1
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Yasuda D, Hamano F, Masuda K, Dahlström M, Kobayashi D, Sato N, Hamakubo T, Shimizu T, Ishii S. Inverse agonism of lysophospholipids with cationic head groups at Gi-coupled receptor GPR82. Eur J Pharmacol 2023; 954:175893. [PMID: 37392830 DOI: 10.1016/j.ejphar.2023.175893] [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: 05/11/2023] [Revised: 06/20/2023] [Accepted: 06/28/2023] [Indexed: 07/03/2023]
Abstract
GPR82 is an orphan G protein-coupled receptor (GPCR) that has been implicated in lipid storage in mouse adipocytes. However, the intracellular signaling as well as the specific ligands of GPR82 remain unknown. GPR82 is closely related to GPR34, a GPCR for the bioactive lipid molecule lysophosphatidylserine. In this study, we screened a lipid library using GPR82-transfected cells to search for ligands that act on GPR82. By measuring cyclic adenosine monophosphate levels, we found that GPR82 is an apparently constitutively active GPCR that leads to Gi protein activation. In addition, edelfosine (1-O-octadecyl-2-O-methyl-sn-glycero-3-phosphocholine), an artificial lysophospholipid with a cationic head group that exerts antitumor activity, inhibited the Gi protein activation by GPR82. Two endogenous lysophospholipids with cationic head groups, lysophosphatidylcholine (1-oleoyl-sn-glycero-3-phosphocholine) and lysophosphatidylethanolamine (1-oleoyl-sn-glycero-3-phosphoethanolamine), also exhibited GPR82 inhibitory activity, albeit weaker than edelfosine. Förster resonance energy transfer imaging analysis consistently demonstrated that Gi protein-coupled GPR82 has an apparent constitutive activity that is edelfosine-sensitive. Consistent data were obtained from GPR82-mediated binding analysis of guanosine-5'-O-(3-thiotriphosphate) to cell membranes. Furthermore, in GPR82-transfected cells, edelfosine inhibited insulin-induced extracellular signal-regulated kinase activation, like compounds that function as inverse agonists at other GPCRs. Therefore, edelfosine is likely to act as an inverse agonist of GPR82. Finally, GPR82 expression inhibited adipocyte lipolysis, which was abrogated by edelfosine. Our findings suggested that the cationic lysophospholipids edelfosine, lysophosphatidylcholine and lysophosphatidylethanolamine are novel inverse agonists for Gi-coupled GPR82, which is apparently constitutively active, and has the potential to exert lipolytic effects through GPR82.
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Affiliation(s)
- Daisuke Yasuda
- Department of Immunology, Graduate School of Medicine, Akita University, Akita, Japan
| | - Fumie Hamano
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Kazuyuki Masuda
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | | | - Daiki Kobayashi
- Department of Immunology, Graduate School of Medicine, Akita University, Akita, Japan
| | - Nana Sato
- Department of Immunology, Graduate School of Medicine, Akita University, Akita, Japan
| | - Takao Hamakubo
- Department of Quantitative Biology and Medicine, Research Center for Advanced Science and Technology, The University of Tokyo, Tokyo, Japan
| | - Takao Shimizu
- Department of Lipid Life Science, National Center for Global Health and Medicine, Tokyo, Japan; Institute of Microbial Chemistry, Tokyo, Japan
| | - Satoshi Ishii
- Department of Immunology, Graduate School of Medicine, Akita University, Akita, Japan.
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2
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Yanagida K, Masago K, Yasuda D, Hamano F, Kurikawa Y, Shimizu T, Ishii S. Cell-trafficking impairment in disease-associated LPA6 missense mutants and a potential pharmacoperone therapy for autosomal recessive woolly hair/hypotrichosis. Hum Mol Genet 2023; 32:825-834. [PMID: 36173926 DOI: 10.1093/hmg/ddac244] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 09/11/2022] [Accepted: 09/25/2022] [Indexed: 11/13/2022] Open
Abstract
In human autosomal recessive woolly hair/hypotrichosis (ARWH/HT), many mutations have been identified in a gene encoding LPA6, a G protein-coupled receptor (GPCR) for lysophosphatidic acid (LPA). However, information regarding the effects of such mutations on receptor function is limited. In this study, we examined functional impacts of selected amino acid changes in LPA6 identified in ARWH/HT patients. In our exogenous expression experiments, all mutants except S3T failed to respond to LPA, indicating that they are loss-of-function mutants. Among the nine mutants, five (D63V, G146R, N246D, L277P and C278Y) displayed impaired expression at the cell surface because of endoplasmic reticulum (ER) retention, indicating that these mutants are trafficking-defective, as reported in other disease-associated GPCRs. Notably, alkyl-OMPT, a potent synthetic agonist for LPA6 restored the defective cell surface expression of two of the ER-retained mutants, D63V and N246D, possibly by its chaperoning function that allows them to escape intracellular retention as well as proteasomal degradation. Furthermore, the alkyl-OMPT-rescued N246D mutant was shown be functional. Our findings encourage future application of pharmacoperone therapy for ARWH/HT patients with specific LPA6 mutations.
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Affiliation(s)
- Keisuke Yanagida
- Department of Lipid Life Science, National Center for Global Health and Medicine, Tokyo, Japan
| | - Kayo Masago
- Department of Anesthesiology, Tokyo-Kita Medical Center, Tokyo, Japan
| | - Daisuke Yasuda
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Fumie Hamano
- Life Sciences Core Facility, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Yoshitaka Kurikawa
- Department of Biochemistry and Molecular Biology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Takao Shimizu
- Department of Lipid Life Science, National Center for Global Health and Medicine, Tokyo, Japan
| | - Satoshi Ishii
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
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3
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Katagishi D, Yasuda D, Takahashi K, Nakamura S, Mashino T, Ohe T. Fullerene derivatives as inhibitors of the SARS-CoV-2 main protease. Bioorg Med Chem Lett 2023; 80:129121. [PMID: 36587873 PMCID: PMC9798672 DOI: 10.1016/j.bmcl.2022.129121] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 12/19/2022] [Accepted: 12/27/2022] [Indexed: 12/31/2022]
Abstract
COVID-19 is an ongoing worldwide pandemic. Even today, there is a need for the development of effective therapeutic agents. SARS-CoV-2 is known as the causative virus of COVID-19, and its main protease is one of the enzymes essential for its growth and is considered a drug discovery target. In this study, we evaluated the inhibitory activities of a variety of fullerene derivatives, including newly synthesized derivatives, against the main protease of SARS-CoV-2. As a result, the malonic acid-type fullerene derivatives showed the strongest inhibitory activity.
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Affiliation(s)
- Daiki Katagishi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Kyoko Takahashi
- Department of Chemistry, Nippon Medical School, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Shigeo Nakamura
- Department of Chemistry, Nippon Medical School, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo, Japan
| | - Tadahiko Mashino
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Tomoyuki Ohe
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan,Corresponding author
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4
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Spencer SA, Suárez-Pozos E, Verdugo JS, Wang H, Afshari FS, Li G, Manam S, Yasuda D, Ortega A, Lister JA, Ishii S, Zhang Y, Fuss B. Lysophosphatidic acid signaling via LPA 6 : A negative modulator of developmental oligodendrocyte maturation. J Neurochem 2022; 163:478-499. [PMID: 36153691 PMCID: PMC9772207 DOI: 10.1111/jnc.15696] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Revised: 09/20/2022] [Accepted: 09/21/2022] [Indexed: 01/14/2023]
Abstract
The developmental process of central nervous system (CNS) myelin sheath formation is characterized by well-coordinated cellular activities ultimately ensuring rapid and synchronized neural communication. During this process, myelinating CNS cells, namely oligodendrocytes (OLGs), undergo distinct steps of differentiation, whereby the progression of earlier maturation stages of OLGs represents a critical step toward the timely establishment of myelinated axonal circuits. Given the complexity of functional integration, it is not surprising that OLG maturation is controlled by a yet fully to be defined set of both negative and positive modulators. In this context, we provide here first evidence for a role of lysophosphatidic acid (LPA) signaling via the G protein-coupled receptor LPA6 as a negative modulatory regulator of myelination-associated gene expression in OLGs. More specifically, the cell surface accessibility of LPA6 was found to be restricted to the earlier maturation stages of differentiating OLGs, and OLG maturation was found to occur precociously in Lpar6 knockout mice. To further substantiate these findings, a novel small molecule ligand with selectivity for preferentially LPA6 and LPA6 agonist characteristics was functionally characterized in vitro in primary cultures of rat OLGs and in vivo in the developing zebrafish. Utilizing this approach, a negative modulatory role of LPA6 signaling in OLG maturation could be corroborated. During development, such a functional role of LPA6 signaling likely serves to ensure timely coordination of circuit formation and myelination. Under pathological conditions as seen in the major human demyelinating disease multiple sclerosis (MS), however, persistent LPA6 expression and signaling in OLGs can be seen as an inhibitor of myelin repair. Thus, it is of interest that LPA6 protein levels appear elevated in MS brain samples, thereby suggesting that LPA6 signaling may represent a potential new druggable pathway suitable to promote myelin repair in MS.
