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Matsuda K, Mitsuo H, Nishijima T, Uchiyama H, Nita T, Matsunaga S, Fujimoto N, Ushijima T, Ando Y, Kan-O M, Shinohara G, Kimura S, Sonoda H, Shiose A. Acute Dapagliflozin Administration Ameliorates Cardiac Surgery-Associated Acute Kidney Injury in a Rabbit Model. Circ J 2024:CJ-23-0864. [PMID: 38658352 DOI: 10.1253/circj.cj-23-0864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
BACKGROUND Several studies have shown that sodium-glucose cotransporter-2 inhibitors have a renoprotective effect on acute kidney injury (AKI), but their effect on cardiac surgery-associated AKI is unknown.Methods and Results: AKI was induced in 25 rabbits without diabetes mellitus by cardiopulmonary bypass (CPB) for 2 h and they were divided into 5 groups: sham; dapagliflozin-treated sham; CPB; dapagliflozin-treated CPB; and furosemide-treated CPB (n=5 in each group). Dapagliflozin was administered via the femoral vein before initiating CPB. Kidney tissue and urine and blood samples were collected after the surgical procedure. There were no differences in the hemodynamic variables of each group. Dapagliflozin reduced serum creatinine and blood urea nitrogen concentrations, and increased overall urine output (all P<0.05). Hematoxylin and eosin staining showed that the tubular injury score was improved after dapagliflozin administration (P<0.01). Dapagliflozin administration mitigated reactive oxygen species and kidney injury molecule-1 as assessed by immunohistochemistry (both P<0.0001). Protein expression analysis showed improvement of inflammatory cytokines and apoptosis, and antioxidant enzyme expression was elevated (all P<0.05) through activation of the nuclear factor erythroid 2-related factor 2 pathway (P<0.01) by dapagliflozin. CONCLUSIONS Acute intravenous administration of dapagliflozin protects against CPB-induced AKI. Dapagliflozin may have direct renoprotective effects in renal tubular cells.
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Affiliation(s)
- Kensaku Matsuda
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Hiroshi Mitsuo
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Takuya Nishijima
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Hikaru Uchiyama
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Tobuhiro Nita
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Shogo Matsunaga
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Noriko Fujimoto
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Tomoki Ushijima
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Yusuke Ando
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Meikun Kan-O
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Gen Shinohara
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Satoshi Kimura
- Advanced Aortic Therapeutics, Faculty of Medicine, Kyushu University Graduate School of Medicine
| | - Hiromichi Sonoda
- Department of Cardiovascular Surgery, Kyushu University Hospital
| | - Akira Shiose
- Department of Cardiovascular Surgery, Kyushu University Hospital
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Matsunaga S, Kohda A, Kamakura S, Hayase J, Miyano K, Shiose A, Sumimoto H. Hypoxia stabilizes the H 2 O 2 -producing oxidase Nox4 in cardiomyocytes via suppressing autophagy-related lysosomal degradation. Genes Cells 2024; 29:63-72. [PMID: 37985134 DOI: 10.1111/gtc.13085] [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: 10/23/2023] [Accepted: 11/08/2023] [Indexed: 11/22/2023]
Abstract
The hydrogen peroxide (H2 O2 )-producing NADPH oxidase Nox4, forming a heterodimer with p22phox , is expressed in a variety of cells including those in the heart to mediate adaptive responses to cellular stresses such as hypoxia. Since Nox4 is constitutively active, H2 O2 production is controlled by its protein abundance. Hypoxia-induced Nox4 expression is observed in various types of cells and generally thought to be regulated at the transcriptional level. Here we show that hypoxia upregulates the Nox4 protein level and Nox4-catalyzed H2 O2 production without increasing the Nox4 mRNA in rat H9c2 cardiomyocytes. In these cells, the Nox4 protein is stabilized under hypoxic conditions in a manner dependent on the presence of p22phox . Cell treatment with the proteasome inhibitor MG132 results in a marked decrease of the Nox4 protein under both normoxic and hypoxic conditions, indicating that the proteasome pathway does not play a major role in Nox4 degradation. The decrease is partially restored by the autophagy inhibitor 3-methyladenine. Furthermore, the Nox4 protein level is upregulated by the lysosome inhibitors bafilomycin A1 and chloroquine. Thus, in cardiomyocytes, Nox4 appears to be degraded via an autophagy-related pathway, and its suppression by hypoxia likely stabilizes Nox4, leading to upregulation of Nox4-catalyzed H2 O2 production.
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Affiliation(s)
- Shogo Matsunaga
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Akira Kohda
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Sachiko Kamakura
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Junya Hayase
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Kei Miyano
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Akira Shiose
- Department of Cardiovascular Surgery, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
| | - Hideki Sumimoto
- Department of Biochemistry, Kyushu University Graduate School of Medical Sciences, Fukuoka, Japan
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3
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Matsunaga S, Shimazawa K, Koura H, Fukagawa S. Consider, “Egg characteristics of Tsushima-jidori chickens”. J JPN SOC FOOD SCI 2022. [DOI: 10.3136/nskkk.69.499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Shogo Matsunaga
- Nagasaki Agriculture & Forestry Technical Development Centre
| | | | - Hanae Koura
- Livestock Division, Nagasaki Prefectural Government
| | - Satoru Fukagawa
- Nagasaki Agriculture & Forestry Technical Development Centre
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Matsunaga S, Ushijima T, Sonoda H, Shiose A. Redo Aortic Valve Replacement With Perceval Prosthesis via Minithoracotomy in a Patient With Permanent Tracheostoma and Tracheoesophageal Shunt. Innovations (Phila) 2022; 17:352-354. [PMID: 35786016 DOI: 10.1177/15569845221106758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A 76-year-old male patient had undergone aortic valve replacement with a 19-mm Carpentier-Edwards Perimount valve 12 years prior and underwent laryngopharyngo-esophagectomy for hypopharyngeal carcinoma followed by permanent tracheostomy and tracheoesophageal shunt creation 2 years later. Echocardiography showed exacerbated structural valve deterioration of the bioprosthesis, necessitating redo surgery. A permanent tracheostoma, located just above the upper edge of the sternum, seemed to be at high risk of serious infections when median resternotomy was performed. To minimize the risk of infection, we performed implantation of a Perceval prosthesis via the right anterior minithoracotomy after sufficient anatomical assessments. There was no evidence of mediastinitis or wound infection during the follow-up period. This report highlights that the less invasive Perceval implantation strategically allowed reduction in the resternotomy-associated infection risks in this patient.
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Affiliation(s)
- Shogo Matsunaga
- Department of Cardiovascular Surgery, 145181Kyushu University Hospital, Fukuoka, Japan
| | - Tomoki Ushijima
- Department of Cardiovascular Surgery, 145181Kyushu University Hospital, Fukuoka, Japan
| | - Hiromichi Sonoda
- Department of Cardiovascular Surgery, 145181Kyushu University Hospital, Fukuoka, Japan
| | - Akira Shiose
- Department of Cardiovascular Surgery, 145181Kyushu University Hospital, Fukuoka, Japan
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5
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Tasaka A, Okano H, Odaka K, Matsunaga S, K Goto T, Abe S, Yamashita S. Comparison of artificial tooth position in dentures fabricated by heat curing and additive manufacturing. Aust Dent J 2021; 66:182-187. [PMID: 33411950 DOI: 10.1111/adj.12817] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2021] [Indexed: 01/12/2023]
Abstract
BACKGROUND The purpose of this study was to compare the displacement of tooth arrangement in dentures fabricated by additive manufacturing (AM) and heat curing. METHODS Three-dimensional (3D) scanning was performed for edentulous jaw models. After the teeth were arranged, 3D scanning for the wax denture was performed. Heat-cured dentures were fabricated with heat-cure polymer resin. Based on data obtained by subtracting the model data from wax denture data, AM dentures were fabricated from ultraviolet-cured acrylic resin. Accuracy was verified by superimposing heat-cured and AM dentures on the tooth region data from the wax dentures and measuring displacement of the tooth arrangement. RESULTS In the maxillary dentures, the amount of tooth displacement for the heat-cured dentures and for the AM dentures ranged from -0.08 to +0.06 mm and from -0.25 to +0.06 mm respectively. A significant difference was observed between two dentures. In the mandibular dentures, the amount of tooth displacement for the heat-cured dentures and for the AM dentures ranged from -0.09 to +0.07 mm and from -0.03 to +0.07 mm respectively. No significant difference was observed between two dentures. CONCLUSIONS The artificial teeth of the maxillary dentures fabricated by AM showed a greater displacement compared to those by heat curing.
