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Kawashima M, Oliver J, Watanabe T, Huang N, Konoeda C, Oishi H, Hirayama S, Hwang D, Keshavjee S, Juvet S, Martinu T. Surgeon- and Experience-Dependent Pathological Variations in Minor-Mismatched Mouse Lung Transplantation. J Heart Lung Transplant 2020. [DOI: 10.1016/j.healun.2020.01.021] [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: 10/24/2022] Open
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Yokokawa K, Furusaka M, Matsuura T, Hirayama S, Umegaki K. A new SOBP-formation method by superposing specially shaped Bragg curves formed by a mini-ridge filter for spot scanning in proton beam therapy. Phys Med 2019; 67:70-76. [DOI: 10.1016/j.ejmp.2019.10.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2018] [Revised: 08/30/2019] [Accepted: 10/21/2019] [Indexed: 12/11/2022] Open
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Hirayama S, Fukui M, Hattori A, Takamochi K, Oh S, Suzuki K. P3.16-25 Impact of Diabetes Mellitus on Survival Outcome in Patients with Pathological Stage IA Non-Small Cell Lung Cancer. J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.1932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Okumatsu K, Tsujimoto T, Wakaba K, Seki A, Kotake R, Yamauchi T, Hirayama S, Kobayashi H, Yamauchi H, Tanaka K. Effects of a combined exercise plus diet program on cardiorespiratory fitness of breast cancer patients. Breast Cancer 2018; 26:65-71. [PMID: 29992486 PMCID: PMC6315012 DOI: 10.1007/s12282-018-0889-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 07/01/2018] [Indexed: 01/16/2023]
Abstract
Background Decreases in cardiorespiratory fitness among breast cancer patients have often been reported in previous studies, affecting patients’ health and survival. Peak oxygen uptake (\documentclass[12pt]{minimal}
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\begin{document}$${{\dot{V}\text{O}}}_{{{\text{2peak}}}}$$\end{document}V˙O2peak) is the gold standard for assessing cardiorespiratory fitness and is inversely correlated with cardiovascular disease among women with breast cancer. Some previous studies have reported that aerobic exercise and proper diet positively influence \documentclass[12pt]{minimal}
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\begin{document}$${{\dot{V}\text{O}}}_{{{\text{2peak}}}}$$\end{document}V˙O2peak. However, almost all studies have been conducted in the Western countries, and few studies are investigating on Asian women who have lower BMI compared with Western ones. Purpose Investigating the effects of a combined exercise and diet program among Japanese cancer patients undergoing therapy on \documentclass[12pt]{minimal}
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\begin{document}$${{\dot{V}\text{O}}}_{{{\text{2peak}}}}$$\end{document}V˙O2peak. Methods Thirty-two Japanese women with breast cancer undergoing endocrine therapy (age; 50 ± 6 years, body weight; 59 ± 10 kg) were voluntarily assigned to either intervention group (n = 21) or control group (n = 11). The intervention group completed a 12-week combined exercise plus diet program, consisting of weekly aerobic exercise and maintaining a nutritionally well-balanced 1200 kcal/day diet. The control group was instructed to continue with their usual activities. Anthropometric indices and \documentclass[12pt]{minimal}
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\begin{document}$${{\dot{V}\text{O}}}_{{{\text{2peak}}}}$$\end{document}V˙O2peak were measured at baseline and after the 12-week program. Results All 21 women completed the 12-week program. The \documentclass[12pt]{minimal}
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\begin{document}$${{\dot{V}\text{O}}}_{{{\text{2peak}}}}$$\end{document}V˙O2peak significantly increased from 26.7 to 30.4 mL/kg/min (1.57–1.62 L/min) in the intervention group, while it remained unchanged (26.9–26.9 mL/kg/min) in the control group. Mean reduction of body mass index was − 2.1 in the intervention group (P < .001) and + 0.1 in the control group. Conclusions Our combined exercise plus diet program may contribute to improvement in cardiorespiratory fitness and body weight compared with control group.
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Affiliation(s)
- K Okumatsu
- Graduate School of Comprehensive Human Sciences, Faculty of Health and Sports Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan.
| | - T Tsujimoto
- Faculty of Human Sciences, Shimane University, 1060 Nishikawatsucho, Matsue, Shimane, 690-8504, Japan
| | - K Wakaba
- Graduate School of Comprehensive Human Sciences, Faculty of Health and Sports Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
| | - A Seki
- Department of Breast Surgical Oncology, St. Luke's International Hospital, 9-1 Akashicho, Chou-ku, Tokyo, 104-8560, Japan
| | - R Kotake
- Department of Breast Surgical Oncology, St. Luke's International Hospital, 9-1 Akashicho, Chou-ku, Tokyo, 104-8560, Japan
| | - T Yamauchi
- Division of Medical Oncology, Department of Internal Medicine, St. Luke's International Hospital, 9-1 Akashicho, Chou-ku, Tokyo, 104-8560, Japan
| | - S Hirayama
- Department of Management and Planning, Central Sports Co., Ltd, 1-21-2 Shinkawa, Chuo-ku, Tokyo, 104-8255, Japan
| | - H Kobayashi
- Department of General Medicine, Mito Medical Center, Tsukuba University Hospital, 3-2-7 Miyamachi, Mito, Ibaraki, 310-0015, Japan
| | - H Yamauchi
- Department of Breast Surgical Oncology, St. Luke's International Hospital, 9-1 Akashicho, Chou-ku, Tokyo, 104-8560, Japan
| | - K Tanaka
- Faculty of Health and Sports Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8574, Japan
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Yoshimasu Y, Ikeda T, Sakai N, Yagi A, Hirayama S, Morinaga Y, Furukawa S, Nakao R. Rapid Bactericidal Action of Propolis against Porphyromonas gingivalis. J Dent Res 2018; 97:928-936. [PMID: 29494308 DOI: 10.1177/0022034518758034] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Propolis, a resinous substance produced by bees, is used as a folk medicine for treatment of periodontal diseases. However, its mode of the action and the compounds responsible for its activities remain obscure. In the present study, we comprehensively investigated the antibacterial activities of ethanol-extracted propolis (EEP) and EEP-derived compounds toward Porphyromonas gingivalis, a keystone pathogen for periodontal diseases. Broth microdilution and agar dilution assays were used to determine the minimum inhibitory concentrations of EEP against a range of oral bacterial species, of which P. gingivalis showed a higher level of sensitivity than oral commensals such as streptococci. Its antibacterial activity toward P. gingivalis was maintained even after extensive heat treatment, demonstrating a high level of thermostability. EEP also induced death of P. gingivalis cells by increasing membrane permeability within 30 min. Spatiotemporal analysis based on high-speed atomic force microscopy revealed that EEP immediately triggered development of aberrant membrane blebs, followed by bleb fusion events on the bacterial surface. Furthermore, we isolated artepillin C, baccharin, and ursolic acid from EEP as antibacterial compounds against P. gingivalis. Of those, artepillin C and baccharin showed bacteriostatic activities with membrane blebbing, while ursolic acid showed bactericidal activity with membrane rupture. In particular, ursolic acid demonstrated a greater ability to affect bacterial membrane potential with increased membrane permeability, probably because of its highly lipophilic nature as compared with other compounds. Taken together, these findings provide mechanistic insight into the antibacterial activities of EEP and its exquisite membrane-targeting antibacterial compounds and imply the applicability of narrow-spectrum therapeutics with EEP for treatment of periodontitis. In addition, the advanced technology utilized in the present study to visualize the nanometer-scale dynamics of microorganisms will contribute to expanding our understanding of the activities of antimicrobials and the mechanism of drug resistance in bacteria.
