1
|
Toyama M, Nakayama M, Akita S, Tomida T, Arai Y. [Aortic Valve Papillary Fibroelastoma Stated for Preoperative Twelve Years without Any Symptom: Report of a Case]. Kyobu Geka 2024; 77:222-225. [PMID: 38465496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
We experienced a case of papillary fibroelastoma of aortic valve, which had been located for preoperative 12 years without any symptom. We could assess tumor growth rate of 0.17 mm/year. Because of recent reports of recurrence, close follow-up should be continued.
Collapse
Affiliation(s)
- Masashi Toyama
- Department of Cardiovascular Surgery, Toyohashi Municipal Hospital, Toyohashi, Japan
| | | | | | | | | |
Collapse
|
2
|
Tobe A, Tanaka A, Tokuda Y, Shirai Y, Miyazaki T, Yuhara S, Akita S, Furusawa K, Ishii H, Mutsuga M, Murohara T. Transcatheter Aortic Valve Replacement for Bicuspid Aortic Stenosis With a Severely Calcified Raphe Using An Under-Sized SAPIEN 3 Valve: Sizing by the Circle Method and Deployment by the Pressure-Regulated Method. Cardiovascular Revascularization Medicine 2023; 53S:S149-S152. [PMID: 36031540 DOI: 10.1016/j.carrev.2022.08.025] [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: 07/24/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 11/24/2022]
Abstract
Transcatheter aortic valve replacement (TAVR) for bicuspid aortic valve stenosis is challenging, and the absence of established methods for sizing the bicuspid aortic valve (BAV) complicates TAVR. We report a case of successful TAVR for bicuspid aortic stenosis with a severely calcified raphe. We used an undersized SAPIEN 3 valve, with three safety measures based on assessment of structural characteristics, sizing by the circle method, and deployment of the valve by the pressure-regulated method.
Collapse
Affiliation(s)
- Akihiro Tobe
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Akihito Tanaka
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshiyuki Tokuda
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshinori Shirai
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tatsuya Miyazaki
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Satoshi Yuhara
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenji Furusawa
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Ishii
- Department of Cardiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Masato Mutsuga
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
3
|
Kobayashi K, Akita T, Akita S, Ito H, Terazawa S, Mutsuga M, Usui A. Cardiac rehabilitation in a heart-failure patient using customized "cardiac support net" treatment: a case report. Nagoya J Med Sci 2023; 85:626-634. [PMID: 37829491 PMCID: PMC10565582 DOI: 10.18999/nagjms.85.3.626] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Accepted: 09/06/2022] [Indexed: 10/14/2023]
Abstract
At our hospital, we are conducting the "Clinical Study of a Patient-Specific Cardiac Support Net for Dilated Cardiomyopathy (jRCTs042180025)", a multi-facility clinical study of a customized cardiac support net (CSN). Here, we describe the cardiac rehabilitation (CR) of a heart failure (HF) patient after CSN treatment. The patient was a 65-year-old man who exhibited dilated cardiomyopathy (DCM) because of left ventricular non-compaction; his New York Heart Association status was class III. In November 2019, he received CSN treatment. The early CR program was adapted for this patient, and his postoperative course was uneventful. Functional measurements showed improved leg-muscle strength (before treatment: 61.4% BW; at discharge: 77.3% BW). During long-term follow-up, the patient's exercise tolerance increased, as shown by 6-minute walk distance (before treatment: 576 m; long-term follow-up: 600 m) and peak oxygen uptake (before treatment: 12.5 mL/kg/min; long-term follow-up: 13.3 mL/kg/min). In the 2 years since discharge, the patient has not been hospitalized for HF. This report is the first to show that the CSN can be used to perform a CR program in a DCM patient without significant functional decline.
Collapse
Affiliation(s)
| | - Toshiaki Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Ito
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sachie Terazawa
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Masato Mutsuga
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
4
|
Miki Y, Tanaka A, Tokuda Y, Tobe A, Shirai Y, Yuhara S, Akita S, Furusawa K, Ishii H, Mutsuga M, Murohara T. Clinical implications of the cardio-ankle vascular index before and after transcatheter aortic valve implantation. J Cardiovasc Med (Hagerstown) 2023; 24:302-307. [PMID: 36938820 DOI: 10.2459/jcm.0000000000001456] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
BACKGROUND Arterial stiffness indices are used to assess the material properties of the arterial wall and are associated with cardiovascular events. Aortic stenosis (AS) is commonly caused by degenerative calcification and can be associated with increased arterial stiffness. However, the clinical implications of arterial stiffness indices in AS patients before and after treatment are unknown. METHODS This single-center observational study enrolled 150 consecutive patients who underwent transcatheter aortic valve implantation (TAVI) for severe AS. The cardio-ankle vascular index (CAVI) was measured before and after TAVI. The patients were divided into two groups according to the CAVI values before and after TAVI: high CAVI group and low CAVI group. Patient and echocardiographic data and clinical outcomes, including cardiac death and hospitalization for heart failure (HF), were compared. RESULTS The pre- and postprocedural CAVI was 7.90 (6.75-9.30) and 9.65 (8.90-10.65), respectively. In the analyses with preprocedural CAVI, preprocedural echocardiographic aortic valve peak flow velocity was significantly lower in the high CAVI group. No significant differences between the two groups were observed in the occurrence of cardiac death or hospitalization for HF. In the analyses with postprocedural CAVI, B-type natriuretic peptide levels and E/e' ratio after TAVI were significantly higher in the high CAVI group. The composite of cardiac death and hospitalization occurrence for HF was significantly higher in the high CAVI group. CONCLUSION CAVI before TAVI is mainly affected by the AS severity, while CAVI after TAVI is associated with left ventricular diastolic dysfunction and late cardiac events, which may reflect arterial stiffness.
Collapse
Affiliation(s)
| | | | - Yoshiyuki Tokuda
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya
| | | | | | - Satoshi Yuhara
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya
| | | | - Hideki Ishii
- Department of Cardiology.,Department of Cardiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Masato Mutsuga
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya
| | | |
Collapse
|
5
|
Tobe A, Tanaka A, Tokuda Y, Shirai Y, Miyazaki T, Yuhara S, Akita S, Furusawa K, Ishii H, Mutsuga M, Murohara T. Impact of Albuminuria on the Prognosis After Transcatheter Aortic Valve Implantation. Am J Cardiol 2023; 186:156-162. [PMID: 36280473 DOI: 10.1016/j.amjcard.2022.09.020] [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] [Received: 07/19/2022] [Revised: 09/06/2022] [Accepted: 09/26/2022] [Indexed: 11/01/2022]
Abstract
The impact of preoperative albuminuria on the prognosis after transcatheter aortic valve implantation (TAVI) has not been studied. A total of 228 patients who underwent TAVI for severe aortic stenosis (AS) and for whom preoperative urinary data was available were retrospectively investigated. Patients were divided into two groups according to the urinary albumin-to-creatinine ratio (ACR): high (ACR≥ 30 mg/g) and low (ACR<30 mg/g). The urinary total protein-to-creatinine ratio (PCR) and dipstick proteinuria were also evaluated. The primary outcome was the composite outcome of all-cause death and readmission for heart failure. In total, 117 patients had a high ACR and 111 patients had a low ACR. During the median follow-up period of 467 days, patients with a high ACR had a higher incidence of the primary outcome than those with a low ACR (p<0.001). Patients with a high PCR or positive dipstick proteinuria were also at a higher risk for the primary outcome (p<0.001 and p=0.008, respectively). Multivariable Cox proportional hazards analysis showed a high ACR was independently associated with a primary outcome (hazard ratio, 4.98; 95% confidence interval, 1.84-13.49; p=0.002). In conclusion, preoperative albuminuria is an independent predictor of cardiac events in patients with severe AS undergoing TAVI.
