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Muacevic A, Adler JR, Oniki T, Nobe S, Takahashi N. Acute Heart Failure in an Almost-Centenarian Patient With Symptomatic Severe Aortic Stenosis Treated With Ivabradine. Cureus 2022; 14:e32142. [PMID: 36601174 PMCID: PMC9805905 DOI: 10.7759/cureus.32142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/02/2022] [Indexed: 12/04/2022] Open
Abstract
We report the case of a 99-year-old woman with acute chest pain caused by myocardial ischemia due to severe aortic stenosis (AS) and severe anemia. Red blood cells were transfused; however, this increased the preload and worsened pulmonary congestion. Treatment with drugs and non-invasive positive pressure ventilation could not sufficiently improve the pulmonary congestion. Ivabradine was administered to control the resting heart rate, following which the pulmonary congestion significantly improved. Ivabradine is a promising drug for acute heart failure of patients with AS by improving cardiac output by prolonging the left ventricular diastolic filling time without a negative inotropic effect.
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Ishii Y, Abe I, Kira S, Harada T, Takano M, Oniki T, Kondo H, Teshima Y, Yufu K, Shuto T, Wada T, Nakagawa M, Shimada T, Asayama Y, Miyamoto S, Takahashi N. Detection of fibrotic remodeling of epicardial adipose tissue in patients with atrial fibrillation: Imaging approach based on histological observation. Heart Rhythm O2 2021; 2:311-323. [PMID: 34430935 PMCID: PMC8369308 DOI: 10.1016/j.hroo.2021.05.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [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: 11/09/2022] Open
Abstract
Background Fibrotic remodeling of epicardial adipose tissue (EAT) is crucial for proinflammatory atrial myocardial fibrosis, which leads to atrial fibrillation (AF). Objectives We tested the hypothesis that the ratio of central to marginal adipocyte diameter in EAT represents its fibrotic remodeling. Based on a similar concept, we also tested whether the percent (%) change in EAT fat attenuation determined using computed tomographic (CT) images can detect this remodeling. Methods Left atrial appendages were obtained from 76 consecutive AF patients during cardiovascular surgery. EAT in the central area (central EAT: C-EAT) and that adjacent to the atrial myocardium (Marginal EAT: M-EAT) were evaluated histologically. CT images for all of the 76 patients were also analyzed. Results The adipocyte diameter was smaller, fibrotic remodeling of EAT (EAT fibrosis) was more severe, and infiltration of macrophages and myofibroblasts was more extensive in M-EAT than in C-EAT. EAT fibrosis was positively correlated with adipocyte diameter in C-EAT and negatively correlated in M-EAT, resulting in a positive correlation between EAT fibrosis and the ratio of central to marginal adipocyte diameter (C/M diameter ratio; r = 0.73, P < .01). The C/M diameter ratio was greater in patients with persistent AF than in those with paroxysmal AF. CT images demonstrated that the %change in EAT fat attenuation was positively correlated with EAT fibrosis. Conclusion Our results suggest that the central-to-marginal adipocyte diameter ratio is tightly associated with fibrotic remodeling of EAT. In addition, the %change in EAT fat attenuation determined using CT imaging can detect remodeling noninvasively.
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Affiliation(s)
- Yumi Ishii
- Department of Cardiology and Clinical Examination
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination
| | | | | | | | | | | | | | - Kunio Yufu
- Department of Cardiology and Clinical Examination
| | | | | | | | - Tatsuo Shimada
- Oita Medical Technology School, College of Judo Therapy and Acupuncture-Moxibustion, Oita, Japan
| | - Yoshiki Asayama
- Department of Radiology, Oita University Faculty of Medicine, Oita, Japan
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Kira S, Abe I, Ishii Y, Miyoshi M, Oniki T, Arakane M, Daa T, Teshima Y, Yufu K, Shimada T, Takahashi N. Role of angiopoietin-like protein 2 in atrial fibrosis induced by human epicardial adipose tissue: Analysis using an organo-culture system. Heart Rhythm 2020; 17:1591-1601. [PMID: 32330625 DOI: 10.1016/j.hrthm.2020.04.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 10/18/2019] [Revised: 04/02/2020] [Accepted: 04/12/2020] [Indexed: 11/17/2022]
Abstract
BACKGROUND We have recently reported that peri-left atrial epicardial adipose tissue (EAT) is associated with atrial myocardial fibrosis, in which angiopoietin-like protein 2 (Angptl2) protein content in EAT is associated with atrial myocardial fibrosis. OBJECTIVE This study aimed to examine whether Angptl2 contained in peri-left atrial EAT can induce atrial myocardial fibrosis. METHODS Human peri-left atrial EAT and abdominal subcutaneous adipose tissue (SAT) were collected from 9 autopsy cases. EAT- or SAT-conditioned medium was dropped onto the rat left atrial epicardial surface using an organo-culture system. Conditioned medium, recombinant Angptl2, and its antibody effects on organo-cultured rat atrial myocardial fibrosis were evaluated. Angptl2 effects on cultured neonatal rat fibroblasts were also investigated. RESULTS EAT-conditioned medium induced atrial fibrosis in organo-cultured rat atrium with a progressive increase in the number of myofibroblasts. The profibrotic effect of EAT was greater than that of SAT. EAT in patients with atrial fibrillation induced a more significant atrial fibrosis than in those without. Treatment with human recombinant Angptl2 induced fibrosis in organo-cultured rat atrium, which was suppressed by the concomitant treatment with Angptl2 antibody. In cultured fibroblasts, Angptl2 upregulated the expression of α-smooth muscle actin, transforming growth factor-β1, phospho-extracellular signal-regulated kinase,phospho-inhibitor of κBα, and phospho-p38 mitogen-activated protein kinase. CONCLUSION This study demonstrated that Angptl2 contained in EAT played a crucial role in EAT-induced inflammatory atrial fibrosis. The results also suggested that antagonizing the expression of Angptl2 in EAT can be a novel therapeutic approach to prevent atrial fibrillation.
