1
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Iguchi Y, Fukabori R, Kato S, Takahashi K, Eifuku S, Maejima Y, Shimomura K, Mizuma H, Mawatari A, Doi H, Cui Y, Onoe H, Hikishima K, Osanai M, Nishijo T, Momiyama T, Benton R, Kobayashi K. Chemogenetic activation of mammalian brain neurons expressing insect Ionotropic Receptors by systemic ligand precursor administration. Commun Biol 2024; 7:547. [PMID: 38714803 PMCID: PMC11076466 DOI: 10.1038/s42003-024-06223-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 04/22/2024] [Indexed: 05/10/2024] Open
Abstract
Chemogenetic approaches employing ligand-gated ion channels are advantageous regarding manipulation of target neuronal population functions independently of endogenous second messenger pathways. Among them, Ionotropic Receptor (IR)-mediated neuronal activation (IRNA) allows stimulation of mammalian neurons that heterologously express members of the insect chemosensory IR repertoire in response to their cognate ligands. In the original protocol, phenylacetic acid, a ligand of the IR84a/IR8a complex, was locally injected into a brain region due to its low permeability of the blood-brain barrier. To circumvent this invasive injection, we sought to develop a strategy of peripheral administration with a precursor of phenylacetic acid, phenylacetic acid methyl ester, which is efficiently transferred into the brain and converted to the mature ligand by endogenous esterase activities. This strategy was validated by electrophysiological, biochemical, brain-imaging, and behavioral analyses, demonstrating high utility of systemic IRNA technology in the remote activation of target neurons in the brain.
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Affiliation(s)
- Yoshio Iguchi
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Ryoji Fukabori
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Shigeki Kato
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Kazumi Takahashi
- Department of Systems Neuroscience, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Satoshi Eifuku
- Department of Systems Neuroscience, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Yuko Maejima
- Department of Bioregulation and Pharmacological Medicine, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Kenju Shimomura
- Department of Bioregulation and Pharmacological Medicine, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan
| | - Hiroshi Mizuma
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan
- Department of Functional Brain Imaging, Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba, 263-8555, Japan
| | - Aya Mawatari
- Laboratory for Labeling Chemistry, RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan
| | - Hisashi Doi
- Laboratory for Labeling Chemistry, RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan
- Research, Institute for Drug Discovery Science, Collaborative Creation Research Center, Organization for Research Promotion, Osaka Metropolitan University, 1-1 Gakuen-cho, Naka-ku, Sakai, 599-8531, Japan
| | - Yilong Cui
- Laboratory for Biofunction Dynamics Imaging, RIKEN Center for Biosystems Dynamics Research, 6-7-3 Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan
| | - Hirotaka Onoe
- Human Brain Research Center, Kyoto University Graduate School of Medicine, 54 Shogoin-Kawahara-Cho, Sakyo-ku, Kyoto, 606-8507, Japan
| | - Keigo Hikishima
- Medical Devices Research Group, Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-2-1 Namiki, Tsukuba, 305-8564, Japan
| | - Makoto Osanai
- Department of Medical Physics and Engineering, Division of Health Sciences, Osaka University Graduate School of Medicine, 1-7 Yamadaoka, Suita, 565-0871, Japan
| | - Takuma Nishijo
- Department of Pharmacology, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Tokyo, 105-8461, Japan
- Department of Molecular Neurobiology, Institute for Developmental Research, Aichi Developmental Disability Center, 713-8 Kamiya-cho, Kasugai, 480-0392, Japan
| | - Toshihiko Momiyama
- Department of Pharmacology, Jikei University School of Medicine, 3-25-8 Nishi-shinbashi, Tokyo, 105-8461, Japan
| | - Richard Benton
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, CH-1015, Lausanne, Switzerland
| | - Kazuto Kobayashi
- Department of Molecular Genetics, Institute of Biomedical Sciences, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima, 960-1295, Japan.
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Ode Y, Pradipta AR, Ishiwata A, Nambu A, Ohnuki K, Mizuma H, Haba H, Tanaka K. Metallic radionuclide-labeled tetrameric 2,6-diisopropylphenyl azides for cancer treatment. Chem Commun (Camb) 2024; 60:3291-3294. [PMID: 38421438 DOI: 10.1039/d4cc00048j] [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] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
This study proposes a new method for radionuclide therapy that involves the use of oligomeric 2,6-diisopropylphenyl azides and a chelator to form stable complexes with metallic radionuclides. The technique works by taking advantage of the endogenous acrolein produced by cancer cells. The azides react with the acrolein to give a diazo derivative that immediately attaches to the nearest organelle, effectively anchoring the radionuclide within the tumor. Preliminary in vivo experiments were conducted on a human lung carcinoma xenograft model, demonstrating the feasibility of this approach for cancer treatment.
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Affiliation(s)
- Yudai Ode
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan.
| | - Ambara R Pradipta
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan.
| | - Akihiro Ishiwata
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Akihiro Nambu
- Nuclear Chemistry Group, RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Kazunobu Ohnuki
- Exploratory Oncology Research and Clinical Trial Center, National Cancer Center, 6-5-1 Kashiwanoha, Kashiwa, Chiba 277-8577, Japan
| | - Hiroshi Mizuma
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555, Japan
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Minatojima-minamimachi, Chuo-ku, Kobe, Hyogo 650-0047, Japan
| | - Hiromitsu Haba
- Nuclear Chemistry Group, RIKEN Nishina Center for Accelerator-Based Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Katsunori Tanaka
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro, Tokyo 152-8552, Japan.
- Biofunctional Synthetic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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3
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Zhang K, Mizuma H, Zhang X, Takahashi K, Jin C, Song F, Gao Y, Kanayama Y, Wu Y, Li Y, Ma L, Tian M, Zhang H, Watanabe Y. PET imaging of neural activity, β-amyloid, and tau in normal brain aging. Eur J Nucl Med Mol Imaging 2021; 48:3859-3871. [PMID: 33674892 DOI: 10.1007/s00259-021-05230-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 02/01/2021] [Indexed: 10/22/2022]
Abstract
Normal brain aging is commonly associated with neural activity alteration, β-amyloid (Aβ) deposition, and tau aggregation, driving a progressive cognitive decline in normal elderly individuals. Positron emission tomography (PET) with radiotracers targeting these age-related changes has been increasingly employed to clarify the sequence of their occurrence and the evolution of clinically cognitive deficits. Herein, we reviewed recent literature on PET-based imaging of normal human brain aging in terms of neural activity, Aβ, and tau. Neural hypoactivity reflected by decreased glucose utilization with PET imaging has been predominately reported in the frontal, cingulate, and temporal lobes of the normal aging brain. Aβ PET imaging uncovers the pathophysiological association of Aβ deposition with cognitive aging, as well as the potential mechanisms. Tau-associated cognitive changes in normal aging are likely independent of but facilitated by Aβ as indicated by tau and Aβ PET imaging. Future longitudinal studies using multi-radiotracer PET imaging combined with other neuroimaging modalities, such as magnetic resonance imaging (MRI) morphometry, functional MRI, and magnetoencephalography, are essential to elucidate the neuropathological underpinnings and interactions in normal brain aging.
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Affiliation(s)
- Kai Zhang
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, 650-0047, Japan. .,Interntional Research Fellow of Japan Society for the Promotion of Science, Tokyo, Japan.
| | - Hiroshi Mizuma
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, 650-0047, Japan.,Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Chiba, Kashiwa, 277-8583, Japan
| | - Xiaohui Zhang
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Kayo Takahashi
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, 650-0047, Japan
| | - Chentao Jin
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Fahuan Song
- Department of Nuclear Medicine, Zhejiang Province People's Hospital, Hangzhou, Zhejiang, 310014, China
| | - Yuanxue Gao
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Yousuke Kanayama
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, 650-0047, Japan.,Kavli Institute for the Physics and Mathematics of the Universe, The University of Tokyo, Chiba, Kashiwa, 277-8583, Japan
| | - Yuping Wu
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, 650-0047, Japan
| | - Yuting Li
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Lijuan Ma
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Mei Tian
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China.
| | - Hong Zhang
- Department of Nuclear Medicine and PET Center, The Second Hospital of Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China. .,Key Laboratory for Biomedical Engineering of Ministry of Education, Zhejiang University, Hangzhou, Zhejiang, 310007, China. .,The College of Biomedical Engineering and Instrument Science of Zhejiang University, Hangzhou, Zhejiang, 310007, China.
| | - Yasuyoshi Watanabe
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, 650-0047, Japan.