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Affiliation(s)
- A Tasaka
- Department of Removable Partial Prosthodontics, Tokyo Dental College, Tokyo, Japan.,Oral Health Science Center, Tokyo Dental College, Tokyo, Japan
| | - H Okano
- Department of Removable Partial Prosthodontics, Tokyo Dental College, Tokyo, Japan
| | - K Odaka
- Oral Health Science Center, Tokyo Dental College, Tokyo, Japan.,Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - S Matsunaga
- Oral Health Science Center, Tokyo Dental College, Tokyo, Japan.,Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | - T K Goto
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - S Abe
- Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | - S Yamashita
- Department of Removable Partial Prosthodontics, Tokyo Dental College, Tokyo, Japan
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6
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Koyachi M, Sugahara K, Odaka K, Matsunaga S, Abe S, Sugimoto M, Katakura A. Accuracy of Le Fort I osteotomy with combined computer-aided design/computer-aided manufacturing technology and mixed reality. Int J Oral Maxillofac Surg 2020; 50:782-790. [PMID: 33158695 DOI: 10.1016/j.ijom.2020.09.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 09/28/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
Abstract
The aim of this study was to verify the reproducibility and accuracy of preoperative planning in maxilla repositioning surgery performed with the use of computer-aided design/manufacturing technologies and mixed reality surgical navigation, using new registration markers and the HoloLens headset. Eighteen patients with a mean age of 26.0 years were included. Postoperative evaluations were conducted by comparing the preoperative virtual operation three-dimensional image (Tv) with the 1-month postoperative computed tomography image (T1). The three-dimensional surface analysis errors ranged from 79.9% to 97.1%, with an average error of 90.3%. In the point-based analysis, the errors at each point on the XYZ axes were calculated for Tv and T1 in all cases. The median signed value deviation of all calculated points on the XYZ axes was -0.03mm (range -2.93mm to 3.93mm). The median absolute value deviation of all calculated points on the XYZ axes was 0.38mm (range 0mm to 3.93mm). There were no statistically significant differences between any of the points on any of the axes. These values indicate that the method used was able to reproduce the maxilla position with high accuracy.
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Affiliation(s)
- M Koyachi
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan.
| | - K Sugahara
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan; Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan
| | - K Odaka
- Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Tokyo, Japan
| | - S Matsunaga
- Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan; Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | - S Abe
- Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan; Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | - M Sugimoto
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan; Okinaga Research Institute Innovation Laboratory, Teikyo University, Tokyo, Japan
| | - A Katakura
- Department of Oral Pathobiological Science and Surgery, Tokyo Dental College, Tokyo, Japan; Oral Health Science Centre, Tokyo Dental College, Tokyo, Japan
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7
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Kodama S, Fujihara K, Horikawa C, Harada M, Ishiguro H, Kaneko M, Furukawa K, Matsubayashi Y, Matsunaga S, Shimano H, Tanaka S, Kato K, Sone H. Network meta-analysis of the relative efficacy of bariatric surgeries for diabetes remission. Obes Rev 2018; 19:1621-1629. [PMID: 30270528 DOI: 10.1111/obr.12751] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Revised: 07/05/2018] [Accepted: 07/11/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND Bariatric surgery leads to a higher remission rate for type 2 diabetes mellitus than non-surgical treatment. However, it remains unsolved which surgical procedure is the most efficacious. This network meta-analysis aimed to rank surgical procedures in terms of diabetes remission. METHODS AND FINDINGS We electronically searched for randomized controlled trials in which at least one surgical treatment was included among multiple arms and the diabetes remission rate was included in study outcomes. A random-effects network meta-analysis was performed within a frequentist framework. The hierarchy of treatments was expressed as the surface under the cumulative ranking curve value. Results of the analysis of 25 eligible randomized controlled trials that covered non-surgical treatments and eight surgical procedures (biliopancreatic diversion [BPD], BPD with duodenal switch, Roux-en Y gastric bypass, mini gastric bypass [mini-GBP], laparoscopic adjustable gastric banding, laparoscopic sleeve gastrectomy, greater curvature plication and duodenal-jejunal bypass) showed that BPD and mini-GBP had the highest surface under the cumulative ranking curve values among the eight surgical treatments. CONCLUSION Current network meta-analysis indicated that BPD or mini-GBP achieved higher diabetes remission rates than the other procedures. However, the result needs to be interpreted with caution considering that these procedures were in the minority of bariatric surgeries.
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Affiliation(s)
- S Kodama
- Department of Laboratory Medicine and Clinical Epidemiology for Prevention of Noncommunicable Diseases, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - K Fujihara
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - C Horikawa
- Department of Health and Nutrition, Faculty of Human Life Studies, University of Niigata Prefecture, Niigata, Japan
| | - M Harada
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - H Ishiguro
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - M Kaneko
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - K Furukawa
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - Y Matsubayashi
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - S Matsunaga
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
| | - H Shimano
- Department of Internal Medicine, University of Tsukuba Institute of Clinical Medicine, Tsukuba, Japan
| | - S Tanaka
- Department of Clinical Trial, Design and Management, Translational Research Center, Kyoto University Hospital, Kyoto, Japan
| | - K Kato
- Department of Laboratory Medicine and Clinical Epidemiology for Prevention of Noncommunicable Diseases, Niigata University Graduate School of Medical and Dental Sciences, Niigata, Japan
| | - H Sone
- Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
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Fujihara K, Matsubayashi Y, Yamamoto M, Osawa T, Ishizawa M, Kaneko M, Matsunaga S, Kato K, Seida H, Yamanaka N, Kodama S, Sone H. Impact of body mass index and metabolic phenotypes on coronary artery disease according to glucose tolerance status. Diabetes Metab 2017; 43:543-546. [PMID: 28918195 DOI: 10.1016/j.diabet.2017.08.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 07/27/2017] [Accepted: 08/13/2017] [Indexed: 12/26/2022]
Abstract
OBJECTIVE This study aimed to examine the impact of obesity, as defined by body mass index (BMI), and a metabolically unhealthy phenotype on the development of coronary artery disease (CAD) according to glucose tolerance status. METHODS . Metabolically unhealthy individuals were defined as those with one or more of the following conditions: hypertension, hypertriglyceridaemia and/or low HDL cholesterol. A Cox proportional hazards regression model identified variables related to CAD incidence. RESULTS The prevalences of obese subjects with normal glucose tolerance, prediabetes and diabetes were 21%, 34% and 53%, whereas those for metabolically unhealthy people were 43%, 60% and 79%, respectively. Multivariate analysis showed that a metabolically unhealthy phenotype increases hazard ratios (HRs) for CAD compared with a metabolically healthy phenotype, regardless of glucose tolerance status (normal glucose tolerance: 1.98, 95% CI: 1.32-2.95; prediabetes: 2.91, 95% CI: 1.85-4.55; diabetes: 1.90, 95% CI: 1.18-3.06). HRs for CAD among metabolically unhealthy non-obese diabetes patients and obese diabetes patients with a metabolically unhealthy status were 6.14 (95% CI: 3.94-9.56) and 7.86 (95% CI: 5.21-11.9), respectively, compared with non-obese subjects with normal glucose tolerance and without a metabolically unhealthy status. CONCLUSION A metabolically unhealthy state can associate with CAD independently of obesity across all glucose tolerance stages. Clinicians may need to consider those with at least one or more conditions indicating a metabolically unhealthy state as being at high risk for CAD regardless of glucose tolerance status.
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Affiliation(s)
- K Fujihara
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - Y Matsubayashi
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - M Yamamoto
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - T Osawa
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - M Ishizawa
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - M Kaneko
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - S Matsunaga
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - K Kato
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - H Seida
- Japan Medical Data Center Co., Ltd., 2-5-5, Shibadaimon, 105-0012 Tokyo, Japan
| | - N Yamanaka
- Japan Medical Data Center Co., Ltd., 2-5-5, Shibadaimon, 105-0012 Tokyo, Japan
| | - S Kodama
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan
| | - H Sone
- Department of Internal Medicine, Niigata University Faculty of Medicine, 1-757, Asahimachi, 951-8510 Niigata, Japan.
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Tanaka S, Kawasaki R, Tanaka-Mizuno S, Iimuro S, Matsunaga S, Moriya T, Ishibashi S, Katayama S, Ohashi Y, Akanuma Y, Sone H, Yamashita H. Severe hypoglycaemia is a major predictor of incident diabetic retinopathy in Japanese patients with type 2 diabetes. Diabetes Metab 2017; 43:424-429. [PMID: 28720342 DOI: 10.1016/j.diabet.2017.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Revised: 06/14/2017] [Accepted: 06/14/2017] [Indexed: 12/16/2022]
Abstract
AIM Hypoglycaemia is a common complication in diabetes patients. However, its relationship with retinopathy has not been well documented in patients with type 2 diabetes (T2D). This study aimed to investigate the associations between hypoglycaemia and the incidence and progression of diabetic retinopathy (DR). METHODS In this longitudinal cohort study, which was part of the Japan Diabetes Complications Study (JDCS), adult patients with T2D were recruited at 59 diabetes clinics across Japan. Their history of hypoglycaemia was assessed by standardized self-reported questionnaires. Severe hypoglycaemia was defined as having at least one episode with coma requiring an outpatients visit or hospitalization. Adjusted hazard ratios (HRs) for incidence and progression of DR over 8 years of follow-up were determined. RESULTS Of 1221 patients without DR, 127 (10.4%) had experienced non-severe hypoglycaemia within the previous year, whereas 10 (0.8%) reported severe hypoglycaemia episodes. During the 8-year follow-up involving 8492 person-years, 329 patients developed DR. In 410 patients with prevalent DR, the adjusted HRs for incident DR were 4.35 (95% CI: 1.98-9.56; P<0.01) and, for progression of DR, 2.29 (95% CI: 0.45-11.78; P=0.32) with severe hypoglycaemia. CONCLUSION Having a history of severe hypoglycaemia was one of the strongest predictors of incident DR in patients with T2D, with a fourfold increased risk. Identifying patients with greater risks of DR based on their history of hypoglycaemia may help to personalize risk evaluation in patients with diabetes.
