1
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Gi T, Kuroiwa Y, Kihara Y, Miyaushiro S, Yamashita A. Magnetic Resonance Imaging of Cancer-Associated Deep Vein Thrombus in a Patient With Gastric Cancer. Circ Rep 2023; 5:265-266. [PMID: 37305795 PMCID: PMC10247346 DOI: 10.1253/circrep.cr-23-0028] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 03/15/2023] [Indexed: 06/13/2023] Open
Affiliation(s)
- Toshihiro Gi
- Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
| | - Yasuyoshi Kuroiwa
- Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
- Department of Radiological Technology, Koga General Hospital Miyazaki Japan
| | - Yasushi Kihara
- Department of Radiology, Koga General Hospital Miyazaki Japan
| | - Sae Miyaushiro
- Department of Clinical Oncology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
| | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
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2
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Kato T, Kojima K, Sumikura M, Kuroiwa Y. Study on ammonia generation from digested sludge by subcritical water treatment. Water Sci Technol 2023; 87:614-619. [PMID: 36789707 DOI: 10.2166/wst.2023.015] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Organic sludge has recently attracted attention as a renewable energy source. While the organic matter contained in sludge can be utilized as various renewable energy sources, its nitrogen component has limited use. In this study, subcritical water treatment was conducted to recover ammonia from digested sludge. While ammonia recovered via stripping is limited to soluble components, subcritical water treatment can convert solid components and dissolved organic nitrogen sludge into ammonia. Digested sludge was treated at several reaction temperatures, reaction pressures, treatment times, and oxygen ratios to determine the ammonia generation rate. Among the conditions tested in this study, an ammonium generation rate of 84.0% was obtained at 400 °C, 10 MPa, a treatment time of 5 min, and at an oxygen ratio of 1.2.
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Affiliation(s)
- Takahiro Kato
- Shimizu Corporation, 3-4-17, Etchujima, Koto-ku, Tokyo 135-8530, Japan
| | - K Kojima
- Shimizu Corporation, 3-4-17, Etchujima, Koto-ku, Tokyo 135-8530, Japan
| | - M Sumikura
- Shimizu Corporation, 3-4-17, Etchujima, Koto-ku, Tokyo 135-8530, Japan
| | - Y Kuroiwa
- Shimizu Corporation, 3-4-17, Etchujima, Koto-ku, Tokyo 135-8530, Japan
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3
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Shiiba T, Sekikawa Y, Tateoka S, Shinohara N, Inoue Y, Kuroiwa Y, Tanaka T, Kihara Y, Imamura T. Verification of the effect of acquisition time for SwiftScan on quantitative bone single-photon emission computed tomography using an anthropomorphic phantom. EJNMMI Phys 2022; 9:48. [PMID: 35907090 PMCID: PMC9339048 DOI: 10.1186/s40658-022-00477-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Accepted: 07/20/2022] [Indexed: 11/25/2022] Open
Abstract
Background SwiftScan single-photon emission computed tomography (SPECT) is a recently released scanning technique with data acquired when the detector is stationary and when it moves from one view to the next. The influence of scan time for using SwiftScan on quantitative bone SPECT remains unclear. This study aimed to clarify the effect of the scan time for SwiftScan SPECT on the image quality and quantification of bone SPECT compared to step and shoot mode (SSM) using 99mTc-filled anthropomorphic phantom (SIM2 bone phantom). Materials and methods Phantom SPECT/computed tomography (CT) images were acquired using Discovery NM/CT 860 (GE Healthcare) with a low-energy high-resolution sensitivity collimator. We used the fixed parameters (subsets 10 and iterations 5) for reconstruction. The coefficient of variation (CV), contrast-to-noise ratio (CNR), full width at half maximum (FWHM), and quantitative value of SwiftScan SPECT and SSM were compared at various acquisition times (5, 7, 17, and 32 min). Results In the short-time scan (< 7 min), the CV and CNR of SwiftScan SPECT were better than those of SSM, whereas in the longtime scan (> 17 min), the CV and CNR of SwiftScan SPECT were similar to those of SSM. The FWHMs for SwiftScan SPECT (13.6–14.8 mm) and SSM (13.5–14.4 mm) were similar. The mean absolute errors of quantitative values at 5, 7, 17, and 32 min were 38.8, 38.4, 48.8, and 48.1, respectively, for SwiftScan SPECT and 41.8, 40.8%, 47.2, and 49.8, respectively, for SSM. Conclusions SwiftScan on quantitative bone SPECT provides improved image quality in the short-time scan with quantification similar to or better than SSM. Therefore, in clinical settings, using SwiftScan SPECT instead of the SSM scan protocol in the short-time scan might provide higher-quality diagnostic images than SSM. Our results could provide vital information on the use of SwiftScan SPECT.
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Affiliation(s)
- Takuro Shiiba
- Department of Molecular Imaging, School of Medical Sciences, Fujita Health University, 1-98, Dengakubo, Kutsukake-cho, Aichi, 470-1192, Toyoake, Japan.
| | - Yuya Sekikawa
- Department of Radiological Technology, Faculty of Fukuoka Medical Technology, Teikyo University, 6-22 Misakimachi, Omuta-shi, Fukuoka, 836-8505, Japan
| | - Shinji Tateoka
- Department of Radiological Technology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan
| | - Nobutaka Shinohara
- Department of Radiological Technology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan
| | - Yuuki Inoue
- Department of Radiological Technology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan
| | - Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan.,Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, 889-1692, Japan
| | - Takashi Tanaka
- Department of Radiology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan
| | - Yasushi Kihara
- Department of Radiology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan
| | - Takuroh Imamura
- Department of Internal Medicine, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki-shi, Miyazaki, 880-0041, Japan
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4
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Kuroiwa Y, Kusumoto K, Shimata K, Yamashita A, Hibi T, Asada Y, Imamura T. MRI diffusion-weighted imaging detects a fresh portal vein thrombus as a high intensity lesion in a patient with a liver transplant: A case report. Acta Radiol Open 2022; 10:20584601211069557. [PMID: 34992794 PMCID: PMC8725224 DOI: 10.1177/20584601211069557] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Accepted: 12/09/2021] [Indexed: 11/23/2022] Open
Abstract
Portal vein thrombosis is one of the most serious complications after liver
transplantation. It is important to determine the age of the thrombus for management of
portal vein thrombosis. We present a case report of histologically confirmed heterogenous
fresh portal vein thrombus which was depicted heterogenous high signal intensity on
magnetic resonance diffusion weighted imaging. The sequence may be a useful imaging tool
for detecting fresh thrombus components in the portal vein thrombosis.