Collapse
Affiliation(s)
- Akihiro Tobe
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Akihito Tanaka
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshiyuki Tokuda
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshinori Shirai
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tatsuya Miyazaki
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Satoshi Yuhara
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenji Furusawa
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Ishii
- Department of Cardiology, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Masato Mutsuga
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
6
|
Tobe A, Tanaka A, Tokuda Y, Akita S, Fujii T, Miki Y, Furusawa K, Ishii H, Usui A, Murohara T. Incidental findings on computed tomography for preoperative assessment before transcatheter aortic valve implantation in japanese patients. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1626] [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
Extra-cardiovascular incidental findings (IFs) on preoperative computed tomography (CT) are frequently observed in transcatheter aortic valve implantation (TAVI) candidates. However, the backgrounds of TAVI candidates and comorbidities differ based on the race and/or country, and data on IFs in a specific population are not always applicable to another.
Objective
To assess the prevalence, type, and clinical impact of IFs in Japanese TAVI candidates.
Methods
This was a retrospective, single-center, observational study. CT reports of 257 TAVI candidates were reviewed, and IFs were classified as (a) insignificant: findings that did not require further investigation, treatment, or follow-up; (b) intermediate: findings that needed to be followed up or were considered for further investigation but did not affect the planning of TAVI; and (c) significant: findings that required further investigation immediately or affected the planning of TAVI.
Results
At least one IF was found in 254 patients (98.8%). Insignificant, intermediate, and significant IFs were found in 253 (98.4%), 153 (59.5%), and 34 (13.2%) patients, respectively. Newly indicated significant IFs were found in 19 patients (7.4%). In 2 patients (0.8%), TAVI was canceled because of significant IFs. In patients who consequently underwent TAVI, the presence of significant IFs was not associated with the duration from CT performance to TAVI [28 (19–40) days vs. 27 (19–43) days, p=0.74] and all-cause mortality during the median follow-up period of 413 (223–805) days (p=0.44).
Conclusion
Almost all Japanese TAVI candidates had at least one IF, and the prevalence of significant IFs was not negligible. Although the presence of significant IFs was not associated with mid-term mortality, appropriate management of IFs was considered important.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- A Tobe
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - A Tanaka
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - Y Tokuda
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - S Akita
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - T Fujii
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - Y Miki
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - K Furusawa
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - H Ishii
- Fujita Health University Bantane Hospital, Cardiology, Aichi, Japan
| | - A Usui
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - T Murohara
- Nagoya University Hospital, Cardiology, Aichi, Japan
| |
Collapse
|
7
|
Tobe A, Tanaka A, Tokuda Y, Akita S, Fujii T, Miki Y, Furusawa K, Ishii H, Usui A, Murohara T. Regression of electrocardiographic left ventricular hypertrophy after transcatheter aortic valve replacement for aortic stenosis. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.1625] [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
The changes in electrocardiographic left ventricular hypertrophy (ECG-LVH) after transcatheter aortic valve replacement (TAVR) are not fully elucidated.
Methods
This retrospective single-center study investigated 156 patients who underwent TAVR for severe aortic stenosis. Twelve-leads ECGs obtained before and at 2 days and 1, 6 and 12 months after TAVR were analyzed. Patients with an implanted pacemaker, with a bundle branch block before or after TAVR or whose electrocardiogram at any measuring point was not available were excluded. As an assessment of ECG-LVH, Sokolow-Lyon voltage, Cornell voltage, Cornell product and Peguero–Lo Presti voltage were evaluated.
Results
Finally, 64 patients were included. Sokolow-Lyon voltage, Cornell voltage, Cornell product and Peguero–Lo Presti voltage significantly decreased between 1 and 6 months after TAVR compared to baseline. The prevalence of ECG-LVH criteria for each parameter decreased as well. QRS duration significantly decreased at 6 months after TAVR and the number of patients with strain pattern decreased significantly at 1 month when compared to baseline. When the patients were divided into two groups, those with and without ECG-LVH at baseline, ECG-LVH parameter values decreased significantly, especially in patients with ECG-LVH at baseline.
Conclusion
Regression of ECG-LVH after TAVR was demonstrated as per various criteria of ECG-LVH. The voltages and prevalence of ECG-LVH decreased significantly between 1 and 6 months after TAVR.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- A Tobe
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - A Tanaka
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - Y Tokuda
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - S Akita
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - T Fujii
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - Y Miki
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - K Furusawa
- Nagoya University Hospital, Cardiology, Aichi, Japan
| | - H Ishii
- Fujita Health University Bantane Hospital, Cardiology, Aichi, Japan
| | - A Usui
- Nagoya University Hospital, Cardiac Surgery, Aichi, Japan
| | - T Murohara
- Nagoya University Hospital, Cardiology, Aichi, Japan
| |
Collapse
|
8
|
Tobe A, Tanaka A, Tokuda Y, Miki Y, Furusawa K, Akita S, Fujii T, Tsutsumi Y, Ishii H, Iwano S, Naganawa S, Usui A, Murohara T. Incidental findings on computed tomography for preoperative assessment before transcatheter aortic valve implantation in Japanese patients. Heart Vessels 2021; 36:1911-1922. [PMID: 34081162 DOI: 10.1007/s00380-021-01875-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 05/14/2021] [Indexed: 10/21/2022]
Abstract
Extra-cardiovascular incidental findings (IFs) on preoperative computed tomography (CT) are frequently observed in transcatheter aortic valve implantation (TAVI) candidates. However, the backgrounds of TAVI candidates and comorbidities differ based on the race and/or country, and data on IFs in a specific population are not always applicable to another. The aim of this study was to assess the prevalence, type, and clinical impact of IFs in Japanese TAVI candidates. This was a retrospective, single-center, observational study. CT reports of 257 TAVI candidates were reviewed, and IFs were classified as (a) insignificant: findings that did not require further investigation, treatment, or follow-up; (b) intermediate: findings that needed to be followed up or were considered for further investigation but did not affect the planning of TAVI; and (c) significant: findings that required further investigation immediately or affected the planning of TAVI. At least one IF was found in 254 patients (98.8%). Insignificant, intermediate, and significant IFs were found in 253 (98.4%), 153 (59.5%), and 34 (13.2%) patients, respectively. Newly indicated significant IFs were found in 19 patients (7.4%). In 2 patients (0.8%), TAVI was canceled because of significant IFs. In patients who consequently underwent TAVI, the presence of significant IFs was not associated with the duration from CT performance to TAVI [28 (19-40) days vs. 27 (19-43) days, p = 0.74] and all-cause mortality during the median follow-up period of 413 (223-805) days (p = 0.44). Almost all Japanese TAVI candidates had at least one IF, and the prevalence of significant IFs was not negligible. Although the presence of significant IFs was not associated with mid-term mortality, appropriate management of IFs was considered important.
