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Minamisawa Y, Shirogane T, Watanabe I, Dezawa A. Histological analysis of nucleus pulposus tissue from patients with lumbar disc herniation after condoliase administration. JOR Spine 2024; 7:e1328. [PMID: 38577652 PMCID: PMC10988692 DOI: 10.1002/jsp2.1328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2023] [Revised: 02/29/2024] [Accepted: 03/10/2024] [Indexed: 04/06/2024] Open
Abstract
Background Condoliase is an enzyme used as a treatment for lumbar disc herniation (LDH). This enzyme degrades chondroitin sulfate (CS) in the nucleus pulposus of the intervertebral disc (IVD). However, there are cases in which symptoms do not improve, despite condoliase administration. This study reports histological analysis of lumbar disc tissue of LDH patients who underwent surgery because condoliase had no therapeutic effect. Methods Between March 2019 and August 2019, 12 LDH patients who underwent full endoscopic spine surgery (FESS) discectomy at the Dezawa Akira PED Clinic were the subjects of the study. There are two study groups: six cases underwent FESS after condoliase administration, while six underwent FESS without condoliase administration. The average duration from drug administration to surgery was 152 days. Herniated disc removed at surgery was evaluated by histological staining including immunohistochemistry by anti-CS antibodies. Results Multiple large clusters (40-120 μm in diameter) were observed in the nucleus pulposus of those who received condoliase, but no clusters were observed in those who did not. The lumbar disc tissues, including the nucleus pulposus of recipients, were stained with anti-CS antibodies that recognize the CS unsaturated disaccharide, but non-administration tissue was not stained. These findings suggest that the enzyme acted on the nucleus pulposus, even in cases where symptoms were not improved by condoliase administration. Furthermore, there was no histological difference between stained images of the extracellular matrix in those who did or did not receive condoliase, suggesting that condoliase acted specifically on CS in the nucleus pulposus. Conclusions We demonstrated that CS in the nucleus pulposus was degraded in patients in whom condoliase did not have a therapeutic effect. Moreover, condoliase acts in human IVD without causing necrosis of chondrocytes and surrounding tissues.
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Affiliation(s)
- Yuka Minamisawa
- Central Research LaboratoriesSeikagaku CorporationTokyoJapan
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Hisatomi T, Tachibana T, Mori K, Ishikawa K, Ishibashi T, Sonoda KH, Uchio E, Watanabe I, Suzuki K, Iida M. Injectable in situ cross-linking hyaluronan hydrogel for easier removal of posterior vitreous cortex in vitrectomy. Jpn J Ophthalmol 2024; 68:146-156. [PMID: 38311687 DOI: 10.1007/s10384-023-01039-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Accepted: 11/16/2023] [Indexed: 02/06/2024]
Abstract
PURPOSE Removing transparent vitreous tissues, such as a residual vitreous cortex (VC) or proliferative membrane, without damaging the retina is often problematic in vitrectomy. We examined the feasibility of an injectable in situ cross-linking hyaluronan hydrogel (XL-HA) for vitrectomy. STUDY DESIGN Experiments using ex vivo and in vivo animal models. METHODS HA-dibenzocyclooctyne and HA-azidoethylamine solutions were mixed to form XL-HA, which then gradually formed a hydrogel. We tested the function of XL-HA in ex vivo porcine eyes. We then examined the performance of XL-HA in in vivo rabbit models of posterior vitreous detachment, posterior VC removal, and proliferative vitreoretinopathy. RESULTS The ex vivo study showed that XL-HA rapidly embedded triamcinolone acetonide, mimicking VC attached to the retina, and became hard enough to be pinched with tweezers within 3 minutes, allowing us to remove only the triamcinolone acetonide without impairing the internal limiting membrane. In the in vivo rabbit models, XL-HA injection improved posterior vitreous detachment, and the thin and fragile posterior VC or fibrous proliferative membrane was readily peeled off without any damage to the underlying retina as compared with untreated controls. A short-term intraocular biocompatibility test demonstrated that the intraocular pressure remained normal with XL-HA injected into the eye. In addition, transmission electron microscopy showed no obvious abnormalities in the cornea or in the inner and outer retina. CONCLUSION The results indicate that XL-HA is a potential adjunctive device to help make vitrectomy safe, effective, and successful.
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Affiliation(s)
- Toshio Hisatomi
- Department of Ophthalmology, Fukuoka University Chikushi Hospital, 1-1-1 Zokumyoin, Chikushino, Fukuoka, 818-8502, Japan.
- Department of Ophthalmology, Faculty of Medicine, Fukuoka University, 8-19-1, Nanakuma, Fukuoka Jonan-ku, Fukuoka, 814-080, Japan.
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
| | - Takashi Tachibana
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kenichiro Mori
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Keijiro Ishikawa
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Tatsuro Ishibashi
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Koh-Hei Sonoda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Eiichi Uchio
- Department of Ophthalmology, Faculty of Medicine, Fukuoka University, 8-19-1, Nanakuma, Fukuoka Jonan-ku, Fukuoka, 814-080, Japan
| | - Ippei Watanabe
- Central Research Laboratory, Seikagaku Corporation, 1253, Tateno 3-chome, Higashiyamato-shi, Tokyo, 207-0021, Japan
- Medical Affairs, Seikagaku Corporation, 1-6-1 Marunouchi, Chiyoda-ku, Tokyo, 100-0005, Japan
| | - Kiyoshi Suzuki
- Central Research Laboratory, Seikagaku Corporation, 1253, Tateno 3-chome, Higashiyamato-shi, Tokyo, 207-0021, Japan
| | - Masami Iida
- Central Research Laboratory, Seikagaku Corporation, 1253, Tateno 3-chome, Higashiyamato-shi, Tokyo, 207-0021, Japan
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Suzuki K, Watanabe I, Tachibana T, Mori K, Ishikawa K, Ishibashi T, Uchio E, Sonoda KH, Hisatomi T. Development of in situ crosslinked hyaluronan as an adjunct to vitrectomy surgery. J Mater Sci Mater Med 2023; 34:56. [PMID: 37930485 PMCID: PMC10628021 DOI: 10.1007/s10856-023-06757-9] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023]
Abstract
Ophthalmologists have used hyaluronan (HA) products as adjuncts to ocular surgery since the 1970s. However, HA products are not always functional in surgeries of the posterior eye segment due to their lack of biomechanical strength. In this study, we developed an in situ crosslinked HA (XL-HA) and evaluated its potential as an adjunct to vitrectomy surgery in an in vitro model with a triamcinolone acetonide (TA) layer used as a pseudo residual vitreous cortex (RVC). Within a few minutes at concentrations over 0.9%, XL-HA, generated by the click chemistry of HA-dibenzocyclooctyne and HA-azidoethylamine, formed a hydrogel with the appropriate hardness for tweezers peeling. XL-HA (concentration, 0.76-1.73%) without dispersion successfully entered the TA layer and removed more than 45% of the total TA. Dynamic viscoelasticity helps to explain the rheological behavior of hydrogels, and the assessment results for XL-HA indicated that suitable concentrations were between 0.97% and 1.30%. For example, 1.30% XL-HA hydrogel reached sufficient hardness at 3 min for tweezers peeling, and the TA removal ability exceeded 70%. These results demonstrated that XL-HA was a potential adjunct to successful vitrectomy.
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Affiliation(s)
- Kiyoshi Suzuki
- Central Research Laboratories, Seikagaku Corporation, 1253, Tateno 3-chome, Higashiyamato-shi, Tokyo, 207-0021, Japan
| | - Ippei Watanabe
- Central Research Laboratories, Seikagaku Corporation, 1253, Tateno 3-chome, Higashiyamato-shi, Tokyo, 207-0021, Japan
- Medical Affairs, Seikagaku Corporation, 1-6-1 Marunouchi, Chiyoda-ku, Tokyo, 100-0005, Japan
| | - Takashi Tachibana
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Kenichiro Mori
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Keijiro Ishikawa
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Tatsuro Ishibashi
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Eiichi Uchio
- Department of Ophthalmology, Faculty of Medicine, Fukuoka University, 8-19-1, Nanakuma, Fukuoka Jonan-ku, Fukuoka, 814-080, Japan
| | - Koh-Hei Sonoda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan
| | - Toshio Hisatomi
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka, 812-8582, Japan.
- Department of Ophthalmology, Faculty of Medicine, Fukuoka University, 8-19-1, Nanakuma, Fukuoka Jonan-ku, Fukuoka, 814-080, Japan.
- Department of Ophthalmology, Fukuoka University Chikushi Hospital, 1-1-1 Zokumyoin, Chikushino-shi, Fukuoka, 818-8502, Japan.
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Mihara K, Kanemoto I, Sato K, Yasuhira Y, Watanabe I, Misumi K. Corrigendum to 'Echocardiographic evaluation of deformity and enlargement of the canine mitral valve annulus associated with myxomatous degenerative mitral valve disease' [J Vet Cardiol (2021) 37, 8-17]. J Vet Cardiol 2023; 45:1-2. [PMID: 36512887 DOI: 10.1016/j.jvc.2022.11.001] [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: 11/25/2022]
Affiliation(s)
- K Mihara
- Joint Graduate School of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 8900065, Japan; Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan.
| | - I Kanemoto
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - K Sato
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - Y Yasuhira
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - I Watanabe
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - K Misumi
- Joint Graduate School of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 8900065, Japan
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Kohsaka S, Ejiri K, Takagi H, Watanabe I, Gatate Y, Fukushima K, Nakano S, Hirai T. Diagnostic and Therapeutic Strategies for Stable Coronary Artery Disease Following the ISCHEMIA Trial. JACC Asia 2023; 3:15-30. [PMID: 36873769 PMCID: PMC9982228 DOI: 10.1016/j.jacasi.2022.10.013] [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] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 10/31/2022] [Accepted: 10/31/2022] [Indexed: 02/17/2023]
Abstract
Until recently, coronary revascularization with coronary artery bypass grafting or percutaneous coronary intervention has been regarded as the standard choice for stable coronary artery disease (CAD), particularly for patients with a significant burden of ischemia. However, in conjunction with remarkable advances in adjunctive medical therapy and a deeper understanding of its long-term prognosis from recent large-scale clinical trials, including ISCHEMIA (International Study of Comparative Health Effectiveness With Medical and Invasive Approaches), the approach to stable CAD has changed drastically. Although the updated evidence from recent randomized clinical trials will likely modify the recommendations for future clinical practice guidelines, there are still unresolved and unmet issues in Asia, where prevalence and practice patterns are markedly different from those in Western countries. Herein, the authors discuss perspectives on: 1) assessing the diagnostic probability of patients with stable CAD; 2) application of noninvasive imaging tests; 3) initiation and titration of medical therapy; and 4) evolution of revascularization procedures in the modern era.