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Affiliation(s)
- Yasuyoshi Kuroiwa
- Department of Radiological Technology,
Internal Medicine, Koga General Hospital, Miyazaki, Japan
- Department of Pathology, Faculty of
Medicine, University of Miyazaki, Miyazaki, Japan
| | | | - Keita Shimata
- Department of Pediatric Surgery and
Transplantation, Kumamoto University Graduate School of Medical
Sciences, Kumamoto, Japan
| | - Atsushi Yamashita
- Department of Pathology, Faculty of
Medicine, University of Miyazaki, Miyazaki, Japan
- Atsushi Yamashita, Department of Pathology, Faculty
of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan.
| | - Taizo Hibi
- Department of Pediatric Surgery and
Transplantation, Kumamoto University Graduate School of Medical
Sciences, Kumamoto, Japan
| | - Yujiro Asada
- Department of Pathology, Faculty of
Medicine, University of Miyazaki, Miyazaki, Japan
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5
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Gi T, Kuroiwa Y, Yamashita A, Mizutani Y, Asanuma T, Miyati T, Maekawa K, Aman M, Imamura T, Asada Y. High Signal Intensity on Diffusion-Weighted Images Reflects Acute Phase of Deep Vein Thrombus. Thromb Haemost 2020; 120:1463-1473. [PMID: 32746467 PMCID: PMC7511261 DOI: 10.1055/s-0040-1714280] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 01/08/2023]
Abstract
The effects of antithrombotic therapy on deep vein thrombosis (DVT) can be affected by thrombus age, which cannot be reliably determined by noninvasive imaging modalities. We investigated whether magnetic resonance (MR) diffusion-weighted imaging (DWI) can localize and determine the age of venous thrombus in patients with DVT, animal models, and human blood in vitro. Signal intensity (SI) on DWI and the apparent diffusion coefficient (ADC) of thrombi were assessed in eight patients with DVT using a 1.5-T MR imaging (MRI) system. We assessed the organizing processes as venous thrombus developed in the rabbit jugular vein using a 3.0-T MRI system over time. We also assessed MRI signals of human blood in vitro using the 1.5-T MRI system. Venous thrombi were detected by DWI as areas of high or mixed high and iso SI in all patients. The ADCs were lower in the proximal, than in the distal portion of the thrombi. The thrombi of rabbit jugular veins histologically organized in a time-dependent manner, with high SI on DWI at 4 hours, mixed high and iso SI at 1 and 2 weeks, and iso SI at 3 weeks. The ADC correlated negatively with erythrocyte content, and positively with smooth muscle cells, macrophages, hemosiderin, and collagen content. MRI signals of human blood in vitro showed that ADCs were affected by erythrocyte content, but not by blood clotting. MR-DWI can detect venous thrombus, and high SI on DWI accompanied by a low ADC might reflect erythrocyte-rich, acute-phase thrombi.
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Affiliation(s)
- Toshihiro Gi
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Yasuyoshi Kuroiwa
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan.,Department of Radiological Technology, Koga General Hospital, Miyazaki, Japan
| | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Yuko Mizutani
- Division of Radiology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki, Japan
| | - Taketoshi Asanuma
- Development of Veterinary Medicine, Faculty of Veterinary Medicine, Imabari Campus, Okayama University of Science, Imabari, Japan
| | - Tosiaki Miyati
- Institute of Medical, Pharmaceutical and Health Sciences, Faculty of Health Sciences, Kanazawa University, Ishikawa, Japan
| | - Kazunari Maekawa
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Murasaki Aman
- Department of Diagnostic Pathology, University of Miyazaki Hospital, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Takuroh Imamura
- Department of Internal Medicine, Koga General Hospital, Miyazaki, Japan
| | - Yujiro Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
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6
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Kuga N, Kuroiwa Y, Sakamoto T, Yamashita A, Gi T, Doi S, Kinoshita T, Tanaka T, Kihara Y, Asada Y, Imamura T. Signal Change of Jugular Vein Thrombus on Diffusion-Weighted Magnetic Resonance Imaging. Circ Rep 2020; 2:455-456. [PMID: 33693269 PMCID: PMC7819652 DOI: 10.1253/circrep.cr-20-0039] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Naoya Kuga
- Department of Radiological Technology, Koga General Hospital Miyazaki Japan
| | - Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital Miyazaki Japan.,Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
| | | | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
| | - Toshihiro Gi
- Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
| | - Shogo Doi
- Department of Radiological Technology, Koga General Hospital Miyazaki Japan
| | - Tomoki Kinoshita
- Department of Radiological Technology, Koga General Hospital Miyazaki Japan
| | - Takashi Tanaka
- Department of Radiology, Koga General Hospital Miyazaki Japan
| | - Yasushi Kihara
- Department of Radiology, Koga General Hospital Miyazaki Japan
| | - Yujiro Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki Miyazaki Japan
| | - Takuroh Imamura
- Department of Internal Medicine, Koga General Hospital Miyazaki Japan
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7
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Doi S, Kuroiwa Y, Kusumoto K, Yamashita A, Furukoji E, Tai H, Kihara Y, Hirai T, Asada Y, Imamura T. Therapeutic response of immunoglobulin 4-related aortitis and pancreatitis demonstrated by diffusion-weighted MRI. Radiol Case Rep 2019; 14:1132-1135. [PMID: 31360274 PMCID: PMC6637269 DOI: 10.1016/j.radcr.2019.06.020] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/08/2019] [Accepted: 06/27/2019] [Indexed: 01/13/2023] Open
Abstract
Immunoglobulin (IgG) 4-related disease is a systemic inflammatory disease, and it affects vascular system as aortitis, periaortitis, or aneurysm. However, due to a lack of serum biomarker on aortic damage and the multiorgan involvement, it is difficult to assess aortic inflammatory activity of IgG4-related disease. We described a case of IgG4-related pancreatitis and aortitis, which was visualized with magnetic resonance merged image of diffusion weighted and T1 weighted images. The aortic signal intensity or apparent diffusion coefficient value reduced or increased after oral prednisone administration, respectively. Magnetic resonance diffusion weighted image and apparent diffusion coefficient may be a useful imaging tool for assessment of vascular inflammation in IgG4-related aortitis.
