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Kawana Y, Imai J, Morizawa YM, Ikoma Y, Kohata M, Komamura H, Sato T, Izumi T, Yamamoto J, Endo A, Sugawara H, Kubo H, Hosaka S, Munakata Y, Asai Y, Kodama S, Takahashi K, Kaneko K, Sawada S, Yamada T, Ito A, Niizuma K, Tominaga T, Yamanaka A, Matsui K, Katagiri H. Author Correction: Optogenetic stimulation of vagal nerves for enhanced glucose-stimulated insulin secretion and β cell proliferation. Nat Biomed Eng 2024:10.1038/s41551-024-01200-y. [PMID: 38565945 DOI: 10.1038/s41551-024-01200-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Affiliation(s)
- Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Yosuke M Morizawa
- Super-network Brain Physiology, Tohoku University Graduate School of Life Sciences, Sendai, Japan
| | - Yoko Ikoma
- Super-network Brain Physiology, Tohoku University Graduate School of Life Sciences, Sendai, Japan
| | - Masato Kohata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroshi Komamura
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toshihiro Sato
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junpei Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Haremaru Kubo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | | | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shojiro Sawada
- Division of Metabolism and Diabetes, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tetsuya Yamada
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Ito
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kuniyasu Niizuma
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Neurosurgical Engineering and Translational Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Neurosurgical Engineering and Translational Neuroscience, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Teiji Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akihiro Yamanaka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Ko Matsui
- Super-network Brain Physiology, Tohoku University Graduate School of Life Sciences, Sendai, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
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Kawana Y, Imai J, Morizawa YM, Ikoma Y, Kohata M, Komamura H, Sato T, Izumi T, Yamamoto J, Endo A, Sugawara H, Kubo H, Hosaka S, Munakata Y, Asai Y, Kodama S, Takahashi K, Kaneko K, Sawada S, Yamada T, Ito A, Niizuma K, Tominaga T, Yamanaka A, Matsui K, Katagiri H. Optogenetic stimulation of vagal nerves for enhanced glucose-stimulated insulin secretion and β cell proliferation. Nat Biomed Eng 2023:10.1038/s41551-023-01113-2. [PMID: 37945752 DOI: 10.1038/s41551-023-01113-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 09/26/2023] [Indexed: 11/12/2023]
Abstract
The enhancement of insulin secretion and of the proliferation of pancreatic β cells are promising therapeutic options for diabetes. Signals from the vagal nerve regulate both processes, yet the effectiveness of stimulating the nerve is unclear, owing to a lack of techniques for doing it so selectively and prolongedly. Here we report two optogenetic methods for vagal-nerve stimulation that led to enhanced glucose-stimulated insulin secretion and to β cell proliferation in mice expressing choline acetyltransferase-channelrhodopsin 2. One method involves subdiaphragmatic implantation of an optical fibre for the photostimulation of cholinergic neurons expressing a blue-light-sensitive opsin. The other method, which suppressed streptozotocin-induced hyperglycaemia in the mice, involves the selective activation of vagal fibres by placing blue-light-emitting lanthanide microparticles in the pancreatic ducts of opsin-expressing mice, followed by near-infrared illumination. The two methods show that signals from the vagal nerve, especially from nerve fibres innervating the pancreas, are sufficient to regulate insulin secretion and β cell proliferation.
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Affiliation(s)
- Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Yosuke M Morizawa
- Super-network Brain Physiology, Tohoku University Graduate School of Life Sciences, Sendai, Japan
| | - Yoko Ikoma
- Super-network Brain Physiology, Tohoku University Graduate School of Life Sciences, Sendai, Japan
| | - Masato Kohata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroshi Komamura
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toshihiro Sato
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junpei Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Haremaru Kubo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | | | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shojiro Sawada
- Division of Metabolism and Diabetes, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Tetsuya Yamada
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan
| | - Akira Ito
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kuniyasu Niizuma
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Neurosurgical Engineering and Translational Neuroscience, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Neurosurgical Engineering and Translational Neuroscience, Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - Teiji Tominaga
- Department of Neurosurgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akihiro Yamanaka
- Department of Neuroscience II, Research Institute of Environmental Medicine, Nagoya University, Nagoya, Japan
| | - Ko Matsui
- Super-network Brain Physiology, Tohoku University Graduate School of Life Sciences, Sendai, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
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Wilken B, Zaman M, Asai Y. Patient education in atopic dermatitis: a scoping review. Allergy Asthma Clin Immunol 2023; 19:89. [PMID: 37833754 PMCID: PMC10576377 DOI: 10.1186/s13223-023-00844-w] [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] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 09/21/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND Atopic dermatitis (AD) is a chronic inflammatory skin disease that affects children and adults. Poor treatment adherence in AD requires interventions to promote self-management; patient education in chronic diseases is key to self-management. Many international AD management guidelines published to date include a recommendation for educating patients as part of their treatment but there are no formal recommendations on how to deliver this knowledge. MAIN: We performed a scoping review to map the existing literature on patient education practices in AD and to highlight the clinical need for improved patient education in AD. The literature search was performed with the online databases MEDLINE, Embase, Grey Matters, ClinicalTrails.gov and the International Clinical Trials Registry Platform (ICTRP). The search strategy yielded 388 articles. Of the 388 articles screened, 16 studies met the eligibility criteria, and the quantitative data was summarized by narrative synthesis. The majority of studies were randomized controlled trials conducted in Europe, Asia and North America. Since 2002, there have been limited studies evaluating patient education in the treatment of AD. Frequent education methods used included group-based educational programs, educational pamphlets, individual consultations and online resources. Education was most commonly directed at caregivers and their children. Only one study compared the efficacy of different education methods. In all included studies, the heterogenous nature of outcome measures and study design limited the consistency of results. Despite the heterogeneity of studies, patient education was shown to improve quality of life (QoL), disease severity and psychological outcomes in AD patients. CONCLUSION This scoping review highlights that patient education is effective in a variety of domains relevant to AD treatment. Further comparative studies and randomized trials with longer-term follow-up are needed to provide validated and consistent patient education recommendations for AD; these may depend on age and population.
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Affiliation(s)
- Bethany Wilken
- Translational Institute of Medicine, Department of Medicine, Queen's University, Kingston, ON, Canada.
| | - M Zaman
- School of Medicine, Queen's University, Kingston, ON, Canada
| | - Y Asai
- Division of Dermatology, Department of Medicine, Queen's University, Kingston, ON, Canada
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Endo A, Imai J, Izumi T, Kawana Y, Sugawara H, Kohata M, Seike J, Kubo H, Komamura H, Sato T, Asai Y, Hosaka S, Kodama S, Takahashi K, Kaneko K, Katagiri H. Phagocytosis by macrophages promotes pancreatic β cell mass reduction after parturition in mice. Dev Cell 2023; 58:1819-1829.e5. [PMID: 37716356 DOI: 10.1016/j.devcel.2023.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 03/07/2023] [Accepted: 08/01/2023] [Indexed: 09/18/2023]
Abstract
Elucidating the mechanism(s) modulating appropriate tissue size is a critical biological issue. Pancreatic β cells increase during pregnancy via cellular proliferation, but how β cells promptly decrease to the original amount after parturition remains unclear. Herein, we demonstrate the role and mechanism of macrophage accumulation in this process. In the final stage of pregnancy, HTR1D signaling upregulates murine β cell CXCL10, thereby promoting macrophage accumulation in pancreatic islets via the CXCL10-CXCR3 axis. Blocking this mechanism by administering an HTR1D antagonist or the CXCR3 antibody and depleting islet macrophages inhibited postpartum β cell mass reduction. β cells engulfed by macrophages increased in postpartum islets, but Annexin V administration suppressed this engulfment and the postpartum β cell mass reduction, indicating the accumulated macrophages to phagocytose β cells. This mechanism contributes to both maintenance of appropriate β cell mass and glucose homeostasis promptly adapting to reduced systemic insulin demand after parturition.
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Affiliation(s)
- Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan.
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Masato Kohata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Junro Seike
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Haremaru Kubo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Hiroshi Komamura
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Toshihiro Sato
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan
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Sugawara H, Imai J, Yamamoto J, Izumi T, Kawana Y, Endo A, Kohata M, Seike J, Kubo H, Komamura H, Munakata Y, Asai Y, Hosaka S, Sawada S, Kodama S, Takahashi K, Kaneko K, Katagiri H. A highly sensitive strategy for monitoring real-time proliferation of targeted cell types in vivo. Nat Commun 2023; 14:3253. [PMID: 37316473 DOI: 10.1038/s41467-023-38897-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 05/22/2023] [Indexed: 06/16/2023] Open
Abstract
Cell proliferation processes play pivotal roles in timely adaptation to many biological situations. Herein, we establish a highly sensitive and simple strategy by which time-series showing the proliferation of a targeted cell type can be quantitatively monitored in vivo in the same individuals. We generate mice expressing a secreted type of luciferase only in cells producing Cre under the control of the Ki67 promoter. Crossing these with tissue-specific Cre-expressing mice allows us to monitor the proliferation time course of pancreatic β-cells, which are few in number and weakly proliferative, by measuring plasma luciferase activity. Physiological time courses, during obesity development, pregnancy and juvenile growth, as well as diurnal variation, of β-cell proliferation, are clearly detected. Moreover, this strategy can be utilized for highly sensitive ex vivo screening for proliferative factors for targeted cells. Thus, these technologies may contribute to advancements in broad areas of biological and medical research.
