscle and the liver in transgenic compared with wild-type mice, resulting in a decrease of plasma membrane-bound GLUT4 and an increase in hepatic glucose production. Under a high-sucrose diet, transgenic mice had insulin resistance and mild glucose intolerance; under a high-salt diet, they had elevated blood pressure with increased renal RAS-related C3 botulinum substrate 1 (RAC1)-GTP, which is an activator of mineralocorticoid receptor. CONCLUSIONS/INTERPRETATION Through its action on the β-subunit of ecto-F(1)F(o) complex, which results in intracellular acidosis, CF6 plays a crucial role in the development of insulin resistance and hypertension. This finding might advance our understanding of the mechanisms underlying diabetes and hypertension, possibly also providing a novel therapeutic target against cardiovascular disease.
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Affiliation(s)
- T Osanai
- Department of Cardiology, Hirosaki University Graduate School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Japan.
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Tomita H, Muroi E, Takenaka M, Nishimoto K, Kakeya H, Ohno H, Miyazaki Y, Utani A. Rhizomucor variabilis infection in human cutaneous mucormycosis. Clin Exp Dermatol 2010; 36:312-4. [PMID: 21070336 DOI: 10.1111/j.1365-2230.2010.03956.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li Y, Tomita H, Lv Y, Liu J, Xue F, Zheng B, Ike Y. Molecular characterization of erm(B)- and mef(E)-mediated erythromycin-resistant Streptococcus pneumoniae in China and complete DNA sequence of Tn2010. J Appl Microbiol 2010; 110:254-65. [PMID: 20961364 DOI: 10.1111/j.1365-2672.2010.04875.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS To characterize the erm(B)- and mef(E)-mediated erythromycin-resistant Streptococcus pneumoniae clinical isolates obtained from ten hospitals located different cities in China. METHODS AND RESULTS Totally 83 S. pneumoniae were collected, and eighteen representative strains of 66 strains that exhibited erythromycin resistance were used for further characterization by antibiograms, serotyping, PFGE, MLST, DNA sequencing of the macrolide-resistance elements and mapping of the elements on the chromosome. Twelve isolates showed a high-level resistance to erythromycin, and six other isolates showed a low-level resistance to erythromycin. Thirteen isolates harboured a Tn2010 transposon (26·4 kbp) encoding the erm(B), tet(M) and mef(E) genes and were classified into three types by Tn2010 structures. The remaining five isolates harboured a Tn6002 transposon (20·9 kbp) encoding the erm(B) and tet(M) genes and were classified into three types by Tn6002 locations on the chromosome. Three of the Tn6002 elements were located within the Tn5252-like element, implying that these composed a large mobile element. The MLST analyses showed that several clones had been disseminated and that the CC271 strains carrying the Tn2010 element expressing the high-level resistance to erythromycin were predominant in China. Four new MLST strains, which were designated as ST3262, ST3263, ST3397 and ST3398 were also identified. CONCLUSIONS The erythromycin resistance determinant of S.pneumoniae that had been isolated in China was located in Tn2010 or the Tn6002 element and several clones had been disseminated, and the CC271 strains carrying the Tn2010 element expressing the high-level resistance to erythromycin were predominant in China. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first molecular analysis of erythromycin-resistant Streptococcus pneumoniae clinical isolates in China, and the first report of the complete nucleotide sequence of Tn2010 (26,390 bp).
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Affiliation(s)
- Y Li
- Department of Bacteriology, Gunma University Graduate School of Medicine, Maebashi, Gunma, Japan
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Isobe M, Yamanishi H, Osakabe M, Miyake H, Tomita H, Watanabe K, Iwai H, Nomura Y, Nishio N, Ishii K, Kaneko JH, Kawarabayashi J, Takada E, Uritani A, Sasao M, Iguchi T, Takeiri Y, Yamada H. Fusion product diagnostics planned for Large Helical Device deuterium experiment. Rev Sci Instrum 2010; 81:10D310. [PMID: 21033836 DOI: 10.1063/1.3492383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Deuterium experiment on the Large Helical Device (LHD) is now being planned at the National Institute for Fusion Science. The fusion product diagnostics systems currently considered for installation on LHD are described in this paper. The systems will include a time-resolved neutron yield monitor based on neutron gas counters, a time-integrated neutron yield monitor based on activation techniques, a multicollimator scintillation detector array for diagnosing spatial distribution of neutron emission rate, 2.5 MeV neutron spectrometer, 14 MeV neutron counter, and prompt γ-ray diagnostics.