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Furuse T, Mizuma H, Hirose Y, Kushida T, Yamada I, Miura I, Masuya H, Funato H, Yanagisawa M, Onoe H, Wakana S. A new mouse model of GLUT1 deficiency syndrome exhibits abnormal sleep-wake patterns and alterations of glucose kinetics in the brain. Dis Model Mech 2019; 12:dmm.038828. [PMID: 31399478 PMCID: PMC6765196 DOI: 10.1242/dmm.038828] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 07/30/2019] [Indexed: 11/29/2022] Open
Abstract
Dysfunction of glucose transporter 1 (GLUT1) proteins causes infantile epilepsy, which is designated as a GLUT1 deficiency syndrome (GLUT1DS; OMIM #606777). Patients with GLUT1DS display varied clinical phenotypes, such as infantile seizures, ataxia, severe mental retardation with learning disabilities, delayed development, hypoglycorrhachia, and other varied symptoms. Glut1Rgsc200 mutant mice mutagenized with N-ethyl-N-nitrosourea (ENU) carry a missense mutation in the Glut1 gene that results in amino acid substitution at the 324th residue of the GLUT1 protein. In this study, these mutants exhibited various phenotypes, including embryonic lethality of homozygotes, a decreased cerebrospinal-fluid glucose value, deficits in contextual learning, a reduction in body size, seizure-like behavior and abnormal electroencephalogram (EEG) patterns. During EEG recording, the abnormality occurred spontaneously, whereas the seizure-like phenotypes were not observed at the same time. In sleep-wake analysis using EEG recording, heterozygotes exhibited a longer duration of wake times and shorter duration of non-rapid eye movement (NREM) sleep time. The shortened period of NREM sleep and prolonged duration of the wake period may resemble the sleep disturbances commonly observed in patients with GLUT1DS and other epilepsy disorders. Interestingly, an in vivo kinetic analysis of glucose utilization by positron emission tomography with 2-deoxy-2-[fluorine-18]fluoro-D-glucose imaging revealed that glucose transportation was reduced, whereas hexokinase activity and glucose metabolism were enhanced. These results indicate that a Glut1Rgsc200 mutant is a useful tool for elucidating the molecular mechanisms of GLUT1DS. This article has an associated First Person interview with the joint first authors of the paper. Summary: New phenotypes are revealed by a GLUT1 deficiency mutant mouse model carrying a missense mutation in Glut1.
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Affiliation(s)
- Tamio Furuse
- Japan Mouse Clinic, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Hiroshi Mizuma
- Laboratory for Pathophysiological and Health Science, RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo 650-0047, Japan
| | - Yuuki Hirose
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Ibaraki 305-8575, Japan
| | - Tomoko Kushida
- Japan Mouse Clinic, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Ikuko Yamada
- Japan Mouse Clinic, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Ikuo Miura
- Japan Mouse Clinic, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Hiroshi Masuya
- Resource Advancement Unit, Integrated Bioresource Information Division, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
| | - Hiromasa Funato
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Ibaraki 305-8575, Japan.,Department of Anatomy, School of Medicine, Faculty of Medicine, Toho University, Tokyo 143-8540, Japan
| | - Masashi Yanagisawa
- International Institute for Integrative Sleep Medicine (WPI-IIIS), University of Tsukuba, Ibaraki 305-8575, Japan.,Life Science Center for Survival Dynamics (TARA), University of Tsukuba, Ibaraki 305-8575, Japan.,Department of Molecular Genetics, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
| | - Hirotaka Onoe
- Human Brain Research Center, Kyoto University Graduate School of Medicine, Kyoto 606-8501, Japan
| | - Shigeharu Wakana
- Japan Mouse Clinic, RIKEN BioResource Research Center, Tsukuba, Ibaraki 305-0074, Japan
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5
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Kikuchi T, Morizane A, Doi D, Magotani H, Onoe H, Hayashi T, Mizuma H, Takara S, Takahashi R, Inoue H, Morita S, Yamamoto M, Okita K, Nakagawa M, Parmar M, Takahashi J. Human iPS cell-derived dopaminergic neurons function in a primate Parkinson's disease model. Nature 2018; 548:592-596. [PMID: 28858313 DOI: 10.1038/nature23664] [Citation(s) in RCA: 423] [Impact Index Per Article: 70.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 07/19/2017] [Indexed: 02/08/2023]
Abstract
Induced pluripotent stem cells (iPS cells) are a promising source for a cell-based therapy to treat Parkinson's disease (PD), in which midbrain dopaminergic neurons progressively degenerate. However, long-term analysis of human iPS cell-derived dopaminergic neurons in primate PD models has never been performed to our knowledge. Here we show that human iPS cell-derived dopaminergic progenitor cells survived and functioned as midbrain dopaminergic neurons in a primate model of PD (Macaca fascicularis) treated with the neurotoxin MPTP. Score-based and video-recording analyses revealed an increase in spontaneous movement of the monkeys after transplantation. Histological studies showed that the mature dopaminergic neurons extended dense neurites into the host striatum; this effect was consistent regardless of whether the cells were derived from patients with PD or from healthy individuals. Cells sorted by the floor plate marker CORIN did not form any tumours in the brains for at least two years. Finally, magnetic resonance imaging and positron emission tomography were used to monitor the survival, expansion and function of the grafted cells as well as the immune response in the host brain. Thus, this preclinical study using a primate model indicates that human iPS cell-derived dopaminergic progenitors are clinically applicable for the treatment of patients with PD.
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Affiliation(s)
- Tetsuhiro Kikuchi
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Asuka Morizane
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Daisuke Doi
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Hiroaki Magotani
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Hirotaka Onoe
- Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe 650-0047, Japan
| | - Takuya Hayashi
- Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe 650-0047, Japan
| | - Hiroshi Mizuma
- Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe 650-0047, Japan
| | - Sayuki Takara
- Division of Bio-Function Dynamics Imaging, RIKEN Center for Life Science Technologies, Kobe 650-0047, Japan
| | - Ryosuke Takahashi
- Department of Neurology, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Haruhisa Inoue
- Department of Cell Growth and Differentiation, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Satoshi Morita
- Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Michio Yamamoto
- Department of Biomedical Statistics and Bioinformatics, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Keisuke Okita
- Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Masato Nakagawa
- Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan
| | - Malin Parmar
- Wallenberg Neuroscience Center and Lund Stem Cell Center, Lund University, 22184 Lund, Sweden
| | - Jun Takahashi
- Department of Clinical Application, Center for iPS Cell Research and Application, Kyoto University, Kyoto 606-8507, Japan.,Department of Neurosurgery, Clinical Neuroscience, Graduate School of Medicine, Kyoto University, Kyoto 606-8507, Japan
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6
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Hara Y, Motoi Y, Hikishima K, Mizuma H, Onoe H, Matsumoto SE, Elahi M, Okano H, Aoki S, Hattori N. Involvement of the Septo-Hippocampal Cholinergic Pathway in Association with Septal Acetylcholinesterase Upregulation in a Mouse Model of Tauopathy. Curr Alzheimer Res 2017; 14:94-103. [PMID: 27335039 DOI: 10.2174/1567205013666160602235800] [Citation(s) in RCA: 11] [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] [Received: 01/12/2016] [Revised: 05/10/2016] [Accepted: 05/23/2016] [Indexed: 11/22/2022]
Abstract
BACKGROUND Cholinergic cell loss in the basal forebrain, the major source of hippocampal cholinergic projections, has been implicated in Alzheimer's disease. OBJECTIVE To examine whether the septohippocampal pathway is involved in tauopathy model mice and to elucidate the tau-associated mechanism underlying cholinergic alteration. METHODS Adult (6 to 8 months old) and old (16 to 18 months old) transgenic mice expressing wild-type human tau, Tg601, were examined using Ex vivo diffusion tensor magnetic resonance imaging (DTI) and 2-[18F]fluoro- 2-deoxy-D-glucose positron emission tomography (FDG-PET). Choline acetyltransferase (ChAT)-positive neurons in the medial septum (MS) were counted by stereological methods. Acetylcholinesterase (AChE) activity and AChE mRNA in 6 brain regions were measured. RESULTS Ex vivo DTI revealed that the number of fractional anisotropy (FA) streamlines in the septohippocampal tract decreased with age in Tg601 mice. The FA value in the septum was lower in old Tg601 mice than in non-tg mice. A voxel-based statistical analysis of FDG-PET revealed the presence of low glucose uptake areas, involving the MS in adults, and spread over regions including the hippocampal dentate gyrus in old mice. In the MS, the number of choline acetyltransferase (ChAT)-positive neurons decreased in old Tg601 mice. AChE activity and AChE mRNA T transcripts were exclusively higher in the septum. CONCLUSION The upregulation of AChE in the septum may result in the selective degeneration of the septohippocampal cholinergic pathway in the tauopathy mouse model.