Collapse
Affiliation(s)
- Akihiro Tobe
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akihito Tanaka
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yoshiyuki Tokuda
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Miki
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenji Furusawa
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Taro Fujii
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yoshinori Tsutsumi
- Department of Radiological Technology, Nagoya University Hospital, Nagoya, Japan
| | - Hideki Ishii
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.,Department of Cardiology, Fujita Health University Bantane Hospital, Nagoya, Japan
| | - Shingo Iwano
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shinji Naganawa
- Department of Radiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
9
|
Tobe A, Tanaka A, Tokuda Y, Akita S, Fujii T, Miki Y, Furusawa K, Ishii H, Usui A, Murohara T. Regression of Electrocardiographic Left Ventricular Hypertrophy After Transcatheter Aortic Valve Implantation for Aortic Stenosis. Circ J 2021; 85:1093-1098. [PMID: 34039838 DOI: 10.1253/circj.cj-21-0354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND The changes in electrocardiographic left ventricular hypertrophy (ECG-LVH) after transcatheter aortic valve implantation (TAVI) are not fully elucidated.Methods and Results:The study group included 64 patients who underwent TAVI for aortic stenosis. Their 12-lead ECGs before and at 2 days and 1, 6 and 12 months after TAVI were analyzed, and ECG-LVH was evaluated using various definitions. Values and prevalence of each ECG-LVH parameter significantly decreased between 1 and 6 months after TAVI. Values of ECG-LVH parameters decreased especially in patients with ECG-LVH at baseline. CONCLUSIONS Regression of ECG-LVH was observed between 1 and 6 months after TAVI.
Collapse
Affiliation(s)
- Akihiro Tobe
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Akihito Tanaka
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Yoshiyuki Tokuda
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine
| | - Taro Fujii
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine
| | - Yusuke Miki
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Kenji Furusawa
- Department of Cardiology, Nagoya University Graduate School of Medicine
| | - Hideki Ishii
- Department of Cardiology, Nagoya University Graduate School of Medicine.,Department of Cardiology, Fujita Health University Bantane Hospital
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine
| |
Collapse
|
10
|
Tobe A, Tanaka A, Tokuda Y, Akita S, Miki Y, Furusawa K, Ishii H, Usui A, Murohara T. Serial Images of Aortic Plaque Rupture During Transfemoral Transcatheter Aortic Valve Replacement. JACC Cardiovasc Interv 2020; 13:e203-e204. [PMID: 33129816 DOI: 10.1016/j.jcin.2020.09.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 08/27/2020] [Accepted: 09/01/2020] [Indexed: 10/23/2022]
Affiliation(s)
- Akihiro Tobe
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Akihito Tanaka
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Yoshiyuki Tokuda
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Sho Akita
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Miki
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenji Furusawa
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideki Ishii
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan; Department of Cardiology, Fujita Health University Bantane Hospital, Nagoya, Japan
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| |
Collapse
|
11
|
Hattori TI, Yoshida R, Yoshida Y, Akita S, Kato W, Tajima K, Murohara T. A case of acute myocardial infarction caused by a giant thrombus derived from an aneurysm of the sinus of valsalva and a bioprosthetic aortic valve. J Echocardiogr 2020; 19:181-182. [PMID: 32166727 DOI: 10.1007/s12574-020-00464-y] [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] [Received: 11/19/2019] [Revised: 01/26/2020] [Accepted: 02/25/2020] [Indexed: 10/24/2022]
Affiliation(s)
- Tomok I Hattori
- Department of Cardiology, Japanese Red Cross Society Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, 466-8650, Japan
| | - Ruka Yoshida
- Department of Cardiology, Japanese Red Cross Society Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, 466-8650, Japan.,Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8560, Japan
| | - Yukihiko Yoshida
- Department of Cardiology, Japanese Red Cross Society Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, 466-8650, Japan.
| | - Sho Akita
- Department of Cardiac Surgery, Japanese Red Cross Society Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, 466-8650, Japan
| | - Wataru Kato
- Department of Cardiac Surgery, Japanese Red Cross Society Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, 466-8650, Japan
| | - Kazuyoshi Tajima
- Department of Cardiac Surgery, Japanese Red Cross Society Nagoya Daini Hospital, 2-9 Myoken-cho, Showa-ku, Nagoya, 466-8650, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8560, Japan
| |
Collapse
|
12
|
Ogawa R, Baidillah MR, Akita S, Takei M. Investigation of Physiological Swelling on Conductivity Distribution in Lower Leg Subcutaneous Tissue by Electrical Impedance Tomography. J Electr Bioimpedance 2020; 11:19-25. [PMID: 33584899 PMCID: PMC7531098 DOI: 10.2478/joeb-2020-0004] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Indexed: 06/12/2023]
Abstract
There is a strong need for a non-invasive measurement technique that is capable of accurately identifying the physiological condition change or heterogeneity of subcutaneous adipose tissue (SAT) by localizing the abnormalities within the compartment. This paper aims to investigate the feasibility of Electrical Impedance Tomography (EIT) to assess the interstitial fluid in subcutaneous adipose tissue as an enhancement method of bioelectrical impedance spectroscopy (BIS). Here, we demonstrate the preliminary result of EIT with a wearable 16 electrodes sensor. The image-based reference EIT with fat weighted threshold method is proposed. In order to evaluate the performance of our novel method, a physiological swelling experiment is conducted, and Multi-Frequency Bioelectrical Impedance Analysis (MFBIA) is also applied as a comparison with EIT results. The experimental results showed that the proposed method was able to distinguish the physiological swelling condition and effectively to remove the unexpected background noise. Furthermore, the conductivity variation in the subcutaneous layer had a good correlation with extracellular water volume change from MFBIA data; the correlation coefficient R2 = 0.927. It is concluded that the proposed method provides a significant prospect for SAT assessment.
Collapse
Affiliation(s)
- R. Ogawa
- Graduate School of Science & Eng., Dept. Mechanical Eng., Chiba University, Chiba, Japan
| | - M. R. Baidillah
- Graduate School of Science & Eng., Dept. Mechanical Eng., Chiba University, Chiba, Japan
| | - S. Akita
- Graduate School of Medicine, Dept. Reconstructive & Aesthetic Surgery, Chiba University, Chiba, Japan
| | - M. Takei
- Graduate School of Science & Eng., Dept. Mechanical Eng., Chiba University, Chiba, Japan
| |
Collapse
|
13
|
Akita S, Tajima K, Kato W, Tanaka K, Goto Y, Yamamoto R, Yazawa T, Kozakai M, Usui A. The long-term patency of a gastroepiploic artery bypass graft deployed in a semiskeletonized fashion: predictors of patency. Interact Cardiovasc Thorac Surg 2019; 28:868-875. [PMID: 30649384 DOI: 10.1093/icvts/ivy346] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Revised: 10/31/2018] [Accepted: 11/27/2018] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVES Whether or not using the gastroepiploic artery (GEA) is associated with improved outcomes of coronary artery bypass grafting (CABG) remains unclear. Previous research has shown that the short-term function of the GEA was strongly associated with the degree of native vessel stenosis. We assessed the association between long-term GEA patency and the degree of stenosis of the coronary artery. METHODS We retrospectively examined 517 patients who underwent CABG with an in situ semiskeletonized GEA from January 2000 to January 2015. In this cohort, 282 (54.5%) patients underwent distant radiological evaluations for >1 year post-surgery (range 1-18 years after surgery). Quantitative coronary angiography was used to measure the degree of stenosis of the native coronary artery. Preoperative angiographic parameters include the minimal lumen diameter (MLD) and the percentage of target vessel stenosis. A multivariable stepwise Cox proportional hazards regression analysis was used to identify predictors of angiographic occlusion. RESULTS The cumulative patency rate of the GEA was 79.3% at 10 years. A multivariable analysis showed that an MLD (hazard ratio 4.43, 95% confidence interval 3.25-6.82; P < 0.001) was an independent risk factor of GEA occlusion. A time-dependent receiver operating characteristic (ROC) curve analysis identified that an MLD >1 mm was set as the cut-off value for graft occlusion. Patients with an MLD <1 mm had a 10-year patency rate of 89.8%. CONCLUSIONS The long-term patency of the semiskeletonized GEA was acceptable. The target vessel MLD obtained using quantitative coronary angiography was a strong predictor of patency. Good long-term patency can be expected for an MLD <1 mm.
