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Kakutani N, Yokota T, Fukushima A, Obata Y, Ono T, Sota T, Kinugasa Y, Takahashi M, Matsuo H, Matsukawa R, Yoshida I, Kakinoki S, Yonezawa K, Himura Y, Yokota I, Yamamoto K, Tsuchihashi-Makaya M, Kinugawa S. Impact of citrus fruit intake on the mental health of patients with chronic heart failure. J Cardiol 2021; 79:719-726. [PMID: 34955372 DOI: 10.1016/j.jjcc.2021.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/20/2021] [Accepted: 11/25/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND The full impact of the intake of citrus fruits on the risk of depression in individuals with chronic heart failure (HF) is unknown. Here, we examined the associations between the estimated habitual intakes of citrus fruits and depressive symptoms in patients with chronic HF. METHODS We enrolled 150 stable outpatients with chronic HF who had a history of worsening HF. To assess the patients' daily dietary patterns, we used a brief self-administered diet-history questionnaire to calculate the daily consumption of foods and nutrients. To assess the patients' mental state, we used a nine-item Patient Health Questionnaire (PHQ-9). RESULTS Twelve patients (8%) were identified as having moderate-to-severe depression (PHQ-9 score ≥10). The patients with PHQ-9 ≥10 had lower daily intakes of citrus fruits compared to those with no or mild depressive symptoms (PHQ-9 <10). The daily intakes of various antioxidants, including vitamin C, β-carotene, and β-cryptoxanthin, all of which are abundant in citrus fruits, were reduced in the patients with PHQ-9 ≥10, accompanied by higher serum levels of 8-isoprostane (an oxidative stress marker). A multivariate logistic regression analysis using forward selection showed that a lowered daily intake of citrus fruits was an independent predictor of the comorbidity of moderate-to-severe depression in patients with chronic HF, after adjustment for age, gender, and the hemoglobin value. CONCLUSIONS A lower daily consumption of citrus fruits was associated with higher prevalence of depression in patients with chronic HF. Our findings support the hypothesis that a daily consumption of citrus fruits has a beneficial effect on the prevention and treatment of depression in chronic HF patients.
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Affiliation(s)
- Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan; Institute of Health Science Innovation for Medical Care, Hokkaido University Hospital, Kita-14 Nishi-5, Kita-Ku, Sapporo 060-8648, Japan.
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Taisuke Ono
- Department of Cardiology, Kitami Red Cross Hospital, Kitami, Japan
| | - Takeshi Sota
- Division of Rehabilitation, Tottori University Hospital, Tottori, Japan
| | - Yoshiharu Kinugasa
- Department of Cardiovascular Medicine and Endocrinology and Metabolism, Faculty of Medicine, Tottori University, Tottori, Japan
| | | | - Hisashi Matsuo
- Department of Cardiology, Keiwakai Ebetsu Hospital, Ebetsu, Japan
| | - Ryuichi Matsukawa
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka, Japan
| | - Ichiro Yoshida
- Department of Cardiology, Obihiro Kyokai Hospital, Obihiro, Japan
| | - Shigeo Kakinoki
- Department of Cardiology, Otaru Kyokai Hospital, Otaru, Japan
| | - Kazuya Yonezawa
- Department of Clinical Research, National Hospital Organization Hakodate National Hospital, Hakodate, Japan
| | - Yoshihiro Himura
- Department of Cardiology, Hikone Municipal Hospital, Hikone, Japan
| | - Isao Yokota
- Department of Biostatistics, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kazuhiro Yamamoto
- Department of Cardiovascular Medicine and Endocrinology and Metabolism, Faculty of Medicine, Tottori University, Tottori, Japan
| | | | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Kakutani N, Takada S, Nambu H, Maekawa S, Hagiwara H, Yamanashi K, Obata Y, Nakano I, Fumoto Y, Hata S, Furihata T, Fukushima A, Yokota T, Kinugawa S. Angiotensin-converting enzyme inhibitor prevents skeletal muscle fibrosis in diabetic mice. Exp Physiol 2021; 106:1785-1793. [PMID: 33998079 DOI: 10.1113/ep089375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/12/2021] [Indexed: 01/25/2023]
Abstract
NEW FINDINGS What is the central question of this study? We questioned whether an angiotensin-converting enzyme (ACE) inhibitor prevents skeletal muscle fibrosis in diabetic mice. What is the main finding and its importance? Administration of ACE inhibitor prevents the increase in skeletal muscle fibrosis during the early phase after induction of diabetes by streptozotocin. Our findings might provide a new therapeutic target for skeletal muscle abnormalities in diabetes. ABSTRACT Fibrosis is characterized by the excessive production and accumulation of extracellular matrix components, including collagen. Although the extracellular matrix is an essential component of skeletal muscle, fibrosis can have negative effects on muscle function. Skeletal muscle fibrosis was shown to be increased in spontaneously hypertensive rats and to be prevented by an angiotensin-converting enzyme (ACE) inhibitor, an antihypertensive drug, in dystrophic mice or a mouse model of myocardial infarction. In this study, we therefore analysed whether (1) there is increased skeletal muscle fibrosis in streptozotocin (STZ)-induced diabetic mice, and (2) a preventive effect on skeletal muscle fibrosis by administration of an ACE inhibitor. Skeletal muscle fibrosis was significantly increased in STZ-induced diabetic mice compared with control mice from 2 to 14 days post-STZ. The ACE inhibitor prevented both skeletal muscle fibrosis and the reduction in muscle function in STZ-treated mice. Our study demonstrated that administration of an ACE inhibitor prevents the increase in skeletal muscle fibrosis during the early phase after onset of diabetes. Our findings might provide a new therapeutic target for skeletal muscle abnormalities in diabetes. Future studies are required to clarify whether skeletal muscle fibrosis is also linked directly to physical activity.
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Affiliation(s)
- Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.,Research Fellow of the Japan Society for the Promotion of Science, Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.,Department of Sports Education, Faculty of Lifelong Sport, Hokusho University, Ebetsu, Japan.,Department of Molecular Biology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Hideo Nambu
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Satoshi Maekawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hikaru Hagiwara
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Katsuma Yamanashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Ippei Nakano
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshizuki Fumoto
- Department of Molecular Biology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Soichiro Hata
- Department of Molecular Biology, Hokkaido University Graduate School of Medicine, Sapporo, Japan
| | - Takaaki Furihata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.,Department of Experimental and Clinical Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
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Obata Y, Kakutani N, Kinugawa S, Fukushima A, Yokota T, Takada S, Ono T, Sota T, Kinugasa Y, Takahashi M, Matsuo H, Matsukawa R, Yoshida I, Yokota I, Yamamoto K, Tsuchihashi-Makaya M. Impact of Inadequate Calorie Intake on Mortality and Hospitalization in Stable Patients with Chronic Heart Failure. Nutrients 2021; 13:nu13030874. [PMID: 33800134 PMCID: PMC7998469 DOI: 10.3390/nu13030874] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Revised: 02/25/2021] [Accepted: 03/04/2021] [Indexed: 11/16/2022] Open
Abstract
Malnutrition is highly prevalent in patients with heart failure (HF), but the precise impact of dietary energy deficiency on HF patients' clinical outcomes is not known. We investigated the associations between inadequate calorie intake and adverse clinical events in 145 stable outpatients with chronic HF who had a history of hospitalization due to worsening HF. To assess the patients' dietary pattern, we used a brief self-administered diet-history questionnaire (BDHQ). Inadequate calorie intake was defined as <60% of the estimated energy requirement. In the total chronic HF cohort, the median calorie intake was 1628 kcal/day. Forty-four patients (30%) were identified as having an inadequate calorie intake. A Kaplan-Meier analysis revealed that the patients with inadequate calorie intake had significantly worse clinical outcomes including all-cause death and HF-related hospitalization during the 1-year follow-up period versus those with adequate calorie intake (20% vs. 5%, p < 0.01). A multivariate logistic regression analysis showed that inadequate calorie intake was an independent predictor of adverse clinical events after adjustment for various factors that may influence patients' calorie intake. Among patients with chronic HF, inadequate calorie intake was associated with an increased risk of all-cause mortality and rehospitalization due to worsening HF. However, our results are preliminary and larger studies with direct measurements of dietary calorie intake and total energy expenditure are needed to clarify the intrinsic nature of this relationship.
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Affiliation(s)
- Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan; (Y.O.); (N.K.); (A.F.); (T.Y.); (S.T.)
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan; (Y.O.); (N.K.); (A.F.); (T.Y.); (S.T.)
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan; (Y.O.); (N.K.); (A.F.); (T.Y.); (S.T.)
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyusyu University, Fukuoka 812-8582, Japan
- Correspondence: ; Tel.: +81-92-642-5360
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan; (Y.O.); (N.K.); (A.F.); (T.Y.); (S.T.)
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan; (Y.O.); (N.K.); (A.F.); (T.Y.); (S.T.)
- Clinical Research and Medical Innovation Center, Hokkaido University Hospital, Sapporo 060-8648, Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan; (Y.O.); (N.K.); (A.F.); (T.Y.); (S.T.)
| | - Taisuke Ono
- Department of Cardiology, Kitami Red Cross Hospital, Kitami 090-8666, Japan;
| | - Takeshi Sota
- Division of Rehabilitation, Tottori University Hospital, Tottori 683-8504, Japan;
| | - Yoshiharu Kinugasa
- Department of Cardiovascular Medicine and Endocrinology and Metabolism, Faculty of Medicine, Tottori University, Tottori 683-8503, Japan; (Y.K.); (K.Y.)
| | - Masashige Takahashi
- Department of Cardiology, Kushiro City General Hospital, Kushiro 085-0822, Japan;
| | - Hisashi Matsuo
- Department of Cardiology, Keiwakai Ebetsu Hospital, Ebetsu 069-0817, Japan;
| | - Ryuichi Matsukawa
- Division of Cardiology, Cardiovascular and Aortic Center, Saiseikai Fukuoka General Hospital, Fukuoka 810-0001, Japan;
| | - Ichiro Yoshida
- Department of Cardiology, Obihiro Kyokai Hospital, Obihiro 080-0805, Japan;
| | - Isao Yokota
- Department of Biostatistics, Faculty of Medicine, Graduate School of Medicine, Hokkaido University, Sapporo 060-8638, Japan;
| | - Kazuhiro Yamamoto
- Department of Cardiovascular Medicine and Endocrinology and Metabolism, Faculty of Medicine, Tottori University, Tottori 683-8503, Japan; (Y.K.); (K.Y.)