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Affiliation(s)
- Shintaro Kira
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan.
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Miho Miyoshi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Takahiro Oniki
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Motoki Arakane
- Department of Diagnostic Pathology, Oita University Faculty of Medicine, Oita, Japan
| | - Tsutomu Daa
- Department of Diagnostic Pathology, Oita University Faculty of Medicine, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan
| | - Tatsuo Shimada
- Oita Medical Technology School, Japan College of Judo-Therapy Acupuncture & Moxibustion Therapy, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Oita University Faculty of Medicine, Oita, Japan.
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Oniki T, Teshima Y, Nishio S, Ishii Y, Kira S, Abe I, Yufu K, Takahashi N. Hyponatraemia aggravates cardiac susceptibility to ischaemia/reperfusion injury. Int J Exp Pathol 2020; 100:350-358. [PMID: 31994291 DOI: 10.1111/iep.12338] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Revised: 01/16/2019] [Accepted: 11/07/2019] [Indexed: 01/04/2023] Open
Abstract
Hyponatraemia is defined as a serum sodium concentration of <135 mEql/L and is the most common electrolyte disturbance in patients with chronic heart failure. We hypothesize that hyponatraemia may induce Ca2+ overload and enhance reactive oxygen species (ROS) production, which will exacerbate myocardial injury more than normonatraemia. We investigated the effect of hyponatraemia on the ability of the heart to recover from ischaemia/reperfusion episodes. Cardiomyocytes were obtained from 1- to 3-day-old Sprague Dawley rats. After isolation, cardiomyocytes were placed in Dulbecco's modified Eagle's medium (DMEM) containing low sodium concentration (110, 120, or 130 mEq/L) or normal sodium concentration (140 mEq/L) for 72 hours. Exposure of cardiomyocytes to each of the low-sodium medium significantly increased both ROS and intracellular Ca2+ levels compared with the exposure to the normal-sodium medium. In vivo, 8-week-old male Sprague Dawley rats were divided into four groups: control group (Con), furosemide group (Fur), low-sodium diet group (Lsd) and both furosemide and low-sodium diet group (Fur + Lsd). The hearts subjected to global ischaemia exhibited considerable decrease in left ventricular developed pressure during reperfusion, and the size of infarcts induced by ischaemia/reperfusion significantly increased in the Fur, Lsd and Fur + Lsd compared with that in the Con. Hyponatraemia aggravates cardiac susceptibility to ischaemia/reperfusion injury by Ca2+ overload and increasing in ROS levels.
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Affiliation(s)
- Takahiro Oniki
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Satoru Nishio
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Shintaro Kira
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University, Yufu city, Japan
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Ishii Y, Yufu K, Kira S, Miyoshi M, Abe I, Oniki T, Kondo H, Saito S, Fukui A, Okada N, Akioka H, Shinohara T, Teshima Y, Nakagawa M, Takahashi N. 4090Maximum standardized uptake value of pericardial fat for prediction of ventricular arrhythmias in patients with cardiac sarcoidosis. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz745.0102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Cardiac sarcoidosis is a cause of epicarditis and sustained life-threatening ventricular arrhythmias. These arrhythmias occasionally arise from epicardial. Positron emission tomogramphy-comututed tomography (PET-CT) is useful for diagnosis with sarcoidosis. However, the usefulness for prediction of ventricular arrhythmias in patients with cardiac sarcoidosis is unknown.
Objective
We hypothesized that the evaluation of pericardial fat inflammation could identify high-risk sarcoidosis patients for ventricular arrhythmias.
Methods
We enrolled 20 consecutive patients with cardiac sarcoidosis performed PET-CT between August 2016 and December 2018. In each case, we measured the maximum standardized uptake value (SUVmax) of pericardial fat around the left atrium, both ventricules, atrioventricular groove, and left main coronary.
Results
Seven patients experienced ventricular tachycardia (VT) or ventricular fibrillation (VF). VT/VF patients had significantly more complete right bundle branch block (P=0.035), larger left atrial dimension (P=0.021), larger left ventricular end-diastolic dimension (P=0.005), lower ejection fraction (P=0.007), and higher E/e' (P=0.004). SUVmax of pericardial fat in the roof of left atrium (LA) and left ventricular (LV) with VT/VF patients were significantly higher than non-VT/VF patients (LA: 1.63 vs 1.32, P=0.0311; LV: 1.84 vs 1.26, P=0.045). The cut-off values of SUVmax derived from the ROC curve in the roof of LA and LV are 1.47 and 1.59 respectively. The Kaplan Meire estimator showed that high SUVmax patients in the roof of LA had significantly more detection of NSVT.