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Affiliation(s)
- Shogo Doi
- Department of Radiological Technology, Koga General Hospital, Miyazaki, Japan
| | - Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital, Miyazaki, Japan.,Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Kazunori Kusumoto
- Department of Internal Medicine, Koga General Hospital, Miyazaki, Japan
| | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Eiji Furukoji
- Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hiroshi Tai
- Department of Internal Medicine, Koga General Hospital, Miyazaki, Japan
| | - Yasushi Kihara
- Department of Radiology, Koga General Hospital, Miyazaki, Japan
| | - Toshinori Hirai
- Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Yujiro Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Takuroh Imamura
- Department of Internal Medicine, Koga General Hospital, Miyazaki, Japan
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8
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Kuroiwa Y, Uchida A, Yamashita A, Miyati T, Maekawa K, Gi T, Noguchi T, Yasuda S, Imamura T, Asada Y. Coronary high-signal-intensity plaques on T 1-weighted magnetic resonance imaging reflect intraplaque hemorrhage. Cardiovasc Pathol 2019; 40:24-31. [PMID: 30797186 DOI: 10.1016/j.carpath.2019.01.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Revised: 12/03/2018] [Accepted: 01/07/2019] [Indexed: 01/01/2023] Open
Abstract
Coronary high-signal-intensity plaques (HIPs) detected by T1-weighted magnetic resonance imaging are associated with future cardiovascular events. This study aimed to identify pathological findings reflecting HIPs in coronary arteries obtained from autopsy cases. Formalin-fixed hearts were imaged with noncontrast T1-weighted imaging with a 1.5-T magnetic resonance system. We defined HIPs or non-HIPs as a coronary plaque to myocardial signal intensity ratio (PMR) of ≥1.4 or <1.4, respectively. We found HIPs in 4 of 37 (10.8%) hearts and analyzed 7 hearts in detail. The corresponding sections to HIPs (n=11) or non-HIPs (n=25) were histologically and immunohistochemically analyzed. We calculated the T1 relaxation time of human venous blood in vitro. Plaque and necrotic core areas, and the frequency of intraplaque hemorrhage in HIPs were significantly larger/higher than those in non-HIPs. HIPs were immunopositive for CD68 (11/11), glycophorin A (10/11), and fibrin (11/11). Glycophorin-A-, matrix metalloprotease 9 (MMP9)-, and tissue factor-immunopositive areas were larger in HIPs than in non-HIPs. The PMR was positively correlated with glycophorin-A-, fibrin-, MMP9-, and tissue factor-immunopositive areas. Blood coagulation shortened the T1 relaxation time of the blood and plasma, and the T1 relaxation times in coagulated whole blood and erythrocyte-rich blood were significantly shorter than those in plasma. Coronary HIPs may reflect intraplaque hemorrhage and may be a novel marker for plaque instability and thrombogenic potential.
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Affiliation(s)
- Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital, 1749-4 Sudaki, Ikeuchi, Miyazaki 880-0041, Japan; Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Akiko Uchida
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan.
| | - Tosiaki Miyati
- Faculty of Health Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 5-11-80 Kodatsuno, Kanazawa 920-0942, Japan
| | - Kazunari Maekawa
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Toshihiro Gi
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Teruo Noguchi
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 5-7-1 Fujishiro-dai, Suita, Osaka 565-8565, Japan
| | - Satoshi Yasuda
- Department of Cardiovascular Medicine, National Cerebral and Cardiovascular Center, 5-7-1 Fujishiro-dai, Suita, Osaka 565-8565, Japan
| | - Takuroh Imamura
- Department of Internal Medicine, Koga General Hospital, 1749-4 Sudaki, Ikeuchi, Miyazaki 880-0041, Japan
| | - Yujiro Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
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9
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Affiliation(s)
- M. Kowaka
- The Research Laboratories of Kirin Brewery Co., Ltd., Takasaki, Gumma Pref., Japan
| | - E. Kokubo
- The Research Laboratories of Kirin Brewery Co., Ltd., Takasaki, Gumma Pref., Japan
| | - Y. Kuroiwa
- The Research Laboratories of Kirin Brewery Co., Ltd., Takasaki, Gumma Pref., Japan
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10
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Yamashita A, Kuroiwa Y, Uchida A, Maekawa K, Gi T, Imamura T, Asada Y. Abstract 236: Magnetic Resonance T1 High Signal Intensity in Coronary Atherosclerotic Plaques Reflects Intraplaque Hemorrhage-derived Erythrocyte Content. Arterioscler Thromb Vasc Biol 2018. [DOI: 10.1161/atvb.38.suppl_1.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective:
Acute myocardial infarction is triggered by plaque disruption and thrombus formation, therefore, it is important to detect high thrombotic risk plaque non-invasively. Coronary high signal intensity plaque (HIP) on T1 weighted magnetic resonance imaging (T1WI) was associated with future coronary events. The aim of this study is to identify pathological findings reflecting HIPs using hearts obtained from autopsy cases and blood samples.
Approach and Results:
Formalin-fixed hearts (n=7) were imaged with non-contrast T1WI with a 1.5 T magnetic resonance system. We defined HIPs (n=11) or non-HIPs (n=25) as a coronary plaque to myocardial signal intensity ratio (PMR) of √ 1.4 or √ 1.4, respectively. The corresponding histological sections were histologically and immunohistochemically analyzed. Plaque and necrotic core areas or frequency of intraplaque hemorrhage in HIPs were significantly larger or higher than those in non-HIPs. The high intensity portion in large coronary plaque was immunopositive for CD68, CD163, glycophorin A, and fibrin. Glycophorin A-, matrix metalloprotease (MMP) 9-, tissue factor-immunopositive areas were larger in HIPs than those in non-HIPs. Glycophorin A-, fibrin-, MMP9-, and tissue factor-immunopositive areas were positively correlated with PMR. We calculated T1 relaxation time of venous blood, plasma, and erythrocyte-rich blood in vitro. Blood coagulation shortened T1 relaxation time of the blood and plasma, and T1 relaxation times in coagulated whole blood and erythrocyte-rich blood were significantly shorter than those in plasma.
Conclusions:
Majority of coronary HIPs may reflect intraplaque hemorrhage-derived erythrocyte content, and may be a novel marker for plaque instability and thrombogenic potential.
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11
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Kuroiwa Y, Yamashita A, Imamura T, Asada Y. [7. Basic Research and Clinical Applications of Magnetic Resonance Imaging: Qualitative Assessment of Cardiovascular Diseases]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2018; 74:599-605. [PMID: 29925755 DOI: 10.6009/jjrt.2018_jsrt_74.6.599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital
- Department of Pathology, Faculty of Medicine, University of Miyazaki
| | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki
| | | | - Yujiro Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki
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12
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Goto Y, Nishida A, Nishiate H, Murata M, Lee CH, Miura A, Moriyoshi C, Kuroiwa Y, Mizuguchi Y. Effect of Te substitution on crystal structure and transport properties of AgBiSe2thermoelectric material. Dalton Trans 2018; 47:2575-2580. [DOI: 10.1039/c7dt04821a] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reduced lattice thermal conductivity of Te-substituted AgBiSe2was qualitatively described using the point defect scattering model.