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4
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Nambu H, Takada S, Maekawa S, Matsumoto J, Kakutani N, Furihata T, Shirakawa R, Katayama T, Nakajima T, Yamanashi K, Obata Y, Nakano I, Tsuda M, Saito A, Fukushima A, Yokota T, Nio-Kobayashi J, Yasui H, Higashikawa K, Kuge Y, Anzai T, Sabe H, Kinugawa S. Inhibition of xanthine oxidase in the acute phase of myocardial infarction prevents skeletal muscle abnormalities and exercise intolerance. Cardiovasc Res 2021; 117:805-819. [PMID: 32402072 DOI: 10.1093/cvr/cvaa127] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/01/2020] [Indexed: 12/12/2022] Open
Abstract
AIMS Exercise intolerance in patients with heart failure (HF) is partly attributed to skeletal muscle abnormalities. We have shown that reactive oxygen species (ROS) play a crucial role in skeletal muscle abnormalities, but the pathogenic mechanism remains unclear. Xanthine oxidase (XO) is reported to be an important mediator of ROS overproduction in ischaemic tissue. Here, we tested the hypothesis that skeletal muscle abnormalities in HF are initially caused by XO-derived ROS and are prevented by the inhibition of their production. METHODS AND RESULTS Myocardial infarction (MI) was induced in male C57BL/6J mice, which eventually led to HF, and a sham operation was performed in control mice. The time course of XO-derived ROS production in mouse skeletal muscle post-MI was first analysed. XO-derived ROS production was significantly increased in MI mice from Days 1 to 3 post-surgery (acute phase), whereas it did not differ between the MI and sham groups from 7 to 28 days (chronic phase). Second, mice were divided into three groups: sham + vehicle (Sham + Veh), MI + vehicle (MI + Veh), and MI + febuxostat (an XO inhibitor, 5 mg/kg body weight/day; MI + Feb). Febuxostat or vehicle was administered at 1 and 24 h before surgery, and once-daily on Days 1-7 post-surgery. On Day 28 post-surgery, exercise capacity and mitochondrial respiration in skeletal muscle fibres were significantly decreased in MI + Veh compared with Sham + Veh mice. An increase in damaged mitochondria in MI + Veh compared with Sham + Veh mice was also observed. The wet weight and cross-sectional area of slow muscle fibres (higher XO-derived ROS) was reduced via the down-regulation of protein synthesis-associated mTOR-p70S6K signalling in MI + Veh compared with Sham + Veh mice. These impairments were ameliorated in MI + Feb mice, in association with a reduction of XO-derived ROS production, without affecting cardiac function. CONCLUSION XO inhibition during the acute phase post-MI can prevent skeletal muscle abnormalities and exercise intolerance in mice with HF.
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MESH Headings
- Animals
- Cell Hypoxia
- Cell Line
- Disease Models, Animal
- Enzyme Inhibitors/pharmacology
- Exercise Tolerance/drug effects
- Febuxostat/pharmacology
- Male
- Mice, Inbred C57BL
- Mitochondria, Muscle/drug effects
- Mitochondria, Muscle/enzymology
- Mitochondria, Muscle/pathology
- Muscle Fibers, Skeletal/drug effects
- Muscle Fibers, Skeletal/enzymology
- Muscle Fibers, Skeletal/pathology
- Muscle Strength/drug effects
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/enzymology
- Muscle, Skeletal/pathology
- Muscle, Skeletal/physiopathology
- Muscular Atrophy/enzymology
- Muscular Atrophy/pathology
- Muscular Atrophy/physiopathology
- Muscular Atrophy/prevention & control
- Myocardial Infarction/drug therapy
- Myocardial Infarction/enzymology
- Myocardial Infarction/pathology
- Myocardial Infarction/physiopathology
- Reactive Oxygen Species/metabolism
- Ribosomal Protein S6 Kinases, 70-kDa/metabolism
- TOR Serine-Threonine Kinases/metabolism
- Time Factors
- Xanthine Oxidase/antagonists & inhibitors
- Xanthine Oxidase/metabolism
- Mice
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Affiliation(s)
- Hideo Nambu
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Department of Molecular Biology, Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Department of Sports Education, Faculty of Lifelong Sport, Hokusho University, Ebetsu, Japan
| | - Satoshi Maekawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Junichi Matsumoto
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Research Fellow of the Japan Society for the Promotion of Science, Japan
| | - Takaaki Furihata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Ryosuke Shirakawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takashi Katayama
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takayuki Nakajima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Katsuma Yamanashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Ippei Nakano
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Masaya Tsuda
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akimichi Saito
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
- Institute of Preventive Medical Sciences, Health Sciences University of Hokkaido, Sapporo, Japan
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Junko Nio-Kobayashi
- Laboratory of Histology and Cytology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hironobu Yasui
- Central Institute of Isotope Science, Hokkaido University, Sapporo, Japan
| | - Kei Higashikawa
- Central Institute of Isotope Science, Hokkaido University, Sapporo, Japan
| | - Yuji Kuge
- Central Institute of Isotope Science, Hokkaido University, Sapporo, Japan
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hisataka Sabe
- Department of Molecular Biology, Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Obata Y, Ishimori N, Saito A, Kinugawa S, Yokota T, Takada S, Nakano I, Kakutani N, Yamanashi K, Anzai T. Activation of invariant natural killer T cells by alpha-galactosylceramide ameliorates doxorubicin-induced cardiotoxicity in mice. Eur J Prev Cardiol 2020; 27:2358-2361. [DOI: 10.1177/2047487319901208] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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6
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Obata Y, Ishimori N, Saito A, Kinugawa S, Nakano I, Kakutani N, Yamanashi K, Yokota T, Anzai T. Activation of invariant natural killer T cells ameliorates doxorubicin-induced cardiotoxicity in mice. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Objective
Doxorubicin (DOX) is one of the most important anticancer agents and widely used to treat cancers but clinical utility of DOX is limited for its dose-dependent cardiotoxicity. The precise mechanism of DOX-induced cardiotoxicity is still not fully understood but it has been reported that cardiac inflammation is involved in the cardiotoxicity. Invariant natural killer T (iNKT) cells, a unique subset of T lymphocytes that recognize glycolipid antigens and secrete a large amount of both Th1 and Th2 cytokines on activation, have been shown to play crucial roles in the regulation of immune responses. However, it remains unclear whether iNKT cells are involved in DOX-induced cardiotoxicity.
Methods and results
Male C57BL/6J mice were administered DOX (20mg/kg body weight; n=28) or vehicle (Vehicle; n=6). DOX-administered mice were further divided into 2 groups; those treated with α-galactosylceramide (αGC, 0.1μg/g body weight; DOX-αGC; n=14), which specifically activates iNKT cells, or those treated with PBS (DOX-PBS; n=14) by intraperitoneal injections (twice; 4 days before and 3 days after DOX administration).An echocardiography conducted at 14 days after DOX/Vehicle administration revealed that LV fractional shortening was significantly reduced in the DOX-PBS compared to the Vehicle (49.3±0.8% vs. 59.2±1.7%, P<0.05), and this decrease was completely attenuated in the DOX-αGC (57.7±1.3%, P<0.05 vs. DOX-PBS)without affecting LV end-diastolic diameter. Flow cytometric analysis revealed that the ratio of iNKT cells to mononuclear cells infiltrated into the heart tissue was significantly increased in the DOX+αGC compared to the Vehicle and the DOX+PBS (1.00±0.09% vs. 0.54±0.09% and 0.71±0.07%, P<0.05). Immuno-histochemistry revealed that the infiltration number of Iba1+macrophages in the heart tissue was significantly elevated in the DOX+αGC compared to the Vehicle and the DOX+PBS (55.4±3.2 cells/mm2 vs. 21.7±2.0 cells/mm2 and 37.5±5.9 cells/mm2, P<0.05) The ratio of fibrosis area to the heart tissue was markedly higher in the DOX-PBS than in Vehicle (4.3±0.5% vs. 2.2±0.1%, P<0.05), and this increase was completely attenuated in the DOX-αGC (2.8±0.1%, P<0.05 vs.DOX-PBS).Real-time PCR analysis revealed that mRNA expressions of M2 macrophage markers (Arginase 1 and Retnla) and IL-4 were significantly enhanced in the DOX+αGC compared to the DOX+PBS (Arginase 1: 2.5±0.4 vs. 1.6±0.3 [relative ratio to the Vehicle], P=0.08; Retnla: 2.4±0.5 vs. 1.1±0.2 [relative ratio to the Vehicle], P<0.05; IL-4: 1.0±0.3 vs. 8.94±2.8 [relative ratio to the DOX+PBS], P<0.05), while those of M1 macrophage markers (iNOS and MCP-1) did not change among all groups.
Conclusions
Activation of iNKT cells ameliorates DOX-induced cardiotoxicity in mice via enhanced M2 macrophage polarization with the upregulation of IL-4 and reducing cardiac fibrosis. iNKT cell activation can be a novel preventive strategy against DOX-induced cardiotoxicity.
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): Japan Agency for Medical Research and Development (18lm0203001j0002) and JSPS KAKENHI (18K15834).