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Affiliation(s)
- Y Yoshimasu
- 1 Department of Bacteriology I, National Institute of Infectious Diseases, Tokyo, Japan.,2 Department of Food Bioscience and Biotechnology, College of Bioresource Science, Nihon University, Kanagawa, Japan
| | - T Ikeda
- 3 Department of Pharmaceutical Sciences, Sojo University, Kumamoto, Japan
| | - N Sakai
- 4 Division of Medical Elemental Technology Development, Department of Micro System Technology, Olympus Corporation, Tokyo, Japan
| | - A Yagi
- 4 Division of Medical Elemental Technology Development, Department of Micro System Technology, Olympus Corporation, Tokyo, Japan
| | - S Hirayama
- 1 Department of Bacteriology I, National Institute of Infectious Diseases, Tokyo, Japan.,5 Japan Agency for Medical Research and Development (AMED), Tokyo, Japan
| | - Y Morinaga
- 2 Department of Food Bioscience and Biotechnology, College of Bioresource Science, Nihon University, Kanagawa, Japan
| | - S Furukawa
- 2 Department of Food Bioscience and Biotechnology, College of Bioresource Science, Nihon University, Kanagawa, Japan.,Deceased
| | - R Nakao
- 1 Department of Bacteriology I, National Institute of Infectious Diseases, Tokyo, Japan
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Suzuki K, Hirayama S, Matsunaga T, Hattori A, Fukui M, Takamochi K, Oh S. P-188PATTERNS OF N1 RECURRENCE IN PATIENTS WHO UNDERWENT PLASTIC PROCEDURE FOR LUNG CANCER: BRONCHIAL SLEEVE VERSUS DOUBLE SLEEVE VERSUS PULMONARY ARTERIOPLASTY. Interact Cardiovasc Thorac Surg 2017. [DOI: 10.1093/icvts/ivx280.188] [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: 11/13/2022] Open
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Suzuki K, Hirayama S, Maeyashiki T, Matsunaga T, Takamochi K, Oh S. V-014EXTENDED TYPE B BRONCHO-VASCULAR SLEEVE RESECTION OF THE LEFT UPPER LOBE AND THE SUPERIOR SEGMENT OF THE LOWER LOBE FOR LUNG CANCER. Interact Cardiovasc Thorac Surg 2016. [DOI: 10.1093/icvts/ivw260.14] [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: 11/12/2022] Open
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8
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Hirayama S, Fujibuchi T. SU-F-T-376: The Efficiency of Calculating Photonuclear Reaction On High-Energy Photon Therapy by Monte Carlo Method. Med Phys 2016. [DOI: 10.1118/1.4956561] [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: 11/07/2022] Open
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9
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Hirayama S, Fujimoto R. SU-F-T-201: Acceleration of Dose Optimization Process Using Dual-Loop Optimization Technique for Spot Scanning Proton Therapy. Med Phys 2016. [DOI: 10.1118/1.4956338] [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: 11/07/2022] Open
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Sato M, Imashimizu K, Kuwata T, Yamanashi K, Misawa K, Kobayashi M, Ikeda M, Koike T, Kitamura A, Kosaka S, Nagayama K, Sekine Y, Hirayama S, Okabe R, Sakai H, Watanabe F, Date H. F-147SAFETY, REPRODUCIBILITY AND BENEFIT OF VIRTUAL-ASSISTED LUNG MAPPING IN THORACOSCOPIC SUBLOBAR LUNG RESECTION: A MULTI-CENTRE STUDY IN JAPAN. Interact Cardiovasc Thorac Surg 2015. [DOI: 10.1093/icvts/ivv204.147] [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: 11/12/2022] Open
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11
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Oishi H, Martinu T, Sato M, Guan Z, Saito T, Sakamoto J, Hirayama S, Matsuda Y, Cypel M, Hwang D, Liu M, Keshavjee S. A Novel Ex Vivo Intrabronchial Delivery of Ientivirus IL-10 Gene Therapy Attenuates Both Acute Allograft Rejection and Bronchiolitis Obliterans After Murine Orthotopic Lung Transplantation. J Heart Lung Transplant 2015. [DOI: 10.1016/j.healun.2015.01.131] [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: 11/25/2022] Open
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Hirayama S, Takayanagi T, Fujii Y, Fujimoto R, Fujitaka S, Umezawa M, Nagamine Y, Hosaka M, Yasui K, Toshito T. TH-C-BRD-04: Beam Modeling and Validation with Triple and Double Gaussian Dose Kernel for Spot Scanning Proton Beams. Med Phys 2014. [DOI: 10.1118/1.4889602] [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: 11/07/2022] Open
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Hirayama S, Kawagishi K, Yokouchi K, Fukushima N, Karasawa M, Moriizumi T. Regenerative Capacity of Bulbar Projection Neurons During Development: A Quantitative Neuronal Analysis With Functional Correlation. Chem Senses 2013; 39:47-56. [DOI: 10.1093/chemse/bjt053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ohashi Y, Ejiri J, Hirayama S, Kato H, Yamawaki K, Hyogo K, Kashiwagi D, Nakayama K, Emoto N, Awano K. Natriuretic peptide/cyclic guanosine monophosphate pathway exerts compensatory roles against endothelin system in the pulmonary circulation of left heart disease. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht307.p620] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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15
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Hirayama S, Sato M, Loisel-Meyer S, Matsuda Y, Oishi H, Guan Z, Saito T, Yeung J, Cypel M, Hwang DM, Medin JA, Liu M, Keshavjee S. Lentivirus IL-10 gene therapy down-regulates IL-17 and attenuates mouse orthotopic lung allograft rejection. Am J Transplant 2013; 13:1586-93. [PMID: 23601206 DOI: 10.1111/ajt.12230] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2012] [Revised: 02/14/2013] [Accepted: 02/14/2013] [Indexed: 01/25/2023]
Abstract
The purpose of the study was to examine the effect of lentivirus-mediated IL-10 gene therapy to target lung allograft rejection in a mouse orthotopic left lung transplantation model. IL-10 may regulate posttransplant immunity mediated by IL-17. Lentivirus-mediated trans-airway luciferase gene transfer to the donor lung resulted in persistent luciferase activity up to 6 months posttransplant in the isograft (B6 to B6); luciferase activity decreased in minor-mismatched allograft lungs (B10 to B6) in association with moderate rejection. Fully MHC-mismatched allograft transplantation (BALB/c to B6) resulted in severe rejection and complete loss of luciferase activity. In minor-mismatched allografts, IL-10-encoding lentivirus gene therapy reduced the acute rejection score compared with the lentivirus-luciferase control at posttransplant day 28 (3.0 ± 0.6 vs. 2.0 ± 0.6 (mean ± SD); p = 0.025; n = 6/group). IL-10 gene therapy also significantly reduced gene expression of IL-17, IL-23, and retinoic acid-related orphan receptor (ROR)-γt without affecting levels of IL-12 and interferon-γ (IFN-γ). Cells expressing IL-17 were dramatically reduced in the allograft lung. In conclusion, lentivirus-mediated IL-10 gene therapy significantly reduced expression of IL-17 and other associated genes in the transplanted allograft lung and attenuated posttransplant immune responses after orthotopic lung transplantation.