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Affiliation(s)
- Y. Goto
- Department of Physics
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - A. Nishida
- Department of Physics
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
| | - H. Nishiate
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - M. Murata
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - C. H. Lee
- National Institute of Advanced Industrial Science and Technology (AIST)
- Tsukuba
- Japan
| | - A. Miura
- Faculty of Engineering
- Hokkaido University
- Sapporo
- Japan
| | - C. Moriyoshi
- Department of Physical Science
- Hiroshima University
- Hiroshima 739-8526
- Japan
| | - Y. Kuroiwa
- Department of Physical Science
- Hiroshima University
- Hiroshima 739-8526
- Japan
| | - Y. Mizuguchi
- Department of Physics
- Tokyo Metropolitan University
- Hachioji 192-0397
- Japan
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13
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Kimura K, Inoue K, Kuroiwa Y, Tanaka F, Takada M. Propagated but topologically distributed forebrain neurons expressing alpha-synuclein in aged macaques. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.518] [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: 11/17/2022]
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14
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Kawaguchi S, Takemoto M, Osaka K, Nishibori E, Moriyoshi C, Kubota Y, Kuroiwa Y, Sugimoto K. High-throughput powder diffraction measurement system consisting of multiple MYTHEN detectors at beamline BL02B2 of SPring-8. Rev Sci Instrum 2017; 88:085111. [PMID: 28863664 DOI: 10.1063/1.4999454] [Citation(s) in RCA: 107] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study, we developed a user-friendly automatic powder diffraction measurement system for Debye-Scherrer geometry using a capillary sample at beamline BL02B2 of SPring-8. The measurement system consists of six one-dimensional solid-state (MYTHEN) detectors, a compact auto-sampler, wide-range temperature control systems, and a gas handling system. This system enables to do the automatic measurement of temperature dependence of the diffraction patterns for multiple samples. We introduced two measurement modes in the MYTHEN system and developed new attachments for the sample environment such as a gas handling system. The measurement modes and the attachments can offer in situ and/or time-resolved measurements in an extended temperature range between 25 K and 1473 K and various gas atmospheres and pressures. The results of the commissioning and performance measurements using reference materials (NIST CeO2 674b and Si 640c), V2O3 and Ti2O3, and a nanoporous coordination polymer are presented.
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Affiliation(s)
- S Kawaguchi
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - M Takemoto
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - K Osaka
- Industrial Application Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
| | - E Nishibori
- Faculty of Pure and Applied Sciences, TIMS and CiRfSE, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - C Moriyoshi
- Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - Y Kubota
- Department of Physical Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Y Kuroiwa
- Graduate School of Science, Hiroshima University, Higashihiroshima, Hiroshima 739-8526, Japan
| | - K Sugimoto
- Research and Utilization Division, Japan Synchrotron Radiation Research Institute (JASRI), SPring-8, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198, Japan
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Shiiba T, Kuga N, Kuroiwa Y, Sato T. Evaluation of the accuracy of mono-energetic electron and beta-emitting isotope dose-point kernels using particle and heavy ion transport code system: PHITS. Appl Radiat Isot 2017; 128:199-203. [PMID: 28735112 DOI: 10.1016/j.apradiso.2017.07.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 05/25/2017] [Accepted: 07/14/2017] [Indexed: 10/19/2022]
Abstract
We assessed the accuracy of mono-energetic electron and beta-emitting isotope dose-point kernels (DPKs) calculated using the particle and heavy ion transport code system (PHITS) for patient-specific dosimetry in targeted radionuclide treatment (TRT) and compared our data with published data. All mono-energetic and beta-emitting isotope DPKs calculated using PHITS, both in water and compact bone, were in good agreement with those in literature using other MC codes. PHITS provided reliable mono-energetic electron and beta-emitting isotope scaled DPKs for patient-specific dosimetry.
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Affiliation(s)
- Takuro Shiiba
- Department of Radiological Technology, Faculty of Fukuoka Medical Technology, Teikyo University, 6-22 Misakimachi, Omuta, Fukuoka 836-8505, Japan.
| | - Naoya Kuga
- Department of Radiological Technology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki 880-0041, Japan
| | - Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital, 1749-1 Sudaki, Ikeuchi-cho, Miyazaki 880-0041, Japan; Department of Pathology, Faculty of Medicine, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki, Miyazaki 889-1692, Japan
| | - Tatsuhiko Sato
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Shirakata 2-4, Tokai, Ibaraki 319-1195, Japan
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Gi T, Yamashita A, Kuroiwa Y, Konishi Y, Asanuma T, Imamura T, Asada Y. Abstract 511: High Signal Intensity on Diffusion Weighted Magnetic Resonance Imaging Reflects Acuity of Deep Vein Thrombus. Arterioscler Thromb Vasc Biol 2017. [DOI: 10.1161/atvb.37.suppl_1.511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective:
Acuity of deep vein thrombus/ thrombosis (DVT) may affect effectiveness of anti-thrombotic therapy. However, the acuity of DVT is not reliably detected by current noninvasive imaging techniques. This study investigated whether diffusion weighted magnetic resonance (MR) imaging can detect DVT and define the acuity of thrombus in patients with DVT and a rabbit model of venous thrombus.
Methods:
Diffusion weighted MR imaging was performed with a 1.5-T MR system in 8 patients with DVT. Venous thrombus was induced in rabbit jugular vein by endothelial denudation and 10 minutes blood stasis with a balloon catheter. The thrombus was imaged with a 3.0-T MR system at 4 hours and at 1, 2 and 3 weeks, and the jugular veins were histologically assessed.
Results:
All patients were detected DVT with diffusion weighted MR imaging, and the DVT showed high or mixed high and iso signal intensity on the diffusion sequence. The rabbit venous thrombi were rich in erythrocyte and fibrin at 4 hours, and showed focal organizing reaction at 1 and 2 weeks, and was replaced by fibrous tissue at 3 weeks. The rabbit thrombi showed high signal intensity on diffusion weighted MR imaging at 4 hours, mixed high and iso signal intensity at 1 and 2 weeks, or mixed iso and low signal intensity at 3 weeks. The signal intensity was positively correlated with erythrocyte and fibrin contents, and negatively correlated with macrophage and collagen contents.
Conclusions:
Diffusion weighted MR imaging can detect DVT and high signal intensity on the sequence may reflect acuity of DVT.