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Affiliation(s)
- S Tanaka
- Department of pharmacoepidemiology, graduate longitudinal school of medicine and public health, Kyoto university, Yoshida-Konoe-cho, Sakyo-ku, Kyoto, Japan
| | - R Kawasaki
- Department of public health, Yamagata university graduate school of medical science, 2-2-2 Iida-Nishi, Yamagata, Japan.
| | - S Tanaka-Mizuno
- Division of medical statistics, Shiga university of medical science, Tsukinowa Seta-cho, Ohtsu, Shiga, Japan
| | - S Iimuro
- Teikyo academic research centre, Teikyo university, Kaga, Itabashi-ku, Tokyo, Japan
| | - S Matsunaga
- Department of haematology, endocrinology and metabolism, faculty of medicine, Niigata university, 1-757 Asahi-machi, Chuo-ku, Niigata, Japan
| | - T Moriya
- Health care centre, Kitasato university, 1-15-1 Kitasato, Minami-ku, Sagamihara-shi, Kanagawa, Japan
| | - S Ishibashi
- Division of endocrinology and metabolism, school of medicine, Jichi medical university, 3311-1 Yakushiji, Shimotsuke, Tochigi, Japan
| | - S Katayama
- Kawagoe clinic, Saitama medical university, 21-7 Wakitahonchou, Kawagoe, Saitama, Japan
| | - Y Ohashi
- Department of integrated science and engineering for sustainable society, Chuo university, 1-13-27, Kasuga, Bunkyo-ku, Tokyo, Japan
| | - Y Akanuma
- The institute for adult diseases Asahi life foundation, 1-6-1 Marunouchi Chiyoda-ku, Tokyo, Japan
| | - H Sone
- Department of haematology, endocrinology and metabolism, faculty of medicine, Niigata university, 1-757 Asahi-machi, Chuo-ku, Niigata, Japan
| | - H Yamashita
- Department of ophthalmology and visual sciences, school of medicine, Yamagata university, 2-2-2 Iida-Nishi, Yamagata, Japan
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Fujihara K, Igarashi R, Yamamoto M, Ishizawa M, Matsubayasi Y, Matsunaga S, Kato K, Ito C, Koishi M, Yamanaka N, Kodama S, Sone H. Impact of glucose tolerance status on the development of coronary artery disease among working-age men. Diabetes & Metabolism 2017; 43:261-264. [DOI: 10.1016/j.diabet.2016.09.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 08/24/2016] [Accepted: 09/06/2016] [Indexed: 10/20/2022]
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11
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Motomatsu Y, Oishi Y, Matsunaga S, Onitsuka H, Yamamoto H, Zaitsu E, Yamada Y, Kohashi K, Oda Y, Tominaga R. Primary Cardiac T-Cell Lymphoma Localized in the Mitral Valve. Ann Thorac Surg 2017; 101:2363-5. [PMID: 27211945 DOI: 10.1016/j.athoracsur.2015.08.091] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 06/24/2015] [Accepted: 08/21/2015] [Indexed: 11/16/2022]
Abstract
Primary cardiac lymphoma is a rare cardiac tumor, and usually originates from B cells and involves the right side of the heart. We present an extremely rare case of primary cardiac T-cell lymphoma involving the mitral valve alone. A 58-year-old woman who was positive for human T-cell leukemia virus 1 underwent mitral valve replacement because of severe mitral regurgitation. The postoperative pathologic diagnosis of the mitral valve was T-cell lymphoma. Further evaluation revealed no malignancy, except for the mitral valve. To the best of our knowledge, this is the first case of primary cardiac T-cell lymphoma localized in the mitral valve.
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Affiliation(s)
- Yuma Motomatsu
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Yasuhisa Oishi
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan.
| | - Shogo Matsunaga
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Hirofumi Onitsuka
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Hidetaka Yamamoto
- Department of Anatomic Pathology, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Eiko Zaitsu
- Department of Anatomic Pathology, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Yuichi Yamada
- Department of Anatomic Pathology, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Kenichi Kohashi
- Department of Anatomic Pathology, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Yoshinao Oda
- Department of Anatomic Pathology, Graduate School of Medical Science, Kyushu University, Fukuoka, Japan
| | - Ryuji Tominaga
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
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Motomatsu Y, Oishi Y, Matsunaga S, Tominaga R. Endovascular aortic repair immediately after open stent-grafting: collapse of the endograft. Eur J Cardiothorac Surg 2017; 51:390-392. [PMID: 28186274 DOI: 10.1093/ejcts/ezw278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/10/2016] [Accepted: 07/13/2016] [Indexed: 11/12/2022] Open
Affiliation(s)
- Yuma Motomatsu
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Yasuhisa Oishi
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Shogo Matsunaga
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
| | - Ryuji Tominaga
- Department of Cardiovascular Surgery, Kyushu University Hospital, Fukuoka, Japan
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Matsui Y, Matsunaga S, Matsuda Y, Kishi T, Iwata N. Azapirones for Attention Deficit Hyperactivity Disorder: A Systematic Review. Pharmacopsychiatry 2016; 49:97-106. [PMID: 27074948 DOI: 10.1055/s-0042-102457] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
INTRODUCTION No meta-analysis has evaluated azapirones (serotonin1A receptor partial agonists) as anxiolytics for attention deficit hyperactivity disorder (ADHD). METHODS Randomized controlled trials (RCTs) and single-arm trials published before October 27, 2015 were retrieved from major healthcare databases and clinical trial registries. Relative risk and 95% confidence intervals were calculated. RESULTS 5 RCTs (n=429) and 3 single-arm studies (n=70) were identified. 3 RCTs compared buspirone vs. methylphenidate in children/adolescents, one buspirone patches vs. placebo patches in children/adolescents, and one atomoxetine plus buspirone vs. atomoxetine vs. placebo in adults. The single-arm studies were buspirone trails in children/adolescents. All-cause discontinuation rates and adverse events did not differ between pooled buspirone and methylphenidate groups. No other meta-analyses of buspirone efficacy and safety vs. comparators were conducted due to insufficient data. 2 RCTs found no significant differences in parent and teacher ADHD-Rating Scale total scores between buspirone and methylphenidate, while one reported that methylphenidate improved parent and teacher ADHD-RS total scores vs. buspirone. DISCUSSION It remains unclear whether buspirone use has benefit for ADHD patients and therefore further evidence is needed for better clinical use of buspirone in patients with ADHD.
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Affiliation(s)
- Y Matsui
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
| | - S Matsunaga
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
| | - Y Matsuda
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
| | - T Kishi
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
| | - N Iwata
- Department of Psychiatry, Fujita Health University School of Medicine, Toyoake, Japan
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Kodama S, Horikawa C, Fujihara K, Yoshizawa S, Yachi Y, Tanaka S, Ohara N, Matsunaga S, Yamada T, Hanyu O, Sone H. Quantitative relationship between body weight gain in adulthood and incident type 2 diabetes: a meta-analysis. Obes Rev 2014; 15:202-14. [PMID: 24165305 DOI: 10.1111/obr.12129] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/07/2013] [Accepted: 09/19/2013] [Indexed: 01/11/2023]
Abstract
This meta-analysis quantified the risk of type 2 diabetes mellitus (T2DM) preceded by body weight (BW) gain in the general population. Systematic literature searches retrieved 15 eligible studies. The BW gain was divided into early weight-gain, which was defined as BW gain from early adulthood (18-24 years of age) to cohort entry (≥25 years of age), and late weight-gain, which was defined as BW gain from cohort entry. The pooled relative risk (RR; 95% confidence interval [CI]) of T2DM for an increment of BW gain standardized into a 5-kg m(-2) increment in the body mass index (BMI) was 3.07 (2.49-2.79) for early weight-gain and 2.12 (1.74-2.58) for late weight-gain. When limiting analysis to studies that concurrently examined T2DM risk for current BMI (defined in both groups as BMI at cohort entry), a larger magnitude of T2DM risk was revealed for early weight-gain compared with current BMI (RR [95% CI], 3.38 [2.20-5.18] vs. 2.39 [1.58-3.62]), while there was little difference between late weight-gain (RR [95% CI], 2.21 [1.91-2.56]) and current BMI (RR [95% CI], 2.47 [1.97-3.30]). The meta-analysis suggested that BW gain was a quantifiable predictor of T2DM, as well as current obesity in adults. Particularly, BW gain in early rather than middle-to-late adulthood played an important role in developing T2DM.
