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Sakai T, Ogata A, Ikenuma H, Yamada T, Hattori S, Abe J, Imamura S, Ichise M, Tada M, Kakita A, Koyama H, Suzuki M, Kato T, Ito K, Kimura Y. A novel PET probe to selectively image heat shock protein 90α/β isoforms in the brain. EJNMMI Radiopharm Chem 2024; 9:19. [PMID: 38436869 PMCID: PMC10912062 DOI: 10.1186/s41181-024-00248-0] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Accepted: 02/22/2024] [Indexed: 03/05/2024] Open
Abstract
BACKGROUND Heat shock proteins (HSPs) are present throughout the brain. They function as molecular chaperones, meaning they help with the folding and unfolding of large protein complexes. These chaperones are vital in the development of neuropathological conditions such as Alzheimer's disease and Lewy body disease, with HSP90, a specific subtype of HSP, playing a key role. Many studies have shown that drugs that inhibit HSP90 activity have beneficial effects in the neurodegenerative diseases. Therefore, HSP90 PET imaging ligand can be used effectively to study HSP90 in neurodegenerative diseases. Among four HSP90 isoforms, two cytosolic isoforms (HSP90α and HSP90β) thought to be involved in the structural homeostasis of the proteins related to the neurodegenerative diseases. Currently, no useful PET imaging ligands selectively targeting the two cytosolic isoforms of HSP90 have been available yet. RESULTS In this study, we developed a novel positron emission tomography (PET) imaging ligand, [11C]BIIB021, by 11C-radiolabeling (a positron emitter with a half-life of 20.4 min) 6-Chloro-9-[(4-methoxy-3,5-dimethylpyridin-2-yl)methyl]-9H-purin-2-amine (BIIB021), an inhibitor with a high affinity for and selectivity to HSP90α and HSP90β. [11C]BIIB021 was synthesized with a high yield, molar activity and radiochemical purity. [11C]BIIB021 showed a high binding affinity for rat brain homogenate as well as human recombinant HSP90α and HSP90β proteins. Radioactivity was well detected in the rat brain (SUV 1.4). It showed clear specific binding in PET imaging of healthy rats and autoradiography of healthy rat and human brain sections. Radiometabolite was detected in the brain, however, total distribution volume was well quantified using dual-input graphical model. Inhibition of p-glycoprotein increased brain radioactivity concentrations. However, total distribution volume values with and without p-glycoprotein inhibition were nearly the same. CONCLUSIONS We have developed a new PET imaging agent, [11C]BIIB021, specifically targeting HSP90α/β. We have been successful in synthesizing [11C]BIIB021 and in vitro and in vivo imaging HSP90α/β. However, the quantification of HSP90α/β is complicated by the presence of radiometabolites in the brain and the potential to be a substrate for p-glycoprotein. Further efforts are needed to develop radioligand suitable for imaging of HSP90α/β.
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Affiliation(s)
- Takayuki Sakai
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Aya Ogata
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
- Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science (GUMS), Kani, Japan
| | - Hiroshi Ikenuma
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Takashi Yamada
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Saori Hattori
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Junichiro Abe
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Shinichi Imamura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Masanori Ichise
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Mari Tada
- Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Akiyoshi Kakita
- Department of Pathology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Hiroko Koyama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Masaaki Suzuki
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Takashi Kato
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan
| | - Yasuyuki Kimura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, Research Institute, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-cho, Obu, Aichi, 474-8511, Japan.
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Furukawa S, Kawaguchi K, Chikama K, Yamada R, Kamatari YO, Lim LW, Koyama H, Inoshima Y, Ikemoto MJ, Yoshida S, Hirata Y, Furuta K, Takemori H. Simple methods for measuring milk exosomes using fluorescent compound GIF-2250/2276. Biochem Biophys Res Commun 2024; 696:149505. [PMID: 38219490 DOI: 10.1016/j.bbrc.2024.149505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 12/24/2023] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
Exosomes are small extracellular vesicles (EVs) found in culture supernatants, blood, and breast milk. The size of these nanocomplexes limits the methods of EV analyses. In this study, nitrobenzoxadiazole (NBD), a fluorophore, conjugated endosome-lysosome imager, GIF-2250 and its derivative, GIF-2276, were evaluated for exosome analyses. A correlation was established between GIF-2250 intensity and protein maker levels in bovine milk exosomes. We found that high-temperature sterilization milk may not contain intact exosomes. For precise analysis, we synthesized GIF-2276, which allows for the covalent attachment of NBD to the Lys residue of exosome proteins, and labeled milk exosomes were separated using a gel filtration system. GIF-2276 showed chromatographic peaks of milk exosomes containing >3 ng protein. The area (quantity) and retention time (size) of the exosome peaks were correlated to biological activity (NO synthesis suppression in RAW264.7 murine macrophages). Heat denaturation of purified milk-derived exosomes disrupted these indicators. Proteome analyses revealed GIF-2276-labeled immunomodulators, such as butyrophilin subfamily 1 member A1 and polymeric immunoglobulin receptor. The immunogenicity and quantity of these factors decreased by heat denaturation. When milk exosomes were purified from market-sourced milk we found that raw and low-temperature sterilization milk samples, contained exosomes (none in high-temperature sterilization milk). These results were also supported by transmission electron microscopy analyses. We also found that GIF-2276 could monitor exosome transportation into HEK293 cells. These results suggested that GIF-2250/2276 may be helpful to evaluate milk exosomes.
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Affiliation(s)
- Saho Furukawa
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Kyoka Kawaguchi
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Kotomi Chikama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Ryohei Yamada
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yuji O Kamatari
- Life Science Research Center, Gifu University, Gifu, Gifu, 501-1193, Japan; The United Graduate School of Drug Discovery and Medical Information Sciences of Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Lee Wah Lim
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Hiroko Koyama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan; The United Graduate School of Drug Discovery and Medical Information Sciences of Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan
| | - Yasuo Inoshima
- Laboratory of Food and Environmental Hygiene, Cooperative Department of Veterinary Medicine, Faculty of Applied Biological Sciences, Gifu University, Gifu, 501-1193, Japan
| | - Mitsushi J Ikemoto
- Health and Medical Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566, Japan; Advanced Research Initiative for Human High Performance (ARIHHP), Faculty of Health and Sports Sciences, University of Tsukuba, Tsukuba, 305-8574, Japan
| | - Saishi Yoshida
- Seki Gyunyu Co. Ltd, 41, Kannonmae, Seki, Gifu, 501-3835, Japan
| | - Yoko Hirata
- Life Science Research Center, Gifu University, Gifu, Gifu, 501-1193, Japan
| | - Kyoji Furuta
- GIFU EXOSOME Co. Ltd, 1-11-9, Yabuta-minani, Gifu, 500-8384, Japan
| | - Hiroshi Takemori
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan; The United Graduate School of Drug Discovery and Medical Information Sciences of Gifu University, 1-1 Yanagido, Gifu, 501-1193, Japan; GIFU EXOSOME Co. Ltd, 1-11-9, Yabuta-minani, Gifu, 500-8384, Japan.
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Ikenuma H, Ogata A, Koyama H, Ji B, Ishii H, Yamada T, Abe J, Seki C, Nagai Y, Ichise M, Minamimoto T, Higuchi M, Zhang MR, Kato T, Ito K, Suzuki M, Kimura Y. Synthesis and evaluation of a novel PET ligand, a GSK'963 analog, aiming at autoradiography and imaging of the receptor interacting protein kinase 1 in the brain. EJNMMI Radiopharm Chem 2023; 8:31. [PMID: 37853253 PMCID: PMC10584749 DOI: 10.1186/s41181-023-00217-z] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 10/11/2023] [Indexed: 10/20/2023] Open
Abstract
BACKGROUND Receptor interacting protein kinase 1 (RIPK1) is a serine/threonine kinase, which regulates programmed cell death and inflammation. Recently, the involvement of RIPK1 in the pathophysiology of Alzheimer's disease (AD) has been reported; RIPK1 is involved in microglia's phenotypic transition to their dysfunctional states, and it is highly expressed in the neurons and microglia in the postmortem brains in AD patients. They prompt neurodegeneration leading to accumulations of pathological proteins in AD. Therefore, regulation of RIPK1 could be a potential therapeutic target for the treatment of AD, and in vivo imaging of RIPK1 may become a useful modality in studies of drug discovery and pathophysiology of AD. The purpose of this study was to develop a suitable radioligand for positron emission tomography (PET) imaging of RIPK1. RESULTS (S)-2,2-dimethyl-1-(5-phenyl-4,5-dihydro-1H-pyrazol-1-yl)propan-1-one (GSK'963) has a high affinity, selectivity for RIPK1, and favorable physiochemical properties based on its chemical structure. In this study, since 11C-labeling (half-life: 20.4 min) GSK'963 retaining its structure requiring the Grignard reaction of tert-butylmagnesium halides and [11C]carbon dioxide was anticipated to give a low yield, we decided instead to 11C-label a GSK'963 analog ((S)-2,2-dimethyl-1-(5-(m-tolyl)-4,5-dihydro-1H-pyrazol-1-yl)propan-1-one, GG502), which has a high RIPK1 inhibitory activity equivalent to that of the original compound GSK'963. Thus, we successfully 11C-labeled GG502 using a Pd-mediated cross-coupling reaction in favorable yields (3.6 ± 1.9%) and radiochemical purities (> 96%), and molar activity (47-115 GBq/μmol). On autoradiography, radioactivity accumulation was observed for [11C]GG502 and decreased by non-radioactive GG502 in the mouse spleen and human brain, indicating the possibility of specific binding of this ligand to RIPK1. On brain PET imaging in a rhesus monkey, [11C]GG502 showed a good brain permeability (peak standardized uptake value (SUV) ~3.0), although there was no clear evidence of specific binding of [11C]GG502. On brain PET imaging in acute inflammation model rats, [11C]GG502 also showed a good brain permeability, and no significant increased uptake was observed in the lipopolysaccharide-treated side of striatum. On metabolite analysis in rats at 30 min after administration of [11C]GG502, ~55% and ~10% of radioactivity was from unmetabolized [11C]GG502 in the brain and the plasma, respectively. CONCLUSIONS We synthesized and evaluated a 11C-labeled PET ligand based on the methylated analog of GSK'963 for imaging of RIPK1 in the brain. Although in autoradiography of the resulting [11C]GG502 indicated the possibility of specific binding, the actual PET imaging failed to detect any evidence of specific binding to RIPK1 despite its good brain permeability. Further development of radioligands with a higher binding affinity for RIPK1 in vivo and more stable metabolite profiles compared with the current compound may be required.
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Affiliation(s)
- Hiroshi Ikenuma
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
| | - Aya Ogata
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
- Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science (GUMS), Kani, Japan
| | - Hiroko Koyama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Bin Ji
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
- Department of Radiopharmacy and Molecular Imaging, School of Pharmacy, Fudan University, Shanghai, China
| | - Hideki Ishii
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
- Department of Advanced Nuclear Medicine Sciences, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Takashi Yamada
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
| | - Junichiro Abe
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
| | - Chie Seki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Yuji Nagai
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Masanori Ichise
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Takafumi Minamimoto
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Makoto Higuchi
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Ming-Rong Zhang
- Department of Advanced Nuclear Medicine Sciences, National Institutes for Quantum Science and Technology (QST), Chiba, Japan
| | - Takashi Kato
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Yasuyuki Kimura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), 7-430 Morioka-Cho, Obu, Aichi, 474-8511, Japan.
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology (QST), Chiba, Japan.
