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Kiuchi Y, Tsutsumimoto K, Nishimoto K, Misu Y, Ohata T, Makizako H, Shimada H. Association between dietary diversity and chronic kidney disease in community-dwelling older adults. Eur Geriatr Med 2024; 15:545-552. [PMID: 38281299 DOI: 10.1007/s41999-023-00927-2] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Accepted: 12/19/2023] [Indexed: 01/30/2024]
Abstract
OBJECTIVE The present study examined whether dietary diversity is associated with chronic kidney disease (CKD) in community-dwelling older Japanese adults. METHODS Participants comprised 8,195 older adults (mean age was 74.0 ± 5.6 years; 42.7% were men) in this cross-sectional study. In this study, CKD was defined as estimated Glomerular Filtration Rate (eGFR) < 45 mL/min/1.73 m2. Diet variety was assessed using the Food Frequency Score (FFS) (maximum, 30 points). The FFS assessed the one-week consumption frequency of ten foods (meat, fish/shellfish, eggs, milk, soybean products, green & yellow vegetables, potatoes, fruits, seafood, and fats & oil). Participants with an FFS of 16 or fewer points were defined as having low dietary diversity. RESULTS The prevalence of CKD was 376 (4.6%), and the low dietary diversity group had higher prevalence (5.6%) compared with the high and low dietary diversity group (4.3%). Multiple logistic regression analysis revealed low dietary diversity was associated with CKD in older adults (OR 1.30, 95%CI 1.01-1.68). Stratified analysis showed that low dietary diversity was independently associated with CKD (OR 1.43, 95% CI 1.07-1.91) in older adults with hypertension, but not in adults without hypertension (OR 0.94, 95% CI 0.54-1.64). CONCLUSIONS AND IMPLICATIONS This cross-sectional study revealed that low dietary diversity was associated with CKD among older adults. Furthermore, low dietary diversity was associated with CKD among older adults with hypertension.
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Affiliation(s)
- Yuto Kiuchi
- Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Research Institute, Morioka, Obu, Aichi, Japan.
- Department of Health Science, Graduate School of Health Sciences Kagoshima University, Sakuragaoka, Kagoshima, Japan.
| | - Kota Tsutsumimoto
- Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Research Institute, Morioka, Obu, Aichi, Japan
| | - Kazuhei Nishimoto
- Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Research Institute, Morioka, Obu, Aichi, Japan
- Medical Science Division, Department of Medical Sciences, Graduate School of Medicine, Science and Technology, Shinshu University, Matsumoto, Nagano, Japan
| | - Yuka Misu
- Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Research Institute, Morioka, Obu, Aichi, Japan
| | - Tomoka Ohata
- Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Research Institute, Morioka, Obu, Aichi, Japan
- Division of Creative Physical Therapy, Field of Prevention and Rehabilitation Sciences, Graduate School of Medicine, Nagoya University, Nagoya, Aichi, Japan
| | - Hyuma Makizako
- Department of Physical Therapy, Faculty of Medicine, School of Health Sciences, Kagoshima University, Sakuragaoka, Kagoshima, Japan
| | - Hiroyuki Shimada
- Department of Preventive Gerontology, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, Research Institute, Morioka, Obu, Aichi, Japan
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Sekizawa O, Uruga T, Takagi Y, Nitta K, Kato K, Tanida H, Uesugi K, Hoshino M, Ikenaga E, Takeshita K, Takahashi S, Sano M, Aoyagi H, Watanabe A, Nariyama N, Ohashi H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Furukawa Y, Ohata T, Matsushita T, Ishizawa Y, Kudo T, Kimura H, Yamazaki H, Tanaka T, Bizen T, Seike T, Goto S, Ohno H, Takata M, Kitamura H, Ishikawa T, Tada M, Yokoyama T, Iwasawa Y. SPring-8 BL36XU: Catalytic Reaction Dynamics for Fuel Cells. ACTA ACUST UNITED AC 2016. [DOI: 10.1088/1742-6596/712/1/012142] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Tanida H, Fukuda K, Murayama H, Orikasa Y, Arai H, Uchimoto Y, Matsubara E, Uruga T, Takeshita K, Takahashi S, Sano M, Aoyagi H, Watanabe A, Nariyama N, Ohashi H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Furukawa Y, Ohata T, Matsushita T, Ishizawa Y, Kudo T, Kimura H, Yamazaki H, Tanaka T, Bizen T, Seike T, Goto S, Ohno H, Takata M, Kitamura H, Ishikawa T, Ohta T, Ogumi Z. RISING beamline (BL28XU) for rechargeable battery analysis. J Synchrotron Radiat 2014; 21:268-72. [PMID: 24365948 PMCID: PMC3874024 DOI: 10.1107/s1600577513025733] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Accepted: 09/17/2013] [Indexed: 06/03/2023]
Abstract
The newly installed BL28XU beamline at SPring-8 is dedicated to in situ structural and electronic analysis of rechargeable batteries. It supports the time range (1 ms to 100 s) and spatial range (1 µm to 1 mm) needed for battery analysis. Electrochemical apparatus for battery charging and discharging are available in experimental hutches and in a preparation room. Battery analysis can be carried out efficiently and effectively using X-ray diffraction, X-ray absorption fine-structure analysis and hard X-ray photoelectron spectroscopy. Here, the design and performance of the beamline are described, and preliminary results are presented.
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Affiliation(s)
| | | | | | | | | | | | | | | | - K. Takeshita
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - S. Takahashi
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | | | | | - N. Nariyama
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - H. Ohashi
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | | | | | | | - Y. Furukawa
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Ohata
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | | | - T. Kudo
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - H. Kimura
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | - T. Tanaka
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Bizen
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Seike
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - S. Goto
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | | | - M. Takata
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - H. Kitamura
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Ishikawa
- JASRI/SPring-8, Japan
- Riken Harima Institute, Japan
| | - T. Ohta
- Ritsumeikan University, Japan
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Sekizawa O, Uruga T, Tada M, Nitta K, Kato K, Tanida H, Takeshita K, Takahashi S, Sano M, Aoyagi H, Watanabe A, Nariyama N, Ohashi H, Yumoto H, Koyama T, Senba Y, Takeuchi T, Furukawa Y, Ohata T, Matsushita T, Ishizawa Y, Kudo T, Kimura H, Yamazaki H, Tanaka T, Bizen T, Seike T, Goto S, Ohno H, Takata M, Kitamura H, Ishikawa T, Yokoyama T, Iwasawa Y. New XAFS beamline for structural and electronic dynamics of nanoparticle catalysts in fuel cells under operating conditions. ACTA ACUST UNITED AC 2013. [DOI: 10.1088/1742-6596/430/1/012020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Nakagawa A, Yamashita E, Umena Y, Yoshimura M, Suzuki M, Hasegawa K, Furukawa Y, Ohata T, Kumasaka T, Ueno G, Yamamoto M, Yoshikawa S, Tsukihara T. SR beamline for macromolecular assemblies by the Institute for Protein Research. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311091082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Watanabe M, Ohata T, Muto K, Takada F. Problems in the regulation of genetic tests in Japan: what can we learn from direct-to-consumer genetic tests? Public Health Genomics 2009; 13:327-35. [PMID: 19864875 DOI: 10.1159/000253123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Accepted: 07/24/2009] [Indexed: 11/19/2022] Open
Abstract
As one of the countries that have invested greatly in the field of bioscience, Japan is facing difficulties introducing human genetic research to the market. A key issue is how to regulate the quality of genetic testing. Since genetic testing is a part of clinical laboratory tests, the regulatory framework for these tests should cover the regulation of genetic testing. Nevertheless, the quality of clinical laboratory tests has been regulated largely by the authority of medical professionals. The fact that genetic testing can be provided without supervision of medical professionals reveals the necessity for the regulation of quality of genetic testing. While medical geneticists have publicly criticized direct-to-consumer (DTC) genetic testing, a group of industries related to DTC genetic testing have established self-regulatory guidelines on the quality control of genetic analysis, based on the OECD guidelines. This article describes the regulatory framework for clinical laboratory tests including genetic tests, and the gaps in regulation, which are particularly highlighted by the appearance of DTC genetic testing. Furthermore the current initiatives taken by different organizations, especially the self-regulatory initiatives by related industries, will be discussed. To conclude the article, recommendations to improve the situation will be made.
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Affiliation(s)
- M Watanabe
- Department of Public Policy, Human Genome Center, The Institute of Medical Sciences, University of Tokyo, Tokyo, Japan.
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Abe Y, Ohata T, Ono S, Aoki M, Miura H, Nagahata M, Hatayama Y, Tsushima F, Morimoto K, Kawaguchi H. Treatment of Superior Vena Cava Syndrome: Efficacy of Radiation Therapy Depends on Histopathology of Underlying Tumors. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kamata S, Sakagoshi N, Ohata T. [Pacemaker implantation in a patient with sick sinus syndrome, complicated with persistent left superior vena cava and absent right superior vena cava; report of a case]. Kyobu Geka 2008; 61:583-586. [PMID: 18616107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A 78-year-old man was referred to our hospital with syncope and palpitation. A Holter electrocardiography (ECG) revealed sick sinus syndrome (SSS), and an enhanced chest computed tomography (CT) scan showed persistent left superior vena cava (PLSVC) and absent right superior vena cava. Myocardial leads and a pacemaker implantation were peformed through left anterior thoracotomy approach. There were only 10 reports of pacemaker implantation in a patient with SSS complicated with PLSVC and absent right superior vena cava in Japan. Open thoracotomy approach was thought to be usuful for these patients.