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Affiliation(s)
- S Kodama
- Department of Health Management Center, Mito Kyodo General Hospital, Ibaraki, Japan; Department of Internal Medicine, Niigata University Faculty of Medicine, Niigata, Japan
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15
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Matsunaga S, Azuma K, Watanabe M, Tsuka T, Imagawa T, Osaki T, Okamoto Y. Onion peel tea ameliorates obesity and affects blood parameters in a mouse model of high-fat-diet-induced obesity. Exp Ther Med 2013; 7:379-382. [PMID: 24396409 PMCID: PMC3881067 DOI: 10.3892/etm.2013.1433] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 10/24/2013] [Indexed: 11/24/2022] Open
Abstract
The present study examined the effects of onion peel tea (OPT) in a mouse model of high-fat-diet-induced obesity. BALB/c mice were fed a high-fat diet for three weeks, followed by a normal diet with or without OPT for 28 days. OPT suppressed the increases in body weight and level of epididymal fat tissue; it also significantly reduced the serum concentrations of total cholesterol on day 14 and those of glucose and leptin on day 28. The results indicate that OPT has anti-obesity effects in an experimental mouse model of high-fat-diet-induced obesity.
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Affiliation(s)
- Shogo Matsunaga
- Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Kazuo Azuma
- Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | | | - Takeshi Tsuka
- Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Imagawa
- Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
| | - Tomohiro Osaki
- Faculty of Agriculture, Tottori University, Tottori 680-8553, Japan
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16
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Ma JL, Shi SZ, Ide Y, Saka H, Matsunaga S, Agematsu H. Volume measurement of crowns in mandibular primary central incisors by micro-computed tomography. Acta Odontol Scand 2013; 71:1032-7. [PMID: 23745971 DOI: 10.3109/00016357.2012.698306] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 11/13/2022]
Abstract
OBJECTIVE To determine sex differences in the tissue proportions of crowns of mandibular primary central incisors in Chinese children and to quantify the volume of crown components in three dimensions using micro-computed tomography (micro-CT). MATERIALS AND METHODS The specimens used in this study were 41 mandibular first deciduous incisor teeth with intact crowns (21 males and 20 females) obtained from patients between 5-6 years of age. Each specimen was scanned using micro-CT at a resolution of 0.05 mm and 3D-rendered images were created. The volume of each component of the crown was measured and examined for differences in different sex and ages. RESULTS The pulp chamber volume decreased with age and the volume ratio of the pulp chamber to the whole crown was significantly smaller in 6-year-olds than in 5-year-olds (p < 0.05). CONCLUSIONS Males had significantly larger tooth crown volumes and dentin volumes than females did (p < 0.001), while the volume of enamel showed no sexual dimorphism.
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Affiliation(s)
- Jin-Lan Ma
- Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, PR China
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17
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Equilibrina I, Matsunaga S, Morimoto A, Hashimoto T, Uchiyama S, Fukui K. ASURA (PHB2) interacts with Scc1 through chromatin. Cytogenet Genome Res 2013; 139:225-33. [PMID: 23548868 DOI: 10.1159/000350004] [Citation(s) in RCA: 2] [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] [Accepted: 10/18/2012] [Indexed: 11/19/2022] Open
Abstract
Sister chromatid cohesion mediated by the cohesin complex is essential for faithful chromosome segregation. Previously we reported that PHB2 (prohibitin2/ASURA), a multifunctional protein, has a role in sister chromatid cohesion. Nevertheless, how ASURA is involved in sister chromatid cohesion still remains unclear. The present co-immunoprecipitation analysis reveals that ASURA interacts with cohesin subunit Scc1 in vivo. We show that ASURA associates with chromatin in a similar manner as Scc1 throughout the cell cycle. Furthermore, our observation using the Fucci (fluorescent ubiquitination-based cell cycle indicator) system indicates that ASURA is important for cohesin maintenance at early mitosis. We have also identified that the conserved PHB domain is responsible for chromatin targeting of ASURA. Our results suggest that the regulation of sister chromatid cohesion is mediated by ASURA binding to chromatin, where ASURA might be involved in cohesin protection through ASURA-Scc1 interactions.
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Affiliation(s)
- I Equilibrina
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
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18
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Matsumura H, Murayama Y, Ono Y, Matsunaga S, Nagai T, Takai Y, Saito M, Takagi K, Baba K, Seki H. M472 SUCCESSFUL USE OF ABSORBABLE SYNTHETIC SUTURE MATERIAL (PDSII) FOR CERVICAL INSUFFICIENCY. Int J Gynaecol Obstet 2012. [DOI: 10.1016/s0020-7292(12)61660-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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19
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Kumon A, Kaneko E, Saito F, Kato M, Matsunaga S, Kawashima N, Hasegawa K. 1.047 NEW OBJECTIVE APATHY SCALE FOR PARKINSON'S DISEASE. Parkinsonism Relat Disord 2012. [DOI: 10.1016/s1353-8020(11)70161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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Matsunaga S, Osawa T, Geshi M, Takahashi H, Inumaru S, Yokomizo Y, Miyake YI. Effect of a single intrauterine administration of recombinant bovine interferon-τ on day 7 of the estrous cycle on the luteal phase length and blood profile in dairy cows. Res Vet Sci 2011; 93:381-5. [PMID: 21652051 DOI: 10.1016/j.rvsc.2011.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 03/07/2011] [Accepted: 05/12/2011] [Indexed: 10/18/2022]
Abstract
This study tested the effect of recombinant bovine interferon-tau (rboIFN-τ) on the length of estrous cycle, luteal lifespan and side effects of rboIFN-τ in the cow. A normal estrous cycle in six non-lactating cycling Holstein cows was observed (non-treated cycle), and either 2.0 mg of liposomalized rboIFN-τ (treated cycle) or bovine serum albumin (BSA; placebo cycle) was infused in the uterus on day 7 of the estrous cycle (day 0=day of ovulation). Rectal temperature, heart rate and respiratory rate were recorded and blood samples were collected before and after the treatments. The length of the estrous cycle and corpus luteum lifespan in rboIFN-τ treated cycles were not significantly different from those of the non-treated and placebo cycles. In contrast, the rboIFN-τ treatment caused a transient increase in rectal temperature and a decrease in the number of peripheral lymphocytes and neutrophils after the treatment.
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Affiliation(s)
- S Matsunaga
- Laboratory of Theriogenology, Department of Veterinary Medicine, Faculty of Agriculture, Iwate University, Ueda 3-18-8, Morioka 020-8550, Japan
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21
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Nibe K, Miwa Y, Matsunaga S, Chambers JK, Uetsuka K, Nakayama H, Uchida K. Clinical and pathologic features of neuronal ceroid-lipofuscinosis in a ferret (Mustela putorius furo). Vet Pathol 2011; 48:1185-9. [PMID: 21383119 DOI: 10.1177/0300985811400441] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Clinical and pathologic features of neuronal ceroid-lipofuscinosis in a 4-month-old ferret are reported. Clinical signs including neurological symptoms appeared at 3 months of age and progressed rapidly. By magnetic resonance imaging, severe cerebral atrophy was recognized. Histopathologically, there was severe neuronal loss and diffuse astrogliosis with macrophage accumulations; lesions were found predominantly in the cerebral cortex. Intracytoplasmic pigments were observed in surviving neurons and macrophages throughout the brain. The pigments were intensely positive for periodic acid-Schiff, Luxol fast blue, and Sudan black B and exhibited a green autofluorescence. Electron microscopic examination revealed the accumulation of electron-dense granular material within lysosomes of neurons and macrophages. Immunohistochemically, a large number of saposin-positive granules accumulated in the neuronal cells, astrocytes, and macrophages of the lesions, but significant immunoreactivity for subunit c of mitochondrial adenosine triphosphate synthase was not observed. Based on these findings, the animal was diagnosed as affected by neuronal ceroid-lipofuscinosis.