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Affiliation(s)
- S Hirayama
- Latner Thoracic Surgery Research Laboratories, University Health Network, University of Toronto, Toronto, Ontario, Canada
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Okada M, Yamane M, Iga N, Nishikawa H, Yamamoto S, Otani S, Waki N, Hirayama S, Miyoshi K, Sugimoto S, Toyooka S, Oto T, Matsukawa A, Miyoshi S. MAPK/ERK Pathway Activation Leads to Severe Ischemia-Reperfusion-Induced Lung Injury. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.309] [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: 11/30/2022] Open
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17
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Hirayama S, Terasawa K, Rabeler R, Hirayama T, Inoue T, Tatsumi Y, Purpura M, Jäger R. The effect of phosphatidylserine administration on memory and symptoms of attention-deficit hyperactivity disorder: a randomised, double-blind, placebo-controlled clinical trial. J Hum Nutr Diet 2013; 27 Suppl 2:284-91. [PMID: 23495677 DOI: 10.1111/jhn.12090] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Attention-deficit hyperactivity disorder (ADHD) is the most commonly diagnosed behavioural disorder of childhood, affecting 3-5% of school-age children. The present study investigated whether the supplementation of soy-derived phosphatidylserine (PS), a naturally occurring phospholipid, improves ADHD symptoms in children. METHODS Thirty six children, aged 4-14 years, who had not previously received any drug treatment related to ADHD, received placebo (n = 17) or 200 mg day(-1) PS (n = 19) for 2 months in a randomised, double-blind manner. Main outcome measures included: (i) ADHD symptoms based on DSM-IV-TR; (ii) short-term auditory memory and working memory using the Digit Span Test of the Wechsler Intelligence Scale for Children; and (iii) mental performance to visual stimuli (GO/NO GO task). RESULTS PS supplementation resulted in significant improvements in: (i) ADHD (P < 0.01), AD (P < 0.01) and HD (P < 0.01); (ii) short-term auditory memory (P < 0.05); and (iii) inattention (differentiation and reverse differentiation, P < 0.05) and inattention and impulsivity (P < 0.05). No significant differences were observed in other measurements and in the placebo group. PS was well-tolerated and showed no adverse effects. CONCLUSIONS PS significantly improved ADHD symptoms and short-term auditory memory in children. PS supplementation might be a safe and natural nutritional strategy for improving mental performance in young children suffering from ADHD.
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Affiliation(s)
- S Hirayama
- Department of Early Childhood Education and Care, Kurashiki City College, Okayama, Japan; Daigokyou, Kyoto, Japan
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Pomp S, Bevilacqua R, Hayashi M, Hirayama S, Lecolley FR, Marie N, Naitou Y, Tippawan U, Watanabe Y, Andersson P, Blomgren J, Gustavsson C, Hjalmarsson A, Prokofiev A, Simutkin V, Tengborn E, Tesinsky M, Österlund M, Kolozhvari A. A Medley with over ten years of (mostly) light-ion production measurements at The Svedberg Laboratory. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100807013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Bevilacqua R, Pomp S, Simutkin V, Tippawan U, Andersson P, Blomgren J, Österlund M, Hayashi M, Hirayama S, Naito Y, Watanabe Y, Tesinsky M, LeColley FR, Marie N, Hjalmarsson A, Prokofiev A, Kolozhvari A. Neutron induced light-ion production from Iron and Bismuth at 175 MeV. EPJ Web of Conferences 2010. [DOI: 10.1051/epjconf/20100205005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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20
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Wagnetz D, Sato M, Yeung J, Hirayama S, Waddell T, Liu M, Keshavjee S. 324: De Novo Formation of Lymphoid Tissue in the Lung Evolves Post Transplant Obliterative Airway Disease. J Heart Lung Transplant 2010. [DOI: 10.1016/j.healun.2009.11.337] [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] Open
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Cypel M, Rubacha M, Yeung J, Hirayama S, Torbicki K, Madonik M, Fischer S, Hwang D, Pierre A, Waddell TK, de Perrot M, Liu M, Keshavjee S. Normothermic ex vivo perfusion prevents lung injury compared to extended cold preservation for transplantation. Am J Transplant 2009; 9:2262-9. [PMID: 19663886 DOI: 10.1111/j.1600-6143.2009.02775.x] [Citation(s) in RCA: 195] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Treatment of injured donor lungs ex vivo to accelerate organ recovery and ameliorate reperfusion injury could have a major impact in lung transplantation. We have recently demonstrated a feasible technique for prolonged (12 h) normothermic ex vivo lung perfusion (EVLP). This study was performed to examine the impact of prolonged EVLP on ischemic injury. Pig donor lungs were cold preserved in Perfadex for 12 h and subsequently divided into two groups: cold static preservation (CSP) or EVLP at 37 degrees C with Steen solution for a further 12 h (total 24 h preservation). Lungs were then transplanted and reperfused for 4 h. EVLP preservation resulted in significantly better lung oxygenation (PaO(2) 531 +/- 43 vs. 244 +/- 49 mmHg, p < 0.01) and lower edema formation rates after transplantation. Alveolar epithelial cell tight junction integrity, evaluated by zona occludens-1 protein staining, was disrupted in the cell membranes after prolonged CSP but not after EVLP. The maintenance of integrity of barrier function during EVLP translates into significant attenuation of reperfusion injury and improved graft performance after transplantation. Integrity of functional metabolic pathways during normothermic perfusion was confirmed by effective gene transfer and GFP protein synthesis by lung alveolar cells. In conclusion, EVLP prevents ongoing injury associated with prolonged ischemia and accelerates lung recovery.