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Affiliation(s)
- S Kamata
- Department of Cardiovascular Surgery, Rinku General Medical Center, Izumisano, Japan
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Zhang Y, Munkhtsetseg E, Kadota T, Ohata T. An observational study of ecohydrology of a sparse grassland at the edge of the Eurasian cryosphere in Mongolia. ACTA ACUST UNITED AC 2005. [DOI: 10.1029/2004jd005474] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yinsheng Zhang
- Institute of Observational Research for Global Change; Yokosuka Japan
| | | | - T. Kadota
- Institute of Observational Research for Global Change; Yokosuka Japan
| | - T. Ohata
- Institute of Observational Research for Global Change; Yokosuka Japan
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Sakata O, Furukawa Y, Goto S, Mochizuki T, Uruga T, Takeshita K, Ohashi H, Ohata T, Matsushita T, Takahashi S, Ishikawa T, Sumitani K, Takahashi T, Nakamura M, Ito M, Saito A, Shimura T, Takahashi M. Surface and interface structure beamline (BL13XU) at SPring-8. Acta Crystallogr A 2002. [DOI: 10.1107/s010876730209150x] [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: 04/03/2023] Open
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Abstract
A 14-year-old girl with acute myocarditis, transient eosinophilia, and hyper-IgE-emia associated with atopic dermatitis is described. The patient was admitted because of severe heart failure and shock, and severe atopic dermatitis was seen. Blood examinations showed moderate eosinophilia (1917/mm3) and hyper-IgE-emia (830IU/ml). The response to treatment with dopamine was excellent, and the congestive heart failure was gradually ameliorated, followed by improvement in her atopic dermatitis. In addition, rapid improvement in eosinophilia and hyper-IgE-emia was observed. Histopathological examination of the right ventricular myocardium obtained by endomyocardial biopsy showed mild interstitial fibrosis and mild infiltrations of inflammatory cells, indicating myocarditis. We speculated that the transient eosinophilia and hyper-IgE-emia in the present case indicated that an allergen induced strong allergic reactions, including type 1 allergy, and caused both acute myocarditis and deterioration of the atopic dermatitis; specifically noteworthy is that the patient's disease rapidly improved without corticosteroid treatment.
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Affiliation(s)
- T Ito
- Department of Pediatrics, Nakadori General Hospital, Akita, Japan.
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12
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Kawata H, Ohtake S, Sawa Y, Ohata T, Matsuda H. Effect of hemodilution on the adequacy of cerebral perfusion under hypothermic cardiopulmonary bypass. Jpn J Thorac Cardiovasc Surg 2001; 49:595-601. [PMID: 11692584 DOI: 10.1007/bf02916222] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Open heart surgery without transfusion has been performed even in children. However, the critical limit of the hemoglobin level has not yet been ascertained. Here, we have assessed experimentally the effect of the hemoglobin level on brain metabolism under hypothermic cardiopulmonary bypass. METHODS Brain tissue pH was measured in 14 rabbits that were put on bypass with a different degree of hemodilution. Cardiopulmonary bypass was started at 37 degrees C and cooled down to 25 degrees C. After maintaining the bypass at 25 degrees C for 60 minutes, the animal was rewarmed to 37 degrees C for 30 minutes and then kept on-bypass for another 30 minutes. The perfusion flow was maintained as 10 ml/kg/min. RESULTS The lowest hemoglobin level in each rabbit was from 2.5 through 8.5 g/dl. During hypothermic bypass, brain tissue pH increased from 7.21 +/- 0.16 (mean +/- SD, at the normothermic baseline) to 7.55 +/- 0.27 except 2 cases (6.91 +/- 0.16) whose hemoglobin level was lower than 3.0 g/dl. The brain tissue pH after 60 minutes on hypothermic bypass had a good correlation with the hemoglobin level (r = 0.831). After rewarming for 60 minutes, the brain tissue pH was decreased to 7.18 +/- 0.31. In 4 rabbits with less than 4.0 g/dl of hemoglobin, the brain tissue pH (6.67 +/- 0.24) was lower than the baseline level. In the other 10 rabbits, the brain tissue pH (7.22 +/- 0.16) was almost the same as the baseline level. The correlation coefficient between the brain tissue pH and the hemoglobin level after rewarming for 60 minutes was 0.778. CONCLUSIONS These results indicated that severe hemodilution in cardiopulmonary bypass promoted acidosis in brain even during hypothermia.
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Affiliation(s)
- H Kawata
- Department of Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
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13
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Abstract
BACKGROUND Few reports have assessed differences in the durability of mitral and tricuspid bioprostheses after simultaneous implantation of the same bioprosthesis in both positions. We investigated the long-term outcome after simultaneous mitral valve replacement (MVR) and tricuspid valve supraannular implantation (TVSI) with the Carpentier-Edwards bioprostheses in patients with severe tricuspid regurgitation and advanced mitral valve disease. METHODS Between 1982 and 1998, 37 patients in our hospital underwent MVR and TVSI with Carpentier-Edwards bioprostheses. The mean age of the patients was 55+/-11 years. The average postoperative follow-up was 7.9+/-4.5 years after surgery (range 0 to 14.6 years, 315.1 patient-years). The follow-up rate was 100%. We evaluated the actuarial survival rate, the actuarial freedom from structural valve deterioration (SVD) and reoperation, and postoperative complications. RESULTS The overall actuarial survival rate at 13 years after the operation was 69%+/-31%. The actuarial freedom from SVD and reoperation in the mitral and tricuspid positions were 78+/-22 and 100% and 70+/-30 and 90%+/-10% (p = 0.03), respectively. No patient had systemic or pulmonary thromboembolism, or complications associated with fatal arrhythmia. CONCLUSIONS These results suggest that the bioprostheses in the tricuspid position yield significantly better long-term results than those in the mitral position after simultaneous MVR and TVSI.
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Affiliation(s)
- T Ohata
- Division of Cardiovascular Surgery, Mitsui Memorial Hospital, Tokyo, Japan.
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Abstract
BACKGROUND Tricuspid valve supra-annular implantation (TVSI) has been performed for adult patients with Ebstein's anomaly at our hospital for several decades. TVSI is characterized by reliable reduction of tricuspid annulus size without affecting the conduction system; by prevention of residual tricuspid regurgitation (RTR) through preservation of the native tricuspid valve; and by implantation of the bioprosthesis at a supra-annular site. METHODS Ten adult patients with Ebstein's anomaly underwent TVSI. The right ventricular diameter and residual tricuspid regurgitation were evaluated by echocardiography preoperatively, at discharge, 1 year after the operation, and over the long term (12.4 +/- 5.5 years). Actuarial survival rate, actuarial freedom from structural valve deterioration rate, and postoperative occurrence of arrhythmia were also evaluated. RESULTS The actuarial survival rate at 19 years was 76 +/- 15%. Tricuspid regurgitation disappeared in 8 patients just after operation. Right ventricular diameter was significantly smaller at discharge than preoperatively (63 +/- 11 vs 37 +/- 9, p < 0.01), and there were no significant differences between values at discharge and at follow-up. The actuarial freedom from structural valve deterioration rate and the reoperation rate were both 100%. There were no fatal complications related to arrhythmia or thromboembolism. CONCLUSIONS TVSI is useful for adult patients with Ebstein's anomaly. The absence of complications related to fatal arrhythmia and thromboembolism, good durability of the bioprosthesis, and a simple operative procedure are merits of this therapy.
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Affiliation(s)
- M Tanaka
- Division of Cardiovascular Surgery, Mitsui Memorial Hospital, Tokyo, Japan.
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Hiraoka N, Itou M, Ohata T, Mizumaki M, Sakurai Y, Sakai N. A new X-ray spectrometer for high-resolution Compton profile measurements at SPring-8. J Synchrotron Radiat 2001; 8:26-32. [PMID: 11486493 DOI: 10.1107/s0909049500018197] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2000] [Accepted: 11/20/2000] [Indexed: 05/23/2023]
Abstract
An X-ray spectrometer for high-resolution Compton profile measurements using 90-120 keV X-rays has been designed and constructed at SPring-8. A Cauchois-type triply layered bent-crystal analyzer was employed for the energy analysis. A novel use of a solid-state detector with a large active area was devised as a position-sensitive detector. A resolution of 0.10 atomic units in electron momentum has been achieved at an incident X-ray energy of 115 keV. A Compton profile of a single crystal of Nb was measured with a counting rate of 30 counts s-1 at the Compton peak, which demonstrates that the spectrometer is capable of measuring Compton profiles of heavy-element materials.
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Affiliation(s)
- N Hiraoka
- Himeji Institute of Technology, Kouto 1-2-3, Kamigori, Ako, Hyogo 678-1297, Japan.
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Ohata T, Sakakibara T, Takano H, Izutani H, Inoue Y. Rapid enlargement of a distal arch aneurysm after endovascular stent-grafting for pseudoaneurysm: case report. J Thorac Cardiovasc Surg 2000; 120:824-6. [PMID: 11003775 DOI: 10.1067/mtc.2000.108696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- T Ohata
- Division of Cardiovascular Surgery, Osaka Police Hospital, Osaka, Japan.