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Affiliation(s)
- K Nibe
- Faculty of Agriculture, Miyazaki University, Miyazaki, Japan
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22
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Shuto T, Suenaga J, Matsunaga S, Yoshidumi T, Tuzuki S, Otake M. [Treatment of glioblastoma by gamma knife radiosurgery]. Gan To Kagaku Ryoho 2010; 37:1024-1026. [PMID: 20597194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- Takashi Shuto
- Department of Neurosurgery, Yokohama Rosai Hospital, 3211 Kozukue-cho, Kouhoku-ku, Yokohama, Kanagawa, Japan
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Kataoka J, Toizumi T, Nakamori T, Yatsu Y, Tsubuku Y, Kuramoto Y, Enomoto T, Usui R, Kawai N, Ashida H, Omagari K, Fujihashi K, Inagawa S, Miura Y, Konda Y, Miyashita N, Matsunaga S, Ishikawa Y, Matsunaga Y, Kawabata N. In-orbit performance of avalanche photodiode as radiation detector on board the picosatellite Cute-1.7+APD II. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009ja014699] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [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)
- J. Kataoka
- Research Institute for Science and Engineering; Waseda University; Tokyo Japan
| | - T. Toizumi
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - T. Nakamori
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Yatsu
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Tsubuku
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Kuramoto
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - T. Enomoto
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - R. Usui
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - N. Kawai
- Laboratory for Experimental Astrophysics, Department of Physics; Tokyo Institute of Technology; Tokyo Japan
| | - H. Ashida
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - K. Omagari
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - K. Fujihashi
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - S. Inagawa
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Miura
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Konda
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - N. Miyashita
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - S. Matsunaga
- Laboratory for Space Systems, Department of Mechanical and Aerospace Engineering; Tokyo Institute of Technology; Tokyo Japan
| | - Y. Ishikawa
- Solid State Division; Hamamatsu Photonics K.K.; Hamamatsu Japan
| | - Y. Matsunaga
- Solid State Division; Hamamatsu Photonics K.K.; Hamamatsu Japan
| | - N. Kawabata
- Solid State Division; Hamamatsu Photonics K.K.; Hamamatsu Japan
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Mishima T, Kuratani M, Kanzaki K, Yamada T, Matsunaga S, Wada M. No relationship between enzyme activity and structure of nucleotide binding site in sarcoplasmic reticulum Ca(2+)-ATPase from short-term stimulated rat muscle. Acta Physiol (Oxf) 2009; 196:401-9. [PMID: 19302261 DOI: 10.1111/j.1748-1716.2009.01986.x] [Citation(s) in RCA: 3] [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: 11/30/2022]
Abstract
AIM We examined whether structural alterations to the adenine nucleotide binding site (ANBS) within sarcoplasmic (endo) reticulum Ca(2+)-ATPase (SERCA) would account for contraction-induced changes in the catalytic activity of the enzyme as assessed in vitro. METHODS Repetitive contractions were induced in rat gastrocnemius by electrical nerve stimulation. Measurements of sarcoplasmic reticulum properties were performed on control and stimulated muscles immediately after or at 30 min after the cessation of 5-min stimulation. In order to examine the properties at the ANBS, the binding capacity of SERCA to fluorescence isothiocyanate (FITC), a competitive inhibitor at the ANBS, was analysed in microsomes. RESULTS Short-term electrical stimulation evoked a 23.9% and 32.6% decrease (P < 0.05) in SERCA activity and in the FITC binding capacity, respectively, in the superficial region of the muscle. Whereas SERCA activity reverted to normal levels during 30-min recovery, a restoration of the FITC binding capacity did not occur. CONCLUSION The discordant changes between the enzyme activity and the FITC binding suggest that, at least during recovery after exercise, changes in SERCA activity may not correlate closely with structural alterations to the ANBS within the enzyme.
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Affiliation(s)
- T Mishima
- Department of Pre-School Education, Hachinohe Junior College, Aomori, Japan
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Matsunaga S, Endo T, Yagita K, Hirukawa Y, Tomino S, Matsugo S, Tsuruhara T. Chromosome size polymorphisms in the genus acanthamoeba electrokaryotype by pulsed-field gel electrophoresis. Protist 2009. [PMID: 23194715 DOI: 10.1016/s1434-4610(98)70039-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Twenty-eight strains from 12 species from the genus Acanthamoeba, including five isolates from amoebic keratitis patients, were subjected to molecular karyotyping by pulsed-field gel electrophoresis. 9 to 21 chromosome-sized DNA bands ranging from 200 kb to 3 Mb in size were detected. Molecular karyotypes also showed a wide multifariousness, i.e. there existed inter- and intraspecific heterogeneity. The five isolates from amoebic keratitis patients did not exhibit characteristic molecular karyotypes distinguishable from environmental isolates. Although karyotypic heterogeneity was observed within group I amoeba, they are distinguishable from those of group II and III. Strains having identical restriction fragment length polymorphism profiles of mtDNA did not have an identical molecular karyotype, i.e. weak correlation was found between molecular karyotypes and mtDNA restriction fragment length polymorphism profiles.
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Affiliation(s)
- S Matsunaga
- Department of Biology, Tokyo Gakugei University, Koganei-shi, Tokyo 184-8501, Japan
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Someda H, Saka H, Matsunaga S, Ide Y, Nakahara K, Hirata S, Hashimoto M. Age estimation based on three-dimensional measurement of mandibular central incisors in Japanese. Forensic Sci Int 2009; 185:110-4. [PMID: 19201557 DOI: 10.1016/j.forsciint.2009.01.001] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Revised: 12/18/2008] [Accepted: 01/01/2009] [Indexed: 10/21/2022]
Abstract
The purpose of this study was to investigate an age estimation method that considers gender as well as three-dimensional measurement of the components, specifically enamel and dentin. A total of 155 mandibular central incisors aged 12-79 years old which was chosen from the collection stored at the Department of Anatomy in Tokyo Dental College and had no opened apex, caries or restorative treatment, were examined. Samples were scanned using micro-CT HMX225 ACTIS4. Based on the sliced image data, three-dimensional structures were obtained and the volumes of enamel, dentin, and pulp cavity were measured. Regression equations for age estimation were then determined. The accuracy of age estimation equations for each region, volume ratio, and sex was assessed using the determination coefficient R(2) as well as the standard errors of estimated values. The root region alone had a comparable accuracy to that of the whole tooth and the crown region had a relatively lower accuracy. In the whole tooth and the crown region, slightly higher correlations were observed for pulp/tooth volume ratios in which enamel was excluded. Females tended to have higher accuracy compared to males. The estimated age was higher in males compared to females for the same volume ratio of the pulp cavity. The highest correlation in both genders with age was observed for the volume ratio of the pulp cavity to the whole tooth excluding the enamel (males, R(2)=0.67; females, R(2)=0.76). The 95% confidence intervals for the population regression showed different distributions for each sex. In the 95% prediction intervals for age estimation, females tended to have narrower intervals and higher accuracy compared to males. Therefore, the use of gender-specific equations is recommended for age estimation.
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Affiliation(s)
- H Someda
- Department of Anatomy, Tokyo Dental College, Chiba, Japan.
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Motokawa N, Oyama T, Matsunaga S, Miyasaka H, Yamashita M, Dunbar KR. Charge-transfer two-dimensional layers constructed from a 2 : 1 assembly of paddlewheel diruthenium(II,II) complexes and bis[1,2,5]thiadizolotetracyanoquinodimethane: bulk magnetic behavior as a function of inter-layer interactions. CrystEngComm 2009. [DOI: 10.1039/b905486c] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Sakamoto Y, Matsunaga S, Okumura K, Kayama T, Yamazaki K, Takahashi N, Tanaka T, Kizaki Y, Motohiro T, Shinjoh H. Comparison between the NOx release–reduction reaction for Pt/Ba/Al2O3 and Pt/K/Al2O3 on a millisecond time scale. Chem Eng Sci 2008. [DOI: 10.1016/j.ces.2007.08.059] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Shuto T, Matsunaga S, Inomori S, Fujino H. Efficacy of gamma knife surgery for control of peritumoral oedema associated with metastatic brain tumours. J Neurol Neurosurg Psychiatry 2008; 79:1061-5. [PMID: 18245140 DOI: 10.1136/jnnp.2007.130534] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To evaluate the efficacy of gamma knife surgery (GKS) for the control of peritumoral oedema associated with metastatic brain tumours. METHODS A retrospective study of 280 consecutive metastatic brain tumours-100 from lung cancers, 100 from breast cancers and 80 from renal-cell carcinomas, associated with peritumoral oedema. The peritumoral oedema index was measured as A*B*C, where A (cm) was the maximum diameter of peritumoral oedema on the axial image, B (cm) was the maximum diameter perpendicular to A, and C (cm) was the maximum diameter on the coronal image. RESULTS The oedema index of the renal cancer metastases was significantly larger than those of lung and breast cancer metastases (p<0.01). The oedema index of the renal cancer metastases at final imaging was also larger than those of lung (p<0.05) and breast (p<0.01) cancer metastases. The delivered marginal dose (22 Gy or more) was significantly correlated with tumour growth control by multivariate analysis (p = 0.03). Primary site (renal or not renal: p<0.01) and delivered marginal dose (25Gy or more: p = 0.04) were significantly correlated with control of peritumoral oedema by multivariate analysis. CONCLUSIONS Brain oedema around metastatic brain tumours from renal-cell carcinomas was more extensive at the time of GKS and at final imaging compared with lung and breast cancer metastases. This paper suggests that the optimal doses for tumour growth control and brain oedema control may differ for metastatic brain tumours from renal-cell carcinomas.
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Affiliation(s)
- T Shuto
- Department of Neurosurgery, Yokohama Rosai Hospital, 3211 Kozukue-cho, Kouhoku-ku, Yokohama, Kanagawa 222-0036, Japan.