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Affiliation(s)
- Samantha A Spencer
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Edna Suárez-Pozos
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Jazmín Soto Verdugo
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - Huiqun Wang
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, Virginia, USA
| | - Fatemah S Afshari
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Guo Li
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, Virginia, USA
| | - Susmita Manam
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Daisuke Yasuda
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Arturo Ortega
- Departamento de Toxicología, Centro de Investigación y de Estudios Avanzados del IPN, Ciudad de México, México
| | - James A Lister
- Department of Human and Molecular Genetics, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
| | - Satoshi Ishii
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Yan Zhang
- Department of Medicinal Chemistry, Virginia Commonwealth University School of Pharmacy, Richmond, Virginia, USA
| | - Babette Fuss
- Department of Anatomy and Neurobiology, Virginia Commonwealth University School of Medicine, Richmond, Virginia, USA
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5
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Yasuda D, Yoshida I, Imamura R, Katagishi D, Takahashi K, Kojima H, Okabe T, Ichimura Y, Komatsu M, Mashino T, Ohe T. Development of p62-Keap1 protein–protein interaction inhibitors as doxorubicin-sensitizers against non-small cell lung cancer. Results in Chemistry 2022. [DOI: 10.1016/j.rechem.2022.100609] [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: 11/06/2022] Open
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6
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Yasuda D, Hiraoka Y, Ohno M, Nishi K, Iwasaki H, Kita T, Nishi E, Kume N. Deficiency of Nardilysin in the Liver Reduces Serum Cholesterol Levels. Biol Pharm Bull 2021; 44:363-371. [PMID: 33642545 DOI: 10.1248/bpb.b20-00722] [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] [Indexed: 11/22/2022]
Abstract
Nardilysin (NRDC) has been shown to be involved in post-translational histone modifications, in addition to enhancement in ectodomain shedding of membrane-anchored protein, which play significant roles in various pathophysiology, including glucose homeostasis, inflammatory diseases and cancer. The present study sought to determine roles of NRDC in the liver on lipid and lipoprotein metabolism. We established liver-specific NRDC deficient mice by use of NRD1 floxed mice and albumin promoter-Cre recombinase (Cre) transgenic mice, and found that their serum low-density lipoprotein (LDL) cholesterol levels were significantly lower than those in control littermate mice. In the liver, LDL receptor (LDLR) mRNA expression was significantly upregulated, while inducible degrader of LDLR (IDOL) and microsomal triglyceride transfer protein (MTP) mRNA expression was significantly downregulated, in liver-specific NRDC deficient mice. Hepatic cell-surface LDLR expression levels were significantly elevated and serum pro-protein convertase subtilisin-kexin type 9 (PCSK9) levels were significantly reduced in mice with hepatic NRDC deficiency. In cultured hepatocytes, NRDC deficiency significantly reduced secreted PCSK9 and increased cell-surface LDLR expression. On the other hand, NRDC overexpression in cultured hepatocytes significantly increased secreted PCSK9 and lowered cell-surface LDLR expression. Thus, NRDC in murine hepatocytes appears to play key roles in cholesterol homeostasis, although the precise molecular mechanisms remain to be determined.
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Affiliation(s)
- Daisuke Yasuda
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Yoshinori Hiraoka
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Mikiko Ohno
- Department of Pharmacology, Shiga University of Medical Sciences
| | - Kiyoto Nishi
- Department of Cardiovascular Medicine, Graduate School of Medicine, Kyoto University
| | - Hirotaka Iwasaki
- Department of Pharmacology, Shiga University of Medical Sciences
| | | | - Eiichiro Nishi
- Department of Pharmacology, Shiga University of Medical Sciences
| | - Noriaki Kume
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
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7
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Yasuda D, Torii H, Shimizu R, Hiraoka Y, Kume N. Reduced Serum Cholesterol and Triglyceride Levels in a Choline-Deficient L-Amino Acid-Defined High-Fat Diet (CDAHFD)-Induced Mouse Model of Non-alcoholic Steatohepatitis (NASH). Biol Pharm Bull 2020; 43:616-618. [PMID: 32238704 DOI: 10.1248/bpb.b19-00338] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Non-alcoholic fatty liver disease (NAFLD) or non-alcoholic seatohepatitis (NASH) is one of the major health problems world wide, because of increased abdominal obesity. To date, specific and effective medications to treat or prevent NAFLD/NASH have not been established. To identify appropriate molecular targets for that purpose, suitable animal models of NAFLD/NASH have been explored. A choline-deficient amino acid-defined high fat diet (CDAHFD)-induced mouse model of NASH has been developed. However, its relevance to human NASH, including serum lipid profiles, have not been clearly defined. In this study, we have revealed that mice fed CDAHFD showed significantly lowerd serum total cholesterol and triglyceride (TG) levels, in addition to reduced body weight (BW). Furthermore, hepatic microsomal triglyceride transfer protein (MTP) expression was significantly downregulated in CDAHFD-fed mice. Thus, the current CDAHFD-fed mouse model has points that are distinct from human NAFLD/NASH, in general, which is based upon abdominal obesity.
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Affiliation(s)
- Daisuke Yasuda
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Haruki Torii
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Rumiko Shimizu
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Yoshinori Hiraoka
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Noriaki Kume
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
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8
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Yasuda D, Ohe T, Takahashi K, Imamura R, Kojima H, Okabe T, Ichimura Y, Komatsu M, Yamamoto M, Nagano T, Mashino T. Inhibitors of the protein-protein interaction between phosphorylated p62 and Keap1 attenuate chemoresistance in a human hepatocellular carcinoma cell line. Free Radic Res 2020; 54:859-871. [PMID: 32075457 DOI: 10.1080/10715762.2020.1732955] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Resistance to anticancer agents has been an obstacle to developing therapeutics and reducing medical costs. Whereas sorafenib is used for the treatment of human hepatocellular carcinoma (HCC), resistance limits its efficacy. p62, a multifunctional protein, is overexpressed in several HCC cell lines, such as Huh-1 cells. Phosphorylated p62 (p-p62) inhibits the protein-protein interaction (PPI) between Keap1 and Nrf2, resulting in the Nrf2 overactivation that causes drug resistance. We have found a unique Nrf2 inactivator, named K67, that inhibited the PPI between Keap1 and p-p62 and attenuated sorafenib resistance in Huh-1 cells. Herein, we designed and synthesised novel K67 derivatives by modification of the substituent at the 4-position of the two benzenesulfonyl groups of K67. Although these new derivatives inhibited the Keap1-p-p62 PPI to a level comparable to or weaker than that of K67, the isopropoxy derivative enhanced the sensitivity of Huh-1 cells to sorafenib to a greater extent than K67 without any influence on the viability of Huh-7 cells, which is a non-resistant HCC cell line. The isopropoxy derivative also increased the sensitivity of Huh-1 cells to regorafenib, which suggests that this derivative has the potential to be used as an agent to overcome chemoresistance based on Nrf2 inactivation.