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Ohata T, Sawa Y, Kadoba K, Kagisaki K, Suzuki K, Matsuda H. Role of nitric oxide in a temperature dependent regulation of systemic vascular resistance in cardiopulmonary bypass. Eur J Cardiothorac Surg 2000; 18:342-7. [PMID: 10973545 DOI: 10.1016/s1010-7940(00)00455-3] [Citation(s) in RCA: 8] [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: 10/18/2022] Open
Abstract
OBJECTIVES Nitric oxide is the most potent vasodilator among inflammation-mediated vasoactive substances. Tepid cardiopulmonary bypass has been known to maintain low vascular resistance and nitric oxide may also be involved. There has been no previous clinical study elucidating a role of nitric oxide in a temperature dependent regulation of systemic vascular resistance in cardiopulmonary bypass. METHODS Thirty-one patients who underwent valvular surgery were randomly divided into two comparable groups; consisting of the hypothermic cardiopulmonary bypass (28 degrees C:14 patients) and the tepid cardiopulmonary bypass group (34 degrees C:17 patients). The serum levels of nitric oxide (NO(2)(-)+NO(3)(-)), prostaglandin E(2), bradykinin, 6-keto PGF1alpha, thromboxane B(2), endothelin-1, systemic vascular resistance index were measured before, 0, 12 and 24 h after cardiopulmonary bypass. RESULTS The pattern of change in systemic vascular resistance index and nitric oxide during and after cardiopulmonary bypass were significantly different between the two groups (P=0.0008, P=0.02). The tepid group showed significantly lower levels of systemic vascular resistance index after cardiopulmonary bypass than the hypothermic group (0 h: 2278+/-735 vs. 4387+/-1289, 12 h: 1827+/-817 vs. 2817+/-1146 and 24 h: 1690+/-548 vs. 2761+/-641 dyne s cm(-5) m(2), P=0.0001, P=0.03, P=0. 0006). The nitric oxide levels were significantly higher at 0, 12 and 24 h after cardiopulmonary bypass in the tepid group than those in the hypothermic group (84.7+/-33.3 vs. 46.3+/-18.1, 69.8+/-31.1 vs. 40.1+/-17.5 and 80.1+/-38.5 vs. 39.1+/-15.6 micromol/l, P=0.008, P=0.03, P=0.01). The prostaglandin E(2) levels in the tepid group was significantly higher just after cardiopulmonary bypass than that in the hypothermic group (37.3+/-20.0 vs. 15.8+/-8.6 pg/ml, P=0.02). The bradykinin level in the hypothermic group was significantly higher just after cardiopulmonary bypass than that in the tepid group (2.40+/-0.32 vs. 1.85+/-0.21 log(10) (pg/ml), P=0.005). Only nitric oxide showed a significant negative correlation with the systemic vascular resistance index both during and after cardiopulmonary bypass (r=-0.60, P<0.0001) as compared with prostaglandin E(2) and bradykinin. CONCLUSIONS These findings demonstrated that serum nitric oxide levels in tepid cardiopulmonary bypass were significantly higher than those in hypothermic cardiopulmonary bypass. Nitric oxide correlated with systemic vascular resistance. Thus, nitric oxide may play a pivotal role in a temperature dependent regulation of systemic vascular resistance in cardiopulmonary bypass.
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Affiliation(s)
- T Ohata
- First Department of Surgery, Osaka University Medical School, 2-2 Yamada-oka, Suita, 565-0871, Osaka, Japan.
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Ohata T, Kigawa I, Yamashita Y, Wanibuchi Y. Surgical strategy for severe tricuspid valve regurgitation complicated by advanced mitral valve disease: long-term outcome of tricuspid valve supra-annular implantation in eighty-eight cases. J Thorac Cardiovasc Surg 2000; 120:280-3. [PMID: 10917943 DOI: 10.1067/mtc.2000.107486] [Citation(s) in RCA: 10] [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: 11/22/2022]
Abstract
OBJECTIVE Although annuloplasty has been the most commonly performed surgical modality for severe tricuspid regurgitation, tricuspid valve supra-annular implantation has been performed in our hospital for more than a decade. The aim of this study was to assess the long-term outcome of tricuspid valve supra-annular implantation in a subgroup of patients with severe tricuspid regurgitation, those who also had advanced mitral valve disease. METHODS Mitral valve replacement in conjunction with tricuspid valve supra-annular implantation was performed on 88 patients at our hospital between 1984 and 1998. The patients (mean age 57 +/- 11 years) were followed up for an average of 7.2 +/- 4.5 years after the operation (range 0-14 years); total follow-up was 643.1 patient-years. All patients except 2 (97.6%) were included in the follow-up. We evaluated the mortality, the cause of death, survival, the freedom from structural valve deterioration and reoperation, postoperative complications, and long-term echocardiographic findings. RESULTS Overall survival at 14 years was 69% +/- 7.7%. Freedom from structural valve deterioration at 14 years was 100% and from reoperation, 88% +/- 9. 4%. There were no instances of pulmonary thromboembolism or of complications associated with fatal arrhythmias. Echocardiography showed little residual tricuspid regurgitation, no atrophic and stenotic change in the native tricuspid valve, and no thrombus formation between native valve and the implanted bioprosthesis. CONCLUSIONS The procedure's simplicity, the good long-term durability of the bioprosthesis, and the absence of fatal arrhythmias and pulmonary thromboembolism indicate that tricuspid valve supra-annular implantation is a useful procedure for patients with severe tricuspid regurgitation complicated by advanced mitral valve disease.
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Affiliation(s)
- T Ohata
- Division of Cardiovascular Surgery, Mitsui Memorial Hospital, Tokyo, Japan
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19
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Noguchi A, Shoji Y, Koizumi A, Takahashi T, Matsumori M, Kayo T, Ohata T, Wada Y, Yoshimura I, Maisawa S, Konishi M, Takasago Y, Takada G. SLC7A7 genomic structure and novel variants in three Japanese lysinuric protein intolerance families. Hum Mutat 2000; 15:367-72. [PMID: 10737982 DOI: 10.1002/(sici)1098-1004(200004)15:4<367::aid-humu9>3.0.co;2-c] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Lysinuric protein intolerance (LPI) is a rare inherited disease caused by defective transport of the dibasic amino acids at the basolateral membranes of epithelial cells in the renal tubules and small intestine. The metabolic defect leads to brain dysfunction caused by hyperammonemia with a functional impairment of the urea cycle. Recently, mutations in the human SLC7A7 cDNA coding for y(+)LAT-1, which express dibasic amino acid transport activity, were reported to be responsible for LPI. In the present study, we examined the genomic structure of SLC7A7 by DNA sequencing of PCR products, and determined that the gene had 11 exons and 10 introns spanning about 18 kb of genomic DNA. We also identified an alternative RNA splicing at the 5' untranslated region of the SLC7A7 mRNA in human peripheral blood leukocytes, cultured lymphoblasts, and fibroblasts. As a result of mutational analysis of SLC7A7 in three Japanese LPI families, we found a nonsense mutation (R410X), a splicing mutation(911+1G>A) in intron 4, and four silent polymorphisms (201C/T, 445A/G, 784C/T, 946T/C). Identification of the genomic structure of SLC7A7 may provide a molecular basis for a genetic survey for LPI.
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Affiliation(s)
- A Noguchi
- Department of Pediatrics, Akita University School of Medicine, Akita, Japan
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20
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Ohata T, Kigawa I, Wanibuchi Y. Difference in structural change in the Carpentier-Edwards pericardial valves implanted in the mitral and tricuspid positions. Jpn J Thorac Cardiovasc Surg 2000; 48:242-4. [PMID: 10824479 DOI: 10.1007/bf03218131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a 29-year-old patient with prosthetic valve dysfunction with severe calcific stenosis in the mitral position but no structural change in the tricuspid position after mitral valve replacement and tricuspid valve supra-annular implantation with same bioprostheses at the seven years before. The difference in structural change between the mitral position and the tricuspid position might be due mainly to the effect of mechanical stress on the cusps, rather than to any difference in serum calcium levels. However, some hormonal effect other than that of the parathyroid hormone on the systemic and pulmonary circulation might be related to the early progression in cusp calcification in the systemic circulation.
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Affiliation(s)
- T Ohata
- Division of Cardiovascular Surgery, Mitsui Memorial Hospital, Tokyo, Japan
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21
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Ohata T, Sawa Y, Ohtake S, Nishimura M, Chan CJ, Suzuki K, Matsuda H. Clinical role of blood heparin level monitoring during open heart surgery. Jpn J Thorac Cardiovasc Surg 1999; 47:600-6. [PMID: 10658377 DOI: 10.1007/bf03218071] [Citation(s) in RCA: 11] [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: 11/24/2022]
Abstract
Protamine has been used for neutralizing heparin and its dosage is decided by the initial fixed dose of heparin. Adequate protamine neutralization is very important to reduce complications. To attenuate excess reactions, in particular, whole blood heparin concentration during and after cardiopulmonary bypass was measured using Hepcon, and the efficacy of optimal protamine dose in open heart surgery was evaluated. Twenty patients were randomly divided into two comparable groups, P and C. In the C group, heparin was neutralized with an initial fixed dose of protamine, 1.67 mg protamine per milligram total heparin (n = 8). In the P group, protamine dose was determined for residual heparin concentration (n = 12). In the P group, blood heparin concentrations at 60 minutes after the establishment of cardiopulmonary bypass, just after cardiopulmonary bypass and first protamine administration were 2.35 +/- 0.14, 2.31 +/- 0.17 and 0.13 +/- 0.08 U/ml, respectively. Concentrations reached zero with the second protamine administration. The requirement of transfusion (659 +/- 224 vs. 1559 +/- 323 ml, p = 0.0314), pulmonary vascular resistance index just after the protamine administration (190 +/- 22 vs. 286 +/- 18 dyne.s.cm-5.m2, p = 0.0137) and the IL-8 levels (just after protamine: 26.9 +/- 5.1 vs. 43.5 +/- 5.9 pg/ml, p = 0.0499, 12 hours after cardiopulmonary bypass: 37.1 +/- 12.1 vs. 86.8 +/- 20.0, p = 0.0435) in the P group were significantly lower than those in the C group. These data suggested that heparin level monitoring in whole blood may be useful to determine the optimal dose of protamine resulting in the decrease of a requirement of blood components in open heart surgery and attenuating in transient pulmonary hypertension and excess protamine-induced inflammatory reactions.