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Shuto T, Inomori S, Matsunaga S, Fujino H. Microsurgery for vestibular schwannoma after gamma knife radiosurgery. Acta Neurochir (Wien) 2008; 150:229-34; discussion 234. [PMID: 18253695 DOI: 10.1007/s00701-007-1486-5] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2007] [Accepted: 12/04/2007] [Indexed: 11/26/2022]
Abstract
BACKGROUND We evaluated the clinical characteristics of microsurgery for vestibular schwannoma (VS) after failed gamma knife radiosurgery (GKS). METHOD Twelve patients, 5 men and 7 women aged 19 to 70 years (mean 54.5 years), who underwent microsurgery after failed GKS for VS were studied retrospectively. FINDINGS The median interval between GKS and microsurgery was 28.8 months (range, 6.6-120 months) and 4 patients had undergone previous microsurgery. The mean volume of tumour at GKS was 6.9 cm(3) (range, 0.5-19.7 cm(3)) and the mean prescription dose to the tumour margin was 12.3 Gy. Microsurgery involved the lateral suboccipital approach in all patients. Tumour expansion involved solid enlargement in 7 patients, cystic enlargement in 3, and central necrosis in 2. Bleeding was slight in all patients except in one, probably because of the previous irradiation. Adhesion to the brain stem was severe in 7 patients. Identification of the facial nerve was easy in 5 operations and difficult in 7. Dissection of the tumour from the facial nerve was difficult in most interventions because of severe adhesions or colour change. Severe adhesions between the trigeminal nerve and the tumour was observed in 2 patients. The tumour was subtotally removed except around the internal auditory canal in most patients. Only one residual tumour increased in size and needed second GKS. The function of the facial nerve deteriorated in 3 patients, was unchanged in 7, and improved in 2. All patients had lost hearing on the affected side at the time of microsurgery. CONCLUSIONS Microsurgery for VS after failed GKS presents some technical difficulties. Dissection of the tumour from the facial nerve or brain stem is likely to be difficult. We recommend subtotal resection without dissection of the facial nerve and tumour, because growth of the residual tumour was rare in our series.
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Affiliation(s)
- T Shuto
- Department of Neurosurgery, Yokohama Rosai Hospital, Yokohama, Kanagawa, Japan.
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Kazama Y, Matsunaga S. The use of repetitive DNA in cytogenetic studies of plant sex chromosomes. Cytogenet Genome Res 2008; 120:247-54. [DOI: 10.1159/000121074] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2007] [Indexed: 11/19/2022] Open
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Matsunaga S, Shuto T, Inomori S, Fujino H, Yamamoto I. Gamma knife radiosurgery for intracranial haemangioblastomas. Acta Neurochir (Wien) 2007; 149:1007-13; discussion 1013. [PMID: 17712513 DOI: 10.1007/s00701-007-1274-2] [Citation(s) in RCA: 40] [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] [Subscribe] [Scholar Register] [Received: 02/13/2007] [Accepted: 07/24/2007] [Indexed: 11/29/2022]
Abstract
BACKGROUND The results of gamma knife radiosurgery for haemangioblastomas were retrospectively studied to assess the efficacy for tumour growth control and clarify the clinical indications for gamma knife radiosurgery in these tumours. METHODS The medical records of 22 patients with 67 tumours, 12 men and 10 women aged 20-73 years (mean 51.9 years), who underwent gamma knife radiosurgery for haemangioblastomas between January 1993 and January 2006, were retrospectively reviewed. Ten patients with 54 lesions had von Hippel-Lindau disease. The mean tumour volume was 1.69 cm(3) (range 0.0097-16.4 cm(3)). Nineteen patients had undergone 1-4 open surgery procedures (mean 1.5) before gamma knife radiosurgery. Tumours without a cystic component, (the solid type), were found in 54 lesions and tumours associated with cyst, (the mural nodule with cyst type), in 13 lesions. The marginal dose was 8-30 Gy (mean 14.0 Gy). FINDINGS Follow-up magnetic resonance (MR) imaging was performed at 9-146 months (mean 63 months). The control rate for tumour growth was 83.6%. The only factor affecting tumour growth control was the presence of a cystic component at the time of gamma knife radiosurgery in both univariate and multivariate analysis. No complication such as radiation-induced peritumoural oedema or radiation necrosis occurred. CONCLUSION The presence of cystic components at the time of gamma knife radiosurgery was the only factor significantly correlated with unfavourable tumour growth control by gamma knife radiosurgery for haemangioblastomas. Gamma knife radiosurgery is effective for solid type tumours, even if the marginal dose is relatively low. Surgical removal is recommended for mural nodule with cyst type tumours, when possible.
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Affiliation(s)
- S Matsunaga
- Department of Neurosurgery, Yokohama Rosai Hospital, Yokohama, Kanagawa, Japan.
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Kanae Y, Endoh D, Yamato O, Hayashi D, Matsunaga S, Ogawa H, Maede Y, Hayashi M. Nonsense mutation of feline β-hexosaminidase β-subunit (HEXB) gene causing Sandhoff disease in a family of Japanese domestic cats. Res Vet Sci 2007; 82:54-60. [PMID: 16872651 DOI: 10.1016/j.rvsc.2006.05.007] [Citation(s) in RCA: 27] [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] [Received: 04/11/2006] [Revised: 05/02/2006] [Accepted: 05/20/2006] [Indexed: 11/21/2022]
Abstract
G(M2) gangliosidoses are inherited metabolic disorders and are caused by severely reduced enzymatic activity of lysosomal beta-hexosaminidase. In the present study, the open reading frame (ORF) of the HEXB gene in a family of Japanese domestic cats with G(M2) gangliosidosis variant 0 (Sandhoff disease) was determined. Two types of abnormal cDNA clones were obtained from the liver of an affected cat tissue. One showed a single nucleotide substitution from C to T at nucleotide position 667 of the HEXB ORF. In the deduced amino acid sequence, the codon of arginine was altered to a stop codon. The genotyping, using PCR-primer introduced restriction analysis confirmed that Sandhoff disease in this family is associated with this nonsense mutation. Discovery of the nonsense mutation will permit the confirmation of the clinical diagnosis of Sandhoff disease in conjugation with the already established enzyme-based test.
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Affiliation(s)
- Y Kanae
- Department of Veterinary Radiology, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan
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Matsunaga S, Saito M, Koishi T, Tamaki S. Dielectric screening effects in molten AgI–AgBr system. Molecular Simulation 2007. [DOI: 10.1080/08927020601067532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Kobayashi S, Uchiyama S, Sone T, Noda M, Lin L, Mizuno H, Matsunaga S, Fukui K. Calreticulin as a new histone binding protein in mitotic chromosomes. Cytogenet Genome Res 2006; 115:10-5. [PMID: 16974078 DOI: 10.1159/000094795] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2005] [Accepted: 03/06/2006] [Indexed: 11/19/2022] Open
Abstract
Calreticulin (CRT) is a multifunctional Ca(2+)-binding protein that mainly functions in the endoplasmic reticulum as a molecular chaperone for newly synthesized proteins. Recently we reported the protein composition of human metaphase chromosomes (Uchiyama et al., 2004), which included CRT. Here we describe new characteristics of CRT in vitro as well as its localization on the surface of metaphase chromosomes in vivo. CRT was detected in the chromosomal fraction by Western blotting and its binding partners were identified as core and linker histones by ligand overlay assay. Surface plasmon resonance sensor analyses revealed that CRT is bound to chromatin fibers. Moreover, we found that CRT has both supercoiling activity, which assists core histone assembly into chromatin fibers, and binding ability to histone H2A/H2B dimers and histone H3/H4 tetramers. Unlike the chromosome scaffold proteins, indirect immunofluorescent staining revealed that CRT is located on the surface of metaphase chromosomes. These results suggest that CRT plays a role which involves chromatin dynamics on the surface of mitotic chromosomes.
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Affiliation(s)
- S Kobayashi
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Yamadaoka, Suita, Japan
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Amano M, Agematsu H, Abe S, Usami A, Matsunaga S, Suto K, Ide Y. Three-dimensional analysis of pulp chambers in maxillary second deciduous molars. J Dent 2006; 34:503-8. [PMID: 16442690 DOI: 10.1016/j.jdent.2005.12.001] [Citation(s) in RCA: 25] [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] [Received: 09/01/2005] [Revised: 11/26/2005] [Accepted: 12/01/2005] [Indexed: 11/22/2022] Open
Abstract
OBJECTIVE The purpose of this study was to clarify the positional relationship between the crown contour and the pulp chamber using micro-CT system for restorations of maxillary second deciduous molar. METHODS Five maxillary second deciduous molar teeth each from the deciduous dentition and the mixed dentition periods were used. The positional relationship between the crown contour and pulp chamber was three-dimensionally observed by micro-CT. In addition, the thickness of the dentin at each of the pulp horns and the volume ratio of the pulp chamber against the whole crown were measured. RESULTS In relationship to the crown contour and the pulp chamber, the pulp horn of the mesiobuccal cusp showed greatest protrusion and eminent swelling of its mesial wall in both the deciduous dentition and the mixed dentition periods. Furthermore, the pulp chamber was shifted to the mesial side. The volume ratio of the pulp chamber to the whole crown, the ratio in the mixed dentition period showed to be significantly smaller than in the deciduous dentition period. The dentin thickness at the mesiobuccal pulp horn was the thinest. CONCLUSIONS These results suggest that in preparation of cavities in maxillary second deciduous molars, care is necessary not to expose of the mesiobuccal pulp horn. Especially, the mesial wall of the mesiobuccal pulp horn should be noted.