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Affiliation(s)
- M Cypel
- Toronto Lung Transplant Program, Division of Thoracic Surgery, Latner Thoracic Laboratories, University of Toronto, Toronto, ON, Canada
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22
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Sato M, Hirayama S, Lara-Guerra H, Anraku M, Waddell TK, Liu M, Keshavjee S. MMP-dependent migration of extrapulmonary myofibroblast progenitors contributing to posttransplant airway fibrosis in the lung. Am J Transplant 2009; 9:1027-36. [PMID: 19422332 DOI: 10.1111/j.1600-6143.2009.02605.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Myofibroblasts play a central role in fibroproliferative airway remodeling in obliterative bronchiolitis (OB) after lung transplantation. The purpose of the study is to elucidate the mechanisms whereby matrix metalloproteinases (MMPs) contribute to myofibroblast-mediated allograft airway fibrosis. In an intrapulmonary tracheal transplant model of OB, broad-spectrum MMP inhibitors, SC080 and MMI270 reduced the number of myofibroblasts at day 28 without changing differentiation, proliferation or apoptosis of myofibroblasts or fibroblasts. Next, myofibroblasts in allograft airway fibrosis were demonstrated to be almost exclusively of extrapulmonary origin by analyzing RT1A(n) positive myofibroblasts in an animal model combining orthotopic lung transplantation (from Lewis (RT1A(l)) to F1 (Brown-Norway (RT1A(n)) x Lewis)) and intrapulmonary tracheal transplantation (from a Wister-Furth rat (RT1A(u)) into the transplanted Lewis-derived lung). Using peripheral blood mononuclear cells (PBMCs) that can differentiate into alpha-SMA positive myofibroblasts in vitro, we demonstrated their contribution to the myofibroblast population of allograft airway fibrosis in vivo using a fluorescence-labeling cell tracking system. Moreover, PBMC-derived fibroblast-like cells expressed high levels of MMP-9 and MMP-12 and their migration was inhibited by MMP inhibitors in a wound healing assay. In conclusion, MMP-dependent migration of PBMC-derived myofibroblast precursors is an important contributing mechanism to the development of allograft airway fibrosis.
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Affiliation(s)
- M Sato
- Latner Thoracic Research Laboratories, Toronto General Research Institute, University Health Network, University of Toronto, Toronto, ON, Canada
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Wagnetz D, Sato M, Hirayama S, Yeung J, Liu M, Waddell T, Keshavjee S. 522: The Mouse Intrapulmonary Tracheal Transplant Model of Obliterative Bronchiolitis: A Novel Tool To Investigate Lymphoid Neogenesis in the Lung after Transplantation. J Heart Lung Transplant 2009. [DOI: 10.1016/j.healun.2008.11.529] [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: 10/21/2022] Open
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Kanazawa T, Takashima Y, Hirayama S, Okada H. Effects of menstrual cycle on gene transfection through mouse vagina for DNA vaccine. Int J Pharm 2008; 360:164-70. [PMID: 18573624 DOI: 10.1016/j.ijpharm.2008.04.038] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2007] [Revised: 04/08/2008] [Accepted: 04/21/2008] [Indexed: 11/17/2022]
Abstract
Human immunodeficiency virus (HIV) infections mainly occur through the vaginal and rectal mucosal membranes. In the present study, to develop a DNA vaginal vaccine against viral and bacterial infections, the effects of the menstrual cycle on DNA transfection through the vaginal mucosa in female mice and transfection enhancement by electroporation, a chelating agent, cell-penetrating peptides (CPP) and nuclear localizing signals (NLS) were investigated. The transfection efficiencies of a marker plasmid DNA (pDNA), pCMV-Luc, on the vaginal mucosal membrane in mice at the stages of metestrus and diestrus were significantly higher than those at the stages of proestrus and estrus. The gene expression was markedly enhanced by electroporation and by pretreatment with the chelating agent. The highest level of expression was obtained by 2h pretreatment with 5% citric acid solution combined with electroporation with 15 pulses at 250 V/cm for 5 milliseconds (ms). Furthermore, a synergistic promoting effect on pDNA transfection was obtained by co-administration of CPP, the Tat peptide analog, and NLS, the NF-kappaB analog. These results indicate that effective DNA vaccination administered through the vaginal tract is possible by selecting the menstrual stage and overcoming the mucosal barrier using a combination of methods that promotes uptake.
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Affiliation(s)
- T Kanazawa
- Laboratories of Pharmaceutics and Drug Delivery, Department of Pharmaceutical Science, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo 192-0392, Japan
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25
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Sato M, Hirayama S, Wagnetz D, Liu M, Waddell T, Keshavjee S. 429: The Role of Lymphoid Neogenesis in the Chronic Local Alloimmune Response in the Lung. J Heart Lung Transplant 2008. [DOI: 10.1016/j.healun.2007.11.441] [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] Open
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26
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Cypel M, Rubacha M, Hirayama S, Yeung J, Torbicki K, Fischer S, Anraku M, Sato M, Pierre A, Liu M, Waddell T, de Perrot M, Keshavjee S. 331: Ex-Vivo Repair and Regeneration of Damaged Human Donor Lungs. J Heart Lung Transplant 2008. [DOI: 10.1016/j.healun.2007.11.341] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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27
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Sato M, Duchesneau P, Andrade C, Hirayama S, Liu M, Waddell T, Keshavjee S. 347: The pulmonary milieu facilitates allograft airway rejection: A possible role for bronchus associated lymphatic tissue (BALT). J Heart Lung Transplant 2007. [DOI: 10.1016/j.healun.2006.11.367] [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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28
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Sato M, Anraku M, Cypel M, Hirayama S, Waddell T, Liu M, Keshavjee S. 548: Regression of established post-transplant allograft airway obliteration by targeting interaction of fibrosis and immune system. J Heart Lung Transplant 2007. [DOI: 10.1016/j.healun.2006.11.572] [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: 10/23/2022] Open
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29
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Cypel M, Rubacha M, Sato M, Hirayama S, Fischer S, McRae K, Liu M, Waddell T, dePerrot M, Keshavjee S. 423: Adenoviral mediated interleukin 10(AdhIL-10) gene therapy in normothermic ex-vivo lung perfusion. J Heart Lung Transplant 2007. [DOI: 10.1016/j.healun.2006.11.445] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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30
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Tanooka M, Takiuchi H, Sakai T, Nasada T, Hirayama S, Shima H, Pande AR, Nakao N. [New CT program simulating kidney displacement during retroperitoneal laparoscopic nephrectomy]. Nihon Hoshasen Gijutsu Gakkai Zasshi 2006; 62:713-5. [PMID: 16767829] [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: 05/10/2023]
Abstract
A total of 12 patients with malignant localized renal or ureteral neoplasms underwent multi-slice computed tomography. Imaging data were sent to the dedicated workstation to create volume rendering and virtual laparoscopic images of the kidney which was displaced ventrally with retroperitoneal balloon. These findings were compared with video images obtained during retroperitoneal laparoscopic nephrectomy. The kidney displacement simulator depicted all renal arteries (100% sensitivity) and 13 of 14 renal veins (93% sensitivity). Hilar anatomy, including the tumor, major vessels and their relationships were visualized as in the actual laparoscopic views. The desired portions of major vessels as well as the left adrenal and gonadal veins visualized with this system completely corresponded with the actual laparoscopic images during surgery. The kidney displacement simulator is useful to foresee desired portions of major vessels and branched small vessels such as the adrenal or gonadal veins in advance of surgery. It is thus able to guide surgeons and reduce operative risks and possible complications.