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Affiliation(s)
- T Ohata
- First Department of Surgery, Osaka University Medical School, Japan
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22
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Kogaki S, Sawa Y, Sano T, Matsushita T, Ohata T, Kurotobi S, Tojo SJ, Matsuda H, Okada S. Selectin on activated platelets enhances neutrophil endothelial adherence in myocardial reperfusion injury. Cardiovasc Res 1999; 43:968-73. [PMID: 10615424 DOI: 10.1016/s0008-6363(99)00140-6] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [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: 10/18/2022] Open
Abstract
OBJECTIVES The glycoprotein P-selectin is an adhesion molecule that is rapidly expressed on the surface of platelets and endothelium during the inflammatory process. P-selectin on endothelium has been reported to play an important role in reperfusion injury. However, little is known regarding P-selectin on platelets in contributing to the pathophysiology of myocardial reperfusion injury. In this study, we hypothesized that P-selectin on platelets may enhance neutrophil endothelial adherence and this may play a role in neutrophil-mediated reperfusion injury. METHODS Endothelial cells, cardiomyocytes, platelets and neutrophils were isolated from adult rats. Endothelial cells and cardiomyocytes were cultivated in a co-culture system. After exposure to hypoxia and reoxygenation, neutrophil adherence and migration were examined. RESULTS After exposure to 6 h of hypoxia, endothelial cells co-incubated with platelets showed significantly greater neutrophil adherence (63.1 +/- 4.0%) and migration (78.2 +/- 6.7%) than endothelial cells alone (adhesion: 44.2 +/- 2.8%, migration: 57.9 +/- 4.9%). These increases were significantly inhibited (adhesion: 42.1 +/- 3.5%, migration: 65.5 +/- 3.8%) by an anti-P-selectin monoclonal antibody. Moreover, the superoxide-anion production was significantly elevated when activated platelets were added to neutrophils. This enhanced production was also inhibited by anti-P-selectin antibody. CONCLUSION The presence of activated platelets enhanced neutrophil adhesion and migration process after hypoxia reoxygenation. This process may occur following platelet-neutrophil interactions via P-selectin and subsequent neutrophil activation.
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Affiliation(s)
- S Kogaki
- Department of Pediatrics, Faculty of Medicine, Osaka University, Japan
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23
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Ohata T, Sawa Y, Takagi M, Inoue T, Yoshida T, Kogaki S, Matsuda H. Hybrid artificial lung with interleukin-10 and endothelial constitutive nitric oxide synthase gene-transfected endothelial cells attenuates inflammatory reactions induced by cardiopulmonary bypass. Circulation 1998; 98:II269-74. [PMID: 9852913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
BACKGROUND Recently, the research on hybrid artificial organs such as heart, liver, and kidney has been reported to yield new possibilities for clinical use. However, there have been few reports on the practical use of a hybrid artificial lung, primarily due to difficulties in the concept for its application and techniques for cell attachment. In this study, we investigated the possibility for developing a novel strategy: a hybrid artificial lung with constitutive nitric oxide synthase (NOS) and interleukin (IL)-10 gene-transfected endothelial cells to attenuate inflammatory reactions induced by cardiopulmonary bypass. METHODS AND RESULTS First, we performed an in vitro study to confirm the efficacy of our gene transfection into endothelial cells. Constitutive nitric oxide synthase and IL-10 cDNA were transfected into endothelial cells according to the hemagglutinating virus of Japan-liposome method. Levels of nitric oxide released from the endothelial constitutive NOS (ecNOS)-transfected endothelial cells were significantly higher than those of control cells (24 hours after the stimulation by lipopolysaccharide: 284.5 +/- 54.0 versus 95.7 +/- 27.9 mumol/L, P = 0.0001). On the other hand, IL-8 levels in the transfected endothelial cells were significantly lower than those in the control group (48 hours after stimulation by tumor necrosis factor-alpha: 3.1 +/- 2.4 versus 62.1 +/- 1.3 ng/mL, P = 0.0002), and IL-10 was detected in the transfected group but not in the control group. Next, we performed an in vivo study to evaluate the possibility of developing a hybrid artificial lung. One-hour partial cardiopulmonary bypass with this lung was established in rats undergoing femorofemoral bypass. Artificial lungs with no cells (group C; n = 5), that were coated with untreated endothelial cells (group E; n = 5), or that were coated with ecNOS and IL-10 gene-transfected endothelial cells (group T; n = 3) were used. At 45 minutes after the initiation of cardiopulmonary bypass, group T showed higher nitric oxide levels than groups C and E (T versus C versus E: 75.2 +/- 6.8 versus 67.2 +/- 4.3 versus 68.6 +/- 5.2 mumol/L, P = NS). The serum IL-8 levels just after cardiopulmonary bypass in group T were significantly lower than those in group C (1728 +/- 282 versus 4275 +/- 145 pg/mL, P = 0.0151). The Pao2 levels in group T just after weaning from cardiopulmonary bypass were significantly higher than those in group C (271.3 +/- 41.7 versus 136.6 +/- 12.3 mm Hg, P = 0.0362). CONCLUSIONS These results demonstrate that a hybrid artificial lung with IL-10 and ecNOS gene-transfected endothelial cells inhibited IL-8 release and increased nitric oxide production. This suggests the possibility of developing a hybrid artificial lung capable of preserving native lung function by attenuating cardiopulmonary bypass-induced inflammatory reactions via inhibition of IL-8 release and enhanced nitric oxide production.
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Affiliation(s)
- T Ohata
- First Department of Surgery, Osaka University Medical School, Japan
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24
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Ohata T, Fukuda S, Kigawa I, Osaka M, Yamashita Y, Wanibuchi Y, Kato M. Limitation of implantation of endovascular stent-graft: case report of a patient with thoracoabdominal aneurysm. J Thorac Cardiovasc Surg 1998; 116:876-7. [PMID: 9806397 DOI: 10.1016/s0022-5223(98)00435-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Affiliation(s)
- T Ohata
- Division of Cardiovascular Surgery, Mitsui Memorial Hospital, Tokyo, Japan
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25
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Ohata T, Koizumi A, Kayo T, Shoji Y, Watanabe A, Monoh K, Higashi K, Ito S, Ogawa O, Wada Y, Takada G. Evidence of an increased risk of hearing loss in heterozygous carriers in a Wolfram syndrome family. Hum Genet 1998; 103:470-4. [PMID: 9856492 DOI: 10.1007/s004390050852] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Wolfram syndrome (MIM 222300) is characterized by juvenile-onset diabetes mellitus and optic atrophy. Previous linkage analyses in the United States and UK families have indicated that the gene for Wolfram syndrome (WFS) is localized on the short arm of chromosome 4. We herein confirm the linkage of the WFS locus to D4S3023 on 4p with a two-point LOD score of 3.42 in a large Japanese family with Wolfram syndrome. Multipoint linkage analysis revealed the maximum LOD score of 4.82 between D4S3023 and D4S394. We also evaluated putative health risks in carriers by multiple logistic analysis with independent variables, age, gender, and numbers of affected haplotypes and with dependent variables, such as hearing loss, diabetes mellitus, polyuria, incontinence, psychological illness, and visual acuity. The results showed that the putative disease haplotype increased a risk of hearing loss (odds ratio =35.68, 95% confidence interval =4.12-308.95) and diabetes mellitus (odds ratio =7.57, 95% confidence interval =2.03-28.23) independently. This is the first report of an increased health risk of illness in carriers, other than for psychiatric disease.
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Affiliation(s)
- T Ohata
- Department of Hygiene, Akita University School of Medicine, Japan
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26
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Sawa Y, Ichikawa H, Kagisaki K, Ohata T, Matsuda H. Interleukin-6 derived from hypoxic myocytes promotes neutrophil-mediated reperfusion injury in myocardium. J Thorac Cardiovasc Surg 1998; 116:511-7. [PMID: 9731794 DOI: 10.1016/s0022-5223(98)70018-2] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.4] [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: 02/08/2023]
Abstract
BACKGROUND Reperfusion injury in the myocardium has recently been considered to be a type of inflammation, and close attention has been paid to the possible involvement of neutrophils, complement, and cytokines in the onset of this injury. Recently, it has been reported that serum levels of interleukin-6 are elevated significantly after myocardial infarction. The major site of interleukin-6 production and its exact roles are still unknown. In this study, we hypothesized that myocytes may produce interleukin-6 during hypoxia and this may play a role in neutrophil-mediated reperfusion injury. METHODS AND RESULTS In the clinical study, 20 patients who underwent coronary artery bypass grafting were divided into 2 groups: group F, in which patients were treated with a serine protease inhibitor (FUT-175, 2 mg/kg per hour) during cardiopulmonary bypass, and group C (untreated patients). In group C, myocardial interleukin-6 production, as determined by the difference between the interleukin-6 level in the cardiopulmonary bypass circuit and its level in coronary venous blood, increased significantly after reperfusion (12+/-4 pg/mL) as compared with that before aortic crossclamping (2+/-2 pg/mL). In group F, the increase in the interleukin-6 level was suppressed significantly (before aortic crossclamping, 3+/-2 pg/mL; after reperfusion, 4+/-3 pg/mL). The interleukin-6 production differed significantly between group C and group F. In the in vitro experimental study, the supernatant from myocytes exposed to 2 hours of hypoxia (group 2H) showed significantly higher levels of interleukin-6 (455+/-260 pg/mL) than that from normoxic myocytes (group N) (47+/-15 pg/mL). This interleukin-6 production was suppressed by the addition of FUT-175 (123+/-24 pg/mL). The interleukin-6 production by endothelial cells of coronary vessels did not differ between group 2H (283+/-151 pg/mL) and group N (151+/-86 pg/mL). In a coincubation system with a monolayer of endothelial cells on collagen membrane and myocytes under collagen membrane in a modified Boyden chamber, 2 hours of coincubation showed a significantly higher percent of neutrophil transendothelial migration (group 2H vs N, 78%+/-13% vs 26%+/-11%), value of chemiluminescence (22+/-8 vs 5+/-2 x 10(3) counts/3 minutes), and percent of irreversibly damaged myocytes (48%+/-17% vs 12%+/-8%) than normoxic coincubation. In contrast, anti-interleukin-6 monoclonal antibody significantly attenuated neutrophil transendothelial migration (42%+/-19%) and irreversible damage of myocytes (26%+/-15%) in 2 hours of coincubation. CONCLUSIONS Interleukin-6 is produced from myocardium during ischemia and reperfusion in patients undergoing coronary bypass grafting. This interleukin-6 may be derived from hypoxic myocytes and play a role in neutrophil-mediated reperfusion injury in myocardium.