Collapse
Affiliation(s)
- Sho Akita
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan.,Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| | - Kazuyoshi Tajima
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Wataru Kato
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Keisuke Tanaka
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Yuki Goto
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Ryota Yamamoto
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Tubasa Yazawa
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Motoshi Kozakai
- Department of Cardiovascular Surgery, Nagoya Daini Redcross Hospital, Nagoya, Aichi, Japan
| | - Akihiko Usui
- Department of Cardiac Surgery, Nagoya University Graduate School of Medicine, Nagoya, Aichi, Japan
| |
Collapse
|
14
|
Tomizawa H, Suzuki K, Yamaguchi T, Akita S, Ishibashi K. Control of tunnel barriers in multi-wall carbon nanotubes using focused ion beam irradiation. Nanotechnology 2017; 28:165302. [PMID: 28273045 DOI: 10.1088/1361-6528/aa6568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We have formed tunnel barriers in individual multi-wall carbon nanotubes using the Ga focused ion beam irradiation. The barrier height was estimated by the temperature dependence of the current (Arrhenius plot) and the current-voltage curves (Fowler-Nordheim plot). It is shown that the barrier height has a strong correlation with the barrier resistance that is controlled by the dose. Possible origins for the variation in observed barrier characteristics are discussed. Finally, the single electron transistor with two barriers is demonstrated.
Collapse
Affiliation(s)
- H Tomizawa
- Advanced Device Laboratory, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. Department of Applied Physics, Tokyo University of Science, 6-3-1 Niijuku, Katsushika, Tokyo 125-8585, Japan
| | | | | | | | | |
Collapse
|
15
|
Tao W, Akita S, Nakano R, Ito S, Hoshimoto Y, Ogoshi S, Nozaki K. Copolymerisation of ethylene with polar monomers by using palladium catalysts bearing an N-heterocyclic carbene–phosphine oxide bidentate ligand. Chem Commun (Camb) 2017; 53:2630-2633. [DOI: 10.1039/c7cc00002b] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report the synthesis and characterisation of palladium complexes bearing an N-heterocyclic carbene–phosphine oxide bidentate ligand and their use as catalysts for ethylene polymerisation and ethylene/polar monomer copolymerisation.
Collapse
Affiliation(s)
- W. Tao
- Department of Chemistry and Biotechnology
- Graduate School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - S. Akita
- Department of Chemistry and Biotechnology
- Graduate School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - R. Nakano
- Department of Chemistry and Biotechnology
- Graduate School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - S. Ito
- Department of Chemistry and Biotechnology
- Graduate School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| | - Y. Hoshimoto
- Department of Applied Chemistry
- Faculty of Engineering
- Osaka University
- Suita
- Japan
| | - S. Ogoshi
- Department of Applied Chemistry
- Faculty of Engineering
- Osaka University
- Suita
- Japan
| | - K. Nozaki
- Department of Chemistry and Biotechnology
- Graduate School of Engineering
- The University of Tokyo
- Tokyo 113-8656
- Japan
| |
Collapse
|
16
|
Uchida K, Io A, Akita S, Munakata H, Hibino M, Fujii K, Kato W, Sakai Y, Tajima K, Mizobata Y. Recent risk factors for open surgical mortality in patients with ruptured abdominal aortic aneurysm. Acute Med Surg 2014; 1:207-213. [PMID: 29930850 DOI: 10.1002/ams2.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Accepted: 02/24/2014] [Indexed: 11/06/2022] Open
Abstract
Aim We examined recent relevant prognostic factors for the outcome of open surgical treatment of ruptured abdominal aortic aneurysm. Methods Between 2006 and 2012, 35 patients received emergency open surgical treatment for ruptured abdominal aortic aneurysm at our institute. We reviewed ambulance activity logs and clinical records of 34 infrarenal ruptured abdominal aortic aneurysm patients retrospectively. Univariate and multivariate logistic regression analyses were carried out to identify risk factors for surgical outcomes. Results Eight patients died during surgery or within a few hours following surgery completion. Through univariate analysis, body mass index, serum lactate level, arterial blood pH, base excess, platelet count, prothrombin time-international normalized ratio, activated partial thromboplastin time, type of ruptured aneurysm, response to i.v. fluid resuscitation within 2,000 mL in the initial therapy, and volume of blood loss during surgery were detected to be significant variants. Multivariate logistic regression analysis revealed the patients who were hemodynamically stabilized after primary volume loading had a 13.2 times higher possibility of survival. Body mass index, high serum lactate level, and volume of blood loss were also found to be independent risk factors of mortality. Conclusion The risk factors of open surgical ruptured abdominal aortic aneurysm repair, body mass index, lactate level, volume of intraoperative blood loss, and response to initial 2,000 mL fluid resuscitation were correlated to survival.
Collapse
Affiliation(s)
- Kenichiro Uchida
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Akinori Io
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Sho Akita
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Hisaaki Munakata
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Makoto Hibino
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Kei Fujii
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Wataru Kato
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Yoshimasa Sakai
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Kazuyoshi Tajima
- Department of Cardiovascular Surgery Nagoya Daini Redcross Hospital Nagoya Japan
| | - Yasumitsu Mizobata
- Department of Traumatology, and Critical Care Medicine Graduate School of Medicine Osaka City University Osaka Japan
| |
Collapse
|
17
|
Nakano K, Akita S, Yamanaka M. Fabrication of superhydrophobic surfaces from mixtures of aluminum distearate and fatty acids via intermediate organogel formation. Colloid Polym Sci 2014. [DOI: 10.1007/s00396-014-3219-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Hashimoto J, Hirao M, Shi K, Ebina K, Kaneshiro S, Nampei A, Tsuboi H, Akita S, Ohshima S, Saeki Y, Yoshikawa H. AB0127 Serum sclerostin and DKK-1 in patients with rheumatoid arthritis. Ann Rheum Dis 2014. [DOI: 10.1136/annrheumdis-2012-eular.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
|
19
|
Akita S, Takei H, Matsubayashi F, Asai H, Kamikubo Y, Nakamura S, Sakata K, Nakayama Y, Maruyama K, Hayakawa K. Establishment of an Easy-to-Handle Quality Assurance (QA) Tool Using Plastic Scintillator for Dynamic Parameters of VMAT. Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.392] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
20
|
Hirao M, Tsuboi H, Akita S, Matsushita M, Ohshima S, Saeki Y, Hashimoto J. SAT0056 Radiographic Relationship between Hallux Valgus Deformity and Fore-Mid-Hindfoot Deformity in Rheumatoid Arthritis: Evaluation Grouped by the Existence of 2ND MTP Joint Dorsal Dislocation. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1782] [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: 11/03/2022]
|
21
|
Hirao M, Tsuboi H, Akita S, Ebina K, Matsushita M, Ohshima S, Saeki Y, Nishimoto N, Hashimoto J. SAT0113 Intense Repression of Serum Oxidative Stress Marker in Rheumatoid Arthritis Cases Treated with Tocilizumab: Cross Sectional and Longitudinal Evaluation. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2013-eular.1839] [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: 11/04/2022]
|
22
|
Akita S, Tsuboi H, Hirao M, Hashimoto J, Saeki Y, Yonenobu K. AB1383 Mid-term results of unlinked elbow arthroplasty for stiff elbows with rheumatoid arthritis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.1376] [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: 11/04/2022]
|
23
|
Tsuboi H, Akita S, Fujita S, Hirao M, Saeki Y, Hashimoto J. SAT0092 Ultrasonography of inflamed joints in patients with rheumatoid arthritis; comparison with histopathological analysis. Ann Rheum Dis 2013. [DOI: 10.1136/annrheumdis-2012-eular.3039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
24
|
Nakamura S, Asai H, Akita S, Aoyama Y, Kamikubo Y, Sugama Y, Takei H, Nishio T, Maruyama K, Hayakawa K. Development of Fast and High-spatial-resolution 3-dimensional Dosimetry Equipment for Both the Narrow Beam and the Broad Beam in Proton Therapy. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
25
|
Kamikubo Y, Takaki R, Asai H, Akita S, Yokosawa J, Nakamura S, Takei H, Maruyama K, Hayakawa K. A New Clinical Dose-Measuring Tool for Electron Beam Therapy Using Plastic Scintillator. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.2248] [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]
|
26
|
Akita S, Yoshimoto H, Ohtsuru A, Hirano A, Yamashita S. Autologous adipose-derived regenerative cells are effective for chronic intractable radiation injuries. Radiat Prot Dosimetry 2012; 151:656-660. [PMID: 22914335 DOI: 10.1093/rpd/ncs176] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Effective therapy for chronic radiation injuries, such as ulcers, is prone to infection. Stiffness is expected since the therapeutic radiation often involves wider and deeper tissues and often requires extensive debridement and reconstruction, which are not sometimes appropriate for elderly and compromised hosts. Autologous adipose-derived regenerative cells (ADRCs) are highly yielding, forming relatively elderly aged consecutive 10 cases, 63.6±14.9 y (52-89 y), with mean radiation dose of 75.0±35.4 Gy (50-120 Gy) were included with at least 10-month follow-up. Minimal debridement and ADRC injection in the wound bed and margin along with the injection of mixture of fat and ADRCs in the periphery were tested for efficacy and regenerated tissue quality by clinically as well as imaging by computed tomography and magnetic resonance imaging. Uncultured ADRCs of 1.6±1.3×10(7) cells were obtained. All cases healed uneventfully after 6.6±3.2 weeks (2-10 weeks) post-operatively. The done site morbidity was negligible and without major complications, such as paralysis or massive haematoma. The regenerated tissue quality was significantly superior to the pre-operative one and the mixture of fat and ADRCs connected to the intact tissue was very soft and pliable. Mean follow-up at 1.9±0.8 y (0.9-2.9 y) revealed no recurrence or new ulceration after treatment. Thus, the ADRCs treatment for decades-long radiation injuries is effective, safe and improves the quality of wounds.