Conclusions
Our results suggest the relationship between SUVmax and VT/VF occurrence in patients with cardiac sarcoidosis. The evaluateon of SUVmax may be useful for VT/VF risk stratification.
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Affiliation(s)
- Y Ishii
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - K Yufu
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - S Kira
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - M Miyoshi
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - I Abe
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - T Oniki
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - H Kondo
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - S Saito
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - A Fukui
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - N Okada
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - H Akioka
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - T Shinohara
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - Y Teshima
- Oita University, Department of Cardiology and Clinical Examination, Faculty of Medicine, Yufu, Japan
| | - M Nakagawa
- Oita University, Department of Medical Education Center, Faculty of Medicine, Yufu, Japan
| | - N Takahashi
- Oita University, Department of Medical Education Center, Faculty of Medicine, Yufu, Japan
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Kira S, Abe I, Teshima Y, Ishii Y, Miyoshi M, Oniki T, Fukui A, Shinohara T, Shimada T, Yufu K, Nakagawa M, Takahashi N. P1628Angiopoietin-like protein (Angptl) 2 secreted from epicardial adipose tissue induces atrial myocardial fibrosis. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0387] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Using excised human left atrial appendage samples, we previously demonstrated that epicardial adipose tissue (EAT) are highly associated with atrial myocardial fibrosis as a substrate of atrial fibrillation (AF). We also reported the relationship between Angptl2 in EAT and atrial fibrosis. However, the mechanism is not clear. The purpose is to clarify the mechanisms underlying the effect of EAT on the atrial myocardium.
Methods
Human peri-left atrial EAT and abdominal subcutaneous adipose tissue (SAT) samples were obtained from 6 cases (2 females, 70.2±13.2 years). 50 mg of EAT and SAT were quickly washed with PBS and centrifuged 1min at 1200rpm. After 3 times this procedures, adipose tissues were cultured in DMEM F12 medium with Fetal bovine Serum (FBS) overnight.
After pre-incubation, EAT and SAT tissues were washed and centrifuge d three times and cultured in medium without FBS for 24hours. Finally, we collected oozed medium (conditioned medium) and used for experiments.
Concentrations of Angptl2 in conditioned medium were measured by ELISA.
To study the effects of conditioned medium, we used “organo-culture” system. Isolated atrium from 8week old male Sprague-Dawley rats were placed on the porous membrane with the endothelial face toward the membrane. After that, loading medium (conditioned medium:culture medium = 1:4), culture medium (control), or recombinant Angptl2 were dropped onto the epicardial face of the atrium once a day and incubated for 7 days (37°C, 5% CO2).
Then, histological and immunohistochemical analysis were performed. We also performed quantitative reverse transcription–polymerase chain reaction (RT–PCR) analysis.
Next, we isolated and cultured neonatal rat fibroblast and loaded Angptl2 for 24 hours.After collected these cells, we performed western blotting analysis.
Results
Atria organo-culture incubated for 7 days with conditioned medium showed global fibrosis. At epicardial side, fibrotic area of EAT group was significantly greater compared to that of SAT and control group (P<0.05).
mRNA of Col1a1, col3a1 and TGFβ1 were significantly increased in EAT group compared with the SAT and control group.
And, the concentration of conditioned medium created from EAT was significant higher than that from SAT (P<0.05).
Then, we dropped 500 ng/ml of recombinant Angptl2 onto the rat atria. Fibrotic area of Angptl22 group significantly greater than that of control with increasing number of α-SMA positive cells, and mRNA of col3a1 and TGFβ1 were significantly increased in Angptl2 group compared with control group.
In cultured fibroblasts, α-SMA and p-ERK expression were increased in Angptl2 group measured by western blotting analysis.
Conclusions
Our results demonstrated that EAT rather than SAT induces atrial myocardial fibrosis. There is a possibility that Angptl2 effused from EAT plays a part in atrial fibrosis thought EAT paracrine effect.