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Affiliation(s)
- Y Sawa
- First Department of Surgery, Osaka University Medical School, Suita, Japan
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27
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Yamazumi T, Kuroda T, Ohata T, Obana Y, Furuta I. [Antifungal susceptibility of clinically isolated Candida albicans by broth microdilution method]. Kansenshogaku Zasshi 1998; 72:813-9. [PMID: 9780584 DOI: 10.11150/kansenshogakuzasshi1970.72.813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
In this study we investigated the antifungal susceptibility of 285 strains of Candida albicans isolates at Kinki University Hospital from March 1995 to December 1996. The antifungal agents tested were fluconazole, miconazole, intraconazole, amphotericin B and flucytosine. The susceptibility testing were performed according to the broth microdilution method standardized by National Committee for Clinical Laboratory Standards (M27-T). Most isolates of C. albicans showed relatively a low MIC value and the MIC90S were calculated at 1 microgram/ml; fluconazole, 0.125 microgram/mg; miconazole, 0.06 microgram/ml; itraconazole, 1 microgram/ml; amphotericin B, 0.25 microgram/ml; flucytosine. There was only one strain that showed high resistance against fluconazole and it showed cross-resistance against miconazole and itraconazole. There were two flucytosine resistant strains. The MICs of amphotericin B were tightly clustered and resistant strain were not observed.
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Affiliation(s)
- T Yamazumi
- Department of Clinical Pathology, Kinki University School of Medicine
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28
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Ohata T, Sawa Y, Ohtake S, Nishimura M, Hirata N, Kagisaki K, Taketani S, Yamaguchi T, Matsuda H. [Evaluation of cerebral circulation during cardiopulmonary bypass using near-infrared spectroscopy]. Jpn J Thorac Cardiovasc Surg 1998; 46:603-9. [PMID: 9750442 DOI: 10.1007/bf03217788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Cerebral oxygenation level during cardiopulmonary bypass (CPB) was measured using near-infrared spectroscopy as a monitor of cerebral circulation in 30 patients. Six adult cases with thoracic aortic aneurysm were operated on using selective cerebral perfusion (SCP). CPB was established under moderate hypothermic temperature in 9 adult cases (hypothermic group, lowest blood temperature during CPB; 25 degrees C) and under normothermic temperature in 9 adult cases (normothermic group, lowest blood temperature during CPB; 34 degrees C). In congenital cases (n = 6), CPB was established under moderate hypothermic temperature (congenital group, lowest blood temperature; 25 degrees C). The oxyhemoglobin (HbO2) level showed a significant positive correlation with cerebral blood flow during SCP (r = 0.715). There was no significant correlation between SjO2 and HbO2 in the SCP group. The HbO2 levels in the hypothermic group after 30 and 60 min, from the initiation of CPB and 30 min. before the weaning of CPB were significant lower than the control level (p < 0.05). HbO2 levels in the congenital group after 0, 30 and 60 min. from the initiation of CPB and 30 min. before the weaning of CPB were significantly lower than the control level (p < 0.01). The deoxyhemoglobin (HbR) level in the hypothermic group after 30 and 60 from the initiation of CPB and 30 min. before the wearing of CPB were significantly higher than the pre level (p < 0.05). The mixed venous saturation (SvO2) in the normothermic group showed significant lower levels than those in the hypothermic group (p < 0.01). However, there was no significant difference in HbO2 levels between the two groups. In conclusion, these results suggest that near-infrared spectroscopy may be a noninvasive and useful technique for the cerebral circulation monitoring during CPB.
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Affiliation(s)
- T Ohata
- First Department of Surgery, Osaka University Medical School, Japan
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29
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Shoji Y, Koizumi A, Kayo T, Ohata T, Takahashi T, Harada K, Takada G. Evidence for linkage of human primary systemic carnitine deficiency with D5S436: a novel gene locus on chromosome 5q. Am J Hum Genet 1998; 63:101-8. [PMID: 9634512 PMCID: PMC1377235 DOI: 10.1086/301911] [Citation(s) in RCA: 41] [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] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Primary systemic carnitine deficiency (SCD) is a rare hereditary disorder transmitted by an autosomal recessive mode of inheritance. The disorder includes cardiomyopathy, muscle weakness, hypoketotic coma with hypoglycemia, and hyperammonemia. In this study, we conducted a linkage analysis of a Japanese SCD family with a proband-a 9-year-old girl-and 26 members. The serum and urinary carnitine levels were determined for all members. The entire genome was searched for linkage to the gene locus for SCD, by use of a total of approximately 300 polymorphic markers located approximately 15-20 cM apart. In the family, there were two significantly different phenotypes, in terms of serum free-carnitine levels: low serum free-carnitine level (29.5+/-5.0 microM; n=14) and normal serum free-carnitine level (46.8+/-6.2 microM; n=12). There was no correlation of urinary free-carnitine levels with the low serum-level phenotype (putative heterozygote), but in normal phenotypes (wild type) urinary levels decreased as the serum levels decreased; renal resorption of free carnitine appeared to be complete in wild-type individuals, when the serum free-carnitine level was <36 microM. Linkage analysis using an autosomal dominant mode of inheritance of heterozygosity revealed a tight linkage between the disease allele and D5S436 on chromosome 5q, with a two-point LOD score of 4.98 and a multipoint LOD score of 5.52. The haplotype analysis revealed that the responsible genetic locus lies between D5S658 and D5S434, which we named the "SCD" locus. This region was syntenic with the jvs locus, which is responsible for murine SCD. Phylogenic conversion of the SCD locus strongly suggests involvement of a single gene, in human SCD.
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Affiliation(s)
- Y Shoji
- Department of Pediatrics, Akita University School of Medicine, Akita, Japan
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30
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Ohata T, Fukuda K, Murakami A, Ohigashi H, Sugimura T, Wakabayashi K. Inhibition by 1'-acetoxychavicol acetate of lipopolysaccharide- and interferon-gamma-induced nitric oxide production through suppression of inducible nitric oxide synthase gene expression in RAW264 cells. Carcinogenesis 1998; 19:1007-12. [PMID: 9667738 DOI: 10.1093/carcin/19.6.1007] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Although nitric oxide (NO) is an important biological mediator, excessive production in inflammation is thought to be a causative factor of cellular injury and cancer in the long term. In the present study the effects of 1'-acetoxychavicol acetate (ACA), which has anticarcinogenic properties, on NO production in murine macrophage cell line RAW264 cells stimulated with lipopolysaccharide or interferon-gamma were examined. ACA suppressed NO production dose dependently with an IC50 of 160 ng/ml (680 nM). The decrease in NO production was shown to parallel reduced expression of iNOS mRNA and protein. The influence of ACA on transcription factors, such as NF-kappaB, AP-1 and Stat1, which are involved in expression of the iNOS gene was assessed. ACA was found to suppress degradation of IkappaB, an NF-kappaB inhibitory factor, and consequently inhibit NF-kappaB activation. Activation of AP-1 and Stat1 was also blocked by ACA treatment. Thus we demonstrate that ACA exerts potent inhibitory effects on NO production, apparently mediated by modulation of activation of several transcription factors. This could contribute to the anticarcinogenic properties of ACA.
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Affiliation(s)
- T Ohata
- Cancer Prevention Division, National Cancer Center Research Institute, Tokyo, Japan
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31
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Ohata T, Konishi H, Kimura H, Furukawa Y, Tamasaku K, Nakatani T, Tanabe T, Matsumoto N, Ishii M, Ishikawa T. SPring-8 beamline control system. J Synchrotron Radiat 1998; 5:590-592. [PMID: 15263588 DOI: 10.1107/s0909049597016038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/1997] [Accepted: 11/10/1997] [Indexed: 05/24/2023]
Abstract
The SPring-8 beamline control system is now taking part in the control of the insertion device (ID), front end, beam transportation channel and all interlock systems of the beamline: it will supply a highly standardized environment of apparatus control for collaborative researchers. In particular, ID operation is very important in a third-generation synchrotron light source facility. It is also very important to consider the security system because the ID is part of the storage ring and is therefore governed by the synchrotron ring control system. The progress of computer networking systems and the technology of security control require the development of a highly flexible control system. An interlock system that is independent of the control system has increased the reliability. For the beamline control system the so-called standard model concept has been adopted. VME-bus (VME) is used as the front-end control system and a UNIX workstation as the operator console. CPU boards of the VME-bus are RISC processor-based board computers operated by a LynxOS-based HP-RT real-time operating system. The workstation and the VME are linked to each other by a network, and form the distributed system. The HP 9000/700 series with HP-UX and the HP 9000/743rt series with HP-RT are used. All the controllable apparatus may be operated from any workstation.