Collapse
Affiliation(s)
- S Akita
- Division of Plastic and Reconstructive Surgery, Department of Developmental and Reconstructive Medicine, Nagasaki University, Graduate School of Biomedical and Sciences, Nagasaki, Japan.
| | | | | | | | | |
Collapse
|
27
|
Asai H, Watanabe T, Takenaka S, Akita S, Kamikubo Y, Oomori K, Takei H, Hayakawa K, Saitou H, Maruyama K. A New Method For Real-time Confirmation Of Information From The Irradiation Area Of X-ray Therapy. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1205] [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]
|
28
|
Akita S, Asai H, Tomori S, Kamikubo Y, Yokozawa J, Matsubayashi F, Takahashi T, Takei H, Hayakawa K, Maruyama K. Development Of A New Quality Assurance (QA) Tool For VMAT Using A Plastic Scintillator. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1575] [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]
|
29
|
Nii S, Okumura S, Kinoshita T, Ishigaki Y, Nakano K, Yamaguchi K, Akita S. Extractant-impregnated organogel for capturing heavy metals from aqueous solutions. Sep Purif Technol 2010. [DOI: 10.1016/j.seppur.2010.04.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
30
|
Imoto S, Kawamura K, Tokumine Y, Araki N, Akita S, Nishimura C, Inaba H, Saigo K, Mabuchi O, Okazaki H. Acute non-hemolytic transfusion reactions and HLA class I antibody: advantages of solid phase assay compared with conventional complement-dependent assay. Transfus Med 2009; 20:95-103. [PMID: 19883399 PMCID: PMC2860765 DOI: 10.1111/j.1365-3148.2009.00972.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
To evaluate the specific reactivity of HLA Class I antibodies (HLA-I Abs) in acute non-hemolytic transfusion reactions (ANHTRs) using solid phase assays (SPAs) and conventional complement-dependent lymphocyte cytotoxicity test (LCT). ANHTRs are major issues in transfusion medicine. Anti-leukocyte antibodies have been implicated as one of the causative agents of transfusion-related acute lung injury (TRALI) and febrile reaction. Antibodies to HLA Class I and/or Class II (HLA Abs) have been intensively studied using SPAs for TRALI, but not for febrile reaction. About 107 patients and 186 donors associated with ANHTRs were screened for HLA Abs by SPAs such as enzyme-linked immunosorbent assay (ELISA) and the Luminex method. When HLA-I Ab was detected, its specific reactivity was evaluated by comparing its specificity identified by the Luminex method using recombinant HLA molecules and cognate HLA antigens (Ags), as well as LCT with or without anti-human globulin (AHG). The incidences of HLA Abs were as high as 32·7% of patients' serum samples and 16% of donors' serum samples. The incidence of HLA-I Abs did not differ significantly between cases of febrile and allergic reactions. However, HLA-I Abs associated with febrile reaction showed a significantly higher rate of possessing specific reactivity to cognate HLA Ags than those associated with allergic reactions. In addition, the Luminex method enabled the detection of HLA-I Abs much earlier than AHG-LCT in serum samples from a patient with febrile reaction and platelet transfusion refractoriness (PTR). SPAs seem more useful than AHG-LCT for evaluating reactivity of antibodies in ANHTR cases.
Collapse
Affiliation(s)
- S Imoto
- Japanese Red Cross Hyogo Blood Center, Kobe, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Akino K, Mineta T, Fukui M, Akita S. P-II-04
Early Phase Regulation of Human Mesenchymal Stem Cells and the Unique Profile of the Proliferation by Bone Morphogenetic Protein-2. Wound Repair Regen 2008. [DOI: 10.1111/j.1067-1927.2004.abstractt.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Kinoshita T, Akita S, Ishigaki Y, Yamaguchi K, Yamada Y, Nii S, Kawaizumi F, Takahashi K. Continuous Foam Separation of Metals Enhanced by Down-Flowing Surfactant Solution from Column Top. Chem Eng Res Des 2007. [DOI: 10.1205/cherd06057] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
33
|
Abstract
A total of 11 patients with combined traumatic injuries of the brachial plexus and spinal cord were reviewed retrospectively. Brachial plexus paralysis in such dual injuries tends to be diagnosed and treated late and the prognosis is usually poor. The associated injuries, which were all on the same side as the plexus lesion, were to the head (nine cases), shoulder girdle (five), thorax (nine) and upper limb (seven). These other injuries were responsible for the delayed diagnosis of brachial plexus paralysis and the poor prognosis was probably because of the delay in starting treatment and the severity of the associated injuries. When such injuries are detected in patients with spinal cord trauma, it is important to consider the possibility of involvement of the brachial plexus.