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Affiliation(s)
- Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Tomoyuki Ohe
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Kyoko Takahashi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo, Japan
| | - Riyo Imamura
- Drug Discovery Initiative, University of Tokyo, Tokyo, Japan
| | | | - Takayoshi Okabe
- Drug Discovery Initiative, University of Tokyo, Tokyo, Japan
| | - Yoshinobu Ichimura
- Department of Physiology, Juntendo University School of Medicine, Tokyo, Japan
| | - Masaaki Komatsu
- Department of Physiology, Juntendo University School of Medicine, Tokyo, Japan
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University School of Medicine, Sendai-shi, Japan
| | - Tetsuo Nagano
- Drug Discovery Initiative, University of Tokyo, Tokyo, Japan
| | - Tadahiko Mashino
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo, Japan
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9
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Tateishi Y, Ohe T, Yasuda D, Takahashi K, Nakamura S, Kazuki Y, Mashino T. Synthesis and evaluation of nevirapine analogs to study the metabolic activation of nevirapine. Drug Metab Pharmacokinet 2020; 35:238-243. [PMID: 32184040 DOI: 10.1016/j.dmpk.2020.01.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 12/19/2019] [Accepted: 01/29/2020] [Indexed: 11/26/2022]
Abstract
Nevirapine (NVP) is widely used as a non-nucleoside reverse transcriptase inhibitor of HIV-1, however, it is associated with severe skin and liver injury. The mechanisms of these adverse reactions are not yet clear, but the metabolic activation of NVP is thought to be related to the injury process. Until now, several metabolic activation pathways of NVP have been reported. In this study, in order to identify the reactive metabolite of NVP mainly responsible for CYP inhibition and liver injury, we synthesized five NVP analogs designed to avoid the proposed bioactivation pathway and evaluated their metabolic stabilities, CYP3A4 time-dependent inhibitory activities, and cytotoxicity. As a result, only a pyrimidine analog of NVP, which could avoid the formation of a reactive epoxide intermediate, did not inhibit CYP3A4. Outside of this compound, the other synthesized compounds, which could avoid the generation of a reactive quinone-methide intermediate, inhibited CYP3A4 equal to or stronger than NVP. The pyrimidine analog of NVP did not induce cytotoxicity in HepG2 and transchromosomic HepG2 cells, expressing major four CYP enzymes and CYP oxidoreductase. These results indicated that the epoxide intermediate of NVP might play an important role in NVP-induced liver injury.
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Affiliation(s)
- Yasuhiro Tateishi
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Tomoyuki Ohe
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan.
| | - Daisuke Yasuda
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Kyoko Takahashi
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Shigeo Nakamura
- Department of Chemistry, Nippon Medical School, 1-7-1 Kyonan-cho, Musashino, Tokyo, Japan
| | - Yasuhiro Kazuki
- Department of Biomedical Science, Institute of Regenerative Medicine and Biofunction, Graduate School of Medical Science, Tottori University, 86 Nishi-cho, Yonago, Tottori, Japan; Chromosome Engineering Research Center (CERC), Tottori University, 86 Nishi-cho, Yonago, Tottori, Japan
| | - Tadahiko Mashino
- Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
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10
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Okano H, Yasuda D, Fujimori K, Morimoto S, Takahashi S. Ropinirole, a New ALS Drug Candidate Developed Using iPSCs. Trends Pharmacol Sci 2020; 41:99-109. [PMID: 31926602 DOI: 10.1016/j.tips.2019.12.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2019] [Revised: 11/28/2019] [Accepted: 12/04/2019] [Indexed: 12/12/2022]
Abstract
Induced pluripotent stem cells (iPSCs) are increasingly used in the study of disease mechanisms and the development of effective disease-modifying therapies for neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS). Recently, three candidate anti-ALS drugs - ropinirole (ROPI), retigabine, and bosutinib - have been identified in iPSC-based drug screens and are now being evaluated in clinical trials for safety and effectiveness. We review the preclinical data, clinical research design, and rationale for ROPI as an anti-ALS drug candidate compared with those of the other two drugs. We also discuss the use of iPSCs for understanding and monitoring treatment response as well as for new insights into the development of new drugs and therapeutic interventions for major neurodegenerative diseases.
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Affiliation(s)
- Hideyuki Okano
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan.
| | - Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Koki Fujimori
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
| | - Satoru Morimoto
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan
| | - Shinichi Takahashi
- Department of Physiology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan; Department of Neurology, Keio University School of Medicine, 35 Shinanomachi, Shinjuku-ku, Tokyo, Japan; Department of Neurology and Stroke, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka-shi, Saitama, Japan
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11
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Inoue M, Yoshida J, Oka S, Honda Y, Chikaishi Y, Yasuda D. P1.04-53 A High PD-L1 Expression in Non-Small Cell Lung Cancer Correlates with Expression of SPOP and CD8 Tumor-Infiltrating Lymphocytes. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Kume N, Yasuda D, Torii H, Hiraoka Y. Reduced Hepatic Microsomal Triglyceride Transfer Protein (Mtp) Expression In A Mouse Model Of Non-Alcoholic Steatohepatitis (Nash) Induced By Choline-Deficient High Fat Diet (Cdahfd). Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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13
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Yasuda D, Kobayashi D, Akahoshi N, Ohto-Nakanishi T, Yoshioka K, Takuwa Y, Mizuno S, Takahashi S, Ishii S. Lysophosphatidic acid-induced YAP/TAZ activation promotes developmental angiogenesis by repressing Notch ligand Dll4. J Clin Invest 2019; 129:4332-4349. [PMID: 31335323 DOI: 10.1172/jci121955] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Lysophosphatidic acid (LPA) is a potent lipid mediator with various biological functions mediated through six G protein-coupled receptors (GPCRs), LPA1-6. Previous studies have demonstrated that LPA-Gα12/Gα13 signaling plays an important role in embryonic vascular development. However, the responsible LPA receptors and underlying mechanisms are poorly understood. Here, we show a critical role of LPA4 and LPA6 in developmental angiogenesis. In mice, Lpa4;Lpa6 double knockout (DKO) embryos were lethal due to global vascular deficiencies, and endothelial cell (EC)-specific Lpa4;Lpa6 DKO retinas had impaired sprouting angiogenesis. Mechanistically, LPA activated the transcriptional regulators YAP and TAZ through LPA4/LPA6-mediated Gα12/Gα13-Rho-ROCK signaling in ECs. YAP/TAZ knockdown increased β-catenin- and Notch intracellular domain (NICD)-mediated endothelial expression of the Notch ligand delta-like 4 (DLL4). Fibrin gel sprouting assay revealed that LPA4/LPA6, Gα12/Gα13, or YAP/TAZ knockdown consistently blocked EC sprouting, which was rescued by a Notch inhibitor. Of note, the inhibition of Notch signaling also ameliorated impaired retinal angiogenesis in EC-specific Lpa4;Lpa6 DKO mice. Overall, these results suggest that the Gα12/Gα13-coupled receptors LPA4 and LPA6 synergistically regulate endothelial Dll4 expression through YAP/TAZ activation. This could in part account for the mechanism of YAP/TAZ-mediated developmental angiogenesis. Our findings provide a novel insight into the biology of GPCR-activated YAP/TAZ.
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Affiliation(s)
- Daisuke Yasuda
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Daiki Kobayashi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Noriyuki Akahoshi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Takayo Ohto-Nakanishi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Kazuaki Yoshioka
- Department of Vascular Molecular Physiology, Kanazawa University Graduate School of Medicine, Ishikawa, Japan
| | - Yoh Takuwa
- Department of Vascular Molecular Physiology, Kanazawa University Graduate School of Medicine, Ishikawa, Japan
| | - Seiya Mizuno
- Laboratory Animal Resource Center, University of Tsukuba, Ibaraki, Japan
| | - Satoru Takahashi
- Laboratory Animal Resource Center, University of Tsukuba, Ibaraki, Japan
| | - Satoshi Ishii
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
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14
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Torii H, Shimizu R, Tanizaki Y, Omiya Y, Yamamoto M, Kamiike S, Yasuda D, Hiraoka Y, Hashida T, Kume N. Effects of Ramelteon and Other Sleep-Promoting Drugs on Serum Low-Density Lipoprotein and Non-high-density Lipoprotein Cholesterol: A Retrospective Comparative Pilot Study. Biol Pharm Bull 2019; 41:1778-1790. [PMID: 30504680 DOI: 10.1248/bpb.b18-00411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Melatonin has been suggested to play important roles in lipid metabolism as well as circadian rhythm; however, very few studies explored the effects of ramelteon, a selective melatonin receptor agonist, on serum lipid profiles. In this study effects of ramelteon on serum lipid profiles were explored, comparing to those of other sleep-promoting drugs including benzodiazepines and non-benzodiazepines, in patients with insomnia. We retrospectively reviewed medical charts of outpatients who were treated with ramelteon (8 mg/d) or other sleep-promoting drugs for no less than 8 weeks during the period between October 1st, 2011 and September 30th, 2014, and compared the changes in serum lipid profiles between the two groups. Patients with regular dialysis or malignant diseases treated with cytotoxic anti-cancer drugs, or whose lipid-lowering drugs were altered during the study period, were excluded. Among 365 or 855 outpatients treated with ramelteon or other sleep-promoting drugs, 35 or 46 patients, respectively, had complete serum low-density lipoprotein cholesterol (LDL-C) or non-high-density lipoprotein cholesterol (non-HDL-C) data. Serum LDL-C was significantly reduced from 103.1±4.4 to 94.6±4.2 mg/dL (8.2% reduction, p<0.05, n=31) in the ramelteon group, and was not significantly changed (p=0.23, n=40) in the other sleep-promoting drug group. Non-HDL-C was significantly decreased from 138.8±6.0 to 130.6±4.9 mg/dL (5.9% reduction, p<0.05, n=32) in the ramelteon group, and was not significantly altered (p=0.29, n=42) in the other sleep-promoting drug group. Ramelteon, but not other sleep-promoting drugs, specifically lowers serum LDL-C and non-HDL-C levels.