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Key Words
- CABG, coronary artery bypass grafting
- CAD, coronary artery disease
- CTA, computed tomographic angiography
- DAPT, dual antiplatelet therapy
- EF, ejection fraction
- FFR, fractional flow reserve
- ICA, invasive coronary angiography
- IVUS, intravascular ultrasound
- LVEF, left ventricular ejection fraction
- OCT, optical coherent tomography
- OMT, optimal medical therapy
- PCI, percutaneous coronary intervention
- PTP, pretest probability
- RCT, randomized clinical trial
- noninvasive testing
- optimal medical therapy
- pretest probability
- revascularization
- stable coronary artery disease
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Affiliation(s)
- Shun Kohsaka
- Department of Cardiology, Keio University School of Medicine, Tokyo, Japan
| | - Kentaro Ejiri
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Hidenobu Takagi
- Department of Diagnostic Radiology, Tohoku University Hospital, Sendai, Japan
| | - Ippei Watanabe
- Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Yodo Gatate
- Department of Cardiology, Self-Defense Forces Central Hospital, Tokyo, Japan
| | - Kenji Fukushima
- Department of Radiology, Fukushima Medical University, Fukushima, Japan
| | - Shintaro Nakano
- Department of Cardiology, Saitama Medical University International Medical Center, Hidaka, Japan
| | - Taishi Hirai
- Department of Cardiology, University of Missouri, Columbia, Missouri, USA
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6
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Watanabe I, Miyanaga A, Hoshi H, Suzuki K, Eguchi T. Biochemical and crystallographic assessments of the effect of 4,
6‐
O
‐disulfated disaccharide moieties in chondroitin sulfate E on chondroitinase
ABC
I activity. FEBS J 2022; 290:2379-2393. [PMID: 36478634 DOI: 10.1111/febs.16685] [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] [Received: 09/20/2022] [Revised: 10/31/2022] [Accepted: 11/21/2022] [Indexed: 11/23/2022]
Abstract
O-sulfated N-acetyl-d-galactosamine (GalNAc) residues in chondroitin sulfate (CS) play a crucial role in chondroitinase ABC I (cABC-I) activity. CSA containing mainly 4-O-monosulfated GalNAc was a good substrate for the enzyme, but not CSE containing mainly 4,6-O-disulfated GalNAc [GalNAc(4S,6S)]. Each CS isomer exhibits structural heterogeneity; CSE has di-sulfated disaccharide units and mono-sulfated disaccharide units. Disaccharide composition analysis of digested products revealed that mono-sulfated disaccharide units in CSE contributed to the enzyme reactivity. Although enough substrate (CSA) was present in mixtures of CSA and CSE for reaction, the reactivity was reduced depending on the amount of CSE in the mixture. These results suggested that CSE is not only resistant to enzyme digestion but also attenuates enzyme activity. To understand the mechanism of action, crystallography of cABC-I in complex with unsaturated CSE-disaccharide, ΔDi-(4,6)S, was performed. Both 4-O- and 6-O-sulfate groups in ΔDi-(4,6)S interact with Arg500, suggesting that there was a greater interaction between ΔDi-(4,6)S and Arg500 than between mono-sulfated disaccharides and Arg500. Besides, this interaction attenuated enzyme activity by interfering with a function of Arg500, which is the charge neutralization of the carboxy group of D-glucuronic acid (GlcA) residues in CS. When interacting with the CSE-disaccharide unit [GlcAβ1-3GalNAc(4S,6S)] in CS, cABC-I cannot interact with other CS-disaccharide units until it has digested the CSE-disaccharide unit. The low reactivity of cABC-I with CSE is attributable to two suggested factors: (a) resistance of E-units in CSE molecules to digestion by cABC-I, and (b) tendency of E-units in CSE molecules to attenuate cABC-I activity.
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Affiliation(s)
- Ippei Watanabe
- Medical Affairs, Seikagaku Corporation, 1‐6‐1 Marunouchi, Chiyoda‐ku Tokyo 100‐0005 Japan
| | - Akimasa Miyanaga
- Department of Chemistry Tokyo Institute of Technology 2‐12‐1 O‐okayama, Meguro‐ku Tokyo 152‐8551 Japan
| | - Hirotaka Hoshi
- Central Research Laboratories, Seikagaku Corporation, 3‐1253 Tateno, Higashiyamato Tokyo 207‐0021 Japan
| | - Kiyoshi Suzuki
- Central Research Laboratories, Seikagaku Corporation, 3‐1253 Tateno, Higashiyamato Tokyo 207‐0021 Japan
| | - Tadashi Eguchi
- Department of Chemistry Tokyo Institute of Technology 2‐12‐1 O‐okayama, Meguro‐ku Tokyo 152‐8551 Japan
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7
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Jingliang M, Wang K, Murahari P, Yokoyama K, Lord JS, Pratt FL, He J, Schulz L, Willis M, Anthony JE, Morley NA, Nuccio L, Misquitta A, Dunstan DJ, Shimomura K, Watanabe I, Zhang S, Heathcote P, Drew AJ. Reply to: On the observation of photo-excitation effects in molecules using muon spin spectroscopy. Nat Mater 2022; 21:1110. [PMID: 33972763 DOI: 10.1038/s41563-021-01003-5] [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] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 04/01/2021] [Indexed: 06/12/2023]
Affiliation(s)
- M Jingliang
- School of Physics and Astronomy, Queen Mary University of London, London, UK
| | - K Wang
- School of Physics and Astronomy, Queen Mary University of London, London, UK
- College of Physical Sciences and Technology, Sichuan University, Chengdu, People's Republic of China
| | - P Murahari
- School of Physics and Astronomy, Queen Mary University of London, London, UK
| | - K Yokoyama
- School of Physics and Astronomy, Queen Mary University of London, London, UK
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot, UK
| | - J S Lord
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot, UK
| | - F L Pratt
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot, UK
| | - J He
- College of Physical Sciences and Technology, Sichuan University, Chengdu, People's Republic of China
| | - L Schulz
- College of Physical Sciences and Technology, Sichuan University, Chengdu, People's Republic of China
| | - M Willis
- College of Physical Sciences and Technology, Sichuan University, Chengdu, People's Republic of China
| | - J E Anthony
- Department of Chemistry, University of Kentucky, Lexington, KY, USA
| | - N A Morley
- Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
| | - L Nuccio
- Department of Physics, University of Fribourg, Fribourg, Switzerland
| | - A Misquitta
- School of Physics and Astronomy, Queen Mary University of London, London, UK
| | - D J Dunstan
- School of Physics and Astronomy, Queen Mary University of London, London, UK
| | - K Shimomura
- Materials and Life Science Division, J-PARC Center, Tokai, Japan
| | | | - S Zhang
- College of Physical Sciences and Technology, Sichuan University, Chengdu, People's Republic of China
| | - P Heathcote
- School of Biological and Chemical Sciences, Queen Mary University of London, London, UK.
| | - A J Drew
- School of Physics and Astronomy, Queen Mary University of London, London, UK.
- College of Physical Sciences and Technology, Sichuan University, Chengdu, People's Republic of China.
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot, UK.
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Watanabe I, Shirogane T, Matsuyama Y, Chiba K. Effect of contrast media on the enzyme activity of condoliase: In vitro assessment. JOR Spine 2022; 5:e1221. [PMID: 36203868 PMCID: PMC9520762 DOI: 10.1002/jsp2.1221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 06/22/2022] [Accepted: 07/24/2022] [Indexed: 11/09/2022] Open
Abstract
Background Condoliase has been used in Japan to treat patients with lumbar disc herniation by its injection into the nucleus pulposus. The injection of condoliase together with contrast media is prohibited; because there are no data whether contrast media have any effect on condoliase activity. This study aimed to elucidate the effects of contrast media on condoliase activity. Methods Condoliase with chondroitin sulfate (CS) and without CS were mixed with various contrast media (nonionic [iohexol or iotrolan]; ionic [amidotrizoic acid]). (i) The mixtures with CS were incubated at 37°C; (ii) the mixtures without CS were stored at 24°C for 60 min, followed by addition of CS to assess condoliase activity by measuring the amount of N-acetylhexosamines enzymatically cleaved from CS using Morgan-Elson method. Results (i) In the presence of CS, the ionic contrast media reduced condoliase activity within 10 min in a dose-dependent manner, and the nonionic contrast media had no effect on condoliase activity for at least 120 min. (ii) In the absence of CS, the ionic contrast media almost completely inactivated condoliase within 15 min, and the nonionic contrast media also reduced condoliase activity; the residual activity was 65% with iotrolan and 35% with iohexol at 60 min. Conclusions The ionic contrast media significantly reduced condoliase activity regardless of presence or absence of CS. Although the nonionic contrast media did not affect condoliase activity in the presence of CS, it reduced activity in the absence of CS. Mixing condoliase with contrast media, especially ionic type contrast media, should be avoided.
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Affiliation(s)
| | | | - Yukihiro Matsuyama
- Department of Orthopaedic Surgery Hamamatsu University School of Medicine Shizuoka Japan
| | - Kazuhiro Chiba
- Department of Orthopaedic Surgery National Defense Medical College Saitama Japan
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9
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Magnotti C, Cerqueira V, Villasante A, Romero J, Watanabe I, Oliveira R, Farias J, Merino O, Valdebenito, Figueroa E. Spermatological characteristics and effects of cryopreservation in Lebranche mullet spermatozoa (Mugil liza Valenciennes, 1836): first report of ultra-rapid freezing. Anim Reprod Sci 2022; 241:106986. [DOI: 10.1016/j.anireprosci.2022.106986] [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] [Received: 10/18/2021] [Revised: 04/14/2022] [Accepted: 05/01/2022] [Indexed: 11/26/2022]
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Watanabe I, Suzuki K, Nagata M, Matsushima H. Clinical Functionality of Dispersive OVDs: Improvement of One of the Properties of 3% Hyaluronic Acid and 4% Chondroitin Sulfate Combination. YAKUGAKU ZASSHI 2022; 142:401-411. [DOI: 10.1248/yakushi.21-00208] [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: 11/22/2022]
Affiliation(s)
| | | | - Mayumi Nagata
- Department of Ophthalmology, Dokkyo Medical University
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11
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Watanabe I. Properties of Monoclonal Antibodies Recognizing Chondroitin Sulfate E. TRENDS GLYCOSCI GLYC 2022. [DOI: 10.4052/tigg.2120.1j] [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: 11/20/2022]
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12
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Watanabe I. Properties of Monoclonal Antibodies Recognizing Chondroitin Sulfate E. TRENDS GLYCOSCI GLYC 2022. [DOI: 10.4052/tigg.2120.1e] [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: 11/20/2022]
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13
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Nakano S, Kohsaka S, Chikamori T, Fukushima K, Kobayashi Y, Kozuma K, Manabe S, Matsuo H, Nakamura M, Ohno T, Sawano M, Toda K, Ueda Y, Yokoi H, Gatate Y, Kasai T, Kawase Y, Matsumoto N, Mori H, Nakazato R, Niimi N, Saito Y, Shintani A, Watanabe I, Watanabe Y, Ikari Y, Jinzaki M, Kosuge M, Nakajima K, Kimura T. JCS 2022 Guideline Focused Update on Diagnosis and Treatment in Patients With Stable Coronary Artery Disease. Circ J 2022; 86:882-915. [DOI: 10.1253/circj.cj-21-1041] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [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: 12/11/2022]
Affiliation(s)
- Shintaro Nakano
- Cardiology, Saitama Medical University International Medical Center
| | | | | | - Kenji Fukushima
- Department of Radiology and Nuclear Medicine, Fukushima Medical University
| | | | - Ken Kozuma
- Cardiology, Teikyo University School of Medicine
| | - Susumu Manabe
- Cardiac Surgery, International University of Health and Welfare Mita Hospital
| | | | - Masato Nakamura
- Cardiovascular Medicine, Toho University Ohashi Medical Center
| | | | | | - Koichi Toda
- Cardiovascular Surgery, Osaka University Graduate School of Medicine
| | - Yasunori Ueda
- Cardiovascular Division, National Hospital Organization Osaka National Hospital
| | - Hiroyoshi Yokoi
- Cardiovascular Center, International University of Health and Welfare Fukuoka Sanno Hospital
| | - Yodo Gatate
- Cardiology, Self-Defense Forces Central Hospital
| | | | | | | | - Hitoshi Mori
- Cardiology, Saitama Medical University International Medical Center
| | | | | | - Yuichi Saito
- Cardiovascular Medicine, Chiba University School of Medicine
| | - Ayumi Shintani
- Medical Statistics, Osaka City University Graduate School of Medicine
| | - Ippei Watanabe
- Cardiovascular Medicine, Toho University School of Medicine
| | | | - Yuji Ikari
- Cardiology, Tokai University School of Medicine
| | | | | | - Kenichi Nakajima
- Functional Imaging and Artificial Intelligence, Kanazawa University
| | - Takeshi Kimura
- Cardiovascular Medicine, Kyoto University Graduate School of Medicine
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14
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Liao X, Chang E, Tang X, Watanabe I, Zhang R, Jeong HW, Adams RH, Jain MK. Cardiac macrophages regulate isoproterenol-induced Takotsubo-like cardiomyopathy. JCI Insight 2022; 7:156236. [PMID: 35132957 PMCID: PMC8855841 DOI: 10.1172/jci.insight.156236] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [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: 10/28/2021] [Accepted: 12/15/2021] [Indexed: 12/24/2022] Open
Abstract
Takotsubo syndrome (TTS) is an acute, stress-induced cardiomyopathy that occurs predominantly in women after extreme physical and/or emotional stress. To date, our understanding of the molecular basis for TTS remains unknown and, consequently, specific therapies are lacking. Myocardial infiltration of monocytes and macrophages in TTS has been documented in clinical studies. However, the functional importance of these findings remains poorly understood. Here, we show that a single high dose of isoproterenol (ISO) in mice induced a TTS-like cardiomyopathy phenotype characterized by female predominance, severe cardiac dysfunction, and robust myocardial infiltration of macrophages. Single-cell RNA-Seq studies of myocardial immune cells revealed that TTS-like cardiomyopathy is associated with complex activation of innate and adaptive immune cells in the heart, and macrophages were identified as the dominant immune cells. Global macrophage depletion (via clodronate liposome administration) or blockade of macrophage infiltration (via a CCR2 antagonist or in CCR2-KO mice) resulted in recovery of cardiac dysfunction in ISO-challenged mice. In addition, damping myeloid cell activation by HIF1α deficiency or exposure to the immunomodulatory agent bortezomib ameliorated ISO-induced cardiac dysfunction. Collectively, our findings identify macrophages as a critical regulator of TTS pathogenesis that can be targeted for therapeutic gain.