Collapse
Affiliation(s)
- S Akita
- Department of Orthopaedic Surgery, Hoshigaoka Koseinenkin Hospital, 4-8-1 Hoshigaoka Hospital, Osaka 573-8511, Japan.
| | | | | |
Collapse
|
34
|
Abstract
BACKGROUND Large or deteriorated skin defects are sometimes life threatening. There is increasing evidence that adult stem cells are useful for tissue regeneration. Human mesenchymal stem cells (hMSCs) are self-renewing and are potent in differentiating into multiple cells and tissues. OBJECTIVES To investigate the effects of hMSCs in cutaneous wound healing. METHODS Wound healing was studied in an hMSC-populated porcine skin substitute, using a nude rat model to minimize immune reactions. Full-thickness skin and soft tissue defects of 1.5 x 1.5 cm in size, including the panniculus carnosus, were excised and covered with hMSCs and basic fibroblast growth factor (bFGF)-soaked skin substitutes and an evaluation was made of wound size, histology and protein expression at 3, 7 and 42 days after injury. RESULTS The wound size was significantly smaller in the hMSC-treated groups (P < 0.01) and any dose of bFGF (1, 10, 100 microg) enhanced the healing (P < 0.01). The re-epithelialization markers integrin alpha3 and skin-derived antileucoproteinase were remarkably increased with the presence of bFGF in a dose-dependent manner, while the mesenchymal cell surface markers CD29 and CD44 were downregulated in a time-dependent manner. Human pancytokeratin, which does not cross-react with rat antigens, was observed by Western blotting at 38 kDa and 42 kDa from the hMSC-treated tissues on day 7. The expression levels were elevated by 10 microg bFGF (P < 0.01). The immunohistochemical expression of human pancytokeratin was only observed in the hMSC-treated groups. CONCLUSIONS These data suggest that hMSCs together with bFGF in a skin defect model accelerate cutaneous wound healing as the hMSCs transdifferentiate into the epithelium.
Collapse
Affiliation(s)
- H Nakagawa
- Division of Plastic and Reconstructive Surgery, Department of Developmental and Reconstructive Medicine, Nagasaki University, Graduate School of Medical and Dental Sciences, 1-7-1 Sakamoto, Nagasaki 8528501, Japan
| | | | | | | | | |
Collapse
|
35
|
Kinoshita T, Yamaguchi K, Akita S, Nii S, Kawaizumi F, Takahashi K. Hydrometallurgical recovery of zinc from ashes of automobile tire wastes. Chemosphere 2005; 59:1105-1111. [PMID: 15833484 DOI: 10.1016/j.chemosphere.2004.12.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2004] [Revised: 12/08/2004] [Accepted: 12/08/2004] [Indexed: 05/24/2023]
Abstract
Study has been performed on the investigation of metal leaching behavior for fly and bottom ashes from automobile tire wastes using acid and alkaline solutions from both viewpoints of environmental protection and resource utilization. The two ashes were found to contain substantial amounts of zinc and iron along with small quantities of cobalt, manganese, magnesium, copper, titanium and aluminum. The fly ash contained a much larger amount of zinc than the bottom ash, and seems to be a promising secondary source for the metal. Effects of such experimental parameters as temperature, time and solid-liquid ratio on the leaching behavior were investigated. Using three mineral acids and citric acid, selective leaching of zinc was successfully attained; the concentration of zinc in the leach liquors from the fly ash reached as high as 20 g l(-1) while the iron leaching was much suppressed. Selective separation of zinc was also attained in the leaching with alkaline solutions, though the percent leaching was lower than that in the acid leaching. Moreover, solvent extraction and precipitation were applied to the metal-loaded leach liquors as downstream processing to evaluate the feasibility of zinc recovery.
Collapse
Affiliation(s)
- T Kinoshita
- Material Technology Department, Nagoya Municipal Industrial Research Institute, 3-4-41 Rokuban, Nagoya, Aichi 456-0058, Japan.
| | | | | | | | | | | |
Collapse
|
36
|
Nakagawa H, Akino K, Akita S. Skin Regeneration by Human Mesenchymal Stem Cells and Basic Fibroblast Growth Factor. Wound Repair Regen 2005. [DOI: 10.1111/j.1067-1927.2005.130116ag.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
37
|
Akino K, Mineta T, Nakagawa H, Akita S. Interaction Between Human Mesenchymal Stem Cells and Basic Fibroblast Growth Factor or Other Cell Types. Wound Repair Regen 2005. [DOI: 10.1111/j.1067-1927.2005.130116ak.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
38
|
Fukui M, Akita S, Akino K. S-IV-03
Ectopic Bone Formation Accelerated by Human Mesenchymal Stem Cells and Osteogenic Cytokines via Nutrient Vessel Injection in Nude Rat. Wound Repair Regen 2004. [DOI: 10.1111/j.1067-1927.2004.abstractk.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
39
|
Akita S, Akino K, Fukui M. P-II-02
Leukemia Inhibitory Factor Gene and Vascular Endothelial Growth Factor Protein can Module Embryonic Fibroblastic Differentiation via GP130-STAT and MAPK Signal Transduction Pathways. Wound Repair Regen 2004. [DOI: 10.1111/j.1067-1927.2004.abstractr.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
40
|
Akita S, Einaga Y, Miyaki Y, Fujita H. Solution Properties of Poly(D-β-hydroxybutyrate). 1. Biosynthesis and Characterization. Macromolecules 2002. [DOI: 10.1021/ma60053a017] [Citation(s) in RCA: 130] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
41
|
Ohte N, Narita H, Akita S, Kurokawa K, Hayano J, Kimura G. Striking effect of left ventricular high filling pressure with mitral regurgitation on mitral annular velocity during early diastole. A study using colour M-mode tissue Doppler imaging. Eur J Echocardiogr 2002; 3:52-8. [PMID: 12067535 DOI: 10.1053/euje.2001.0116] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
AIMS To evaluate the effect of considerably high left ventricular filling pressure with mitral regurgitation on mitral annular velocity during early diastole. SUBJECTS Two hundred and forty-three patients who underwent cardiac catheterization for evaluation of chest pain. METHODS Mitral annular velocity during early diastole was measured by colour M-mode tissue Doppler imaging. Patients were divided into the following three groups according to the cardiac catheterization data. Group A (n=147): patients having left ventricular relaxation time constant tau<46 ms and left ventricular end-systolic volume index <38 ml m(-2); group B (n=88): patients having tau>or=46 ms and/or end-systolic volume index >or=38 ml m(-2); group C (n=8): patients having mean pulmonary capillary wedge pressure >or=16 mmHg in addition to tau>or=46 ms and end-systolic volume index >or=38 ml m(-2). RESULTS Mitral annular velocity during early diastole was significantly less in group B (4.8+/-1.4 cm s(-1)) than in group A (7.7+/-1.9 cm s(-1)). However, there was no significant difference between groups A and C (8.3+/-0.8 cm s(-1)). A transmitral E/A >1.0 was observed in 12/147 patients of group A, 10/88 of group B, and 8/8 of group C. The incidence of >or=Sellers' grade II mitral regurgitation was higher in group C than the others. CONCLUSIONS A paradoxically faster mitral annular velocity during early diastole is found in patients having left ventricular dysfunction with moderate to severe mitral regurgitation and considerably high left ventricular filling pressure. Attention should be paid to an interpretation of mitral annular velocity during early diastole regarding left ventricular early diastolic performance in patients having mitral regurgitation with an E/A >1.0 in their transmitral flow.