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Affiliation(s)
| | - Yumiko Motoi
- Department of Diagnosis, Prevention and Treatment of Dementia, P.O. 2-1-1 Hongo, Bunkyo-ku Tokyo, Japan
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7
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Nakai N, Nagano M, Saitow F, Watanabe Y, Kawamura Y, Kawamoto A, Tamada K, Mizuma H, Onoe H, Watanabe Y, Monai H, Hirase H, Nakatani J, Inagaki H, Kawada T, Miyazaki T, Watanabe M, Sato Y, Okabe S, Kitamura K, Kano M, Hashimoto K, Suzuki H, Takumi T. Serotonin rebalances cortical tuning and behavior linked to autism symptoms in 15q11-13 CNV mice. Sci Adv 2017; 3:e1603001. [PMID: 28691086 PMCID: PMC5479676 DOI: 10.1126/sciadv.1603001] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 04/26/2017] [Indexed: 05/21/2023]
Abstract
Serotonin is a critical modulator of cortical function, and its metabolism is defective in autism spectrum disorder (ASD) brain. How serotonin metabolism regulates cortical physiology and contributes to the pathological and behavioral symptoms of ASD remains unknown. We show that normal serotonin levels are essential for the maintenance of neocortical excitation/inhibition balance, correct sensory stimulus tuning, and social behavior. Conversely, low serotonin levels in 15q dup mice (a model for ASD with the human 15q11-13 duplication) result in impairment of the same phenotypes. Restoration of normal serotonin levels in 15q dup mice revealed the reversibility of a subset of ASD-related symptoms in the adult. These findings suggest that serotonin may have therapeutic potential for discrete ASD symptoms.
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Affiliation(s)
- Nobuhiro Nakai
- RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
- Graduate School of Biostudies, Kyoto University, Sakyo, Kyoto 606-8501, Japan
| | - Masatoshi Nagano
- Graduate School of Medicine, Nippon Medical School, Bunkyo, Tokyo 113-8602, Japan
| | - Fumihito Saitow
- Graduate School of Medicine, Nippon Medical School, Bunkyo, Tokyo 113-8602, Japan
| | - Yasuhito Watanabe
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
- Department of Clinical Neurobiology, University Hospital and German Cancer Research Center, Heidelberg 69120, Germany
- Corresponding author. (T.T.); (H.S.); (Yasuhito Watanabe)
| | - Yoshinobu Kawamura
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
| | - Akiko Kawamoto
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
| | - Kota Tamada
- RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
| | - Hiroshi Mizuma
- RIKEN Center for Life Science Technologies, Chuo, Kobe 650-0047, Japan
| | - Hirotaka Onoe
- RIKEN Center for Life Science Technologies, Chuo, Kobe 650-0047, Japan
| | | | - Hiromu Monai
- RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
| | - Hajime Hirase
- RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
| | - Jin Nakatani
- Shiga University of Medical Science, Otsu, Shiga 520-2192, Japan
| | - Hirofumi Inagaki
- Graduate School of Medicine, Nippon Medical School, Bunkyo, Tokyo 113-8602, Japan
| | - Tomoyuki Kawada
- Graduate School of Medicine, Nippon Medical School, Bunkyo, Tokyo 113-8602, Japan
| | - Taisuke Miyazaki
- Department of Anatomy and Embryology, Hokkaido University Graduate School of Medicine, Kita, Sapporo 060-8638, Japan
| | - Masahiko Watanabe
- Department of Anatomy and Embryology, Hokkaido University Graduate School of Medicine, Kita, Sapporo 060-8638, Japan
| | - Yuka Sato
- Graduate School of Medicine, University of Tokyo, Bunkyo, Tokyo 113-8654, Japan
| | - Shigeo Okabe
- Graduate School of Medicine, University of Tokyo, Bunkyo, Tokyo 113-8654, Japan
| | - Kazuo Kitamura
- Graduate School of Medicine, University of Tokyo, Bunkyo, Tokyo 113-8654, Japan
| | - Masanobu Kano
- Graduate School of Medicine, University of Tokyo, Bunkyo, Tokyo 113-8654, Japan
| | - Kouichi Hashimoto
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
| | - Hidenori Suzuki
- Graduate School of Medicine, Nippon Medical School, Bunkyo, Tokyo 113-8602, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo, Japan
- Corresponding author. (T.T.); (H.S.); (Yasuhito Watanabe)
| | - Toru Takumi
- RIKEN Brain Science Institute, Wako, Saitama 351-0198, Japan
- Graduate School of Biomedical Sciences, Hiroshima University, Minami, Hiroshima 734-8553, Japan
- Core Research for Evolutional Science and Technology (CREST), Japan Science and Technology Agency, Tokyo, Japan
- Corresponding author. (T.T.); (H.S.); (Yasuhito Watanabe)
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Yamauchi H, Kagawa S, Kishibe Y, Takahashi M, Nishii R, Mizuma H, Takahashi K, Onoe H, Higashi T. Increase in [18F]-Fluoroacetate Uptake in Patients With Chronic Hemodynamic Cerebral Ischemia. Stroke 2015; 46:2669-72. [DOI: 10.1161/strokeaha.115.010080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/02/2015] [Indexed: 11/16/2022]
Abstract
Background and Purpose—
[18F]-fluoroacetate (
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F-FACE) can be used for evaluating glial cell metabolism. Experimental studies have shown an increase in
18
F-FACE uptake in rodent models of cerebral ischemia. The aim of this study was to determine whether
18
F-FACE uptake is increased in the noninfarcted cerebral cortex in patients with hemodynamic ischemia owing to atherosclerotic internal carotid artery or middle cerebral artery disease.
Methods—
We evaluated 9 symptomatic patients with unilateral atherosclerotic internal carotid artery or middle cerebral artery disease and no cortical infarction using positron emission tomography with
18
F-FACE and
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O-gases.
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F-FACE uptake during 40 to 60 minutes after injection was compared with the cerebral blood flow, cerebral metabolic rate of oxygen, oxygen extraction fraction, and cerebral blood volume in the middle cerebral artery distributions.
Results—
Significant decreases of cerebral blood flow and cerebral metabolic rate of oxygen and increases of oxygen extraction fraction and cerebral blood volume were found in the hemisphere ipsilateral to the arterial lesion, and
18
F-FACE uptake in this region was greater than that in the contralateral hemisphere. The relative
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F-FACE uptake (ipsilateral/contralateral ratio) was negatively correlated with cerebral blood flow or cerebral metabolic rate of oxygen values and was positively correlated with oxygen extraction fraction values. Multivariate analysis showed that the ipsilateral/contralateral
18
F-FACE uptake ratio was independently correlated with the cerebral blood flow (or oxygen extraction fraction) and cerebral metabolic rate of oxygen values.
Conclusions—
In patients with atherosclerotic internal carotid artery or middle cerebral artery disease,
18
F-FACE uptake is increased in the noninfarcted cerebral cortex with chronic hemodynamic ischemia characterized by misery perfusion with decreased oxygen metabolism. Increased
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F-FACE uptake may indicate the cortical regions that are at particular risk for ischemic damage.
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Affiliation(s)
- Hiroshi Yamauchi
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Shinya Kagawa
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Yoshihiko Kishibe
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Masaaki Takahashi
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Ryuichi Nishii
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Hiroshi Mizuma
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Kazuhiro Takahashi
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Hirotaka Onoe
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
| | - Tatsuya Higashi
- From the Division of PET Imaging, Shiga Medical Centre Research Institute, Moriyama, Japan (H.Y., S.K., Y.K., M.T., T.H.); Department of Radiology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan (R.N.); and Bio-Function Imaging Team (H.M., H.O.) and Clinical Application Unit (K.T.), RIKEN Center for Life Science Technologies, Kobe, Japan
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9
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Goto M, Mizuma H, Wada Y, Suzuki M, Watanabe Y, Onoe H, Doi H. <sup>11</sup>C-Labeled Capsaicin and Its <i>in Vivo</i> Molecular Imaging in Rats by Positron Emission Tomography. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/fns.2015.62022] [Citation(s) in RCA: 3] [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: 11/20/2022]
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10
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Takano H, Hasegawa H, Narumi H, Shindo S, Mizuma H, Kuwabara Y, Kobayashi Y, Komuro I. Retraction: Effects of valsartan and amlodipine on home blood pressure and cardiovascular events in Japanese hypertensive patients: a subanalysis of the VART. J Hum Hypertens 2014; 29:337. [PMID: 25296718 DOI: 10.1038/jhh.2014.90] [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: 11/09/2022]
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11
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Yamanaka H, Yokoyama C, Mizuma H, Kurai S, Finnema SJ, Halldin C, Doi H, Onoe H. A possible mechanism of the nucleus accumbens and ventral pallidum 5-HT1B receptors underlying the antidepressant action of ketamine: a PET study with macaques. Transl Psychiatry 2014; 4:e342. [PMID: 24399045 PMCID: PMC3905222 DOI: 10.1038/tp.2013.112] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [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: 10/15/2013] [Accepted: 10/29/2013] [Indexed: 12/19/2022] Open
Abstract
Ketamine is a unique anesthetic reagent known to produce various psychotic symptoms. Ketamine has recently been reported to elicit a long-lasting antidepressant effect in patients with major depression. Although recent studies provide insight into the molecular mechanisms of the effects of ketamine, the antidepressant mechanism has not been fully elucidated. To understand the involvement of the brain serotonergic system in the actions of ketamine, we performed a positron emission tomography (PET) study on non-human primates. Four rhesus monkeys underwent PET studies with two serotonin (5-HT)-related PET radioligands, [(11)C]AZ10419369 and [(11)C]DASB, which are highly selective for the 5-HT1B receptor and serotonin transporter (SERT), respectively. Voxel-based analysis using standardized brain images revealed that ketamine administration significantly increased 5-HT1B receptor binding in the nucleus accumbens and ventral pallidum, whereas it significantly reduced SERT binding in these brain regions. Fenfluramine, a 5-HT releaser, significantly decreased 5-HT1B receptor binding, but no additional effect was observed when it was administered with ketamine. Furthermore, pretreatment with 2,3-dihydroxy-6-nitro-7-sulfamoylbenzo(f)quinoxaline (NBQX), a potent antagonist of the glutamate α-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA) receptor, blocked the action of ketamine on the 5-HT1B receptor but not SERT binding. This indicates the involvement of AMPA receptor activation in ketamine-induced alterations of 5-HT1B receptor binding. Because NBQX is known to block the antidepressant effect of ketamine in rodents, alterations in the serotonergic neurotransmission, particularly upregulation of postsynaptic 5-HT1B receptors in the nucleus accumbens and ventral pallidum may be critically involved in the antidepressant action of ketamine.