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Affiliation(s)
- M Amano
- Department of Anatomy, Tokyo Dental College, 1-2-2 Masago Mihama-ku Chiba, 261-8502 Japan
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Abstract
Trisoxazole macrolides are cytotoxic and antifungal metabolites initially isolated from the egg-ribbons of the Hexabranchus nudibranch and later found in other marine invertebrates. They possess a characteristic macrolide portion, in which three contiguous oxazole units are integrated, and a side-chain with an N-methyl-vinylformamide terminus. The planar structures of the first members of this group, ulapualides and kabiramide C, were determined by interpretation of spectral data in conjunction with chemical degradation. Following these studies, the structures of approximately 35 congeners have been reported, including mycalolides from a marine sponge Mycale sp. The absolute stereochemistry of mycalolides was determined by chemical methods. Trisoxazole macrolides depolymerize F-actin and form a 1:1 complex with G-actin, thereby exhibiting potent toxicity toward eukaryotic cells. X-ray crystallography established the mode of binding of some of the members to G-actin and their absolute stereochemistry.
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Affiliation(s)
- S Matsunaga
- Laboratory of Aquatic Natural Products Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, 1-1-1 Yayoi Bankyo-ku, 113-8657 Tokyo, Japan
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Yone K, Hayashi K, Ijiri K, Yamamoto T, Nagatomo Y, Shimada H, Matsunaga S, Komiya S. Delayed segmental motor paralysis following laminoplasty: two case reports. Spinal Cord 2005; 44:461-4. [PMID: 16317428 DOI: 10.1038/sj.sc.3101866] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
STUDY DESIGN Two patients who experienced the onset of segmental motor paralysis several years after laminoplasty are presented. OBJECTIVES To discuss the mechanism of development of delayed segmental motor paralysis following laminoplasty. SETTING A department of orthopaedic surgery in Japan. METHODS One patient experienced motor weakness in his deltoid and biceps muscles on the left side 5 years after laminoplasty. The other patient noticed motor weakness in his deltoid and biceps on the right side 7 years after laminoplasty. CT myelography revealed posterior spur formation and hypertrophic facet joints on the hinged side at the C4-C5 level in both patients. RESULTS Posterior foraminotomy was performed at the C4-C5 level on the hinged side in both patients. Postoperatively, motor weakness in the deltoid and biceps muscles was improved in both patients. CONCLUSIONS Although spondylotic changes, including spur formation and disc herniation, have occasionally developed in operated segments after laminoplasty, few patients have required additional surgery for treatment of relapse of neurological deficits. It has been believed that spinal cord is rarely compressed by the spondylotic changes since it shifts posteriorly in the enlarged spinal canal. However, laminoplasty disturbs the facet joints since the medial portion of dorsal cortex and cancellous bone in facet joints is drilled out to make a trough. Facet joints disturbed in this fashion undergo degeneration over time after surgery. Nerve roots may occasionally be compressed by degenerated facet joints and spurs that have developed at the entrance of root canal, resulting in segmental motor paralysis several years after laminoplasty. Careful long-term observation is necessary after this procedure.
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Affiliation(s)
- K Yone
- Department of Orthopaedic Surgery, Graduate school of Medical and Dental Sciences, Kagoshima University, Kogoshima, Japan
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Mishima T, Yamada T, Matsunaga S, Wada M. N-acetylcysteine fails to modulate the in vitro function of sarcoplasmic reticulum of diaphragm in the final phase of fatigue. ACTA ACUST UNITED AC 2005; 184:195-202. [PMID: 15954987 DOI: 10.1111/j.1365-201x.2005.01443.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [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: 11/29/2022]
Abstract
AIM In the present study, we tested the hypothesis whether N-acetylcysteine (NAC), a non-specific antioxidant, might influence fatigue by modulating Ca2+-handling capacity by the sarcoplasmic reticulum (SR). METHODS In the presence (10 mm) or absence of NAC, bundles of rat diaphragm were stimulated with tetanic trains (350 ms, 30-40 Hz) at 1 train every 2 s for 300 s. SR functions, as assessed by SR Ca2+-uptake and release rates and SR Ca2+-ATPase activity, were measured in vitro on muscle homogenates. RESULTS Following the 300-s stimulation, the force developed by NAC-treated muscles is approximately 1.8-fold higher (P < 0.05) than that of muscles without NAC treatment. Stimulation elicited an 18-30% depression in SR function (P < 0.05). Despite the differing degrees of fatigue between NAC-treated and non-treated muscles, SR functions in these muscles were reduced to similar extents. CONCLUSIONS These results suggest that modulation of SR function measured in vitro may not be a major contributor to inhibition of diaphragmic fatigue with antioxidant, at least, in the final phase of fatigue where force output is remarkably reduced.
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Affiliation(s)
- T Mishima
- Graduate School of Biosphere Science, Hiroshima University, Higashihiroshima-shi, Hiroshima, Japan
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Yamato O, Matsunaga S, Takata K, Uetsuka K, Satoh H, Shoda T, Baba Y, Yasoshima A, Kato K, Takahashi K, Yamasaki M, Nakayama H, Doi K, Maede Y, Ogawa H. GM2-gangliosidosis variant 0 (Sandhoff-like disease) in a family of Japanese domestic cats. Vet Rec 2004; 155:739-44. [PMID: 15623087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
A five-month-old, female Japanese domestic shorthair cat with proportionate dwarfism developed neurological disorders, including ataxia, decreased postural responses and generalised body and head tremors, at between two and five months of age. Leucocytosis due to lymphocytosis with abnormal cytoplasmic vacuolations was observed. The concentration of G(M2)-ganglioside in its cerebrospinal fluid was markedly higher than in normal cats, and the activities of beta-hexosaminidases A and B in its leucocytes were markedly reduced. On the basis of these biochemical data, the cat was diagnosed antemortem with G(M2)-gangliosidosis variant 0 (Sandhoff-like disease). The neurological signs became more severe and the cat died at 10 months of age. Histopathologically, neurons throughout the central nervous system were distended, and an ultrastructural study revealed membranous cytoplasmic bodies in these distended neurons. The compound which accumulated in the brain was identified as G(M2)-ganglioside, confirming G(M2)-gangliosidosis. A family study revealed that there were probable heterozygous carriers in which the activities of leucocyte beta-hexosaminidases A and B were less than half the normal value. The Sandhoff-like disease observed in this family of Japanese domestic cats is the first occurrence reported in Japan.
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Affiliation(s)
- O Yamato
- Laboratory of Internal Medicine, Department of Veterinary Clinical Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Sapporo 060-0818, Japan
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Uchiyama S, Kobayashi S, Takata H, Ishihara T, Sone T, Matsunaga S, Fukui K. Protein composition of human metaphase chromosomes analyzed by two-dimensional electrophoreses. Cytogenet Genome Res 2004; 107:49-54. [PMID: 15305056 DOI: 10.1159/000079571] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2004] [Accepted: 05/28/2004] [Indexed: 11/19/2022] Open
Abstract
A large amount of metaphase chromosomes were isolated from synchronized human cell lines by a polyamine procedure. All the chromosomal proteins extracted by an acetic acid extraction method were fully dissolved into the sample solutions for isoelectric focusing (IEF) or radical free and highly reduced (RFHR) two-dimensional electrophoreses (2-DEs). As a result, well-separated and highly reproducible 2-DE patterns were obtained. This could not be attained by an ordinary acetone precipitation method. The 2-DE patterns visualized using Coomassie Brilliant Blue (CBB) staining indicated that more than one hundred proteins were involved in the isolated metaphase chromosomes, although the most abundant proteins, histones, occupied a greater part of the chromosomal proteins. It was also shown that colcemid treatment for cell cycle synchronization had little effect on the 2-DE pattern compared to that obtained without the treatment. Furthermore, no significant differences were observed in the 2-DE patterns among the chromosomal proteins prepared from two different human cell lines, BALL-1 and K562. However, 2-DE analysis of isolated metaphase chromosomes from HeLa cells apparently showed a smaller number of proteins than the BALL-1 and K562 cell lines at a neutral pI range. The present study paves the way for elucidating protein composition of human metaphase chromosomes.
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Affiliation(s)
- S Uchiyama
- Department of Biotechnology, Graduate School of Engineering, Osaka University, Suita, Japan
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Tahara M, Aoki T, Suzuka S, Yamashita H, Tanaka M, Matsunaga S, Kokumai S. Isolation of an active element from a high-copy-number family of retrotransposons in the sweetpotato genome. Mol Genet Genomics 2004; 272:116-27. [PMID: 15480792 DOI: 10.1007/s00438-004-1044-2] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2004] [Accepted: 06/30/2004] [Indexed: 11/26/2022]
Abstract
A large number of plant retrotransposons have been characterized, but only three families ( Tnt1, Tto1 and Tos17) have been demonstrated to be transpositionally competent. We have used a novel approach to identify an active member of the Ty1- copia retrotransposon family with estimated 400 copies in the sweetpotato genome. Ty1- copia reverse transcriptase (RTase) sequences from the sweetpotato genome were analyzed, and a group of retrotransposon copies that probably arose by recent transposition events was identified and analyzed further. Transcripts containing long terminal repeats (LTRs) of this group were amplified from callus cDNA by the 3'RACE technique. Patterns of sequence-specific amplification polymorphism (S-SAP) of the LTR sequences in genomic DNA were compared between a normal plant and callus lines derived from it. In this way, a callus-specific S-SAP product was identified, which apparently resulted from the insertion of the retrotransposon detected by 3'RACE during cell culture. We conclude that our approach provides an effective way to identify active elements among the members of high-copy-number retrotransposon families.