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Affiliation(s)
- Y Obata
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - N Ishimori
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - A Saito
- Health Sciences University of Hokkaido, Cardiovascular Medicine, Sapporo, Japan
| | - S Kinugawa
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - I Nakano
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - N Kakutani
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - K Yamanashi
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - T Yokota
- Hokkaido University, Sapporo, Japan
| | - T Anzai
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
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7
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Ishikawa K, Fukushima A, Yokota T, Takada S, Furihata T, Kakutani N, Yamanashi K, Obata Y, Nakano I, Abe T, Kinugawa S, Anzai T. Clinical Impact and Associated Factors of Delayed Ambulation in Patients With Acute Heart Failure. Circ Rep 2020; 1:179-186. [PMID: 33693135 PMCID: PMC7889457 DOI: 10.1253/circrep.cr-18-0022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Background:
In heart failure (HF) management, early ambulation is recommended to prevent physical deconditioning. The effects of delayed ambulation on later clinical outcomes and the factors linked to delayed ambulation in hospitalized HF patients, however, remain unestablished. Methods and Results:
We retrospectively investigated 101 patients (mean age, 66±17 years) who were hospitalized for acute decompensated HF. During the mean follow-up of 244±15 days after hospital discharge, 34 patients had cardiovascular events leading to death or unplanned readmission. Patients with cardiovascular events had longer median days to acquire ambulation than those without cardiovascular events (11 days, IQR, 8–20 days vs. 7 days, IQR, 5–15 days, P<0.001). The optimal cut-off period until initiation of ambulation to discriminate cardiovascular events was 8 days, indicating that longer days (≥8 days) to acquire ambulation was associated with higher rates of cardiovascular events, even after adjustment of multiple confounders. On multivariate analysis, age >65 years (odds ratio [OR], 2.49; 95% confidence interval [CI]: 1.04–6.09) and increase in blood urea nitrogen (BUN; OR, 1.04; 95% CI: 1.01–1.08) were independent predictors of delayed ambulation. Conclusions:
Delayed ambulation is associated with older age and increased BUN in patients with acute HF. Time to ambulation in the recovery phase of acute HF is important, and delayed ambulation may increase the rate of cardiovascular events after hospital discharge.
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Affiliation(s)
- Koji Ishikawa
- Department of Nursing, Hokkaido University of Science Sapporo Japan.,Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Takaaki Furihata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Katsuma Yamanashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Ippei Nakano
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Takahiro Abe
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University Sapporo Japan
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Yamanashi K, Kinugawa S, Fukushima A, Kakutani N, Takada S, Obata Y, Nakano I, Yokota T, Kitaura Y, Shimomura Y, Anzai T. Branched-chain amino acid supplementation ameliorates angiotensin II-induced skeletal muscle atrophy. Life Sci 2020; 250:117593. [PMID: 32234320 DOI: 10.1016/j.lfs.2020.117593] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 03/25/2020] [Accepted: 03/26/2020] [Indexed: 01/30/2023]
Abstract
AIMS Sarcopenia is characterized by muscle mass and strength loss and reduced physical activity. Branched-chain amino acids (BCAAs) were recently described as an activator of protein synthesis via mammalian target of rapamycin (mTOR) signaling for muscle atrophy. In cardiovascular diseases, excessive activation of the renin-angiotensin system may induce an imbalance of protein synthesis and degradation, and this plays a crucial role in muscle atrophy. We investigated the effects of BCAAs on angiotensin II (Ang II)-induced muscle atrophy in mice. MATERIALS AND METHODS We administered Ang II (1000 ng/kg/min) or vehicle to 10-12-week-old male C57BL/6J mice via subcutaneous osmotic minipumps for 4 weeks with or without BCAA supplementation (3% BCAA in tap water). KEY FINDINGS The skeletal muscle weight/tibial length and cross-sectional area were smaller in the Ang II mice than the vehicle mice; these changes were induced by an imbalance of protein synthesis and degradation signaling such as Akt/mTOR and MuRF-1/Atrogin-1. Compared to the Ang II mice, the mTOR signaling was significantly activated and Ang II-induced muscle atrophy was ameliorated in the Ang II + BCAA mice, and this attenuated the reduction of exercise capacity. Notably, the decrease of muscle weight/tibial length in the fast-twitch dominant muscles (e.g., the extensor digitorum longus) was significantly ameliorated compared to that in the slow-twitch dominant muscles (e.g., soleus). Histologically, the effect of BCAA was larger in fast-twitch than slow-twitch fibers, which may be related to the difference in BCAA catabolism. SIGNIFICANCE BCAA supplementation could contribute to the prevention of skeletal muscle atrophy induced by Ang II.
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Affiliation(s)
- Katsuma Yamanashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan.
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan; Research Fellow of the Japan Society for the Promotion of Science, Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan; Faculty of Lifelong Sport, Department of Sports Education, Hokusho University, Ebetsu 0698511, Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan
| | - Ippei Nakano
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan
| | - Yasuyuki Kitaura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 4648601, Japan
| | - Yoshiharu Shimomura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 4648601, Japan
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo 0608638, Japan
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Takahashi M, Kinugawa S, Takada S, Kakutani N, Furihata T, Sobirin MA, Fukushima A, Obata Y, Saito A, Ishimori N, Iwabuchi K, Tsutsui H. The disruption of invariant natural killer T cells exacerbates cardiac hypertrophy and failure caused by pressure overload in mice. Exp Physiol 2020; 105:489-501. [PMID: 31957919 DOI: 10.1113/ep087652] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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: 02/11/2019] [Accepted: 01/17/2020] [Indexed: 12/18/2022]
Abstract
NEW FINDINGS What is the central question of this study? We questioned whether the disruption of invariant natural killer T (iNKT) cells exacerbates left ventricular (LV) remodelling and heart failure after transverse aortic constriction in mice. What are the main findings and their importance? Pressure overload induced by transverse aortic constriction increased the infiltration of iNKT cells in mouse hearts. The disruption of iNKT cells exacerbated LV remodelling and hastened the transition from hypertrophy to heart failure, in association with the activation of mitogen-activated protein kinase signalling. Activation of iNKT cells modulated the immunological balance in this process and played a protective role against LV remodelling and failure. ABSTRACT Chronic inflammation is involved in the development of cardiac remodelling and heart failure (HF). Invariant natural killer T (iNKT) cells, a subset of T lymphocytes, have been shown to produce various cytokines and orchestrate tissue inflammation. The pathophysiological role of iNKT cells in HF caused by pressure overload has not been studied. In the present study, we investigated whether the disruption of iNKT cells affected this process in mice. Transverse aortic constriction (TAC) and a sham operation were performed in male C57BL/6J wild-type (WT) and iNKT cell-deficient Jα18 knockout (KO) mice. The infiltration of iNKT cells was increased after TAC. The disruption of iNKT cells exacerbated left ventricular (LV) remodelling and hastened the transition to HF after TAC. Histological examinations also revealed that the disruption of iNKT cells induced greater myocyte hypertrophy and a greater increase in interstitial fibrosis after TAC. The expressions of interleukin-10 and tumour necrosis factor-α mRNA and their ratio in the LV after TAC were decreased in the KO compared with WT mice, which might indicate that the disruption of iNKT cells leads to an imbalance between T-helper type 1 and type 2 cytokines. The phosphorylation of extracellular signal-regulated kinase was significantly increased in the KO mice. The disruption of iNKT cells exacerbated the development of cardiac remodelling and HF after TAC. The activation of iNKT cells might play a protective role against HF caused by pressure overload. Targeting the activation of iNKT cells might thus be a promising candidate as a new therapeutic strategy for HF.
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Affiliation(s)
- Masashige Takahashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takaaki Furihata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | | | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Akimichi Saito
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Naoki Ishimori
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Kazuya Iwabuchi
- Department of Immunobiology, Kitasato University School of Medicine, Kanagawa, Japan
| | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University, Fukuoka, Japan
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Nakano I, Kinugawa S, Hori H, Fukushima A, Yokota T, Takada S, Kakutani N, Obata Y, Yamanashi K, Anzai T. Serum Brain-Derived Neurotrophic Factor Levels Are Associated with Skeletal Muscle Function but Not with Muscle Mass in Patients with Heart Failure. Int Heart J 2020; 61:96-102. [DOI: 10.1536/ihj.19-400] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Ippei Nakano
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Hiroaki Hori
- Department of Rehabilitation, Hokkaido University Hospital
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
- Research Fellow of the Japan Society for the Promotion of Science
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Katsuma Yamanashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University
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Nambu H, Takada S, Fukushima A, Matsumoto J, Kakutani N, Maekawa S, Shirakawa R, Nakano I, Furihata T, Katayama T, Yamanashi K, Obata Y, Saito A, Yokota T, Kinugawa S. Empagliflozin restores lowered exercise endurance capacity via the activation of skeletal muscle fatty acid oxidation in a murine model of heart failure. Eur J Pharmacol 2020; 866:172810. [DOI: 10.1016/j.ejphar.2019.172810] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2019] [Revised: 11/14/2019] [Accepted: 11/14/2019] [Indexed: 02/07/2023]
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Obata Y, Ishimori N, Saito A, Kinugawa S, Nakano I, Kakutani N, Yamanashi K, Anzai T. P1623Activation of invariant natural killer T cells by alpha-galactosylceramide ameliorates doxorubicin-induced cardiotoxicity in mice. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Objective
Doxorubicin (DOX) is an effective antineoplastic agent commonly used to treat many types of cancer but its clinical use is limited because of cardiotoxicity, which might proceed to irreversible cardiac dysfunction in a dose-dependent manner. The precise mechanism of DOX-induced cardiotoxicity is still not fully elucidated but it has been reported that cardiac inflammation is involved in the cardiotoxicity. Invariant natural killer T (iNKT) cells, a unique subset of T lymphocytes that recognize glycolipid antigens and secrete a large amount of Th1 and Th2 cytokines on activation, have been shown to play crucial roles in the regulation of immune responses. However, it remains unclear whether iNKT cells are involved in DOX-induced cardiotoxicity.
Methods and results
Male C57BL/6J mice were administered DOX (20mg/kg body weight single intraperitoneal injection; n=28) or vehicle (Vehicle; n=6). DOX-administered mice were further divided into 2 groups; α-galactosylceramide (αGC, 0.1μg/g body weight twice intraperitoneal injection; DOX-αGC; n=14), which specifically activates iNKT cells, or phosphate-buffered saline alone (PBS; DOX-PBS; n=14) 4 days before and 3 days after DOX administration. Survival rate at 14 days after DOX/Vehicle administration was significantly lower in DOX-PBS than in Vehicle (71% vs. 100%, P<0.05), and this decrease was completely attenuated in DOX-αGC (100%, P<0.05 vs. DOX-PBS). Echocardiography at 14 days after DOX/Vehicle administration revealed that left ventricular (LV) fractional shortening was significantly reduced in DOX-PBS compared to Vehicle (49.3±0.8% vs. 59.2±1.7%, P<0.05), and this decrease was completely attenuated in DOX-αGC (57.7±1.3%, P<0.05 vs. DOX-PBS) without affecting LV end-diastolic diameter. Picro-sirius red staining revealed that the ratio of fibrosis area to the cardiac tissue was markedly higher in DOX-PBS than in Vehicle (4.3±0.5% vs. 2.2±0.1%, P<0.05), and this increase was completely attenuated in DOX-αGC (2.8±0.1%, P<0.05 vs. DOX-PBS). Real-time PCR analysis revealed that mRNA expression of anti-inflammatory Th2 cytokine IL-4 was enhanced by 7.9-folds in DOX-αGC compared to DOX-PBS, though the difference did not reach statistically significance (P=0.09).