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Nakanishi S, Kinoshita K, Kurauchi Y, Seki T, Kimura Y, Suzuki M, Suzuki K, Koyama H, Kagechika H, Katsuki H. Acyclic retinoid peretinoin reduces hemorrhage-associated brain injury in vitro and in vivo. Eur J Pharmacol 2023; 954:175899. [PMID: 37392831 DOI: 10.1016/j.ejphar.2023.175899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/28/2023] [Accepted: 06/29/2023] [Indexed: 07/03/2023]
Abstract
Peretinoin is an acyclic retinoid that stimulates retinoic acid receptors (NR1Bs) and produces therapeutic effects on hepatocellular cancer. We have previously shown that NR1B agonists such as Am80 and all trans-retinoic acid suppress pathogenic events in intracerebral hemorrhage. The present study addressed the actions of peretinoin and Am80 against cytotoxicity of a blood protease thrombin on cortico-striatal slice cultures obtained from neonatal rat brains. Application of 100 U/ml thrombin to the slice cultures for 72 h caused cell death in the cortical region and tissue shrinkage in the striatal region. Peretinoin (50 μM) and Am80 (1 μM) counteracted these cytotoxic effects of thrombin, and the effect of peretinoin and Am80 was blocked by LE540, an NR1B antagonist. A broad-spectrum kinase inhibitor K252a (3 μM) attenuated the cytoprotective effect of peretinoin in the cortical region, whereas a specific protein kinase A inhibitor KT5720 (1 μM) attenuated the protective effect of peretinoin in the cortical and the striatal regions. On the other hand, nuclear factor-κB (NF-κB) inhibitors such as pyrrolidine dithiocarbamate (50 μM) and Bay11-7082 (10 μM) prevented thrombin-induced shrinkage of the striatal region. Peretinoin and Am80 as well as Bay11-7082 blocked thrombin-induced nuclear translocation of NF-κB in striatal microglia and loss of striatal neurons. We also found that daily administration of peretinoin reduced histopathological injury and alleviated motor deficits in a mouse model of intracerebral hemorrhage. These results indicate that NR1B agonists including peretinoin may serve as a therapeutic option for hemorrhagic brain injury.
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Affiliation(s)
- Sakino Nakanishi
- Department of Chemico-Pharmacological Sciences, School of Pharmacy and Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Keita Kinoshita
- Department of Chemico-Pharmacological Sciences, School of Pharmacy and Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Yuki Kurauchi
- Department of Chemico-Pharmacological Sciences, School of Pharmacy and Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan
| | - Takahiro Seki
- Department of Pharmacology, School of Pharmacy, Himeji-Dokkyo University, Hyogo, Japan
| | - Yasuyuki Kimura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Keiichi Suzuki
- Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Hiroko Koyama
- Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan; Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Hiroyuki Kagechika
- Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Tokyo, Japan
| | - Hiroshi Katsuki
- Department of Chemico-Pharmacological Sciences, School of Pharmacy and Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan.
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Nomura TK, Endo S, Kuwano T, Fukasawa K, Takashima S, Todo T, Furuta K, Yamamoto T, Hinoi E, Koyama H, Honda R. ARL-17477 is a dual inhibitor of NOS1 and the autophagic-lysosomal system that prevents tumor growth in vitro and in vivo. Sci Rep 2023; 13:10757. [PMID: 37402770 DOI: 10.1038/s41598-023-37797-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 06/28/2023] [Indexed: 07/06/2023] Open
Abstract
ARL-17477 is a selective neuronal nitric oxide synthase (NOS1) inhibitor that has been used in many preclinical studies since its initial discovery in the 1990s. In the present study, we demonstrate that ARL-17477 exhibits a NOS1-independent pharmacological activity that involves inhibition of the autophagy-lysosomal system and prevents cancer growth in vitro and in vivo. Initially, we screened a chemical compound library for potential anticancer agents, and identified ARL-17477 with micromolar anticancer activity against a wide spectrum of cancers, preferentially affecting cancer stem-like cells and KRAS-mutant cancer cells. Interestingly, ARL-17477 also affected NOS1-knockout cells, suggesting the existence of a NOS1-independent anticancer mechanism. Analysis of cell signals and death markers revealed that LC3B-II, p62, and GABARAP-II protein levels were significantly increased by ARL-17477. Furthermore, ARL-17477 had a chemical structure similar to that of chloroquine, suggesting the inhibition of autophagic flux at the level of lysosomal fusion as an underlying anticancer mechanism. Consistently, ARL-17477 induced lysosomal membrane permeabilization, impaired protein aggregate clearance, and activated transcription factor EB and lysosomal biogenesis. Furthermore, in vivo ARL-17477 inhibited the tumor growth of KRAS-mutant cancer. Thus, ARL-17477 is a dual inhibitor of NOS1 and the autophagy-lysosomal system that could potentially be used as a cancer therapeutic.
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Affiliation(s)
- Teiko Komori Nomura
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Satoshi Endo
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu, Japan
- Center for One Medicine Innovative Translational Research (COMIT), Gifu University, Gifu, Japan
| | - Takuma Kuwano
- Laboratory of Pharmaceutical Analytical Chemistry, Gifu Pharmaceutical University, Gifu, Japan
| | - Kazuya Fukasawa
- Laboratory of Pharmacology, Department of Bioactive Molecules, Gifu Pharmaceutical University, Gifu, Japan
| | - Shigeo Takashima
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
- Center for One Medicine Innovative Translational Research (COMIT), Gifu University, Gifu, Japan
- Division of Genomics Research, Life Science Research Center, Gifu University, Gifu, Japan
- Institute for Glyco-core Research (iGCORE), Gifu University, Gifu, Japan
| | - Tomoki Todo
- Division of Innovative Cancer Therapy, Advanced Clinical Research Center, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Kyoji Furuta
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Takuhei Yamamoto
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
- Center for One Medicine Innovative Translational Research (COMIT), Gifu University, Gifu, Japan
- Laboratory of Pharmaceutical Analytical Chemistry, Gifu Pharmaceutical University, Gifu, Japan
| | - Eiichi Hinoi
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
- Center for One Medicine Innovative Translational Research (COMIT), Gifu University, Gifu, Japan
- Laboratory of Pharmacology, Department of Bioactive Molecules, Gifu Pharmaceutical University, Gifu, Japan
| | - Hiroko Koyama
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Ryo Honda
- United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan.
- Center for One Medicine Innovative Translational Research (COMIT), Gifu University, Gifu, Japan.
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Suzuki K, Koyama H, Nakamura N, Kimura Y, Ogata A, Ikenuma H, Ishii H, Zhang MR, Kawamura K, Minamimoto T, Nagai Y, Katsuki H, Kimura T, Kimura N, Ichise M, Kato T, Ito K, Suzuki M. 11C-Labeling of acyclic retinoid peretinoin by rapid C-[ 11C]methylation to disclose novel brain permeability and central nervous system activities hidden in antitumor agent. Bioorg Med Chem Lett 2023; 85:129212. [PMID: 36871703 DOI: 10.1016/j.bmcl.2023.129212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/02/2023] [Accepted: 02/26/2023] [Indexed: 03/06/2023]
Abstract
Recently, retinoid actions on the central nervous system (CNS) have attracted considerable attention from the perspectives of brain disease diagnosis and drug development. Firstly, we successfully synthesized [11C]peretinoin esters (methyl, ethyl, and benzyl) using a Pd(0)-mediated rapid C-[11C]methylation of the corresponding stannyl precursors without geometrical isomerization in 82%, 66%, and 57% radiochemical yields (RCYs). Subsequent hydrolysis of the 11C-labeled ester produced [11C]peretinoin in 13 ± 8% RCY (n = 3). After pharmaceutical formulation, the resulting [11C]benzyl ester and [11C]peretinoin had high radiochemical purity (>99% each) and molar activities of 144 and 118 ± 49 GBq μmol-1 at total synthesis times of 31 min and 40 ± 3 min, respectively. Rat brain PET imaging for the [11C]ester revealed a unique time-radioactivity curve, suggesting the participation of the acid [11C]peretinoin for the brain permeability. However, the curve of the [11C]peretinoin rose steadily after a shorter time lag to reach 1.4 standardized uptake value (SUV) at 60 min. These various phenomena between the ester and acid became more pronounced in the monkey brain (SUV of > 3.0 at 90 min). With the opportunity to identify high brain uptake of [11C]peretinoin, we discovered CNS activities of a drug candidate called peretinoin, such as the induction of a stem-cell to neuronal cell differentiation and the suppression of neuronal damages.
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Affiliation(s)
- Keiichi Suzuki
- Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan
| | - Hiroko Koyama
- Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan; Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan.
| | - Narumasa Nakamura
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, 1-1 Yanagido, Gifu 501-1194, Japan
| | - Yasuyuki Kimura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan.
| | - Aya Ogata
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan; Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science, 4-3-3 Nijigaoka, Kani 509-0293, Japan
| | - Hiroshi Ikenuma
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Hideki Ishii
- Department of Advanced Nuclear Medicine Sciences, Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Ming-Rong Zhang
- Department of Advanced Nuclear Medicine Sciences, Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Kazunori Kawamura
- Department of Advanced Nuclear Medicine Sciences, Institute for Quantum Medical Science, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Takafumi Minamimoto
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Yuji Nagai
- Department of Functional Brain Imaging, National Institutes for Quantum Science and Technology, 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan
| | - Hiroshi Katsuki
- Department of Chemico-Pharmacological Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto 862-0973, Japan
| | - Tetsuya Kimura
- Department of Aging Neurobiology, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Nobuyuki Kimura
- Section of Cell Biology and Pathology, Department of Alzheimer's Disease Research, Center for Development of Advanced Medicine for Dementia, Japan; Laboratory of Experimental Animals, Research and Development Management Center, National Center for Geriatrics and Gerontology, Morioka 7-430, Obu, Aichi 474-8511, Japan; Department of Veterinary Associated Science, Faculty of Veterinary Medicine, Okayama University of Science, 1-3 Ikoinooka, Imabari, Ehime 794-8555, Japan
| | - Masanori Ichise
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Takashi Kato
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan.
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Ogata A, Ji B, Yamada T, Hattori S, Abe J, Ikenuma H, Ichise M, Koyama H, Suzuki M, Kato T, Ito K, Kimura Y. [ 11C]NCGG401, a novel PET ligand for imaging of colony stimulating factor 1 receptors. Bioorg Med Chem Lett 2022; 65:128704. [PMID: 35351586 DOI: 10.1016/j.bmcl.2022.128704] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 03/20/2022] [Accepted: 03/24/2022] [Indexed: 11/18/2022]
Abstract
Colony-stimulating factor 1 receptors (CSF1R) are expressed exclusively on microglia in the central nervous system. The receptors regulate immune responses by controlling the survival and activity of microglia and are intricately involved in the pathophysiology of Alzheimer's disease. In this study, we developed [11C]NCGG401, a positron emission tomography (PET) ligand, targeting for CSF1R as an imaging biomarker for microglial pathophysiology in Alzheimer's disease. NCGG401 showed a high potency to inhibit human CSF1R kinase activity and a high binding affinity to human CSF1R. PET imaging with [11C]NCGG401 in healthy rats showed a good brain permeability. Furthermore, the specific binding component was determined by postmortem autoradiography in rat brain and human hippocampal sections. The knowledge of the characteristics of [11C]NCCC401, our initial CSF1R compound, we have obtained may be useful for further development and optimization of CSF1R radioligands for PET imaging of microglia.
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Affiliation(s)
- Aya Ogata
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan; Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science (GUMS), Kani, Japan.
| | - Bin Ji
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan; Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan; Department of Radiopharmacy and Molecular Imaging, School of Pharmacy, Fudan University, Shanghai, China
| | - Takashi Yamada
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Saori Hattori
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Junichiro Abe
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Hiroshi Ikenuma
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Masanori Ichise
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan; Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan
| | - Hiroko Koyama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Takashi Kato
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan
| | - Yasuyuki Kimura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology (NCGG), Obu, Japan; Department of Functional Brain Imaging Research, National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology, Chiba, Japan.