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Affiliation(s)
- M Tanooka
- Department of Clinical Radiology, The Hospital of Hyogo College of Medicine
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31
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Yamada Y, Hirayama S. M^|^ouml;ssbauer Investigation into the Reactions of Laser-evaporated Iron with Solid Oxygen at Low Temperatures. ACTA ACUST UNITED AC 2006. [DOI: 10.14494/jnrs2000.7.2_17] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Hamazaki T, Hirayama S. The effect of docosahexaenoic acid-containing food administration on symptoms of attention-deficit/hyperactivity disorder-a placebo-controlled double-blind study. Eur J Clin Nutr 2005; 58:838. [PMID: 15116088 DOI: 10.1038/sj.ejcn.1601888] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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33
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Hirayama S, Hamazaki T, Terasawa K. Effect of docosahexaenoic acid-containing food administration on symptoms of attention-deficit/hyperactivity disorder - a placebo-controlled double-blind study. Eur J Clin Nutr 2004; 58:467-73. [PMID: 14985685 DOI: 10.1038/sj.ejcn.1601830] [Citation(s) in RCA: 173] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVES To investigate whether docosahexaenoic acid (DHA) supplementation was able to ameliorate attention-deficit/hyperactivity disorder(AD/HD) symptoms in AD/HD children. DESIGN AND SUBJECTS A placebo-controlled double-blind study with 40 AD/HD (including eight AD/HD-suspected) children of 6-12 y of age who were mostly without medication. Subjects of a DHA group (n=20) took active foods containing fish oil (fermented soybean milk, bread rolls and steamed bread; 3.6 g DHA/week from these foods) for 2 months, whereas those of a control group (n=20) took indistinguishable control foods without fish oil. The following items were measured at the start and end of the study: (1) attention deficit, hyperactivity and impulsivity (AD/HD-related symptoms according to DSM-IV criteria); (2) aggression assessed by both parents and teachers; (3) visual perception (finding symbols out of a table); (4) visual and auditory short-term memory; (5) development of visual-motor integration; (6) continuous performance; (7) impatience. RESULTS Changes in tests 1, 2, 3, 5 and 7 over time did not significantly differ between the two groups. However, visual short-term memory and errors of commission (continuous performance) significantly improved in the control group compared with the changes over time in the DHA group (P=0.02 and 0.001, respectively). Recalculation without AD/HD-suspected subjects (n=4 each group) showed similar P-values with regard to both measures. CONCLUSION DHA supplementation did not improve AD/HD-related symptoms. Treatment of ADHD with fatty acids deserves further investigation, but careful attention should be paid as to which fatty acid(s) is used.
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Affiliation(s)
- S Hirayama
- Department of Early Childhood Education and Care, Kurashiki City College, Okayama, Japan
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Shiraishi T, Hirayama S, Hiratsuka M, Iwasaki A, Makimoto Y, Iwasaki H, Kawahara K, Shirakusa T. Mediastinal Solitary Fibrous Tumor: Report of a Case with Direct Invasion to the Trachea. Thorac Cardiovasc Surg 2004; 52:110-2. [PMID: 15103584 DOI: 10.1055/s-2004-817808] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The solitary fibrous tumors in the pleura are a rare entity that is usually adhesive and sometimes invasive. Because of its benign feature, complete surgical resection is generally considered. We describe a very rare case of mediastinal solitary fibrous tumor arised or invaded into the tracheal wall, which was surgically resected with combined cylindrical resection of the trachea.
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Affiliation(s)
- T Shiraishi
- Department of Surgery II, Fukuoka University School of Medicine, Fukuoka-City, Fukuoka, Japan.
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35
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Nakamura Y, Miida T, Makiyama Y, Mezaki T, Tanaka T, Saigawa T, Ozawa T, Watanabe R, Tsuchida K, Minagawa S, Hanyu O, Hirayama S, Aizawa Y. 2P-0538 Can we screen postprandial hyperlipidemia with a single blood sample obtained after lunch? ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90677-5] [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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36
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Hanyu O, Yamatani K, Ikarashi T, Soda S, Maruyama S, Kamimura T, Kaneko S, Hirayama S, Suzuki K, Nakagawa O, Nawa H, Aizawa Y. Brain-derived neurotrophic factor modulates glucagon secretion from pancreatic alpha cells: its contribution to glucose metabolism. Diabetes Obes Metab 2003; 5:27-37. [PMID: 12542722 DOI: 10.1046/j.1463-1326.2003.00238.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
AIM Brain-derived neurotrophic factor (BDNF) reduces plasma glucose levels in obese db/db diabetic mice and is speculated to produce its effects via the hypothalamus, the regulatory centre of satiety and the autonomic nervous system. The potential effect of BDNF directly on peripheral endocrine organs, however, remains to be clarified. Here we report the effects of BDNF on hormonal secretion from pancreatic islets of Langerhans using their isolated culture. METHODS AND RESULTS In an immunohistochemical study, mouse pancreatic alpha cells were stained specifically with the anti-TrkB (a specific receptor for BDNF) antibody. After 7 days culture of isolated islets of the normal mouse pancreas, 10 ng/ml BDNF decreased the secretion of glucagon per 6 h significantly less than that of the control (p = 0.016). In contrast, there were no significant changes in insulin secretion or glucagon and insulin contents in the islets cultured under the same conditions. In vivo administration of BDNF (10 mg/kg/day) to normal mice for 7 days significantly decreased their food consumption (p < 0.05). The fasting plasma glucose levels were decreased on day 7 compared with day 1 more significantly in BDNF-treated mice (p = 0.043) than in pair-fed control mice (p = 0.14). In newborn BDNF-knockout mice, fasting plasma glucose levels increased in the order of homozygote, heterozygote and wild type (p = 0.033). No apparent immunohistochemical abnormality was observed for pancreatic glucagon in the BDNF-knockout mice. CONCLUSION These data suggest that BDNF affects glucose metabolism not only with its anorectic effect but also with modulated glucagon secretion from pancreatic alpha cells.
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Affiliation(s)
- O Hanyu
- Division of Endocrinology and Metabolism, Department of Homeostatic Regulation, Niigata University Graduate School of Medical and Dental Sciences, Niigata City, Japan.