Acknowledgement/Funding
ONO PHARMACEUTICAL CO
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Affiliation(s)
- S Kira
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - I Abe
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - Y Teshima
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - Y Ishii
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - M Miyoshi
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - T Oniki
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - A Fukui
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - T Shinohara
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - T Shimada
- Oita College of Judo Therapy & Acupuncture & Moxibustion, Oita, Japan
| | - K Yufu
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - M Nakagawa
- Oita University, Medical Education Center, Yufu, Japan
| | - N Takahashi
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
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Kondo H, Kira S, Oniki T, Saito S, Teshima Y, Takahashi N. P4775Remarkable cardioprotective effect of interleukin-10 on sinus node dysfunction caused by streptozotocin-induced hyperglycemia in mice. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p4775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H Kondo
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - S Kira
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - T Oniki
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - S Saito
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - Y Teshima
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
| | - N Takahashi
- Oita University, Cardiology and Clinical Examination, Yufu, Japan
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Kondo H, Kira S, Oniki T, Gotoh K, Fukui A, Abe I, Ikebe Y, Kawano K, Saito S, Aoki K, Okada N, Nagano Y, Akioka H, Shinohara T, Akiyoshi K, Masaki T, Teshima Y, Yufu K, Nakagawa M, Takahashi N. Interleukin-10 treatment attenuates sinus node dysfunction caused by streptozotocin-induced hyperglycaemia in mice. Cardiovasc Res 2018; 115:57-70. [DOI: 10.1093/cvr/cvy162] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 06/20/2018] [Indexed: 12/23/2022] Open
Affiliation(s)
- Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Shintaro Kira
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Takahiro Oniki
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Koro Gotoh
- Department of Endocrinology, Metabolism, Rheumatology and Nephrology, Oita University, Facultyof Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Akira Fukui
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Yuki Ikebe
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Kyoko Kawano
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Shotaro Saito
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Kohei Aoki
- Department of Endocrinology, Metabolism, Rheumatology and Nephrology, Oita University, Facultyof Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Norihiro Okada
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Yasuko Nagano
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Hidefumi Akioka
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Kumiko Akiyoshi
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Takayuki Masaki
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Mikiko Nakagawa
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasama, Oita, Japan
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9
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Kondo H, Abe I, Gotoh K, Fukui A, Takanari H, Ishii Y, Ikebe Y, Kira S, Oniki T, Saito S, Aoki K, Tanino T, Mitarai K, Kawano K, Miyoshi M, Fujinami M, Yoshimura S, Ayabe R, Okada N, Nagano Y, Akioka H, Shinohara T, Akiyoshi K, Masaki T, Teshima Y, Yufu K, Nakagawa M, Takahashi N. Interleukin 10 Treatment Ameliorates High-Fat Diet–Induced Inflammatory Atrial Remodeling and Fibrillation. Circ Arrhythm Electrophysiol 2018; 11:e006040. [DOI: 10.1161/circep.117.006040] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 03/20/2018] [Indexed: 12/19/2022]
Affiliation(s)
- Hidekazu Kondo
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Koro Gotoh
- and Department of Endocrinology, Metabolism, Rheumatology and Nephrology (K.G., K.A., T.M.)
| | - Akira Fukui
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Hiroki Takanari
- Oita University Faculty of Medicine, Japan. Clinical Research Center for Diabetes, Tokushima University Hospital, Japan (H.T.)
| | - Yumi Ishii
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Yuki Ikebe
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Shintaro Kira
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Takahiro Oniki
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Shotaro Saito
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Kohei Aoki
- and Department of Endocrinology, Metabolism, Rheumatology and Nephrology (K.G., K.A., T.M.)
| | - Tomomi Tanino
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Kazuki Mitarai
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Kyoko Kawano
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Miho Miyoshi
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Mami Fujinami
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Seiichiro Yoshimura
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Reika Ayabe
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Norihiro Okada
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Yasuko Nagano
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Hidefumi Akioka
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Tetsuji Shinohara
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Kumiko Akiyoshi
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Takayuki Masaki
- and Department of Endocrinology, Metabolism, Rheumatology and Nephrology (K.G., K.A., T.M.)
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Mikiko Nakagawa
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
| | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination (H.K., I.A., A.F., Y.I., S.K., T.O., S.S., T.T., K.M., K.K., M.M., M.F., S.Y., R.A., N.O., Y.N., H.A., T.S., K.A., Y.T., K.Y., M.N., N.T.)
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Sonoda Y, Teshima Y, Abe I, Ebata Y, Oniki T, Kira S, Kondo H, Saito S, Yufu K, Miyamoto S, Shimada T, Takahashi N. Macrophage Infiltration Into the Endothelium of Atrial Tissue in Atrial Fibrillation. Circ J 2017; 81:1742-1744. [PMID: 28381703 DOI: 10.1253/circj.cj-16-1072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yuko Sonoda
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Yasushi Teshima
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Ichitaro Abe
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Yuki Ebata
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Takahiro Oniki
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Shintaro Kira
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Hidekazu Kondo
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Shotaro Saito
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Kunio Yufu
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
| | - Shinji Miyamoto
- Department of Cardiovascular Surgery, Faculty of Medicine, Oita University
| | | | - Naohiko Takahashi
- Department of Cardiology and Clinical Examination, Faculty of Medicine, Oita University
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11
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Kume O, Teshima Y, Abe I, Ikebe Y, Oniki T, Kondo H, Saito S, Fukui A, Yufu K, Miura M, Shimada T, Takahashi N. Role of atrial endothelial cells in the development of atrial fibrosis and fibrillation in response to pressure overload. Cardiovasc Pathol 2017; 27:18-25. [DOI: 10.1016/j.carpath.2016.12.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 11/09/2016] [Accepted: 12/06/2016] [Indexed: 01/06/2023] Open
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12
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Kimura N, Kumamoto T, Oniki T, Nomura M, Nakamura K, Abe Y, Hazama Y, Ueyama H. Role of ubiquitin-proteasome proteolysis in muscle fiber destruction in experimental chloroquine-induced myopathy. Muscle Nerve 2009; 39:521-8. [DOI: 10.1002/mus.21223] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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13
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Shimizu K, Kondo R, Sakai K, Takeda N, Nagahata T, Oniki T. Novel vitamin E derivative with 4-substituted resorcinol moiety has both antioxidant and tyrosinase inhibitory properties. Lipids 2001; 36:1321-6. [PMID: 11834083 DOI: 10.1007/s11745-001-0847-9] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A novel vitamin E derivative, (6"-hydroxy-2",5",7",8"-tetramethylchroman-2"-yl)methyl 3-(2',4'-dihydroxyphenyl)propionate (TM4R), which has a chromanoxyl ring and 4-substituted resorcinol moieties, was synthesized; and its inhibitory effects on tyrosinase, antioxidant ability, and lightening effect of ultraviolet B (UVB)-induced hyperpigmentation were estimated. TM4R showed potent inhibitory activity on tyrosinase, which is the rate-limiting enzyme in melanogenesis. The scavenging activities of TM4R on 1,1-diphenyl-2-picrylhydrazyl and hydroxyl radicals were found to be nearly the same as those of alpha-tocopherol. Furthermore, an efficient lightening effect was observed following topical application of TM4R to UVB-stimulated hyperpigmented dorsal skin of brownish guinea pigs. These results suggest that TM4R may be a candidate for an efficient whitening agent, possibly by inhibiting tyrosinase activity and biological reactions caused by reactive oxygen species.