Collapse
Affiliation(s)
- N Ohte
- Third Department of Internal Medicine, Nagoya City University Medical School, Nagoya, Japan.
| | | | | | | | | | | |
Collapse
|
42
|
Ohte N, Narita H, Akita S, Kurokawa K, Hayano J, Kimura G. Striking effect of left ventricular systolic performance on propagation velocity of left ventricular early diastolic filling flow. J Am Soc Echocardiogr 2001; 14:1070-4. [PMID: 11696830 DOI: 10.1067/mje.2001.114136] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [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: 11/22/2022]
Abstract
Propagation velocity of left ventricular (LV) early diastolic filling flow (PVE) has been acknowledged as a useful parameter for LV early diastolic performance; however, the effect of LV systolic performance on PVE is not fully understood. Thus the purpose of this study was to investigate such an effect. Propagation of LV early diastolic filling flow was visualized by M-mode color Doppler imaging, and the slopes of the peak velocity tracings were measured as PVE in 150 patients who underwent coronary angiography. In cardiac catheterization, mean pulmonary capillary wedge pressure, time constant tau of LV pressure decay, LV end-systolic volume index, and LV ejection fraction were obtained. In univariate regression analysis, PVE significantly correlated with LV end-systolic volume index (r = -0.68, P <.001), LV ejection fraction (r = 0.66, P <.001), and time constant tau (r = -0.52, P <.001). In multivariate regression analysis, PVE was regressed by the LV end-systolic volume index, tau, and mean pulmonary capillary wedge pressure. The contribution of each parameter to the variance of the PVE was 46%, 3%, and 2%, respectively. A break-point linear regression analysis showed that the relation between the LV end-systolic volume index and PVE was much better characterized by a broken line than a straight line. The broken line had a steeper slope in patients with LV end-systolic volume index < or =41 mL/m(2) than in those with >41 mL/m(2). These findings suggest that PVE is determined mainly by LV systolic performance and partly by both LV relaxation and LV filling pressure. Left ventricular systolic performance may play a key role in generating a much faster PVE, especially in patients with relatively better LV systolic performance.
Collapse
Affiliation(s)
- N Ohte
- Third Department of Internal Medicine, Nagoya City University Medical School, 1 Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya 467-8601, Japan.
| | | | | | | | | | | |
Collapse
|
43
|
Saito T, Akita S, Torii T, Hiraide M. Selective concentration of gold in water to a polystyrene-embedded fiber disk with polyoxyethylene(10)-p-isononylphenyl ether. J Chromatogr A 2001; 932:159-63. [PMID: 11695862 DOI: 10.1016/s0021-9673(01)01251-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/17/2022]
Abstract
A new surfactant-mediated separation method was developed for concentrating traces of gold ion in water. The methodology is based on the combination of selective complexation of gold(III) with polyoxyethylene(10)-p-isononylphenyl ether, PONPE-10, and strong binding of surfactant complex to hydrophobic polystyrene resins embedded in a PTFE fiber disk (Empore disk). A 400-fold concentration of gold(III) was achieved by 400 ml load of the sample containing 0.01% (w/v) PONPE-10 and 0.10 M nitric acid and by the subsequent elution with 1.0 ml of aqueous buffer solution of 0.01 M N-(dithiocarboxyl)sarcosine diammonium. Traces of gold (0.40 ng/l) in river water samples were successfully determined with inductively coupled plasma MS.
Collapse
Affiliation(s)
- T Saito
- Department of Molecular Design and Engineering, Nagoya University, Chikusa, Japan.
| | | | | | | |
Collapse
|
44
|
Urano T, Ihara H, Umemura K, Suzuki Y, Oike M, Akita S, Tsukamoto Y, Suzuki I, Takada A. The profibrinolytic enzyme subtilisin NAT purified from Bacillus subtilis Cleaves and inactivates plasminogen activator inhibitor type 1. J Biol Chem 2001; 276:24690-6. [PMID: 11325965 DOI: 10.1074/jbc.m101751200] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In this report, we demonstrate an interaction between subtilisin NAT (formerly designated BSP, or nattokinase), a profibrinolytic serine proteinase from Bacillus subtilis, and plasminogen activator inhibitor 1 (PAI-1). Subtilisin NAT was purified to homogeneity (molecular mass, 27.7 kDa) from a saline extract of B. subtilis (natto). Subtilisin NAT appeared to cleave active recombinant prokaryotic PAI-1 (rpPAI-1) into low molecular weight fragments. Matrix-assisted laser desorption/ionization in combination with time-of-flight mass spectroscopy and peptide sequence analysis revealed that rpPAI-1 was cleaved at its reactive site (P1-P1': Arg(346)-Met(347)). rpPAI-1 lost its specific activity after subtilisin NAT treatment in a dose-dependent manner (0.02-1.0 nm; half-maximal effect at approximately 0.1 nm). Subtilisin NAT dose dependently (0.06-1 nm) enhanced tissue-type plasminogen activator-induced fibrin clot lysis both in the absence of rpPAI-1 (48 +/- 1.4% at 1 nm) and especially in the presence of rpPAI-1 (78 +/- 2.0% at 1 nm). The enhancement observed in the absence of PAI-1 seems to be induced through direct fibrin dissolution by subtilisin NAT. The stronger enhancement by subtilisin NAT of rpPAI-1-enriched fibrin clot lysis seems to involve the cleavage and inactivation of active rpPAI-1. This mechanism is suggested to be important for subtilisin NAT to potentiate fibrinolysis.
Collapse
Affiliation(s)
- T Urano
- Department of Physiology, Hamamatsu University School of Medicine, 3600, Handa-cho, Hamamatsu, 431-3192, Japan.
| | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Saish D, Nakazono M, Lee KH, Tsutsumi N, Akita S, Hirai A. The gene for alternative oxidase-2 (AOX2) from Arabidopsis thaliana consists of five exons unlike other AOX genes and is transcribed at an early stage during germination. Genes Genet Syst 2001; 76:89-97. [PMID: 11434463 DOI: 10.1266/ggs.76.89] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
We investigated the expressions of genes for alternative oxidase (AOX1a, AOX1b, AOX1c and AOX2) and genes for cytochrome c oxidase (COX5b and COX6b) during germination of Arabidopsis thaliana, and examined oxygen uptakes of the alternative respiration and the cytochrome respiration in imbibed Arabidopsis seeds. A Northern blot analysis showed that AOX2 mRNA has already accumulated in dry seeds and subsequently decreased, whereas accumulation ofAOX1a mRNA was less abundant from 0 hours to 48 hours after imbibition and then increased. The increase of the capacity of the alternative pathway appeared to be dependent on the expressions of both AOX2 and AOX1a. On the other hand, steady-state mRNA levels of COX5b and COX6b were gradually increased during germination, and the capacity of the cytochrome pathway was correlated with the increase of expressions of the COX genes. Antimycin A, the respiratory inhibitor, strongly increased the expression of AOX1a but had no effect on the expression of AOX2. A 5'RACE analysis showed that AOX2 consists of five exons, which is different from the case of most AOX genes identified so far. Analysis of subcellular localization of AOX2 using green fluorescent protein indicated that the AOX2 protein is imported into the mitochondria.
Collapse
Affiliation(s)
- D Saish
- Laboratory of Plant Molecular Genetics, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
| | | | | | | | | | | |
Collapse
|
46
|
Mizuno M, Okayama N, Kasugai K, Yoshida T, Miyata M, Nitta M, Kataoka H, Akita S, Joh T, Itoh M, Asai K, Kato T. Acid stimulates E-cadherin surface expression on gastric epithelial cells to stabilize barrier functions via influx of calcium. Eur J Gastroenterol Hepatol 2001; 13:127-36. [PMID: 11246611 DOI: 10.1097/00042737-200102000-00007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
BACKGROUND AND AIMS E-cadherin, which is a [Ca2+]-dependent, homotypic cell-cell adhesion molecule, is expressed in gastrointestinal epithelial cells. Much has been learned about the down-regulation of E-cadherin expression in gastrointestinal tumours, Barrett's oesophageal dysplasia, and Crohn's disease, but the functions of this molecule in normal gastrointestinal mucosa are less known. METHODS In this study, we investigated the relationship between E-cadherin expression and permeability using rat cultured gastric and intestinal epithelial cells following a 30-min exposure to various pH solutions. We also investigated the participation of [Ca2+] in these events. RESULTS E-cadherin expression increased under acid (pH 4) but not alkali (pH 10 or 11) exposure only for gastric epithelial cells. Gastric epithelial permeability was maintained only against acid exposure while intestinal permeability increased under both conditions. Transient influx of [Ca2+] was only observed for gastric epithelial cells just after acid exposure. CONCLUSIONS These findings suggest that E-cadherin expression on gastric epithelium stabilizes the epithelial barrier against acid, probably through influx of [Ca2+]. This event is thought to be one of the protective mechanisms in gastric mucosa against acid back-diffusion, which is one of the causes of peptic ulcer formation.