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Affiliation(s)
- Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Junpei Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masato Kohata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junro Seike
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Haremaru Kubo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroshi Komamura
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuichiro Munakata
- Division of Metabolism and Diabetes, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shojiro Sawada
- Division of Metabolism and Diabetes, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
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Takahashi K, Yamada T, Hosaka S, Kaneko K, Asai Y, Munakata Y, Seike J, Horiuchi T, Kodama S, Izumi T, Sawada S, Hoshikawa K, Inoue J, Masamune A, Ueno Y, Imai J, Katagiri H. Inter-organ insulin-leptin signal crosstalk from the liver enhances survival during food shortages. Cell Rep 2023:112415. [PMID: 37116488 DOI: 10.1016/j.celrep.2023.112415] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 02/27/2023] [Accepted: 04/04/2023] [Indexed: 04/30/2023] Open
Abstract
Crosstalk among organs/tissues is important for regulating systemic metabolism. Here, we demonstrate inter-organ crosstalk between hepatic insulin and hypothalamic leptin actions, which maintains survival during food shortages. In inducible liver insulin receptor knockout mice, body weight is increased with hyperphagia and decreased energy expenditure, accompanied by increased circulating leptin receptor (LepR) and decreased hypothalamic leptin actions. Additional hepatic LepR deficiency reverses these metabolic phenotypes. Thus, decreased hepatic insulin action suppresses hypothalamic leptin action with increased liver-derived soluble LepR. Human hepatic and circulating LepR levels also correlate negatively with hepatic insulin action indices. In mice, food restriction decreases hepatic insulin action and energy expenditure with increased circulating LepR. Hepatic LepR deficiency increases mortality with enhanced energy expenditure during food restriction. The liver translates metabolic cues regarding energy-deficient status, which is reflected by decreased hepatic insulin action, into soluble LepR, thereby suppressing energy dissipation and assuring survival during food shortages.
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Affiliation(s)
- Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Tetsuya Yamada
- Department of Molecular Endocrinology and Metabolism, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Bunkyo, Tokyo 113-8510, Japan.
| | - Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Junro Seike
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Takahiro Horiuchi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Kyoko Hoshikawa
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata, Yamagata 990-9585, Japan
| | - Jun Inoue
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Yoshiyuki Ueno
- Department of Gastroenterology, Faculty of Medicine, Yamagata University, Yamagata, Yamagata 990-9585, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Miyagi 980-8575, Japan.
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Kohata M, Imai J, Izumi T, Yamamoto J, Kawana Y, Endo A, Sugawara H, Seiko J, Kubo H, Kawamura H, Sato T, Osaka S, Munakata Y, Asai Y, Kodama S, Takahashi K, Kaneko K, Katagiri H. Roles of FoxM1-driven basal β-cell proliferation in maintenance of β-cell mass and glucose tolerance during adulthood. J Diabetes Investig 2022; 13:1666-1676. [PMID: 35633298 PMCID: PMC9533047 DOI: 10.1111/jdi.13846] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/12/2022] [Accepted: 05/26/2022] [Indexed: 12/03/2022] Open
Abstract
Aims/Introduction Whether basal β‐cell proliferation during adulthood is involved in maintaining sufficient β‐cell mass, and if so, the molecular mechanism(s) underlying basal β‐cell proliferation remain unclear. FoxM1 is a critical transcription factor which is known to play roles in ‘adaptive’ β‐cell proliferation, which facilitates rapid increases in β‐cell mass in response to increased insulin demands. Therefore, herein we focused on the roles of β‐cell FoxM1 in ‘basal’ β‐cell proliferation under normal conditions and in the maintenance of sufficient β‐cell mass as well as glucose homeostasis during adulthood. Materials and Methods FoxM1 deficiency was induced specifically in β‐cells of 8‐week‐old mice, followed by analyzing its short‐ (2 weeks) and long‐ (10 months) term effects on β‐cell proliferation, β‐cell mass, and glucose tolerance. Results FoxM1 deficiency suppressed β‐cell proliferation at both ages, indicating critical roles of FoxM1 in basal β‐cell proliferation throughout adulthood. While short‐term FoxM1 deficiency affected neither β‐cell mass nor glucose tolerance, long‐term FoxM1 deficiency suppressed β‐cell mass increases with impaired insulin secretion, thereby worsening glucose tolerance. In contrast, the insulin secretory function was not impaired in islets isolated from mice subjected to long‐term β‐cell FoxM1 deficiency. Therefore, β‐cell mass reduction is the primary cause of impaired insulin secretion and deterioration of glucose tolerance due to long‐term β‐cell FoxM1 deficiency. Conclusions Basal low‐level proliferation of β‐cells during adulthood is important for maintaining sufficient β‐cell mass and good glucose tolerance and β‐cell FoxM1 underlies this mechanism. Preserving β‐cell FoxM1 activity may prevent the impairment of glucose tolerance with advancing age.
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Affiliation(s)
- Masato Kohata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - June Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Juno Seiko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Hiroharu Kubo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Hiroshi Kawamura
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Toshihiro Sato
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Shinichiro Osaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 980-8575, Japan
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Horii C, Iidaka T, Muraki S, Oka H, Asai Y, Tsutsui S, Hashizume H, Yamada H, Yoshida M, Kawaguchi H, Nakamura K, Akune T, Oshima Y, Tanaka S, Yoshimura N. The cumulative incidence of and risk factors for morphometric severe vertebral fractures in Japanese men and women: the ROAD study third and fourth surveys. Osteoporos Int 2022; 33:889-899. [PMID: 34797391 DOI: 10.1007/s00198-021-06143-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 02/17/2021] [Accepted: 08/30/2021] [Indexed: 10/19/2022]
Abstract
UNLABELLED This population-based cohort study with a 3-year follow-up revealed that the annual incidence rates of vertebral fracture (VF) and severe VF (sVF) were 5.9%/year and 1.7%/year, respectively. The presence of mild VF at the baseline was a significant risk factor for incident sVF in participants without prevalent sVF. INTRODUCTION This study aimed to estimate the incidence of morphometric vertebral fracture (VF) and severe VF (sVF) in men and women and clarify whether the presence of a mild VF (mVF) increases the risk of incident sVF. METHODS Data from the population-based cohort study, entitled the Research on Osteoarthritis/Osteoporosis Against Disability (ROAD) study, were analyzed. In total, 1190 participants aged ≥ 40 years (mean age, 65.0 ± 11.2) years completed whole-spine lateral radiography both at the third (2012-2013, baseline) and fourth surveys performed 3 years later (2015-2016, follow-up). VF was defined using Genant's semi-quantitative (SQ) method: VF as SQ ≥ 1, mVF as SQ = 1, and sVF as SQ ≥ 2. Cumulative incidence of VF and sVF was estimated. Multivariate logistic regression analyses were performed to evaluate risk factors for incident sVF. RESULTS The baseline prevalence of mVF and sVF were 16.8% and 6.0%, respectively. The annual incidence rates of VF and sVF were 5.9%/year and 1.7%/year, respectively. The annual incidence rates of sVF in participants without prevalent VF, with prevalent mVF, and with prevalent sVF were 0.6%/year, 3.8%/year, and 11.7%/year (p < 0.001), respectively. Multivariate logistic regression analyses in participants without prevalent sVF showed that the adjusted odds ratios for incident sVF were 4.12 [95% confident interval 1.85-9.16] and 4.53 [1.49-13.77] if the number of prevalent mVF at the baseline was 1 and ≥ 2, respectively. CONCLUSIONS The annual incidence rates of VF and sVF were 5.9%/year and 1.7%/year, respectively. The presence of prevalent mVF was an independent risk factor for incident sVF.
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Affiliation(s)
- C Horii
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - T Iidaka
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - S Muraki
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - H Oka
- Department of Medical Research and Management for Musculoskeletal Pain, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Y Asai
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - S Tsutsui
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - H Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - H Yamada
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - M Yoshida
- Department of Orthopaedic Surgery, Wakayama Medical University, 811-1 Kimiidera, Wakayama City, Wakayama, 641-8510, Japan
| | - H Kawaguchi
- Department of Orthopaedic Surgery, Tokyo Neurological Center, 4-1-17, Toranomon, Minato-ku, Tokyo, 105-0001, Japan
| | - K Nakamura
- Department of Orthopaedics, Towa Hospital, Towa 4-7-10, Adachi-ku, Tokyo, 120-0003, Japan
| | - T Akune
- Department of Orthopaedics, National Rehabilitation Center for Persons With Disabilities, 4-1 Namiki, Tokorozawa City, Saitama, 359-0042, Japan
| | - Y Oshima
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - S Tanaka
- Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan
| | - Noriko Yoshimura
- Department of Preventive Medicine for Locomotive Organ Disorders, 22nd Century Medical & Research Center, The University of Tokyo Hospital, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-8655, Japan.