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Affiliation(s)
- K Shimizu
- Department of Forest Products, Faculty of Agriculture, Kyushu University Graduate School, Fukuoka, Japan
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14
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Veljovic-Jovanovic S, Milovanovic L, Oniki T, Takahama U. Inhibition of catalase by sulfite and oxidation of sulfite by H2O2 cooperating with ascorbic acid. Free Radic Res 1999; 31 Suppl:S51-7. [PMID: 10694041 DOI: 10.1080/10715769900301321] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
An oxidative detoxification of sulfite, which originates from sulfur dioxide taken up into a leaf, has not yet been fully understood. In this study, we discuss that redox reactions between sulfite and H2O2 have an important role for the detoxification of sulfite. Sulfite was oxidized by H2O2 and during the redox reaction, oxygen consumption was observed. The oxygen consumption was partially inhibited by superoxide dismutase, indicating that O2- is generated during the redox reaction. Oxidation of sulfite by H2O2 was also observed in the presence of ascorbic acid, and during the oxidation, no significant oxidation of ascorbic acid and no consumption of oxygen were observed. Sulfite inhibited catalase of cell-free extracts of spinach, pea and broad bean leaves. These results suggest that when leaves are fumigated with SO2 in the light, catalase is inactivated resulting in the accumulation of H2O2 in leaves, which can oxidize sulfite without generating active oxygen species like O2- as long as ascorbate is present in leaves.
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15
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Yokota T, Mitani K, Saito Y, Oniki T, Hayashi M. Continuous drop type of orthostatic hypotension. J Neurol Neurosurg Psychiatry 1999; 67:255-6. [PMID: 10475763 PMCID: PMC1736466 DOI: 10.1136/jnnp.67.2.255a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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16
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Oniki T. Arterial remodelling and eccentricity of plaque. Heart 1998; 80:633. [PMID: 10065040 PMCID: PMC1728875 DOI: 10.1136/hrt.80.6.633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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17
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Abstract
It has been recognized that arterial enlargement occurs in relation to the formation of atherosclerotic plaque. Previous studies on arterial remodeling have disregarded the role of mechanical deformation and have suggested that compensatory mechanisms occur to maintain arterial flow. We postulated that primary atherosclerotic enlargement and mechanical deformation are the predominant causes of the arterial remodeling. This hypothesis better explains the morphological changes without suggesting additional biological reactions.
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Affiliation(s)
- T Oniki
- Department of Internal Medicine, Kawaguchi Kogyo General Hospital, Kawaguchi-shi, Saitama, Japan
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18
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Oniki T, Shimizu S, Iwakami M, Tanaka M, Hashimoto Y, Numano F. Quantitative assessment of diastolic filling function: a new Doppler echocardiographic method and in vitro validation. J Am Soc Echocardiogr 1996; 9:848-56. [PMID: 8943445 DOI: 10.1016/s0894-7317(96)90477-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The effects of changes in preload and chamber compliance on the transmitral flow pattern was investigated with a fluid dynamics model. A decrease in compliance led to a steepening of the deceleration slope and a shortening of the pressure half-time in both restricted and nonrestricted valves. An increase in the preload led to a longer pressure half-time but did not affect the slope in the restricted valve. However, increased preload led to a shorter pressure half-time and a steeper slope in the nonrestricted valve. A mathematically derived method to measure the net atrioventricular compliance (-[annular area] va/[pvt [flow deceleration rate]]), where va and vt are flow velocities at the mitral anulus and the mitral tip levels) was then proposed. The values obtained by this method showed a strong correlation with true values (r2 = 0.89). A possibility of noninvasive quantitative assessment of diastolic filling function was implied.
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Affiliation(s)
- T Oniki
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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19
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Abstract
We measured Doppler echocardiographic diastolic parameter during infusion of low-dose dobutamine in 14 untreated hypertensive subjects and in 14 normal controls. Low-dose dobutamine accelerated left ventricular relaxation in normal controls but not in hypertensive subjects.