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Affiliation(s)
- Haruki Torii
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Rumiko Shimizu
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Yuriko Tanizaki
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Yurina Omiya
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Miwa Yamamoto
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Sayaka Kamiike
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Daisuke Yasuda
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Yoshinori Hiraoka
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
| | - Tohru Hashida
- Department of Pharmacy, Kobe City Medical Center General Hospital
| | - Noriaki Kume
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
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15
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Yanagida K, Igarashi H, Yasuda D, Kobayashi D, Ohto-Nakanishi T, Akahoshi N, Sekiba A, Toyoda T, Ishijima T, Nakai Y, Shojima N, Kubota N, Abe K, Kadowaki T, Ishii S, Shimizu T. The Gα12/13-coupled receptor LPA4 limits proper adipose tissue expansion and remodeling in diet-induced obesity. JCI Insight 2018; 3:97293. [PMID: 30568036 DOI: 10.1172/jci.insight.97293] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Accepted: 11/06/2018] [Indexed: 12/26/2022] Open
Abstract
White adipose tissue (WAT) can dynamically expand and remodel through adipocyte hypertrophy and hyperplasia. The relative contribution of these 2 mechanisms to WAT expansion is a critical determinant of WAT function and dysfunction in obesity. However, little is known about the signaling systems that determine the mechanisms of WAT expansion. Here, we show that the GPCR LPA4 selectively activates Gα12/13 proteins in adipocytes and limits continuous remodeling and healthy expansion of WAT. LPA4-KO mice showed enhanced expression of mitochondrial and adipogenesis genes and reduced levels of inhibitory phosphorylation of PPARγ in WAT, along with increased production of adiponectin. Furthermore, LPA4-KO mice showed metabolically healthy obese phenotypes in a diet-induced obesity model, with continuous WAT expansion, as well as protection from WAT inflammation, hepatosteatosis, and insulin resistance. These findings unravel a potentially new signaling system that underlies WAT plasticity and expandability, providing a promising therapeutic approach for obesity-related metabolic disorders.
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Affiliation(s)
- Keisuke Yanagida
- Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan
| | - Hidemitsu Igarashi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Daisuke Yasuda
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Daiki Kobayashi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Takayo Ohto-Nakanishi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Noriyuki Akahoshi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Atsushi Sekiba
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Tsudoi Toyoda
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences
| | - Tomoko Ishijima
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences
| | - Yuji Nakai
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences
| | - Nobuhiro Shojima
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, and
| | - Naoto Kubota
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, and
| | - Keiko Abe
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic Diseases, Graduate School of Medicine, and
| | - Satoshi Ishii
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Takao Shimizu
- Department of Lipid Signaling, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan.,Department of Lipidomics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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16
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Ohe T, Umezawa R, Kitagawara Y, Yasuda D, Takahashi K, Nakamura S, Abe A, Sekine S, Ito K, Okunushi K, Morio H, Furihata T, Anzai N, Mashino T. Synthesis of novel benzbromarone derivatives designed to avoid metabolic activation. Bioorg Med Chem Lett 2018; 28:3708-3711. [DOI: 10.1016/j.bmcl.2018.10.023] [Citation(s) in RCA: 6] [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] [Received: 08/22/2018] [Revised: 10/09/2018] [Accepted: 10/15/2018] [Indexed: 10/28/2022]
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17
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Matsumaru T, Yasuda D. [Young Innovators Driving the Next Generation of Academic Drug Discovery]. YAKUGAKU ZASSHI 2018; 138:1025-1026. [PMID: 30068842 DOI: 10.1248/yakushi.17-00211-f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
| | - Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University
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18
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Yasuda D, Obata R, Takahashi K, Ohe T, Mashino T. [Hit-to-Lead in Academia: Discovery of a Protein-Protein Interaction Inhibitor of Keap1-Nrf2]. YAKUGAKU ZASSHI 2018; 138:1059-1065. [PMID: 30068847 DOI: 10.1248/yakushi.17-00211-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the process of recent hit-to-lead studies, not only in industry but also in academia, early evaluation of metabolic properties has been one of the key aspects supporting a higher probability of success in drug discovery. In this review, we introduce the development of chemical seeds targeting the Kelch-like ECH-associated protein-1 (Keap1) as an example of an academic hit-to-lead study considering metabolic stability. Keap1 regulates the function of nuclear factor erythroid 2-related factor 2 (Nrf2), which induces various antioxidative or detoxification proteins. An inhibitor of protein-protein interaction (PPI) between Keap1 and Nrf2 to activate Nrf2 is expected to be a novel target for drug discovery. However, Nrf2 is also activated in several cancers, such as human hepatocellular carcinoma, and causes chemoresistance, which is mediated by phosphorylated p62/Sqstm1 (p-p62), an autophagy-related protein that also undergoes a PPI with Keap1. In this case, an Nrf2 suppressor could be used to attenuate drug resistance. We discovered inhibitors against the Nrf2-Keap1 PPI and p-p62-Keap1 PPI using high-throughput screening and established the synthetic routes for the hit compounds and their derivatives. Furthermore, we assessed the metabolic stability of both of the PPI inhibitors in human liver microsomes and identified the metabolic sites.
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Affiliation(s)
- Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University
| | - Rika Obata
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University
| | - Kyoko Takahashi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University
| | - Tomoyuki Ohe
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University
| | - Tadahiko Mashino
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University
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19
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Kume N, Torii H, Yasuda D, Shimizu R, Hiraoka Y. Serum lipid profiles in a mouse model of non-alcoholic steatohepatitis (NASH) induced by choline-deficient high fat diet (CDHFD). Atherosclerosis 2018. [DOI: 10.1016/j.atherosclerosis.2018.06.585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Yasuda D, Yuasa A, Obata R, Nakajima M, Takahashi K, Ohe T, Ichimura Y, Komatsu M, Yamamoto M, Imamura R, Kojima H, Okabe T, Nagano T, Mashino T. Discovery of benzo[g]indoles as a novel class of non-covalent Keap1-Nrf2 protein-protein interaction inhibitor. Bioorg Med Chem Lett 2017; 27:5006-5009. [PMID: 29037947 DOI: 10.1016/j.bmcl.2017.10.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [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: 09/11/2017] [Revised: 10/03/2017] [Accepted: 10/05/2017] [Indexed: 01/06/2023]
Abstract
The Keap1-Nrf2 system is an attractive target for drug discovery regarding various unmet medical needs. Only covalent inhibitors for protein-protein interaction (PPI) between Keap1 and Nrf2 to activate Nrf2 have been approved or are under clinical trials, but such electrophilic compounds lack selectivity. Therefore, specific non-covalent Keap1-Nrf2 PPI inhibitors are expected to be safer Nrf2 activators. We found a novel class of non-covalent Keap1-Nrf2 PPI inhibitor that has a benzo[g]indole skeleton and an indole-3-hydroxamic acid moiety and that exhibits significant PPI inhibitory activity. Additionally, the benzo[g]indole-3-carbohydrazide derivatives were newly prepared. The benzo[g]indole derivatives showed a stronger Keap1-Nrf2 PPI inhibitory activity than Cpd16, a previously reported non-covalent PPI inhibitor. Moreover, most of the PPI inhibitors showed a high metabolic stability in a human microsome system with a low cytotoxicity against HepG2 cell lines, which suggests that novel benzo[g]indole-type Keap1-Nrf2 PPI inhibitors are expected to be biological tools or lead compounds for Nrf2 activators.