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Affiliation(s)
- Xudong Liao
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Eugene Chang
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Xinmiao Tang
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA.,Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Ippei Watanabe
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Rongli Zhang
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
| | - Hyun-Woo Jeong
- Max Planck Institute for Molecular Biomedicine, Department of Tissue Morphogenesis, Münster, Germany
| | - Ralf H Adams
- Max Planck Institute for Molecular Biomedicine, Department of Tissue Morphogenesis, Münster, Germany
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Harrington Heart and Vascular Institute, University Hospitals Cleveland Medical Center, Cleveland, Ohio, USA
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15
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Takashima M, Watanabe I, Miyanaga A, Eguchi T. Substrate specificity of Chondroitinase ABC I based on analyses of biochemical reactions and crystal structures in complex with disaccharides. Glycobiology 2021; 31:1571-1581. [PMID: 34392362 PMCID: PMC8684500 DOI: 10.1093/glycob/cwab086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 08/05/2021] [Accepted: 08/05/2021] [Indexed: 11/28/2022] Open
Abstract
Chondroitinase ABC I (cABC-I) is the enzyme which cleaves the β-1,4 glycosidic linkage of chondroitin sulfate (CS) by β-elimination. To elucidate more accurately the substrate specificity of cABC-I, we evaluated the kinetic parameters of cABC-I and its reactivity with CS isomers displaying less structural heterogeneity as substrates, e.g., approximately 90 percent of disaccharide units in Chondroitin sulfate A (CSA) or Chondroitin sulfate C (CSC) is D-glucuronic acid and 4-O-sulfated N-acetyl galactosamine (GalNAc) (A-unit) or D-glucuronic acid and 6-O-sulfated GalNAc (C-unit), respectively. cABC-I showed the highest reactivity to CSA and CSC among all CS isomers, and the kcat/Km of cABC-I was higher for CSA than for CSC. Next, we determined the crystal structures of cABC-I in complex with CS disaccharides, and analyzed the crystallographic data in combination with molecular docking data. Arg500 interacts with 4-O-sulfated and 6-O-sulfated GalNAc residues. The distance between Arg500 and the 4-O-sulfate group was 0.8 Å shorter than that between Arg500 and the 6-O-sulfated group. Moreover, it is likely that the 6-O-sulfated group is electrostatically repulsed by the nearby Asp490. Thus, we demonstrated that cABC-I has the highest affinity for the CSA richest in 4-O-sulfated GalNAc residues among all CS isomers. Recently, cABC-I was used to treat lumbar disc herniation. The results provide useful information to understand the mechanism of the pharmacological action of cABC-I.
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Affiliation(s)
- Makoto Takashima
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Ippei Watanabe
- Medical Affairs, Seikagaku Corporation, 1-6-1 Marunouchi, Chiyoda-ku, Tokyo 100-0005, Japan
| | - Akimasa Miyanaga
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Tadashi Eguchi
- Department of Chemistry, Tokyo Institute of Technology, 2-12-1 O-okayama, Meguro-ku, Tokyo 152-8551, Japan
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16
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Tang X, Wang P, Zhang R, Watanabe I, Chang E, Vinayachandran V, Nayak L, Lapping S, Liao S, Madera A, Sweet DR, Luo J, Fei J, Jeong HW, Adams RH, Zhang T, Liao X, Jain MK. KLF2 regulates neutrophil activation and thrombosis in cardiac hypertrophy and heart failure progression. J Clin Invest 2021; 132:147191. [PMID: 34793333 PMCID: PMC8803339 DOI: 10.1172/jci147191] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [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: 12/23/2020] [Accepted: 11/17/2021] [Indexed: 11/22/2022] Open
Abstract
It is widely recognized that inflammation plays a critical role in cardiac hypertrophy and heart failure. However, clinical trials targeting cytokines have shown equivocal effects, indicating the need for a deeper understanding of the precise role of inflammation and inflammatory cells in heart failure. Leukocytes from human subjects and a rodent model of heart failure were characterized by a marked reduction in expression of Klf2 mRNA. Using a mouse model of angiotensin II–induced nonischemic cardiac dysfunction, we showed that neutrophils played an essential role in the pathogenesis and progression of heart failure. Mechanistically, chronic angiotensin II infusion activated a neutrophil KLF2/NETosis pathway that triggered sporadic thrombosis in small myocardial vessels, leading to myocardial hypoxia, cell death, and hypertrophy. Conversely, targeting neutrophils, neutrophil extracellular traps (NETs), or thrombosis ameliorated these pathological changes and preserved cardiac dysfunction. KLF2 regulated neutrophil activation in response to angiotensin II at the molecular level, partly through crosstalk with HIF1 signaling. Taken together, our data implicate neutrophil-mediated immunothrombotic dysregulation as a critical pathogenic mechanism leading to cardiac hypertrophy and heart failure. This neutrophil KLF2-NETosis-thrombosis mechanism underlying chronic heart failure can be exploited for therapeutic gain by therapies targeting neutrophils, NETosis, or thrombosis.
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Affiliation(s)
- Xinmiao Tang
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Peiwei Wang
- Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Rongli Zhang
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Ippei Watanabe
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Eugene Chang
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Vinesh Vinayachandran
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Lalitha Nayak
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Stephanie Lapping
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Sarah Liao
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Annmarie Madera
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - David R Sweet
- Case Western Reserve University, Cleveland, United States of America
| | - Jiemeng Luo
- Cardiology, Minhang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai, China
| | - Jinsong Fei
- Cardiology, Minhang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai, China
| | - Hyun-Woo Jeong
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Ralf H Adams
- Department of Tissue Morphogenesis, Max-Planck-Institute for Molecular Biomedicine, Münster, Germany
| | - Teng Zhang
- Yueyang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xudong Liao
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Case Western Reserve University, Cleveland, United States of America
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17
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Mihara K, Kanemoto I, Sato K, Yasuhira Y, Watanabe I, Misumi K. Echocardiographic evaluation of deformity and enlargement of the canine mitral valve annulus associated with myxomatous degenerative mitral valve disease. J Vet Cardiol 2021; 37:8-17. [PMID: 34507141 DOI: 10.1016/j.jvc.2021.08.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 07/24/2021] [Accepted: 08/09/2021] [Indexed: 12/15/2022]
Abstract
INTRODUCTION/OBJECTIVES Quantitative evaluation of the morphology of the mitral valve annulus (MVA) in dogs with myxomatous mitral valve disease (MMVD) may improve the techniques of mitral valve plasty. This study aimed to compare the MVA morphology on echocardiography in normal dogs and dogs with MMVD and to compare the echocardiographic and intraoperative measurements of the MVA in dogs with MMVD. ANIMALS, MATERIALS AND METHODS The study population comprised 59 healthy dogs (control group) and 371 dogs with MMVD (MMVD group). The anterior-posterior diameter and transversal diameter (TD) of the MVA and the aortic annulus diameter were measured by echocardiography to calculate the mitral valve flattening ratio, mitral annulus area (MAA), mitral annulus circumference (MAC), contraction ratio of the MAA and aortic annulus area. In the MMVD group, the mitral annulus diameter (MAD) was macroscopically measured during mitral valve plasty. Areas and lengths were divided by the body surface area (BSA) and √BSA, respectively, for comparative analyses. RESULTS The systolic and diastolic anterior-posterior diameter/√BSA, transversal diameter/√BSA, MAA/BSA converted to a natural logarithm (Ln(MAA/BSA)), and MAC/√BSA was significantly higher in the MMVD group than the control group, whereas flattening ratio values and contraction ratio of the MAA was significantly lower. Neither the aortic annulus diameter /√BSA nor the Ln(aortic annulus area/BSA) significantly differed between groups. In the MMVD group, diastolic MAC/√BSA and MAA/BSA correlated significantly with the MAD/√BSA. CONCLUSIONS The MVA is larger and rounder in dogs with MMVD than controls. Two-dimensional echocardiographic measures of MAA and MAC correlate well with intraoperative measures of MAD.
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Affiliation(s)
- K Mihara
- Joint Graduate School of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 8900065, Japan; Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan.
| | - I Kanemoto
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - K Sato
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - Y Yasuhira
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - I Watanabe
- Chayagasaka Animal Hospital, 1-1-5 Shin-nishi, Chikusa-ku, Nagoya, 4640003, Japan
| | - K Misumi
- Joint Graduate School of Veterinary Medicine, Kagoshima University, 1-21-24 Korimoto, Kagoshima, 8900065, Japan
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18
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Watanabe I, Yoshioka K, Takahashi K, Hoshi H, Nagata M, Matsushima H, Suzuki K. Advances in Understanding the Mechanism of Ophthalmic Viscosurgical Device Retention in the Anterior Chamber or on the Corneal Surface during Ocular Surgery. Chem Pharm Bull (Tokyo) 2021; 69:595-599. [PMID: 34078806 DOI: 10.1248/cpb.c21-00116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Retention durability, especially in the eye, is one of the most important properties of ophthalmic viscosurgical devices (OVDs) during ocular surgery. However, the information on the physical properties of OVDs is insufficient to explain their retention durability. The purpose of this study is to clarify the mechanism of OVD retention to improve understanding of the behavior of OVDs during ocular surgery. To elucidate the mechanism of OVD retention, we have developed a new test method for measuring repulsive force. As a result, the maximum repulsive force of OVDs was positively and well correlated with the retention durability of investigated OVDs. Consequently, we demonstrated that the repulsive force could be used as an index of retention durability on the ocular surface and in the eye. We directly compared the intraocular retention durability of three OVDs (Shellgan, Viscoat, and Opegan-Hi) in ex vivo porcine eyes. Opegan-Hi was immediately removed from the anterior chamber, but Shellgan and Viscoat remained largely in the anterior chamber as determined by fluorescence imaging. These results showed that the intraocular retention behavior of OVDs was similar to their ocular surface behavior in our previous report, suggesting that retention durability is dependent on the OVD itself. The retention durability of Shellgan seemed to be higher than that of Viscoat, and the maximum repulsive force of Shellgan was 1.35-fold higher than that of Viscoat. Therefore, the repulsive force might be a useful index for assessing the difference in the retention durability between OVDs such as Shellgan and Viscoat.
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Affiliation(s)
| | | | | | | | - Mayumi Nagata
- Department of Ophthalmology, Dokkyo Medical University
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19
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Ota K, Nakanishi R, Hashimoto H, Okamura Y, Watanabe I, Yabe T, Okubo R, Ikeda T. Association between coronary artery calcium score on non-contrast chest computed tomography and all-cause mortality among patients with congestive heart failure. Heart Vessels 2021; 37:262-272. [PMID: 34292390 DOI: 10.1007/s00380-021-01906-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 01/05/2021] [Accepted: 07/09/2021] [Indexed: 12/19/2022]
Abstract
Coronary artery calcium (CAC) score is a robust prognostic tool to predict cardiac events. Although patients with congestive heart failure (CHF) occasionally undergo non-contrast computed tomography (NCCT), the prognostic utility of CAC by NCCT is not widely known. We aimed to determine if CAC measured on NCCT is associated with all-cause mortality (ACM) among patients with CHF. We identified 550 patients admitted due to CHF who underwent NCCT. Patients were categorized into three groups according to CAC scores 0, 1-999, and ≥ 1000. The multivariate Cox proportional hazards model was used to assess if CAC by NCCT was associated with ACM after adjusting for traditional coronary artery disease (CAD) risk factors, brain natriuretic peptide and left ventricular ejection fraction (LVEF). In a subset of 245 patients with invasive coronary angiography (ICA), the associations between CAC scores and ACM were assessed in the multivariate Cox proportional hazards model. Further, we assessed if CAC increased statin use at discharge. During a mean follow-up of 3.3 ± 3.1 years, ACM occurred in 168 patients (30.55%). Compared with patients with CAC 0, those with CAC ≥ 1000 (HR 1.564, 95% CI 0.969-2.524, P = 0.067) were more likely to experience ACM, while those with CAC score 1-999 (HR 0.971, 95% CI 0.673-1.399, P = 0.873) were not. Similarly, a trend toward significance was observed in patients with LVEF < 40% (HR 2.124, 95% CI 0.929-4.856, P = 0.074). In the sub-analysis, patients with CAC ≥ 1000 had increased ACM compared to those with CAC 0, only if ICA ≥ 50% (HR 3.668, 95% CI 1.141-11.797, P = 0.029). Multivariate logistic regression revealed that statin use at discharge was increased with ICA ≥ 50%, but not CAC. The CAC score measured by NCCT tended to be associated with ACM among CHF patients. Statin use was not increased by CAC on NCCT.