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37
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Meizi J, Bujo H, Zhu Y, Takahashi K, Yamazaki H, Kanaki T, Hirayama S, Shibasaki M, Schneider W, Saito Y. 3P-0684 Novel mechanism of LR11-induced migration of vascular smooth muscle cells. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90903-2] [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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38
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Milda T, Obayashi K, Seino U, Nakamura Y, Hanyu O, Hirayama S, Miyazaki O, Nakamura Y, Fudamachi I, Okada M. 1P-0215 LCAT-dependent conversion rate is a determinant of plasma preβ-1-HDL concentration in normolipidemic Japanese. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90286-8] [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]
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39
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Scully AD, Hirayama S, Hachisu D, Tominaga T. Analysis of the transient effect for a bimolecular fluorescence quenching reaction between ions in aqueous solution. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100197a036] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [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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40
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Hirayama S, Kohrogi H, Ueda A, Kiyofuji C, Hirata N, Fujii K, Goto E, Fujita K, Tsumori K, Hirosako S, Noguchi D, Kawano O, Ando M. [Prevalence of asthma in adults in Menda town rural-mountain area in Japan]. Arerugi 2001; 50:1163-70. [PMID: 11831000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Several reports have suggested that the prevalence of asthma in adults is currently increasing. However, recent prevalence of asthma has not reported in Japan, especially in rural-mountain areas. To investigate the prevalence of asthma in adults in Japan, we conducted clinical epidemiological research on 5066 inhabitants of Menda town, in a rural-mountain area of Japan. The study population comprised 98.7% of adults in the town, including senior high school students whose age were more than 15 years old. The prevalence of asthma among adults was 3.6%. The ratio of prevalence in males to prevalence in females was 1.44. Peaks prevalences were observed in the age ranges of 15-19 and > 70 years old in males, and 15-19, 40-49 and > 70 years old in females.
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Affiliation(s)
- S Hirayama
- First Department of Internal Medicine, Kumamoto University School of Medicine, Kumamoto, Japan
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41
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Taira K, Bujo H, Hirayama S, Yamazaki H, Kanaki T, Takahashi K, Ishii I, Miida T, Schneider WJ, Saito Y. LR11, a mosaic LDL receptor family member, mediates the uptake of ApoE-rich lipoproteins in vitro. Arterioscler Thromb Vasc Biol 2001; 21:1501-6. [PMID: 11557679 DOI: 10.1161/hq0901.094500] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Since the molecular identification of the low density lipoprotein receptor (LDLR), an ever increasing number of related proteins have been discovered. These receptors belonging to the LDLR family are thought to play key roles in lipoprotein metabolism in a variety of tissues, including the arterial wall. We have discovered that the expression of a 250-kDa mosaic LDLR-related protein, which we termed LR11 for the presence of 11 LDLR ligand-binding repeats, is markedly induced in smooth muscle cells in the hyperplastic intima of animal models used for the study of atherosclerosis. Here, we demonstrate that the human LR11, when overexpressed in hamster cells, binds and internalizes 39-kDa receptor-associated protein (RAP), an in vitro ligand for all receptors belonging to the LDLR family. Furthermore, LR11 binds the apolipoprotein E (apoE)-rich lipoproteins, beta-very low density lipoproteins (VLDLs), with a high affinity similar to that of other members, such as the LDLR and VLDL receptor. RAP and beta-VLDL compete with each other; however, other serum lipoproteins are not able to inhibit their binding. LR11 shows specific binding of apoE-enriched HDL prepared from human cerebrospinal fluid as well as of beta-VLDL, suggesting that the apoE content of lipoproteins is most likely important for mediating the high-affinity binding to the receptor. LR11-overexpressing cells are able to internalize and degrade the bound beta-VLDL; these cells also show increased accumulation of cholesteryl esters when incubated with beta-VLDL. Incubation for 48 hours with beta-VLDL of LR11-overexpressing cells, but not of control cells, promotes the appearance of numerous intracellular lipid droplets. Taken together, LR11, a mosaic LDLR family member whose expression in smooth muscle cells is markedly induced in atheroma, has all the properties of a receptor for the endocytosis of lipoproteins, particularly for the incorporation of apoE-rich lipoproteins.
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Affiliation(s)
- K Taira
- Department of Clinical Cell Biology, Graduate School of Medicine, Faculty of Pharmaceutical Sciences, Chiba University, Chiba, Japan
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42
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Yoshizawa F, Sekizawa H, Hirayama S, Hatakeyama A, Nagasawa T, Sugahara K. Time course of leucine-induced 4E-BP1 and S6K1 phosphorylation in the liver and skeletal muscle of rats. J Nutr Sci Vitaminol (Tokyo) 2001; 47:311-5. [PMID: 11767213 DOI: 10.3177/jnsv.47.311] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The purpose of the current study was to assess the involvement of the branched-chain amino acid leucine in the regulation of translation initiation in the liver and to compare the time course of leucine action on the translation initiation in the liver and skeletal muscle of rats. The phosphorylation of the eukaryotic initiation factor (eIF)4E-binding protein 1 (4E-BP1) frees eIF4E and stimulates protein synthesis by accelerating translation initiation. Phosphorylation of the 70-kDa ribosomal protein S6 kinase (S6K) is thought to be involved in regulating the synthesis of certain ribosomal proteins and other selected proteins with polypyrimidine clusters near the transcription start site. Food-deprived (18 h) male rats were orally administered 135 mg/100 g body weight L-leucine and sacrificed at 0, 1, 3, or 6 h after administration. The oral administration of leucine resulted in an enhanced phosphorylation of 4E-BP1 and S6K1 in both the liver and skeletal muscle. A time-dependent change in the phosphorylation state of 4E-BP1 and S6K1 was more acute in the skeletal muscle than in the liver and closely paralleled the changes in plasma leucine concentration. Our results indicate that the primary mediator in 4E-BP1 phosphorylation and S6K1 phosphorylation by the oral administration of leucine is an increase in the plasma concentration of leucine. Furthermore, our findings suggest differential sensitivity in the tissue response to oral administration of leucine.
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Affiliation(s)
- F Yoshizawa
- Department of Animal Science, Utsunomiya University, Tochigi, Japan
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43
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Kashiwabara K, Toyonaga M, Yamaguchi Y, Nakamura H, Hirayama S, Kurano R. Sarcoid reaction in primary tumor of bronchogenic large cell carcinoma accompanied with massive necrosis. Intern Med 2001; 40:127-30. [PMID: 11300145 DOI: 10.2169/internalmedicine.40.127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
A 49-year-old woman consulted our hospital for evaluation of a tumor with cavitation in the S6 segment of the right lung. She was given a diagnosis of pulmonary tuberculoma because percutaneous needle aspiration cytology revealed epithelioid cells with a background of necrosis. However, a diagnosis of large cell carcinoma with central necrosis (p-T2NOM0) was established by thoracoscopic lung biopsy six months later. Pathological findings of surgical resection specimens showed that epithelioid cell granulomas adjacent to the neoplasm had a sarcoid reaction and the necrosis was related to the rapidly growing tumor because there was no clinical evidence of systemic sarcoidosis and pulmonary mycobacterial or fungal infection. This is the first report in which sarcoid reactions were recognized in a primary large cell carcinoma.