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Affiliation(s)
- T Ohata
- Japan Synchrotron Radiation Research Institute (JASRI), Kamigori, Ako-gun, Hyogo 678-12, Japan
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32
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Oguchi M, Ikeda H, Watanabe T, Shikama N, Ohata T, Okazaki Y, Kiyono K, Sone S. Experiences of 23 patients > or = 90 years of age treated with radiation therapy. Int J Radiat Oncol Biol Phys 1998; 41:407-13. [PMID: 9607359 DOI: 10.1016/s0360-3016(98)00052-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [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: 02/07/2023]
Abstract
PURPOSE To present 23 patients > or = 90 years old treated with radiotherapy, and to retrospectively evaluate the results of radiotherapy and tolerance in these patients. METHODS AND MATERIALS The clinical records of 27 patients over 90 years of age who were treated with radiotherapy at the Department of Radiology, Shinshu University Hospital, and eight affiliated general hospitals from 1990 until 1995 were reviewed. The strategy of radiotherapy was individually planned depending on the stage of the disease and performance status (PS) of the patient; however, it was not modified, based solely on chronologic age. The overall survival rate and disease-free survival rate were determined using the Kaplan-Meier method. The Radiation Therapy Oncology Group scoring criteria of acute and late reactions of radiation therapy were used. RESULTS This group of patients accounted for 0.37% of all patients treated with radiotherapy in these hospitals. Of these, 23 patients in whom cancer was pathologically confirmed and whose follow-up data were available for retrospective analysis were included in the final evaluation of data. The age of the 23 patients ranged from 90 to 96 years (median 93). Tumor was untreated and in the early stage in five patients, locoregionally advanced in 13, recurrent in four, and systemic in one. Definitive radiation therapy was administered in 12 patients (13 sites), preoperative intent in one, and palliative intent in 10. The period of observation ranged from 2.5 to 6 years (median 18 months). Seven patients were alive for 15-67 months. Fourteen patients died because of intercurrent diseases or senility associated with active cancer, and two because of senility without evidence of cancer. The overall and relapse-free survival rates were 65% and 30% at 1 year and 30% and 21% at 2 years, respectively. Definitive radiation therapy was completed in 13 of 13 patients (100%), and local control was attained in 9 of 13 patients at 6 months (62%). Palliative radiation therapy was completed as intended in 7 of 11 (64%), and effects of palliation were observed in 9 of 11 patients (81%). Acute dermatitis, mucositis, pharyngitis, esophagitis, and cystitis of grade 2-3 related to the definitive radiation therapy were tolerable for the patients with good PS. It took 3-7 weeks (median 5) for acute moist desquamation of six lesions of skin cancer to heal. Depending on the radiation doses, grade 1-2 atrophy of skin and telangiectasia were documented for eight patients followed up for more than 1 year. A brief description of representative case is presented. CONCLUSION Patients older than 90 years with good PS may tolerate the acute effects of radiotherapy administered according to conventional fractionation schedules. Definitive radiation therapy should be considered, when applicable, even for patients older than 90 years.
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Affiliation(s)
- M Oguchi
- Department of Radiology, Shinshu University, School of Medicine, Matsumoto, Nagano, Japan
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Umemura T, Yamamura N, Nagata A, Shibata A, Yamashita K, Ohata T, Yamada T, Katsuyama T, Kiyosawa K. Case report: Steatonecrosis in the upper abdomen following transcatheter arterial embolization for hepatocellular carcinoma. J Gastroenterol Hepatol 1998; 13:471-4. [PMID: 9641642 DOI: 10.1111/j.1440-1746.1998.tb00670.x] [Citation(s) in RCA: 9] [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: 12/09/2022]
Abstract
A 66-year-old female with liver cirrhosis was treated by transcatheter arterial embolization (TAE) for a small hepatocellular carcinoma. She developed steatonecrosis with tenderness which occurred in the upper abdomen after TAE. The hepatic falciform artery from the middle hepatic artery was detected by arteriography. Necrosis in the upper abdomen was considered to be due to ischaemic changes caused by micromaterials for embolization of this artery, injuries of hepatic arterial endothelia slowly caused by carcinostatics, and chemotoxicity. It was considered that such complication as observed in this patient should be taken into consideration when performing TAE.
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Affiliation(s)
- T Umemura
- Department of Internal Medicine, Suwa Red Cross Hospital, Japan
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Suzuki K, Sawa Y, Kadoba K, Takahashi T, Ichikawa H, Kagisaki K, Ohata T, Matsuda H. Early detection of cardiac damage with heart fatty acid-binding protein after cardiac operations. Ann Thorac Surg 1998; 65:54-8. [PMID: 9456095 DOI: 10.1016/s0003-4975(97)01260-5] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.2] [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: 02/06/2023]
Abstract
BACKGROUND It is still difficult to evaluate myocardial damage in the acute phase of reperfusion in cardiac operations. We investigated the clinical significance of human heart fatty acid-binding protein (HH-FABP) for detecting myocardial damage after cardiac operations earlier than creatine kinase MB isoform or troponin-T. METHODS Blood samples from 20 patients who underwent coronary artery bypass grafting were collected serially after reperfusion to measure serum levels of creatine kinase-MB, troponin-T, and HH-FABP. RESULTS Serum HH-FABP levels peaked earliest after reperfusion. In addition, the maximum serum HH-FABP level was predictable immediately after reperfusion. The maximum serum HH-FABP level correlated with the maximum serum creatine kinase-MB or troponin-T level, as well as with the aortic cross-clamp time or the maximum dose of catecholamines administered after reperfusion. CONCLUSIONS Measurements of HH-FABP allow for earlier evaluation of myocardial damage in the acute phase of reperfusion. Human heart fatty acid-binding protein may be a useful indicator of myocardial damage after cardiac operations.
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Affiliation(s)
- K Suzuki
- First Department of Surgery, Osaka University, Suita, Japan
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Chang JC, Sawa Y, Ohtake S, Fukushima N, Nishimura M, Kagizaki K, Ohata T, Yamaguchi T, Matsuda H. Hemodynamic effect of inhaled nitric oxide in dilated cardiomyopathy patients on LVAD support. ASAIO J 1997; 43:M418-21. [PMID: 9360074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Recently it has been shown that inhaled nitric oxide (NO), which has been proven to contribute to improvement in critical pulmonary hypertension, may provide a favorable effect early after left ventricular assist device (LVAD) support. To improve right ventricular function, inhalation of NO was added to treatment with conventional catecholamines for four consecutive dilated cardiomyopathy (DCM) patients following institution of LVAD. In two patients 1 hr after inhalation of NO, central venous pressure (CVP), mean pulmonary arterial pressure (PAm), and pulmonary vascular resistance (PVR) were improved. These results led to better LVAD output and resulted in an adequate cardiac index. On the other hand, a right VAD (RVAD) was implemented in one patient whose high CVP, PAm, and PVR continued; he was weaned after 8 days of RVAD support. Another patient who had a high CVP but normal PAm and PVR before and after inhalation of NO had no improvement in his hemodynamic state. These data suggest that inhaled NO may improve systemic circulation by reducing right ventricular afterload and may become a promising and convenient therapy before placing RVAD in DCM patients under LVAD support. RVAD should be conducted in patients with right ventricular failure or when pulmonary hypertension is associated with impaired right ventricular reserve, even after inhalation of NO.
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Affiliation(s)
- J C Chang
- First Department of Surgery, Osaka University Medical School, Japan
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Nishimura M, Ohtake S, Sawa Y, Kadoba K, Masai T, Ichikawa H, Chang J, Kagisaki K, Ohata T, Yamaguchi T, Matsuda H. Portable cardiopulmonary support system as a bridge to left ventricular assist system implantation. A new strategy for the treatment of end stage cardiac disease. ASAIO J 1997; 43:M447-9. [PMID: 9360081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The key to the successful implantation of a left ventricular assist system (LVAS) for patients with end stage cardiac disease is whether the functions of other vital organs are irreversibly damaged or not. The portable cardiopulmonary support system (PCPS) is not only as convenient as, but is more powerful than, the intra-aortic balloon pump (IABP) in resuscitating impaired end organ function. To investigate the efficacy of PCPS in end stage cardiac disease, end organ function before and after the application of PCPS was retrospectively analyzed for end stage cardiac disease. From 1992 to 1996, five cardiomyopathy patients with deterioration in end organ function, despite application of IABP, underwent PCPS support before implantation of LVAS. Urine volume and levels of liver enzymes (sAST and sALT) and serum creatinine were determined before and after institution of PCPS. After the start of PCPS, the urine output increased significantly (1,840 +/- 450-4,340 +/- 470 ml/day, p < 0.01), and levels of sAST, sALT, and serum creatinine decreased significantly (630 +/- 220-150 +/- 50 IU/L, 630 +/- 260-260 +/- 130 IU/L, and 2.9 +/- 0.5-1.2 +/- 0.1 mg/dl, respectively; p < 0.05). All five patients were successfully bridged to LVAS implantation, and none died of multiple organ failure caused by pre-existing cardiac failure. These results indicate that PCPS before LVAS implantation is useful in resuscitating impaired end organ function and improving the survival rate with LVAS implantation for end stage cardiac disease.
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Affiliation(s)
- M Nishimura
- First Department of Surgery, Osaka University Medical School, Japan
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Ishikawa A, Fujiwara M, Ohata T, Wakata A, Hoshino K, Matsuzawa T, Barrow PC, Shimazu H, Ono C, Putman DL, San RH, Couch RC. Reproductive toxicity, mutagenicity and antigenicity of pamiteplase (genetical recombination). J Toxicol Sci 1997; 22:207-17. [PMID: 9279823 DOI: 10.2131/jts.22.3_207] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 02/05/2023]
Abstract
Pamiteplase (genetical recombination), YM866, is a novel recombinant modified human tissue-type plasminogen activator developed by Yamanouchi Pharmaceutical Co. Ltd., Tokyo, Japan. An intended route of administration in the clinical use of this drug is intravenous administration. We conducted an intravenous fertility and general reproduction studies of this drug in male and female rats and teratology study of this drug in rabbits at the dose levels of 0 (vehicle control), 0.1, 0.3 or 1 mg/kg/day. In the rat, no treatment-related abnormalities were observed up to the maximum dose in parental animals and their offspring. In the teratology study in rabbits, prolonged coagulation time at the injection site was observed at 0.3 mg/kg or more. One death and one abortion occurred at 1 mg/kg on days 22 and 23 of pregnancy, respectively. No toxic effects on the litters were observed up to the maximum dose. Results of evaluation of the mutagenicity of YM866 and its ability to induce chromosome aberrations using the L5178Y TK+/- mouse lymphoma assay, human lymphocyte chromosome aberration assay and the micronucleus assay in mice were negative. Evaluation of the immunogenicity of YM866 by repeated intravenous injection in chimpanzees elicited no confirmed antibody titers.