Collapse
Affiliation(s)
- M Mizuno
- Second Department of Internal Medicine, Aichi Medical University, Japan.
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
47
|
Abstract
For bone defect reconstruction, locally administered cytokine plasmid was examined. Leukemia inhibitory factor (LIF) can bind to the osteoblast cell surface and induce bone formation both in vitro and in vivo. The authors investigated the local mouse LIF complementary deoxyribonucleic acid (cDNA) plasmid in the pcDNA 3 expression vector, which is promoted by cytomegalovirus and is stabilized by bovine growth hormone polyadenylation, with a gelatin sponge carrier. A total of 150 male Wistar rats were used. They were divided into three groups. Group 1 (N = 30) was treated with the gelatin carrier of the pcDNA 3 vector, group 2 (N = 90) was treated with three different doses of LIF cDNA (0.1, 1, and 10 micrograms) in the pcDNA 3-vector plasmid along with the gelatin carrier, and group 3 (N = 30) was treated with recombinant human bone morphogenetic protein -2. Ten animals in each group were euthanized at 1, 3, and 5 weeks postoperatively. Animals treated with LIF cDNA showed significantly enhanced bone mineral density (p < 0.05), as confirmed by dual-energy X-ray absorptiometry (DEXA), in 3 weeks compared with the control vehicle. By 3 weeks, the number of fibroblast-like cells and collagen fibers decreased, whereas the osteoblast-like cells increased inversely, as revealed during histological examination. LIF messenger ribonucleic acid demonstrated by in situ hybridization was observed most markedly in osteocytes of the LIF cDNA-treated group. Also, LIF peptide was detected in the same cell type by immunohistochemistry. Locally administered LIF cDNA plasmid in a gelatin carrier can increase bone density significantly, with subsequent bone formation, probably via osteocyte activation.
Collapse
Affiliation(s)
- S Dazai
- Department of Plastic and Reconstructive Surgery, Atomic Disease Institute, Nagasaki University School of Medicine, Japan
| | | | | | | | | | | | | |
Collapse
|
48
|
Horigome H, Nomura T, Saso K, Joh T, Ohara H, Akita S, Sobue S, Mizuno Y, Kato Y, Kanematsu T, Murasaki G, Itoh M. Diagnosis of small hepatocellular carcinoma--imaging diagnosis and significance of tumor biopsy. Hepatogastroenterology 2000; 47:1659-62. [PMID: 11149027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
BACKGROUND/AIMS To compare the effectiveness of different imaging modalities and the significance of tumor biopsy for diagnosing small hepatocellular carcinoma. METHODOLOGY Nodules (n = 352) with diameters of 30 mm or less newly detected by periodic ultrasonography and computed tomography in 234 patients with chronic liver disease were investigated with magnetic resonance imaging and digital subtraction angiography. These findings were compared with histologic findings. Histologic diagnoses were dysplastic nodule (n = 23), well-differentiated hepatocellular carcinoma (n = 163), moderately differentiated hepatocellular carcinoma (n = 159), and poorly differentiated hepatocellular carcinoma (n = 7). We compared three groups based on-diameters of 10, 11-20, and 21-30 mm. Nodules were diagnosed as hepatocellular carcinoma if they had hypervascular staining on digital subtraction angiography, hyperintensity on magnetic resonance T2-weighted images, arterial phase enhancement on enhanced magnetic resonance imaging, or low-high-low density on enhanced computed tomography. RESULTS Imaging alone was sufficient to diagnose hepatocellular carcinoma in 66.3% of the well-differentiated nodules and 91.6% of the moderately and poorly differentiated nodules (P < 0.001) The size of the nodule influenced the diagnosis of hepatocellular carcinoma by imaging alone in 65.5% (< or = 10 mm), 77.2% (11-20 mm), and 92.3% (21-30 mm) (< or = 10 vs. 21-30: P < 0.0001, 11-20 vs. 21-30: P < 0.0005). It was impossible to determine the degree of differentiation of the hepatocellular carcinoma by imaging alone. CONCLUSIONS The effectiveness of imaging for the diagnosis of hepatocellular carcinoma improved with decreasing differentiation and increasing diameter of the nodules. Tumor biopsy was required to make a histological accurate diagnosis.
Collapse
Affiliation(s)
- H Horigome
- First Department of Internal Medicine, Nagoya City University Medical School, 1-Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya City, Japan 467-8601
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Abstract
BACKGROUND Leukemia inhibitory factor (LIF) is a widely expressed cytokine involved in both local and systemic immune response. Furthermore, it has been implicated in various immunological processes including thymic T cell maturation and embryo implantation. We investigated implication of various modalities in the application of prolonged and viable allograft to the wound, using cytokines and growth factors. MATERIALS BALB/c and B6D2F1 strains of mice were used either as a skin graft donor or host. LIF cDNA inserted in plasmid vector or the vector alone was injected intradermally in graft skin and observed up to 21 days. LIF, LIF-receptor, gp130, as well as type 1 and 2 T helper cytokine expressions were investigated by reverse transcription polymerasse chain reaction, in situ hybridization, and histological studies. RESULTS LIF cDNA-treated groups showed significantly improved graft survival compared to the vector-treated control in 21 days postoperatively for grafting from B6D2F1 to BALB/c and BALB/c to B6D2F1. LIF and LIF receptor mRNA expressions were observed 24 hr and 21 days posttransplantation. The gp130 expression was only observed in LIF-treated B6D2F1 to BALB/c allografting on day 21 posttransplantation. LIF transcripts were strongly present in the epidermal, dermal, and subdermal tissues as determined by an in situ hybridization of LIF-treated grafting. CONCLUSIONS These results suggest that LIF cDNA treatment is an effective and beneficial adjuvant for the skin allograft survival. Improved skin allograft modulation by cytokine gene transfer is a potentially promising therapy for temporary large skin coverage.
Collapse
Affiliation(s)
- S Akita
- Department of Plastic and Reconstructive Surgery, Nagasaki University, School of Medicine, Japan
| | | | | | | |
Collapse
|
50
|
Abstract
Rice is the only cereal in which germination and coleoptile elongation occur in hypoxia or anoxia. Little is known of the molecular basis directly underlying coleoptile cell extension. In this paper, we describe the expression of alpha-expansin genes in embryos during seed development and young seedlings grown under various oxygen concentrations. The genes Os-EXP2 and Os-EXP1 were predominantly expressed in the developing seeds, mainly in newly developed leaves, coleoptiles, and seminal roots. These expansins expressed in the developing seeds may give cells the potential to expand after seed imbibition begins. In coleoptiles, Os-EXP4 and Os-EXP2 mRNAs were greatly induced by submergence, while they were weakly detected in aerobic or anoxic conditions. Under submerged soil conditions, the signals hybridized with probes Os-EXP4 and Os-EXP2 in coleoptiles were strongest when coleoptiles elongated in the water layer. These data show that expansin gene expression is highly correlated with coleoptile elongation in response to oxygen concentrations. The Os-EXP4 gene was also expressed in leaves, mesocotyls, and coleorhizas of young seedlings. The growth of these tissues was also correlated with the presence of expansins. Therefore, the evidence derived from this study clearly demonstrates that expansins are indispensable for the growing tissues of rice seedlings.
Collapse
Affiliation(s)
- J Huang
- Department of Agricultural and Environmental Biology, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Japan
| | | | | |
Collapse
|