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Isogawa K, Asano M, Hayazaki M, Koga K, Watanabe M, Suzuki K, Kobayashi T, Kawaguchi K, Ishizuka A, Kato S, Ito H, Hamamoto A, Koyama H, Furuta K, Takemori H. Thioxothiazolidin derivative, 4-OST, inhibits melanogenesis by enhancing the specific recruitment of tyrosinase-containing vesicles to lysosome. J Cell Biochem 2021; 122:667-678. [PMID: 33480093 DOI: 10.1002/jcb.29895] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 12/29/2020] [Accepted: 01/04/2021] [Indexed: 12/15/2022]
Abstract
Tyrosinase catalyzes the rate-limiting step in melanin synthesis. Melanin is synthesized from l-tyrosin in the melanosomes, where tyrosinase and other melanogenic factors are recruited via the vesicle transport system. Genetic and biochemical approaches have revealed a correlation between impairments in the vesicle transport system and albinism. However, the specificity of the individual transport systems for the corresponding melanogenic factors has not been well elucidated yet. Here, we report that the thioxothiazolidin derivative, 4-OST (4-[(5E)-5-[(4-fluorophenyl)methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]-4-azatricyclo [5.2.1.02 ,6]dec-8-ene-3,5-dione: CAS RN. 477766-87-3) strongly inhibited melanogenesis in mouse melanoma B16F10 cells. 4-OST reduces tyrosinase protein levels without affecting its messenger RNA levels or enzymatic activity. Although a reduction in tyrosinase protein level was observed in the presence of a protein synthesis inhibitor, the reduction may be coupled with protein synthesis. Similarly, GIF-2202 (a derivative of 4-OST) lowers tyrosinase protein levels without affecting the levels of another melanogenic enzyme, tyrosinase-related protein 1 (TYRP1) level. The reduction in tyrosinase protein level is associated with an increase in the levels of the lysosomal proteinase cathepsin S. Chloroquine, a lysosome inhibitor, restored the tyrosinase protein level downregulated by GIF-2202, although no effects of other inhibitors (against proteasome, autophagy, or exocytosis) were observed. In addition, GIF-2202 segregated the immunofluorescence signals of tyrosinase from those of TYRP1. Chloroquine treatment resulted in co-localization of tyrosinase and cathepsin S signals near the perinuclear region, suggesting that 4-OST and GIF-2202 may alter the destination of the tyrosinase vesicle from the melanosome to the lysosome. 4-OST and GIF-2202 can be new tools for studying the tyrosinase-specific vesicle transport system.
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Affiliation(s)
- Kenta Isogawa
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Masataka Asano
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Masumi Hayazaki
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Kenichi Koga
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Miyu Watanabe
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Keiichi Suzuki
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Takahiro Kobayashi
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Kyoka Kawaguchi
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Akane Ishizuka
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Shinya Kato
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Hironari Ito
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Akie Hamamoto
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Hiroko Koyama
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Kyoji Furuta
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
| | - Hiroshi Takemori
- Department of Chemistry and Biomolecular Science, Gifu University, Gifu, Japan
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Saha B, Swain D, Borgohain P, Rout GR, Koyama H, Panda SK. Enhanced exudation of malate in the rhizosphere due to AtALMT1 overexpression in blackgram (Vigna mungo L.) confers increased aluminium tolerance. Plant Biol (Stuttg) 2020; 22:701-708. [PMID: 32174006 DOI: 10.1111/plb.13112] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 03/07/2020] [Indexed: 06/10/2023]
Abstract
Worldwide, 50% of soil is acidic, which induces aluminium (Al) toxicity in plants, as the phyto-availability of Al3+ increases in acidic soil. Plants responds to Al3+ toxicity by exuding organic acids into the rhizosphere. The organic acid responsible for Al3+ stress response varies from species to species, which in the case of blackgram (Vigna mungo L.) is citrate. In blackgram, an Arabidopsis malate transporter, AtALMT1, was overexpressed with the motive of inducing enhanced exudation of malate. Transgenics were generated using cotyledon node explants through Agrobacterium tumefaciens-mediated transformation. The putative transgenics were initially screened by AtALMT1-specific genomic DNA PCR, followed by quantitative PCR. Two independent transgenic events were identified and functionally characterized in the T3 generation. The transgenic lines, Line 1 and 2, showed better root growth, relative water content and chlorophyll content under Al3+ stress. Both lines also accounted for less oxidative damage, due to reduced accumulation of ROS molecules. Photosynthetic efficiency, as measured in terms of Fv /Fm , NPQ and Y(II), increased when compared to the wild type (WT). Relative expression of genes (VmSTOP1, VmALS3, VmMATE) responsible for Al3+ stress response in blackgram showed that overexpression of a malate transporter did not have any effect on their expression. Malate exudation increased whereas citrate exudation did not show any divergence from the WT. A pot stress assay found that the transgenics showed better adaptation to acidic soil. This report demonstrates that the overexpression of a malate transporter in a non-malate exuding species improves adaptation to Al3+ toxicity in acidic soil without effecting its stress response mechanism.
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Affiliation(s)
- B Saha
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, India
| | - D Swain
- Department of Agricultural Biotechnology, Orissa University of Agricultural Technology, Bhubaneswar, India
| | - P Borgohain
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, India
| | - G R Rout
- Department of Agricultural Biotechnology, Orissa University of Agricultural Technology, Bhubaneswar, India
| | - H Koyama
- Faculty of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - S K Panda
- Plant Molecular Biotechnology Laboratory, Department of Life Science and Bioinformatics, Assam University, Silchar, India
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Ogata A, Kimura Y, Ikenuma H, Yamada T, Abe J, Koyama H, Suzuki M, Ichise M, Kato T, Ito K. Brain pharmacokinetics and biodistribution of 11C-labeled isoproterenol in rodents. Nucl Med Biol 2020; 86-87:52-58. [PMID: 32532591 DOI: 10.1016/j.nucmedbio.2020.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Revised: 05/26/2020] [Accepted: 06/02/2020] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Isoproterenol is a non-selective β receptor agonist, which is a drug approved for bradycardia and bronchial asthma in many countries. Recently, isoproterenol has been reported to have the potential as a drug for the treatment of Alzheimer's disease by inhibiting the aggregation of tau protein. Isoproterenol is a highly potent drug causing increases in heart rates even when its plasma concentration is very low. Thus, it is critical to know if potentially effective therapeutic levels of isoproterenol can be achieved, maintaining safe plasma levels without any untoward pharmacological effects. The purpose of the study is to investigate the brain pharmacokinetics and biodistribution of 11C-labeled isoproterenol in rodents. METHODS We performed positron emission tomography (PET) brain imaging and biodistribution studies of [11C]isoproterenol. 120-min scans with arterial blood sampling were performed in rats. Additionally, plasma and brain homogenates were analyzed with radio-HPLC to characterize its metabolite profiles. As a measure of [11C]isoproterenol brain uptake, total distribution volumes were determined by a pharmacokinetic compartment model. Biodistribution of [11C]isoproterenol was investigated in mice at six-time points from 1-min to 90-min after injection. RESULTS We found a modest brain uptake of [11C]isoproterenol. Its brain pharmacokinetics showed that the concentration of isoproterenol in the brain at equilibrium was about two-fold higher than in the plasma (total distribution volumes 2.0 ± 0.2 cm3/mL). Only unmetabolized isoproterenol was detected in the brain at 30 min after injection, although isoproterenol was rapidly metabolized in plasma. The biodistribution study showed that isoproterenol and its metabolite are excreted mainly via the urinary system. CONCLUSIONS, ADVANCES IN KNOWLEDGE AND IMPLICATIONS FOR PATIENT CARE: In this study, we have shown that rat brain concentrations of isoproterenol are only two-fold of that in plasma at equilibrium. If the brain pharmacokinetics are similar in the human brain, it may be difficult to achieve potentially therapeutic levels of this drug safely in humans. Further studies appear warranted to investigate the brain pharmacokinetics in humans with PET using [11C]isoproterenol.
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Affiliation(s)
- Aya Ogata
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan; Department of Pharmacy, Faculty of Pharmacy, Gifu University of Medical Science, Kani, Japan.
| | - Yasuyuki Kimura
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan.
| | - Hiroshi Ikenuma
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan; Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, Gifu, Japan
| | - Takashi Yamada
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Junichiro Abe
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Hiroko Koyama
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan; Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University, Gifu, Japan
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Masanori Ichise
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Takashi Kato
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Japan
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Hirase T, Koyama H, Nagata M, Ishihara J, Miyajima K. Carrier and spin dynamics of high-density exciton magnetic polarons in Cd 0.8Mn 0.2Te. J Phys Condens Matter 2019; 31:425403. [PMID: 31252415 DOI: 10.1088/1361-648x/ab2dc1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We investigated the carrier and spin dynamics of high-density exciton magnetic polarons (HD-EMPs) in Cd0.8Mn0.2Te based on the measurement of their time-resolved photoluminescence (PL) spectra and polarization states, and the utilization of photo-induced Faraday rotation techniques. The PL from the HD-EMPs were collected in a forward scattering configuration, and was observed as a pulsed emission of a few picoseconds duration, exhibiting a blue-shift with time evolution. The blue shift originated from the refractive-index dispersion of the sample. By excluding the influence of the refractive-index dispersion on the time profile, it was revealed that the ultra-short pulsed emission with a time width smaller than 1 ps was initially radiated with a time delay of ~2.4 ps after photoexcitation. From the results of time evolution of the polarization states, it is concluded that the exciton-Mn spin interactions occurs immediately after the excitation, which causes the Mn ion spins to align to follow the spin states of photoexcited excitons. The alignment of the Mn ion spins through the formation of the HD-EMPs was significantly faster than that of the localized EMP. On the other hand, the time evolution of the photo-induced Faraday rotation showed two decay components attributed to spin relaxations of the excitons and Mn ions within the HD-EMP. The observation of the Faraday rotation signal due to the Mn ion spins further confirms that these spins were aligned by the photo-excited spin-aligned excitons. Our findings suggest a novel mechanism for the effective optical control of spins in a semimagnetic semiconductor, which is associated with a multi-exciton system and its localized state.
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Affiliation(s)
- T Hirase
- Department of Applied Physics, Graduate School of Science, Tokyo University of Science, 6-3-1 Niijuku, Katsushika-ku, Tokyo 125-8585, Japan
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Sakaguchi K, Nakatsukasa K, Koyama H, Matsuda T, Kato M, Ouchi Y, Morita M, Taguchi T. Effect of denosumab on low bone mineral density in postmenopausal Japanese early breast cancer patients receiving aromatase nhibitors: 36-month results. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz240.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Ikenuma H, Koyama H, Kajino N, Kimura Y, Ogata A, Abe J, Kawasumi Y, Kato T, Takashima A, Ito K, Suzuki M. Synthesis of (R,S)-isoproterenol, an inhibitor of tau aggregation, as an 11C-labeled PET tracer via reductive alkylation of (R,S)-norepinephrine with [2-11C]acetone. Bioorg Med Chem Lett 2019; 29:2107-2111. [DOI: 10.1016/j.bmcl.2019.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 11/26/2022]
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Koyama H, Izumiseki A, Suzuki M. Organozinc-aided, HMPA-free, stoichiometric three-component coupling for the general synthesis of prostaglandins and stable prostacyclin analogs with biological significance. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.04.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Hanamura T, Ohno K, Houkibara S, Murasawa H, Nakamura T, Watanabe H, Kaizuka M, Sawano S, Koyama H, Ito KI. Abstract P4-01-23: Clinical significance of serum PSA in breast cancer patients. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-p4-01-23] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Recent preclinical data suggest that estrogen receptor (ER) positive breast cancer (BC), may switch from dependence on ER to androgen receptor (AR) as possible mechanism of resistance to ER-targeted endocrine therapy. AR dependency has also been suggested in a subset of ER-, AR+ BC. Based on these findings, clinical trials testing AR-targeting therapies in BC have been conducted. However, predictive markers for response to this type of therapies remain to be elucidated. PSA is the product of an androgen-responsive gene produced also in BC, and serum PSA (sPSA) could be detected in BC patients by a highly sensitive assay. Hypothesis:If sPSA reflects AR dependency of BC, it might be useful as a predictive marker for response to AR-targeting therapy. Methods:In this study, we investigated whether tumor-derived sPSA could be detected in BC patient, and if it might reflect tumor biology. In metastatic breast cancer (MBC) patients continuously observed, sPSA was evaluated monthly by CLEIA method (detection sensitivity ≥ 3 ng/L). Similarly, sPSA was evaluated at arbitrary points in non-BC control and point analysis BC group enrolled regardless of clinicopathological factor or treatment history. In the observational group, the relationship between change in disease condition and sPSA was analyzed. Next, correlations between sPSA and various clinicopathological factors were analyzed using combined data of point analysis group and initial sPSA value of observation group. In this study, 146 BC (26 observation group and 120 point analysis group) and 99 control were enrolled. Results: In the observational analysis, 5 cases showed sPSA change well reflected the disease condition, but not in other 5 cases. In remaining 16 cases, sPSA was undetectable or the observation period was insufficient (<4m). In the point analysis, sPSA was detected in 28.3% and 28.1% in control and BC respectively. Although in pre-menopausal state, there was no significant difference in sPSA between control and BC (4.4 ± 6.98 ng/L vs 3.7 ± 5.5 ng/L), in post-menopausal state, sPSA was significantly higher in BC compared with control (0.7 ± 2.5 ng/L vs 64.6 ± 357.4 ng/L; P<0.05). In analysis limited to post-menopausal BC, sPSA was higher in MBC (de-novo stage 4 and recurrence) compared with non-MBC (Stage0-3) (106.0 ± 457.2 ng/L vs 2.1 ± 8.5 ng/L; P<0.05). Similarly, sPSA was higher in low ki-67 (<20%) cases compared with high ki-67 (≥20%) (105.7 ± 510.8 ng/L vs 30.5 ± 173.7 ng/L; p<0.05). There was no significant difference in sPSA due to histological type, ER or HER2 status and nuclear grade. In correlation analysis of quantitative data limited to post-menopausal MBC, sPSA was negatively correlated with Ki-67 (rS=-0.35, p<0.05) and positively correlated with treatment line of previous endocrine therapy (rS=0.27, p<0.05). It did not correlate with age, disease free interval, number of metastatic organs or treatment line of previous chemotherapy. Conclusion:Our data suggest that sPSA may be tumor-derived at least in post-menopausal MBC and may reflect some kind of tumor biological properties. These all findings justify further studies of the efficacy of sPSA as a predictive marker in AR-targeted therapy.