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Affiliation(s)
- H Yamanaka
- Bio-Function Imaging Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Japan
| | - C Yokoyama
- Bio-Function Imaging Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Japan
| | - H Mizuma
- Bio-Function Imaging Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Japan
| | - S Kurai
- Labelling Chemistry Team, Division of Bio-function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Japan
| | - S J Finnema
- Karolinska Institutet, Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska University Hospital, Stockholm, Sweden
| | - C Halldin
- Karolinska Institutet, Department of Clinical Neuroscience, Center for Psychiatric Research, Karolinska University Hospital, Stockholm, Sweden
| | - H Doi
- Labelling Chemistry Team, Division of Bio-function Dynamics Imaging, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Japan
| | - H Onoe
- Bio-Function Imaging Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe, Japan,Bio-Function Imaging Team, RIKEN Center for Life Science Technologies, 6-7-3 Minatojima-Minamimachi, Chuo-ku, Kobe 650-0047, Japan. E-mail:
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12
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Takano H, Hasegawa H, Narumi H, Shindo S, Mizuma H, Kuwabara Y, Kobayashi Y, Komuro I. Erratum: Effects of valsartan and amlodipine on home blood pressure and cardiovascular events in Japanese hypertensive patients: a subanalysis of the VART. J Hum Hypertens 2013. [DOI: 10.1038/jhh.2013.58] [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: 11/09/2022]
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13
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Kubota A, Takano H, Mizuma H, Kuwabara Y, Sato Y, Kotooka N, Inoue T, Node K, Komuro I, Kobayashi Y. Effects of pitavastatin on Japanese patients with chronic heart failure: a subanalysis of the PEARL. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Asaka M, Kotooka N, Mizuma H, Sato Y, Fujimatsu D, Kuwabara Y, Takano H, Inoue T, Komuro I, Node K. High-sensitivity assay of plasma cardiac troponin T predicts the effects of pitavastatin in patients with chronic heart failure: a sub-group analysis from the pitavastatin heart failure study (PEARL). Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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15
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Sakuma M, Kotooka N, Mizuma H, Kuwabara Y, Sato Y, Fujimatsu D, Takano H, Inoue T, Komuro I, Node K. Effectiveness of therapy with pitavastatin is associated with plasma interleukin-8 levels and improved cardiovascular outcomes in patients with chronic heart failure. Eur Heart J 2013. [DOI: 10.1093/eurheartj/eht309.p3298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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16
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Miyazaki S, Minami T, Mizuma H, Kanazawa M, Doi H, Matsumura S, Lu J, Onoe H, Furuta K, Suzuki M, Ito S. The action site of the synthetic kainoid (2S,3R,4R)-3-carboxymethyl-4-(4-methylphenylthio)pyrrolidine-2-carboxylic acid (PSPA-4), an analogue of Japanese mushroom poison acromelic acid, for allodynia (tactile pain). Eur J Pharmacol 2013; 710:120-7. [DOI: 10.1016/j.ejphar.2012.10.023] [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] [Received: 02/25/2012] [Revised: 09/29/2012] [Accepted: 10/13/2012] [Indexed: 02/05/2023]
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17
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Takano H, Mizuma H, Kuwabara Y, Sato Y, Shindo S, Kotooka N, Fujimatsu D, Kobayashi Y, Inoue T, Node K, Komuro I. Effects of Pitavastatin in Japanese Patients With Chronic Heart Failure. Circ J 2013; 77:917-25. [DOI: 10.1253/circj.cj-12-1062] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hiroyuki Takano
- Department of Molecular Cardiovascular Pharmacology, Graduate School of Pharmaceutical Sciences, Chiba University
| | - Hiroshi Mizuma
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine
| | - Yoichi Kuwabara
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine
| | | | - Satoshi Shindo
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine
| | | | | | - Yoshio Kobayashi
- Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine
| | - Teruo Inoue
- Department of Cardiovascular Medicine, Dokkyo Medical University
| | - Koichi Node
- Department of Cardiovascular Medicine, Saga University
| | - Issei Komuro
- Department of Cardiovascular Medicine, The University of Tokyo Graduate School of Medicine
- Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine
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18
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Yeh HH, Tian M, Hinz R, Young D, Shavrin A, Mukhapadhyay U, Flores LG, Balatoni J, Soghomonyan S, Jeong HJ, Pal A, Uthamanthil R, Jackson JN, Nishii R, Mizuma H, Onoe H, Kagawa S, Higashi T, Fukumitsu N, Alauddin M, Tong W, Herholz K, Gelovani JG. Imaging epigenetic regulation by histone deacetylases in the brain using PET/MRI with ¹⁸F-FAHA. Neuroimage 2012; 64:630-9. [PMID: 22995777 DOI: 10.1016/j.neuroimage.2012.09.019] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 08/31/2012] [Accepted: 09/05/2012] [Indexed: 01/12/2023] Open
Abstract
Epigenetic modifications mediated by histone deacetylases (HDACs) play important roles in the mechanisms of different neurologic diseases and HDAC inhibitors (HDACIs) have shown promise in therapy. However, pharmacodynamic profiles of many HDACIs in the brain remain largely unknown due to the lack of validated methods for noninvasive imaging of HDAC expression-activity. In this study, dynamic PET/CT imaging was performed in 4 rhesus macaques using [(18)F]FAHA, a novel HDAC substrate, and [(18)F]fluoroacetate, the major radio-metabolite of [(18)F]FAHA, and fused with corresponding MR images of the brain. Quantification of [(18)F]FAHA accumulation in the brain was performed using a customized dual-tracer pharmacokinetic model. Immunohistochemical analyses of brain tissue revealed the heterogeneity of expression of individual HDACs in different brain structures and cell types and confirmed that PET/CT/MRI with [(18)F]FAHA reflects the level of expression-activity of HDAC class IIa enzymes. Furthermore, PET/CT/MRI with [(18)F]FAHA enabled non-invasive, quantitative assessment of pharmacodynamics of HDAC inhibitor SAHA in the brain.
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Affiliation(s)
- Hsin-Hsien Yeh
- Department of Experimental Diagnostic Imaging, University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA
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19
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Asakawa T, Sugiyama K, Akamine S, Yokoyama C, Shukuri M, Mizuma H, Tsukada H, Onoe H, Namba H. The food reaching test: a sensitive test of behavioral improvements by deep brain stimulation in MPTP-treated monkey. Neurosci Res 2012; 74:122-8. [PMID: 22850123 DOI: 10.1016/j.neures.2012.07.006] [Citation(s) in RCA: 4] [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] [Received: 03/15/2012] [Revised: 06/25/2012] [Accepted: 07/10/2012] [Indexed: 10/28/2022]
Abstract
We modified an objective behavioral test, namely the food reaching test (FRT), for quantitative assessment of motor performance improved by deep brain stimulation (DBS) of the subthalamic nucleus (STN) in the Parkinsonian monkeys. The symptomatic features and their severity in 3 monkeys treated with 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) were evaluated with a subjective monkey Parkinson's disease rating scale (PDRS). We then performed STN-DBS with the minimum current intensity that stopped the tremor. The time required for the monkeys to pick up all 5 pieces of potato (FRT time) was measured as a major index to evaluate bradykinesia. The success rate was adopted as another index for assessing overall motor impairments. Although both FRT time and PDRS score were similarly improved by STN-DBS, change of FRT time appeared more sensitive than that of PDRS scores. FRT is an easily trained behavioral test with high objectivity and sensitivity that can be applied for assessing motor performance in MPTP-treated monkeys during experiments in a restrained condition such as functional imaging of the brain.