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Affiliation(s)
- Kyoko Ota
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Rine Nakanishi
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan.
| | - Hidenobu Hashimoto
- Division of Cardiovascular Medicine, Department of Internal Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Yuriko Okamura
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Ippei Watanabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Takayuki Yabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Ryo Okubo
- Division of Cardiovascular Medicine, Department of Internal Medicine, Faculty of Medicine, Toho University, Tokyo, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
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20
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Kohsaka S, Fukushima K, Watanabe I, Manabe S, Niimi N, Gatate Y, Sawano M, Nakano S. Contemporary Management of Stable Coronary Artery Disease - Implications of the ISCHEMIA Trial. Circ J 2021; 85:1919-1927. [PMID: 34148929 DOI: 10.1253/circj.cj-21-0345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Coronary artery disease (CAD) remains a leading cause of mortality and morbidity in developed countries. Although urgent revascularization is the cornerstone of management of acute coronary syndrome (ACS), for patients with stable CAD recent large-scale clinical trials indicate that a mechanical 'fix' of a narrowed artery is not obviously beneficial; ACS and stable CAD are increasingly recognized as different clinical entities. We review the perspectives on (1) modifying the diagnostic pathway of stable CAD with the incorporation of modern estimates of pretest probability, (2) non-imaging evaluations based on their availability, (3) the optimal timing of invasive coronary angiography and revascularization, and (4) the implementation of medical therapy during the work-up.
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Affiliation(s)
- Shun Kohsaka
- Department of Cardiology, Keio University School of Medicine
| | - Kenji Fukushima
- Department of Nuclear Medicine, Saitama Medical University International Medical Center
| | - Ippei Watanabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Susumu Manabe
- Department of Cardiac Surgery, University of International Health and Welfare, Narita Hospital
| | - Nozomi Niimi
- Department of Cardiology, Keio University School of Medicine
| | - Yodo Gatate
- Department of Cardiology, Saitama Medical University International Medical Center
| | - Mitsuaki Sawano
- Department of Cardiology, Tokyo Dental College, Ichikawa General Hospital
| | - Shintaro Nakano
- Department of Cardiology, Saitama Medical University International Medical Center
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21
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Tonolli PN, Martins WK, Junqueira HC, Silva MN, Severino D, Santacruz-Perez C, Watanabe I, Baptista MS. Lipofuscin in keratinocytes: Production, properties, and consequences of the photosensitization with visible light. Free Radic Biol Med 2020; 160:277-292. [PMID: 32810634 DOI: 10.1016/j.freeradbiomed.2020.08.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 07/03/2020] [Accepted: 08/01/2020] [Indexed: 12/15/2022]
Abstract
A dysfunction in the mitochondrial-lysosomal axis of cellular homeostasis is proposed to cause cells to age quicker and to accumulate lipofuscin. Typical protocols to mediate lipofuscinogenesis are based on the induction of the senescent phenotype either by allowing many consecutive cycles of cell division or by treating cells with physical/chemical agents such as ultraviolet (UV) light or hydrogen peroxide. Due to a direct connection with the physiopathology of age-related macular degeneration, lipofuscin that accumulates in retinal pigment epithelium (RPE) cells have been extensively studied, and the photochemical properties of RPE lipofuscin are considered as standard for this pigment. Yet, many other tissues such as the brain and the skin may prompt lipofuscinogenesis, and the properties of lipofuscin granules accumulated in these tissues are not necessarily the same as those of RPE lipofuscin. Here, we present a light-induced protocol that accelerates cell aging as judged by the maximization of lipofuscinogenesis. Photosensitization of cells previously incubated with nanomolar concentrations of 1,9-dimethyl methylene blue (DMMB), severely and specifically damages mitochondria and lysosomes, leading to a lipofuscin-related senescent phenotype. By applying this protocol in human immortalized non-malignant keratinocytes (HaCaT) cells, we observed a 2.5-fold higher level of lipofuscin accumulation compared to the level of lipofuscin accumulation in cells treated with a typical UV protocol. Lipofuscin accumulated in keratinocytes exhibited the typical red light emission, with excitation maximum in the blue wavelength region (~450 nm). Fluorescence lifetime image microscopy data showed that the keratinocyte lipofuscin has an emission lifetime of ~1.7 ns. Lipofuscin-loaded cells (but not control cells) generated a substantial amount of singlet oxygen (1O2) when irradiated with blue light (420 nm), but there was no 1O2 generation when excitation was performed with a green light (532 nm). These characteristics were compared with those of RPE cells, considering that keratinocyte lipofuscin lacks the bisretinoids derivatives present in RPE lipofuscin. Additionally, we showed that lipofuscin-loaded keratinocytes irradiated with visible light presented critical DNA damages, such as double-strand breaks and Fpg-sensitive sites. We propose that the DMMB protocol is an efficient way to disturb the mitochondrial-lysosomal axis of cellular homeostasis, and consequently, it can be used to accelerate aging and to induce lipofuscinogenesis. We also discuss the consequences of the lipofuscin-induced genotoxicity of visible light in keratinocytes.
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Affiliation(s)
- Paulo N Tonolli
- Universidade de São Paulo, Instituto de Quimica, Departamento de Bioquímica, São Paulo, SP, Brazil
| | - Waleska K Martins
- Universidade de São Paulo, Instituto de Quimica, Departamento de Bioquímica, São Paulo, SP, Brazil; Universidade Anhanguera de São Paulo (UNIAN-SP), São Paulo, SP, Brazil
| | - Helena C Junqueira
- Universidade de São Paulo, Instituto de Quimica, Departamento de Bioquímica, São Paulo, SP, Brazil
| | - Maryana N Silva
- Universidade Anhanguera de São Paulo (UNIAN-SP), São Paulo, SP, Brazil
| | - Divinomar Severino
- Universidade de São Paulo, Instituto de Quimica, Departamento de Bioquímica, São Paulo, SP, Brazil
| | - Carolina Santacruz-Perez
- Universidade de São Paulo, Instituto de Quimica, Departamento de Bioquímica, São Paulo, SP, Brazil
| | - I Watanabe
- Universidade de São Paulo, Instituto de Ciências Biométicas, São Paulo, SP, Brazil
| | - Mauricio S Baptista
- Universidade de São Paulo, Instituto de Quimica, Departamento de Bioquímica, São Paulo, SP, Brazil.
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22
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Watanabe I, Hoshi H, Suzuki K, Nagata M, Matsushima H. Quantitative Assessment of Ophthalmic Viscosurgical Devices on Visibility, Spreadability, and Durability as Corneal Wetting Agents for the Wet Shell Technique. Ophthalmol Ther 2020; 9:609-623. [PMID: 32613592 PMCID: PMC7406586 DOI: 10.1007/s40123-020-00273-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Indexed: 11/18/2022] Open
Abstract
Purpose To evaluate ophthalmic viscosurgical devices (OVDs) as corneal wetting agents for the wet shell technique, a common procedure in Japan to maintain the wettability of corneal surfaces. Methods We surveyed Japanese ophthalmologists to determine the current state of the wet shell technique. After developing three ex vivo testing methods, we evaluated the corneal wetting properties of OVDs including 3% hyaluronic acid (HA) solution and OVD products, Opegan, Opelead, Viscoat, Shellgan, Discovisc, and Opegan-Hi. Results Overall, 214 ophthalmologists (70%) had performed the wet shell technique, and 91% of ophthalmologists who performed vitreous surgery had performed this technique. Using a questionnaire, we evaluated the performance of OVD as corneal wetting agents as follows: (i) visibility, smoothness of OVD surface; (ii) spreadability, coverage of the cornea; and (iii) retention durability, residual ratio of OVD on the corneal surface. The smoothness and spreadability of Opegan, Opelead, and 3% HA were superior to other OVDs. Adding an appropriate amount of balanced salt solution to the other OVDs improved smoothness and spreadability similar to that of Opelead or 3% HA. Shellgan and Viscoat, combination OVDs consisting of 3% HA and 4% chondroitin sulfate, showed high retention durability, resulting in remaining longer on the cornea compared with other OVDs. Conclusions Physical properties of OVDs tested in this study may provide useful information for ophthalmologists to select a suitable OVD when performing the wet shell technique.
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Affiliation(s)
- Ippei Watanabe
- Medical Affairs, Seikagaku Corporation, Chiyoda-ku, Tokyo, Japan.
| | - Hirotaka Hoshi
- Central Research Laboratories, Seikagaku Corporation, Higashiyamato-shi, Tokyo, Japan
| | - Kiyoshi Suzuki
- Central Research Laboratories, Seikagaku Corporation, Higashiyamato-shi, Tokyo, Japan
| | - Mayumi Nagata
- Department of Ophthalmology, Dokkyo Medical University, Shimotsugagun, Tochigi, Japan
| | - Hiroyuki Matsushima
- Department of Ophthalmology, Dokkyo Medical University, Shimotsugagun, Tochigi, Japan
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23
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Matsumoto S, Nakanishi R, Watanabe I, Aikawa H, Noike R, Yabe T, Okubo R, Fujino T, Amano H, Toda M, Ikeda T. Heart Rate After Resuscitation From Out-of-Hospital Cardiac Arrest due to Acute Coronary Syndrome Is an Independent Predictor of Clinical Outcome. Circ J 2020; 84:569-576. [PMID: 32074542 DOI: 10.1253/circj.cj-19-0836] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Heart rate (HR) is a useful predictor of cardiovascular disease, especially in acute coronary syndrome (ACS). However, it is unclear whether there is an association between HR and clinical outcomes after resuscitation from out-of-hospital cardiac arrest (OHCA) due to ACS. The aim of this study was to investigate the impact of HR on clinical outcome in individuals resuscitated from OHCA due to ACS.Methods and Results:Data from 3,687 OHCA patients between October 2002 and October 2014 were retrospectively analyzed. We divided 154 patients diagnosed with ACS into 2 groups: those with tachycardia (HR >100 beats/min, n=71) and those without tachycardia (HR ≤100 beats/min, n=83) after resuscitation. The primary endpoint was 1-year mortality and the secondary endpoint was neurological injury at discharge according to cerebral performance category score. Overall, mean HR was 95.6 beats/min. There were several significant differences in patient characteristics, indicating poor general condition of patients with tachycardia. Mortality at 1-year was 41.6%, and neurological injury at discharge was observed in 44.1% of individuals. In the multivariate analysis, tachycardia after resuscitation was an independent predictor of both 1-year mortality (hazard ratio, 2.66; 95% CI: 1.20-5.85; P=0.03) and neurological injury at discharge (odds ratio, 2.65; 95% CI: 1.27-5.55; P=0.04). CONCLUSIONS In patients who recovered from OHCA due to ACS, tachycardia after resuscitation predicted poor clinical outcome.
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Affiliation(s)
- Shingo Matsumoto
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine
| | - Rine Nakanishi
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine
| | - Ippei Watanabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Hiroto Aikawa
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Ryota Noike
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Takayuki Yabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Ryo Okubo
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Tadashi Fujino
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine
| | - Hideo Amano
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine
| | - Mikihito Toda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Graduate School of Medicine
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Trang CX, Shimamura N, Nakayama K, Souma S, Sugawara K, Watanabe I, Yamauchi K, Oguchi T, Segawa K, Takahashi T, Ando Y, Sato T. Conversion of a conventional superconductor into a topological superconductor by topological proximity effect. Nat Commun 2020; 11:159. [PMID: 31919356 PMCID: PMC6952357 DOI: 10.1038/s41467-019-13946-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 12/10/2019] [Indexed: 12/03/2022] Open
Abstract
Realization of topological superconductors (TSCs) hosting Majorana fermions is a central challenge in condensed-matter physics. One approach is to use the superconducting proximity effect (SPE) in heterostructures, where a topological insulator contacted with a superconductor hosts an effective p-wave pairing by the penetration of Cooper pairs across the interface. However, this approach suffers a difficulty in accessing the topological interface buried deep beneath the surface. Here, we propose an alternative approach to realize topological superconductivity without SPE. In a Pb(111) thin film grown on TlBiSe2, we discover that the Dirac-cone state of substrate TlBiSe2 migrates to the top surface of Pb film and obtains an energy gap below the superconducting transition temperature of Pb. This suggests that a Bardeen-Cooper-Schrieffer superconductor is converted into a TSC by the topological proximity effect. Our discovery opens a route to manipulate topological superconducting properties of materials. Realizing topological superconductivity is essential for applicable fault-tolerant quantum computation. Here, Trang et al. report migration of Dirac-cone from TlBiSe2 substrate to top surface of superconducting Pb film due to topological proximity effect, suggesting realization of topological superconductivity.