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Affiliation(s)
- A Ishikawa
- Medicinal Safety Laboratories, Yamanouchi Pharmaceutical Co., Ltd., Tokyo, Japan
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Kagisaki K, Masai T, Kadoba K, Sawa Y, Nomura F, Fukushima N, Ichikawa H, Ohata T, Suzuki K, Taketani S, Matsuda H. Biocompatibility of heparin-coated circuits in pediatric cardiopulmonary bypass. Artif Organs 1997; 21:836-40. [PMID: 9212969 DOI: 10.1111/j.1525-1594.1997.tb03753.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [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: 02/04/2023]
Abstract
In this study, we evaluated the biocompatibility of heparin-coated circuits in pediatric cardiopulmonary bypass (CPB). Eight patients were divided into 2 groups: the control group (Group C) and heparin-coated group (Group H). In Group H, CPB circuits, including the arterial pump, oxygenator, and cannulas were heparin-coated. Before, during, and after CPB, blood samples were obtained to assess the platelet counts (Plat), alpha 2-plasmin plasminogen inhibitor complex (PIC), thrombin-antithrombin III complex (TAT), C3 activation products (C3a), interleukin (IL)-6, IL-8, and polymorphonuclear neutrophil leukocyte (PMN) elastase. There was no significant difference in Plat, PIC, or TAT between groups. Group H showed significantly low levels of C3a (during and after CPB), PMN elastase (during CPB), and IL-6 (after CPB). These data demonstrated that in pediatric CPB, heparin-coated CPB circuits reduced the activation of complements and the production of PMN elastase and IL-6, suggesting the superior biocompatibility of the heparin-coated circuits.
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Affiliation(s)
- K Kagisaki
- First Department of Surgery, Osaka University Medical School, Japan
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39
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Sakae H, Aoyagi H, Oura M, Kimura H, Ohata T, Shiwaku H, Yamamoto S, Sugiyama H, Tanabe K, Kobaski K, Kitamura H. Diamond beam-position monitor for undulator radiation and tests at the Tristan Super Light Facility. J Synchrotron Radiat 1997; 4:204-9. [PMID: 16699231 DOI: 10.1107/s090904959700561x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A photon beam-position monitor using a diamond foil as a position-sensitive device has been developed for use on insertion-device beamlines of third-generation synchrotron radiation facilities such as SPring-8, and was tested on the undulator beamline of the Tristan Super Light Facility at KEK. The beam test results show that the diamond monitor can be operated in a photoconductive mode like a semiconductor detector. It has a linear working range of about +/-1 mm and a position sensitivity of less than 3 mum. The stability of the monitor was confirmed by continuous operation under low photon beam intensity conditions.
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Abstract
BACKGROUND Cardiopulmonary bypass (CPB) causes inflammatory reactions and abnormal responses of vascular resistance. Theoretically, the difference in the blood temperature during CPB may influence the degree of CPB-induced inflammatory reactions. METHODS To elucidate the effect of the perfusate temperature during CPB, serum levels of inflammatory cytokines, neutrophil elastase, complements, and vasoactive substances were measured in 18 patients undergoing elective coronary artery bypass grafting under tepid temperature (34 degrees C) and moderate hypothermia (28 degrees C). Respiratory index and systemic vascular resistance index during and after CPB and intubation time after postoperative course were also analyzed. RESULTS The patterns of the change in interleukin-8 and neutrophil elastase were significantly different between the two groups. The tepid group showed an earlier decrease in interleukin-8 and neutrophil elastase levels as compared with the hypothermic group. The prostaglandin E2 level just after CPB was significantly higher in the tepid group than in the hypothermic group. Systemic vascular resistance index and respiratory index and intubation time were significantly lower in the tepid group than in the hypothermic group. CONCLUSIONS These results demonstrated that tepid CPB affected the inflammatory cytokine release and neutrophil activation compared with hypothermic CPB, resulting in the attenuation of respiratory dysfunction. This may suggest a beneficial effect of tepid temperature in CPB with possible attenuation of the postperfusion syndrome.
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Affiliation(s)
- T Ohata
- First Department of Surgery, Osaka University Medical School, Japan
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41
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Ohuchi H, Nakagawa T, Yamamoto A, Araga A, Ohata T, Ishimaru Y, Yoshioka H, Kuwana T, Nohno T, Yamasaki M, Itoh N, Noji S. The mesenchymal factor, FGF10, initiates and maintains the outgrowth of the chick limb bud through interaction with FGF8, an apical ectodermal factor. Development 1997; 124:2235-44. [PMID: 9187149 DOI: 10.1242/dev.124.11.2235] [Citation(s) in RCA: 335] [Impact Index Per Article: 12.4] [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: 11/20/2022]
Abstract
Vertebrate limb formation has been known to be initiated by a factor(s) secreted from the lateral plate mesoderm. In this report, we provide evidence that a member of the fibroblast growth factor (FGF) family, FGF10, emanates from the prospective limb mesoderm to serve as an endogenous initiator for limb bud formation. Fgf10 expression in the prospective limb mesenchyme precedes Fgf8 expression in the nascent apical ectoderm. Ectopic application of FGF10 to the chick embryonic flank can induce Fgf8 expression in the adjacent ectoderm, resulting in the formation of an additional complete limb. Expression of Fgf10 persists in the mesenchyme of the established limb bud and appears to interact with Fgf8 in the apical ectoderm and Sonic hedgehog in the zone of polarizing activity. These results suggest that FGF10 is a key mesenchymal factor involved in the initial budding as well as the continuous outgrowth of vertebrate limbs.
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Affiliation(s)
- H Ohuchi
- Department of Biological Science and Technology, Faculty of Engineering, The University of Tokushima, Japan
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42
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Ishikawa A, Ohata T, Imamura K, Iwasaki M, Sakai T, Matsuzawa T, Okazaki S. Single and repeated intravenous toxicity studies of pamiteplase (genetical recombination) in rats and monkeys. J Toxicol Sci 1997; 22:117-33. [PMID: 9198009 DOI: 10.2131/jts.22.2_117] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 02/04/2023]
Abstract
Single and repeated intravenous toxicity studies of Pamiteplase (genetical recombination) YM866, a novel recombinant human tissue-type plasminogen activator, were conducted. No animal died from toxic effects of YM866 after single administration to F344 rats, squirrel monkeys and cynomolgus monkeys. Male and female F344 rats were given YM866 intravenously for 4 weeks at doses of 0 (vehicle), 0.1, 0.3 and 1 mg/kg/day. An increase in platelet count, slight decreases in hemoglobin and hematocrit, increases in plasma phospholipids, total cholesterol and total protein, and liver weight were observed at 1.0 mg/kg. Histopathology revealed no changes in any organ except for hemorrhage at the injection sites. These changes recovered after 4 weeks of withdrawal. Male and female squirrel monkeys were given YM866 intravenously for 4 weeks at doses of 0 (saline), 0 (vehicle), 0.1, 0.3 and 1 mg/kg/day. Prolongation of coagulation time at the injection site was observed at 0.3 mg/kg or more. Subcutaneous hemorrhage and a transient decrease in locomotor activity were observed at 1 mg/kg. Prolongation of coagulation time at the injection site was considered to be related to the pharmacological action of YM866. The results show that the approximate single lethal dose of YM866 is more than 60 mg/kg in rats, and more than 10 mg/kg in squirrel monkeys and cynomolgus monkeys. The no-toxic-effect level of YM866 after repeated administration for 4 weeks in rats and squirrel monkeys is considered to be 0.3 mg/kg.
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Affiliation(s)
- A Ishikawa
- Medicinal Safety Laboratories, Yamanouchi Pharmaceutical Co., Ltd., Tokyo, Japan
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43
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Takahashi M, Fukuda K, Ohata T, Sugimura T, Wakabayashi K. Increased expression of inducible and endothelial constitutive nitric oxide synthases in rat colon tumors induced by azoxymethane. Cancer Res 1997; 57:1233-7. [PMID: 9102204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Nitric oxide (NO) is an important bioregulatory mediator involved in a variety of biological processes under both physiological and pathological conditions. To assess whether NO production is altered in colon carcinogenesis, the expression levels and localization of two isoforms of NO synthase, inducible NO synthase (iNOS) and endothelial constitutive NO synthase (eNOS), were examined by immunoblot and immunohistochemical methods in normal colonic mucosa and colon carcinomas induced by azoxymethane in male F344 rats. All colon carcinoma tissues examined were found to have an increased expression of iNOS and eNOS proteins as compared to normal colonic mucosa. In particular, the pronounced staining of iNOS protein localized to the luminal surface of carcinoma epithelial cells was not detectable in normal colon epithelium. The neovasculature in tumor tissues also demonstrated intense eNOS immunoreactivity in endothelial cells. These findings indicate that NO production is markedly elevated in azoxymethane-induced rat colon carcinomas, suggesting that regulatory pathways involving this mediator have some biological relevance to colon carcinogenesis in this model.
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Affiliation(s)
- M Takahashi
- Cancer Prevention Division, National Cancer Center Research Institute, Chuo-ku, Tokyo, Japan
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Ohata T, Fukuda K, Takahashi M, Sugimura T, Wakabayashi K. Suppression of nitric oxide production in lipopolysaccharide-stimulated macrophage cells by omega 3 polyunsaturated fatty acids. Jpn J Cancer Res 1997; 88:234-7. [PMID: 9140106 PMCID: PMC5921376 DOI: 10.1111/j.1349-7006.1997.tb00372.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Although nitric oxide (NO) is an important biological mediator, its excessive production in inflammation is thought to be a causative factor for cellular injury and, over the long term, cancer. In the present study, the effects of several fatty acids on NO production in murine macrophage cell line RAW264 cells stimulated with lipopolysaccharide were examined. Suppression of NO production was observed with the omega 3 polyunsaturated fatty acids (PUFAs), docosahexaenoic acid, eicosapentaenoic acid and alpha-linolenic acid, in a dose-dependent fashion. In contrast, no inhibition was observed with omega 6 PUFA (linoleic acid), omega 9 PUFA (oleic acid) or a saturated fatty acid (stearic acid). Western and northern blot analyses suggested that suppression of the induction of inducible NO synthase gene expression is responsible for the inhibition of NO production by omega 3 PUFAs. The inhibitory effect of omega 3 PUFA on NO production in activated macrophages could contribute to their cancer chemopreventive influence.