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Affiliation(s)
- Toshihiro Gi
- Faculty of Medicine, Univ of Miyazaki, Miyazaki, Japan
| | | | | | - Yuko Konishi
- Faculty of Veterinary Medicine, Univ of Miyazaki, Miyazaki, Japan
| | | | | | - Yujiro Asada
- Faculty of Medicine, Univ of Miyazaki, Miyazaki, Japan
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17
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Taniguchi S, Kurita K, Kuroiwa Y, Tsuji C. A longitudinal study of coronectomy over five to nine years postoperation. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.943] [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: 11/29/2022]
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18
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Yoshida K, Yokoi T, Mori S, Achiwa M, Kuroiwa Y, Kurita K. Abnormal ossification of the hyoid bone in cleidocranial dysplasia rare case and literature review. Int J Oral Maxillofac Surg 2017. [DOI: 10.1016/j.ijom.2017.02.1263] [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: 12/01/2022]
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19
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Kuroiwa Y, Tai H, Yamashita A, Furukoji E, Kihara Y, Hirai T, Asada Y, Imamura T. High Signal Intensity in Arterial Walls on Diffusion-Weighted Magnetic Resonance Imaging in the Active Phase of Takayasu Arteritis. Circ J 2017; 81:1747-1748. [DOI: 10.1253/circj.cj-17-0079] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yasuyoshi Kuroiwa
- Department of Radiological Technology, Koga General Hospital
- Department of Pathology, Faculty of Medicine, University of Miyazaki
| | - Hiroshi Tai
- Department of Internal Medicine, Koga General Hospital
| | - Atsushi Yamashita
- Department of Pathology, Faculty of Medicine, University of Miyazaki
| | - Eiji Furukoji
- Department of Radiology, Faculty of Medicine, University of Miyazaki
| | | | - Toshinori Hirai
- Department of Radiology, Faculty of Medicine, University of Miyazaki
| | - Yujiro Asada
- Department of Pathology, Faculty of Medicine, University of Miyazaki
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20
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Konishi Y, Satoh H, Kuroiwa Y, Kusaka M, Yamashita A, Asada Y, Asanuma T. Application of fiber tractography and diffusion tensor imaging to evaluate spinal cord diseases in dogs. J Vet Med Sci 2016; 79:418-424. [PMID: 28025450 PMCID: PMC5326951 DOI: 10.1292/jvms.16-0504] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [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: 11/28/2022] Open
Abstract
Fiber tractography is a technique capable of depicting the three-dimensional structure
and connectivity of nerve fibers using serial magnetic resonance diffusion tensor imaging
(DTI). To establish fiber tractography and DTI methods in veterinary clinical medicine, we
evaluated fiber tractography and DTI parameters: apparent diffusion coefficient (ADC)
values and fractional anisotropy (FA) values, in various spinal cord diseases. Spinal cord
DTI was examined in 28 dogs with spinal cord diseases. The ADC and FA values were measured
at lesion sites and cranial normal sites on spinal cords, and both values of lesion sites
were compared with normal sites. In thoracolumbar intervertebral disk herniation (IVDH)
cases, depending on their neurologic grades, fiber tractography indicated rupture of fiber
trajectories, loss of neuronal bundles and disorder of fiber directions. In these cases,
the average ADC values at lesion sites significantly decreased compared with normal sites
(P=0.016). In the progressive myelomalacia case, the average ADC and FA
values of hyperintense swollen regions in T2WI decreased compared to both values in other
disease cases. Finally, in the meningioma case, the continuity of fiber trajectories
improved after the administration of an anticancer agent. This study suggests that fiber
tractography and DTI are useful in the diagnosis and prognosis of veterinary spinal cord
diseases.
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Affiliation(s)
- Yuko Konishi
- Laboratory of Veterinary Clinical Radiology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Miyazaki 889-2192, Japan
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21
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Kuroiwa Y, Nishioka K, Yokota S, Hirai T, Nishioka K, Fujino K, Iguchi Y. Subacute autonomic, endocrine, and cognitive disorders in Japanese girls at puberty after human papillomavirus vaccination. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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22
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Hirai T, Iguchi Y, Uchiyama M, Kuroiwa Y, Nakamura I, Yokota S, Nishioka K. Single photon emission computed tomography findings after human papillomavirus (HPV) vaccination in Japan. Auton Neurosci 2015. [DOI: 10.1016/j.autneu.2015.07.407] [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: 11/27/2022]
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23
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Kurita K, Tsuji C, Kohara K, Goto S, Kuroiwa Y. Clinical evaluation of coronectomy cases deemed unfavorable within three years of the procedure. Int J Oral Maxillofac Surg 2015. [DOI: 10.1016/j.ijom.2015.08.205] [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: 10/22/2022]
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Kohara K, Kurita K, Kuroiwa Y, Goto S, Umemura E. Usefulness of mandibular third molar coronectomy assessed through clinical evaluation over three years of follow-up. Int J Oral Maxillofac Surg 2015; 44:259-66. [DOI: 10.1016/j.ijom.2014.10.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 09/02/2014] [Accepted: 10/03/2014] [Indexed: 11/27/2022]
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Chiba R, Kuroiwa Y, Higashi K, Yamamoto K, Moribe K. Characterization of as-synthesized mesoporous silica using NMR and solid-state fluorescence spectroscopy. J Drug Deliv Sci Technol 2014. [DOI: 10.1016/s1773-2247(14)50135-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sanjo N, Higuma M, Hizume M, Nakamura Y, Kitamoto T, Yamada M, Hamaguchi T, Moriwaka F, Aoki M, Kuroiwa Y, Nishizawa M, Takeda M, Inuzuka T, Abe K, Murai H, Murayama S, Satoh K, Harada M, Saito N, Takumi I, Sakai K, Nozaki I, Noguchi-Shinohara M, Koyano S, Yokoseki A, Yoshiyama K, Takao M, Hayashi Y, Mizusawa H. Human prion diseases in Japan: A prospective surveillance from 1999. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.1128] [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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27
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Takayanagi S, Amaha M, Satake K, Kuroiwa Y, Igarashi H, Murata A. STUDIES ON FROZEN BEER PRECIPITATES I. FORMATION AND GENERAL CHARACTERS. Journal of the Institute of Brewing 2013. [DOI: 10.1002/j.2050-0416.1969.tb03213.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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28
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Kuroda K, Miyahara H, Ye M, Eremeev SV, Koroteev YM, Krasovskii EE, Chulkov EV, Hiramoto S, Moriyoshi C, Kuroiwa Y, Miyamoto K, Okuda T, Arita M, Shimada K, Namatame H, Taniguchi M, Ueda Y, Kimura A. Experimental verification of PbBi2Te4 as a 3D topological insulator. Phys Rev Lett 2012; 108:206803. [PMID: 23003165 DOI: 10.1103/physrevlett.108.206803] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Indexed: 06/01/2023]
Abstract
The experimental evidence is presented of the topological insulator state in PbBi2Te4. A single surface Dirac cone is observed by angle-resolved photoemission spectroscopy with synchrotron radiation. Topological invariants Z2 are calculated from the ab initio band structure to be 1;(111). The observed two-dimensional isoenergy contours in the bulk energy gap are found to be the largest among the known three-dimensional topological insulators. This opens a pathway to achieving a sufficiently large spin current density in future spintronic devices.