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Affiliation(s)
- Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Akihiro Yuasa
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Rika Obata
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Mao Nakajima
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Kyoko Takahashi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan
| | - Tomoyuki Ohe
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan.
| | - Yoshinobu Ichimura
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachidori, Chuo-ku, Niigata-shi, Niigata, Japan
| | - Masaaki Komatsu
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, 1-757 Asahimachidori, Chuo-ku, Niigata-shi, Niigata, Japan
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University School of Medicine, 2-1 Seiryo-machi, Aoba-ku, Sendai-shi, Miyagi, Japan
| | - Riyo Imamura
- Drug Discovery Initiative, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Hirotatsu Kojima
- Drug Discovery Initiative, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Takayoshi Okabe
- Drug Discovery Initiative, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Tetsuo Nagano
- Drug Discovery Initiative, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan
| | - Tadahiko Mashino
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, 1-5-30 Shibakoen, Minato-ku, Tokyo, Japan.
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21
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Tanishima M, Takashima S, Honda A, Yasuda D, Tanikawa T, Ishii S, MaruYama T. Identification of optineurin as an interleukin-1 receptor-associated kinase 1-binding protein and its role in regulation of MyD88-dependent signaling. J Biol Chem 2017; 292:17250-17257. [PMID: 28882891 DOI: 10.1074/jbc.m117.813899] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [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: 08/22/2017] [Indexed: 12/13/2022] Open
Abstract
Upon stimulation of toll-like receptors with various microbial ligands, induction of a variety of inflammatory genes is elicited by activation of a myeloid differentiation primary-response protein 88 (MyD88)-dependent signaling pathway. Interleukin-1 (IL-1) receptor-associated kinase 1 (IRAK1) plays an essential role in this pathway by activating nuclear factor κB (NF-κB) and mitogen-activated kinases (MAPKs). Here, we identified optineurin (OPTN) as an IRAK1-binding protein by yeast two-hybrid screening using IRAK1 as bait. A C-terminal fragment of OPTN harboring a ubiquitin-binding domain was co-immunoprecipitated with IRAK1. In reporter analyses, overexpression of OPTN inhibited IL-1β-, IRAK1-, and LPS-induced NF-κB activation. Consistently, OPTN deficiency resulted in increased NF-κB activation in response to IL-1β/LPS stimulation. To address the mechanisms underlying the inhibitory effect of OPTN on NF-κB signaling, we focused on tumor necrosis factor (TNF) receptor-associated factor 6 (TRAF6), which is an adaptor protein of IRAK1 and upon polyubiquitination plays a crucial role during NF-κB activation. Overexpression of OPTN prevented TRAF6 polyubiquitination. Furthermore, OPTN H486R mutant, which is unable to recruit the deubiquitinase CYLD, failed to inhibit IRAK1-induced NF-κB activation. These results suggest that the IRAK1-binding protein OPTN negatively regulates IL-1β/LPS-induced NF-κB activation by preventing polyubiquitination of TRAF6.
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Affiliation(s)
- Mitsuyoshi Tanishima
- From the Laboratory of Cell Recognition and Response, Department of Developmental Biology and Neurosciences, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi 980-8578, Japan
| | - Shigeo Takashima
- Life Science Research Center, Gifu University, Gifu 501-1194, Japan
| | - Arata Honda
- Organization for Promotion of Tenure Track, University of Miyazaki, 5200 Kihara, Kiyotake, Miyazaki 889-1692, Japan
| | - Daisuke Yasuda
- Department of Immunology, Akita University Graduate School of Medicine, Akita 010-8543, Japan, and
| | - Takashi Tanikawa
- Faculty of Pharma-Sciences, Teikyo University, 2-11-1 Kaga, Itabashi-Ku, Tokyo 173-8605, Japan
| | - Satoshi Ishii
- Department of Immunology, Akita University Graduate School of Medicine, Akita 010-8543, Japan, and
| | - Takashi MaruYama
- From the Laboratory of Cell Recognition and Response, Department of Developmental Biology and Neurosciences, Graduate School of Life Sciences, Tohoku University, Sendai, Miyagi 980-8578, Japan, .,Department of Immunology, Akita University Graduate School of Medicine, Akita 010-8543, Japan, and
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22
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Kume N, Torii H, Shimizu R, Yasuda D, Hiraoka Y, Hashida T. Ramelteon reduces serum LDL and non-HDL cholesterol levels in patients with insomnia. Atherosclerosis 2017. [DOI: 10.1016/j.atherosclerosis.2017.06.668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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23
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Shimizu R, Torii H, Yasuda D, Hiraoka Y, Furukawa Y, Yoshimoto A, Iwakura T, Matsuoka N, Tomii K, Kohara N, Hashida T, Kume N. Comparison of serum lipid management between elderly and non-elderly patients with and without coronary heart disease (CHD). Prev Med Rep 2016; 4:192-8. [PMID: 27413682 PMCID: PMC4929129 DOI: 10.1016/j.pmedr.2016.06.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 06/01/2016] [Accepted: 06/05/2016] [Indexed: 01/14/2023] Open
Abstract
Serum lipid management in patients aged ≥ 75 has not been precisely explored. We, therefore, compared the serum lipid management between the two age groups with and without coronary heart disease (CHD). We, therefore, retrospectively reviewed medical charts of patients who were hospitalized in the departments of internal medicine during a period of 14 months. Serum lipid goal attainment was explored by applying the lipid goals for patients aged < 75 to those aged ≥ 75. In 1988 enrolled patients, 717 subjects (36.1%) were aged ≥ 75. Among them, 41.3% and 32.4% of the patients had CHD, 44.2% and 41.0% were primary prevention at high-risk, and 14.5% and 14.6% were primary prevention at moderate-risk in patients aged ≥ 75 and aged < 75, respectively. Serum LDL-C goal achievement rates in CHD were 66.9% and 65.0% in patients aged ≥ 75 and < 75, respectively (p = 0.334). In the primary prevention at high-risk, these rates were 73.5% and 63.3%, in patients aged ≥ 75 and < 75, respectively (p = 0.001). They were 77.9% and 58.1% in primary prevention at moderate-risk aged ≥ 75 and < 75, respectively (p < 0.001). In CHD, lipid-lowering medication subscription rates were significantly lower in patients aged ≥ 75 (60.1%) than those aged < 75 (73.8%, p < 0.001). In conclusion, in CHD, serum lipid goal attainment was comparable between the two age groups although the lipid-lowering drugs were less frequently prescribed in patients aged ≥ 75. Without CHD, it was significantly better in patients aged ≥ 75 than those aged < 75 although the lipid-lowering drug subscription rates were comparable between the two age groups.