Citation Format: Hanamura T, Ohno K, Houkibara S, Murasawa H, Nakamura T, Watanabe H, Kaizuka M, Sawano S, Koyama H, Ito K-i. Clinical significance of serum PSA in breast cancer patients [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr P4-01-23.
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Affiliation(s)
- T Hanamura
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - K Ohno
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - S Houkibara
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - H Murasawa
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - T Nakamura
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - H Watanabe
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - M Kaizuka
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - S Sawano
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - H Koyama
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
| | - K-i Ito
- Japanese Red Cross Society Suwa Hospital, Suwa, Nagano, Japan; Suwa Central Hospital, Chino, Nagano, Japan; Okaya City Hospital, Okaya, Nagano, Japan; Koyama Clinic, Suwa, Nagano, Japan; Shinshu University School of Medicine, Matsumoto, Nagano, Japan
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Kundu A, Das S, Basu S, Kobayashi Y, Kobayashi Y, Koyama H, Ganesan M. GhSTOP1, a C2H2 type zinc finger transcription factor is essential for aluminum and proton stress tolerance and lateral root initiation in cotton. Plant Biol (Stuttg) 2019; 21:35-44. [PMID: 30098101 DOI: 10.1111/plb.12895] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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: 06/01/2018] [Accepted: 08/04/2018] [Indexed: 05/25/2023]
Abstract
Aluminum (Al) and proton (H+ ) ions are major acid soil stress factors deleteriously affecting plant root growth and crop yield. In our preliminary studies, cotton (Gossypium hirsutum L.) seedlings displayed very sensitive phenotypes to Al and H+ rhizotoxicities. Based on previous Arabidopsis results, we aimed to characterise the Al stress responsive Sensitive to Proton rhizotoxicity 1 (GhSTOP1) transcription system in cotton using RNAi-mediated down-regulation. With the help of seed embryo apex explants, we developed transgenic cotton plants overexpressing a GhSTOP1-RNAi cassette with NPTII selection. Kanamycin-tolerant T1 seedlings were further considered for Al and H+ stress tolerance studies. Down-regulation of the GhSTOP1 increased sensitivity to Al and proton rhizotoxicities, and root growth was significantly reduced in RNAi lines. The expression profile of GhALMT1 (Aluminum-activated Malate Transporter 1), GhMATE (Multidrug and Toxic Compound Extrusion), GhALS3 (Aluminium Sensitive 3) and key genes involved in the GABA shunt were down-regulated in the transgenic RNAi lines. Additionally, the lateral root initiation process was delayed and expression of GhNAC1, which is involved in lateral roots, was also suppressed in transgenic lines. Besides, overexpression of GhSTOP1 in Arabidopsis accelerated root growth and AtMATE and AtALMT1 expression under Al stress conditions. These analyses indicate that GhSTOP1 is essential for the expression of several genes which are necessary for acid soil tolerance mechanisms and lateral root initiation.
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Affiliation(s)
- A Kundu
- Department of Life Sciences, Presidency University Kolkata, West Bengal, India
| | - S Das
- Department of Life Sciences, Presidency University Kolkata, West Bengal, India
| | - S Basu
- Department of Life Sciences, Presidency University Kolkata, West Bengal, India
| | - Y Kobayashi
- Department of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - Y Kobayashi
- Department of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - H Koyama
- Department of Applied Biological Sciences, Gifu University, Gifu, Japan
| | - M Ganesan
- Department of Life Sciences, Presidency University Kolkata, West Bengal, India
- Department of Applied Biological Sciences, Gifu University, Gifu, Japan
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Nishioka Y, Hasegawa K, Saiura A, Oba M, Yamamoto J, Nomura Y, Takayama T, Hashiguchi Y, Shibasaki M, Sakamoto H, Yamagata S, Aoyanagi N, Kaneko H, Koyama H, Miyagawa S, Mise Y, Shinozaki E, Yoshida S, Nozawa H, Kokudo N. A multicenter phase II trial to evaluate the efficacy of mFOLFOX6+cetuximab as induction chemotherapy to achieve R0 surgical resection for advanced colorectal liver metastases (NEXTO trial). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy281.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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18
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Matsumoto S, Koyama H, Hatano T, Sadamasa N, Kai Y, Saka M, Ando M, Hashimoto T, Chihara H, Takita W, Tokunaga K, Kamata T, Tujimoto A, Nagata I, Kira J. The development of visual task management ICT system for acute stroke care. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.1745] [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: 10/18/2022]
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19
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Motomura A, Shimizu M, Kato A, Motomura K, Yamamichi A, Koyama H, Ohka F, Nishikawa T, Nishimura Y, Hara M, Fukuda T, Bando Y, Nishimura T, Wakabayashi T, Natsume A. Remote ischemic preconditioning protects human neural stem cells from oxidative stress. Apoptosis 2017; 22:1353-1361. [DOI: 10.1007/s10495-017-1425-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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20
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Furuta K, Kawai Y, Mizuno Y, Hattori Y, Koyama H, Hirata Y. Synthesis of 3-[4-(dimethylamino)phenyl]alkyl-2-oxindole derivatives and their effects on neuronal cell death. Bioorg Med Chem Lett 2017; 27:4457-4461. [DOI: 10.1016/j.bmcl.2017.08.005] [Citation(s) in RCA: 12] [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] [Received: 06/15/2017] [Revised: 07/31/2017] [Accepted: 08/03/2017] [Indexed: 10/19/2022]
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21
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Koyama H, Ikenuma H, Toda H, Kondo G, Hirano M, Kato M, Abe J, Yamada T, Wakabayashi T, Ito K, Natsume A, Suzuki M. Synthesis of PET probe O 6-[(3-[ 11C]methyl)benzyl]guanine by Pd 0-mediated rapid C-[ 11C]methylation toward imaging DNA repair protein O 6-methylguanine-DNA methyltransferase in glioblastoma. Bioorg Med Chem Lett 2017; 27:1892-1896. [PMID: 28363750 DOI: 10.1016/j.bmcl.2017.03.045] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Revised: 02/28/2017] [Accepted: 03/17/2017] [Indexed: 12/31/2022]
Abstract
O6-Benzylguanine (O6-BG) is a substrate of O6-methylguanine-DNA methyltransferase (MGMT), which is involved in drug resistance of chemotherapy in the majority of glioblastoma multiform. For clinical diagnosis, it is hoped that the MGMT expression level could be determined by a noninvasive method to understand the detailed biological properties of MGMT-specific tumors. We synthesized 11C-labeled O6-[(3-methyl)benzyl]guanine ([11C]mMeBG) as a positron emission tomography probe. Thus, a mixed amine-protected stannyl precursor, N9-(tert-butoxycarbonyl)-O6-[3-(tributylstannyl)benzyl]-N2-(trifluoroacetyl)guanine, was subjected to rapid C-[11C]methylation under [11C]CH3I/[Pd2(dba)3]/P(o-CH3C6H4)3/CuCl/K2CO3 in NMP, followed by quick deprotection with LiOH/H2O, giving [11C]mMeBG with total radioactivity of 1.34GBq and ≥99% radiochemical and chemical purities.
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Affiliation(s)
- Hiroko Koyama
- Division of Regeneration and Advanced Medical Science, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan.
| | - Hiroshi Ikenuma
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Hiroshi Toda
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Goro Kondo
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Masaki Hirano
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Masaya Kato
- Division of Regeneration and Advanced Medical Science, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu 501-1194, Japan
| | - Junichiro Abe
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Takashi Yamada
- Department of Food and Nutritional Science, College of Bioscience and Biotechnology, Chubu University, Matsumoto-cho, Kasugai, Aichi 487-8501, Japan
| | - Toshihiko Wakabayashi
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Kengo Ito
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan
| | - Atsushi Natsume
- Department of Neurosurgery, Nagoya University School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan.
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, 7-430 Morioka-cho, Obu-shi, Aichi 474-8511, Japan.
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22
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Furuta K, Mizuno Y, Maeda M, Koyama H, Hirata Y. Synthesis of 3-Arylmethyl-2-oxindole Derivatives and Their Effects on Neuronal Cell Death. Chem Pharm Bull (Tokyo) 2017; 65:1093-1097. [DOI: 10.1248/cpb.c17-00627] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Kyoji Furuta
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University
- Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University
- Regeneration and Advanced Medical Sciences, Graduate School of Medicine, Gifu University
| | - Yosuke Mizuno
- Regeneration and Advanced Medical Sciences, Graduate School of Medicine, Gifu University
| | - Masahide Maeda
- Regeneration and Advanced Medical Sciences, Graduate School of Medicine, Gifu University
| | - Hiroko Koyama
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University
- Regeneration and Advanced Medical Sciences, Graduate School of Medicine, Gifu University
| | - Yoko Hirata
- Department of Chemistry and Biomolecular Science, Faculty of Engineering, Gifu University
- Field of Biological Molecular Sciences, United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University
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Mochizuki Y, Suzuki R, Teshima T, Matsumoto H, Panthee N, Sugiura S, Hisada T, Koyama H. Usefulness of dyssynchrony indices based on two-dimensional speckle tracking echocardiography in a canine model of left bundle branch block. J Vet Cardiol 2016; 18:358-366. [DOI: 10.1016/j.jvc.2016.07.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Revised: 05/05/2016] [Accepted: 07/29/2016] [Indexed: 10/21/2022]
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Hasegawa K, Saiura A, Oba M, Aosasa S, Tanaka N, Takayama T, Hashiguchi Y, Bandai Y, Sakamoto H, Yamagata S, Aoyanagi N, Kaneko H, Koyama H, Miyagawa S, Yamamoto J, Mise Y, Shinozaki E, Yoshida S, Watanabe T, Kokudo N. A multicenter phase II trial to evaluate the efficacy of mFOLFOX6 + cetuximab as induction chemotherapy to achieve R0 surgical resection for advanced colorectal liver metastases (NEXTO trial). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw370.32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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25
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Suzuki R, Mochizuki Y, Yoshimatsu H, Ohkusa T, Teshima T, Matsumoto H, Koyama H. Myocardial torsional deformations in cats with hypertrophic cardiomyopathy using two-dimensional speckle-tracking echocardiography. J Vet Cardiol 2016; 18:350-357. [PMID: 27515828 DOI: 10.1016/j.jvc.2016.06.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 05/11/2016] [Accepted: 06/20/2016] [Indexed: 11/30/2022]
Abstract
OBJECTIVES The objective of our study was to quantitatively measure systolic torsional deformations in cats with hypertrophic cardiomyopathy (HCM) and in controls. ANIMALS Twenty-six client-owned cats with HCM and 14 healthy cats. HCM cats were categorized based on their symptoms (asymptomatic and symptomatic) and with or without left ventricular outflow tract obstruction (obstructive and non-obstructive). METHODS The cats were examined for myocardial deformations using two-dimensional speckle-tracking echocardiography and were evaluated for peak systolic rotation and the rotation rate at each basal and apical view. Cats were also evaluated for the peak systolic torsion and torsion rate. RESULTS The peak systolic apical rotation and torsion were higher in asymptomatic and symptomatic cats with HCM than in control cats. Also, the peak systolic apical rotation, apical rotation rate, torsion, and torsion rate were higher in cats with obstructive HCM than in control cats. CONCLUSIONS Myocardial torsional deformations assessed by two-dimensional speckle-tracking echocardiography may be useful for evaluating compensatory myocardial function of HCM.