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Affiliation(s)
- Tetsuya Asakawa
- Department of Neurosurgery, Hamamatsu University School of Medicine, 1-20-1 Handayama, Higashi-ku, Hamamatsu 431-3192, Japan
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20
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Takano H, Hasegawa H, Narumi H, Shindo S, Mizuma H, Kuwabara Y, Kobayashi Y, Komuro I. Effects of valsartan and amlodipine on home blood pressure and cardiovascular events in Japanese hypertensive patients: a subanalysis of the VART. J Hum Hypertens 2011; 26:656-63. [DOI: 10.1038/jhh.2011.91] [Citation(s) in RCA: 4] [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: 01/13/2023]
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21
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Takashima T, Yokoyama C, Mizuma H, Yamanaka H, Wada Y, Onoe K, Nagata H, Tazawa S, Doi H, Takahashi K, Morita M, Kanai M, Shibasaki M, Kusuhara H, Sugiyama Y, Onoe H, Watanabe Y. Developmental Changes in P-Glycoprotein Function in the Blood–Brain Barrier of Nonhuman Primates: PET Study with R-11C-Verapamil and 11C-Oseltamivir. J Nucl Med 2011; 52:950-7. [DOI: 10.2967/jnumed.110.083949] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
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22
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Narumi H, Takano H, Shindo S, Fujita M, Mizuma H, Kuwabara Y, Komuro I. Erratum: Effects of valsartan and amlodipine on cardiorenal protection in Japanese hypertensive patients: the Valsartan Amlodipine Randomized Trial. Hypertens Res 2011. [DOI: 10.1038/hr.2010.219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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23
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Mizuma H, Inoue T, Takano H, Shindo S, Oka T, Fujimatsu D, Kuwabara Y, Node K, Komuro I. Rationale and design of a study to evaluate effects of pitavastatin on Japanese patients with chronic heart failure: the pitavastatin heart failure study (PEARL study). Int J Cardiol 2010; 156:144-7. [PMID: 21075465 DOI: 10.1016/j.ijcard.2010.10.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Revised: 10/02/2010] [Accepted: 10/23/2010] [Indexed: 12/31/2022]
Abstract
BACKGROUND HMG-CoA reductase inhibitors (statins) are known to have pleiotropic effects in addition to their lipid-lowering effect. Many studies have suggested cardioprotective effects of statins, however, recent large-scale clinical trials using rosuvastatin, a hydrophilic statin, have failed to show beneficial effects on cardiovascular events in patients with severe heart failure. We have designed the study to evaluate the effects of pitavastatin, a lipophilic statin, on Japanese patients with mild to moderate heart failure. METHODS AND RESULTS Five hundred seventy-seven patients with chronic heart failure were enrolled. We used a prospective, randomized, open-label, and blinded-endpoint evaluation (PROBE) design. Patients aged 20-79 years old with symptomatic (NYHA functional class II or III) heart failure and a left ventricular ejection fraction of ≤ 45% were randomly allocated to either receive pitavastatin (2mg/day) or not in addition to conventional therapy for heart failure by using the minimization method. Follow-up will be continued until March 2011. The primary endpoint is a composite of cardiac death and hospitalization for worsening heart failure. CONCLUSIONS The PEARL study will provide important data on the role of pitavastatin in the treatment of Japanese patients with mildly symptomatic heart failure (UMIN-ID: UMINC000000428).
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Affiliation(s)
- Hiroshi Mizuma
- Department of Cardiovascular Science and Medicine, Chiba University Graduate School of Medicine, Chiba, Japan
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24
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25
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Nozaki S, Mizuma H, Tanaka M, Jin G, Tahara T, Mizuno K, Yamato M, Okuyama K, Eguchi A, Akimoto K, Kitayoshi T, Mochizuki-Oda N, Kataoka Y, Watanabe Y. Thiamine tetrahydrofurfuryl disulfide improves energy metabolism and physical performance during physical-fatigue loading in rats. Nutr Res 2010; 29:867-72. [PMID: 19963160 DOI: 10.1016/j.nutres.2009.10.007] [Citation(s) in RCA: 22] [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] [Received: 08/26/2009] [Revised: 10/03/2009] [Accepted: 10/12/2009] [Indexed: 11/27/2022]
Abstract
Impaired energy metabolism is considered a possible cause of fatigue. The thiamine derivative, thiamine tetrahydrofurfuryl disulfide (TTFD), is prescribed and is also an over-the-counter drug for the attenuation of fatigue. It is readily absorbed from the intestinal tract and converted into thiamine pyrophosphate (TPP), which plays an important role as a cofactor for enzymes of metabolic pathways involved in the production of adenosine triphosphate (ATP). We postulated that TTFD has an anti-fatigue effect by improving energy metabolism during physical-fatigue loading. Here, we initially used the forced swimming test to determine whether daily TTFD or thiamine for 5 days has anti-fatigue effects on weight-loaded rats. The swimming duration of TTFD-, but not of thiamine-treated rats, was significantly longer than that of control rats (P < .05). Based on these findings, we examined changes in the levels of thiamine and its phosphate esters in various organs and the effect of TTFD on ATP levels in skeletal muscle after forced swimming, to determine the cellular mechanisms of the anti-fatigue effect of TTFD. Daily TTFD resulted in a characteristic distribution of thiamine and its phosphate esters in rat skeletal muscle, liver, kidney, heart, brain, and plasma. Furthermore, daily TTFD attenuated the decrease in ATP content in the skeletal muscle caused by forced swimming with a weight load for a defined period (150 s). These results indicate that TTFD exerts anti-fatigue effects by improving energy metabolism during physical fatigue.
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Affiliation(s)
- Satoshi Nozaki
- Department of Physiology, Osaka City University Graduate School of Medicine, Osaka 545-8585, Japan
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26
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Jin G, Kataoka Y, Tanaka M, Mizuma H, Nozaki S, Tahara T, Mizuno K, Yamato M, Watanabe Y. Changes in plasma and tissue amino acid levels in an animal model of complex fatigue. Nutrition 2009; 25:597-607. [DOI: 10.1016/j.nut.2008.11.021] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Revised: 10/14/2008] [Accepted: 11/05/2008] [Indexed: 10/21/2022]
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27
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Mizuma H, Tanaka M, Nozaki S, Mizuno K, Tahara T, Ataka S, Sugino T, Shirai T, Kajimoto Y, Kuratsune H, Kajimoto O, Watanabe Y. Daily oral administration of crocetin attenuates physical fatigue in human subjects. Nutr Res 2009; 29:145-50. [DOI: 10.1016/j.nutres.2009.02.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2008] [Revised: 02/16/2009] [Accepted: 02/16/2009] [Indexed: 11/17/2022]
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28
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Yamato M, Kataoka Y, Mizuma H, Wada Y, Watanabe Y. PET and macro- and microautoradiographic studies combined with immunohistochemistry for monitoring rat intestinal ulceration and healing processes. J Nucl Med 2009; 50:266-73. [PMID: 19164236 DOI: 10.2967/jnumed.108.057943] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
UNLABELLED 18F-FDG PET is used mainly in clinical settings for imaging focal cancer sites, but the usefulness of the modality in imaging gastrointestinal ulcers has not been established. We investigated whether PET can be used for noninvasive monitoring of indomethacin-induced small-intestine ulceration. METHODS Intestinal ulcers were induced in rats by subcutaneous administration of indomethacin. An 18F-FDG PET scan was obtained at 1, 2, and 7 d after indomethacin administration. 18F-FDG uptake in the small intestine was quantified by gamma-counting, and macro- and microautoradiographic studies were performed to determine the site of 18F-FDG uptake in tissue and at the cellular level. RESULTS Ulcers observed in the intestine (mainly in the ileum) 1-4 d after indomethacin administration were most severe at 1 d after administration and were almost healed at day 7. The PET study showed increased 18F-FDG uptake in the intestine correlating to the severity of ulceration, returning to the basal level on day 7. Ex vivo imaging and gamma-counting showed that these regions of high uptake corresponded to regions of ulceration. A microautoradiographic study combined with immunohistochemistry revealed heavy accumulation of 18F-FDG in inflammatory cells containing peroxidase on day 1 and in cells forming granulation tissue (alpha-smooth muscle actin-positive myofibroblasts and ED2-positive macrophages) on days 2-4 in and around ulcers. Proliferating (Ki67-immunopositive) intestinal crypt cells were also densely labeled with 18F-FDG in intact intestinal tissue taken from the indomethacin-treated and the control animals. CONCLUSION Our experimental data suggest that 18F-FDG PET may be useful for evaluating the occurrence of small-intestine ulcers. Ulceration could be visualized early by the prominent uptake of 18F-FDG by inflammatory cells and by the formation of granulation tissue by cells in and around ulcers.