Conclusions
Activation of iNKT cells by αGC ameliorates DOX-induced cardiotoxicity in mice via up-regulation of anti-inflammatory IL-4 and reducing cardiac fibrosis. iNKT cell activation may be a novel therapeutic strategy against DOX-induced cardiotoxicity.
Acknowledgement/Funding
Japan Agency for Medical Research and Development (18lm0203001j0002) and JSPS KAKENHI (18K15834)
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Affiliation(s)
- Y Obata
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - N Ishimori
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - A Saito
- Health Sciences University of Hokkaido, Cardiovascular Medicine, Sapporo, Japan
| | - S Kinugawa
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - I Nakano
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - N Kakutani
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - K Yamanashi
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
| | - T Anzai
- Hokkaido University, Cardiovascular Medicine, Sapporo, Japan
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13
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Nakano I, Hori H, Fukushima A, Yokota T, Kinugawa S, Takada S, Yamanashi K, Obata Y, Kitaura Y, Kakutani N, Abe T, Anzai T. Enhanced Echo Intensity of Skeletal Muscle Is Associated With Exercise Intolerance in Patients With Heart Failure. J Card Fail 2019; 26:685-693. [PMID: 31533068 DOI: 10.1016/j.cardfail.2019.09.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 08/27/2019] [Accepted: 09/03/2019] [Indexed: 12/22/2022]
Abstract
BACKGROUND Skeletal muscle is quantitatively and qualitatively impaired in patients with heart failure (HF), which is closely linked to lowered exercise capacity. Ultrasonography (US) for skeletal muscle has emerged as a useful, noninvasive tool to evaluate muscle quality and quantity. Here we investigated whether muscle quality based on US-derived echo intensity (EI) is associated with exercise capacity in patients with HF. METHODS AND RESULTS Fifty-eight patients with HF (61 ± 12 years) and 28 control subjects (58 ± 14 years) were studied. The quadriceps femoris echo intensity (QEI) was significantly higher and the quadriceps femoris muscle thickness (QMT) was significantly lower in the patients with HF than the controls (88.3 ± 13.4 vs 81.1 ± 7.5, P= .010; 5.21 ± 1.10 vs 6.54 ±1.34 cm, P< .001, respectively). By univariate analysis, QEI was significantly correlated with age, peak oxygen uptake (VO2), and New York Heart Association class in the HF group. A multivariable analysis revealed that the QEI was independently associated with peak VO2 after adjustment for age, gender, body mass index, and QMT: β-coefficient = -11.80, 95%CI (-20.73, -2.86), P= .011. CONCLUSION Enhanced EI in skeletal muscle was independently associated with lowered exercise capacity in HF. The measurement of EI is low-cost, easily accessible, and suitable for assessment of HF-related alterations in skeletal muscle quality.
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Affiliation(s)
- Ippei Nakano
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Hiroaki Hori
- Department of Rehabilitation, Hokkaido University Hospital, Sapporo, Japan
| | - Arata Fukushima
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
| | - Takashi Yokota
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shintaro Kinugawa
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Shingo Takada
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Katsuma Yamanashi
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yoshikuni Obata
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yasuyuki Kitaura
- Laboratory of Nutritional Biochemistry, Department of Applied Molecular Biosciences, Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Naoya Kakutani
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Takahiro Abe
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
| | - Toshihisa Anzai
- Department of Cardiovascular Medicine, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan
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Kitamura M, Tateishi Y, Sato S, Obata Y, Mochizuki Y, Funakoshi S, Matsuo T, Tsujino A, Nishino T. MON-144 ASSOCIATION BETWEEN SERUM CALCIUM LEVELS AND THE PROGNOSIS, HEMATOMA VOLUME, AND THE ONSET OF CEREBRAL HEMORRHAGE IN PATIENTS UNDERGOING HEMODIALYSIS. Kidney Int Rep 2019. [DOI: 10.1016/j.ekir.2019.05.936] [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: 10/26/2022] Open
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15
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Ishida K, Nakazawa N, HIrano N, Uchida Y, Omote M, Obata Y. LB1532 Syntheses and physicochemical investigations of optically active ceramide NDS. J Invest Dermatol 2018. [DOI: 10.1016/j.jid.2018.06.065] [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: 11/24/2022]
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16
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Obata Y, Ohta N, Moriwaki T, Ishida K, Uchida Y, Takayama K. 429 The ratio of sphingosine to sphinganine in the stratum corneum determines lipid lamellar structure packing. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Obata Y, Horikawa K, Takahashi T, Akieda Y, Tsujimoto M, Fletcher JA, Esumi H, Nishida T, Abe R. Oncogenic signaling by Kit tyrosine kinase occurs selectively on the Golgi apparatus in gastrointestinal stromal tumors. Oncogene 2017; 36:3661-3672. [PMID: 28192400 PMCID: PMC5500841 DOI: 10.1038/onc.2016.519] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Revised: 12/13/2016] [Accepted: 12/27/2016] [Indexed: 02/06/2023]
Abstract
Gastrointestinal stromal tumors (GISTs) are caused by gain-of-function mutations in the Kit receptor tyrosine kinase. Most primary GIST patients respond to the Kit inhibitor imatinib, but this drug often becomes ineffective because of secondary mutations in the Kit kinase domain. The characteristic intracellular accumulation of imatinib-sensitive and -resistant Kit protein is well documented, but its relationship to oncogenic signaling remains unknown. Here, we show that in cancer tissue from primary GIST patients as well as in cell lines, mutant Kit accumulates on the Golgi apparatus, whereas normal Kit localizes to the plasma membrane (PM). In imatinib-resistant GIST with a secondary Kit mutation, Kit localizes predominantly on the Golgi apparatus. Both imatinib-sensitive and imatinib-resistant Kit (Kit(mut)) become fully auto-phosphorylated only on the Golgi and only if in a complex-glycosylated form. Kit(mut) accumulates on the Golgi during the early secretory pathway, but not after endocytosis. The aberrant kinase activity of Kit(mut) prevents its export from the Golgi to the PM. Furthermore, Kit(mut) on the Golgi signals and activates the phosphatidylinositol 3-kinase–Akt (PI3K–Akt) pathway, signal transducer and activator of transcription 5 (STAT5), and the Mek–Erk pathway. Blocking the biosynthetic transport of Kit(mut) to the Golgi from the endoplasmic reticulum inhibits oncogenic signaling. PM localization of Kit(mut) is not required for its signaling. Activation of Src-family tyrosine kinases on the Golgi is essential for oncogenic Kit signaling. These results suggest that the Golgi apparatus serves as a platform for oncogenic Kit signaling. Our study demonstrates that Kit(mut)’s pathogenicity is related to its mis-localization, and may offer a new strategy for treating imatinib-resistant GISTs.
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Affiliation(s)
- Y Obata
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - K Horikawa
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - T Takahashi
- Department of Surgery, Osaka University, Graduate School of Medicine, Suita, Osaka, Japan
| | - Y Akieda
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - M Tsujimoto
- Department of Diagnostic Pathology, Osaka Police Hospital, Osaka, Osaka, Japan
| | - J A Fletcher
- Department of Pathology, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - H Esumi
- Division of Clinical Research, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
| | - T Nishida
- National Cancer Center Hospital, Chuo-ku, Tokyo, Japan
| | - R Abe
- Division of Immunobiology, Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan
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Nakao M, Takahashi M, Motoi K, Hagiwara H, Obata Y, Sakai H, Kinugawa S, Okita K. Analysis of Expired Gas During the Hemodialysis in Patients With Cardiovascular Disease. J Card Fail 2016. [DOI: 10.1016/j.cardfail.2016.07.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kato H, Kawashima S, Mimuro S, Obata Y, Doi M, Nakajima Y. An evaluation of deep-forehead temperature (spoton®) in ICU patients after cardiac surgery. Intensive Care Med Exp 2015. [PMCID: PMC4797347 DOI: 10.1186/2197-425x-3-s1-a111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Abstract
In the development of a new polymer and a new compound, mixing equipment plays an important role. However, the properties of a compound tend to vary depending on the size and shape of the equipment used and a means to obtain the same compound by a small scale laboratory mixer as the one obtained by a large scale mixer has been longed for a long time.
As a rubber compound is characterized by the physical properties, they are affected both by the dimensions and shape of the equipment and the mixing conditions. Recently, we developed a laboratory mixer generally following the designs of FH Banbury with exchangeable rotors and mixing chamber blocks which enable us to investigate the influences of the shape of equipment as well as the mixing conditions.
In analysing rubber mixing, we found that the following factors should be taken into account, that is, unit-work which is the applied energy to the unit volume of the material during mixing, Mooney viscosity of the compound, bound rubber which is the amount of polymer unextractable from the compound by a solvent, and weight average molecular weight of polymer extractable by a solvent. If the values of the four factors are close enough for the two compounds obtained by different mixers of different size and shape, one may regard them as the same compounds. Furthermore, we experimentally measured the four factors for the compounds of typical formulations of three species of commercially available rubbers, that is, styrene butadiene rubber, ethylene propylene rubber and butadiene, and expressed the values of the factors as functions of mixing conditions and the parameters of rotor shapes by means of multiple regression analysis. Among the rotor parameters, the following showed significant effects: tip clearance, tip width, total bulkiness and wing overlap ratio. As for the mixing conditions, mixing time, rotor speed and mixing temperature were dominant.
Using the functions obtained by the above mentioned method for the laboratory scale mixer, we tried to find the combinations of rotor shapes and mixing conditions that reproduced the compound mixed by large scale mixers. The optimum parameters of a laboratory mixer for the reproduction of the mixing of an industrial mixer were found to be larger rotor tip clearance, larger rotor tip width, larger wing overlap ratio, higher mixing temperature, and higher rotor speed than those of proportionally reduced dimensions and comparable conditions.