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Affiliation(s)
- M Isobe
- National Institute for Fusion Science, Toki 509-5292, Japan.
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Tomita H, Iwai H, Iguchi T, Isobe M, Kawarabayashi J, Konno C. Development of neutron spectrometer toward deuterium plasma diagnostics in LHD. Rev Sci Instrum 2010; 81:10D309. [PMID: 21033835 DOI: 10.1063/1.3464260] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Neutron spectrometer based on coincident counting of associated particles has been developed for deuterium plasma diagnostics on Large Helical Device (LHD) at the National Institute for Fusion Science. Efficient detection of 2.5 MeV neutron with high energy resolution would be achievable by coincident detection of a scattered neutron and a recoiled proton associated with an elastic scattering of incident neutron in a plastic scintillator as a radiator. The calculated neutron spectra from deuterium plasma heated by neutral beam injection indicate that the energy resolution of better than 7% is required for the spectrometer to evaluate energetic deuterium confinement. By using a prototype of the proposed spectrometer, the energy resolution of 6.3% and the detection efficiency of 3.3×10(-7) count/neutron were experimentally demonstrated for 2.5 MeV monoenergetic neutron, respectively.
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Affiliation(s)
- H Tomita
- Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan.
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Tomita H. [Long-term problems associated with emergency neurological medicine]. Brain Nerve 2010; 62:51-60. [PMID: 20112792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Japanese medical care systems suffered from a number of long-term problems associated with emergency neurological medicine; moreover, with decreasing birthrate and aging society, these problems are rapidly worsening. The problems include shortage and uneven distribution of the necessary convalescent beds required for the treatment of stroke patients, scarcity of beds for treatment heavy work load of in-house healthcare staff, and shortage of human resources, furthermore, back-up emergency wards for acute treatment have not been developed. Medical facilities should be easily available to the general public; however, in a free economy, it is difficult to modify these facilities according to social needs. Moreover, presently, patients with higher brain dysfunction are supported only through nationwide system. It is necessary to recognize the current situation in which many patients have no other choice but to stay at home. In the light of this situation, the medical doctors in charge of emergency neurological medicine should discuss their future mode of action.
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Affiliation(s)
- Hiroki Tomita
- Musashino Red Cross Hospital, 1-26-1 Kyounancho, Musashino-shi, Tokyo 180-8610, Japan
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Fujii M, Tone O, Tomita H, Tamaki M, Akimoto H, Shigeta K, Sampetrean O, Kanno K, Matsushita M. [Endosaccular embolization of an intrasellar aneurysm with hypopituitarism: case report]. No Shinkei Geka 2008; 36:329-337. [PMID: 18411798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
An 81-year-old male presented with weight loss and hyponatremia. A baseline endocrinological examination revealed anterior pituitary dysfunction. A computed tomography and MRI revealed a large, unruptured intrasellar aneurysm protruding from the right internal carotid artery and pushing the pituitary stalk leftward. The patient developed polyuria and polydipsia from 10 days after commencing corticosteroid supplementation and was diagnosed with partial central diabetes insipidus (DI). Balloon assisted endosaccular embolization was performed about one month after the posterior pituitary dysfunction was identified. The unruptured aneurysm was successfully embolized with Guglielmi detachable coils (GDCs) without narrowing of the parent vessel. DI resolved completely and the posterior pituitary dysfunction improved soon after endosaccular embolization. The remission of DI after coil embolization suggested that the DI might have been induced by the progressive mass effect of the aneurysm rather than by the steroid. An endocrinological evaluation and cerebral angiography confirmed partial recovery of anterior pituitary dysfunction and almost complete obliteration of the aneurysm, respectively at 1 year after the operation. We report a case of hypopituitarism secondary to the large intrasellar aneurysm. This aneurysm was embolized with GDCs, resulting in partial recovery of anterior pituitary dysfunction and complete recovery of posterior pituitary dysfunction.