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9
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Ho JSS, Asai Y. Commentary on the British Association of Dermatologists guidelines for the management of people with rosacea 2021. Br J Dermatol 2021; 185:689-690. [PMID: 34378187 DOI: 10.1111/bjd.20631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/02/2021] [Accepted: 07/03/2021] [Indexed: 11/29/2022]
Affiliation(s)
- J S S Ho
- School of Medicine, Queen's University, Kingston, ON, Canada
| | - Y Asai
- School of Medicine, Queen's University, Kingston, ON, Canada.,Division of Dermatology, Department of Medicine, Queen's University, Kingston, ON, Canada
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10
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Sawada S, Kodama S, Tsuchiya S, Kurosawa S, Endo A, Sugawara H, Hosaka S, Kawana Y, Asai Y, Yamamoto J, Munakata Y, Izumi T, Takahashi K, Kaneko K, Imai J, Imoto H, Tanaka N, Naitoh T, Ishigaki Y, Katagiri H. Continuous glucose monitoring in patients with remission of type 2 diabetes after laparoscopic sleeve gastrectomy without or with duodenojejunal bypass. Clin Obes 2020; 10:e12409. [PMID: 32892484 DOI: 10.1111/cob.12409] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [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: 05/04/2020] [Revised: 07/21/2020] [Accepted: 08/08/2020] [Indexed: 01/09/2023]
Abstract
Bariatric surgery is associated with a high remission rate of type 2 diabetes mellitus. However, it is unclear whether patients showing remission of diabetes actually have normal blood glucose levels throughout the day. We therefore performed continuous glucose monitoring (CGM) in 15 ambulatory patients showing remission of diabetes after laparoscopic sleeve gastrectomy (LSG) without or with duodenojejunal bypass (DJB) at the time of diabetic remission (12.9 ± 1.8 months after bariatric surgery). The definition of remission of diabetes was based on the American Diabetes Association criteria. The mean, SD, and coefficient of variation (CV) of glucose calculated from CGM were 6.2 ± 0.6 mmol/L, 1.5 ± 0.4 mmol/L, and 23.7 ± 6.2%, respectively. These values were higher than those of healthy participants without diabetes previously reported. The percentages of time spent above 10.0 mmol/L and below 3.9 mmol/L were 2.6 (IQR 0-5.0)% and 0 (IQR 0-8.0)%, respectively. Thus, patients with remission of diabetes after LSG or LSG/DJB still had substantial periods of hyperglycemia and hypoglycemia throughout the day. Therefore, we must manage patients with diabetes carefully, even after apparent remission of type 2 diabetes in response to bariatric surgery.
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Affiliation(s)
- Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Diabetes and Metabolism, Tohoku Medical and Pharmaceutical University, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Satoko Tsuchiya
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Satoko Kurosawa
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junpei Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hirofumi Imoto
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Naoki Tanaka
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takeshi Naitoh
- Department of Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
- Department of Colorectal Surgery, Kitasato University School of Medicine, Sagamihara, Japan
| | - Yasushi Ishigaki
- Division of Diabetes and Endocrinology, Department of Internal Medicine, Iwate Medical University, Morioka, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
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11
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Hayashi K, Fukuyasu-Matsuo S, Inoue T, Fujiwara M, Asai Y, Iwata M, Suzuki S. Effects of cyclic stretching exercise on long-lasting hyperalgesia, joint contracture, and muscle injury following cast immobilization in rats. Physiol Res 2020; 69:861-870. [PMID: 32901491 DOI: 10.33549/physiolres.934437] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The effects of exercise on mechanical hyperalgesia, joint contracture, and muscle injury resulting from immobilization are not completely understood. This study aimed to investigate the effects of cyclic stretching on these parameters in a rat model of chronic post-cast pain (CPCP). Seventeen 8-week-old Wistar rats were randomly assigned to (1) control group, (2) immobilization (CPCP) group, or (3) immobilization and stretching exercise (CPCP+STR) group. In the CPCP and CPCP+STR groups, both hindlimbs of each rat were immobilized in full plantar flexion with a plaster cast for a 4-week period. In the CPCP+STR group, cyclic stretching exercise was performed 6 days/week for 2 weeks, beginning immediately after cast removal prior to reloading. Although mechanical hyperalgesia in the plantar skin and calf muscle, ankle joint contracture, and gastrocnemius muscle injury were observed in both immobilized groups, these changes were significantly less severe in the CPCP+STR group than in the CPCP group. These results clearly demonstrate the beneficial effect of cyclic stretching exercises on widespread mechanical hyperalgesia, joint contracture, and muscle injury in a rat model of CPCP.
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Affiliation(s)
- K Hayashi
- Multidisciplinary Pain Center, Aichi Medical University, Nagakute, Japan, Department of Rehabilitation, Faculty of Health Sciences, Nihon Fukushi University, Handa, Japan.
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12
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Sawada S, Tsuchiya S, Kodama S, Kurosawa S, Endo A, Sugawara H, Hosaka S, Kawana Y, Asai Y, Yamamoto J, Munakata Y, Izumi T, Takahashi K, Kaneko K, Imai J, Ito A, Yasuda M, Kunikata H, Nakazawa T, Katagiri H. Vascular resistance of carotid and vertebral arteries is associated with retinal microcirculation measured by laser speckle flowgraphy in patients with type 2 diabetes mellitus. Diabetes Res Clin Pract 2020; 165:108240. [PMID: 32502691 DOI: 10.1016/j.diabres.2020.108240] [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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2020] [Revised: 03/01/2020] [Accepted: 05/21/2020] [Indexed: 01/31/2023]
Abstract
AIMS Evaluation of the retinal microcirculation is key to understanding retinal vasculopathies, such as diabetic retinopathy. Laser speckle flowgraphy (LSFG) has recently enabled us to directly evaluate the vascular resistance in both retinal vessels and capillaries, non-invasively. We therefore assessed whether retinal vessel blood flow and/or the capillary microcirculation are associated with blood flow in the cervical arteries in diabetic patients without severe retinopathy. METHODS We enrolled 110 type 2 diabetes patients, with no or mild non-proliferative diabetic retinopathy, in this prospective cross-sectional study. We measured the resistivity indices (RIs) of the retinal vessel and capillaries by LSFG and those of cervical arteries by Doppler ultrasonography, followed by analyzing associations. RESULTS The RIs of not only the carotid but also vertebral arteries were associated with those of retinal vessel blood flow and the retinal capillary microcirculation. Multiple regression analyses revealed these associations to be independent of other explanatory variables including age and diabetes duration. CONCLUSIONS We obtained novel and direct evidence demonstrating a close association between the retinal microcirculation and cervical artery hemodynamics in diabetic patients. These findings suggest shared mechanisms to underlie micro- and macro-angiopathies. Thus, high vascular resistance of cervical arteries may be a risk of developing retinopathy.
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Affiliation(s)
- Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Satoko Tsuchiya
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Satoko Kurosawa
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junpei Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Azusa Ito
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masayuki Yasuda
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroshi Kunikata
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toru Nakazawa
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan.
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13
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Hosaka S, Yamada T, Takahashi K, Dan T, Kaneko K, Kodama S, Asai Y, Munakata Y, Endo A, Sugawara H, Kawana Y, Yamamoto J, Izumi T, Sawada S, Imai J, Miyata T, Katagiri H. Inhibition of Plasminogen Activator Inhibitor-1 Activation Suppresses High Fat Diet-Induced Weight Gain via Alleviation of Hypothalamic Leptin Resistance. Front Pharmacol 2020; 11:943. [PMID: 32670063 PMCID: PMC7327106 DOI: 10.3389/fphar.2020.00943] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 04/15/2020] [Accepted: 06/10/2020] [Indexed: 12/22/2022] Open
Abstract
Leptin resistance is an important mechanism underlying the development and maintenance of obesity and is thus regarded as a promising target of obesity treatment. Plasminogen activator inhibitor 1 (PAI-1), a physiological inhibitor of tissue-type and urokinase-type plasminogen activators, is produced at high levels in adipose tissue, especially in states of obesity, and is considered to primarily be involved in thrombosis. PAI-1 may also have roles in inter-organ tissue communications regulating body weight, because PAI-1 knockout mice reportedly exhibit resistance to high fat diet (HFD)-induced obesity. However, the role of PAI-1 in body weight regulation and the underlying mechanisms have not been fully elucidated. We herein studied how PAI-1 affects systemic energy metabolism. We examined body weight and food intake of PAI-1 knockout mice fed normal chow or HFD. We also examined the effects of pharmacological inhibition of PAI-1 activity by a small molecular weight compound, TM5441, on body weight, leptin sensitivities, and expressions of thermogenesis-related genes in brown adipose tissue (BAT) of HFD-fed wild type (WT) mice. Neither body weight gain nor food intake was reduced in PAI-1 KO mice under chow fed conditions. On the other hand, under HFD feeding conditions, food intake was decreased in PAI-1 KO as compared with WT mice (HFD-WT mice 3.98 ± 0.08 g/day vs HFD-KO mice 3.73 ± 0.07 g/day, P = 0.021), leading to an eventual significant suppression of weight gain (HFD-WT mice 40.3 ± 1.68 g vs HFD-KO mice 34.6 ± 1.84 g, P = 0.039). Additionally, TM5441 treatment of WT mice pre-fed the HFD resulted in a marked suppression of body weight gain in a PAI-1-dependent manner (HFD-WT-Control mice 37.6 ± 1.07 g vs HFD-WT-TM5441 mice 33.8 ± 0.97 g, P = 0.017). TM5441 treatment alleviated HFD-induced systemic and hypothalamic leptin resistance, before suppression of weight gain was evident. Moreover, improved leptin sensitivity in response to TM5441 treatment was accompanied by increased expressions of thermogenesis-related genes such as uncoupling protein 1 in BAT (HFD-WT-Control mice 1.00 ± 0.07 vs HFD-WT-TM5441 mice 1.32 ± 0.05, P = 0.002). These results suggest that PAI-1 plays a causative role in body weight gain under HFD-fed conditions by inducing hypothalamic leptin resistance. Furthermore, they indicate that pharmacological inhibition of PAI-1 activity is a potential strategy for alleviating diet-induced leptin resistance in obese subjects.