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Affiliation(s)
- M Tahara
- Faculty of Agriculture, Okayama University, 700-8530 Okayama, Okayama, Japan.
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Yamada T, Inashima S, Matsunaga S, Nara I, Kajihara H, Wada M. Different time course of changes in sarcoplasmic reticulum and myosin isoforms in rat soleus muscle at early stage of hyperthyroidism. ACTA ACUST UNITED AC 2004; 180:79-87. [PMID: 14706116 DOI: 10.1046/j.0001-6772.2003.01220.x] [Citation(s) in RCA: 20] [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: 11/20/2022]
Abstract
AIMS AND METHODS We studied changes in the expression of myosin and sarcoplasmic reticulum (SR) Ca2+-ATPase (SERCA) and in Ca2+ uptake and release rates by the SR in rat slow-twitch soleus muscles treated with thyroid hormone (3,5,3'-triiodo-l-thyronine, T3) for 1, 3, 7 and 21 days. RESULTS The content of fast SR Ca2+-ATPase isoform SERCA1a protein significantly increased as early as 3 days of T3 treatment, while a rise in fast myosin heavy chain isoforms was found only 21 days after the onset of T3 administration. T3-induced slow-to-fast transitions were much less pronounced in myosin light chain than in myosin heavy chain. Moreover, in vitro measurements of SR Ca2+-handling capacity with indo-1 indicated that increases in uptake rate preceded those of release rate (7 vs. 21 days). CONCLUSION These data suggest that changes in the myosin and SERCA expressions seem not to occur in a coordinated manner at the early stage of hyperthyroidism and that intervention with T3 may temporarily produce slow-twitch type I fibres which contain, in addition to slow SERCA2a isoform, the appreciable amounts of fast SERCA1a isoform. Moreover, it is speculated that some fibres in the hyperthyroid soleus muscles may temporarily acquire unique contractile properties distinct from normal fast and slow fibres.
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Affiliation(s)
- T Yamada
- Graduate School of Medical Sciences, Hiroshima University, Hiroshima, Japan
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Matsunaga S, Inashima S, Tsuchimochi H, Yamada T, Hazama T, Wada M. Altered sarcoplasmic reticulum function in rat diaphragm after high-intensity exercise. Acta Physiol Scand 2002; 176:227-32. [PMID: 12392502 DOI: 10.1046/j.1365-201x.2002.01029.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The present study examined the effects of acute high-intensity exercise on Ca(2+) uptake and release rates and Ca(2+)-adenosine triphosphatase (ATPase) activity of the sarcoplasmic reticulum (SR) from the costal diaphragm. The rats were run on a treadmill at an estimated requirement of 100% of maximal O2 consumption until fatigued (average time to exhaustion: 4.79 min). Muscle lactate and inorganic phosphate after exercise were increased by 65% (P < 0.05) and 35% (P < 0.05), respectively. With exercise, Ca(2+) uptake and release, which were detected in homogenates using the Ca(2+) fluorescent dye indo-1, were decreased by 24% (P < 0.05) and 22% (P < 0.05), respectively. The reduction in Ca(2+) uptake was paralleled by decreased activity of SR Ca(2+)-ATPase in both the absence and presence of Ca(2+) ionophore. These findings demonstrate that, in the diaphragm as well as in the locomotor muscles that have been explored in previous studies, the attenuations of the SR function is brought about by acute high-intensity exercise. These changes in the SR of the diaphragm may contribute, at least in part, to deteriorations in exercise tolerance and work productivity resulting from repetitive physical activities.
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Affiliation(s)
- S Matsunaga
- Institute of Health Sciences and Physical Education, Osaka City University, Osaka-shi, Osaka, Japan
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Matsunaga S, Harmon S, Gohlsch B, Ohlendieck K, Pette D. Inactivation of sarcoplasmic reticulum Ca(2+)-atpase in low-frequency stimulated rat muscle. J Muscle Res Cell Motil 2002; 22:685-91. [PMID: 12222829 DOI: 10.1023/a:1016310607568] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Continuous low-frequency stimulation (CLFS) by implanted electrodes for 12-24 h led to a significant (approximately 30%) decrease in the activity of sarcoplasmic reticulum Ca(2+)-ATPase in fast-twitch extensor digitorum longus (EDL) and tibialis anterior (TA) muscles of intact rats. The decline in catalytic activity after 24 h of CLFS was accompanied by an approximately twofold increase in dinitrophenylhydrazine-reactive carbonyl groups of the enzyme. It also correlated with an immunochemically determined 30% decrease in Ca2(+)-ATPase protein. Recovery studies after 12 h of CLFS revealed a relatively slow (48-72 h) re-establishment of normal catalytic activity. These findings suggest that the 30% decline of Ca(2+)-ATPase activity in low-frequency stimulated rat muscle led to an irreversible modification by protein oxidation. The decrease in Ca(2+)-ATPase protein most likely resulted from the degradation of inactive Ca(2+)-ATPase molecules. The relatively slow recovery of Ca(2+)-ATPase activity suggests that de novo synthesis of the enzyme may be necessary to re-attain normal activity.
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Affiliation(s)
- S Matsunaga
- Department of Biology, University of Konstanz, Germany
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Kita A, Matsunaga S, Takai A, Kataiwa H, Wakimoto T, Fusetani N, Isobe M, Miki K. Crystal structure of the complex between calyculin A and protein phosphatase 1 catalytic subunit. Acta Crystallogr A 2002. [DOI: 10.1107/s010876730208916x] [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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Abstract
In general, rats and mice have not been used in research on emesis because they do not vomit. However, emetogenic stimuli such as anticancer drugs, apomorphine, copper sulfate and rotation induced pica, a behavior characterized by eating nonfood substances such as kaolin, in rats. We also found that cisplatin induced pica in mice, but it was rather difficult to determine the exact kaolin consumption in this species. In this study, we prepared kaolin pellets mixed with carmine, a dye not absorbed in the gastrointestinal tract, and estimated kaolin consumption by determination of carmine excreted in feces. Cisplatin (5 mg/kg) caused a significant increase in kaolin consumption (saline: 0.15 +/- 0.08 g vs. cisplatin: 0.45 +/- 0.16 g) and pretreatment with the 5-HT3 receptor antagonist, ondansetron (2 mg/kg), suppressed the increased consumption (vehicle: 0.33 +/- 0.05 g vs. ondansetron: 0.13 +/- 0.04 g). These findings suggested that the exact kaolin consumption could be quantified by the determination of carmine in feces and that mice could be useful for studying emesis.
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Affiliation(s)
- K Yamamoto
- Department of Medical Physics, School of Allied Health Sciences, Faculty of Medicine, Osaka University, Osaka, Japan
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Kumagai N, Matsunaga S, Shibasaki M. Enantioselective 1,4-addition of unmodified ketone catalyzed by a bimetallic Zn-Zn-linked-BINOL complex. Org Lett 2001; 3:4251-4. [PMID: 11784190 DOI: 10.1021/ol016981h] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
1,4-Addition (Michael addition) of 2-hydroxy-2'-methoxyacetophenone (2) to various alpha,beta-unsaturated ketones was efficiently promoted by a bimetallic Zn-Zn-linked-BINOL complex 3 with good yield (up to 90%) and excellent enantiomeric excess (up to 99% ee). The resulting 2-hydroxy-1,5-diketones were successfully converted to synthetically more versatile esters and amides. [reaction: see text]
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Affiliation(s)
- N Kumagai
- Graduate School of Pharmaceutical Sciences, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Tsukamoto S, Tane K, Ohta T, Matsunaga S, Fusetani N, van Soest RW. Four new bioactive pyrrole-derived alkaloids from the marine sponge Axinella brevistyla. J Nat Prod 2001; 64:1576-1578. [PMID: 11754618 DOI: 10.1021/np010280b] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Four new alkaloids (1-4) were isolated from the marine sponge Axinella brevistyla, and their structures were determined on the basis of spectroscopic analysis. The alkaloids 1-4 were antifungal against the yeast Saccharomyces cerevisiae at <1.0, <1.0, 30, and 100 microg/disk, respectively. Compounds 1-3 also exhibited cytotoxicity against L1210 cells with IC(50) values of 1.1, 0.66, and 2.5 microg/mL, respectively.
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Affiliation(s)
- S Tsukamoto
- Faculty of Pharmaceutical Sciences, Kanazawa University, Takara-machi, Kanazawa 920-0934, Japan.
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