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Affiliation(s)
- K Kashiwabara
- Respiratory Department, Taragi Municipal Hospital, Kumamoto
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44
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Hirayama S, Kobayashi J, Taira K, Hikita M, Bujo H, Morisaki N, Matsunaga A, Sasaki J, Saito Y. Marked elevation in serum apolipoprotein E in a case of heterozygous cholesteryl ester transfer protein deficiency. Clin Chim Acta 2000; 301:55-64. [PMID: 11020462 DOI: 10.1016/s0009-8981(00)00331-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The subject was a 57-year-old Japanese woman with a body mass index of 21.2 kgm(-2). Her serum total cholesterol (TC), triglycerides (TG) and HDL-cholesterol levels were 7.11 mmoll(-1), 0.53 mmoll(-1) and 2.05 mmoll(-1), respectively. She had a marked increase of serum apolipoprotein (Apo) E concentration of 25 mgdl(-1) with normal concentrations of serum Apo A-I, A-II, B, C-II and C-III. Polymerase chain reaction-restriction fragments length polymorphism analysis of the cholesteryl ester transfer protein (CETP) gene from this subject revealed the heterozygous nucleotide change causing a Asp442 to Gly substitution (D442G) in the CETP protein. For comparison, 11 unrelated female subjects with this mutation (age, 57+/-5.1 years; BMI, 22+/-1.5 kgm(-2); TC, 7.23+/-1.16 mmoll(-1); TG, 1.44+/-0.80 mmoll(-1); HDL-C, 2.47+/-0.53 mmoll(-1)) were found to have a serum Apo E concentration of 7+/-1.5 mgdl(-1), about a third of the patient's concentration. The lipoprotein profile of the proband's serum analyzed by disk polyacrylamide gel electrophoresis showed a trace amount of VLDL. A vitamin A fat-loading test showed little increase in serum triglycerides and retinyl palmitate levels compared with control subjects at 2, 4 and 6 h after fat loading. Ultracentrifugation analysis of her serum revealed no detectable Apo E in the VLDL fraction but showed a large amount of Apo E in the HDL fraction, in contrast to a normal control, who had Apo E in the VLDL fraction as well as in the HDL fraction. Sequence analysis of the Apo E gene from the subject showed no nucleotide changes in exon 3 and exon 4, which code the mature Apo E protein, indicating there is no structural abnormality in the Apo E protein. Direct sequence analysis of the LDL receptor gene also did not show any nucleotide change. Based on these findings, it was hypothesized that the marked increase of Apo E in the patient's serum was caused by a decreased transfer of Apo E from HDL particles to TG-rich lipoproteins or impaired uptake of Apo E-containing HDL by LDL receptor or remnant receptor, due presumably to a dysfunction of these receptors in the patient.
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Affiliation(s)
- S Hirayama
- Second Department of Internal Medicine, School of Medicine, Chiba University, Chiba, Japan
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45
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Abstract
The diametral tensile strength (DTS) and compressive strength (CS) of a calcium phosphate cement comprised of tetracalcium phosphate and dicalcium phosphate anhydrous were studied. Cement powder and water were mixed at a powder/liquid ratio of 4.0. The resulting cement pastes were placed in molds and a pressure ranging from 0-2.8 MPa was applied for various lengths of time (0.5-24 h). DTS and CS measurements were conducted on 24-h wet samples. The strength was found to be significantly (p<0.05) affected by the pressure but not by the time. Samples prepared under a pressure of 0.7 MPa had a mean DTS value of 10.8+/-1.0 MPa (n = 5), which is comparable to the values reported in the literature for the same cement prepared under similar conditions. In contrast, the mean CS value obtained in the present study, 66.1+/-5.0 MPa (n = 5), was significantly higher than the value (51+/-4.5 MPa) previously reported. The higher CS may be attributed to an improved mold design that may reduce sample damage during demolding, and to the use of a loading device that applied a constant pressure to the sample during setting. The average standard deviation of the mean for the 19 DTS sample groups (n = 5 in each group) was 1.1 MPa, corresponding to 9.6% of the mean DTS value. The average standard deviation of the 7 CS sample groups (n = 5 in each group) was 4.5 MPa, corresponding to 7.1% of the mean CS value. Published 2000 John Wiley & Sons, Inc.
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Affiliation(s)
- L C Chow
- American Dental Association Health Foundation, Paffenbarger Research Center, Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA
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46
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Hirayama S, Bujo H, Yamazaki H, Kanaki T, Takahashi K, Kobayashi J, Schneider WJ, Saito Y. Differential expression of LR11 during proliferation and differentiation of cultured neuroblastoma cells. Biochem Biophys Res Commun 2000; 275:365-73. [PMID: 10964672 DOI: 10.1006/bbrc.2000.3312] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An involvement of the low density lipoprotein receptor (LDLR) gene family in both intracellular signal pathways for neural organization and metabolic pathways for lipoprotein homeostasis is now well established. The discovery of LR11, a mosaic LDLR family member offers the opportunity to gain new insights into receptor multifunctionality. Here, we studied the proliferation-dependent expression of LR11 mRNA and protein using two cultured cell lines, IMR32 neuroblastoma and PC12 pheochromocytoma. Within 24 h, the LR11 protein rose 1.9-fold in proliferating IMR32 cells, and increased further to 5.3-fold at 72 h. This conformed with a transcript level increase of 4.7-fold at 72 h in the proliferating cells. On the other hand, under differentiation conditions, a 2.9-fold increase was observed within 24 h, but at 72 h thereafter the protein levels decreased to 60% of control. The transcript also increased to 1. 8-fold within 24 h, and then decreased to 1.1-fold at 72 h. In order to assess the transcriptional activities of the LR11 gene, we identified the 5'-flanking region of the murine LR11 gene. Transfection of IMR32 and PC12 cells with plasmids containing the whole or deleted fragments of 5'-flanking region showed that element(s) responsible for the above described different transcriptional activities are located in the upstream sequence between -861 and -396. Thus, the transcription of LR11 in these two cell systems is regulated differently during proliferation and differentiation, suggesting that the multifunctionality of LR11, as well as other LDLR family members, for rapid cell growth in malignant cells and neural outgrowth in cultured neurons, respectively. The possible involvement of LR11 in cellular proliferation and differentiation sheds new light on its functions in neurons, malignant, and vascular cells.