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Affiliation(s)
- Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Yamada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takashi Dan
- Department of Molecular Medicine and Therapy, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Akira Endo
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroto Sugawara
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yohei Kawana
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junpei Yamamoto
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tomohito Izumi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Toshio Miyata
- Department of Molecular Medicine and Therapy, United Center for Advanced Research and Translational Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
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14
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Asai Y. The effect of integrated volitional control electrical stimulation (IVES) toward chronic stroke patients. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1500] [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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15
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Kaneko K, Satake C, Izumi T, Tanaka M, Yamamoto J, Asai Y, Sawada S, Imai J, Yamada T, Katagiri H. Enhancement of postprandial endogenous insulin secretion rather than exogenous insulin injection ameliorated insulin antibody-induced unstable diabetes: a case report. BMC Endocr Disord 2019; 19:5. [PMID: 30621663 PMCID: PMC6325663 DOI: 10.1186/s12902-018-0326-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 12/13/2018] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Insulin injection, especially with insulin analogs, occasionally induces the production of insulin antibodies with high binding capacity and low affinity, similar to the insulin autoantibodies characteristic of insulin autoimmune syndrome (IAS). Production of these "IAS-like" insulin antibodies causes marked glycemic fluctuations with postprandial hyperglycemia and fasting hypoglycemia. CASE PRESENTATION A 66-year-old man with a 27-year history of diabetes was admitted because of marked glycemic fluctuations. Human insulin treatment had been initiated at age 56, followed by multiple daily injections of insulin analogs 5 years later. After the initial year of insulin analog treatment, the patient began to experience frequent morning hypoglycemic attacks and day-time hyperglycemia. Marked hyperinsulinemia (4500 μU/mL) and high titers of insulin antibodies (80.4%) with high binding capacity and low affinity indicated that IAS-like insulin antibodies were causing severe glucose fluctuations. Altering insulin formulations (insulin aspart → regular human insulin→ insulin lispro) proved to be ineffective. After several therapeutic trials, cessation of exogenous insulin and addition of mitiglinide to liraglutide with voglibose finally attenuated glycemic fluctuations with increased postprandial insulin secretion. Continuous glucose monitoring revealed improvement of morning hypoglycemia and postprandial hyperglycemia with smaller mean amplitude of glycemic excursion. Therefore, compared to exogenously injected insulin, endogenously secreted insulin directly and rapidly acts on hepatocytes and suppresses postprandial glucose output. CONCLUSIONS Proper enhancement of postprandial endogenous insulin aimed at suppressing postprandial glucose output without stimulating excessive glucose uptake in the periphery is potentially useful for treating diabetes with insulin antibody-induced glycemic instability.
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Affiliation(s)
- Keizo Kaneko
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Chihiro Satake
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Tomohito Izumi
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Mamiko Tanaka
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Junpei Yamamoto
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Yoichiro Asai
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Shojiro Sawada
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Junta Imai
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Tetsuya Yamada
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
| | - Hideki Katagiri
- Department of Diabetes and Metabolism, Tohoku University Hospital, 2-1 Seiryo, Aoba-ku, Sendai, Miyagi 980-8575 Japan
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Watanabe K, Sakuraya A, Kawakami N, Imamura K, Ando E, Asai Y, Eguchi H, Kobayashi Y, Nishida N, Arima H, Shimazu A, Tsutsumi A. Work-related psychosocial factors and metabolic syndrome onset among workers: a systematic review and meta-analysis. Obes Rev 2018; 19:1557-1568. [PMID: 30047228 DOI: 10.1111/obr.12725] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 05/14/2018] [Accepted: 05/31/2018] [Indexed: 12/12/2022]
Abstract
BACKGROUND Work-related psychosocial factors have been associated with metabolic syndrome. However, no systematic reviews or meta-analyses have evaluated this association. METHODS A systematic literature search was conducted, using PubMed, Embase, PsycINFO, PsycARTICLES and the Japan Medical Abstracts Society. Eligible studies included those that examined the previously mentioned association; had a longitudinal or prospective cohort design; were conducted among workers; provided sufficient data for calculating odds ratios, relative risks or hazard ratios with 95% confidence intervals; were original articles in English or Japanese; and were published no later than 2016. Study characteristics, exposure and outcome variables and association measures of studies were extracted by the investigators independently. RESULTS Among 4,664 identified studies, 8 were eligible for review and meta-analysis. The pooled risk of adverse work-related stress on metabolic syndrome onset was significant and positive (RR = 1.47; 95% CI, 1.22-1.78). Sensitivity analyses limiting only the effects of job strain and shift work also indicated a significant positive relationship (RR = 1.75; 95% CI, 1.09-2.79; and RR = 1.59; 95% CI, 1.00-2.54, P = 0.049 respectively). CONCLUSION This study reveals a strong positive association between work-related psychosocial factors and an elevated risk of metabolic syndrome onset. The effects of job strain and shift work on metabolic syndrome appear to be significant.
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Affiliation(s)
- K Watanabe
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - A Sakuraya
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - N Kawakami
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - K Imamura
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - E Ando
- Department of Social and Environmental Health, Division of Environmental Medicine and Population Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Y Asai
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - H Eguchi
- Department of Public Health, Kitasato University School of Medicine, Sagamihara-shi, Kanagawa, Japan
| | | | - N Nishida
- Kyoto Industrial Health Association, Kyoto, Japan
| | - H Arima
- Department of Mental Health, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - A Shimazu
- Center for Human and Social Sciences, Kitasato University College of Liberal Arts and Sciences, Sagamihara-shi, Kanagawa, Japan
| | - A Tsutsumi
- Department of Public Health, Kitasato University School of Medicine, Sagamihara-shi, Kanagawa, Japan
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Asai Y, Nishiura H. Identifying the transmission route of influenza A(H1N1) 2009 in Japan by geographic, effective and phylogenetic distances. Int J Infect Dis 2018. [DOI: 10.1016/j.ijid.2018.04.3891] [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: 10/28/2022] Open
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Miyazaki M, Asai Y, Iwakura M, Hara M. 0442 Safety and Efficacy of Suvorexant in a Real World Setting: Results from the Drug Use-results Survey in Japan. Sleep 2018. [DOI: 10.1093/sleep/zsy061.441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Kawakami N, Imamura K, Asai Y, Watanabe K, Tsutsumi A, Shimazu A, Inoue A, Hiro H, Odagiri Y, Yoshikawa T, Yoshikawa E. 1211 The stress check program: an evaluation of the first-year implementation of the new national workplace mental health program in japan. Health Serv Res 2018. [DOI: 10.1136/oemed-2018-icohabstracts.444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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Munakata Y, Yamada T, Imai J, Takahashi K, Tsukita S, Shirai Y, Kodama S, Asai Y, Sugisawa T, Chiba Y, Kaneko K, Uno K, Sawada S, Hatakeyama H, Kanzaki M, Miyazaki JI, Oka Y, Katagiri H. Olfactory receptors are expressed in pancreatic β-cells and promote glucose-stimulated insulin secretion. Sci Rep 2018; 8:1499. [PMID: 29367680 PMCID: PMC5784078 DOI: 10.1038/s41598-018-19765-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [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: 06/21/2017] [Accepted: 01/04/2018] [Indexed: 11/25/2022] Open
Abstract
Olfactory receptors (ORs) mediate olfactory chemo-sensation in OR neurons. Herein, we have demonstrated that the OR chemo-sensing machinery functions in pancreatic β-cells and modulates insulin secretion. First, we found several OR isoforms, including OLFR15 and OLFR821, to be expressed in pancreatic islets and a β-cell line, MIN6. Immunostaining revealed OLFR15 and OLFR821 to be uniformly expressed in pancreatic β-cells. In addition, mRNAs of Olfr15 and Olfr821 were detected in single MIN6 cells. These results indicate that multiple ORs are simultaneously expressed in individual β-cells. Octanoic acid, which is a medium-chain fatty acid contained in food and reportedly interacts with OLFR15, potentiated glucose-stimulated insulin secretion (GSIS), thereby improving glucose tolerance in vivo. GSIS potentiation by octanoic acid was confirmed in isolated pancreatic islets and MIN6 cells and was blocked by OLFR15 knockdown. While Gαolf expression was not detectable in β-cells, experiments using inhibitors and siRNA revealed that the pathway dependent on phospholipase C-inositol triphosphate, rather than cAMP-protein kinase A, mediates GSIS potentiation via OLFR15. These findings suggest that the OR system in pancreatic β-cells has a chemo-sensor function allowing recognition of environmental substances obtained from food, and potentiates insulin secretion in a cell-autonomous manner, thereby modulating systemic glucose metabolism.