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Affiliation(s)
- Masanori Yamato
- Department of Physiology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Mizuma H, Shukuri M, Furuse T, Takeda C, Tokuda K, Wakana S, Onoe H. PET imaging of glucose transporter function in GLUT1 deficient syndrome model mouse. Neurosci Res 2009. [DOI: 10.1016/j.neures.2009.09.1433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Takano H, Inoue T, Mizuma H, Shindo S, Narumi H, Fujimatsu D, Kuwabara Y, Node K, Komuro I. Effects of Statin Treatment in Japanese Patients with Heart Failure (PEARL Study): Rationale and Study Design. J Card Fail 2008. [DOI: 10.1016/j.cardfail.2008.07.020] [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: 10/21/2022]
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31
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Mizuno K, Tanaka M, Nozaki S, Mizuma H, Ataka S, Tahara T, Sugino T, Shirai T, Kajimoto Y, Kuratsune H, Kajimoto O, Watanabe Y. Antifatigue effects of coenzyme Q10 during physical fatigue. Nutrition 2008; 24:293-9. [DOI: 10.1016/j.nut.2007.12.007] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2007] [Revised: 11/02/2007] [Accepted: 12/11/2007] [Indexed: 10/22/2022]
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32
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Ataka S, Tanaka M, Nozaki S, Mizuma H, Mizuno K, Tahara T, Sugino T, Shirai T, Kajimoto Y, Kuratsune H, Kajimoto O, Watanabe Y. Effects of oral administration of caffeine and D-ribose on mental fatigue. Nutrition 2008; 24:233-8. [PMID: 18178380 DOI: 10.1016/j.nut.2007.12.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2007] [Revised: 11/05/2007] [Accepted: 12/04/2007] [Indexed: 11/16/2022]
Affiliation(s)
- Suzuka Ataka
- Department of Physiology, Osaka City University Graduate School of Medicine, Osaka, Japan.
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Tanaka K, Masuyama T, Hasegawa K, Tahara T, Mizuma H, Wada Y, Watanabe Y, Fukase K. A Submicrogram-Scale Protocol for Biomolecule-Based PET Imaging by Rapid 6π-Azaelectrocyclization: Visualization of Sialic Acid Dependent Circulatory Residence of Glycoproteins. Angew Chem Int Ed Engl 2008; 47:102-5. [DOI: 10.1002/anie.200702989] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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34
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Tanaka K, Masuyama T, Hasegawa K, Tahara T, Mizuma H, Wada Y, Watanabe Y, Fukase K. A Submicrogram-Scale Protocol for Biomolecule-Based PET Imaging by Rapid 6π-Azaelectrocyclization: Visualization of Sialic Acid Dependent Circulatory Residence of Glycoproteins. Angew Chem Int Ed Engl 2008. [DOI: 10.1002/ange.200702989] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Ataka S, Tanaka M, Nozaki S, Mizuma H, Mizuno K, Tahara T, Sugino T, Shirai T, Kajimoto Y, Kuratsune H, Kajimoto O, Watanabe Y. Effects of Applephenon® and ascorbic acid on physical fatigue. Nutrition 2007; 23:419-23. [PMID: 17483009 DOI: 10.1016/j.nut.2007.03.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2006] [Revised: 03/15/2007] [Accepted: 03/15/2007] [Indexed: 11/25/2022]
Abstract
OBJECTIVE We examined the effects of Applephenon and ascorbic acid administration on physical fatigue. METHODS In a double-blinded, placebo-controlled, three-way crossover design, 18 healthy volunteers were randomized to oral Applephenon (1200 mg/d), ascorbic acid (1000 mg/d), or placebo for 8 d. The fatigue-inducing physical task consisted of workload trials on a bicycle ergometer at fixed workloads for 2 h on two occasions. During the test, subjects performed non-workload trials with maximum velocity for 10 s at 30 min (30-min trial) after the start of the test and 30 min before the end of the test (210-min trial). RESULTS The change in maximum velocity between the 30- and 210-min trials was higher in the group given Applephenon than in the group given placebo; ascorbic acid had no effect. CONCLUSION These results suggest that Applephenon attenuates physical fatigue, whereas ascorbic acid does not.
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Affiliation(s)
- Suzuka Ataka
- Department of Physiology, Osaka City University Graduate School of Medicine, Osaka, Japan
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36
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Mizuno K, Tanaka M, Nozaki S, Yamaguti K, Mizuma H, Sasabe T, Sugino T, Shirai T, Kataoka Y, Kajimoto Y, Kuratsune H, Kajimoto O, Watanabe Y. Mental fatigue-induced decrease in levels of several plasma amino acids. J Neural Transm (Vienna) 2006; 114:555-61. [PMID: 17160370 DOI: 10.1007/s00702-006-0608-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2005] [Accepted: 11/05/2006] [Indexed: 10/23/2022]
Abstract
To investigate the relation between plasma amino acid levels and mental fatigue, we measured the plasma concentrations of 20 amino acids in 9 healthy volunteers before and after a fatigue-inducing mental task session for 8 hr. As fatigue-inducing mental tasks, the subjects performed an advanced trail making test, a Japanese KANA pick up test, and a mirror drawing test. As a control, 8-hr relaxation session was performed in the same subjects at an interval of 4 weeks. Immediately after the fatigue session, the plasma levels of branched-chain amino acids, tyrosine, cysteine, methionine, lysine, and arginine were below those after a relaxation session. The values for other blood parameters including total protein, albumin, glucose, and total cholesterol did not show any differences between the 2 sessions. These results indicate that mental fatigue may be characterized by a decrease in the plasma level of these amino acids.
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Affiliation(s)
- K Mizuno
- Department of Physiology, Osaka City University Graduate School of Medicine, Osaka, Japan
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Morishima Y, Miyakawa T, Furuyashiki T, Tanaka Y, Mizuma H, Nakanishi S. Enhanced cocaine responsiveness and impaired motor coordination in metabotropic glutamate receptor subtype 2 knockout mice. Proc Natl Acad Sci U S A 2005; 102:4170-5. [PMID: 15753323 PMCID: PMC554835 DOI: 10.1073/pnas.0500914102] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Extensive pharmacological studies have recently emerged indicating that group 2 metabotropic glutamate receptors (mGluRs) comprising mGluR2 and mGluR3 subtypes are associated with several neurological and psychiatric disorders. mGluR2 is widely distributed both presynaptically and postsynaptically in a variety of neuronal cells, but the physiological role of mGluR2 in brain function is poorly understood. This investigation involves a comprehensive behavioral analysis of mGluR2-/- knockout (KO) mice to explore the physiological role of mGluR2 in brain function. Although, under general observation, mGluR2-/- KO mice appeared to have no behavioral abnormalities, they exhibited several lines of behavioral alterations in the enforcing and defined behavioral tests. They showed a significant increase in locomotor sensitization and conditioned place preference in association with repeated cocaine administration, indicating that mGluR2 contributes to behavioral responses implicated in reinforcement and addiction of cocaine. Upon in vivo microdialysis analysis after cocaine administration, not only did extracellular levels of dopamine increase but also the response pattern of glutamate release markedly changed in the nucleus accumbens of mGluR2-/- KO mice. The mGluR2-/- KO mice also showed significant impairment in motor coordination in the accelerating rota-rod test and exhibited hyperlocomotion in novel environmental and stressful conditions, when assessed by the open-field and forced-swim tests. These results indicate that the inhibitory mGluR2 plays a pivotal role in synaptic regulation of glutamatergic transmission in the neural network.
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Affiliation(s)
- Yosuke Morishima
- Department of Biological Sciences, Kyoto University Faculty of Medicine, Kyoto 606-8501, Japan
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38
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Wada Y, Matsumura A, Nakamura F, Tanaka M, Mizuma H, Mizuno K, Nozaki S, Nakajima H, Kondo S, Ishii K, Koyama K, Hamazawa Y, Okuma T, Okamura T, Inoue Y, Watanabe Y. Performance evaluation of microPET P4 for rat, rabbit and monkey. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.ics.2004.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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39
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Mizuma H, Mizutani M, Nozaki S, Iizuka H, Tohyama H, Nishimura N, Watanabe Y, Kohashi R. Improvement by repeated administration of 6R-tetrahydrobiopterin of 5,7-dihydroxytryptamine-induced abnormal behaviors in immature rats. Biochem Biophys Res Commun 2003; 302:156-61. [PMID: 12593863 DOI: 10.1016/s0006-291x(03)00128-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
To clarify the therapeutic effects of 6R-L-erythro-5,6,7,8-tetrahydrobiopterin (6R-BH(4)) on the abnormal behaviors induced by neonatal 5,7-dihydroxytryptamine (5,7-DHT, 100 microg; i.c.v.) treatment in immature rats, 6R-BH(4) (10-40 mg/kg) was administered intraperitoneally from 22nd to 28th days or only once on the 28th day. The locomotion activities decreased dramatically in 5,7-DHT-treated rats (p<0.01; as compared to controls) on the 28th day. The reduced locomotion was recovered dose-dependently by repeated administration of 6R-BH(4), whereas it was not altered after a single injection of 6R-BH(4). In addition, repeated administration of 6R-BH(4) significantly facilitated 5-HT turnover ratio (5-HIAA/5-HT) in the striatum, cerebral cortex, and cerebellum. These findings suggest that the behavioral restoration by 6R-BH(4) might be due to the enhancement of 5-HT turnover by accumulated but not a single dose of 6R-BH(4).