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Affiliation(s)
- M Iwakami
- Third Department of Internal Medicine, Tokyo Medical and Dental University, Japan
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20
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Abstract
Alcohol is known to sometimes cause coronary spasm, the mechanism of which is still unknown. The authors monitored changes in plasma levels of prostanoids (thromboxane [TX B2], 6-keto prostaglandin F1 alpha [PGF1 alpha]), catecholamines (CA), serotonin (5-HT), cyclic nucleotides (cyclic adenosine monophosphate--cAMP, cyclic guanosine monophosphate--cGMP), and platelet aggregation after alcohol ingestion (Japanese rice wine 400 mL) in 8 patients with alcohol-induced variant angina and 8 healthy men as controls. Coronary spasm was confirmed to have been induced in 4 patients nine hours after alcohol challenge (VA[+]), when their plasma ethanol levels had already returned to a null level. Neither CA nor 5-HT levels showed any change after alcohol ingestion either in patients or controls, though controls showed high levels of CA during alcohol ingestion. TX B2 in VA(+) patients increased gradually after alcohol ingestion to reach up to a statistically significantly high level just before attack, as compared with those of controls and VA(-) patients, who, on the contrary, did not show such changes. The levels of 6-keto PGF1 alpha, however, which were significantly lower in patients than in controls before the test, exhibited a gradual increase in VA(+) patients in parallel with the increase in TX B2. No significant changes in cAMP levels between either controls or patients were present. On the contrary, cGMP levels had a gradual decrease in patients after alcohol ingestion. Especially six hours after alcohol ingestion, cGMP levels in VA(+) patients decreased so much as to make a statistically significant difference, as compared with the level in controls. Platelet aggregability in controls showed a decrease after alcohol ingestion, in spite of no change or even increase in patients. These data suggest that low levels of PGF1 alpha and the decrease of cGMP levels from alcohol ingestion play important roles in the mechanism of coronary spasm induced by alcohol ingestion.
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Affiliation(s)
- H Oda
- 3rd Department of Internal Medicine, Tokyo Medical and Dental University, Japan
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21
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Hashimoto Y, Oniki T, Kaneko E, Hata A, Matsumura A, Kobayashi T, Numano F. Concentric left ventricular hypertrophy in patients with Takayasu arteritis. Angiology 1993; 44:883-8. [PMID: 7902037 DOI: 10.1177/000331979304401106] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Although aortic regurgitation (AR) in patients with Takayasu arteritis (TA) is believed to be caused by dilatation of the aortic ring or thickening of the aortic cusps, the pattern of left ventricular hypertrophy (LVH) in these patients has not been described. To clarify the geometry of the LV in patients with TA that had been documented both echocardiographically and hemodynamically, the authors evaluated 22 patients with TA and severe AR (group 1), 10 with TA and systemic hypertension (group 2), and 17 with isolated severe AR of other etiologies (group 3). M-mode echocardiography showed that LV dimensions were smaller in groups 1 and 2 than in group 3 and that wall thickness was greater in group 1 than in group 3. The concentric hypertrophic ratio (CHR = wall thickness/LV end-diastolic dimension+wall thickness) was larger than group 1 (p < 0.001) and group 2 (p < 0.01) than in group 3. CHR was similar in groups 1 and 2. Systolic blood pressure was significantly increased in group 2 and showed a tendency to increase in group 1 as compared with group 3. The results confirmed the presence of concentric LVH related to a pressure overload in patients with TA, even when TA was complicated by severe AR.
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Affiliation(s)
- Y Hashimoto
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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22
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Abstract
The authors tested the hypothesis that ethanol or its metabolite acetaldehyde might interfere in cyclic guanosine monophosphate (GMP) metabolism in coronary smooth muscle cells. Ethanol at the physiologically relevant concentration of 4.0 mg/mL or more significantly decreased basal guanylate cyclase activity and inhibited activation of the enzyme by sodium nitroprusside (SNP) in cultured porcine coronary smooth muscle cells. Two isoforms of phosphodiesterase (PDE), cyclic GMP-specific form and calmodulin-stimulated form, were both inhibited by 12.0 mg/mL or more ethanol. Intact cell study revealed that although 12.0 mg/mL or more ethanol was needed to significantly decrease cyclic GMP accumulation in control cells, 4.0 mg/mL or more ethanol significantly inhibited the increase of cyclic GMP accumulation induced by 1 microns SNP. Acetaldehyde showed similar effects, but the concentrations involved were more than physiological. Thus, ethanol may decrease cellular cyclic GMP levels and attenuate cyclic GMP accumulation in response to SNP in coronary smooth muscle cells by inhibiting soluble guanylate cyclase activity at physiologically relevant concentrations.
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Affiliation(s)
- Y Kishi
- Third Department of Medicine, Tokyo Medical and Dental University, Japan
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Oniki T, Hashimoto Y, Aerbajinai W, Hata A, Matsumura A, Iwakami M, Numano F, Hiraoka M. Transesophageal echocardiographic recognition of a fistula between a coronary artery and the left atrium. J Am Soc Echocardiogr 1992; 5:628-30. [PMID: 1466888 DOI: 10.1016/s0894-7317(14)80329-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A 58-year-old woman with a prosthetic mitral valve and an anomalous single coronary artery received transesophageal echocardiography and was found to have a coronary artery--to--left atrium fistula. Because of its superior imaging quality, transesophageal color Doppler method is a useful diagnostic procedure.