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Affiliation(s)
- Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Tetsuya Yamada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan. .,Center for Metabolic Diseases, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan.
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Sohei Tsukita
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Yuta Shirai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Takashi Sugisawa
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Yumiko Chiba
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Kenji Uno
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Hiroyasu Hatakeyama
- Graduate School of Biomedical Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Makoto Kanzaki
- Center for Metabolic Diseases, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan.,Graduate School of Biomedical Engineering, Tohoku University, Sendai, 980-8579, Japan
| | - Jun-Ichi Miyazaki
- Division of Stem Cell Regulation Research, Osaka University Graduate School of Medicine, Suita, 565-0871, Japan
| | - Yoshitomo Oka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan.,Center for Metabolic Diseases, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan.,Japan Agency for Medical Research and Development (AMED), CREST, Chiyoda-ku, Tokyo, 100-0004, Japan
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Miyazaki M, Asai Y, Iwakura M, Hara M. Safety and efficacy of suvorexant in a real world setting: interim results from the drug use-results survey in Japan. Sleep Med 2017. [DOI: 10.1016/j.sleep.2017.11.669] [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: 10/18/2022]
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22
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Asai Y, Yamada T, Tsukita S, Takahashi K, Maekawa M, Honma M, Ikeda M, Murakami K, Munakata Y, Shirai Y, Kodama S, Sugisawa T, Chiba Y, Kondo Y, Kaneko K, Uno K, Sawada S, Imai J, Nakamura Y, Yamaguchi H, Tanaka K, Sasano H, Mano N, Ueno Y, Shimosegawa T, Katagiri H. Activation of the Hypoxia Inducible Factor 1α Subunit Pathway in Steatotic Liver Contributes to Formation of Cholesterol Gallstones. Gastroenterology 2017; 152:1521-1535.e8. [PMID: 28088462 DOI: 10.1053/j.gastro.2017.01.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [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: 08/13/2016] [Revised: 01/05/2017] [Accepted: 01/05/2017] [Indexed: 02/08/2023]
Abstract
BACKGROUND & AIMS Hypoxia-inducible factor 1α subunit (HIF1A) is a transcription factor that controls the cellular response to hypoxia and is activated in hepatocytes of patients with nonalcoholic fatty liver disease (NAFLD). NAFLD increases the risk for cholesterol gallstone disease by unclear mechanisms. We studied the relationship between HIF1A and gallstone formation associated with liver steatosis. METHODS We performed studies with mice with inducible disruption of Hif1a in hepatocytes via a Cre adenoviral vector (inducible hepatocyte-selective HIF1A knockout [iH-HIFKO] mice), and mice without disruption of Hif1a (control mice). Mice were fed a diet rich in cholesterol and cholate for 1 or 2 weeks; gallbladders were collected and the number of gallstones was determined. Livers and biliary tissues were analyzed by histology, quantitative reverse-transcription polymerase chain reaction, immunohistochemistry, and immunoblots. We measured concentrations of bile acid, cholesterol, and phospholipid in bile and rates of bile flow. Primary hepatocytes and cholangiocytes were isolated and analyzed. HIF1A was knocked down in Hepa1-6 cells with small interfering RNAs. Liver biopsy samples from patients with NAFLD, with or without gallstones, were analyzed by quantitative reverse-transcription polymerase chain reaction. RESULTS Control mice fed a diet rich in cholesterol and cholate developed liver steatosis with hypoxia; levels of HIF1A protein were increased in hepatocytes around central veins and 90% of mice developed cholesterol gallstones. Only 20% of the iH-HIFKO mice developed cholesterol gallstones. In iH-HIFKO mice, the biliary lipid concentration was reduced by 36%, compared with control mice, and bile flow was increased by 35%. We observed increased water secretion from hepatocytes into bile canaliculi to mediate these effects, resulting in suppression of cholelithogenesis. Hepatic expression of aquaporin 8 (AQP8) protein was 1.5-fold higher in iH-HIFKO mice than in control mice. Under hypoxic conditions, cultured hepatocytes increased expression of Hif1a, Hmox1, and Vegfa messenger RNAs (mRNAs), and down-regulated expression of AQP8 mRNA and protein; AQP8 down-regulation was not observed in cells with knockdown of HIF1A. iH-HIFKO mice had reduced inflammation and mucin deposition in the gallbladder compared with control mice. Liver tissues from patients with NAFLD with gallstones had increased levels of HIF1A, HMOX1, and VEGFA mRNAs, compared with livers from patients with NAFLD without gallstones. CONCLUSIONS In steatotic livers of mice, hypoxia up-regulates expression of HIF1A, which reduces expression of AQP8 and concentrates biliary lipids via suppression of water secretion from hepatocytes. This promotes cholesterol gallstone formation. Livers from patients with NAFLD and gallstones express higher levels of HIF1A than livers from patients with NAFLD without gallstones.
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Affiliation(s)
- Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Tetsuya Yamada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan.
| | - Sohei Tsukita
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masamitsu Maekawa
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan
| | - Midori Honma
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Masanori Ikeda
- Department of Molecular Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Keigo Murakami
- Department of Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yuta Shirai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Takashi Sugisawa
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yumiko Chiba
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasuteru Kondo
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Kenji Uno
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Yasuhiro Nakamura
- Department of Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hiroaki Yamaguchi
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan
| | - Kozo Tanaka
- Department of Molecular Oncology, Institute of Development, Aging and Cancer, Tohoku University, Sendai, Japan
| | - Hironobu Sasano
- Department of Pathology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Nariyasu Mano
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan
| | - Yoshiyuki Ueno
- Department of Gastroenterology, Yamagata University Faculty of Medicine, Yamagata, Japan
| | - Tooru Shimosegawa
- Division of Gastroenterology, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, Japan; Japan Agency for Medical Research and Development, Core Research for Evolutional Science and Technology (CREST), Tokyo, Japan
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Asai Y, Ohyama Y, Taiji Y, Makimura Y, Tamai R, Hashimoto M, Ogawa T. Treponema medium Glycoconjugate Inhibits Activation of Human Gingival Fibroblasts Stimulated with Phenol-Water Extracts of Periodontopathic Bacteria. J Dent Res 2016; 84:456-61. [PMID: 15840783 DOI: 10.1177/154405910508400511] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Oral treponemes are well-known as causative agents of periodontal diseases; however, the details have not been fully clarified. Here, we examined the effects of Treponema medium glycoconjugate on the activation of human gingival fibroblasts using phenol-water extracts from Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum subsp. nucleatum, and Actinobacillus actinomycetemcomitans. The phenol-water extracts activated human gingival fibroblasts to mediate IL-8 production, as well as IL-8 mRNA expression, phosphorylation of p38 mitogen-activated protein kinase, and expression of intercellular adhesion molecule-1. T. medium glycoconjugate exhibited no activation of human gingival fibroblasts, while phenol-water extract-induced activation of human gingival fibroblasts was clearly inhibited by T. medium glycoconjugate. Furthermore, binding of biotinylated phenol-water extracts to CD14 in the presence of LPS-binding protein was blocked with T. medium glycoconjugate. These results suggest that T. medium glycoconjugate has an inhibitory effect on host cell activation by periodontopathic bacteria caused by binding to CD14- and LPS-binding protein.
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Affiliation(s)
- Y Asai
- Department of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan
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Abstract
Dioxin, a powerful hormone-disrupting chemical, exhibits serious health effects when it reaches body fat. Here we analyzed coplanar polychlorinated biphenyls (PCBs) and polychlorinated-dibenzo- p-dioxins (PCDDs) in human saliva as compared with blood specimens, and examined their effects on human gingival epithelial cells (HGEC). High levels of tri- and tetrachlorinated PCBs were found in saliva, whereas we detected predominantly hexa- and heptachlorinated PCBs in blood. Among PCDDs, the saliva and blood specimens contained mainly 1,2,3,4,6,7,8,9-octachlorodibenzo- p-dioxin (OCDD). Among the toxic dioxins proposed by the World Health Organization (WHO) in 1998, 2,3′,4,4′,5-pentachlorobiphenyl (PCB 118) and OCDD, which were mainly found in saliva, significantly induced IL-8 production in HGEC. Furthermore, these two dioxins markedly augmented IL-8 production stimulated with fimbriae from Porphyromonas gingivalis, which is well-known as a pathogenic factor in periodontal diseases. These results suggest that dioxins in saliva may be a risk factor for periodontal diseases.
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Affiliation(s)
- T Ogawa
- Department of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan.