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Affiliation(s)
| | - K. Yagii
- Japan Synthetic Rubber, Yokkaichi, Japan
| | - Y. Obata
- Japan Synthetic Rubber, Yokkaichi, Japan
| | - S. Kimura
- Japan Synthetic Rubber, Yokkaichi, Japan
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Kawanishi K, Yagii K, Obata Y, Kimura S. Relationship between Rotor Designs in an Internal Mixer and Physical Properties of Mixed Rubber Compounds. INT POLYM PROC 2013. [DOI: 10.3139/217.910111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Internal mixers are commonly used for rubber compounding in industry. However, the relations among the designs of equipments, mixing conditions and the properties of the resulting compound are little known. In this paper we tried to reveal some manners of the relations concentrating, particularly, on rotor designs. A specially designed internal mixer (Banbury type) was developed. A number of double winged rotors of various shapes and replaceable mixing chambers were prepared. In developing the equipment, eight parameters were taken into consideration concerning the shape of rotors, that is, lengths, twist angles and overlap ratio of the wings, width and clearance at the rotor tip, angles of flow-in and flow-out at the gap area and total bulkiness of the rotor. Measured properties concerning mixing are: unit work, Mooney viscosity of dumped compound, the amount of bound rubber, weight average molecular weight of the extracted portion of the compound, and peaks in a torque curve, i.e., values of first peak torque and second peak time. In order to estimate the degree of influences of the design parameters mentioned above and mixing conditions, each measured properties were expressed as functions of these parameters by means of multiple regression analysis.
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Affiliation(s)
- K. Kawanishi
- Development Center, Japan Synthetic Rubber, Yokkaichi, Japan
| | - K. Yagii
- Development Center, Japan Synthetic Rubber, Yokkaichi, Japan
| | - Y. Obata
- Development Center, Japan Synthetic Rubber, Yokkaichi, Japan
| | - S. Kimura
- Development Center, Japan Synthetic Rubber, Yokkaichi, Japan
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22
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Ito M, Emami-Naini A, Keyvandarian N, Moeinzadeh F, Mortazavi M, Taheri S, Io K, Nishino T, Obata Y, Kitamura M, Abe S, Koji T, Kohno S, Wakabayashi K, Hamada C, Nakano T, Kanda R, Io H, Horikoshi S, Tomino Y, Korte MR, Braun N, Habib SM, Goffin E, Summers A, Heuveling L, Betjes MGH, Lambie M, Bankart J, Johnson D, Mactier R, Phillips-Darby L, Topley N, Davies S, Liu FX, Leipold R, Arici M, Farooqui U, Cho KH, Do JY, Kang SH, Park JW, Yoon KW, Jung SY, Sise C, Rutherford P, Kovacs L, Konings S, Pestana M, Zimmermann J, Cramp H, Stein D, Bang K, Shin JH, Jeong J, Kim JH, Matsuo N, Maruyama Y, Nakao M, Tanno Y, Ohkido I, Hayakawa H, Yamamoto H, Yokoyama K, Hosoya T, Iannuzzella F, Corradini M, Belloni L, Stefani A, Parmeggiani M, Pasquali S, Svedberg O, Stenvinkel P, Qureshi AR, Barany P, Heimburger O, Leurs P, Anderstam B, Waniewski J, Antosiewicz S, Baczynski D, Galach M, Wankowicz Z, Prabhu M, Subhramanyam SV, Nayak KS, Hwang JC, Jiang MY, Lu YH, Wang CT, Santos C, Rodriguez-Carmona A, Perez Fontan M, Schaefer B, Macher-Goeppinger S, Bayazit A, Sallay P, Testa S, Holland-Cunz S, Querfeld U, Warady BA, Schaefer F, Schmitt CP, Guney I, Turkmen K, Yazici R, Aslan S, Altintepe L, Yeksan M, Kocyigit I, Sipahioglu M, Orscelik O, Unal A, Celik A, Abbas S, Zhu F, Tokgoz B, Dogan A, Oymak O, Kotanko P, Levin N, Sanchez-Gonzalez MC, Gonzalez-Casaus ML, Gonzalez-Parra E, Albalate M, Lorenzo V, Torregrosa V, Fernandez E, de la Piedra C, Rodriguez M, Zeiler M, Monteburini T, Agostinelli RM, Marinelli R, Santarelli S, Bermond F, Bagnis C, Marcuccio C, Soragna G, Bruno M, Vitale C, Marangella M, Martino F, Scalzotto E, Rodighiero MP, Crepaldi C, Ronco C, Seferi S, Rroji M, Likaj E, Barbullushi M, Thereska N, Kim EJ, Han JH, Koo HM, Doh FM, Kim CH, Ko KI, Lee MJ, Oh HJ, Han SH, Yoo TH, Choi KH, Kang SW, Uzun S, Karadag S, Yegen M, Gursu M, Ozturk S, Aydin Z, Sumnu A, Cebeci E, Atalay E, Kazancioglu R, Alscher D, Fritz P, Latus J, Kimmel M, Biegger D, Lindenmeyer M, Cohen CD, Wuthrich RP, Segerer S, Braun N, Kim YK, Kim HW, Song HC, Choi EJ, Yang CW, Matsuda A, Tayama Y, Ogawa T, Iwanaga M, Okazaki S, Hatano M, Kiba T, Shimizu T, Hasegawa H, Mitarai T, Dratwa M, Collart F, Verger C, Tayama Y, Hasegawa H, Takayanagi K, Iwashita T, Shimizu T, Noiri C, Kiba T, Ogawa T, Inamura M, Nakamura S, Matsuda A, Kato H, Mitarai T, Unal A, Sipahioglu MH, Kocyigit I, Elmali F, Tokgoz B, Oymak O, Zhang X, Ma J, Giuliani A, Blanca-Martos L, Nayak Karopadi A, Mason G, Crepaldi C, Ronco C, Santos MT, Fonseca I, Santos O, Rocha MJ, Carvalho MJ, Cabrita A, Rodrigues A, Scabbia L, Domenici A, Apponi F, Tayefeh Jafari M, Sivo F, Falcone C, Punzo G, Mene P, Yildirim T, Yilmaz R, Azak A, Altindal M, Turkmen E, Arici M, Altun B, Duranay M, Erdem Y, Buyukbakkal M, Eser B, Yayar O, Ercan Z, Kali A, Erdogan B, Haspulat A, Merhametsiz O, Yildirim T, Ulusal-Okyay G, Akdag SI, Ayli MD, Pietrzycka A, Miarka P, Chowaniec E, Sulowicz W, Lutwin M, Gaska M, Paciorek A, Karadag S, Gursu M, Ozturk S, Aydin Z, Uzun S, Sumnu A, Cebeci E, Atalay E, Kazancioglu R. Peritoneal dialysis - A. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft117] [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: 11/14/2022] Open
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23
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Baden MY, Yamada Y, Obata Y, Hosakawa Y, Saisho K, Tamba S, Yamamoto K, Umeda M, Furubayashi A, Tsukamoto Y, Matsuzawa Y. Serum adiponectin level is not only decreased in metabolic syndrome but also in borderline metabolic abnormalities. Nutr Diabetes 2011; 1:e18. [PMID: 23455020 PMCID: PMC3302140 DOI: 10.1038/nutd.2011.13] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Objective: Along with the increasing prevalence of obesity and related diseases, particularly atherosclerotic diseases, metabolic syndrome (MetS) is now a common and major public health issue in many countries around the world. Adiponectin, a protein secreted by the adipose tissue, has become recognized as a key player in the development of MetS. These days, not only MetS but also borderline metabolic/physiological abnormalities, such as impaired fasting glucose, high normal blood pressure and high normal plasma cholesterol, have been reported to be risk factors for atherosclerotic disease. Therefore, we undertook this study to determine the relationship between adiponectin and borderline metabolic/physiological abnormalities, as well as MetS. Design: A cross-sectional study performed from April 2007 to November 2009. Subjects: In 16 892 Japanese adults (10 008 men and 6884 women), we examined the relationship between the serum adiponectin concentration and borderline metabolic/physiological abnormalities or MetS by a questionnaire survey about medical treatment, body size measurement and measurement of laboratory parameters including the serum adiponectin concentration. Results: Adiponectin showed a significant negative correlation with the number of MetS components. In subjects without overt diabetes mellitus, hypertension or dyslipidemia, the adiponectin concentration also showed a significant negative correlation with the number of borderline metabolic abnormalities. Conclusion: The decrease of circulating adiponectin may start before the development of diabetes mellitus, hypertension, dyslipidemia or MetS. Adiponectin is an important biomarker for reflecting the adverse influence of visceral fat in persons with MetS, and also in these subclinical states.
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Affiliation(s)
- M Y Baden
- Department of Endocrinology and Metabolism, Sumitomo Hospital, Osaka, Japan
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24
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Shimozato T, Igarashi Y, Itoh Y, Yamamoto N, Okudaira K, Tabushi K, Obata Y, Komori M, Naganawa S, Ueda M. Scattered radiation from dental metallic crowns in head and neck radiotherapy. Phys Med Biol 2011; 56:5525-34. [PMID: 21813962 DOI: 10.1088/0031-9155/56/17/005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
We aimed to estimate the scattered radiation from dental metallic crowns during head and neck radiotherapy by irradiating a jaw phantom with external photon beams. The phantom was composed of a dental metallic plate and hydroxyapatite embedded in polymethyl methacrylate. We used radiochromic film measurement and Monte Carlo simulation to calculate the radiation dose and dose distribution inside the phantom. To estimate dose variations in scattered radiation under different clinical situations, we altered the incident energy, field size, plate thickness, plate depth and plate material. The simulation results indicated that the dose at the incident side of the metallic dental plate was approximately 140% of that without the plate. The differences between dose distributions calculated with the radiation treatment-planning system (TPS) algorithms and the data simulation, except around the dental metallic plate, were 3% for a 4 MV photon beam. Therefore, we should carefully consider the dose distribution around dental metallic crowns determined by a TPS.
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Affiliation(s)
- T Shimozato
- Department of Radiological Technology, Nagoya University School of Health Sciences, 1-1-20 Daikohminami, Higashi-ku, Nagoya, Aichi 461-8673, Japan.