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Affiliation(s)
- C X Trang
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan
| | - N Shimamura
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan
| | - K Nakayama
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan.,Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST), Tokyo, 102-0076, Japan
| | - S Souma
- Center for Spintronics Research Network, Tohoku University, Sendai, 980-8577, Japan.,WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - K Sugawara
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan.,Center for Spintronics Research Network, Tohoku University, Sendai, 980-8577, Japan.,WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - I Watanabe
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan
| | - K Yamauchi
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
| | - T Oguchi
- Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka, 567-0047, Japan
| | - K Segawa
- Department of Physics, Kyoto Sangyo University, Kyoto, 603-8555, Japan
| | - T Takahashi
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan.,Center for Spintronics Research Network, Tohoku University, Sendai, 980-8577, Japan.,WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
| | - Yoichi Ando
- Institute of Physics II, University of Cologne, Köln, 50937, Germany
| | - T Sato
- Department of Physics, Tohoku University, Sendai, 980-8578, Japan. .,Center for Spintronics Research Network, Tohoku University, Sendai, 980-8577, Japan. .,WPI Research Center, Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan.
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25
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Watanabe I, Shintani Y, Terada S, Fujii T, Kiuchi S, Nakanishi R, Katayanagi T, Kawasaki M, Tokuhiro K, Ohsawa H, Ikeda T. A Clinical Association between an Increasing Renal Resistive Index and the Atherosclerotic Burden in Patients with a Preserved Renal Function. Intern Med 2020; 59:909-916. [PMID: 32238661 PMCID: PMC7184073 DOI: 10.2169/internalmedicine.3232-19] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Objective A positive correlation is observed between the progression of renal impairment and the increasing risk of cardiovascular disease. Our aim was to examine the relationship between the renal resistive index (RRI) assessed by duplex sonography and the extent of atherosclerosis in patients without renal impairment undergoing vascular imaging studies. Methods The RRI was evaluated pre-procedurally among 106 outpatients with an estimated glomerular filtration rate (eGFR) ≥60 mL/min/1.73 m2 undergoing clinically-driven coronary computed tomography angiography (CCTA). In those subjects, a carotid artery ultrasound scan was also performed to evaluate carotid artery disease. We investigated the association between the RRI and the atherosclerotic extent, defined by the presence of coronary artery calcium (CAC) >0 and carotid intima-media thickness (cIMT) ≥1.0 mm. Results Multi-site atherosclerosis (CAC>0 and cIMT≥1.0 mm) was found in 31 patients. The RRI was significantly increased with an increasing number of atherosclerotic vessels (absence of atherosclerosis: 0.65±0.04 vs. single-site atherosclerosis: 0.67±0.06 vs. multi-site atherosclerosis: 0.71±0.05, p<0.001). A multivariate logistic regression analysis showed that RRI>0.70 [odds ratio (OR): 4.05, 95% confidence interval (CI), 1.37-12.0, p=0.01], cardio ankle vascular index (CAVI) ≥9.0 (OR: 8.18, 95% CI: 2.47-27.1, p<0.01), diabetes (OR: 4.34, 95% CI: 1.37-13.7, p=0.01) and an eGFR>90 mL/min/1.73 m2 (OR: 5.89, 95% CI: 1.39-25.1, p=0.01) were associated with multi-site atherosclerosis. Conclusion The RRI, a sub-clinical renal parameter is an atherosclerotic marker in patients without renal impairment.
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Affiliation(s)
- Ippei Watanabe
- Department of Cardiovascular Medicine, Toho University School of Medicine, Japan
| | - Yodo Shintani
- Cardiovascular Centre of Misato Central General Hospital, Japan
| | | | - Takahiro Fujii
- Department of Cardiovascular Medicine, Toho University School of Medicine, Japan
| | - Shunsuke Kiuchi
- Department of Cardiovascular Medicine, Toho University School of Medicine, Japan
| | - Rine Nakanishi
- Department of Cardiovascular Medicine, Toho University School of Medicine, Japan
| | | | | | | | - Hidefumi Ohsawa
- Cardiovascular Centre of Misato Central General Hospital, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University School of Medicine, Japan
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Koike H, Watanabe I, Akitsu KATSUYA, Shinohara MASAYA, Kinoshita TOSHIO, Yuzawa HITOMI, Suzuki TAKEYA, Fujino TADASHI, Morita TOSHISUK, Ikeda TAKANORI. P11 The difference in the serial change of indoxyl sulfate after catheter ablation among atrial fibrillation patients with or without chronic kidney disease. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehz872.017] [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
Introduction
It is well known that catheter ablation (CA) for patients with atrial fibrillation (AF) improves their renal function. However, the precise mechanism of improving a renal function, such as a transition of the uremic toxin is unclear.
Purpose
Indoxyl sulfate (IS), a protein-bound uremic toxin, induces chronic kidney disease (CKD) and AF. This study aimed to investigate the transition of serum IS level in the AF patients with and without CKD after CA.
Methods
A total of 138 consecutive AF patients who underwent CA and maintained sinus rhythm were prospectively enrolled (age 65.5 ± 10.7 years, paroxysmal AF 67.4%). Patients were divided into 4 groups (non-CKD/low-IS:68, non-CKD/high-IS:28, CKD/low-IS:13, CKD/high-IS:29). CKD was defined as CKD stage III (estimated glomerular filtration rate (eGFR) 30-60 ml/min/1.73m2), and high-IS was defined according to the mean of IS (IS≥1.1 μg/ml) before CA. Plasma IS levels and eGFR were determined before and at 1 year after CA. We evaluated the relationship between the IS and eGFR after CA among the 4 groups.
Results
CA significantly improved the eGFR in patients with CKD (from 50.2 ± 5.7 to 55.4 ± 10.8 ml/min/1.73m2, p < 0.001). The serum IS level in the patients with non-CKD/high-IS was significantly decreased (from 1.7 ± 0.7 to 1.1 ± 0.6 μg/ml, p < 0.001). However, the serum IS level in the patients with CKD/high-IS was not improved (from 1.9 ± 0.9 to 1.7 ± 0.7 μg/ml, p = 0.22) and significantly higher than that in the others (p < 0.001), regardless of improving their eGFR (Figure). Furthermore, the multiple regression analysis revealed that the ΔIS, between before and after CA, was independent of eGFR.
Conclusion
The change of IS in the patients with CKD was significantly different from that in those without CKD. In the patients with CKD, CA improved their eGFR, however, the serum level of IS, a protein-bound uremic toxin, was not improved after CA.
Abstract P11 Figure. Serial Change of eGFR and IS
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Affiliation(s)
- H Koike
- Mitsui Memorial Hospital, Tokyo, Japan
| | - I Watanabe
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - KATSUYA Akitsu
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - MASAYA Shinohara
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - TOSHIO Kinoshita
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - HITOMI Yuzawa
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - TAKEYA Suzuki
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - TADASHI Fujino
- Toho University, Department of Cardiovascular Medicine, Tokyo, Japan
| | - TOSHISUK Morita
- Toho University, Department of Laboratory Medicine, Tokyo, Japan
| | - TAKANORI Ikeda
- Toho University, Department of Laboratory Medicine, Tokyo, Japan
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Amano H, Noike R, Yabe T, Watanabe I, Okubo R, Koizumi M, Toda M, Ikeda T. Frailty and coronary plaque characteristics on optical coherence tomography. Heart Vessels 2019; 35:750-761. [DOI: 10.1007/s00380-019-01547-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/13/2019] [Indexed: 12/20/2022]
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28
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Taufiq A, Sunaryono S, Hidayat N, Putra E, Okazawa A, Watanabe I, Kojima N, Pratapa S, Darminto D. Nanostructure and Magnetic Field Ordering in Aqueous Fe3O4 Ferrofluids: A Small-Angle Neutron Scattering Study. Atom Indo 2019. [DOI: 10.17146/aij.2019.744] [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: 11/09/2022] Open
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Watanabe I, Nagata M, Matsushima H. Addition Of D-Sorbitol Improves The Usability Of Ophthalmic Viscosurgical Devices. Clin Ophthalmol 2019; 13:1877-1885. [PMID: 31576103 PMCID: PMC6769236 DOI: 10.2147/opth.s218675] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 06/07/2019] [Accepted: 09/04/2019] [Indexed: 11/23/2022] Open
Abstract
Purpose To evaluate the effects of D-sorbitol addition on changes in the extrusion force of ophthalmic viscosurgical devices (OVDs). Methods OVD formulations; the mixtures of 3% hyaluronic acid (HA) and 4% chondroitin sulfate (CS) containing 0%, 0.5%, or 1.0% D-sorbitol were prepared. Each prefilled syringe of OVD was stored at room temperature for 0, 15, 30, 60, or 120 mins after a small amount of viscoelastic agent was discharged from the needle. The extrusion force values (kgf) of these OVDs when reused after storage were measured with a texture analyzer. Moreover, 10 healthy adults (5 men and 5 women) used a pinch sensor to measure the extrusion force values for the HA/CS combination without D-sorbitol which was stored in the above manner, and used a 4-step scale to score the usability of OVD. Results For the HA/CS combination without D-sorbitol, the extrusion force value was increased from its initial value (storage duration, 0 min) as storage duration increased. However, for the HA/CS combination containing 0.5% or 1.0% D-sorbitol, this value remained almost unchanged over time. Likewise, the pinch sensor-determined extrusion force values of HA/CS combination without D-sorbitol increased, depending on storage duration. Conclusion The addition of D-sorbitol to viscoelastic agent may suppress the needle clogging that occurs with OVD storage, and may improve the usability of OVDs during surgery.
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Affiliation(s)
- Ippei Watanabe
- Medical Science Liaison Unit, Seikagaku Corporation, Tokyo, Japan
| | - Mayumi Nagata
- Department of Ophthalmology, Dokkyo Medical University, Tochigi, Japan
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30
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Amano H, Noike R, Saito D, Yabe T, Watanabe I, Koizumi M, Okubo R, Toda M, Ikeda T. P5623Plaque characteristics, slow flow during percutaneous coronary intervention, and clinical outcomes of irregular protrusion by optical coherence tomography. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0567] [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
Introduction
In pathological studies, penetration of the lipid core into the stent strut is associated with neointimal growth and stent thrombosis. Irregular protrusion on optical coherence tomography (OCT) is associated with clinical events and target lesion revascularization. However, there are few reports about the relationship among irregular protrusion, plaque characteristics, and slow flow during percutaneous coronary intervention. We investigated clinical and procedure characteristics, plaque characteristics, slow flow after stent implantation, and clinical outcomes with irregular protrusion by using OCT.
Methods
Eighty-four lesions in 76 patients undergoing OCT before percutaneous coronary intervention were evaluated. Irregular protrusion was defined as protrusion of material with an irregular surface into the lumen between stent struts with a maximum height of ≥100 μm. Major adverse clinical outcomes were defined as death, acute myocardial infarction, acute coronary syndrome, or target lesion revascularization.