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Tsukita S, Yamada T, Takahashi K, Munakata Y, Hosaka S, Takahashi H, Gao J, Shirai Y, Kodama S, Asai Y, Sugisawa T, Chiba Y, Kaneko K, Uno K, Sawada S, Imai J, Katagiri H. MicroRNAs 106b and 222 Improve Hyperglycemia in a Mouse Model of Insulin-Deficient Diabetes via Pancreatic β-Cell Proliferation. EBioMedicine 2016; 15:163-172. [PMID: 27974246 PMCID: PMC5233820 DOI: 10.1016/j.ebiom.2016.12.002] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [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: 05/11/2016] [Revised: 11/16/2016] [Accepted: 12/04/2016] [Indexed: 01/01/2023] Open
Abstract
Major symptoms of diabetes mellitus manifest, once pancreatic β-cell numbers have become inadequate. Although natural regeneration of β-cells after injury is very limited, bone marrow (BM) transplantation (BMT) promotes their regeneration through undetermined mechanism(s) involving inter-cellular (BM cell-to-β-cell) crosstalk. We found that two microRNAs (miRNAs) contribute to BMT-induced β-cell regeneration. Screening murine miRNAs in serum exosomes after BMT revealed 42 miRNAs to be increased. Two of these miRNAs (miR-106b-5p and miR-222-3p) were shown to be secreted by BM cells and increased in pancreatic islet cells after BMT. Treatment with the corresponding anti-miRNAs inhibited BMT-induced β-cell regeneration. Furthermore, intravenous administration of the corresponding miRNA mimics promoted post-injury β-cell proliferation through Cip/Kip family down-regulation, thereby ameliorating hyperglycemia in mice with insulin-deficient diabetes. Thus, these identified miRNAs may lead to the development of therapeutic strategies for diabetes. BMT regenerates β-cells in mice with STZ-induced diabetes and increases miR-106b and miR-222 in serum exosomes and islets. Inhibition with anti-miRs against these miRs suppresses BMT-induced β-cell regeneration. Injection of miR-106b and miR-222 mimics promotes β-cell proliferation and improves hyperglycemia in STZ-treated mice.
Regeneration of pancreatic β-cells is a promising therapeutic strategy not only for type 1 diabetes but also for certain forms of type 2 diabetes. However, natural regeneration of β-cells hardly ever occurs. Interestingly, bone marrow transplantation (BMT) has been shown to promote β-cell regeneration through an undetermined mechanism(s). In this study, we found that two microRNAs (miR-106b/-222) contribute to BMT-induced β-cell proliferation. Inhibition of miR-106b/-222 using specific anti-miRNAs significantly suppressed BMT-induced β-cell proliferation. Furthermore, intravenously administered miR-106b/222 promoted β-cell proliferation, thereby ameliorating hyperglycemia in mice with insulin-deficient diabetes. Thus, these identified miRNAs may lead to novel therapeutic strategies for diabetes.
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Affiliation(s)
- Sohei Tsukita
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Tetsuya Yamada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan; Centre for Metabolic Diseases, Tohoku University Graduate School of Medicine, Japan.
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Shinichiro Hosaka
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Hironobu Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Junhong Gao
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan; Tohoku University Frontier Research Institute for Interdisciplinary Science, Miyagi, Japan
| | - Yuta Shirai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Takashi Sugisawa
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Yumiko Chiba
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Keizo Kaneko
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Kenji Uno
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Japan; Centre for Metabolic Diseases, Tohoku University Graduate School of Medicine, Japan; Japan Agency for Medical Research and Development, CREST, Japan
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Matsumoto M, Ozaki Y, Kubota H, Asai Y, Kanamori H. Equivalent Spatial Frequency and Optimum Film Densities for the Perceptibility of Radiographic Contrast of Step-Edge images. ACTA ACUST UNITED AC 2016. [DOI: 10.1080/00223638.1995.11738627] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Chiba Y, Yamada T, Tsukita S, Takahashi K, Munakata Y, Shirai Y, Kodama S, Asai Y, Sugisawa T, Uno K, Sawada S, Imai J, Nakamura K, Katagiri H. Dapagliflozin, a Sodium-Glucose Co-Transporter 2 Inhibitor, Acutely Reduces Energy Expenditure in BAT via Neural Signals in Mice. PLoS One 2016; 11:e0150756. [PMID: 26963613 PMCID: PMC4786146 DOI: 10.1371/journal.pone.0150756] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 02/17/2016] [Indexed: 12/19/2022] Open
Abstract
Selective sodium glucose cotransporter-2 inhibitor (SGLT2i) treatment promotes urinary glucose excretion, thereby reducing blood glucose as well as body weight. However, only limited body weight reductions are achieved with SGLT2i treatment. Hyperphagia is reportedly one of the causes of this limited weight loss. However, the effects of SGLT2i treatment on systemic energy expenditure have not been fully elucidated. Herein, we investigated the acute effects of dapagliflozin, a SGLT2i, on systemic energy expenditure in mice. Eighteen hours after dapagliflozin treatment oxygen consumption and brown adipose tissue (BAT) expression of ucp1, a thermogenesis-related gene, were significantly decreased as compared to those after vehicle treatment. In addition, dapagliflozin significantly suppressed norepinephrine (NE) turnover in BAT and c-fos expression in the rostral raphe pallidus nucleus (rRPa) which contains the sympathetic premotor neurons responsible for thermogenesis. These findings indicate that the dapagliflozin-mediated acute decrease in energy expenditure involves a reduction in BAT thermogenesis via decreased sympathetic nerve activity from the rRPa. Furthermore, common hepatic branch vagotomy abolished the reductions in ucp1 expression and NE contents in BAT and c-fos expression in the rRPa. In addition, alterations in hepatic carbohydrate metabolism, such as decreases in glycogen contents and upregulation of phosphoenolpyruvate carboxykinase, manifested prior to the suppression of BAT thermogenesis, e.g. 6 hours after dapagliflozin treatment. Collectively, these results suggest that SGLT2i treatment acutely suppresses energy expenditure in BAT via regulation of an inter-organ neural network consisting of the common hepatic vagal branch and sympathetic nerves.
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Affiliation(s)
- Yumiko Chiba
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Tetsuya Yamada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
- * E-mail:
| | - Sohei Tsukita
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Kei Takahashi
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Yuichiro Munakata
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Yuta Shirai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Shinjiro Kodama
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Yoichiro Asai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Takashi Sugisawa
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Kenji Uno
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Shojiro Sawada
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Junta Imai
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
| | - Kazuhiro Nakamura
- Department of Integrative Physiology, Nagoya University Graduate School of Medicine, Nagoya, 466-8550, Japan
| | - Hideki Katagiri
- Department of Metabolism and Diabetes, Tohoku University Graduate School of Medicine, Sendai, 980-8575, Japan
- Japan Agency for Medical Research and Development (AMED), CREST, Sendai, 980-8575, Japan
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Asai Y, Minagawa A, Koga H, Okuyama R. Pigmented macule on the nipple. Clin Exp Dermatol 2015; 40:938-40. [PMID: 25808092 DOI: 10.1111/ced.12647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/31/2014] [Indexed: 11/28/2022]
Affiliation(s)
- Y Asai
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| | - A Minagawa
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| | - H Koga
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
| | - R Okuyama
- Department of Dermatology, Shinshu University School of Medicine, Asahi, Japan
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Lavine E, Clarke A, Joseph L, Shand G, Alizadehfar R, Asai Y, Chan ES, Harada L, Allen M, Ben-Shoshan M. Peanut avoidance and peanut allergy diagnosis in siblings of peanut allergic children. Clin Exp Allergy 2014; 45:249-54. [DOI: 10.1111/cea.12403] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Revised: 08/11/2014] [Accepted: 08/18/2014] [Indexed: 11/27/2022]
Affiliation(s)
- E. Lavine
- Department of Pediatrics; Humber River Hospital; Toronto ON Canada
| | - A. Clarke
- Department of Medicine; Division of Rheumatology; University of Calgary; Calgary AB Canada
| | - L. Joseph
- Department of Medicine; Division of Clinical Epidemiology; McGill University Health Centre; Montreal QC Canada
- Department of Epidemiology and Biostatistics; McGill University; Montreal QC Canada
| | - G. Shand
- Department of Medicine; Division of Clinical Epidemiology; McGill University Health Centre; Montreal QC Canada
| | - R. Alizadehfar
- Department of Pediatrics; Division of Pediatric Allergy and Clinical Immunology; McGill University Health Centre; Montreal QC Canada
| | - Y. Asai
- Department of Medicine; Division of Dermatology; McGill University Health Centre; Montreal QC Canada
| | - E. S. Chan
- Department of Pediatrics; Division of Allergy and Immunology; University of British Columbia; Vancouver BC Canada
| | - L. Harada
- Anaphylaxis Canada; Toronto ON Canada
| | - M. Allen
- Allergy Asthma Information Association; Toronto ON Canada
| | - M. Ben-Shoshan
- Department of Pediatrics; Division of Pediatric Allergy and Clinical Immunology; McGill University Health Centre; Montreal QC Canada
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Matsumoto K, Okumura M, Asai Y, Shimomura K, Tamura M, Nishimura Y. Statistical Process Control for EPID Dosimetry in the Quality Assurance of IMRT. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.2477] [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]
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Hochstadter E, Clarke A, LaVieille S, Alizadehfar R, Mill C, Asai Y, Eisman H, Ben-Shoshan M. 205: C-Care: Comparing Two Years of Anaphylaxis in a Canadian Pediatric Emergency Department. Paediatr Child Health 2014. [DOI: 10.1093/pch/19.6.e35-200] [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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Chad L, Ben-Shoshan M, Asai Y, Cherkaoui S, Alizadehfar R, St-Pierre Y, Harada L, Allen M, Clarke A. A majority of parents of children with peanut allergy fear using the epinephrine auto-injector. Allergy 2013; 68:1605-9. [PMID: 24410784 DOI: 10.1111/all.12262] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/07/2013] [Indexed: 11/28/2022]
Abstract
Prompt epinephrine administration is crucial in managing anaphylaxis, but epinephrine auto-injectors (EAIs) are underutilized by patients and their families. Children with peanut allergy were recruited from the Allergy Clinics at the Montreal Children's Hospital, food allergy advocacy organizations and organizations providing products to allergic individuals. Parents of children who had been prescribed an EAI were queried on whether they were fearful of using it and on factors that may contribute to fear. A majority of parents (672/1209 = 56%) expressed fear regarding the use of the EAI. Parents attributed the fear to hurting the child, using the EAI incorrectly or a bad outcome. Parents whose child had longer disease duration or a severe reaction and parents who were satisfied with the EAI training or found it easy to use were less likely to be afraid. Families may benefit from simulation training and more education on the recognition and management of anaphylaxis.