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Affiliation(s)
- K Kuroda
- Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan
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Miyatake S, Miyake N, Touho H, Nishimura-Tadaki A, Kondo Y, Okada I, Tsurusaki Y, Doi H, Sakai H, Saitsu H, Shimojima K, Yamamoto T, Higurashi M, Kawahara N, Kawauchi H, Nagasaka K, Okamoto N, Mori T, Koyano S, Kuroiwa Y, Taguri M, Morita S, Matsubara Y, Kure S, Matsumoto N. Homozygous c.14576G>A variant of RNF213 predicts early-onset and severe form of moyamoya disease. Neurology 2012; 78:803-10. [PMID: 22377813 DOI: 10.1212/wnl.0b013e318249f71f] [Citation(s) in RCA: 212] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE RNF213 was recently reported as a susceptibility gene for moyamoya disease (MMD). Our aim was to clarify the correlation between the RNF213 genotype and MMD phenotype. METHODS The entire coding region of the RNF213 gene was sequenced in 204 patients with MMD, and corresponding variants were checked in 62 pairs of parents, 13 mothers and 4 fathers of the patients, and 283 normal controls. Clinical information was collected. Genotype-phenotype correlations were statistically analyzed. RESULTS The c.14576G>A variant was identified in 95.1% of patients with familial MMD, 79.2% of patients with sporadic MMD, and 1.8% of controls, thus confirming its association with MMD, with an odds ratio of 259 and p < 0.001 for either heterozygotes or homozygotes. Homozygous c.14576G>A was observed in 15 patients but not in the controls and unaffected parents. The incidence rate for homozygotes was calculated to be >78%. Homozygotes had a significantly earlier age at onset compared with heterozygotes or wild types (median age at onset 3, 7, and 8 years, respectively). Of homozygotes, 60% were diagnosed with MMD before age 4, and all had infarctions as the first symptom. Infarctions at initial presentation and involvement of posterior cerebral arteries, both known as poor prognostic factors for MMD, were of significantly higher frequency in homozygotes than in heterozygotes and wild types. Variants other than c.14576G>A were not associated with clinical phenotypes. CONCLUSIONS The homozygous c.14576G>A variant in RNF213 could be a good DNA biomarker for predicting the severe type of MMD, for which early medical/surgical intervention is recommended, and may provide a better monitoring and prevention strategy.
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Affiliation(s)
- S Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Johkura K, Nakae Y, Kudo Y, Yoshida TN, Kuroiwa Y. Early diffusion MR imaging findings and short-term outcome in comatose patients with hypoglycemia. AJNR Am J Neuroradiol 2012; 33:904-9. [PMID: 22268090 DOI: 10.3174/ajnr.a2903] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The relationship between the MR imaging features and clinical outcomes in patients with hypoglycemic encephalopathy has always been evaluated retrospectively. The aim of this study was to prospectively evaluate whether MR imaging features of patients presenting with hypoglycemic coma are predictive of short-term (1-week) outcomes. MATERIALS AND METHODS Subjects were 36 consecutive patients with hypoglycemia who were in a comatose state on arrival at our hospital from April 2006 to March 2010. MR imaging findings on arrival in relation to the patients' clinical course after glucose infusion were evaluated. RESULTS Thirteen of the 36 patients showed no MR imaging abnormalities on arrival. DWI revealed focal lesions involving the internal capsule in 13 patients and lesions involving bilateral hemispheric white matter in 10 patients. After glucose administration, the patients without lesions and patients with focal internal capsule lesions recovered completely within 1 day. However, patients with diffuse white matter lesions did not recover even within 1 week despite glucose administration. There was no statistical difference in the initial blood glucose levels among patients with the various types of MR imaging findings. CONCLUSIONS On early MR imaging, hypoglycemic brain injury may first appear in the internal capsule and then spread into the hemispheric white matter. The absence of a lesion or the presence of a focal internal capsule lesion may suggest a good outcome. However, diffuse hemispheric white matter lesions may indicate a poor 1-week outcome.
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Affiliation(s)
- K Johkura
- Department of Neurology and Stroke Center, Hiratsuka Kyosai Hospital, 9 –11 Oiwake, Hiratsuka 254-8502, Japan.
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Kuroiwa Y, Yamashita A, Miyati T, Furukoji E, Takahashi M, Azuma T, Sugimura H, Asanuma T, Tamura S, Kawai K, Asada Y. MR signal change in venous thrombus relates organizing process and thrombolytic response in rabbit. Magn Reson Imaging 2011; 29:975-84. [DOI: 10.1016/j.mri.2011.04.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 04/18/2011] [Accepted: 04/22/2011] [Indexed: 10/18/2022]
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Moriyoshi C, Matsuoka Y, Sato H, Sasai R, Kuroiwa Y. Crystal structure of anion exchangeable Mg2+-Al3+layered double hydroxides. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311081803] [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: 11/10/2022] Open
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33
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Kuroiwa Y, Ohkubo H, Moriyoshi C, Inoue N, Okamoto T. Crystal structure of BaTiO 3-based ceramics in MLCCs under applied high voltage. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311081815] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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34
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Taji K, Moriyoshi C, Kuroiwa Y, Moriwake H, Bhattacharjee S, Pandey D. Origin of giant tetragonal lattice strain in (1− x)BiFeO 3- xPbTiO 3system. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311081827] [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: 11/11/2022] Open
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35
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Johkura K, Susuki K, Hakii Y, Kawauchi Y, Hasegawa O, Kuroiwa Y. Reversible CT findings in systemic lupus erythematosus. Eur J Neurol 2011. [DOI: 10.1111/j.1468-1331.1997.tb00418.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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36
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Baba Y, Kuroiwa Y, Ikeda Y, Ootaka T, Kawashima M, Inoe M, Sugita H. P24-16 An EEG study on healthy human subjects while watching the 3D video contents on the 3D display. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)61013-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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37
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Uematsu E, Kishida H, Iwahashi Y, Koyano S, Baba Y, Kuroiwa Y. P5-4 Electrophysiological analysis of Myerson sign in Parkinson's disease. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60526-3] [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: 11/24/2022]
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38
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Ishino F, Kuroiwa Y, Miyoshi N, Kobayashi S, Kohda T, Kaneko-Ishino T. Subtraction-hybridization method for the identification of imprinted genes. Methods Mol Biol 2009; 181:101-12. [PMID: 12843444 DOI: 10.1385/1-59259-211-2:101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Imprinted genes show monoallelic expression from either the paternal or maternal genome (1,2), and their regulated expression is usually associated with the existence of parentally differentially methylated regions on genomic DNAs (3,4). Because of this, essentially two different approaches, using either cDNA or genomic DNA as starting material (5) have been developed for systematic isolation of imprinted genes. In this chapter, we describe a subtraction-hybridization method (6-8) as an example of the former approach. Both parthenogenetic embryos and androgenetic embryos (9,10) are the most suitable biological materials for the subtraction or detection of imprinted genes. However, it is difficult to obtain a large amount of such special materials because only a small number of these embryos develop to the d 10 stage (9,10). Thus, polymerase chain reaction (PCR)-based techniques, such as the differential display (11-13) and subtraction-hybridization methods, are necessary to accomplish this experiment. The subtraction-hybridization method has been successfully applied for isolation of both paternally expressed genes (Pegs) (6,14,15) and maternally expressed genes (Megs) (7), and it allows cDNA libraries to be made from a very small amount of biological material. We are convinced that this method can be applied in many fields of biological science.