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25
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Obata Y, Furusu A, Miyazaki M, Nishino T, Kawazu T, Kanamoto Y, Nishikido M, Taguchi T, Kohno S. Glomerulocystic kidney disease in an adult with enlarged kidneys: a case report and review of the literature. Clin Nephrol 2011; 75:158-164. [PMID: 21255546] [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: 05/30/2023] Open
Abstract
We report the case of a 31-year-old male with enlarged kidneys and glomerulocystic kidney disease (GCKD). The patient had no family history of renal disease or other diseases. On initial presentation he complained of poor eyesight, and hypertensive retinopathy and elevated serum creatinine (5.0 mg/dl) were found at that time. Renal biopsy showed cystic dilatation of Bowman's capsule and atrophy of the glomerular tuft. Thus, an adult case of sporadic GCKD was diagnosed. Based on previous reports, kidney size in patients with adult type GCKD varies from small to large. Our patient's kidneys are the largest ever reported (right kidney was 22 cm×10 cm, left kidney was 19 cm×10 cm). A review of the literature dealing with sporadic adult GCKD suggested that it is difficult to diagnose this disease early in its course.
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Affiliation(s)
- Y Obata
- Second Department of Internal Medicine, Nagasaki University School of Medicine, Career Development Center for Medical Doctor, Nagasaki University Hospital, Nagasaki, Japan
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26
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Oribe Y, Shimizu H, Uchiyama Y, Obata Y. Possibility of Utilization of the Calcification in Image-guided Radiotherapy for Prostate Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Kadoya N, Kato T, Suzuki M, Kagiya M, Saito T, Nakamura T, Tomoda T, Takada A, Fuwa N, Obata Y. Dose-volume Comparison of Proton Radiotherapy and Stereotactic Body Radiotherapy for Non-small Cell Lung Cancer. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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28
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Habara K, Shimozato T, Obata Y, Ryota K, Yasui K, Aoyama Y, Hayashi N. Dosimetric Perturbation Due to Scattered Ray from a Gold Marker for Tumor Tracking In Radiotherapy Planning. Int J Radiat Oncol Biol Phys 2010. [DOI: 10.1016/j.ijrobp.2010.07.1907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Okumura M, Obata Y, Shimomura K, Tamura M, Nishimura Y. The effect of gantry and collimator angles on leaf limited velocity and position in dynamic multileaf collimator intensity-modulated radiation therapy. Phys Med Biol 2010; 55:3101-13. [PMID: 20463373 DOI: 10.1088/0031-9155/55/11/008] [Citation(s) in RCA: 11] [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] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The purpose of the study is to evaluate the limiting velocity (LV) of a multileaf collimator and the leaf position in various collimator and gantry angles. Both leading leaves and trailing leaves began to move with a constant acceleration from 0 to 4 cm s(-1). When the beam hold occurred, the leaf velocity was defined as the leaf LV. Dynamic irradiation was performed at eight gantry angles of every 45 degrees with three different collimator angles. The analysis of the LV and the leaf position was performed with a log file from a leaf motion controller. The mean LVs for Varian Clinac 21EX (21EX) ranged from 2.51 to 3.10 cm s(-1). The mean LVs for Clinac 600C ranged from 2.91 to 3.12 cm s(-1). When only central 5 mm leaves of 21EX moved, LVs were significantly higher than those when all 60 pairs of leaf moved, while the leaf position inconsistencies of the two accelerators were within 1 mm at the leaf velocities from 0.5 to 2.0 cm s(-1). It was recognized that the LV was affected by gravity. This measurement method can be utilized as routine quality assurance for a dynamic multileaf collimator (DMLC) is and easily reproducible.
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Affiliation(s)
- M Okumura
- Program in Radiological and Medical Laboratory Sciences, Nagoya University Graduate School of Medicine, Nagoya, Japan. m
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30
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Oshima T, Aoyama Y, Shimozato T, Sawaki M, Imai T, Ito Y, Obata Y, Tabushi K. An experimental attenuation plate to improve the dose distribution in intraoperative electron beam radiotherapy for breast cancer. Phys Med Biol 2009; 54:3491-500. [DOI: 10.1088/0031-9155/54/11/014] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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31
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Oota S, Mekada K, Fujita Y, Humphries J, Fukami-Kobayashi K, Obata Y, Rowe T, Yoshiki A. Four-dimensional quantitative analysis of the gait of mutant mice using coarse-grained motion capture. Annu Int Conf IEEE Eng Med Biol Soc 2009; 2009:5227-5230. [PMID: 19964861 DOI: 10.1109/iembs.2009.5334287] [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: 05/28/2023]
Abstract
To analyze an abnormal gait pattern in mutant mice (Hugger), we conducted coarse-grained motion capture. Using a simple retroreflective marker-based approach, we could detect high-resolution mutant-specific gait patterns. The phenotypic gait patterns are caused by extreme vertical motion of limbs, revealing inefficient motor functions. To elucidate the inefficiency, we developed a musculoskeletal computer model of the mouse hindlimb based on X-ray CT data. By integrating motion data with the model, we determined mutant-specific musculotendon lengths, suggesting that three major muscles were involved in the abnormal gait. This approach worked well on laboratory mice, which were putatively too small to be motion capture subjects. Motion capture technology was originally developed for human study, and our approach may help fill neuroscience gaps between mouse and human behavioral phenotypes.
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Affiliation(s)
- S Oota
- RIKEN BioResource Center, Tsukuba, Japan.
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32
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Hatta I, Nakazawa H, Obata Y, Ohta N, Inoue K, Yagi N. SAXD/WAXD study on structural change of intercellular lipid matrix in skin by applying chemicals. Acta Crystallogr A 2008. [DOI: 10.1107/s0108767308079646] [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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33
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Obata R, Obata Y, Adachi YU, Sato S. Successful intubation in a patient with extreme lingual tonsil hypertrophy using an intubating laryngeal mask. Acta Anaesthesiol Scand 2008; 52:1030. [PMID: 18702760 DOI: 10.1111/j.1399-6576.2008.01676.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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34
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Sakauchi K, Takebe T, Uehara H, Yamada T, Obata Y, Kanai T. Influence of Cooling Water Temperature on Properties of LLDPE Film in Double Bubble Tubular Film Process. Journal of Polymer Engineering 2008. [DOI: 10.1515/polyeng.2008.28.4.243] [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: 11/15/2022]
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Takagi H, Takenaka K, Kobayashi H, Koizumi M, Hirose Y, Obata Y, Goto H, Hattori T. New Monitoring System for Setting Position, and for Checking During Irradiation and in the Course of Radiotherapy. Int J Radiat Oncol Biol Phys 2007. [DOI: 10.1016/j.ijrobp.2007.07.2058] [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: 10/22/2022]
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36
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.Sakauchi K, Takebe T, Uehara H, Yamada T, Obata Y, Kanai T. INFLUENCE OF COOLING WATER TEMPERATURE ON FILM STRETCHABILITY, SUPERSTRUCTURE AND FILM PHYSICAL PROPERTIES OF RANDOM COPOLYPROPYLENE IN DOUBLE BUBBLE TUBULAR PROCESS. Journal of Polymer Engineering 2007. [DOI: 10.1515/polyeng.2007.27.6-7.447] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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37
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Kikuchi S, Obata Y, Yagyu K, Lin Y, Nakajima T, Kobayashi O, Kikuichi M, Ohta K, Ushijima R. 3510 POSTER Serum vascular endothelial growth factor (VEGF), VEGF receptor-1 and -2 among gastric cancer patients and healthy subjects. EJC Suppl 2007. [DOI: 10.1016/s1359-6349(07)71013-3] [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: 11/16/2022] Open
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Nakade K, Pan J, Yoshiki A, Ugai H, Kimura M, Liu B, Li H, Obata Y, Iwama M, Itohara S, Murata T, Yokoyama KK. JDP2 suppresses adipocyte differentiation by regulating histone acetylation. Cell Death Differ 2007; 14:1398-405. [PMID: 17464331 DOI: 10.1038/sj.cdd.4402129] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Among the events that control cellular differentiation, the acetylation of histones plays a critical role in the regulation of transcription and the modification of chromatin. Jun dimerization protein 2 (JDP2), a member of the AP-1 family, is an inhibitor of such acetylation and contributes to the maintenance of chromatin structure. In an examination of Jdp2 'knock-out' (KO) mice, we observed elevated numbers of white adipocytes and significant accumulation of lipid in the adipose tissue in sections of scapulae. In addition, mouse embryo fibroblasts (MEFs) from Jdp2 KO mice were more susceptible to adipocyte differentiation in response to hormonal induction and members of the CCAAT/enhancer-binding proteins (C/EBP) gene family were expressed at levels higher than MEFs from wild-type mice. Furthermore, JDP2 inhibited both the acetylation of histone H3 in the promoter of the gene for C/EBPdelta and transcription from this promoter. Our data indicate that JDP2 plays a key role as a repressor of adipocyte differentiation by regulating the expression of the gene for C/EBPdelta via inhibition of histone acetylation.
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Affiliation(s)
- K Nakade
- Gene Engineering Division, RIKEN, 3-1-1 Koyadai, Tsukuba Science City, Ibaraki 305-0074, Japan
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Kono T, Kawahara M, Wu Q, Hiura H, Obata Y. Paternal dual barrier by Ifg2-H19 and Dlk1-Gtl2 to parthenogenesis in mice. Ernst Schering Res Found Workshop 2007:23-33. [PMID: 16903414 DOI: 10.1007/3-540-31437-7_3] [Citation(s) in RCA: 4] [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] [Subscribe] [Scholar Register] [Indexed: 03/20/2023]
Abstract
The functional difference between the maternal and paternal genome, which is characterized by epigenetic modifications during gametogenesis, that is genomic imprinting, prevents mammalian embryos from parthenogenesis. Genomic imprinting leads to nonequivalent expression of imprinted genes from the maternal and paternal alleles. However, our research showed that alteration of maternal imprinting by oocyte reconstruction using nongrowing oocytes together with deletion of the H19 gene, provides appropriate expression of maternally imprinted genes. Here we discuss that further alteration of paternally imprinted gene expressions at chromosomes 7 and 12 allows the ng/fg parthenogenetic embryos to develop to term, suggesting that the paternal contribution is obligatory for the descendant.