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Affiliation(s)
- R Suzuki
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan.
| | - Y Mochizuki
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan
| | - H Yoshimatsu
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan
| | - T Ohkusa
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan
| | - T Teshima
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan
| | - H Matsumoto
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan
| | - H Koyama
- Laboratory of Veterinary Internal Medicine, Division of Therapeutic Sciences 1, Department of Veterinary Clinical Medicine, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, 180-8602, Japan
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Abstract
A carcinoid tumor was found as a solitary soft mass in the wall of the rectum adjacent to the anorectal junction in an adult Holstein cow. Microscopically, the tumor involved the submucosa and partly invaded the muscular layer. It consisted of a compact arrangement of a great number of large polygonal cells and a small number of small dark cells, some of which showed argyrophilia (Grimelius positive). Immunohistochemically, both types of tumor cells were positive for vimentin, keratin, and S-100 protein and weakly positive for neuron-specific enolase (NSE), whereas they were negative for some endocrine markers such as chromogranin A, insulin, glucagon, somatostatin, serotonin, adrenocorticotropic hormone, and calcitonin. Electron microscopy revealed membrane-bound secretory granules in the cytoplasm of some small dark cells. In such a poorly differentiated carcinoid, the morphologic characteristics of the small dark cells were strong evidence for the diagnosis. This is the first description of a poorly differentiated carcinoid developing in the rectum of a cow.
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Affiliation(s)
- M Michishita
- Department of Veterinary Pathology, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, Musashino, Tokyo 180-8602, Japan
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27
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Soeda Y, Yoshikawa M, Almeida OFX, Sumioka A, Maeda S, Osada H, Kondoh Y, Saito A, Miyasaka T, Kimura T, Suzuki M, Koyama H, Yoshiike Y, Sugimoto H, Ihara Y, Takashima A. Toxic tau oligomer formation blocked by capping of cysteine residues with 1,2-dihydroxybenzene groups. Nat Commun 2015; 6:10216. [PMID: 26671725 PMCID: PMC4703892 DOI: 10.1038/ncomms10216] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 11/13/2015] [Indexed: 12/26/2022] Open
Abstract
Neurofibrillary tangles, composed of hyperphosphorylated tau fibrils, are a pathological hallmark of Alzheimer's disease; the neurofibrillary tangle load correlates strongly with clinical progression of the disease. A growing body of evidence indicates that tau oligomer formation precedes the appearance of neurofibrillary tangles and contributes to neuronal loss. Here we show that tau oligomer formation can be inhibited by compounds whose chemical backbone includes 1,2-dihydroxybenzene. Specifically, we demonstrate that 1,2-dihydroxybenzene-containing compounds bind to and cap cysteine residues of tau and prevent its aggregation by hindering interactions between tau molecules. Further, we show that orally administered DL-isoproterenol, an adrenergic receptor agonist whose skeleton includes 1,2-dihydroxybenzene and which penetrates the brain, reduces the levels of detergent-insoluble tau, neuronal loss and reverses neurofibrillary tangle-associated brain dysfunction. Thus, compounds that target the cysteine residues of tau may prove useful in halting the progression of Alzheimer's disease and other tauopathies. Aggregation of microtubule associated protein tau is one of cause of neuronal loss in tauopathies including Alzheimer's disease. Here, the authors show that compounds with a 1,2-dihydroxybenzene skeleton can modify cysteine residues in tau and block toxic tau aggregation.
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Affiliation(s)
- Yoshiyuki Soeda
- Department of Aging Neurobiology, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Misato Yoshikawa
- Department of Aging Neurobiology, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Osborne F X Almeida
- Department of Stress Neurology and Neurogenesis, Max Planck Institute of Psychiatry, Kraepelinstrasse, 2-10, Munich 80804, Germany
| | - Akio Sumioka
- Department of Aging Neurobiology, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Sumihiro Maeda
- Gladstone Institute of Neurological Disease, University of California, San Francisco, California 94158-2261, USA
| | - Hiroyuki Osada
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science (CSRS), RIKEN, Wako, Saitama 351-0198, Japan.,Antibiotics Laboratory, Advanced Science Institute, RIKEN, Wako, Saitama 351-0198, Japan
| | - Yasumitsu Kondoh
- Chemical Biology Research Group, RIKEN Center for Sustainable Resource Science (CSRS), RIKEN, Wako, Saitama 351-0198, Japan.,Antibiotics Laboratory, Advanced Science Institute, RIKEN, Wako, Saitama 351-0198, Japan
| | - Akiko Saito
- Graduate School of Engineering, Osaka Electro-communication University (OECU), 18-8 Hatsu-cho, Osaka 572-8530, Japan
| | - Tomohiro Miyasaka
- Department of Neuropathology, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan
| | - Tetsuya Kimura
- Department of Aging Neurobiology, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Masaaki Suzuki
- Department of Clinical and Experimental Neuroimaging, Center for Development of Advanced Medicine for Dementia, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Hiroko Koyama
- Division of Regeneration and Advanced Medical Science, Gifu University Graduate School of Medicine, Gifu 501-1194, Japan
| | - Yuji Yoshiike
- Alzheimer's Disease Project Team, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
| | - Hachiro Sugimoto
- Laboratory of Structural Neuropathology, Graduate School of Brain Science, Doshisha University, Kizugawa, Kyoto 619-0225, Japan
| | - Yasuo Ihara
- Department of Neuropathology, Faculty of Life and Medical Sciences, Doshisha University, Kyotanabe, Kyoto 610-0394, Japan.,Laboratory of Cognition and Aging, Doshisha University, Kizugawa 619-0225, Japan
| | - Akihiko Takashima
- Department of Aging Neurobiology, National Center for Geriatrics and Gerontology, Obu, Aichi 474-8511, Japan
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Uozumi M, Sanui M, Komuro T, Iizuka Y, Kamio T, Koyama H, Mouri H, Masuyama T, Ono K. Interruption of of enteral nutrition in the intensive care unit: a single center survey. Intensive Care Med Exp 2015. [PMCID: PMC4798486 DOI: 10.1186/2197-425x-3-s1-a289] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Koyama H, Tahara H, Shoji T, Nishizawa Y, Inaba M, Otani S, Yanagisawa M, Ishiguro Y, Takanashi N, Morii H. Uremic serum contains humoral factor(s) larger than fifty kilodaltons which suppresses endothelin production in cultured endothelial cells. Contrib Nephrol 2015; 90:111-5. [PMID: 1959336 DOI: 10.1159/000420132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Direct effects of human uremic serum on the production of endothelin-1 in cultured porcine endothelial cells were examined in this study. Uremic serum decreased the level of monomeric endothelin-1 secreted into the culture medium by endothelial cells. This effect occurred at a transcriptional step because uremic serum decreased the endothelin-1 mRNA level in those cells. For the partial characterization of this inhibitory activity, uremic serum was fractionated with a centricut column. Uremic serum contains humoral factor(s) larger than 50 kD which suppress the endothelin-1 mRNA level in cultured endothelial cells.
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Affiliation(s)
- H Koyama
- Second Department of Internal Medicine, Osaka City University Medical School, Japan
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Nagata Y, Inaba M, Imanishi Y, Okazaki H, Yamada S, Mori K, Shoji S, Koyama H, Okuno S. Increased undercarboxylated osteocalcin/intact osteocalcin ratio in patients undergoing hemodialysis. Osteoporos Int 2015; 26:1053-61. [PMID: 25403902 DOI: 10.1007/s00198-014-2954-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Accepted: 10/27/2014] [Indexed: 01/24/2023]
Abstract
UNLABELLED Serum undercarboxylated osteocalcin (ucOC)/intact osteocalcin (iOC) ratio increased >1.0 in the patients undergoing hemodialysis, particularly in those with high bone turnover state. Consequently, serum ucOC/iOC ratio might lose its significance as a bone metabolic marker to indicate vitamin K deficiency in hemodialysis patients. INTRODUCTION Serum intact osteocalcin (iOC), undercarboxylated OC (ucOC), and the ucOC/iOC ratio are considered clinically relevant indices in pre-dialysis chronic kidney disease (CKD) and hemodialysis (HD) patients, despite their accumulation in uremic serum. METHODS Serum iOC and ucOC were measured along with serum intact parathyroid hormone (iPTH), bone alkaline phosphatase (BAP), and tartrate-resistant acid phosphatase (TRACP)-5b in 89 pre-dialysis CKD and 189 HD patients. RESULTS Serum iOC and ucOC showed significantly negative correlations with estimated glomerular filtration rate in pre-dialysis CKD patients, although serum ucOC/iOC ratio did not correlate. Serum ucOC was significantly greater in HD patients than in pre-dialysis CKD patients, while serum iOC did not differ significantly, resulting in serum ucOC/iOC ratio >1.0 in 135 (71.4%) out of 189 HD patients. HD patients with high serum ucOC/iOC ratio (>1.0) had a significantly younger age and significantly higher values of body mass index, serum creatinine, albumin, phosphate, iPTH, and TRACP-5b than those with low ucOC/iOC ratio (≤ 1.0). The baseline iPTH and P1NP correlated with the changes of the ucOC/iOC ratio during the 2 days of the inter-dialytic period. Multivariate analysis showed that log [ucOC/iOC] in HD patients was significantly associated with log [iPTH], log [BAP], or log [TRACP-5b]. CONCLUSIONS Serum ucOC/iOC ratio >1.0 was observed in as high as 71.4% of HD patients, preferentially with high bone turnover state, in comparison with pre-dialysis CKD patients. These data suggested that serum ucOC/iOC ratio might lose its significance as a bone metabolic marker to indicate vitamin K deficiency in HD patients.
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Affiliation(s)
- Y Nagata
- Department of Metabolism, Endocrinology and Molecular Medicine, Osaka City University Graduate School of Medicine, 1-4-3, Asahi-machi, Abeno-ku, Osaka, 545-8585, Japan
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Odani W, Urata K, Okuda M, Okuma S, Koyama H, Pack CG, Fujiwara K, Nojima T, Kinjo M, Kawai-Noma S, Taguchi H. Peptide sequences converting polyglutamine into a prion in yeast. FEBS J 2014; 282:477-90. [PMID: 25406629 DOI: 10.1111/febs.13152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Revised: 11/09/2014] [Accepted: 11/17/2014] [Indexed: 11/29/2022]
Abstract
Amyloids are ordered protein aggregates composed of cross-β sheet structures. Amyloids include prions, defined as infectious proteins, which are responsible for mammalian transmissible spongiform encephalopathies, and fungal prions. Although the conventional view is that typical amyloids are associated with nontransmissible mammalian neurodegenerative diseases such as Alzheimer's disease, increasing evidence suggests that the boundary between transmissible and nontransmissible amyloids is ambiguous. To clarify the mechanism underlying the difference in transmissibility, we investigated the dynamics and the properties of polyglutamine (polyQ) amyloids in yeast cells, in which the polyQ aggregates are not transmissible but can be converted into transmissible amyloids. We found that polyQ had an increased tendency to form aggregates compared to the yeast prion Sup35. In addition, we screened dozens of peptides that converted the nontransmissible polyQ to transmissible aggregates when they flanked the polyQ stretch, and also investigated their cellular dynamics aiming to understand the mechanism of transmission.