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Affiliation(s)
- F Ishino
- Gene Research Center, Tokyo Institute of Technology, Yokohama, Japan
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Okinaka S, Reese HH, Katsuki S, Ueki K, Kuroiwa Y, Araki S, Shiraki H, Kurland LT. The prevalence of multiple sclerosis and other neurological diseases in Japan. Acta Neurol Scand 2009; 42:68-76. [PMID: 5909422 DOI: 10.1111/j.1600-0404.1966.tb02004.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Kuroiwa Y, Itoyama Y, Shibasaki H, Tobimatsu S, Igata A. Minimal record of disability in multiple sclerosis--application to Japanese patients. Acta Neurol Scand Suppl 2009; 101:100-4. [PMID: 6594899 DOI: 10.1111/j.1600-0404.1984.tb02560.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The Japanese version of Minimal Record of Disability in MS was applied to randomly selected Japanese MS cases in order to determine the applicability of the scales and also to get the general trends of the disabilities of Japanese MS. The scales did reflect impairment of functional systems, in which visual system was most severe. The average DSS was 4/10. Incapacity status or environment status were well correlated with impairment of pyramidal or bowel/bladder systems. They also correlated with DSS. Duration of the illness was correlated with the severity of impairment, disability or handicap. Accumulation of such a core data base may help in management of the MS problems in the world.
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Abstract
BACKGROUND In elderly people, chronic dizziness is endemic. However, chronic dizziness of unknown origin is difficult to assess. OBJECTIVE To investigate whether mild unrecognised benign paroxysmal positional vertigo (BPPV) is a cause of isolated chronic dizziness in the elderly. PATIENTS AND METHODS The prevalence of extremely weak, horizontal, direction changing apogeotropic positional nystagmus (HAPN) that had not been detected by conventional examination was evaluated in 200 patients with isolated chronic dizziness and in 155 age matched control subjects without dizziness. RESULTS A high prevalence of weak HAPN was found in patients with isolated chronic dizziness (98/200 (49.0%)) compared with the prevalence in control subjects without dizziness (25/155 (16.1%); p<0.0001). Symptoms improved in some patients by daily positional exercise for BPPV. CONCLUSION Because BPPV is the most common cause of dizziness in the elderly, and HAPN is a characteristic of horizontal canal BPPV, our findings suggest that mild persistent BPPV is a possible cause of chronic dizziness of otherwise unknown origin in the elderly.
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Affiliation(s)
- K Johkura
- Department of Neurology, Hiratsuka Kyosai Hospital, 9-11 Oiwake, Hiratsuka 254-8502, Japan.
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42
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Kuroiwa Y, Terado Y, Moriyoshi C, Aoyagi S, Nishibori E, Sakata M, Takata M. Thermal motion of atoms in cubic structure of perovskites and ferroelectric phase transitions. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308095330] [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: 11/11/2022] Open
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Takata M, Tanaka H, Kuroiwa Y, Moritomo Y, Kato K, Yoshida F. Electrostatic potential and electric field imaging by MEM powder diffraction data analysis. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308096992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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44
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Eguchi H, Kuroiwa Y, Matsui A, Sada M, Nagaya N, Kawano S. Intra-bone marrow cotransplantation of donor mesenchymal stem cells in pig-to-NOD/SCID mouse bone marrow transplantation facilitates short-term xenogeneic hematopoietic engraftment. Transplant Proc 2008; 40:574-7. [PMID: 18374132 DOI: 10.1016/j.transproceed.2008.02.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We directly injected porcine donor mesenchymal stem cells (MSC) into murine bone marrow (BM) cavities to examine the effects of intra-BM cotransplantation of MSC in pig-to-NOD/SCID mouse bone marrow transplantation (BMT) on xenogeneic engraftment. Porcine MSC prepared by aspiration of iliac BM of miniature swine were identified as CD90+CD29+CD45-CD31- and shown to differentiate into osteoblastocytes and adipocytes. A few weeks after expansion, MSC (1 x 10(6) cells/mouse) were directly injected with BM cells (30 x 10(6) cells/mouse) obtained from vertebrae through a microsyringe into BM cavities of both tibiae of NOD/SCID mice after 3-Gy total body irradiation. Controls were injected with only BM cells. Porcine chimerisms of BM cells of tibiae (injection site) and of femurs (non-injection site) in recipient mice were evaluated with porcine and murine cell markers using FACS. The chimerism of porcine class I+ cells at the injection site in the MSC group and the controls were 3.45%, 1.43%, and 0.17%, and 2.27%, 0.81%, and 0.1% at 1, 3, and 6 weeks, respectively. The chimerism at the noninjection site in the MSC group and the controls were 0.21%, 1.34%, and 0.11%, and 0.06%, 0.42%, and 0.09% at 1, 3, and 6 weeks, respectively. The total chimerisms of injection site in the MSC group to 6 weeks were significantly higher than those in the control group (1.60% vs 0.99%; P < .05), whereas the chimerism of the noninjection site in MSC group was remarkably higher at 3 weeks. In conclusion, intra-BM cotransplantation of porcine donor MSC in pig-to-NOD/SCID mouse BMT improved short-term xenogeneic engraftment, presumably due to humoral factors.
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Affiliation(s)
- H Eguchi
- Center for International Relations, Osaka University Graduate School of Medicine, Osaka, Japan.