Results
Lesions with irregular protrusion were found in 56% (47/84). Compared with lesions without irregular protrusion, those with irregular protrusion had significantly higher low-density lipoprotein cholesterol (LDL-C) levels (108±31 mg/dL vs. 95±25 mg/dL, P=0.044); a tendency toward decreased use of statins (44% [19/43] vs. 67% [22/33], P=0.065); significantly larger reference vessel diameter (3.12±0.53 mm vs. 2.74±0.63 mm, P=0.004); significantly larger stent diameter (3.23±0.43 mm vs. 3.00±0.49 mm, P=0.025); a tendency toward longer total stent length (29.3±14.2 mm vs. 23.7±11.4 mm, P=0.056); significantly larger maximum balloon diameter (3.56±0.55 mm vs. 3.22±0.63 mm, P=0.010); significantly higher incidence of slow flow after stent implantation (38% [18/47] vs. 11% [4/37], P=0.006); significantly higher ΔTIMI flow from pre-stenting to post-stenting (0.4±0.6 vs. 0.1±0.3, P=0.009); significantly higher incidence of lipid-rich plaque (70% [33/47] vs. 35% [13/37], P=0.002); thin-cap fibroatheromas (TCFAs: 49% [23/47] vs. 5% [2/37], P<0.001); plaque rupture (40% [19/47] vs. 16% [6/37], P=0.018); macrophage accumulation (51% [24/47] vs. 24% [9/37], P=0.015); internal running vasa vasorum (51% [24/47] vs. 11% [4/37], P<0.001); thrombus (32% [15/47] vs. 3% [1/37], P<0.001); and a tendency higher incidence of one-year adverse clinical outcomes (12% [5/43] vs. 0% [0/33], P=0.075: log rank). The multivariable analysis showed that TCFA was an independent predictor of irregular protrusion (odds ratio 9.00, 95% CI 1.32–61.36, P=0.025).
Conclusions
Irregular protrusion on OCT was associated with high plaque vulnerability, higher LDL-C, less frequent use of statin, larger vessel diameter, longer total stent length, slow flow after stent implantation, and one-year adverse clinical outcomes.
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Affiliation(s)
- H Amano
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - R Noike
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - D Saito
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Yabe
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - I Watanabe
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - M Koizumi
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - R Okubo
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - M Toda
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
| | - T Ikeda
- Toho University Faculty of Medicine, Department of Cardiovascular Medicine, Tokyo, Japan
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31
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Watanabe I, Mirumachi H, Konno H, Suzuki K. [Evaluation of Rheological Properties of Cohesive Ophthalmic Viscosurgical Devices Composed of Sodium Hyaluronate with High Molecular Weight-2019]. YAKUGAKU ZASSHI 2019; 139:1121-1128. [PMID: 31366849 DOI: 10.1248/yakushi.19-00084] [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] [Indexed: 11/22/2022]
Abstract
Ophthalmic viscosurgical devices (OVDs), mainly containing sodium hyaluronate (HA), are used in cataract surgeries to protect the cornea endothelium. In this study, the rheological properties of 9 launched products (containing 1% HA) were evaluated. The molecular weights (MWs) of HA estimated based on intrinsic viscosity varied widely, between 1100-2500 kDa, and showed a particular value for each product. Of the 9 products, 6 are classified as cohesive OVDs and their product specifications show the same value for intrinsic viscosity (25-45 dL/g), with high MW HA (>2000 kDa); however, the MW of each HA showed a particular value (2200-2500 kDa) within the range of the product specification. As with the MW of HA, apparent viscosity and dynamic rheological parameters showed particular values for each OVD. The product Opegan-Hi exhibited the highest value of apparent viscosity at low shear rate, and a solid-like behavior among the OVDs. In a questionnaire survey among 198 cataract surgeons, 42% of surgeons had experienced a difference in ability to maintain the depth of anterior chamber during surgery among the different cohesive OVDs used. This suggested that surgeons select OVD properties based on surgical procedure and patient cases. In conclusion, we demonstrated that each OVD has particular rheological properties within the range of the product specification defined by the intrinsic viscosity. The results might provide useful information for surgeons in their selection of OVDs based on their experience.
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Watanabe I, Saito D, Noike R, Yabe T, Okubo R, Nakanishi R, Amano H, Toda M, Ikeda T. Measurement of left ventricular end-diastolic pressure improves the prognostic utility of the Global Registry of Acute Coronary Events score in patients with ST-segment elevation myocardial infarction. AsiaIntervention 2019; 5:134-140. [PMID: 36483524 PMCID: PMC9706761 DOI: 10.4244/aij-d-18-00051] [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: 09/30/2018] [Accepted: 05/02/2019] [Indexed: 06/17/2023]
Abstract
AIMS This study aimed to evaluate the clinical significance of measuring left ventricular end-diastolic pressure (LVEDP) in patients with ST-segment elevation myocardial infarction (STEMI). METHODS AND RESULTS We retrospectively analysed clinical data from 277 patients with STEMI between October 2006 and June 2014. LVEDP and left ventricular ejection fraction (LVEF) were perioperatively measured during percutaneous coronary intervention (PCI). The primary endpoint was a major adverse cardiac event (MACE) such as cardiac death, non-fatal myocardial infarction, or hospitalisation due to heart failure during the observation period. The independent predictors were identified by Cox proportional hazards regression analysis. Continuous net reclassification improvement (cNRI) and integrated discrimination improvement (IDI) were conducted to assess the incremental prognostic value of adding cardiovascular parameters, including LVEDP, to the Global Registry of Acute Coronary Events (GRACE) score. The mean follow-up period was 44±31 months. A MACE occurred in 33 patients (12.0%). In the Cox proportional hazards regression model, after adjusting for confounding factors, LVEDP was an independent predictor of a MACE (hazard ratio [HR] 1.11, 95% confidence interval [CI]: 1.06-1.17, p<0.001). In addition, the predictive value of the GRACE score for a MACE was significantly improved by LVEDP (NRI 0.66, 95% CI: 0.32-1.01, p<0.001; IDI 0.06, 95% CI: 0.02-0.11, p=0.001), but not by LVEF (NRI 0.14, 95% CI: -0.22-0.50, p=0.44; IDI 0.01, 95% CI: 0.00-0.03, p=0.11). CONCLUSIONS The results of this study demonstrated that evaluating LVEDP provides an additive prognostic value over conventional risks estimated by the GRACE score among STEMI patients.
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Affiliation(s)
- Ippei Watanabe
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Daiga Saito
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Ryota Noike
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takayuki Yabe
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Ryo Okubo
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Rine Nakanishi
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Hideo Amano
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Mikihito Toda
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine, Tokyo, Japan
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Watanabe I, Hoshi H, Sato M, Suzuki K. Rheological and Adhesive Properties to Identify Cohesive and Dispersive Ophthalmic Viscosurgical Devices. Chem Pharm Bull (Tokyo) 2019; 67:277-283. [PMID: 30828005 DOI: 10.1248/cpb.c18-00890] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The purpose of this study is to evaluate the usefulness of the rheological properties and adhesive force of ophthalmic viscosurgical devices (OVDs) as parameters for understanding and identifying the surgical behavior of cohesive and dispersive OVDs. The apparent viscosity, and the storage and loss moduli (dynamic rheological parameters) of 50% chondroitin sulfate (CS), 3% sodium hyaluronate (HA), Shellgan (the combination of 3% HA and 4% CS), Opegan (1% HA with a low molecular mass) and Opegan-Hi (1% HA with a high molecular mass) were obtained with a rheometer. The adhesive force of each sample was measured by using a texture analyzer. Opegan-Hi showed a solid-like behavior, while 50% CS showed a fluid-like behavior from their apparent viscosity and dynamic rheological parameters. Shellgan, 3% HA, and Opegan exhibited similar rheological properties and intermediate characteristics between Opegan-Hi and 50% CS, although their respective values were slightly different. Among these OVD samples, the adhesive force was higher in the order of 50% CS > Shellgan, 3% HA > Opegan > Opegan-Hi. The adhesive force of dispersive OVDs tended to be higher than that of cohesive OVDs, which correlated well with the removal times of OVDs from the eye that have previously been reported. In conclusion, we demonstrated that cohesive OVDs and dispersive OVDs have particular rheological and adhesive properties that can be applied to identify both types. These parameters obtained in this study provide useful information for a greater understanding and prediction of the behavior of OVDs in the eye during surgery.
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Affiliation(s)
| | | | - Miwako Sato
- Medical Science Liaison Unit, Seikagaku Corporation
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Watanabe I, Tatebe J, Fujii T, Noike R, Saito D, Koike H, Yabe T, Okubo R, Nakanishi R, Amano H, Toda M, Ikeda T, Morita T. Prognostic Significance of Serum Indoxyl Sulfate and Albumin for Patients with Cardiovascular Disease. Int Heart J 2018; 60:129-135. [PMID: 30464134 DOI: 10.1536/ihj.18-116] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The progression of renal dysfunction reduces serum albumin and deteriorates the binding capacity of protein-bound uremic toxins. We evaluated the prognostic implications of serum indoxyl sulfate (IS) and albumin levels in patients with cardiovascular disease.We prospectively enrolled 351 consecutive patients undergoing percutaneous revascularization for coronary artery disease or peripheral artery disease. The primary endpoint was all-cause mortality. Patients were assigned to four groups according to the median levels of serum IS (0.1 mg/dL) and albumin (3.9 g/dL).During the median follow-up time of 575 days, 16 patients died. The IS level was significantly higher in nonsurvivors (0.33 versus 0.85 mg/dL, P < 0.05). On the Kaplan-Meier curve, the high IS/low albumin group presented the highest mortality rate (log-rank test, P < 0.01). Cox proportional hazard analysis revealed that high IS/low albumin (hazard ratio (HR): 5.33; 95% confidence interval (CI): 1.71-16.5; P < 0.01), diastolic pressure (HR: 0.94; 95% CI: 0.91-0.98; P < 0.01), prior stroke (HR: 4.54; 95% CI: 1.33-15.4; P = 0.01), and left ventricular ejection fraction (LVEF) (HR: 0.92; 95% CI: 0.88-0.96; P < 0.001) were associated with increased mortality. Furthermore, the combination of IS and albumin levels significantly conferred an additive value to LVEF for predicting mortality (C-statistic: 0.69 versus 0.80; P < 0.001; net reclassification improvement: 0.83; P < 0.001; integrated discrimination improvement: 0.02; P = 0.02).A lower albumin level adds potentiating effects on IS as a prognostic factor for cardiovascular disease.
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Affiliation(s)
- Ippei Watanabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Junko Tatebe
- Department of Laboratory Medicine, Toho University Faculty of Medicine
| | - Takahiro Fujii
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Ryota Noike
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Daiga Saito
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Hideki Koike
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Takayuki Yabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Ryo Okubo
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Rine Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Hideo Amano
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Mikihito Toda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Takanori Ikeda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Toshisuke Morita
- Department of Laboratory Medicine, Toho University Faculty of Medicine
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Koike H, Morita T, Tatebe J, Watanabe I, Koike M, Yao S, Shinohara M, Yuzawa H, Suzuki T, Fujino T, Ikeda T. The relationship between serum indoxyl sulfate and the renal function after catheter ablation of atrial fibrillation in patients with mild renal dysfunction. Heart Vessels 2018; 34:641-649. [PMID: 30406286 DOI: 10.1007/s00380-018-1288-0] [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] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 10/26/2018] [Indexed: 01/21/2023]
Abstract
Indoxyl sulfate (IS), a protein-bound uremic toxin, induces renal disorders and atrial fibrillation (AF). It is well known that renal dysfunction is a risk factor for AF and radiofrequency catheter ablation (RFCA) improves the renal function. However, the improvement in the renal function after RFCA in patients with early stage chronic kidney disease (CKD) and the serial changes in the IS level have not been fully elucidated. This study aimed to investigate whether IS affects the improvement in the renal function. A total of 91 consecutive patients with mild kidney dysfunction (CKD stage I-II) who underwent RFCA and maintained sinus rhythm were prospectively enrolled. The plasma IS level and estimated glomerular filtration rate (eGFR) were determined before, 3 months, and 1 year after RFCA. The patients were divided according to the IS quartiles (Q1-4; < 0.4, 0.4-0.7, 0.7-1.2, and > 1.2 μg/ml). There was no significant difference in the eGFR among the IS quartiles. A significantly higher eGFR improvement rate was obtained for IS-Q4 than the other quartiles (p = 0.039). The IS-Q4 IS level significantly decreased at 1 year after RFCA (1.8 ± 0.8 to 1.2 ± 0.7 μg/ml, p < 0.01). The multivariable logistic model revealed that a high-IS level (IS-Q4) was an independent predictor of an eGFR improvement (OR 3.33; 95% CI 1.16-9.59; p = 0.026). A high-IS level reduction after RFCA improved the renal function in AF patients with mild kidney dysfunction.