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Affiliation(s)
- S Hirayama
- Second Department of Internal Medicine, Chiba University School of Medicine, Chiba, 260, Japan
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47
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Taira K, Bujo H, Kanaki T, Hirayama S, Saito Y, Ishii I, Schneider W. Marked increased expression of LR11, a mosaic LDL receptor family member, in atherosclerotic lesions. Atherosclerosis 2000. [DOI: 10.1016/s0021-9150(00)81339-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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48
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Hikita M, Bujo H, Hirayama S, Takahashi K, Morisaki N, Saito Y. Differential regulation of leptin receptor expression by insulin and leptin in neuroblastoma cells. Biochem Biophys Res Commun 2000; 271:703-9. [PMID: 10814526 DOI: 10.1006/bbrc.2000.2692] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Leptin exerts its effects by interacting with specific membrane receptors (Ob-R). We studied the exact localization of long intracellular domain form (Ob-Rb) in human brain. In addition, we analyzed the regulatory features of Ob-Rb expression in two neuroblastoma cell lines. The Ob-Rb mRNAs were abundant in putamen, frontal lobe, medulla, cerebral cortex, cerebellum, thalamus, hippocampus, corpus callosum, caudate nucleus, and amygdala, indicating that Ob-Rb transcripts are expressed differently from that of other Ob-R isoforms. In SK-N-MC cells, the expression of Ob-Rb mRNA was induced by increasing doses of insulin, and the maximum amount of mRNA expression was 9.4-fold higher in the presence of insulin (100 nM for 24 h), compared to the absence of insulin. In IMR32 cells, the transcripts were increased 4.0-fold when cells were incubated with 1 nM of insulin for 48 h. In contrast, Ob-Rb expression in IMR32 cells decreased to 18% of control following a 24-h incubation period with 50 ng/mL of leptin, compared to incubation in the absence of leptin. These results indicate that expression of Ob-Rb is differentially regulated by inhibitory signals of energy balance in neuroblastoma cells. The identification of the novel regulatory mechanisms involving the Ob-Rb isoform by insulin and leptin now makes it possible to elucidate the underlying mechanisms involving increased food intake and uncontrolled energy balance associated with leptin resistance in obese individuals.
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Affiliation(s)
- M Hikita
- Second Department of Internal Medicine, Chiba University School of Medicine, 1-8-1 Inohana, Chuo-ku, Chiba, 260-0856, Japan
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49
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Fujita A, Miya T, Tanaka R, Hirayama S, Isaka H, Ono Y, Koshiishi Y, Goya T. [Levofloxacin concentrations in serum, sputum and lung tissue: evaluation of its efficacy according to breakpoint]. Jpn J Antibiot 1999; 52:661-6. [PMID: 10659442] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The levels of levofloxacin (LVFX) in the serum, sputum and lung tissue were measured by a high-performance liquid chromatography method, and the penetration ratio of LVFX into respiratory tissue was investigated. The subjects of this study were 23 patients under pulmonectomy or brochoscopy. LVFX at the dose of 200 mg was given orally and specimens were collected as follows; serum at 2, 3 and 5 hours after, sputum at 2 hours after, and lung tissue at 3 and 5 hours after the administration, respectively. The mean level of LVFX in lung tissue at 3 hours was 3.91 +/- 2.33 micrograms/g, and those in sputum and in serum at 2 hours were 0.71 +/- 0.63 and 2.08 +/- 1.01 micrograms/ml, respectively. A very strong correlation was demonstrated between the level of LVFX in lung tissue and that in serum (p < 0.0001), but correlation between those in sputum and in serum was not significant. The penetration ratio of LVFX into lung tissue was 217.2% and that into sputum was 4.05%. Based on the results of this study, the breakpoints (BPs) of LVFX for pneumonia and chronic respiratory tract infections were calculated to be 4 micrograms/ml and 1 microgram/ml, respectively. It was concluded that penetration of LVFX into lung tissue was satisfactory, and the tissue level of LVFX exceeded greatly the MIC90s against the typical pathogenic bacteria of respiratory tract infections. Taking the excellent BP for pneumonia, 4 micrograms/ml, into consideration, it was thought that LVFX is an effective antibacterial agent against pneumonia and other respiratory tract infections.
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Affiliation(s)
- A Fujita
- Department of Surgery II, Kyorin University School of Medicine, Tokyo, Japan
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Kanaki T, Bujo H, Hirayama S, Ishii I, Morisaki N, Schneider WJ, Saito Y. Expression of LR11, a mosaic LDL receptor family member, is markedly increased in atherosclerotic lesions. Arterioscler Thromb Vasc Biol 1999; 19:2687-95. [PMID: 10559012 DOI: 10.1161/01.atv.19.11.2687] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Receptors belonging to the LDL receptor (LDLR) family are thought to play key roles in lipoprotein metabolism in a variety of tissues, including the arterial wall. Here, we report that the expression of a 250-kDa mosaic LDLR family member, which we called LR11 for the presence of 11 ligand-binding repeats, is markedly induced during the process of atherogenesis in 2 animal models. Analysis by reverse transcription-polymerase chain reaction and RNase protection assays revealed that LR11 transcript levels rise in rabbit aortas displaying atheromatous lesions after the rabbits have been fed a high-cholesterol diet. Immunohistochemistry demonstrated that the highest induction of LR11 occurs in intimal smooth muscle cells (SMCs), followed by medial SMCs close to the intimal border of the atheromatous lesions. Experimental intimal hyperplasia by endothelial denudation showed that LR11 mRNA levels were also increased in the arteries after balloon injury, with the transcripts localized primarily in the hyperplastic intimal layer. In agreement with the correlation of LR11 induction during increased cell proliferation, cultured SMCs showed an increase in LR11 expression in the proliferative phase. Furthermore, Northern and Western blot analyses showed that medium conditioned by the monocyte-macrophage cell line THP-1 enhanced LR11 expression in cultured SMCs. These findings suggest that upregulation of LR11 might be contributing to the pathological roles of intimal and medial SMCs during arteriosclerotic lesion development and provide the first insight into the as yet unknown functional significance of this intriguing LDLR family member.
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MESH Headings
- Angioplasty, Balloon/adverse effects
- Animals
- Aorta/cytology
- Arteriosclerosis/pathology
- Arteriosclerosis/physiopathology
- Carotid Artery, Common/pathology
- Carotid Artery, Common/physiopathology
- Cells, Cultured
- Cholesterol, Dietary/pharmacology
- Culture Media, Conditioned/pharmacology
- Diet, Atherogenic
- Disease Models, Animal
- Endothelium, Vascular/pathology
- Gene Expression/drug effects
- In Situ Hybridization
- Male
- Membrane Transport Proteins
- Mosaicism
- Muscle, Smooth, Vascular/chemistry
- Muscle, Smooth, Vascular/injuries
- Muscle, Smooth, Vascular/pathology
- RNA, Messenger/analysis
- Rabbits
- Receptors, LDL/analysis
- Receptors, LDL/genetics
- Reverse Transcriptase Polymerase Chain Reaction
- Transcription, Genetic
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Affiliation(s)
- T Kanaki
- Second Department of Internal Medicine, School of Medicine, Chiba University, Japan
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