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Affiliation(s)
- Rumiko Shimizu
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Haruki Torii
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Daisuke Yasuda
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Yoshinori Hiraoka
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
| | - Yutaka Furukawa
- Department of Cardiology, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Akihiro Yoshimoto
- Department of Nephrology, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Toshio Iwakura
- Department of Diabetes and Endocrinology, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Naoki Matsuoka
- Department of Diabetes and Endocrinology, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Keisuke Tomii
- Department of Respiratory Medicine, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Nobuo Kohara
- Department of Neurology, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Tohru Hashida
- Department of Pharmacy, Kobe City Medical Center General Hospital, 2-2-1 Minatojimaminami-machi, Chuo-ku, Kobe 650-0047, Japan
| | - Noriaki Kume
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University, 1-1-3 Minatojima, Chuo-ku, Kobe 650-8586, Japan
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Yasuda D, Nakajima M, Yuasa A, Obata R, Takahashi K, Ohe T, Ichimura Y, Komatsu M, Yamamoto M, Imamura R, Kojima H, Okabe T, Nagano T, Mashino T. Synthesis of Keap1-phosphorylated p62 and Keap1-Nrf2 protein-protein interaction inhibitors and their inhibitory activity. Bioorg Med Chem Lett 2016; 26:5956-5959. [DOI: 10.1016/j.bmcl.2016.10.083] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 10/25/2016] [Accepted: 10/27/2016] [Indexed: 12/30/2022]
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25
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Yasuda D, Takahashi K, Ohe T, Nakamura S, Mashino T. Preparation and antioxidant/pro-oxidant activities of 3-monosubstituted 5-hydroxyoxindole derivatives. J Clin Biochem Nutr 2016; 59:165-173. [PMID: 27895383 PMCID: PMC5110937 DOI: 10.3164/jcbn.16-24] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2016] [Accepted: 04/22/2016] [Indexed: 11/22/2022] Open
Abstract
Antioxidant treatments have been expected to be a novel therapeutics for various oxidative stress-mediated disorders. Our previous study revealed that 5-hydroxyoxindole and its 3-phenacyl-3-hydroxy derivatives showed excellent antioxidant activities such as 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and lipid-peroxidation inhibitory activity. However, the DPPH radical scavenging activity of the 3,3-disubstituted derivatives was lower than that of the original 5-hydroxyoxindole. In the present study, we synthesized novel 3-monosubstituted 5-hydroxyoxindole derivatives that exhibited stronger DPPH radical scavenging activities and lipid peroxidation-inhibitory activities than the 3,3-disubstituted 5-hydroxyoxindoles. Moreover, the 3-monosubstituted 5-hydroxyoxindole derivatives showed neither an iron-mediated pro-oxidant effect nor a remarkable cytotoxicity against HL-60 cell lines except some of the highly lipophilic compounds. These results indicate that 3-monosubstituted 5-hydroxyoxindoles can be used as a promising antioxidant scaffold for drug discovery.
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Affiliation(s)
- Daisuke Yasuda
- Department of Pharmaceutical Sciences, Keio University Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Kyoko Takahashi
- Department of Pharmaceutical Sciences, Keio University Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Tomoyuki Ohe
- Department of Pharmaceutical Sciences, Keio University Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
| | - Shigeo Nakamura
- Department of Chemistry, Nippon Medical School, 1-7-1 Kyonan-cho, Musashino-shi, Tokyo 180-0023, Japan
| | - Tadahiko Mashino
- Department of Pharmaceutical Sciences, Keio University Faculty of Pharmacy, 1-5-30 Shibakoen, Minato-ku, Tokyo 105-8512, Japan
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Kume N, Shimizu R, Torii H, Yasuda D, Hiraoka Y, Hashida T. Comparison of lipid management between elderly and non-elderly patients with and without coronary heart disease (CHD). Atherosclerosis 2016. [DOI: 10.1016/j.atherosclerosis.2016.07.410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Saito T, Ichimura Y, Taguchi K, Suzuki T, Mizushima T, Takagi K, Hirose Y, Nagahashi M, Iso T, Fukutomi T, Ohishi M, Endo K, Uemura T, Nishito Y, Okuda S, Obata M, Kouno T, Imamura R, Tada Y, Obata R, Yasuda D, Takahashi K, Fujimura T, Pi J, Lee MS, Ueno T, Ohe T, Mashino T, Wakai T, Kojima H, Okabe T, Nagano T, Motohashi H, Waguri S, Soga T, Yamamoto M, Tanaka K, Komatsu M. p62/Sqstm1 promotes malignancy of HCV-positive hepatocellular carcinoma through Nrf2-dependent metabolic reprogramming. Nat Commun 2016; 7:12030. [PMID: 27345495 PMCID: PMC4931237 DOI: 10.1038/ncomms12030] [Citation(s) in RCA: 233] [Impact Index Per Article: 29.1] [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: 07/14/2015] [Accepted: 05/24/2016] [Indexed: 12/19/2022] Open
Abstract
p62/Sqstm1 is a multifunctional protein involved in cell survival, growth and death, that is degraded by autophagy. Amplification of the p62/Sqstm1 gene, and aberrant accumulation and phosphorylation of p62/Sqstm1, have been implicated in tumour development. Herein, we reveal the molecular mechanism of p62/Sqstm1-dependent malignant progression, and suggest that molecular targeting of p62/Sqstm1 represents a potential chemotherapeutic approach against hepatocellular carcinoma (HCC). Phosphorylation of p62/Sqstm1 at Ser349 directs glucose to the glucuronate pathway, and glutamine towards glutathione synthesis through activation of the transcription factor Nrf2. These changes provide HCC cells with tolerance to anti-cancer drugs and proliferation potency. Phosphorylated p62/Sqstm1 accumulates in tumour regions positive for hepatitis C virus (HCV). An inhibitor of phosphorylated p62-dependent Nrf2 activation suppresses the proliferation and anticancer agent tolerance of HCC. Our data indicate that this Nrf2 inhibitor could be used to make cancer cells less resistant to anticancer drugs, especially in HCV-positive HCC patients.
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Affiliation(s)
- Tetsuya Saito
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan.,Laboratory of Protein Metabolism, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan
| | - Yoshinobu Ichimura
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan.,Laboratory of Protein Metabolism, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan
| | - Keiko Taguchi
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Takafumi Suzuki
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Tsunehiro Mizushima
- Department of Life Science, Picobiology Institute, Graduate School of Life Science, University of Hyogo, 3-2-1, Hyogo 678-1297, Japan
| | - Kenji Takagi
- Department of Life Science, Picobiology Institute, Graduate School of Life Science, University of Hyogo, 3-2-1, Hyogo 678-1297, Japan
| | - Yuki Hirose
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Masayuki Nagahashi
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Tetsuro Iso
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Toshiaki Fukutomi
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Maki Ohishi
- Institute for Advanced Biosciences, Keio University, Tsuruoka 997-0052, Japan
| | - Keiko Endo
- Institute for Advanced Biosciences, Keio University, Tsuruoka 997-0052, Japan
| | - Takefumi Uemura
- Department of Anatomy and Histology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Yasumasa Nishito
- Core Technology and Research Center, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan
| | - Shujiro Okuda
- Bioinformatics Laboratory, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Miki Obata
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Tsuguka Kouno
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Riyo Imamura
- The University of Tokyo, Drug Discovery Initiative, University of Tokyo, Tokyo 113-0033, Japan
| | - Yukio Tada
- The University of Tokyo, Drug Discovery Initiative, University of Tokyo, Tokyo 113-0033, Japan
| | - Rika Obata
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Daisuke Yasuda
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Kyoko Takahashi
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Tsutomu Fujimura
- Laboratory of Proteomics and Biomolecular Science, Research Support Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Jingbo Pi
- Institute for Chemical Safety Sciences, Hamner Institutes for Health Sciences, Research Triangle Park, North Carolina 27709-2137, USA
| | - Myung-Shik Lee
- Severance Biomedical Science Institute and Department of Internal Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Takashi Ueno
- Laboratory of Proteomics and Biomolecular Science, Research Support Center, Juntendo University Graduate School of Medicine, Tokyo 113-8421, Japan
| | - Tomoyuki Ohe
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Tadahiko Mashino
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Keio University, Tokyo 105-8512, Japan
| | - Toshifumi Wakai
- Division of Digestive and General Surgery, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
| | - Hirotatsu Kojima
- The University of Tokyo, Drug Discovery Initiative, University of Tokyo, Tokyo 113-0033, Japan
| | - Takayoshi Okabe
- The University of Tokyo, Drug Discovery Initiative, University of Tokyo, Tokyo 113-0033, Japan
| | - Tetsuo Nagano
- The University of Tokyo, Drug Discovery Initiative, University of Tokyo, Tokyo 113-0033, Japan
| | - Hozumi Motohashi
- Department of Gene Expression Regulation, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan
| | - Satoshi Waguri
- Department of Anatomy and Histology, Fukushima Medical University School of Medicine, Fukushima 960-1295, Japan
| | - Tomoyoshi Soga
- Institute for Advanced Biosciences, Keio University, Tsuruoka 997-0052, Japan
| | - Masayuki Yamamoto
- Department of Medical Biochemistry, Tohoku University Graduate School of Medicine, Sendai 980-8575, Japan
| | - Keiji Tanaka
- Laboratory of Protein Metabolism, Tokyo Metropolitan Institute of Medical Science, Tokyo 156-8506, Japan
| | - Masaaki Komatsu
- Department of Biochemistry, Niigata University Graduate School of Medical and Dental Sciences, Niigata 951-8510, Japan
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Igarashi H, Akahoshi N, Ohto-Nakanishi T, Yasuda D, Ishii S. The lysophosphatidic acid receptor LPA4 regulates hematopoiesis-supporting activity of bone marrow stromal cells. Sci Rep 2015; 5:11410. [PMID: 26090649 PMCID: PMC4473687 DOI: 10.1038/srep11410] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 12/22/2014] [Accepted: 05/26/2015] [Indexed: 12/23/2022] Open
Abstract
Lysophosphatidic acid (LPA) is a pleiotropic lipid mediator that acts through G protein-coupled receptors (LPA1-6). Although several biological roles of LPA4 are becoming apparent, its role in hematopoiesis has remained unknown. Here, we show a novel regulatory role for LPA4 in hematopoiesis. Lpar4 mRNA was predominantly expressed in mouse bone marrow (BM) PDGFRα+ stromal cells, known as the components of the hematopoietic stem/progenitor cell (HSPC) niche. Compared with wild-type mice, LPA4-deficient mice had reduced HSPC numbers in the BM and spleen and were hypersusceptible to myelosuppression, most likely due to impairments in HSPC recovery and stem cell factor production in the BM. Analysis of reciprocal BM chimeras (LPA4-deficient BM into wild-type recipients and vice versa) indicated that stromal cells likely account for these phenotypes. Consistently, LPA4-deficient BM stromal cells showed downregulated mRNA expression of stem cell factor and tenascin-c in vitro. Taken together, these results suggest a critical and novel role for the LPA/LPA4 axis in regulating BM stromal cells.