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Affiliation(s)
- Wataru Odani
- Department of Medical Genome Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba, Japan
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Tokunaga S, Tachihara M, Koyama H, Ejima Y, Shinke H, Tamura D, Otera H, Kobayashi K, Funada Y, Sasaki R, Ohno Y, Nishimura Y. A Retrospective Study of Risk Factors for Radiation Pneumonitis of Definitive Chemoradiotherapy for the Treatment of Locally Advanced Lung Cancer By Emphysema Quantification. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu348.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Suzuki M, Takashima-Hirano M, Ishii H, Watanabe C, Sumi K, Koyama H, Doi H. Synthesis of 11C-labeled retinoic acid, [11C]ATRA, via an alkenylboron precursor by Pd(0)-mediated rapid C-[11C]methylation. Bioorg Med Chem Lett 2014; 24:3622-5. [DOI: 10.1016/j.bmcl.2014.05.041] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2014] [Revised: 05/06/2014] [Accepted: 05/08/2014] [Indexed: 11/30/2022]
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Zhang Z, Doi H, Koyama H, Watanabe Y, Suzuki M. Efficient syntheses of [¹¹C]zidovudine and its analogs by convenient one-pot palladium(0)-copper(I) co-mediated rapid C-[¹¹C]methylation. J Labelled Comp Radiopharm 2014; 57:540-9. [PMID: 24992010 DOI: 10.1002/jlcr.3213] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Revised: 05/28/2014] [Accepted: 05/29/2014] [Indexed: 12/17/2022]
Abstract
The nucleosides zidovudine (AZT), stavudine (d4T), and telbivudine (LdT) are approved for use in the treatment of human immunodeficiency virus (HIV) and hepatitis B virus (HBV) infections. To promote positron emission tomography (PET) imaging studies on their pharmacokinetics, pharmacodynamics, and applications in cancer diagnosis, a convenient one-pot method for Pd(0)-Cu(I) co-mediated rapid C-C coupling of [(11)C]methyl iodide with stannyl precursor was successfully established and applied to synthesize the PET tracers [(11)C]zidovudine, [(11)C]stavudine, and [(11)C]telbivudine. After HPLC purification and radiopharmaceutical formulation, the desired PET tracers were obtained with high radioactivity (6.4-7.0 GBq) and specific radioactivity (74-147 GBq/µmol) and with high chemical (>99%) and radiochemical (>99.5%) purities. This one-pot Pd(0)-Cu(I) co-mediated rapid C-[(11)C]methylation also worked well for syntheses of [methyl-(11)C]thymidine and [methyl-(11)C]4'-thiothymidine, resulting twice the radioactivity of those prepared by a previous two-pot method. The mechanism of one-pot Pd(0)-Cu(I) co-mediated rapid C-[(11)C]methylation was also discussed.
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Affiliation(s)
- Zhouen Zhang
- Division of Bio-function Dynamics Imaging, RIKEN Center for Life Science Technologies (CLST), Kobe, Hyogo, 650-0047, Japan; RIKEN Center for Molecular Imaging Science, Kobe, Hyogo, 650-0047, Japan
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Suzuki M, Doi H, Koyama H, Zhang Z, Hosoya T, Onoe H, Watanabe Y. Pd0-Mediated Rapid Cross-Coupling Reactions, the RapidC-[11C]Methylations, Revolutionarily Advancing the Syntheses of Short-Lived PET Molecular Probes. CHEM REC 2014; 14:516-41. [DOI: 10.1002/tcr.201400002] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Indexed: 11/12/2022]
Affiliation(s)
- Masaaki Suzuki
- National Center for Geriatrics and Gerontology; 35 Gengo Morioka-cho Obu-shi Aichi 474-8511 Japan
| | - Hisashi Doi
- Division of Bio-Function Dynamics Imaging; Riken Center for Life Science Technologies (CLST); 6-7-3 Minatojima-minamimachi Chuo-ku Kobe 650-0047 Japan
| | - Hiroko Koyama
- Division of Regeneration and Advanced Medical Science; Graduate School of Medicine; Gifu University; 1-1 Yanagido Gifu 501-1194 Japan
| | - Zhouen Zhang
- Division of Bio-Function Dynamics Imaging; Riken Center for Life Science Technologies (CLST); 6-7-3 Minatojima-minamimachi Chuo-ku Kobe 650-0047 Japan
| | - Takamitsu Hosoya
- Division of Regeneration and Advanced Medical Science; Graduate School of Medicine; Gifu University; 1-1 Yanagido Gifu 501-1194 Japan
| | - Hirotaka Onoe
- Division of Bio-Function Dynamics Imaging; Riken Center for Life Science Technologies (CLST); 6-7-3 Minatojima-minamimachi Chuo-ku Kobe 650-0047 Japan
| | - Yasuyoshi Watanabe
- Division of Bio-Function Dynamics Imaging; Riken Center for Life Science Technologies (CLST); 6-7-3 Minatojima-minamimachi Chuo-ku Kobe 650-0047 Japan
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Koyama H, Ohno Y, Nishio M, Takenaka D, Yoshikawa T, Matsumoto S, Seki S, Maniwa Y, Ito T, Nishimura Y, Sugimura K. Diffusion-weighted imaging vs STIR turbo SE imaging: capability for quantitative differentiation of small-cell lung cancer from non-small-cell lung cancer. Br J Radiol 2014; 87:20130307. [PMID: 24786147 DOI: 10.1259/bjr.20130307] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
OBJECTIVE To compare the capability of differentiation of small-cell lung cancer (SCLC) from non-SCLC (NSCLC) between diffusion-weighted imaging (DWI) and short tau inversion recovery (STIR) turbo spin-echo imaging. METHODS The institutional review board of Kobe University Hospital, Kobe, Japan, approved this study, and written informed consent was obtained from each patient. 49 patients with NSCLC (30 males and 19 females; mean age, 66.8 years) and 7 patients with SCLC (5 males and 2 females; mean age, 68.6 years) enrolled and underwent DWI and STIR. To quantitatively differentiate SCLC from NSCLC, apparent diffusion coefficient (ADC) values on DWI and contrast ratios (CRs) between cancer and muscle on STIR were evaluated. ADC values and CRs were then compared between the two cell types by Mann-Whitney's U-tests, and the diagnostic performances were compared by McNemar's test. RESULTS There were significant differences of mean ADC values (p < 0.001) and mean CRs (p = 0.003). With adopted threshold values, the specificity (85.7%) and accuracy (85.7%) of DWI were higher than those of STIR (specificity, 63.3%; p = 0.001 and accuracy, 66.1%; p = 0.001). In addition, the accuracy of combination of both indexes (94.6%; p = 0.04) could significantly improve as compared with DWI alone. CONCLUSION DWI is more useful for the differentiation of SCLC from NSCLC than STIR, and their combination can significantly improve the accuracy in this setting. ADVANCES IN KNOWLEDGE Pulmonary MRI, including DWI and STIR, had a potential of the suggestion of the possibility as SCLC.
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Affiliation(s)
- H Koyama
- 1 Division of Radiology, Department of Radiology, Kobe University Graduate School of Medicine, Kobe, Japan
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Suzuki R, Matsumoto H, Teshima T, Mochizuki Y, Koyama H. Dobutamine stress echocardiography for assessment of systolic function in dogs with experimentally induced mitral regurgitation. J Vet Intern Med 2014; 28:386-92. [PMID: 24433339 PMCID: PMC4858017 DOI: 10.1111/jvim.12293] [Citation(s) in RCA: 10] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2013] [Revised: 11/06/2013] [Accepted: 11/26/2013] [Indexed: 01/08/2023] Open
Abstract
Background Systolic dysfunction is associated with poor outcomes in dogs with myxomatous mitral valve disease. However, assessment of systolic variables by conventional echocardiographic methods is difficult in these dogs because of mitral regurgitation (MR). Hypothesis We hypothesized that assessment of systolic function by dobutamine stress may identify systolic dysfunction in dogs with MR, and that 2‐dimensional speckle‐tracking echocardiography (2D‐STE) could quantitatively evaluate myocardial function. Animals Anesthetized dogs with experimentally induced MR. Methods Dogs were examined for systolic myocardial deformations using 2D‐STE during dobutamine infusion before and 3 and 6 months after MR induction. We evaluated peak systolic rotation and rotation rate in each basal and apical view; peak systolic torsion and torsion rate were also calculated. Results Invasive peak positive first derivatives of left ventricular pressure (dp/dt) were significantly decreased in dogs 6 months after induction of MR compared with pre‐MR results. After 3 and 6 months of MR, dogs had diminished peak systolic torsion values and torsion rates in response to dobutamine infusion compared with pre‐MR results (3 months, P < .001 and P = .006; 6 months, P = .003 and P = .021). These results were significantly correlated with overall invasive dp/dt (r = 0.644, P < .001; r = 0.696, P < .001). Conclusions and Clinical Importance Decreased torsion during dobutamine infusion in dogs with MR may reflect latent systolic dysfunction. Dobutamine infusion, therefore, may be useful for the assessment of systolic function in dogs with MR.
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Affiliation(s)
- R Suzuki
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, Tokyo, Japan
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Takehisa M, Kondo S, Imai K, Dochi O, Koyama H. 140 THE EFFECTS OF INTERVALS OF MECHANICAL VIBRATION DURING IN VITRO CULTURE ON THE DEVELOPMENT OF BOVINE EMBRYO DERIVED FROM LOW-QUALITY OOCYTES. Reprod Fertil Dev 2014. [DOI: 10.1071/rdv26n1ab140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Mechanical vibration enhances the cytoplyasmic maturation of in vitro-matured (IVM) pig oocytes (Mizobe et al. 2010 J. Reprod. Dev. 56, 285–290), as well as the development of in vitro-cultured (IVC) bovine embryos (Fujita et al. 2010 Rakuno Gakuen University Graduation thesis,1–36). In this study, the effects of intervals of mechanical vibration during in vitro culture, after IVF, on the development of embryos derived from low-quality oocytes were examined. Cumulus-oocyte complexes (COC) were collected by aspiration of ovarian follicles (diameter = 2 to 6 mm) obtained from a local abattoir. In this experiment, only grade 3 oocytes (i.e. those with one layer or partially remaining cumulus cells and normal cytoplasm) were used. Groups of 20 COC were matured in 100-μL droplets of in vitro TCM-199 supplemented with 5% calf serum and 0.02 AU mL–1 of FSH at 38.5°C under an atmosphere of 5% CO2 in air for 20 h. Matured COC were inseminated with 5 × 106 sperms mL–1 for 18 h. After 18 h of gamete co-culture, the presumptive zygotes were cultured in CR1aa medium supplemented with 5% calf serum at 38.5°C under an atmosphere of 5% O2, 5% CO2, and 90% N2 for 9 days (fertilization = Day 0). Presumptive zygotes were cultured in vitro without mechanical vibration (control; n = 467) and with mechanical vibration for 5 s at 5 min (n = 180), 10 min (n = 180), 15 min (n = 180), and 60 min (n = 200) for 9 days. Embryo development was evaluated for cleavage and blastocyst rates, on Days 3 and 7 to 9 after IVF, respectively. The cleavage and blastocyst formation rates were analysed by the chi-squared test. Vibration at 15-min intervals increased (P < 0.05) cleavage rate compared to 5 min, 60 min, and control (control: 66.2 ± 22.1%; 5 min: 49.4 ± 10.2%; 10 min: 70.0 ± 7.7%; 15 min: 86.2 ± 6.6%; and 60 min: 64.0 ± 8.5%).The highest (P < 0.05) blastocyst rate among the experimental groups was found with 15-min intervals for vibration (control: 21.6 ± 9.2%; 5 min: 15.0 ± 5.3%; 10 min: 22.8 ± 1.8%; 60 min: 21.5 ± 5.0%). These results indicated that the cleavage and blastocyst formation rates of IVM-IVF-IVC bovine embryos derived from low-quality oocytes can be improved by physical stimulus during IVC. In addition, it was shown that 15-min intervals of mechanical vibration elicited the highest benefit for the development of embryos.