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Affiliation(s)
- T Oniki
- Third Department of Internal Medicine, Tokyo Medical and Dental University, Japan
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Oniki T, Hashimoto Y, Shimizu S, Kakuta T, Yajima M, Numano F. Effect of increasing heart rate on Doppler indices of left ventricular performance in healthy men. Br Heart J 1992; 68:425-9. [PMID: 1449930 PMCID: PMC1025146 DOI: 10.1136/hrt.68.10.425] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
OBJECTIVE To investigate the effects of heart rate on the Doppler measurements of left ventricular function and to determine the normal pattern of rate dependency. SETTING University hospital specialising in internal medicine. PARTICIPANTS 14 healthy male volunteers 10 of whom were studied. INTERVENTION Transoesophageal atrial pacing. MAIN OUTCOME MEASURES At paced rates of 70, 80, and 90 ppm the ratio of early to late peak transmitral flow velocity (E/A) was 1.97 (0.28), 1.49 (0.21), and 0.95 (0.11) respectively; the ratio of early to late time-velocity integrals of transmitral flow (Ei/Ai) was 3.03 (0.51), 2.11 (0.24), and 1.14 (0.30) respectively; and the atrial filling fraction (AFF) was 0.17 (0.03), 0.21, (0.04), and 0.24 (0.04) (mean (SD)). RESULTS Heart rate showed a linear correlation with E/A (r2 = 0.806), Ei/Ai (r2 = 0.838), and AFF (r2 = 0.343). Neither the peak aortic flow velocity or the mean aortic flow acceleration showed significant changes during pacing at rates of 70, 80, 90, and 100 ppm. CONCLUSIONS E/A and Ei/Ai can be expected to decrease by 0.5 and 0.9 for each increase of 10 beats/min in heart rate. Knowledge of this relation may be useful for the development of algorithms to correct for heart rate when diastolic function is assessed.
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Affiliation(s)
- T Oniki
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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25
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Affiliation(s)
- T Kato
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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26
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Abstract
To characterize aortic regurgitation in patients with Takayasu arteritis, we studied 48 females with arteritis (mean age 47 +/- 12 years) by means of color Doppler echocardiography. Aortic regurgitation was confirmed in 32 out of 48 patients (67%) by color-flow mapping. Twenty-four patients had mild or no aortic regurgitation (group A), 9 had moderate (group B), and 15 had severe (group C) aortic regurgitation. We compared the echocardiographic data obtained from patients with Takayasu arteritis with those of 14 normal controls and 9 patients with severe aortic regurgitation of valvular origins (group V). The aortic root diameter (AOD) in group B (23 +/- 4 mm/M2) and group C (22 +/- 3 mm/M2) revealed a statistically significant large value as compared with that in group A (18 +/- 2 mm/M2) and normal controls (17 +/- 3 mm/M2). However, the differences, between groups B and C and groups C and V, were not significant. The AOD was not obviously dilated in a considerable number of group C patients. Aortic valve involvement was seen in several group C patients and moderate concentric left ventricular hypertrophy was present in all group C patients. Group C patients therefore, have concentric left ventricular hypertrophy but may or may not have dilatation of the aortic root which can be detected on echocardiography. We conclude that aortic valve involvement may cause aortic regurgitation in some patients with Takayasu arteritis and that aortic regurgitation is more common than previously believed.
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Affiliation(s)
- Y Hashimoto
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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27
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Oniki T, Hashimoto Y, Shimizu S, Iwakami M, Kato T, Aerbajinai W, Kishi Y, Yajima M, Numano F. Enhanced flow velocity increase through the left ventricular inflow tract of patients with isolated aortic regurgitation. Am J Cardiol 1992; 69:654-7. [PMID: 1536116 DOI: 10.1016/0002-9149(92)90159-v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Twenty-five patients with chronic aortic regurgitation (AR), and 12 control subjects were studied using Doppler echocardiography to investigate the effects of AR on transmitral flow. Peak early filling velocities at the levels of the mitral valve tips (E1) and annulus (E2) were measured, and the transmitral flow restriction index (delta E = (E1-E2)/E2) was obtained. Patients with AR were classified into 2 groups according to the ratio of the cross-sectional area of the regurgitant jet to that of the left ventricular outflow tract. Group I had the ratio less than 0.20, and group II had greater than or equal to 0.20. E2 in group II was lower than in control subjects, whereas E1 was not significantly different in any groups. delta E in group II was higher than in group I or in control subjects (p less than 0.05 and 0.01, respectively). delta E showed a significant correlation with the cross-sectional area ratio in all patients with AR (r = 0.70, p less than 0.01) and in group II (r = 0.82; p less than 0.01). Our data suggest that AR restricts early transmitral filling, and that delta E may indicate the increased driving pressure caused by flow restriction and is a useful hemodynamic index of AR.
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Affiliation(s)
- T Oniki
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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28
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Oniki T, Hashimoto Y, Fujinuma Y, Maruyama Y, Namba K, Yajima M, Numano F, Maezawa H. Hypervascular metastatic cardiac tumors: an unknown cause of mitral valve prolapse. Intern Med 1992; 31:78-81. [PMID: 1568048 DOI: 10.2169/internalmedicine.31.78] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
A 40-yr-old woman with alveolar soft-part sarcoma and multiple hypervascular cardiac tumors involving both left and right ventricles is reported. Papillary muscle dysfunction and mitral valve prolapse with mitral regurgitation were caused by the largest tumor in the left ventricle.