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Affiliation(s)
- T Kono
- Department of BioScience, Tokyo, University of Agriculture, Japan.
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Obata Y, Kono T. 254 DEVELOPMENTAL COMPETENCE OF MOUSE OOCYTES AFTER IN VITRO GROWTH, NUCLEAR TRANSFER, AND IN VITRO FERTILIZATION. Reprod Fertil Dev 2007. [DOI: 10.1071/rdv19n1ab254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Long-term effects of in vitro maturation of oocytes and in vitro culture of fertilized eggs have been reported in ruminants, mice, and humans. However, effects of in vitro oocyte growth are unknown. Although a large number of non-growing oocytes can be a gamete resource, very few oocytes ever acquire competence to support full-term development after in vitro growth. The objective of the study was to evaluate different culture conditions and the long-term effects of in vitro oocyte growth on the production of offspring. Oocytes of newborn, 10-day-old, and adult BDF1 (C57BL/6N � DBA2) mice were cultured for 22, 11, and 1 day(s), respectively. The results showed that alpha-MEM medium was superior to Waymouth medium in oocyte growth (68.6 � 3.87 �m vs. 61.7 � 3.26 �m, respectively; P < 0.001), and in maintenance of follicular integrity (69% vs. 30%; P < 0.001) when non-growing oocytes from newborn mice were cultured. However, oocytes grown in vitro were incompetent to support meiotic maturation by themselves in the case of either the 22-day culture of oocytes from newborn mice (1/59 in alpha-MEM vs. 1/65 in Waymouth) or the 11-day culture of oocytes from 10-day-old mice (51/140 in alpha-MEM vs. 2/157 in Waymouth), and none of them developed to the blastocyst stage. Subsequently, to examine the nucleic competence of oocytes grown in vitro, serial nuclear transfers were carried out. Karyoplasts from oocytes grown in vitro using alpha-MEM were fused with the GV oocytes grown in vivo after enucleation. The reconstituted oocytes were cultured in alpha-MEM. After 14 h, MII chromosomes of the reconstituted oocytes were transferred into the enucleated and ovulated MII oocytes in order to provide cytoplasmic competency. The results showed that when the donor oocytes attained a diameter of e60 �m, the reconstituted oocytes could develop into pups at extremely high rates (30-41%) after in vitro fertilization (IVF) and embryo transfer in the case of either the 22-day culture of oocytes from newborn mice (7/17) or the 11-day culture of oocytes from 10-day-old mice (25/77). A significant difference was not observed in the competence to develop to term of the reconstituted oocytes when compared with that of the oocytes reconstituted from the control GV (25/52; P > 0.05). When the donor oocytes attained a diameter of 50–60 �m, the reconstituted oocytes also could develop into pups (7/33); however, their efficiency was significantly reduced when compared with that of the reconstituted oocytes from the control GV (P < 0.05). On the other hand, the weight of the offspring depended on the duration of culture, and offspring from non-growing oocytes (1.48 � 0.17 g) were heavier than those of the IVF control (1.25 � 0.14 g; P < 0.05). In conclusion, we have demonstrated that using a nuclear transfer technique combined with in vitro growth of oocytes was sufficient to produce functional oocytes, and long-term culture for oocyte growth did not affect the nucleic ability of oocytes to develop to term; however, fetal growth may be susceptible to the duration of culture.
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Ogonuki N, Mochida K, Shinmen A, Ohkawa M, Miki H, Inoue K, Fray M, Moriwaki K, Obata Y, Ogura A. 358 MICROINSEMINATION USING MALE GERM CELLS FROM EPIDIDYMIDES AND TESTES STORED IN FREEZERS WITHOUT CRYOPROTECTANT. Reprod Fertil Dev 2006. [DOI: 10.1071/rdv18n2ab358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Cryopreservation of male germ cells is a strategy for the conservation of species and strains valuable to biomedical researchers. However, to minimize damage that may occur during freezing and thawing, complex cryopreservation protocols that have been optimized for the stage and species of the male germ cell are usually employed. This study was undertaken to see whether mouse male germ cells could be safely cryopreserved for later use by freezing the whole epididymides and testes without cryoprotectant. Furthermore, we examined whether frozen male germ cells maintained their fertilization ability after international transportation on dry ice. Epididymides and testes were collected from sexually mature male ICR and C57BL/6Cr mice and placed in polypropylene cryotubes. The cryotubes were frozen at -80�C with or without a freezing container, or were plunged directly into liquid nitrogen (LN2). They were stored at -80�C or in LN2 from between one week and one year. Epididymides and testes were thawed by placing the cryotubes in a water bath at room temperature. B6D2F1 and C57BL/6Cr oocytes were microinseminated with either epididymal and testicular spermatozoa or round spermatids. After embryo transfer into pseudopregnant females, normal pups were obtained irrespective of the method of cryopreservation and cell type used. However, their birth rates (2-33%) were lower than those of our conventional microinsemination using fresh sperm or spermatids (20-60%). For transportation experiments, testes were collected from C57BL/6J mice and placed in a cryotube. The cryotubes were frozen at -80�C in a freezing container. On the day of transportation, the cryotubes were placed in a polystyrene foam case filled with dry ice and were transported from Harwell (UK) to Tsukuba (Japan) by air and land. After three days, the samples were delivered to the recipient facility and were stored at -80�C until use (about 1 month). After thawing and collection of spermatogenic cells, C57BL/6J oocytes were microinseminated with either testicular spermatozoa or elongated spermatids. After embryo transfer, 24 (34% per transfer) and 8 (16%) offspring, respectively, were obtained from the two groups. These results indicate that mouse male germ cells retain their nuclear integrity even after freezing epididymides or testes in freezers without cryoprotectant. Since this cryopreservation technique is very simple and allows storage at -80�C for at least several months, it may enable transportation of mouse male germ cells internationally on dry ice, even when the senders are not specialized in cryopreservation.
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Therade-Matharan S, Laemmel E, Carpentier S, Obata Y, Levade T, Duranteau J, Vicaut E. Reactive oxygen species production by mitochondria in endothelial cells exposed to reoxygenation after hypoxia and glucose depletion is mediated by ceramide. Am J Physiol Regul Integr Comp Physiol 2005; 289:R1756-62. [PMID: 16278342 DOI: 10.1152/ajpregu.00480.2004] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.9] [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: 01/10/2023]
Abstract
In endothelium, reoxygenation after hypoxia (H/R) has been shown to induce production of reactive oxygen species (ROS) by complex III of the mitochondrial respiratory chain. The purpose of the present study was to test the involvement of ceramide in this phenomenon. Human umbilical vein endothelial cells underwent 2 h of hypoxia (Po2, ∼20 mmHg) without glucose and 1 h of reoxygenation (Po2, ∼120 mmHg) with glucose. ROS production was measured by the fluorescent marker 2′,7′-dichlorodihydrofluorescein diacetate, and cell death by propidium iodide. We showed that 1) after 1 h of reoxygenation, fluorescence had risen and that ROS production was inhibited by desipramine, an inhibitor of sphingomyelinase, an enzyme responsible for ceramide production (126 ± 7% vs. 48 ± 12%, P < 0.05); 2) administration of ceramide ( N-acetylsphingosine) per se (i.e., in the absence of H/R) induced ROS production (65 ± 3%), which was inhibited by complex III inhibitor: antimycin A (24 ± 3%, P < 0.0001), or stigmatellin (31 ± 2%, P < 0.0001); 3) hypoxia/reoxygenation-induced ROS production was not affected by either ceramide-activated protein kinase inhibitor dimethyl aminopurine or mitochondrial permeability transition inhibitor cyclosporin A but was significantly inhibited by the antiapoptotic protein Bcl-2 (82 ± 8%, P < 0.05); 4) ceramide-induced ROS production was also inhibited by Bcl-2 (41 ± 4%, P < 0.0001). These results demonstrate that in endothelial cells submitted to hypoxia and glucose depletion followed by reoxygenation with glucose, the pathway implicated in mitochondrial complex III ROS production is ceramide dependent and is decreased by the antiapoptotic protein Bcl-2.
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Affiliation(s)
- S Therade-Matharan
- Laboratoire d'Etude de la Microcirculation, Faculté de Médecine, Université Paris 7 10, avenue de Verdun, 75010 Paris, France
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Takayama K, Obata Y, Morishita M, Nagai T. Multivariate spline interpolation as a novel method to optimize pharmaceutical formulations. Pharmazie 2004; 59:392-5. [PMID: 15212308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/29/2023]
Abstract
One of the difficulties in the quantitative approach for formulation design is the difficulty in understanding the actual relationship between causal factors and individual pharmaceutical responses. In this regard, several techniques were applied to determine the relationship between causal factors and the pharmaceutical responses. The generation of response surfaces using multivariate spline interpolation (MSI) has provided rapid and detailed information. Nevertheless, no application of MSI in the pharmaceutical field has been reported to date, even though it promises potential applications. To overcome the shortcomings of the classical response surface method, we newly developed a multi-objective simultaneous optimization method, in which MSI had been incorporated. The method was applied to the optimization problem of a transdermal hydrogel formulation for ketoprofen containing several chemical enhancers. Results suggested a superior function of the MSI approach.
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Affiliation(s)
- K Takayama
- Department of Pharmaceutics, Hoshi University, Ebara, Shinagawa, Tokyo, Japan
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Kono S, Suzuki A, Obata Y, Igarashi H, Bito H, Sato S. Vasopressin with delayed combination of nitroglycerin increases survival rate in asphyxia rat model. Resuscitation 2002; 54:297-301. [PMID: 12204464 DOI: 10.1016/s0300-9572(02)00156-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, vasopressin has been reported as a more effective drug than epinephrine (adrenaline) for cardiopulmonary resuscitation (CPR). However, vasopressin decreases myocardial blood flow (MBF) because of its strong vasoconstriction, to maintain better coronary perfusion pressure (CPP) compared with epinephrine. Nitroglycerin is well known to be able to maintain MBF and increase survival rate. In a VF model, vasopressin combined with nitroglycerin maintained CPP; however, low survival rates were observed compared with vasopressin alone. We investigated the effectiveness of the delayed use of nitroglycerin combined with vasopressin in a severe asphyxia model. Fourteen Sprague-Dawley male rats were divided into two groups: vasopressin 0.8 U/kg alone (V-Gr.), and nitroglycerin 0.3 microg/kg 45 s after the administration of 0.8 U/kg vasopressin (VN-Gr.). Six min after asphyxia induced by obstructing the tracheal tube, CPR was performed in two ways. Three animals resuscitated in the V-Gr. (42%) and six/seven (84%) in the VN-Gr. (P<0.05). In the 6 min of asphyxia rat model, vasopressin combined with delayed nitroglycerin is more effective than vasopressin alone.