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Syoji K, Imai K, Koyama H, Dochi O. 133 EFFECT OF PROGESTERONE SUPPLEMENTATION OF MATURATION MEDIUM ON THE DEVELOPMENT OF IN VITRO-MATURED-IN VITRO-FERTILIZED-IN VITRO-CULTURED BOVINE EMBRYOS. Reprod Fertil Dev 2014. [DOI: 10.1071/rdv26n1ab133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The objective of this study was to investigate whether progesterone (P4) supplementation to in vitro maturation (IVM) medium could affect the competence of bovine oocyte to develop into blastocysts in vitro. Cumulus–oocyte complexes (COC) were collected by aspiration of ovarian follicles (2 to 6 mm in diameter) obtained from a local abattoir. The COC were matured for 20 h in TCM-199 supplemented with 5% calf serum and 0.02 AU mL–1 FSH at 38.5° in an atmosphere of 5% CO2 in air. After 18 h of gamete co-culture (5 × 106 sperms mL–1), presumptive zygotes were cultured in CRlaa containing 5% calf serum at 38.5°C in an atmosphere of 5% CO2, 5% O2, and 90% N2 for 9 days (fertilization = Day 0). Progesterone was added to the IVM medium 10 h after the start of the culture (1 μg group = 1 μg mL–1 of P4; 5 μg group = 5 μg mL–1 of P4; control group = no P4). The maturation (MII) rates were investigated after 20 h of starting the IVM culture. After maturation, the COC were denuded mechanically, and a part of the oocytes were mounted on slides, fixed with aceto-alcohol (1 : 3) solution for 48 h, stained with aceto-orcein, and observed under a phase-contrast microscope to determine their nuclear status (1 μg group: n = 32; 5 μg group: n = 28; control group: n = 31). The remaining COC were used for IVF. The cleavage rates were investigated on day 2, and the blastocyst formation rates were investigated on Days 7 to 9, respectively (1 μg group: n = 264; 5 μg group: n = 274; control group: n = 277). The blastocysts from Day 7 were used for differential staining of the inner cell mass (ICM) and trophectoderm cells (TE). The total cell numbers, ICM, and TE in the blastocysts were counted (1 μg group: n = 28; 5 μg group: n = 24; control group: n = 24). The rates of MII, cleavage, and blastocyst formation were expressed and analysed by the chi-squared test. Each set of cell numbers (mean ± standard error) was analysed by the unpaired t-test. The MII rate in the control group (76.7%) was significantly lower (P < 0.05) than that in the 1 μg group (93.8%). The cleavage rate in the 1 μg group (85.6%) was significantly higher (P < 0.05) than those in the control group (74.7%) and 5 μg group (77.4%). Further, the blastocyst formation rate in the 1 μg group (47.7%) and 5 μg group (43.4%) were significantly higher (P < 0.05) than that in the control group (35.0%). The ICM numbers (mean ± s.e.) were 39.5 ± 13.8 to 36.2 ± 8.9, the TE numbers were 74.4 ± 22.4 to 66.2 ± 12.9, the total cell numbers of blastocysts were 110.6 ± 28.2 to 103.0 ± 13.8. There was no significant difference in cell numbers among the groups. These results indicate that the cleavage and blastocyst formation rates can be improved by the addition of 1 μg mL–1 of P4 to the maturation medium.
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Koyama H, Yoshida H, Hino K. [Diagnosis of a giant abdominal nodule triggered by abdominal pain]. Nihon Shokakibyo Gakkai Zasshi 2013; 110:1495-1499. [PMID: 24350388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
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Suzuki R, Matsumoto H, Teshima T, Mochizuki Y, Koyama H. Left ventricular geometrical differences in dogs with various stages of myxomatous mitral valve disease. J Small Anim Pract 2013; 54:234-9. [DOI: 10.1111/jsap.12058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- R. Suzuki
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho Musashino-shi Tokyo 180-8602 Japan
| | - H. Matsumoto
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho Musashino-shi Tokyo 180-8602 Japan
| | - T. Teshima
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho Musashino-shi Tokyo 180-8602 Japan
| | - Y. Mochizuki
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho Musashino-shi Tokyo 180-8602 Japan
| | - H. Koyama
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho Musashino-shi Tokyo 180-8602 Japan
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Teshima T, Matsumoto H, Michishita M, Takahashi K, Koyama H. Multiple inflammatory gastric polyps treated by endoscopic polypectomy with argon plasma coagulation in a dog. J Small Anim Pract 2013; 54:265-8. [DOI: 10.1111/jsap.12032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Teshima
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho, Musashino-shi Tokyo 180-8602 Japan
| | - H. Matsumoto
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho, Musashino-shi Tokyo 180-8602 Japan
| | - M. Michishita
- Division of Veterinary Pathology, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho, Musashino-shi Tokyo 180-8602 Japan
| | - K. Takahashi
- Division of Veterinary Pathology, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho, Musashino-shi Tokyo 180-8602 Japan
| | - H. Koyama
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine; Nippon Veterinary and Life Science University; 1-7-1 Kyonan-cho, Musashino-shi Tokyo 180-8602 Japan
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Oba M, Miyashita S, Nishii R, Koiwa M, Koyama H, Ambrose DJ, Dochi O. Short communication: effects of serum obtained from dairy cows with low or high body condition score on in vitro embryo development. J Dairy Sci 2013; 96:1668-71. [PMID: 23332858 DOI: 10.3168/jds.2012-5886] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 11/28/2012] [Indexed: 11/19/2022]
Abstract
The objective of the study was to determine whether the serum obtained from animals differing in body condition score (BCS) affects in vitro embryo development. After in vitro fertilization, serum obtained from dairy cows of either low (L-BCS; 2.1 ± 0.14 on a scale of 1 to 5) or high BCS (H-BCS; 4.0 ± 0.0), or commercially available bovine serum (control) was added at 5% concentration to the in vitro culture medium. Use of serum obtained from H-BCS cows increased the cleavage rates compared with control serum at both 24 and 48 h after in vitro fertilization (78.3 vs. 71.9% and 79.9 vs. 75.1%, respectively), whereas use of serum obtained from L-BCS cows increased the blastocyst rate compared with control serum at 7d (23.8 vs. 19.1%), but this difference was not evident at 8 or 9 d after in vitro fertilization. As nonesterified fatty acid concentrations were highest in control serum, followed by serum from L-BCS and H-BCS cows (621, 559, and 272 μEq/L, respectively), a high concentration of nonesterified fatty acids might adversely affect the very early stages of embryo development, and its negative effects might be greater immediately after fertilization compared with developmental stages after morula formation. Our findings also indicate that factors promoting early stage embryo development do not necessarily promote blastocyst development. Serum obtained from animals under different physiological conditions may be used for in vitro embryo culture to study the effects of nutritional management of dairy cattle on embryo development.
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Affiliation(s)
- M Oba
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Canada T6G 2P5.
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Koyama H, Zhang Z, Ijuin R, Siqin, Son J, Hatta Y, Ohta M, Wakao M, Hosoya T, Doi H, Suzuki M. Pd0-mediated rapid coupling of methyl iodide with excess amounts of benzyl- and cinnamylboronic acid esters: efficient method for incorporation of positron-emitting 11C radionuclide into organic frameworks by coupling between two sp3-hybridized carbons. RSC Adv 2013. [DOI: 10.1039/c3ra40815a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
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Suzuki R, Matsumoto H, Teshima T, Koyama H. Noninvasive clinical assessment of systolic torsional motions by two-dimensional speckle-tracking echocardiography in dogs with myxomatous mitral valve disease. J Vet Intern Med 2012; 27:69-75. [PMID: 23278918 DOI: 10.1111/jvim.12024] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 09/13/2012] [Accepted: 10/24/2012] [Indexed: 10/27/2022] Open
Abstract
BACKGROUND Left ventricular torsional motion plays an important role for effective pump function. However, noninvasive clinical assessment of torsional deformations by two-dimensional speckle-tracking echocardiography (2D-STE) in dogs with myxomatous mitral valve disease (MMVD) has not been reported. HYPOTHESIS Left ventricular torsion is determined by the native orientation of the helical myocardial fibers, such that it might provide better assessment of myocardial function than conventional methods. ANIMALS Sixty-seven client-owned dogs with MMVD were classified into 3 classes based on the International Small Animal Cardiac Health Council classification and 16 weight- and age-matched healthy dogs. METHODS Dogs were examined for myocardial deformations by 2D-STE and were evaluated for peak systolic rotation and rotation rate at each basal and apical view. Dogs also were evaluated for peak systolic torsion and torsion rate. RESULTS Peak systolic torsion was higher in class II than in class I (P < .001) dogs. Peak systolic torsion was lower in class III than in class II (P = .001) dogs and controls (P = .003). CONCLUSIONS AND CLINICAL IMPORTANCE Torsional deformations assessed by 2D-STE differed among clinical classes of MMVD. Myocardial torsional deformations by 2D-STE may provide more detailed assessment of contractile function in dogs with MMVD.
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Affiliation(s)
- R Suzuki
- Division of Veterinary Internal Medicine, Department of Veterinary Science, Faculty of Veterinary Medicine, Nippon Veterinary and Life Science University, Tokyo, Japan.
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Koyama H, Ohno Y, Nishio M, Takenaka D, Yoshikawa T, Matsumoto S, Nishimura Y, Sugimura K. Three-dimensional airway lumen volumetry: comparison with bronchial wall area and parenchymal densitometry in assessment of airway obstruction in pulmonary emphysema. Br J Radiol 2012; 85:1525-32. [PMID: 22932062 DOI: 10.1259/bjr/22602417] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The purpose of this study was to compare three-dimensional airway lumen volumetry with bronchial wall area and parenchymal densitometry in the assessment of airway obstruction in pulmonary emphysema. METHODS 56 patients, who were smokers, underwent CT examination and pulmonary function tests (PFTs). For quantitative assessments, the following parameters were computationally calculated: (1) percentage of voxels -950, -960 and -970 HU in the lung (%LAA(-950), %LAA(-960) and %LAA(-970), respectively); (2) percentage of partial bronchi luminal volumes per total luminal volumes (LV(main), main and distal bronchial volume/total luminal volume; LV(lobe), lobar and distal bronchial volume/total luminal volume); and (3) mean wall area percentages of segmental bronchi of the right apical and left apicoposterior segment (WA%(seg)) and of subsegmental bronchi (WA%(sub)) in the upper lobes. These parameters were correlated with PFTs and statistically compared between a chronic obstructive pulmonary disease (COPD) group [forced expiratory volume in 1 s (FEV1)/forced vital capacity (FVC)<70] and a non-COPD group. RESULTS FEV1, maximum mid-expiratory flow rate and forced expiratory flow at 25% vital capacity had significant correlation with LV(main) (r>0.53, p<0.0001), LV(lobe) (r>0.52, p<0.0001), WA%(seg) (|r|>0.29, p<0.05) and WA%(sub) (|r|>0.31, p<0.05). FEV1/FVC had significant correlation with all parameters (0.27<|r|<0.52, p<0.05). LV(main) and LV(lobe) and WA%(seg) and WA%(sub) were significantly different between the two groups (LV(main) and LV(lobe); p<0.0001, WA%(seg) and WA%(sub); p<0.05). CONCLUSIONS Bronchial luminal volumetric assessment better reflected the airflow limitation parameters. ADVANCES IN KNOWLEDGE Bronchial luminal volumetric assessment can potentially be used to gauge airflow limitation in pulmonary emphysema.
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Affiliation(s)
- H Koyama
- Department of Radiology, Kobe University Graduate School of Medicine, Hyogo, Japan.