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Affiliation(s)
- Hiroshi Mizuma
- Depatment of Clinical Pathology, Kyorin University School of Health Sciences, 476 Miyashita-cho, Hachioji, Tokyo 192-8508, Japan
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Nozaki S, Nakata R, Mizuma H, Nishimura N, Watanabe Y, Kohashi R, Watanabe Y. In vitro autoradiographic localization of (125)i-secretin receptor binding sites in rat brain. Biochem Biophys Res Commun 2002; 292:133-7. [PMID: 11890683 DOI: 10.1006/bbrc.2002.6640] [Citation(s) in RCA: 29] [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: 11/22/2022]
Abstract
Although the existence of the receptor for secretin in the brain was suggested, the localization of secretin receptor and the neuronal function of secretin have not been clarified yet. In the present study, the localization of secretin receptor was investigated in the rat brain by using an in vitro autoradiography technique. Frozen section autoradiography with (125)I-secretin showed intense binding in the nucleus of solitary tract, laterodorsal thalamic nucleus, and accumbens nucleus; moderate binding in the hippocampus, caudate/putamen, cerebellum, cingulate and orbital cortices. Scatchard plot analysis gave the Kd value of 125 pM with Bmax of 134 fmol/mg tissue in the hippocampus. The binding specificity was confirmed with secretin and its analogs, VIP, PACAP, and glucagon. These results indicate the secretin receptor system might have some neural functions in the brain, which could give the basis for therapeutic use of secretin in autistic children.
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Affiliation(s)
- Satoshi Nozaki
- Department of Physiology, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka 545-8585, Japan
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41
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Hilton CW, Mizuma H, Svec F, Prasad C. Relationship between plasma cyclo (His-Pro), a neuropeptide common to processed protein-rich food, and C-peptide/insulin molar ratio in obese women. Nutr Neurosci 2002; 4:469-74. [PMID: 11843266 DOI: 10.1080/1028415x.2001.11747382] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Cyclo (His-Pro) (CHP) is a gut-brain peptide whose plasma levels in humans are increased after glucose ingestion and preferentially altered by oral glucose ingestion compared to intravenous administration in rats, suggesting a role in the enteroinsular response to nutrient ingestion. We were interested in examining levels of CHP in women of differing weights and comparing these levels to various parameters of insulin secretion. Plasma from 26 fasting, nondiabetic women ranging from 21 to 70 years of age and weighing 43 to 114 kg was assayed for CHP. Insulin and C-peptide levels were measured in 17 of the 26. Fasting CHP levels were elevated in obese compared to nonobese women (2075+/-144 vs. 905+/-187 pg/ml; p < 0.001) and were related by regression analysis to weight (r = 0.668, p < 0.001) and body mass index (r = 0.636, p = 0.001). The fasting C peptide/insulin molar ratio, which may be used as an estimate of hepatic insulin clearance (HIC), was inversely related to CHP levels (r = -0.568, p = 0.017). We conclude CHP levels are increased in obese women and inversely related to their C-peptide/insulin molar ratio. The elevation of CHP in those with a decrease in this estimate of HIC (obese) is interesting as the greater insulin response seen in normal persons after oral glucose compared to intravenous glucose has been postulated to be due to a decrease in HIC by some gut factor. The presence of such a factor in excess in the obese might explain part of their hyperinsulinemia.
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Affiliation(s)
- C W Hilton
- Department of Medicine, LSU Health Sciences Center, New Orleans, LA 70112, USA.
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42
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Murakami M, Araki O, Hosoi Y, Kamiya Y, Morimura T, Ogiwara T, Mizuma H, Mori M. Expression and regulation of type II iodothyronine deiodinase in human thyroid gland. Endocrinology 2001; 142:2961-7. [PMID: 11416017 DOI: 10.1210/endo.142.7.8280] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have studied the expression of type II iodothyronine deiodinase (DII) in human thyroid tumors and cultured human thyroid cells to elucidate the mechanisms involved in the regulation of DII expression in human thyroid gland. Three cases with hyperfunctioning thyroid adenoma, including a case that showed an activating mutation of G(s)alpha with a constitutive activation of cAMP production in cultured cells, and six cases with papillary thyroid carcinoma were analyzed in the present study. Free T(3) was increased, whereas free T(4) was within the normal range in all patients with hyperfunctioning thyroid adenoma. Thyroid tumor tissue and surrounding nontumor tissue were obtained at the time of surgery, and DII expression was compared between tumor tissue and nontumor tissue in each case. Northern analysis demonstrated the presence of DII messenger RNA (mRNA) approximately 7.5 kb in size in all of the tumor and nontumor tissues. DII mRNA and DII activity in hyperfunctioning thyroid adenoma were significantly increased compared with those in nontumor tissue in each case. In contrast, DII mRNA and DII activity in papillary thyroid carcinoma were decreased compared with those in nontumor tissue in each case. DII mRNA and DII activity in cultured human thyroid cells were significantly stimulated by TSH in a dose-dependent manner. The promoter activity of the human DII gene including the complete cAMP response element, transfected to cultured human thyroid cells, was stimulated by (Bu)(2)cAMP. In summary, these results suggest that DII expression in human thyroid gland is regulated at the transcriptional level through the TSH receptor-G(s)alpha-cAMP regulatory cascade, which may be related to the increase in circulating T(3) level in patients with Graves' disease and hyperfunctioning thyroid adenoma.
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Affiliation(s)
- M Murakami
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi 371-8511, Japan.
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Abstract
Thymic hyperplasia is associated with Graves' disease. It has been demonstrated that thyrotropin receptors are expressed in human thymus, and thymic thyrotropin receptors are suggested to be involved in the pathophysiology of Graves' disease. We have studied whether thyrotropin receptors are expressed in rat thymic tissue. Thyrotropin receptor mRNA was demonstrated in 5-day-old, 10-day-old, 20-day-old and adult rat thymus by reverse transcription polymerase chain reaction. Thyrotropin receptor mRNA was also demonstrated in cultured rat thymic epithelial cells. Thyrotropin stimulated cyclic AMP production in cultured rat thymic epithelial cells, suggesting the expression of functional thyrotropin receptors. The present results indicate that thyrotropin receptors are expressed in rat thymus.
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Affiliation(s)
- M Murakami
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi, Japan.
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44
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Murakami M, Mizuide M, Kashima K, Kojima A, Tomioka SI, Kohama T, Araki O, Ogiwara T, Mizuma H, Mori M. Identification of monoclonal insulin autoantibodies in insulin autoimmune syndrome associated with HLA-DRB1*0401. Horm Res 2001; 54:49-52. [PMID: 11182636 DOI: 10.1159/000063437] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We have characterized HLA and insulin autoantibodies in a Japanese female patient with insulin autoimmune syndrome. Serological HLA typing demonstrated the patient had HLA-DR4, and DNA typing showed she had HLA-DRB1*0401 which has not been reported in patients with insulin autoimmune syndrome in Japan. A single binding affinity of insulin autoantibodies was demonstrated by Scatchard analysis and immunoglobulin class of insulin autoantibodies was exclusively IgG-kappa. HLA-DRB1*0406 is strikingly associated with patients with insulin autoimmune syndrome who have polyclonal insulin autoantibodies. The present report demonstrated the first Japanese patient with insulin autoimmune syndrome carrying HLA-DRB1*0401 who was revealed to have monoclonal insulin autoantibodies. The present results indicate that HLA molecules are the major determinants of polyclonal insulin autoantibodies and monoclonal insulin autoantibodies in insulin autoimmune syndrome.
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Affiliation(s)
- M Murakami
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi 371-8511, Japan.
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Murakami M, Kamiya Y, Morimura T, Araki O, Imamura M, Ogiwara T, Mizuma H, Mori M. Thyrotropin receptors in brown adipose tissue: thyrotropin stimulates type II iodothyronine deiodinase and uncoupling protein-1 in brown adipocytes. Endocrinology 2001; 142:1195-201. [PMID: 11181535 DOI: 10.1210/endo.142.3.8012] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [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: 11/19/2022]
Abstract
It has been demonstrated that TSH receptors are expressed not only in thyroid gland but also in extrathyroidal tissues. Brown adipose tissue of guinea pig has been reported to express TSH receptor messenger RNA (mRNA), but the physiological roles of TSH receptors in brown adipose tissue have not been understood. We studied the expression and function of TSH receptors in rat brown adipose tissue and cultured rat brown adipocytes. Northern analysis demonstrated the expression of TSH receptor mRNA in rat brown adipose tissue and cultured rat brown adipocytes. TSH receptor mRNA in rat brown adipose tissue was decreased by cold exposure of the rat, and its mRNA in cultured rat brown adipocytes was also decreased by incubation with TSH or (Bu)(2)cAMP. TSH increased the intracellular cAMP concentration in cultured rat brown adipocytes in a dose dependent manner. Type II iodothyronine deiodinase mRNA, its activity, and uncoupling protein-1 mRNA in cultured rat brown adipocytes were significantly increased by incubation with TSH in a dose-dependent manner. These results suggest the expression of functional TSH receptors in brown adipose tissue, which may be involved in regulation of the expression of type II iodothyronine deiodinase and uncoupling protein-1.