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Affiliation(s)
- L. Chad
- Department of Paediatrics; University of Toronto; Toronto ON Canada
| | - M. Ben-Shoshan
- Division of Pediatric Allergy and Clinical Immunology; Department of Pediatrics; McGill University Health Centre; Montreal QC Canada
| | - Y. Asai
- Division of Dermatology; Department of Medicine; McGill University Health Centre; Montreal QC Canada
| | - S. Cherkaoui
- Department of Medicine; University of Montreal; Montreal QC Canada
| | - R. Alizadehfar
- Division of Pediatric Allergy and Clinical Immunology; Department of Pediatrics; McGill University Health Centre; Montreal QC Canada
| | - Y. St-Pierre
- Division of Clinical Epidemiology; Department of Medicine; McGill University Health Center; Montreal QC Canada
| | - L. Harada
- Anaphylaxis Canada; Toronto ON Canada
| | - M. Allen
- Allergy Asthma Information Association; Toronto ON Canada
| | - A. Clarke
- Division of Clinical Epidemiology; Department of Medicine; McGill University Health Center; Montreal QC Canada
- Division of Clinical Immunology and Allergy; Department of Medicine; McGill University Health Center; Montreal QC Canada
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Matsumoto T, Fujita M, Hirano R, Tashiro N, Asai Y, Fukuyama S, Morimoto Y, Nakanishi Y, Watanabe K. P11 The role of chronic infection by Pseudomonas aeruginosa in the COPD pathogenesis in CCSP-deficient mice. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70256-5] [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: 10/26/2022]
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Asai Y, Kawai T, Ohtake M, Futamoto M. Crystallographic and magnetostriction properties of Fe and FeB-alloy thin films formed on MgO(100) single-crystal substrates. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134017001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Kawai T, Asai Y, Ohtake M, Takeda S, Futamoto M. Dynamic magnetic properties of Fe70Co30(100) single-crystal thin films deposited at various substrate temperatures. EPJ Web of Conferences 2013. [DOI: 10.1051/epjconf/20134013001] [Citation(s) in RCA: 4] [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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Maekawa K, Tanno K, Hase M, Mori K, Asai Y. Survival after out-of-hospital cardiac arrest during nights and weekends. Crit Care 2012. [PMCID: PMC3363687 DOI: 10.1186/cc10876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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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Kan-O K, Matsumoto K, Inoue H, Fukuyama S, Asai Y, Watanabe W, Kurokawa M, Araya J, Kuwano K, Nakanishi Y. Corticosteroids plus long-acting β2-agonists prevent double-stranded RNA-induced upregulation of B7-H1 on airway epithelium. Int Arch Allergy Immunol 2012; 160:27-36. [PMID: 22948082 DOI: 10.1159/000338430] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Accepted: 03/23/2012] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Airway viral infections provoke exacerbations of asthma and chronic obstructive pulmonary disease. B7-H1 is a costimulatory molecule that is implicated in an escape mechanism of viruses from host immune systems. This escape may be associated with the persistence of viral infection and lead to exacerbation of underlying diseases. We have shown that an analog of viral double-stranded RNA, polyinosinic-polycytidylic acid (poly IC), upregulated the expression of B7-H1 on airway epithelial cells, an effect which was corticosteroid-resistant. We investigated the effects of corticosteroids plus long-acting β(2)-agonists (LABAs; fluticasone/salmeterol or budesonide/formoterol) on the expression of B7-H1. METHODS BEAS-2B cells and primary airway epithelial cells were stimulated with poly IC or respiratory syncytial virus. The expression of B7-H1 was assessed by flow cytometry. RESULTS Poly IC upregulated the expression of B7-H1, which was suppressed by high-concentration corticosteroids but not by LABAs. The upregulation was suppressed by very low-concentration corticosteroids when used in combination with LABAs. Their combination also suppressed the virus-induced upregulation of B7-H1. Poly IC stimulation induced the nuclear translocation of nuclear factor ĸB (NF-ĸB). Inhibitors of NF-ĸB activation prevented the poly IC-induced upregulation of B7-H1. Low-concentration corticosteroids in combination with LABAs enhanced the de novo induction of IĸBα, the endogenous inhibitor of NF-ĸB activation. CONCLUSIONS Fluticasone/salmeterol or budesonide/formoterol attenuate the virus-associated upregulation of B7-H1 on airway epithelial cells via suppression of NF-ĸB activation.
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Affiliation(s)
- K Kan-O
- Research Institute for Diseases of the Chest, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
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Oikawa Y, Katsuki T, Kawasaki M, Hashiguchi A, Mukai K, Handa K, Tomita M, Kabeya Y, Asai Y, Iwase K, Hirose S, Koyama K, Atsumi Y, Shimada A. Insulinoma may mask the existence of Type 1 diabetes. Diabet Med 2012; 29:e138-41. [PMID: 22356209 DOI: 10.1111/j.1464-5491.2012.03615.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Insulinoma is a tumour of insulin-producing cells of the pancreas and is known to be one of the causes of hypoglycaemia. Usually, appropriate removal of the insulinoma results in normalization of blood glucose levels. However, we found novel cases of insulinoma, in which hyperglycaemia developed soon after resection of the insulinoma. CASE REPORT We encountered two patients with repeated hypoglycaemia caused by insulinoma. Following removal of the insulinoma, unanticipated hyperglycaemia was observed in both patients. Thereafter, their blood tests revealed low levels of serum C-peptide and high titres of anti-glutamic acid decarboxylase antibody, indicating concomitant Type 1 diabetes. Indeed, histological examination of the resected specimen revealed that one patient showed insulitis in non-tumorous pancreatic tissue in which β-cells had already disappeared. Moreover, inflammatory cells infiltrated the insulinoma, as if it were insulitis of Type 1 diabetes, suggesting the existence of anti-islet autoimmunity. CONCLUSION These are first cases of insulinoma associated with underlying Type 1 diabetes. Physicians should be aware of the possibility that insulinoma may mask Type 1 diabetes, and measurement of anti-islet autoantibodies may be helpful to find underlying Type 1 diabetes, such as in these cases. It is pathologically interesting that the immune cell infiltration into insulinoma may be suggestive of anti-islet autoimmunity.
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Affiliation(s)
- Y Oikawa
- Department of Internal Medicine, Saiseikai Central Hospital, Tokyo, Japan.
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Matsumoto K, Otsuka M, Shimomura K, Asai Y, Okumura M, Tamura M, Nishimura Y. EP-1447 COMPREHENSIVE LINEAR ACCELERATOR QA USING COMMERCIAL ANALYTIC SOFTWARE APLICATION. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71780-2] [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: 10/28/2022]
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Nishi T, Nishimura Y, Shibata T, Tamura M, Asai Y, Okumura M. Dosimetric Evaluation of Two-step Method as Adaptive Replanning Strategies for Head and Neck IMRT. Int J Radiat Oncol Biol Phys 2011. [DOI: 10.1016/j.ijrobp.2011.06.1457] [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: 10/16/2022]
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41
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Maekawa K, Sawamoto K, Uemura S, Tanno K, Mori K, Asai Y. 281 Rapidly Degradable Hydroxyethyl Starch Solutions Increase the Risk of Massive Transfusion in Blunt Trauma Patients. Ann Emerg Med 2011. [DOI: 10.1016/j.annemergmed.2011.06.311] [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: 10/17/2022]
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Naito M, Asai Y, Mori A, Kuwabara M, Okamoto A, Katase S, Hishida A, Morita E, Kawai S, Okada R, Wakai K, Hamajima N. P2-212 Association between the RANK polymorphism and the number of teeth among Japanese. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976j.45] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Kabeya Y, Tomita M, Asai Y, Katsuki T, Oikawa Y, Meguro S, Shimada A, Atsumi Y. Determinants of an optimal response to pioglitazone in terms of HDL-cholesterol. Intern Med 2011; 50:825-31. [PMID: 21498929 DOI: 10.2169/internalmedicine.50.4853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
OBJECTIVE The effect of pioglitazone on high-density lipoprotein cholesterol (HDL-C) has been attracting attention. However, there are limited data on the characteristics of patients who are likely to respond to pioglitazone in terms of the improvement in HDL-C levels (lipid responders). In the present study, the characteristics of lipid responders were investigated. METHODS Five hundred and sixty-three patients with type 2 diabetes who started pioglitazone treatment were followed for six months. They were divided into two groups according to the response to pioglitazone. Subjects whose HDL-C levels increased by 10% or more from the baseline were defined as lipid responders. The odds ratios (OR) for becoming lipid responders were calculated using logistic regression. RESULTS Significant patients' characteristics of lipid responders were age, HbA1c, HDL-C and low-density lipoprotein cholesterol (LDL-C), yielding adjusted ORs of 0.76 [95% confidence interval (CI)=0.61-0.93] for an increment of 10 years, 0.79 (95% CI=0.66-0.95) for an increment of 1%, 0.83 (95% CI=0.72-0.96) for an increment of 10 mg/dL and 0.93 (95% CI=0.87-1.00) for an increment of 10 mg/dL, respectively. Patients with sulfonylurea treatment and those with both sulfonylurea and metformin treatment were less likely to become lipid responders than diet-treated patients with ORs of 0.32 (95% CI=0.15-0.69) and 0.41 (95% CI=0.19-0.87), respectively. CONCLUSION Pioglitazone could be beneficial especially for patients with young age, low HbA1c, low HDL-C or low LDL-C levels at baseline in terms of the improvement in HDL-C levels. Use of sulfonylureas at baseline could attenuate the effect of pioglitazone on HDL-C.