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Affiliation(s)
- Hideki Koike
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Toshisuke Morita
- Department of Laboratory Medicine, Toho University Faculty of Medicine, 6-11-1 Omorinishi, Ota-ku, Tokyo, 143-8541, Japan.
| | - Junko Tatebe
- Department of Laboratory Medicine, Toho University Faculty of Medicine, 6-11-1 Omorinishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Ippei Watanabe
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Makiko Koike
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Shintaro Yao
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Masaya Shinohara
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Hitomi Yuzawa
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takeya Suzuki
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Tadashi Fujino
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
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Kumar D, Kuo CN, Astuti F, Shang T, Lee MK, Lue CS, Watanabe I, Barker JAT, Shiroka T, Chang LJ. Nodeless superconductivity in the cage-type superconductor Sc 5Ru 6Sn 18 with preserved time-reversal symmetry. J Phys Condens Matter 2018; 30:315803. [PMID: 29947614 DOI: 10.1088/1361-648x/aacf65] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We report the single-crystal synthesis and detailed investigations of the cage-type superconductor Sc5Ru6Sn18, using powder x-ray diffraction (XRD), magnetization, specific-heat and muon-spin relaxation (µSR) measurements. Sc5Ru6Sn18 crystallizes in a tetragonal structure (space group I41/acd) with lattice parameters a = 1.387(3) nm and c = 2.641(5) nm. Both DC and AC magnetization measurements prove the type-II superconductivity in Sc5Ru6Sn18 with T c ≈ 3.5(1) K, a lower critical field [Formula: see text] = 157(9) Oe and an upper critical field, [Formula: see text] = 26(1) kOe. The zero-field electronic specific-heat data are well fitted using a single-gap BCS model, with [Formula: see text] = 0.64(1) meV. The Sommerfeld constant γ varies linearly with the applied magnetic field, indicating s-wave superconductivity in Sc5Ru6Sn18. Specific-heat and transverse-field (TF) µSR measurements reveal that Sc5Ru6Sn18 is a superconductor with strong electron-phonon coupling, with TF-µSR also suggesting a single-gap s-wave character of the superconductivity. Furthermore, zero-field µSR measurements do not detect spontaneous magnetic fields below T c, hence implying that time-reversal symmetry is preserved in Sc5Ru6Sn18.
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Affiliation(s)
- D Kumar
- Department of Physics, National Cheng Kung University, Tainan 70101, Taiwan
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Tobita K, Watanabe I, Tomokiyo M, Saito M. Effects of heat-treated Lactobacillus crispatus KT-11 strain consumption on improvement of oral cavity environment: a randomised double-blind clinical trial. Benef Microbes 2018; 9:585-592. [DOI: 10.3920/bm2017.0137] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Heat-treated lactic acid bacteria is added to some foods because it is easier to store and transport, and have less interference with other food ingredient compared with living lactic acid bacteria. We have reported that oral administration of heat-treated Lactobacillus crispatus KT-11 strain (KT-11) suppressed the symptoms of periodontal disease in mice orally infected with Porphyromonas gingivalis. However, the preventive effect of KT-11 on periodontal disease in human is unclear. The aim of this randomised double-blind clinical trial was to examine the effects of KT-11 consumption on the oral environment in healthy volunteers. Sixteen healthy volunteers were randomly assigned to two groups (KT-11 or placebo), and they consumed a KT-11 food tablet (1.2×1010 KT-11 cells) or a placebo food tablet (without KT-11) every day for 4 weeks. Clinical parameters including numbers of major periodontopathic bacteria in saliva, plaque score, gum conditions, and oral mucosal fluid level were evaluated at weeks 0 and 4. Amount of change in P. gingivalis numbers decreased in the KT-11 group compared to that in the placebo group at week 4. Female participants in the KT-11 group had decreased plaque scores, reddish tinge, and gingival swelling scores compared to those in the placebo group at week 4. Furthermore, male participants in the KT-11 group demonstrated increased oral mucosa fluid scores. These clinical findings suggest that daily KT-11 intake can prevent periodontal disease through the improvement of oral conditions.
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Affiliation(s)
- K. Tobita
- KITII Co., Ltd., 5 Araki-cho, Shinjuku-ku, Tokyo 160-0007, Japan
| | - I. Watanabe
- KITII Co., Ltd., 5 Araki-cho, Shinjuku-ku, Tokyo 160-0007, Japan
| | - M. Tomokiyo
- KITII Co., Ltd., 5 Araki-cho, Shinjuku-ku, Tokyo 160-0007, Japan
| | - M. Saito
- Nihon University School of Dentistry at Matsudo, 2-870-1 Sakaecho-Nishi, Matsudo-shi, Chiba 271-8587, Japan
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Watanabe I, Tatebe J, Fujii T, Noike R, Saito D, Koike H, Yabe T, Okubo R, Nakanishi R, Amano H, Toda M, Ikeda T, Morita T. Prognostic Utility of Indoxyl Sulfate for Patients with Acute Coronary Syndrome. J Atheroscler Thromb 2018; 26:64-71. [PMID: 29780075 PMCID: PMC6308268 DOI: 10.5551/jat.44149] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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] [Indexed: 12/22/2022] Open
Abstract
Aim: We investigated whether indoxyl sulfate (IS), a protein-bound uremic toxin, predicts prognosis after acute coronary syndrome (ACS). Methods: Serum IS level was determined prospectively in 98 patients who underwent successful primary percutaneous coronary intervention for ACS. Patients on hemodialysis were excluded. The endpoint of this study was six-month composite events including death, nonfatal myocardial infarction, heart failure requiring hospitalization, and adverse bleeding events. Results: During the mean follow-up period of 168 days, composite events occurred in 13.3% of cases. Serum IS level was significantly higher in subjects who developed composite events than in those without events (0.14 ± 0.11 mg/dl vs. 0.06 ± 0.04 mg/dl; p < 0.001). After adjusting for confounding factors, a Cox proportional hazard analysis revealed that the IS level (hazard ratio (HR): 10.6; 95% confidence interval (CI): 1.63–69.3, p = 0.01), hemoglobin level (HR: 0.61; 95% CI: 0.43–0.87; p < 0.01), and left ventricular ejection fraction (LVEF) (HR: 0.95; 95% CI: 0.91–0.99; p = 0.03) were independent predictive factors of composite events. Furthermore, IS level significantly conferred additional value to the combined established risks of LVEF and hemoglobin level for predicting the incidence of composite events (area under the curve: 0.82 vs. 0.88, p = 0.01; net reclassification improvement: 0.67, p = 0.01; and integrated discrimination improvement: 0.15, p < 0.01). Conclusions: The assessment of serum IS level has prognostic utility for the management of ACS.
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Affiliation(s)
- Ippei Watanabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Junko Tatebe
- Department of Laboratory Medicine, Toho University Faculty of Medicine
| | - Takahiro Fujii
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Ryota Noike
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Daiga Saito
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Hideki Koike
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Takayuki Yabe
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Ryo Okubo
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Rine Nakanishi
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Hideo Amano
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Mikihito Toda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Takanori Ikeda
- Division of Cardiovascular Medicine, Department of Internal Medicine, Toho University Faculty of Medicine
| | - Toshisuke Morita
- Department of Laboratory Medicine, Toho University Faculty of Medicine
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Saito D, Ikeda T, Toda M, Amano H, Nakanishi R, Okubo R, Watanabe I. MEASUREMENT OF LEFT END DIASTOLIC PRESSURE IMPROVES PROGNOSTIC UTILITY OF GLOBAL REGISTRY OF ACUTE CORONARY EVENTS SCORE IN PATIENTS WITH ST SEGMENT ELEVATION MYOCARDIAL INFARCTION. J Am Coll Cardiol 2018. [DOI: 10.1016/s0735-1097(18)31846-1] [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: 10/17/2022]
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40
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Takahiro F, Watanabe I, Hisatake S, Kiuchi S, Kabuki T, Oka T, Dobashi S, Toyoda Y, Honda M, Ikeda T. A Case of Peripartum Cardiomyopathy Treated by Anti-Prolactin Therapy. J Card Fail 2017. [DOI: 10.1016/j.cardfail.2017.08.423] [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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41
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Fujii T, Watanabe I, Saito D, Tatebe J, Morita T, Ikeda T. TCT-669 A Prognostic Utility of Indoxyl Sulfate in Patients with Acute Coronary Syndrome. J Am Coll Cardiol 2017. [DOI: 10.1016/j.jacc.2017.09.917] [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: 10/18/2022]
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42
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Amano H, Saito D, Yabe T, Watanabe I, Koizumi M, Okubo R, Toda M, Ikeda T. P2332Association between internal running vasa vasorum in optical coherence tomography and slow flow during percutaneous coronary intervention. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx502.p2332] [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: 11/14/2022] Open
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43
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Watanabe I, Watanabe R, Okumura Y, Nagashima K, Iso K, Takahashi K, Arai M, Kurokawa S, Ohkubo K, Nakai T, Hirayama A. P865Association between serum adiponectin, female sex, NT-proBNP, and post-ablation recurrence of atrial fibrillation. Europace 2017. [DOI: 10.1093/ehjci/eux151.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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44
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Amano H, Koizumi M, Okubo R, Yabe T, Watanabe I, Saito D, Toda M, Ikeda T. Comparison of Coronary Intimal Plaques by Optical Coherence Tomography in Arteries With Versus Without Internal Running Vasa Vasorum. Am J Cardiol 2017; 119:1512-1517. [PMID: 28347486 DOI: 10.1016/j.amjcard.2017.02.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Revised: 02/08/2017] [Accepted: 02/08/2017] [Indexed: 01/02/2023]
Abstract
It has been reported that the internal running vasa vasorum (VV) was associated with plaque vulnerability, and microchannels in optical coherence tomography (OCT) are consistent pathologically with VV. We investigated plaque vulnerability and incidence of slow flow during percutaneous coronary intervention of the internal longitudinal running VV. Subjects were 71 lesions that underwent OCT before percutaneous coronary intervention. Internal running VV was defined as intraplaque neovessels running from the adventitia to plaque. Lesions with internal running VV were found in 47% (33 of 71). Compared with lesions without internal running VV, lesions with internal running VV showed significantly higher incidence of intimal laceration (64% [21 of 33] vs 16% [6 of 38], p <0.001), lipid-rich plaque (79% [26 of 33] vs 26% [10 of 38], p <0.001), plaque rupture (52% [17 of 33] vs 13% [5 of 38], p <0.001), thin-cap fibroatheroma (58% [19 of 33] vs 11% [4 of 38], p <0.001), macrophage accumulation (61% [20 of 33] vs 26% [10 of 38], p = 0.004), intraluminal thrombus (36% [12 of 33] vs 3% [1 of 38], p <0.001), and slow flow after stent implantation (42% [14 of 33] vs 13% [5 of 38], p = 0.007). The multivariable analysis showed that internal running VV was an independent predictor of slow flow after stent implantation (odds ratio 4.23, 95% confidence interval 1.05 to 17.01, p = 0.042). In conclusion, compared with those without, plaques with internal running VV in OCT had high plaque vulnerability with more intimal laceration, lipid-rich plaque, plaque rupture, thin-cap fibroatheroma, macrophage accumulation, and intraluminal thrombus, and they had high incidence of slow flow after stent implantation.
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Wang K, Murahari P, Yokoyama K, Lord JS, Pratt FL, He J, Schulz L, Willis M, Anthony JE, Morley NA, Nuccio L, Misquitta A, Dunstan DJ, Shimomura K, Watanabe I, Zhang S, Heathcote P, Drew AJ. Temporal mapping of photochemical reactions and molecular excited states with carbon specificity. Nat Mater 2017; 16:467-473. [PMID: 27941808 DOI: 10.1038/nmat4816] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 10/31/2016] [Indexed: 06/06/2023]
Abstract
Photochemical reactions are essential to a large number of important industrial and biological processes. A method for monitoring photochemical reaction kinetics and the dynamics of molecular excitations with spatial resolution within the active molecule would allow a rigorous exploration of the pathway and mechanism of photophysical and photochemical processes. Here we demonstrate that laser-excited muon pump-probe spin spectroscopy (photo-μSR) can temporally and spatially map these processes with a spatial resolution at the single-carbon level in a molecule with a pentacene backbone. The observed time-dependent light-induced changes of an avoided level crossing resonance demonstrate that the photochemical reactivity of a specific carbon atom is modified as a result of the presence of the excited state wavefunction. This demonstrates the sensitivity and potential of this technique in probing molecular excitations and photochemistry.