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Affiliation(s)
- Hidemitsu Igarashi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Noriyuki Akahoshi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Takayo Ohto-Nakanishi
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Daisuke Yasuda
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
| | - Satoshi Ishii
- Department of Immunology, Akita University Graduate School of Medicine, Akita, Japan
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Shimizu R, Torii H, Yasuda D, Hiraoka Y, Kitada N, Hashida T, Yoshimoto A, Kita T, Kume N. Serum Lipid Goal Attainment in Chronic Kidney Disease (CKD) Patients under the Japan Atherosclerosis Society (JAS) 2012 Guidelines. J Atheroscler Thromb 2015; 22:949-57. [PMID: 25843151 DOI: 10.5551/jat.29165] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM According to the Japan Atherosclerosis Society 2012 guidelines (JAS2012-GL), chronic kidney disease (CKD) has newly been added to the high-risk group in terms of atherosclerotic cardiovascular diseases. We therefore explored the lipid target level achievement rates under the JAS2012-GL in real-world clinical practice. METHODS We retrospectively reviewed the medical charts of patients who were hospitalized at the Nephrology Department at Kobe City Medical Center General Hospital in the period from April 1, 2012 to May 31, 2013 and explored the serum lipid target level achievement rates. Patients without lipid data or those undergoing regular dialysis because of chronic renal failure were excluded. In this study, the CKD group (CKD-G) did not include CKD patients under secondary prevention for coronary heart disease (CHD) or diabetes mellitus (DM). RESULTS The CKD-G included 146 (81.1%) of the 180 enrolled patients. According to the JAS2012-GL, 100% of the CKD-G patients were categorized into the high-risk group, although only 12.1% of the CKD-G subjects were at high risk according to the JAS2007-GL. Under the JAS2012-GL, the LDL cholesterol (LDL-C) and non-HDL cholesterol (non-HDL-C) target level achievement rates for CKD-G were 71.4% and 68.1%, respectively. According to the JAS2007-GL, these rates were 81.3% and 79.1%, respectively, and, under both guidelines, these rates were 71.7% and 72.1% for primary prevention DM and 66.7% and 66.7% for CHD, respectively. CONCLUSIONS After the revision of the JAS-GL in 2012, the LDL-C and non-HDL-C target level achievement rates for CKD-G were reduced by approximately 10%; however, they remained similar to those for DM and higher than those for CHD.
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Affiliation(s)
- Rumiko Shimizu
- Division of Clinical Pharmacy, Faculty of Pharmaceutical Sciences, Kobe Gakuin University
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Yasuda D, Imura Y, Ishii S, Shimizu T, Nakamura M. The atypical N-glycosylation motif, Asn-Cys-Cys, in human GPR109A is required for normal cell surface expression and intracellular signaling. FASEB J 2015; 29:2412-22. [PMID: 25690651 DOI: 10.1096/fj.14-267096] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 01/27/2015] [Indexed: 01/31/2023]
Abstract
Asparagine-linked glycosylation (N-glycosylation) is necessary for the proper folding of secreted and membrane proteins, including GPCRs. Thus, many GPCRs possess the N-glycosylation motif Asn-X-Ser/Thr at their N-termini and/or extracellular loops. We found that human GPR109A (hGPR109A) has an N-glycosylation site at Asn(17) in the N-terminal atypical motif, Asn(17)-Cys(18)-Cys(19). Why does hGPR109A require the atypical motif, rather than the typical sequence? Here we show that Asn(17)-Cys(18)-Cys(19) sequence of hGPR109A possesses 2 biologic roles. First, Asn(17)-X-Cys(19) contributed to hGPR109A N-glycosylation by acting as an atypical motif. This modification is required for the normal surface expression of hGPR109A, as evidenced by the reduced surface expression of the nonglycosylated mutants, hGPR109A/N17A, and the finding that hGPR109A/C19S and hGPR109A/C19T, which are N-glycosylated at Asn(17), exhibited expression similar to the wild-type receptor. Second, the X-Cys(18)-Cys(19) dicysteine is indispensable for hGPR109A function. Substitution of Cys(18) or Cys(19) residue to Ala impaired Gi-mediated signaling via hGPR109A. We propose the disulfide bond formations of these residues with other Cys existed in the extracellular loops for the proper folding. Together, these results suggest that the atypical motif Asn(17)-Cys(18)-Cys(19) is crucial for the normal surface trafficking and function of hGPR109A.
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Affiliation(s)
- Daisuke Yasuda
- *Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; Department of Immunology, Faculty of Medicine, Akita University, Akita, Japan; Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan; and Department of Life Science, Faculty of Science, Okayama University of Science, Okayama, Japan
| | - Yuki Imura
- *Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; Department of Immunology, Faculty of Medicine, Akita University, Akita, Japan; Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan; and Department of Life Science, Faculty of Science, Okayama University of Science, Okayama, Japan
| | - Satoshi Ishii
- *Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; Department of Immunology, Faculty of Medicine, Akita University, Akita, Japan; Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan; and Department of Life Science, Faculty of Science, Okayama University of Science, Okayama, Japan
| | - Takao Shimizu
- *Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; Department of Immunology, Faculty of Medicine, Akita University, Akita, Japan; Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan; and Department of Life Science, Faculty of Science, Okayama University of Science, Okayama, Japan
| | - Motonao Nakamura
- *Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Tokyo, Japan; Department of Immunology, Faculty of Medicine, Akita University, Akita, Japan; Department of Lipid Signaling, National Center for Global Health and Medicine, Tokyo, Japan; and Department of Life Science, Faculty of Science, Okayama University of Science, Okayama, Japan
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Yasuda D, Takahashi K, Ohe T, Nakamura S, Mashino T. Antioxidant activities of 5-hydroxyoxindole and its 3-hydroxy-3-phenacyl derivatives: The suppression of lipid peroxidation and intracellular oxidative stress. Bioorg Med Chem 2013; 21:7709-14. [DOI: 10.1016/j.bmc.2013.10.021] [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] [Received: 09/20/2013] [Revised: 10/15/2013] [Accepted: 10/17/2013] [Indexed: 10/26/2022]
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Yasuda D, Nakamura M. [Specific ligands rescue cell-surface expression of ER-retained GPCR]. Seikagaku 2013; 85:1007-1012. [PMID: 24364255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Affiliation(s)
- Daisuke Yasuda
- The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Motonao Nakamura
- The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Yasuda D, Takahashi K, Kakinoki T, Tanaka Y, Ohe T, Nakamura S, Mashino T. Synthesis, radical scavenging activity and structure–activity relationship of uric acid analogs. Med Chem Commun 2013. [DOI: 10.1039/c2md20287e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Iguchi H, Morita R, Yasuda D, Takayanagi R, Ikeda Y, Takada Y, Shimazoe T, Nawata H, Kono A. Alterations of the p53 tumor-suppressor gene and ki-ras oncogene in human pancreatic cancer-derived cell-lines with different metastatic potential. Oncol Rep 2012; 1:1223-7. [PMID: 21607521 DOI: 10.3892/or.1.6.1223] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Alterations of the p53 and Ki-ras genes were examined in 12 human pancreatic cancer-derived cell lines with different metastatic potential. Point mutations of the Ki-ras gene at codon 12 were found in 10 out of 12 cell lines (83%), while abnormalities of the p53 gene were identified in 8 out of 12 cell lines (67%) which included point mutations (n=7) and one base deletion (n=1). The comparison between alterations of the p53 and Ki-ras genes showed that all the 12 cell lines revealed alterations of both genes or one of these genes regardless of the metastatic potential. Further, same alterations of the Ki-ras gene or p53 gene were noted among the cell lines with increased metastatic potential and their parental cell lines. These findings suggest that alterations of the p53 gene, like the Ki-ras gene is a frequent event in pancreatic cancer, and could contribute cooperatively in the oncogenic steps of pancreatic cancer. It is also suggested that the genetic changes of the p53 and Ki-ras genes are not substantially associated with the metastatic potential in pancreatic cancer.