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Affiliation(s)
- Yusuke Kabeya
- Department of Internal Medicine, Saiseikai Central Hospital, Japan.
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Sakamoto T, Asai Y, Nagao K, Yokota H, Tahara Y, Morimura N, Atsumi T, Nara S, Hase M. Extracorporeal cardiopulmonary resuscitation for out-of-hospital cardiac arrest. Resuscitation 2010. [DOI: 10.1016/j.resuscitation.2010.09.258] [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: 10/18/2022]
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Maekawa K, Sawamoto K, Uemura S, Tanno K, Hase M, Mori K, Asai Y. 78: Time to Esophageal Obturator Airways Placement by Emergency Medical Technicians-Basic and Survival After Out-of-Hospital Cardiac Arrest. Ann Emerg Med 2010. [DOI: 10.1016/j.annemergmed.2010.06.121] [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: 10/19/2022]
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Matsui A, Ohmura H, Asai Y, Takahashi T, Hiraga A, Okamura K, Tokimura H, Sugino T, Obitsu T, Taniguchi K. Effect of amino acid and glucose administration following exercise on the turnover of muscle protein in the hindlimb femoral region of Thoroughbreds. Equine Vet J 2010:611-6. [PMID: 17402492 DOI: 10.1111/j.2042-3306.2006.tb05613.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
REASONS FOR PERFORMING STUDY In man, muscle protein synthesis is accelerated by administering amino acids (AA) and glucose (Glu), because increased availability of amino acids and increased insulin secretion, is known to have a protein anabolic effect. However, in the horse, the effect on muscle hypertrophy of such nutrition management following exercise is unknown. OBJECTIVES To determine the effect of AA and Glu administration following exercise on muscle protein turnover in horses. We hypothesise that administration of AA and Glu after exercise effects muscle hypertrophy in horses, as already shown in man and other animals. METHODS Measurements of the rate of synthesis (Rs) and rate of degradation (Rd) of muscle protein in the hindlimb femoral region of thoroughbred horses were conducted using the isotope dilution method to assess the differences between the artery and iliac vein. Six adult Thoroughbreds received a continuous infusion of L-[ring-2H5]- phenylalanine during the study, the stable period for plasma isotope concentrations (60 min), resting periods (60 min), treadmill exercise (15 min) and recovery period (240 min). All horses were given 4 solutions (saline [Cont], 10% AA [10-AA], 10% Glu [10-Glu] and a mixture with 10% AA and 10% Glu [10-Mix]) over 120 min after exercise, and the Rs and Rd of muscle protein in the hindlimb measured. RESULTS The average Rs during the 75-120 min following administration of 10-Mix was significantly greater than for the other solutions (P<0.05). The second most effective solution was 10-AA, and there was no change in Rs after 10-Glu. CONCLUSIONS Administration of AA following exercise accelerated Rs in the hindlimb femoral region, and this effect was enhanced when combined with glucose, because of increasing insulin secretion or a decreased requirement for AA for energy. POTENTIAL RELEVANCE Further studies are required regarding the effect on muscle hypertrophy of supplementing amino acids and glucose in the feed of exercising horses.
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Affiliation(s)
- A Matsui
- Equine Science Division, Hidaka Training and Research Center, Japan Racing Association, Urakawa-gun, Hokkaido, Japan
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Ishigaki T, Asai Y, Nakahata Y, Shimada H, Baba Y, Toda K. Evacuation of aged persons from inundated underground space. Water Sci Technol 2010; 62:1807-1812. [PMID: 20962396 DOI: 10.2166/wst.2010.455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Underground is an important space that supports function of cities, such as subways, shopping malls and basement parking. However in consequence a new type of disaster, the "urban flood" menaces these spaces. In the last decade, urban floods struck Tokyo, Nagoya and Fukuoka. When underground inundation occurs, people must evacuate to the ground as soon as possible. But, when such an inundation situation happens, aged persons may not be able to evacuate quickly to ground level. In this paper, the method of safety assessment for aged persons is discussed on the experimental results and flood simulation data in an underground space. As a criterion of the safety evacuation, the specific force per unit width is used in this study. From the result of experiments, it is difficult to implement safety evacuation when the specific force per unit width is over 0.100 m(2) for the aged male.
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Affiliation(s)
- T Ishigaki
- Faculty of Environmental and Urban Engineering, Kansai University, Suita, Osaka 564-8680, Japan.
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Mori K, Sawamoto K, Maekawa K, Warabi R, Tanno K, Uemura S, Nara S, Asai Y. 72: Outcome of Cardiac Arrest After Accidental Hypothermia and Indication for Cardiopulmonary Bypass. Ann Emerg Med 2009. [DOI: 10.1016/j.annemergmed.2009.06.093] [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: 10/20/2022]
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Asai Y, Kaneko M, Ohtsuka K, Morita Y, Kaneko S, Noda H, Furukawa I, Takatori K, Hara-Kudo Y. Salmonella prevalence in seafood imported into Japan. J Food Prot 2008; 71:1460-4. [PMID: 18680947 DOI: 10.4315/0362-028x-71.7.1460] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [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
A total of 353 samples of 29 types of seafood were tested for Salmonella prevalence and total microbial population. Salmonella enterica serotype Weltevreden was isolated from 2 of 47 black tiger prawn samples. The contamination levels of Salmonella were in a range of <30 to 40 most probable number per 100 g. In addition, one sample of black tiger prawns and two samples of white shrimp were positive for Salmonella invA gene on PCR assay. Although the mean aerobic bacterial count was greater than 4 log CFU/g in most of the sample types, those in the two Salmonella-isolated samples of black tiger prawn were 7.48 and 5.18 log CFU/g, respectively. These results indicate the possibility that shrimp and prawns contribute to foodborne infections. The improvement of seafood quality is an important issue, and the information on contamination by pathogens should be provided as feedback to the originating country, with the aim of increasing safety.
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Affiliation(s)
- Y Asai
- Department of Microbiology, Kanagawa Prefectural Institute of Public Health, 1-3-1 Simomachiya, Chigasaki 253-0087, Japan
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Abstract
REASONS FOR PERFORMING STUDY Thoroughbred racehorses often experience interruptions to their training. Identifying the effects of these changes and how they alter athletic performance might provide an insight on to how to prevent these changes from occurring. HYPOTHESIS Training and detraining young Thoroughbreds alters their aerobic capacities with correlated changes in circulatory capacities; if horses remained spontaneously active in a pasture during their detraining period, their decreases in aerobic capacity during detraining would be reduced. METHODS We trained 6 Thoroughbred yearlings for 6 months using a conventional yearling race training programme. They were then detrained for 10 weeks with free range on pasture for 8 h/day and stall rest at night. Treadmill measurements of O2 transport variables were made before training (PRE), after training (TR) and after detraining (DT). A step-test protocol identified each horse's aerobic capacity (VO2max) and speed to attain it, and a steady-state run at VO2max was used to quantify 02 transport variables at each time period. RESULTS The mass-specific and whole-body VO2max, cardiac output (Q) and stroke volume (Vs) increased from PRE to TR. All mass-specific values decreased significantly from TR to DT; however, because body mass increased by 8.3% from TR to DT, none of the variables changed significantly from TR to DT on a whole-body basis. CONCLUSIONS Changes in aerobic capacity are highly correlated with changes in Vs and circulatory capacity during training and detraining. Exercise activity of trained young horses free at pasture for 8 h/day is sufficient to maintain VO2max, (Q and Vs during 10 weeks of DT. POTENTIAL RELEVANCE Aerobic and cardiovascular fitness may be maintained in young Thoroughbred horses during at least 10 weeks of detraining by maintaining modest spontaneous exercise activity.
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Affiliation(s)
- K Mukai
- Equine Research Institute, Japan Racing Association, 321-4 Tokami-cho, Utsunomiya-city, Tochigi Prefecture, Japan
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