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45
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Tasaki M, Umemura T, Maeda M, Ishii Y, Okamura T, Inoue T, Kuroiwa Y, Hirose M, Nishikawa A. Safety assessment of ellagic acid, a food additive, in a subchronic toxicity study using F344 rats. Food Chem Toxicol 2008; 46:1119-24. [DOI: 10.1016/j.fct.2007.10.043] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2007] [Revised: 10/05/2007] [Accepted: 10/21/2007] [Indexed: 10/22/2022]
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46
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Ohtani K, Usuda J, Ichinose S, Ishizumi T, Hirata T, Inoue T, Maehara S, Imai K, Kubota M, Tsunoda Y, Yamada M, Tsutsui H, Yamada K, Kuroiwa Y, Furukawa K, Okunaka T, Kato H. High expression of GADD-45α and VEGF induced tumor recurrence via upregulation of IL-2 after photodynamic therapy using NPe6. Int J Oncol 2008. [DOI: 10.3892/ijo.32.2.397] [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: 11/06/2022] Open
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47
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Ohtani K, Usuda J, Ichinose S, Ishizumi T, Hirata T, Inoue T, Maehara S, Imai K, Kubota M, Tsunoda Y, Yamada M, Tsutsui H, Yamada K, Kuroiwa Y, Furukawa K, Okunaka T, Kato H. High expression of GADD-45alpha and VEGF induced tumor recurrence via upregulation of IL-2 after photodynamic therapy using NPe6. Int J Oncol 2008; 32:397-403. [PMID: 18202762] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023] Open
Abstract
NPe6 is a novel second-generation photosensitizer used for photodynamic therapy (PDT). PDT using NPe6 and diode laser (664 nm) induces cell death, inflammatory reactions, immunological responses and damage to the microvasculature. In this study, we evaluated the influence of the immunological responses and of enhanced angiogenesis on the anti-tumor effect of NPe6-PDT using cytokine-overexpressing Lewis lung carcinoma (LLC), LLC-IL-2 cells both in vitro and in vivo. We showed by DNA microarray analysis in vitro that IL-2 and GADD-45alpha (growth arrest and DNA damage 45 alpha) mRNA expressions were induced by 3 h after NPe6-PDT applied at a dose killing 90% of the cells (LD90). IL-2-overexpressing cells (LLC/IL-2 cells) were resistant to the loss of clonogenicity as compared to the parental LLC cells in vitro. Furthermore, in female C57BL/6 mice, NPe6-PDT produced a cure rate of 66.7% in LLC tumors, whereas the cure rate was only 16.6% in LLC/IL-2 tumors, and overexpression of IL-2 caused failure of NPe6-PDT, with tumor recurrence, in vivo. These results suggest that IL-2 expression may play an unfavorable role in attenuation of the antitumor effect of NPe6-PDT. It has been reported that the expression of vascular endothelial growth factor (VEGF), in particular, may cause tumor recurrence after PDT and exert unfavorable effect in relation to attenuate the anti-tumor activity of PDT. Results of immunohistochemical analysis of LLC/IL-2 tumors have revealed that the expressions of GADD-45alpha and VEGF are induced in these tumors after PDT, and in particular, 12 h after PDT, the expression levels were much higher as compared with those in the LLC tumors. The results of our studies using in vitro and in vivo models suggest that the cell death caused by PDT was inhibited by induction of GADD-45alpha expression and that tumor recurrence was promoted by the enhancement of VEGF expression mediated by IL-2 upregulation. Therefore, it is speculated that the use of an IL-2 inhibitor may improve the efficacy of NPe6-PDT.
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Affiliation(s)
- K Ohtani
- Department of Surgery, Tokyo Medical University, 6-7-1 Nishishinjuku, Shinjuku-ku, Tokyo, Japan
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Okunaka T, Usuda J, Ichinose S, Hirata H, Ohtani K, Maehara S, Inoue T, Imai K, Kubota M, Tsunoda Y, Kuroiwa Y, Tsutsui H, Furukawa K, Nishio K, Kato H. A possible relationship between the anti-cancer potency of photodynamic therapy using the novel photosensitizer ATX-s10-Na(II) and expression of the vascular endothelial growth factor in vivo. Oncol Rep 2007; 18:679-83. [PMID: 17671719 DOI: 10.3892/or.18.3.679] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
ATX-s10-Na(II) is a novel second-generation photo-sensitizer for photodynamic therapy (PDT). PDT using ATX-s10 and diode laser (670 nm) induces an apoptotic response, inflammatory reaction, immune reaction and damage to the microvasculature. In particular, the vascular shut-down effect plays an important role in the anti-tumor activity of ATX-s10-PDT. It has been reported that PDT induces hypoxia and expression of the vascular endothelial growth factor (VEGF) via the hypoxia-inducible factor 1 (HIF1)-alpha pathway. We hypothesized that the expression of VEGF may cause tumor recurrence after PDT and exert unfavorable effect against the anti-tumor activity of ATX-s10-PDT. In this study, we showed by DNA microarray analysis in vitro that VEGF mRNA expression was induced 3 h after laser irradiation in ATX-s10-PDT. We compared the anti-tumor activity of ATX-s10-PDT against lung cancer cell lines SBC-3 and SBC-3/VEGF, the latter overexpressing VEGF; there was no significant difference in the sensitivity to the PDT between the two cell lines as assessed by clonogenic assay. Furthermore, no statistically significant difference in the anti-tumor effect of PDT, as measured by tumor cures, was found between SBC-3 and SBC-3/VEGF tumors in female Balb/c-nu/nu nude mice in vivo. In conclusion, ATX-s10-PDT may prevent tumor recurrence despite induction of VEGF and promotion of tumor angiogenesis, which are known to enhance tumor proliferation and survival.
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Affiliation(s)
- T Okunaka
- Respiratory Disease Center, Sanno Hospital, International University of Health and Welfare, Tokyo, Japan
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Abstract
Considerable progress has been made in methods for production of transgenic livestock; beginning with pronuclear microinjection over 20 years ago. New methods, including the use of viral vectors, sperm-mediated gene transfer and somatic cell cloning, have overcome many of the limitations of pronuclear microinjection. It is now possible to not only readily make simple insertional genetic modifications, but also to accomplish, more complex, homozygous gene targeting and artificial chromosome transfer in livestock.
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Affiliation(s)
- J M Robl
- Hematech Inc, Sioux Falls, SD 57106, USA.
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Shimamura M, Shimizu M, Yagami T, Funabashi T, Kimura F, Kuroiwa Y, Misu Y, Goshima Y. L-3,4-dihydroxyphenylalanine-induced c-Fos expression in the CNS under inhibition of central aromatic L-amino acid decarboxylase. Neuropharmacology 2006; 50:909-16. [PMID: 16504219 DOI: 10.1016/j.neuropharm.2006.01.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2005] [Revised: 12/16/2005] [Accepted: 01/04/2006] [Indexed: 12/01/2022]
Abstract
L-3,4-dihydroxyphenylalanine (DOPA) is a neurotransmitter candidate. To map the DOPAergic system functionally, DOPA-induced c-Fos expression was detected under inhibition of central aromatic L-amino acid decarboxylase (AADC). In rats treated with a central AADC inhibitor, DOPA significantly increased the number of c-Fos-positive nuclei in the paraventricular nuclei (PVN) and the nucleus tractus solitarii (NTS), and showed a tendency to increase in the supraoptic nuclei (SON), but not in the striatum. On the other hand, DOPA with a peripheral AADC inhibitor elevated the level of c-Fos-positive nuclei in the four regions, suggesting that DOPA itself induces c-Fos expression in the SON, PVN and NTS. In rats treated with 6-hydroxydopamine (6-OHDA) to lesion the nigrostriatal dopamine (DA) pathway, DOPA significantly induced c-Fos expression in the four regions under the inhibition of peripheral AADC. However, under the inhibition of central AADC, DOPA did not significantly increase the number of c-Fos-positive nuclei in the four regions, suggesting that DOPA at least in part induces c-Fos expression through its conversion to DA. It was likely that the 6-OHDA lesion enhanced the response to DA, but attenuated that to DOPA itself. In conclusion, we proposed that the SON, PVN and NTS include target sites for DOPA itself.
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Affiliation(s)
- M Shimamura
- Department of Neurology, Yokohama City University Graduate School of Medicine, Yokohama 236-0004, Japan
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