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Affiliation(s)
- Mutsumi Fujii
- Department of Neurosurgery, Musashino Red Cross Hospital, Japan
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Yamada M, Kushibiki M, Osanai T, Tomita H, Okumura K. Vasoconstrictor effect of aldosterone via angiotensin II type 1 (AT1) receptor: possible role of AT1 receptor dimerization. Cardiovasc Res 2008; 79:169-78. [DOI: 10.1093/cvr/cvn064] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Zheng B, Tomita H, Xiao YH, Ike Y. The first molecular analysis of clinical isolates of VanA-type vancomycin-resistant Enterococcus faecium strains in Mainland China. Lett Appl Microbiol 2007; 45:307-12. [PMID: 17718844 DOI: 10.1111/j.1472-765x.2007.02191.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS The aim of this study was to examine two VanA-type vancomycin-resistant Enterococcus faecium (VRE) strains that had been isolated from patients resident in mainland China. This is the first molecular analysis of clinical VRE strains being isolated in mainland China. METHODS AND RESULTS Two VanA-type VRE isolates were isolated from in-patients at hospitals located in the Chinese cities Beijing and Dalian and were designated C264 and I125. The plasmids pC264V (40 kbp) and pI125V (370 kbp) that were isolated from C264 and I125, respectively, carried a Tn1546-like element encoding VanA resistance. The vancomycin-resistant plasmids pC264V and pI125V were transferred by filter mating at frequencies of 10(-7) and 10(-4) respectively. Sequence analysis of pC264V revealed that two IS1216V sequences and an IS1542 sequence were present within the Tn1546-like element. pI125V had two IS1216V insertions in the Tn1546-like element. CONCLUSIONS The two VanA-type vancomycin-resistant E. faecium (VRE) strains C264 and I125 were isolated from in-patients in Chinese hospitals. The vancomycin-resistant conjugative plasmids pC264V and pI125V plasmids isolated from these strains carried the Tn1546-like element. The Tn1546-like element was found to contain the insertion sequences IS1216V and IS1542. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first molecular analysis of VanA-type VRE strains from patients resident in mainland China.
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Affiliation(s)
- B Zheng
- Institute of Clinical Pharmacology, Peking University First Hospital, Beijing, China
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Kitase M, Mizutani M, Tomita H, Kono T, Sugie C, Shibamoto Y. Blunt renal trauma: Comparison of contrast-enhanced CT and angiographic findings and the usefulness of transcatheter arterial embolization. VASA 2007; 36:108-13. [PMID: 17708102 DOI: 10.1024/0301-1526.36.2.108] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Background: The purpose of this study was to evaluate the role of contrast-enhanced CT and the usefulness of superselective embolization therapy in the management of arterial damage in patients with severe blunt renal trauma. Patients and methods: Nine cases of severe renal trauma were evaluated. In all cases, we compared contrast-enhanced CT findings with angiographic findings, and performed transcatheter arterial embolization (TAE) in six of them with microcoils and gelatin sponge particles. Morphological changes in the kidney and site of infarction after TAE were evaluated on follow-up CT. Chronological changes in blood biochemistry findings after injury, degree of anemia and renal function were investigated. Adverse effects or complications such as duration of hematuria, fever, abdominal pain, renovascular hypertension and abscess formation were also evaluated. Results: The CT finding of extravasation was a reliable sign of active bleeding and useful for determining the indication of TAE. In all cases, bleeding was effectively controlled with superselective embolization. There was minimal procedure-related loss of renal tissue. None of the patients developed abscess, hypertension or other complications. Conclusions: In blunt renal injury, contrast-enhanced CT was useful for diagnosing arterial hemorrhage. Arterial bleeding may produce massive hematoma and TAE was a useful treatment for such cases. By using selective TAE for a bleeding artery, it was possible to minimize renal parenchymal damage, with complications of TAE rarely seen.
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Affiliation(s)
- M Kitase
- Department of Radiology, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan.
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