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Affiliation(s)
- M Murakami
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi 371-8511, Japan. .-u.ac.jp
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Abstract
Thyroid hormone has been reported to have significant effects on the peripheral vascular system, including relaxation of vascular smooth muscle cells and antiatherosclerotic effects. To exert its biological activity, thyroxine, which is a major secretory product of thyroid gland, needs to be converted to 3,5,3'-triiodothyronine (T(3)) by iodothyronine deiodinase. Type I iodothyronine deiodinase (DI) is widely distributed and maintains circulating T(3) level, whereas type II iodothyronine deiodinase (DII) is present in a limited number of tissues to provide local intracellular T(3). In the present study, we have identified iodothyronine deiodinase in cultured human coronary artery smooth muscle cells (hCASMCs) and human aortic smooth muscle cells (hASMCs). All of the characteristics of the deiodinating activity in hCASMCs and hASMCs were compatible with DII. Northern analysis demonstrated that DII mRNA was expressed in both hCASMCs and hASMCs, and DII mRNA levels as well as DII activities were rapidly increased by dibutyryl-cAMP or forskolin. These data demonstrate, for the first time, the expression of DII in human vascular smooth muscle cells, which is regulated by a cAMP-mediated mechanism. The present results suggest a previously unrecognized role of local T(3) production by DII in the pathophysiology of human vascular smooth muscle cells.
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MESH Headings
- Blotting, Northern
- Bucladesine/pharmacology
- Cells, Cultured
- Colforsin/pharmacology
- Gene Expression Regulation, Enzymologic/drug effects
- Humans
- Iodide Peroxidase/drug effects
- Iodide Peroxidase/genetics
- Iodide Peroxidase/metabolism
- Kinetics
- Muscle, Smooth, Vascular/cytology
- Muscle, Smooth, Vascular/drug effects
- Muscle, Smooth, Vascular/metabolism
- RNA, Messenger/drug effects
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Thyroid Gland
- Thyroid Hormones/metabolism
- Thyroid Hormones/pharmacology
- Time Factors
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Affiliation(s)
- H Mizuma
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi, Japan
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47
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Murakami M, Araki O, Morimura T, Hosoi Y, Mizuma H, Yamada M, Kurihara H, Ishiuchi S, Tamura M, Sasaki T, Mori M. Expression of type II iodothyronine deiodinase in brain tumors. J Clin Endocrinol Metab 2000; 85:4403-6. [PMID: 11095486 DOI: 10.1210/jcem.85.11.6952] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Type II iodothyronine deiodinase (DII) messenger ribonucleic acid (mRNA) and its activity have been demonstrated in human normal brain. Although DII activity has been demonstrated in brain tumors, expression of DII mRNA has not been studied in these tumors. To investigate the mechanisms involved in the expression of DII activity in brain tumors, we studied DII mRNA and DII activity in astrocytoma (two cases), glioblastoma (three cases), and oligodendroglioma (one case). DII mRNA, the size of which was indistinguishable from that in control cerebral cortical tissue, was demonstrated in all of the brain tumors tested, although the intensity of the hybridization signal showed wide variation among the tumors. DII activity was also detected in all tumors. DII mRNA and DII activity were highest in the tissue from oligodendroglioma. A significantly positive correlation was observed between DII mRNA and DII activity in these tumors (r = 0.94; P < 0.01), suggesting that DII expression in brain tumors is regulated at the pretranslational level. The present results demonstrate, for the first time, that DII mRNA as well as DII activity are expressed in brain tumors, and that DII mRNA is significantly correlated with DII activity in those tissues.
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Affiliation(s)
- M Murakami
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi, Japan.
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Naganuma A, Mizuma H, Doi I, Ono A, Tsukioka G, Watanabe Y, Tsukagoshi H, Takagi H, Dobashi K, Mori M. [A case of acute respiratory distress syndrome induced by fulminant influenza A (H3 N2) pneumonia]. Nihon Kokyuki Gakkai Zasshi 2000; 38:783-7. [PMID: 11186925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
We report a rare case of acute respiratory distress syndrome (ARDS) induced by Influenza A (H3 N2) without secondary microbiological infection. A 69-year-old woman was admitted to our hospital because of cough and severe dyspnea. We diagnosed ARDS, because of the severe respiratory failure resistant to high-dose oxygen, the diffuse bilateral infiltrates without cardiomegaly on chest radiography, and the normal pulmonary artery wedge pressure. This patient was treated with high doses of methylprednisolone, antibiotics, globulins, urinastatin, neutrophilic elastase inhibitor, nitric oxide inhalation, and extracorporeal membrane oxygenation, but died on the thirteenth hospital day. Our final diagnosis was ARDS induced by fulminant influenza (A/Hong Kong/68 (H3 N2)) virus pneumonia, because the antibody titers of H3 N2 influenza of paired sera showed a 128-fold increase.
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Affiliation(s)
- A Naganuma
- First Department of Internal Medicine, Gunma University Faculty of Medicine
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Hosoi Y, Murakami M, Mizuma H, Ogiwara T, Imamura M, Mori M. Expression and regulation of type II iodothyronine deiodinase in cultured human skeletal muscle cells. J Clin Endocrinol Metab 1999; 84:3293-300. [PMID: 10487701 DOI: 10.1210/jcem.84.9.5969] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
T4, which is a major secretory product of the thyroid gland, needs to be converted to T3 by iodothyronine deiodinase to exert its biological activity. After the molecular cloning of human type II iodothyronine deiodinase (DII) complementary DNA, DII expression was unexpectedly detected in human skeletal muscle tissue. In the present study, we have identified DII activity and DII messenger ribonucleic acid (mRNA) in cultured human skeletal muscle cells and studied the mechanisms involved in the regulation of DII expression in those cells. All of the characteristics of the deiodinating activity in cultured human skeletal muscle cells were compatible with those of DII. Northern analysis has demonstrated that DII mRNA, approximately 7.5 kb in size, was expressed in cultured human skeletal muscle cells. DII mRNA and DII activity were rapidly increased by (Bu)2cAMP, forskolin, or beta-adrenergic agonists and were negatively regulated by thyroid hormones in cultured human skeletal muscle cells. Although interleukin-1beta and interleukin-6 did not decrease DII expression in cultured human skeletal muscle cells, tumor necrosis factor-alpha decreased DII expression in those cells in a dose-dependent manner. These data have demonstrated, for the first time, that DII activity and DII mRNA are present in cultured human skeletal muscle cells, and that the DII expression is stimulated by beta-adrenergic mechanisms through a cAMP-mediated pathway and is negatively regulated by thyroid hormones and tumor necrosis factor-alpha.
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Affiliation(s)
- Y Hosoi
- First Department of Internal Medicine, Gunma University School of Medicine, Maebashi, Japan
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Escobar O, Mizuma H, Sothern MS, Blecker U, Udall JN, Suskind RM, Hilton C, Vargas A. Hepatic insulin clearance increases after weight loss in obese children and adolescents. Am J Med Sci 1999; 317:282-6. [PMID: 10334114 DOI: 10.1097/00000441-199905000-00003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Obesity is a rapidly increasing health problem among US youth. Hyperinsulinemia is associated with obesity and has been found to be a contributory factor for the development of cardiovascular disease in the obese. It has been suggested that hyperinsulinemia of obesity is a result of increased insulin secretion caused by insulin resistance. However, it has been shown in adults that decreased hepatic insulin clearance (HIC) is the primary cause of hyperinsulinemia in this population. METHODS We studied 15 obese children and adolescents (11 F, 4 M; 8.6 to 18.1 years) before and 10 weeks after their enrollment in a multidisciplinary weight reduction program, which included a protein-sparing modified fast, a moderate intensity progressive exercise program, and a behavior-modification intervention. RESULTS All patients lost weight (P < 0.05). Measurements of immunoreactive insulin (IRI) and C-peptide reactivity (CPR) were performed before the program and at 10 weeks. IRI levels dropped significantly, whereas CPR levels did not change. CPR/IRI molar ratios, considered an indirect estimation of HIC, rose significantly after weight loss. CONCLUSIONS Our data suggest that hyperinsulinemia seen in obese children and adolescents is caused by decreased HIC. The cause for this decrease remains unknown, but it is reversible upon weight loss.
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Affiliation(s)
- O Escobar
- Department of Pediatrics, Louisiana State University Medical Center, New Orleans, USA
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