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Affiliation(s)
- T Ohata
- Cancer Prevention Division, National Cancer Center Research Institute, Tokyo
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45
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Ohuchi H, Shibusawa M, Nakagawa T, Ohata T, Yoshioka H, Hirai Y, Nohno T, Noji S, Kondo N. A chick wingless mutation causes abnormality in maintenance of Fgf8 expression in the wing apical ridge, resulting in loss of the dorsoventral boundary. Mech Dev 1997; 62:3-13. [PMID: 9106162 DOI: 10.1016/s0925-4773(96)00634-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [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: 02/04/2023]
Abstract
We analyzed a Japanese chick wingless mutant (Jwg) to know a molecular mechanism underlying wing development. We observed expression patterns of eleven marker genes to characterize the mutant. Expressions of dorsoventral (DV) and mesenchymal marker genes were intact in nascent Jwg limb buds. However, expression of Fgf8, a marker gene for the apical ectodermal ridge (AER), was delayed and shortly disappeared in the wing regressing AER. Later on, ventral expression of dorsal marker genes of Wnt7a and Lmx1 indicated that the wing bud without the AER became bi-dorsal. In addition, the posterior mesoderm became defective, as deduced from the impaired expression patterns of Sonic hedgehog (Shh), Msx1, and Prx1. We attempted to rescue a wing by implanting Fgf8-expressing cells into the Jwg wing bud. We found that FGF8 can rescue outgrowth of the wing bud by maintaining Shh expression. Thus, the Jwg gene seems to be involved in maintenance of the Fgf8 expression in the wing bud. Further, it is suggested that the AER is required for maintenance of the DV boundary and the polarizing activity of the established wing bud.
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Affiliation(s)
- H Ohuchi
- Department of Biological Science and Technology, Faculty of Engineering, University of Tokushima, Japan
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Ohata T, Harada K, Tamura M, Ito T, Watanabe Y, Takada G. An infant case of Ebstein's anomaly of the tricuspid valve with abnormal diastolic filling pattern of the left ventricle. TOHOKU J EXP MED 1996; 179:205-11. [PMID: 8888509 DOI: 10.1620/tjem.179.205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [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: 02/02/2023]
Abstract
We report herein an infant case of Ebstein's anomaly with abnormal diastolic filling pattern of the left ventricle. We also compare the case with a comparable case without such abnormal filling pattern. The patient, who had pulmonary valve stenosis, patent ductus arteriosus and mild mitral regurgitation, underwent transventricular valvotomy at 30 days of age. Postoperative course was uneventful. Serial Doppler echocardiographic studies were performed at 2 hr, 40 days, and 52 days of age. Peak velocity and flow velocity-time integral of early diastole, and ratios of the peak velocities and velocity time integrals of the early diastole and atrial contraction were below the 95% confidence limits of the normal controls. Our case suggests that left ventricular diastolic dysfunction may exist in the Ebstein's anomaly when it is associated with mitral valve abnormality such as mitral regurgitation.
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Affiliation(s)
- T Ohata
- Department of Pediatrics, Akita University School of Medicine, Japan
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47
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Suzuki K, Sawa Y, Kadoba K, Ichikawa H, Kagisaki K, Ohata T, Asayama K, Ohkaru Y, Matsuda H. [The earlier detection of myocardial damage in open heart surgery using serum human heart fatty acid-binding protein]. Nihon Kyobu Geka Gakkai Zasshi 1996; 44:760-4. [PMID: 8753083] [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: 02/02/2023]
Abstract
Human heart fatty acid-binding protein (HH-FABP), which is a low molecular weight protein and abundant in the cytoplasm of myocardial cells, is reported to be released into the circulation shortly after the onset of acute myocardial damage. However, the changes in serum HH-FABP levels in open heart surgery have not been elucidated. To determine whether HH-FABP enables the earlier detection of myocardial damage caused by ischemia-reperfusion in open heart surgery, we measured the serial levels of serum HH-FABP, CK-MB and Troponin T (TnT) at every 15 min for 48 hours after reperfusion in 10 adult patients with coronary artery bypass graft. The serum HH-FABP levels reached the peak within 60 min after reperfusion (mean +/- SD; 49 +/- 7 min), and this was significantly (p < 0.001) earlier than CK-MB (212 +/- 108 min) and TnT (244 +/- 150 min). The peak value of serum HH-FABP had a significant correlation to the peak value of serum CK-MB or TnT (r = 0.815, p = 0.02; r = 0.925, p = 0.0001, respectively). These results indicate that serum HH-FABP enables the earlier detection of myocardial damage than the other markers in the patients with open heart surgery.
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Affiliation(s)
- K Suzuki
- First Department of Surgery, Osaka University, Japan
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48
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Sawa Y, Shimazaki Y, Kadoba K, Masai T, Fukuda H, Ohata T, Taniguchi K, Matsuda H. Attenuation of cardiopulmonary bypass-derived inflammatory reactions reduces myocardial reperfusion injury in cardiac operations. J Thorac Cardiovasc Surg 1996; 111:29-35. [PMID: 8551786 DOI: 10.1016/s0022-5223(96)70398-7] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.4] [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: 01/31/2023]
Abstract
In cardiac operations endopeptidase (protease) inhibitor may be beneficial in reducing myocardial injury when administered in the cardiopulmonary bypass prime. Nafamostat mesilate was evaluated in 20 patients who underwent coronary artery bypass grafting. The patients were divided into a control group (n = 10) and a nafamostat group (n = 10). Nafamostat (2 mg/kg per hour) was continuously given during cardiopulmonary bypass in the nafamostat group. The age, number of grafts, cardiopulmonary bypass time, and aortic crossclamp time were similar between groups. In the control group, neither tumor necrosis factor-alpha nor interleukin-1 levels showed any significant change during cardiopulmonary bypass, whereas interleukin-6 and interleukin-8 levels, percent expression of adhesion molecule (CD18) on neutrophils, and CH50 assay results increased significantly during cardiopulmonary bypass. As compared with the control group, the nafamostat group showed significantly lower levels of interleukin-6 (123 +/- 57 versus 40 +/- 22 pg/ml, respectively) and interleukin-8 (96 +/- 13 versus 66 +/- 14 pg/ml, respectively). The nafamostat group showed a significantly lower difference of CH50 assay results and malondialdehyde levels between coronary sinus blood and arterial blood and peak values of creatine kinase MB (43 +/- 12 IU/L versus 19 +/- 6 IU/L) during the postoperative course compared with findings in the control group. These results demonstrated that inflammatory reactions induced by cardiopulmonary bypass had adverse effects on myocardial recovery after aortic crossclamping and that nafamostat mesilate given during cardiopulmonary bypass appeared to reduce myocardial reperfusion injury by attenuating such inflammatory reactions. Attenuation of inflammatory reactions of cardiopulmonary bypass should be considered in the strategy of myocardial protection.
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Affiliation(s)
- Y Sawa
- First Department of Surgery, Osaka University Medical School, Japan
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49
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Aoki A, Suzuki H, Ohata T, Ohno S, Nagaoka S, Chiba J, Kanamaru T, Usuda Y. [A case of p-ANCA positive necrotizing vasculitis associated with Graves' disease]. Ryumachi 1995; 35:683-7. [PMID: 7482066] [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: 01/25/2023]
Abstract
A 22-year-old female who had been suffering from Graves' disease developed p-ANCA positive necrotizing vasculitis. Her Graves' disease has been treated with propylthiouracil (PTI) for 6 years, which failed to improve serum TSH. She developed transient and recurrent polyarthralgia 4 years before. Because of microscopic hematuria and polyarthralgia, She visited our hospital last year. She had hypergammaglobulinemia and microhematuria at that time. But no autoantibody was noted except anti-microsomal antibody at that time. Skin biopsy from her finger subdermal nodule revealed necrotizing vasculitis of small vessels. Serum p-ANCA was positive. She was admitted under the diagnosis of p-ANCA positive necrotizing vasculitis. Renal biopsy revealed mesangium proliferative glomerulonephritis. Since she developed telescoped sediments after admission, predonisolone (PSL) 50 mg daily was started. Clinical and laboratory findings improved quite well. PSL was gradually tapered after 6 weeks. She is being maintained in good condition on tapering doses of both PSL and PTI. The coincidence of Graves' disease and vasculitis is rare. This case may provide some important immunological insights into the study of pathogenesis of necrotizing vasculitis and Graves' disease.
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Affiliation(s)
- A Aoki
- Department of Internal Medicine, National Yokosuka Hospital
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Abstract
The neuroprotective properties of glutamate receptor antagonists arise from their ability to antagonize the excitotoxic actions of endogenous excitatory amino acids. However, J. W. Olney et al. (1989, Science 224: 1360-1362) have reported that MK-801, an N-methyl-D-aspartate (NMDA) glutamate receptor antagonist, induced morphological damage in neurons in the cerebral cortex of rats. YM90K is a potent alpha-amino-3-hydroxy-5-methylisoxazole propionic acid receptor antagonist which has high neuroprotective efficacy against delayed neuronal injury. The purpose of this study was to investigate whether YM90K induces a vacuolar reaction in the cytoplasm of neurons similar to that seen after the administration of MK-801. All experiments were performed on female F344 rats. YM90K was administered by iv infusion for 3 h at the dose of 40 mg/kg/h. MK-801 was given by single sc injection at the dose of 1 mg/kg. All rats receiving MK-801 showed neuronal vacuolation. The affected neurons were recognized as medium-sized pyramidal-shaped neurons which were distributed between layers II and IV in the posterior cingulate and retrosplenial neocortices. Most of these vacuoles contained multiple small and round structures that appeared to be remnants of mitochondria. Other vacuoles were recognized as enlarged sER or those present within the bilaminar nuclear membrane. MK-801 also induced heat shock protein immunoreactivity in the same neurons. In contrast, no such pathomorphological changes could be detected in the YM90K-treated rats.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- N Izumisawa
- Safety Research Laboratories, Yamanouchi Pharmaceutical Co., Ltd., Tokyo, Japan
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