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Coentrao L, Ribeiro C, Santos-Araujo C, Neto R, Pestana M, Kleophas W, Kleophas W, Karaboyas A, LI Y, Bommer J, Pisoni R, Robinson B, Port F, Celik G, Burcak Annagur B, Yilmaz M, Demir T, Kara F, Trigka K, Dousdampanis P, Vaitsis N, Aggelakou-Vaitsi S, Turkmen K, Guney I, Turgut F, Altintepe L, Tonbul HZ, Abdel-Rahman E, Sclauzero P, Galli G, Barbati G, Carraro M, Panzetta GO, Van Diepen M, Schroijen M, Dekkers O, Dekker F, Sikole A, Severova- Andreevska G, Trajceska L, Gelev S, Amitov V, Pavleska- Kuzmanovska S, Karaboyas A, Rayner H, LI Y, Vanholder R, Pisoni R, Robinson B, Port F, Hecking M, Jung B, Leung M, Huynh F, Chung T, Marchuk S, Kiaii M, Er L, Werb R, Chan-Yan C, Beaulieu M, Malindretos P, Makri P, Zagkotsis G, Koutroumbas G, Loukas G, Nikolaou E, Pavlou M, Gourgoulianni E, Paparizou M, Markou M, Syrgani E, Syrganis C, Raimann J, Usvyat LA, Bhalani V, Levin NW, Kotanko P, Huang X, Stenvinkel P, Qureshi AR, Riserus U, Cederholm T, Barany P, Heimburger O, Lindholm B, Carrero JJ, Chang JH, Sung JY, Jung JY, Lee HH, Chung W, Kim S, Han JS, Kim S, Chang JH, Jung JY, Chung W, Na KY, Raimann J, Usvyat LA, Kotanko P, Levin NW, Fragoso A, Pinho A, Malho A, Silva AP, Morgado E, Leao Neves P, Joki N, Tanaka Y, Iwasaki M, Kubo S, Hayashi T, Takahashi Y, Hirahata K, Imamura Y, Hase H, Castledine C, Gilg J, Rogers C, Ben-Shlomo Y, Caskey F, Na KY, Kim S, Chung W, Jung JY, Chang JH, Lee HH, Sandhu JS, Bajwa GS, Kansal S, Sandhu J, Jayanti A, Nikam M, Ebah L, Summers A, Mitra S, Agar J, Perkins A, Simmonds R, Tjipto A, Amet S, Launay-Vacher V, Laville M, Tricotel A, Frances C, Stengel B, Gauvrit JY, Grenier N, Reinhardt G, Clement O, Janus N, Rouillon L, Choukroun G, Deray G, Bernasconi A, Waisman R, Montoya AP, Liste AA, Hermes R, Muguerza G, Heguilen R, Iliescu EL, Martina V, Rizzo MA, Magenta P, Lubatti L, Rombola G, Gallieni M, Loirat C, Loirat C, Mellerio H, Labeguerie M, Andriss B, Savoye E, Lassale M, Jacquelinet C, Alberti C, Aggarwal Y, Baharani J, Tabrizian S, Ossareh S, Zebarjadi M, Azevedo P, Travassos F, Frade I, Almeida M, Queiros J, Silva F, Cabrita A, Rodrigues R, Couchoud C, Kitty J, Benedicte S, Fergus C, Cecile C, Couchoud C, Sahar B, Emmanuel V, Christian J, Rene E, Barahimi H, Mahdavi-Mazdeh M, Nafar M, Petruzzi M, De Benedittis M, Sciancalepore M, Gargano L, Natale P, Vecchio MC, Saglimbene V, Pellegrini F, Gentile G, Stroumza P, Frantzen L, Leal M, Torok M, Bednarek A, Dulawa J, Celia E, Gelfman R, Hegbrant J, Wollheim C, Palmer S, Johnson DW, Ford PJ, Craig JC, Strippoli GF, Ruospo M, El Hayek B, Hayek B, Baamonde E, Bosch E, Ramirez JI, Perez G, Ramirez A, Toledo A, Lago MM, Garcia-Canton C, Checa MD, Canaud B, Canaud B, Lantz B, Pisoni R, Granger-Vallee A, Lertdumrongluk P, Molinari N, Ethier J, Jadoul M, Gillespie B, Port F, Bond C, Wang S, Alfieri T, Braunhofer P, Newsome B, Wang M, Bieber B, Guidinger M, Bieber B, Wang M, Zuo L, Pisoni R, Yu X, Yang X, Qian J, Chen N, Albert J, Yan Y, Ramirez S, Bernasconi A, Waisman R, Beresan M, Lapidus A, Canteli M, Heguilen R, Tong A, Palmer S, Manns B, Craig J, Ruospo M, Gargano L, Strippoli G, Mortazavi M, Vahdatpour B, Shahidi S, Ghasempour A, Taheri D, Dolatkhah S, Emami Naieni A, Ghassami M, Khan M, Abdulnabi K, Pai P, Ruospo M, Petruzzi M, De Benedittis M, Sciancalepore M, Gargano L, Vecchio M, Saglimbene V, Natale P, Pellegrini F, Gentile G, Stroumza P, Frantzen L, Leal M, Torok M, Bednarek A, Dulawa J, Celia E, Gelfman R, Hegbrant J, Wollheim C, Palmer S, Johnson DW, Ford PJ, Craig JC, Strippoli GF, Muqueet MA, Muqueet MA, Hasan MJ, Kashem MA, Dutta PK, Liu FX, Noe L, Quock T, Neil N, Inglese G, Qian J, Bieber B, Guidinger M, Bieber B, Chen N, Yan Y, Pisoni R, Wang M, Zuo L, Yu X, Yang X, Wang M, Albert J, Ramirez S, Ossareh S, Motamed Najjar M, Bahmani B, Shafiabadi A, Helve J, Haapio M, Groop PH, Gronhagen-Riska C, Finne P, Helve J, Haapio M, Sund R, Groop PH, Gronhagen-Riska C, Finne P, Cai M, Baweja S, Clements A, Kent A, Reilly R, Taylor N, Holt S, Mcmahon L, Usvyat LA, Carter M, Van der Sande FM, Kooman J, Raimann J, Levin NW, Kotanko P, Usvyat LA, Malhotra R, Ouellet G, Penne EL, Raimann J, Thijssen S, Levin NW, Kotanko P, Etter M, Tashman A, Guinsburg A, Grassmann A, Barth C, Marelli C, Marcelli D, Van der Sande FM, Von Gersdorff G, Bayh I, Kooman J, Scatizzi L, Lam M, Schaller M, Thijssen S, Toffelmire T, Wang Y, Sheppard P, Usvyat LA, Levin NW, Kotanko P, Neri L, Andreucci VA, Rocca-Rey LA, Bertoli SV, Brancaccio D, Tjipto A, Simmonds R, Agar J, Huang X, Stenvinkel P, Qureshi AR, Riserus U, Cederholm T, Barany P, Heimburger O, Lindholm B, Carrero JJ, Vecchio M, Palmer S, De Berardis G, Craig J, Lucisano G, Johnson D, Pellegrini F, Nicolucci A, Sciancalepore M, Saglimbene V, Gargano L, Bonifati C, Ruospo M, Navaneethan SD, Montinaro V, Stroumza P, Zsom M, Torok M, Celia E, Gelfman R, Bednarek-Skublewska A, Dulawa J, Graziano G, Gentile G, Ferrari JN, Santoro A, Zucchelli A, Triolo G, Maffei S, Hegbrant J, Wollheim C, De Cosmo S, Manfreda VM, Strippoli GF, Janus N, Janus N, Launay-Vacher V, Juillard L, Rousset A, Butel F, Girardot-Seguin S, Deray G, Hannedouche T, Isnard M, Berland Y, Vanhille P, Ortiz JP, Janin G, Nicoud P, Touam M, Bruce E, Rouillon L, Laville M, Janus N, Juillard L, Rousset A, Butel F, Girardot-Seguin S, Deray G, Hannedouche T, Isnard M, Berland Y, Vanhille P, Ortiz JP, Janin G, Nicoud P, Touam M, Bruce E, Rouillon L, Laville M, Janus N, Launay-Vacher V, Juillard L, Rousset A, Butel F, Girardot-Seguin S, Deray G, Hannedouche T, Isnard M, Berland Y, Vanhille P, Ortiz JP, Janin G, Nicoud P, Touam M, Bruce E, Rouillon L, Laville M, Grace B, Clayton P, Cass A, Mcdonald S, Baharani J, Furumatsu Y, Kitamura T, Fujii N, Ogata S, Nakamoto H, Iseki K, Tsubakihara Y, Chien CC, Wang JJ, Hwang JC, Wang HY, Kan WC, Kuster N, Kuster N, Patrier L, Bargnoux AS, Morena M, Dupuy AM, Badiou S, Canaud B, Cristol JP, Desmet JM, Fernandes V, Collart F, Spinogatti N, Pochet JM, Dratwa M, Goffin E, Nortier J, Zilisteanu DS, Voiculescu M, Rusu E, Achim C, Bobeica R, Balanica S, Atasie T, Florence S, Anne-Marie S, Michel L, Cyrille C, Emmanuel V, Strakosha A, Strakosha A, Pasko N, Kodra S, Thereska N, Lowney A, Lowney E, Grant R, Murphy M, Casserly L, O' Brien T, Plant WD, Radic J, Radic J, Ljutic D, Kovacic V, Radic M, Dodig-Curkovic K, Sain M, Jelicic I, Fujii N, Hamano T, Nakano C, Yonemoto S, Okuno A, Katayama M, Isaka Y, Nordio M, Limido A, Postorino M, Nichelatti M, Khil M, Dudar I, Khil V, Shifris I, Momtaz M, Soliman AR, El Lawindi MI, Dzekova-Vidimliski P, Pavleska-Kuzmanovska S, Trajceska L, Nikolov I, Selim G, Gelev S, Amitov V, Sikole A, Shoji T, Kakiya R, Hayashi T, Tatsumi-Shimomura N, Tsujimoto Y, Tabata T, Shima H, Mori K, Fukumoto S, Tahara H, Koyama H, Emoto M, Ishimura E, Nishizawa Y, Inaba M. Epidemiology and outcome research in CKD 5D. Nephrol Dial Transplant 2012. [DOI: 10.1093/ndt/gfs227] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yamada K, Koyama H, Hagiwara K, Ueda A, Sasaki Y, Kanesashi SN, Ueno R, Nakamura HK, Kuwata K, Shimizu K, Suzuki M, Aida Y. Identification of a novel compound with antiviral activity against influenza A virus depending on PA subunit of viral RNA polymerase. Microbes Infect 2012; 14:740-7. [PMID: 22441116 DOI: 10.1016/j.micinf.2012.02.012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2011] [Revised: 02/27/2012] [Accepted: 02/29/2012] [Indexed: 10/28/2022]
Abstract
Influenza viruses have developed resistance to current drugs, creating a need for new antiviral targets and new drugs to treat influenza virus infections. In this study, computational and experimental screening of an extensive compound library identified THC19, which was able to suppress influenza virus replication. This compound had no cytotoxic effects and did not disrupt cell cycle progression or induce apoptosis in MDCK cells as confirmed by WST-1 assays, flow cytometry analysis, and caspase-3 assays. Time-of-addition experiments showed that THC19 acts at a relatively early stage of the viral lifecycle. Subsequent mini-genome assays revealed that THC19 inhibited viral genome replication and/or transcription, suggesting that it interferes with one or more of the viral components that form the ribonucleoprotein complexes, namely polymerase basic 2 (PB2), polymerase basic 1 (PB1), polymerase acidic (PA), nucleoprotein (NP) and viral RNA. Finally, mini-genome assays where PB2, PB1, PA or NP from A/WSN/33 (H1N1) virus were replaced with those from A/Udorn/307/1972 (H3N2) virus effectively demonstrated that THC19 inhibited viral multiplication in a manner dependent upon the PA subunit. Taken together, these results suggest that influenza virus PA protein is a potential target for, and may aid the development of, novel compounds that inhibit influenza A virus replication.
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Affiliation(s)
- Kazunori Yamada
- Viral Infectious Diseases Unit, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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Suzuki M, Takashima-Hirano M, Koyama H, Yamaoka T, Sumi K, Nagata H, Hidaka H, Doi H. Efficient synthesis of [11C]H-1152, a PET probe specific for Rho-kinases, highly potential targets in diagnostic medicine and drug development. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.01.033] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Koyama H, Ikeda S, Sugimoto M, Kume S. Effects of Folic Acid on the Development and Oxidative Stress of Mouse Embryos Exposed to Heat Stress. Reprod Domest Anim 2012; 47:921-7. [DOI: 10.1111/j.1439-0531.2012.01992.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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