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Affiliation(s)
- T Oniki
- Third Department of Internal Medicine, Tokyo Medical and Dental University School of Medicine, Japan
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Abstract
Although it has been reported that the aortic regurgitation (AR) of patients with Takayasu arteritis is due to dilatation of the aortic ring, the geometry of the left ventricle (LV) has not been described. We compared the cardiac findings in patients with Takayasu arteritis (TA) and severe AR with those of patients having severe AR of other origins. Echocardiographically, wall thickness (WT) and the concentric hypertrophic ratio (WT/WT + left ventricular end-diastolic dimension) were greater in patients with TA. It is concluded that the LV of the TA patients revealed concentric hypertrophy even when AR was severe.
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Affiliation(s)
- Y Hashimoto
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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30
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Abstract
Thirty-eight women with Takayasu arteritis were studied using thallium-201 stress myocardial scintigraphy to assess the prevalence and pathophysiology of the perfusion abnormality. Twenty (53%) had abnormal scintigraphic findings (group A). Abnormal scans were divided into 3 groups: permanent defects in 6, reversible defects in 7 and slow washout in 7. The remaining 18 patients had normal scintigrams (group N). Group A had a tendency to be older and to have a high prevalence of complicated significant aortic regurgitation. Interventricular thickness plus left ventricular posterior wall thickness (26 +/- 7 vs 17 +/- 2 mm, p less than 0.01) and left ventricular mass (267 +/- 121 vs 133 +/- 39 g, p less than 0.01) were all greater in group A on echocardiography. The mean value of the central aortic pressure in systole was 170 +/- 15 mm Hg in the 7 catheterized patients in group A. Coronary ostial stenoses were present in 2 group A patients who showed reversible defects on scintigrams. These data indicate that the abnormal perfusion detected by imaging in patients with Takayasu arteritis was responsible for a decrease in coronary reserve or myocardial damage, or both, due to long-standing systemic hypertension or aortic regurgitation. Coronary artery disease should be considered if a reversible defect is present.
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Affiliation(s)
- Y Hashimoto
- Third Department of Internal Medicine, Tokyo Medical and Dental University, School of Medicine, Japan
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31
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Yanase O, Hashimoto Y, Nishizaki M, Ota T, Oniki T, Maruyama Y, Nomura S, Hosaka T, Tamaki H, Maezawa H. [Aortic dissection presenting aortic regurgitation induced by diastolic prolapse of an intimal flap into the left ventricle: a case report]. J Cardiogr 1985; 15:895-901. [PMID: 3837075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A case of aortic dissection associated with aortic regurgitation which was induced by diastolic prolapse of an intimal flap into the left ventricular outflow tract was reported. This 57-year-old man, referred for evaluation of sudden onset of chest oppression and a heart murmur, was hypertensive for several years. His admission blood pressure was 184/44 mmHg, and a systolic ejection murmur and a diastolic decrescendo murmur were audible along the left sternal border. Two-dimensional echocardiography revealed an intimal flap in the markedly enlarged aortic root. The intimal flap moved posteriorly in systole and anteriorly in diastole, and prolapsed into the left ventricular outflow tract during diastole. Associated with the movement of the intimal flap, an aortic cusp was shifted from its original position to the left ventricular outflow tract in diastole. Aortography disclosed type I aortic dissection and severe aortic regurgitation. After medical treatment for four months, the patient underwent a Bentall surgical procedure and recovered. Impaired coaptation of the aortic valve induced by diastolic prolapse of the intimal flap into the left ventricular outflow tract is a newly encountered echocardiographic finding in proximal aortic dissection.
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32
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Kawai M, Oniki T, Nishii K, Igarashi H, Wakabayashi T, Yamada N, Kimura T, Sano T, Hayama T, Maezawa H. [A case of adenocarcinoma complicating Barrett's esophagus]. Nihon Naika Gakkai Zasshi 1985; 74:577-81. [PMID: 4031586 DOI: 10.2169/naika.74.577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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33
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Abstract
The electron spin resonance (ESR) spectra of vanadyl ions (VO2+) adsorbed on amorphous calcium phosphate (ACP), formed under varying conditions, were measured at room temperature. They varied with the variation of the conditions and were different from those of other calcium phosphates. The present result suggests that ACP is a distinct and a separate compound from other calcium phosphates and that ACP is a noncrystalline form of Ca3 (PO4)2 X 3 H2O or a solid solution of the composition of Ca3(PO4)1.87(HPO4)0.2, which was proposed previously.
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34
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Abstract
The ESR spectra of oxovanadium(IV) ions, (VO2+), adsorbed on hydroxyapatite(OHAp), fluorhydroxyapatite(FHAp), Mg-containing tricalcium phosphate(Mg-TCP), .octacalcium phosphate (OCP), dicalcium phosphate dihydrate (DCPD), and amorphous calcium phosphate(ACP) were measured at room temperature. The ESR parameters of VO2+ adsorbed on these compounds were slightly different from one another and accordingly, the ESR technique by use of VO2+ was useful for an analysis of the calcium phosphates precipitated from supersaturated solutions. The ESR parameters of VO2+ adsorbed on ACP and Mg-TCP were found to be very similar to each other, suggesting that ACP and TCP resemble each other in the structure of their crystal surfaces.
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