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Affiliation(s)
- Shinichi Kono
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, Handayama 1-20-1, Shizuoka 4313192, Hamamatsu, Japan.
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Akatsuka Y, Goldberg TA, Kondo E, Martin EG, Obata Y, Morishima Y, Takahashi T, Hansen JA. Efficient cloning and expression of HLA class I cDNA in human B-lymphoblastoid cell lines. Tissue Antigens 2002; 59:502-11. [PMID: 12445320 DOI: 10.1034/j.1399-0039.2002.590607.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Analysis of HLA restriction specificity is one of the important steps in characterizing T cell clones. This usually requires either a panel of HLA-typed cells or HLA cDNA transfectants. Although preparation of HLA cDNA transfectants is laborious, utilization of transfectants is advantageous when a suitable panel is not available due to linkage disequilibrium or rarity of the HLA allele of interest. In this report, we describe an efficient and rapid HLA cloning and expression system. Three sets of PCR primers specific for HLA-A, B and C loci were designed by extensively sequencing 5'- and 3'- untranslated regions of HLA class I genes. The PCR-amplified products were introduced into modified Phoenix retrovirus vectors containing a puromycin resistant gene under the control of a LTR promotor. Gibbon ape leukemia virus (GALV)-pseudotyped retrovirus was produced and infected into B-lymphoid cell lines. Following expansion in selection media, more than 80% of cells expressed transduced HLA at a comparable level to that normally expressed. These results indicate that locus-specific PCR cloning and utilization of GALV-pseudotyped retroviral vector can be an effective and relatively efficient tool for constructing a panel of different HLA transfectants.
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Affiliation(s)
- Y Akatsuka
- Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
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Abstract
Epinephrine has been administered as a drug essential for cardiopulmonary resuscitation (CPR). Recently, vasopressin has been reported to be more effective than epinephrine for CPR in a ventricular fibrillation (VF) model. As a different myocardial pathology is speculated to exist between the VF model and the asphyxia model, we investigated whether vasopressin is also effective in a rat asphyxia model. Twenty-one Sprague-Dawley male rats were divided into three groups: vasopressin 0.8 U/kg (Vaso-Gr), epinephrine 0.05 mg/kg (Epi-Gr), and saline same volume as the other two drugs (Sal-Gr). Five minutes after suffocation induced by obstruction of the tracheal tube, CPR was performed using each drug. Although only one animal survived (17%) in the Sal-Gr, 6/7 (85%) survived in both Vaso-Gr and Epi-Gr (P<0.01). Vasopressin is as effective as epinephrine for CPR in asphyxia-induced rats.
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Affiliation(s)
- S Kono
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, Handacho 3600, Hamamatsu, Shizuoka 431 3192, Japan.
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Iwata H, Yamamoto M, Nemori R, Mizutani M, Iwase T, Miura S, Obata Y, Hara Y, Omoto Y, Toyama T, Yamashita H, Iwase H, Kobayashi S. Localization of gelatinolytic activity can be detected in breast cancer tissues by film in situ zymography. Breast Cancer 2001; 8:111-5. [PMID: 11342983 DOI: 10.1007/bf02967489] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Extracellular matrix-degrading proteinases secreted by malignant tumor cells have been thought to play an essential role in the processes of invasion and metastasis. However, existence and localization of gelatinase activity in breast cancer tissues have not been clarified. METHODS We developed a novel film for highly reproducible detection and the localization of gelatinolytic activity. This film has a gelatin layer with a constant thickness 7 microm, and adequate crosslinking to control the speed of degradation by proteases. Cryosections of several breast cancer tissues were put on this gelatin film and incubated for 16 hrs at 37 degrees C. After staining with ponceau 3R dye, the digested area was evaluated under light microscopy. RESULTS Digestion of gelatin was detected in more than 90%of breast cancer specimens, although it varied in degree and area for each case. In most cases, the gelatinolytic activity was located within cancer nests, and was not detected in stromal cells surrounding cancer cells. The gelatinolytic activity was inhibited by 1,10-phenanthroline, an inhibitor of matrix metalloproteinases (MMPs). CONCLUSIONS In this study, the localization of net MMP activity was confirmed in breast cancer nest using film in situ zymography. Detailed analysis on the relationship between the strength or distribution of MMP activity and malignancy are anticipated in the future.
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Affiliation(s)
- H Iwata
- Department of Breast Surgery, Aichi Cancer Center hospital, 1-1 kanokoden, chikusa-ku, Nagoya 464-8681, Japan
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Li CJ, Higashiyama K, Yoshimura Y, Nagai T, Takayama K, Obata Y. Promoting mechanism of menthol derivative, 1-O-ethyl-3-buthylcyclohexanol, on the percutaneous absorption of ketoprofen. Biol Pharm Bull 2001; 24:1044-8. [PMID: 11558566 DOI: 10.1248/bpb.24.1044] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Menthol derivatives were synthesized and evaluated for their promoting activity on the percutaneous absorption of ketoprofen and skin irritation in vivo, choosing O-ethylmenthol (MET) as the mother compound. The compound having a C-3 positionned n-butyl group (1-O-ethyl-3-n-buthylcyclohexanol, OEBC) indicated the most promoting activity and caused relatively little skin irritation. In order to understand enhancement mechanism of OEBC an in vitro permeation study of ketoprofen was performed. The time course of the cumulative amounts of drug permeated through the rat skin exhibited a linear relation after an initial lag time. This was analyzed in membrane diffusion model and the diffusion and partition parameters of ketoprofen were estimated. Both parameters were remarkably enhanced when a hydrogel containing a small quantity of OEBC (0.5%) was applied. Furthermore, to clarify the site of action of OEBC, we also investigated in vitro permeation study of ketoprofen employing different skins of state, reversed skin and stratum corneum stripped skin. When OEBC was added to the hydrogels which were applied to the reversed and stripped skins, almost no changes of the flux were observed compared with the control (without OEBC). These results suggested that the site of action of OEBC was stratum corneum. Morphological changes of the stratum corneum surface were microscopically observed with 0-2% OEBC. The spaces between the stratum corneum cells treated with 0.5-2% OEBC became extended and the shape of each cell became clear. This may suggest that the site of action of OEBC was the intercellular of stratum corneum. Furthermore, an electron spin resonance study was performed to investigate the effect of OEBC on the intercellular lipid bilayer fluidity of the stratum corneum and the rotational correlation times were calculated. 2,2,6,6-Tetramethylpiperidine-1-oxyl (TEMPO) and 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPOL) were used as the spin label. In use of OEBC, the fluidity of TEMPO labeled the stratum corneum lipid increased as the addition of OEBC. The results suggested that OEBC promote the penetration of drugs by enhancing fluidity of the local lipid bilayers around TEMPO.
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Affiliation(s)
- C J Li
- Department of Pharmaceutics, Hoshi University, Tokyo, Japan
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Song J, Ugai H, Ogawa K, Wang Y, Sarai A, Obata Y, Kanazawa I, Sun K, Itakura K, Yokoyama KK. Two consecutive zinc fingers in Sp1 and in MAZ are essential for interactions with cis-elements. J Biol Chem 2001; 276:30429-34. [PMID: 11395515 DOI: 10.1074/jbc.m103968200] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The zinc finger proteins Sp1 and Myc-associated zinc finger protein (MAZ) are transcription factors that control the expression of various genes. Regulation of transcription by these factors is based on interactions between GC-rich DNA-binding sites (GGGCGG for Sp1 and GGGAGGG for MAZ) and the carboxyl-terminal zinc finger motifs of the two proteins. Sp1 and MAZ have three and six zinc fingers, respectively, and the details of their interactions with cis-elements remain to be clarified. We demonstrate here that Sp1 and MAZ interact with the same GC-rich DNA-binding sites, apparently sharing DNA-binding sites with each other. We found that the DNA binding activities of Sp1 and MAZ depended mainly on consecutive zinc fingers, namely the second and third zinc fingers in Sp1 and the third and fourth zinc fingers in MAZ. Furthermore, the interactions of the zinc finger proteins with the same cis-elements appear to play a critical role in the regulation of gene expression. It seems plausible that two consecutive zinc finger motifs in a zinc finger protein might be essential for interaction of the protein with DNA.
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Affiliation(s)
- J Song
- RIKEN (The Institute of Physical and Chemical Research), Tsukuba Institute, Bioresource Center, 3-1-1 Koyadai, Tsukuba, Ibaraki 305-0074, Japan
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Wu PC, Obata Y, Fujikawa M, Li CJ, Higashiyama K, Takayama K. Simultaneous optimization based on artificial neural networks in ketoprofen hydrogel formula containing O-ethyl-3-butylcyclohexanol as percutaneous absorption enhancer. J Pharm Sci 2001; 90:1004-14. [PMID: 11536204 DOI: 10.1002/jps.1053] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The influence of the amounts of additives including 1-O-ethyl-3-n-butylcyclohexanol (OEBC), diisopropyl adipate (DIA), and isopropanol (IPA) on the penetration rate (R(p)) of ketoprofen from hydrogels through rat skin in vivo was investigated. Skin irritation evoked by the application of hydrogels was evaluated based on a microscopic observation of skin cross-sections. Both optimization techniques incorporating an artificial neural network (ANN) and a second-order polynomial regression analysis were applied to the optimization of ketoprofen hydrogel formulations. Findings indicated that the R(p) and total irritation score (TIS) of the skin were predicted quantitatively as a function of quantities of OEBC, DIA, and IPA, employing ANN. In contrast, the prediction ability of the polynomial regression equation was somewhat poorer compared with that of ANN. The observed results of R(p) and TIS in the optimal formulation coincided well with the predictions in the simultaneous optimization technique incorporating ANN.
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Affiliation(s)
- P C Wu
- Department of Pharmaceutics, Hoshi University, Ebara 2-4-41, Shinagawa, Tokyo 142-8501, Japan
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