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Affiliation(s)
- K Wang
- College of Physical Sciences and Technology, Sichuan University, Chengdu, Sichuan 610064, China
- School of Physics and Astronomy, Queen Mary University of London, Mile End, London E1 4NS, UK
| | - P Murahari
- School of Physics and Astronomy, Queen Mary University of London, Mile End, London E1 4NS, UK
| | - K Yokoyama
- School of Physics and Astronomy, Queen Mary University of London, Mile End, London E1 4NS, UK
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
| | - J S Lord
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
| | - F L Pratt
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
| | - J He
- College of Physical Sciences and Technology, Sichuan University, Chengdu, Sichuan 610064, China
| | - L Schulz
- College of Physical Sciences and Technology, Sichuan University, Chengdu, Sichuan 610064, China
| | - M Willis
- College of Physical Sciences and Technology, Sichuan University, Chengdu, Sichuan 610064, China
| | - J E Anthony
- Department of Chemistry, University of Kentucky, Lexington, Kentucky 40506, USA
| | - N A Morley
- Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - L Nuccio
- University of Fribourg, Department of Physics and Fribourg Centre for Nanomaterials, Chemin du Museé 3, CH-1700 Fribourg, Switzerland
| | - A Misquitta
- School of Physics and Astronomy, Queen Mary University of London, Mile End, London E1 4NS, UK
| | - D J Dunstan
- School of Physics and Astronomy, Queen Mary University of London, Mile End, London E1 4NS, UK
| | - K Shimomura
- Materials and Life Science Division, J-PARC Center, Tokai, Ibaraki 319-1195, Japan
| | - I Watanabe
- RIKEN-RAL, Nishina Centre, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - S Zhang
- College of Physical Sciences and Technology, Sichuan University, Chengdu, Sichuan 610064, China
| | - P Heathcote
- School of Biological and Chemical Sciences, Queen Mary University of London, Mile End, London E1 4NS, UK
| | - A J Drew
- College of Physical Sciences and Technology, Sichuan University, Chengdu, Sichuan 610064, China
- School of Physics and Astronomy, Queen Mary University of London, Mile End, London E1 4NS, UK
- ISIS Muon Facility, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
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Okubo R, Nakanishi R, Toda M, Saito D, Watanabe I, Yabe T, Amano H, Hirai T, Ikeda T. Pericoronary adipose tissue ratio is a stronger associated factor of plaque vulnerability than epicardial adipose tissue on coronary computed tomography angiography. Heart Vessels 2017; 32:813-822. [PMID: 28229226 DOI: 10.1007/s00380-017-0943-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 01/06/2017] [Indexed: 10/20/2022]
Abstract
This study was designed to clarify the influence of pericoronary adipose tissue (PAT) on plaque vulnerability using coronary computed tomography angiography (CCTA). A total of 103 consecutive patients who underwent CCTA and subsequent percutaneous coronary intervention (PCI) using intravascular ultrasound (IVUS) for coronary artery disease were enrolled. The PAT ratio was calculated as the sum of the perpendicular thickness of the visceral layer between the coronary artery and the pericardium, or the coronary artery and the surface of the heart at the PCI site, divided by the PAT thickness without a plaque in the same vessel. PAT ratios were divided into low, mid and high tertile groups. Epicardial adipose tissue (EAT) thickness was measured at the eight points surrounding the heart. Multivariate logistic analysis was performed to determine whether the PAT ratio is predictive of vulnerable plaques (positive remodeling, low attenuation and/or spotty calcification) on CCTA or echo-attenuated plaque on IVUS. The Hounsfield unit of obstructive plaques >50% was lower in the high PAT group than in the mid and low PAT groups (47.5 ± 28.8 vs. 53.1 ± 29.7 vs. 64.7 ± 27.0, p = 0.04). In multivariate logistic analysis, a high PAT ratio was an independent, associated factor of vulnerable plaques on CCTA (OR: 3.55, 95% CI: 1.20-10.49), whereas mean EAT thickness was not (OR: 1.22, 95% CI: 0.82-1.83). We observed a similar result in predicting echo-attenuated plaque on IVUS. PAT ratio on CCTA was an associated factor of vulnerable plaques, while EAT was not. These results support the important concept of local effects of cardiac adipose tissue on plaque vulnerability.
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Affiliation(s)
- Ryo Okubo
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan.
| | - Rine Nakanishi
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Mikihito Toda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Daiga Saito
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Ippei Watanabe
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Takayuki Yabe
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Hideo Amano
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
| | - Tatsushi Hirai
- Gunma Cardiovascular Hospital, 1230 Nakao-machi, Takasaki, Gunma, 370-0001, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, 6-11-1 Omori-nishi, Ota-ku, Tokyo, 143-8541, Japan
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Manalo DL, Yamada K, Watanabe I, Miranda MEG, Lapiz SMD, Tapdasan E, Petspophonsakul W, Inoue S, Khawplod P, Nishizono A. A Comparative Study of the RAPINA and the Virus-Neutralizing Test (RFFIT) for the Estimation of Antirabies-Neutralizing Antibody Levels in Dog Samples. Zoonoses Public Health 2016; 64:355-362. [PMID: 27863040 DOI: 10.1111/zph.12313] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Indexed: 11/27/2022]
Abstract
The mass vaccination of dogs against rabies is a highly rational strategy for interrupting the natural transmission of urban rabies. According to the World Organization for Animal Health (OIE) and the World Health Organization (WHO), the immunization of at least 70% of the total dog population minimizes the risk of endemic rabies. Knowledge of the virus-neutralizing antibody (VNA) level against the rabies virus (RABV) is required to evaluate protective immunity and vaccine coverage of dogs in the field. The rapid focus fluorescent inhibition test (RFFIT) and the fluorescent antibody virus neutralization (FAVN) test are recommended by OIE and WHO to determine the VNA levels in serum. However, these tests are cell culture based and require the use of live viruses and specialized equipment. The rapid neutralizing antibody test (RAPINA) is a novel, immunochromatographic test that uses inactivated virus to estimate the VNA level qualitatively. It is a simple, rapid and inexpensive, although indirect, assay for the detection of VNA levels. The RAPINA has shown good positive and negative predictive values and a high concordance with the RFFIT results. In this study, we compared the performance of the two tests for evaluating the vaccination status of dogs in the Philippines, Thailand and Japan. A total of 1135 dog sera were analysed by the RAPINA and compared to the VNA levels determined by the RFFIT. The overall positive and negative predictive values of the RAPINA were 96.2-99.3% and 84.5-94.8%, respectively, with a concordance (kappa) of 0.946-0.97 among the three countries. The RAPINA results were highly homologous and reproducible among different laboratories. These results suggest that this test is appropriate to survey vaccination coverage in countries with limited resources.
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Affiliation(s)
- D L Manalo
- Department of Health, Research Institute for Tropical Medicine (RITM-DOH), Alabang, Philippines
| | - K Yamada
- Research Promotion Institute, Faculty of Medicine, Oita University, Hasama-machi, Yufu City, Oita, Japan
| | - I Watanabe
- Department of Microbiology, Faculty of Medicine, Oita University, Hasama-machi, Yufu City, Oita, Japan
| | - M E G Miranda
- Department of Health, Research Institute for Tropical Medicine (RITM-DOH), Alabang, Philippines
| | - S M D Lapiz
- Office of the Provincial Veterinarian, Tagbilaran, Bohol, Philippines
| | - E Tapdasan
- Office of the Provincial Veterinarian, Tagbilaran, Bohol, Philippines
| | - W Petspophonsakul
- Department of Microbiology, Faculty of Medicine, Chiang Mai University, Lanna Dog Welfare, Chiang Mai, Thailand
| | - S Inoue
- Department of Veterinary Medicine, National Institute of Infectious Diseases, Tokyo, Japan
| | - P Khawplod
- Queen Saovabha Memorial Institute, Thai Red Cross Society, Bangkok, Thailand
| | - A Nishizono
- Department of Microbiology, Faculty of Medicine, Oita University, Hasama-machi, Yufu City, Oita, Japan
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Kiuchi S, Hisatake S, Watanabe I, Toda M, Kabuki T, Oka T, Dobashi S, Ikeda T. Pulse Pressure and Upstroke Time Are Useful Parameters for the Diagnosis of Peripheral Artery Disease in Patients With Normal Ankle Brachial Index. Cardiol Res 2016; 7:161-166. [PMID: 28197286 PMCID: PMC5295562 DOI: 10.14740/cr508e] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2016] [Indexed: 01/11/2023] Open
Abstract
Background Some peripheral artery disease (PAD) patients have normal ankle brachial index (ABI) (0.9 - 1.4), although ABI is a useful parameter for the diagnosis of PAD. We investigated whether other parameters of ABI report sheet are useful to detect these patients. Methods We initially enrolled 3,912 patients (7,824 limbs) who underwent ABI for the first time. Subjects who have normal ABI were divided into the PAD group (n = 136) and the non-PAD group (n = 240) by lower extremity ultrasonography. We investigated blood pressures (BP) (systolic (SBP), diastolic (DBP), mean (mBP) and pulse pressure (PP)), heart rate, upstroke time (UT), and %mean arterial pressure (%MAP). Results SBP, mBP, PP, UT, and %MAP in the PAD group were significantly higher. A multivariate analysis showed that mBP, DBP, PP, UT and %MAP were independently associated with the presence of PAD (mBP: odds ratio (OR) 2.30, 95% confidence interval (CI) 1.22 - 4.37, P = 0.010; DBP: OR 0.52, 95% CI 0.28 - 0.97, P = 0.039; PP: OR 1.30, 95% CI 0.69 - 2.46, P = 0.041; UT: OR 3.40, 95% CI 2.03 - 5.83, P < 0.001; %MAP: OR 1.77, 95% CI 1.05 - 2.98, P = 0.031). Maximal area under the curve (AUC) of BPs for associating PAD was PP. The cut-off value of PP was 53.0 mm Hg (sensitivity 0.500, specificity 0.721, AUC 0.628, 95% CI 0.569 - 0.687). Conclusions The present study demonstrated that BPs are associated with PAD in patients with normal ABI. The measurement of BPs could provide additional information for the diagnosis of PAD.
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Affiliation(s)
- Shunsuke Kiuchi
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Shinji Hisatake
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Ippei Watanabe
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Mikihito Toda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takayuki Kabuki
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takashi Oka
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Shintaro Dobashi
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
| | - Takanori Ikeda
- Department of Cardiovascular Medicine, Toho University Faculty of Medicine, Tokyo, Japan
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Kiuchi S, Hisatake S, Watanabe I, Kabuki T, Oka T, Dobashi S, Fujii T, Ikeda T. Safety Assessment of Anti-Tachycardia Therapy for Supraventricular Tachyarrhythmia in Patients with Acute Heart Failure. J Card Fail 2016. [DOI: 10.1016/j.cardfail.2016.07.339] [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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Abstract
BACKGROUND Substantial evidence indicates that molecular hydrogen (H2) has beneficial vascular effects because of its antioxidant and/or anti-inflammatory effects. Thus, hydrogen-rich water may prove to be an effective anti-aging drink. This study examined the effects of H2on endothelial senescence and clarified the mechanisms involved. METHODS AND RESULTS Hydrogen-rich medium was produced by a high-purity hydrogen gas generator. Human umbilical vein endothelial cells (HUVECs) were incubated with 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) for various time periods in normal or hydrogen-rich medium. The baseline H2concentration in hydrogen-rich medium was 0.55±0.07 mmol/L. This concentration gradually decreased, and H2was almost undetectable in medium after 12 h. At 24 h after TCDD exposure, HUVECs treated with TCDD exhibited increased 8OHdG and acetyl-p53 expression, decreased nicotinamide adenine dinucleotide (NAD(+))/NADH ratio, impaired Sirt1 activity, and enhanced senescence-associated β-galactosidase. However, HUVECs incubated in hydrogen-rich medium did not exhibit these TCDD-induced changes accompanying Nrf2 activation, which was observed even after H2was undetectable in the medium. Chrysin, an inhibitor of Nrf2, abolished the protective effects of H2on HUVECs. CONCLUSIONS H2has long-lasting antioxidant and anti-aging effects on vascular endothelial cells through the Nrf2 pathway, even after transient exposure to H2. Hydrogen-rich water may thus be a functional drink that increases longevity. (Circ J 2016; 80: 2037-2046).
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Affiliation(s)
- Fumihiko Hara
- Department of Cardiovascular Medicine, Toho University School of Medicine
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