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Affiliation(s)
- H Iguchi
- SRL,HACHIOJI,TOKYO 192,JAPAN. KYUSHU UNIV,FAC MED,DEPT INTERNAL MED 3,FUKUOKA 812,JAPAN. KYUSHU NATL CANC CTR,DIV CHEMOTHERAPY,FUKUOKA 815,JAPAN
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Yasuda D, Iguchi H, Ikeda Y, Nishimura S, Steeg P, Misawa T, Nawata H, Kono A. Possible association of nm23 gene-expression and ki-ras point mutations with metastatic potential in human pancreatic cancer-derived cell-lines. Int J Oncol 2012; 3:641-4. [PMID: 21573412 DOI: 10.3892/ijo.3.4.641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Nm23 gene expression and Ki-ras point mutations of eight human pancreatic cancer-derived cell lines with different metastatic capabilities were studied. Nm23 gene expression was significantly reduced in the cell lines with a high metastatic potential as compared with those with a low meta static potential (p<0.05). The same mutation at codon 12 of the Ki-ras gene (Gly12 to Asp12) was found in all cell lines with a high metastatic potential. These findings suggest a possible association of metastatic potential with Nm23 gene expression as well as the mutation of Ki-ras gene in human pancreatic cancer.
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Affiliation(s)
- D Yasuda
- NATL KYUSHU CANC CTR,RES INST,FUKUOKA,JAPAN. NATL CANC CTR,RES INST,DIV BIOL,TOKYO 104,JAPAN. NIH,PATHOL LAB,BETHESDA,MD 20892
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Shigeta T, Yasuda D, Mori T, Yoshimitsu Y, Nakamura Y, Yoshida S, Asami T, Okamoto S, Matsuo T. Characterization of brassinosteroid-regulated proteins in a nuclear-enriched fraction of Arabidopsis suspension-cultured cells. Plant Physiol Biochem 2011; 49:985-95. [PMID: 21571540 DOI: 10.1016/j.plaphy.2011.04.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2011] [Accepted: 04/26/2011] [Indexed: 05/08/2023]
Abstract
To identify nuclear proteins involved in the brassinosteroid (BR) signaling pathway, a targeted proteomic approach was applied to Arabidopsis thaliana suspension-cultured T87 cells. Cell growth was promoted by 0.1 μM brassinolide (BL) and inhibited by 5 μM brassinazole (Brz). Analysis of BR-regulated proteins in nuclear-enriched fractions was carried out using two-dimensional polyacrylamide gel electrophoresis with a special fluorescent dye. Proteins of interest were identified by correlating normalized spot volume of proteins on the gels with cellular BR level (Brz-treated cells, extremely low level of BRs; control cells, normal level of BRs; BL-treated cells, high level of BRs). A number of BR-responsive proteins were detected and some of these proteins were identified by nano-liquid chromatography-tandem mass spectrometry after enzymatic digestion. Fluctuations in eight identified nuclear proteins in BL-treated cells were investigated in the first 12 h of treatment. Three nuclear BR-responsive proteins, Nucleosome Assembly Protein (NAP) 1;1, Band 7 Family Protein, and Vernalization Independence 3, significantly decreased during this time. Meanwhile, NAP1;2, S-Adenosylmethionine Synthetase 2, and 60S Ribosomal Protein L14 increased markedly over time. Since some of these proteins are reportedly related to chromosome remodeling, cell growth induced by BL may involve chromatin remodeling. Interestingly, NAP1;2 was found to be post-translationally modified in response to cellular BR levels. Our study of quantitative protein changes in the nucleus provides valuable insight into BR-induced cellular and physiological responses.
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Affiliation(s)
- Tomoaki Shigeta
- Course of Biological Science and Technology, The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima 890-0065, Japan
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Nakamura M, Yasuda D, Hirota N, Shimizu T. Specific ligands as pharmacological chaperones: The transport of misfolded G-protein coupled receptors to the cell surface. IUBMB Life 2010; 62:453-9. [PMID: 20503438 DOI: 10.1002/iub.344] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In the endoplasmic reticulum (ER), quality control mechanisms distinguish between correctly and incorrectly folded structures to ensure that aberrant proteins are not processed along the secretory pathway. Numerous studies have demonstrated the functional rescue of ER-retained, aberrant proteins by small membrane permeable molecules called pharmacological chaperones. Pharmacological chaperones can bind to misfolded proteins, including G-protein coupled receptors (GPCRs), and promote their correct folding and export from the ER. Recently, common structural features of GPCRs have been uncovered, including the eighth helical domain in the C-terminal tail and conserved residues in the transmembrane domains. However, little is known about the importance of these features in signaling and intracellular trafficking, because receptors deficient in these domains are likely retained in the ER due to misfolding. In this review, we summarize the current knowledge about the requirement of these consensus domains and amino acid residues for the passing through the quality control of the ER. Furthermore, we propose the utilization of membrane permeable ligands for the transport of their cognate, ER-retained GPCRs to the cell surface. The chaperone activity of these ligands allows us to perform functional analyses of the structure-deficient receptors after their trafficking to the cell surface.
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Affiliation(s)
- Motonao Nakamura
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, The University of Tokyo, Hongo, Tokyo, Japan.
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Maeda T, Honda A, Mashimo Y, Takeoka Y, Yasuda D, Yoshimura N, Kusano J, Tsukamoto K, Ishikawa T, Kinoshita M, Matsuzaki Y, Teramoto T. MS14 SEX DIFFERENCES IN EFFECTS OF NPC1L1 GENE POLYMORPHISM ON CHOLESTEROL ABSORPTION. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70515-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Nakamura K, Akiho H, Ochiai T, Motomura Y, Higuchi N, Okamoto R, Matsui N, Yasuda D, Akahoshi K, Kabemura T, Ihara E, Harada N, Ito T, Takayanagi R. Randomized controlled trial: roxatidine vs omeprazole for non-erosive reflux disease. Hepatogastroenterology 2010; 57:497-500. [PMID: 20698216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
BACKGROUND/AIMS Proton pump inhibitor (PPI) therapy is considered as the first choice for treatment of non-erosive reflux disease (NERD). However, NERD is less sensitive to PPIs than erosive gastroesophageal reflux disease (GERD) and the differences between PPIs and H2 receptor antagonists are less evident in NERD than in erosive GERD. Since gastric acid secretion is lower in the Japanese population than in Western populations, we aimed to investigate whether PPI therapy is really necessary for NERD patients in Japan. METHODOLOGY Thirty-three symptomatic endoscopically diagnosed NERD patients were randomly assigned to receive roxatidine acetate 75 mg twice daily (n = 16) or omeprazole 20 mg once daily (n = 17). Gastrointestinal symptoms were assessed using the Gastrointestinal Symptom Rating Scale at baseline and after 4 and 8 weeks of treatment. RESULTS Both roxatidine and omeprazole significantly improved the heartburn score at 4 and 8 weeks. The clinical response rates did not differ between roxatidine and omeprazole. Both roxatidine and omeprazole significantly relieved not only reflux but also abdominal pain and indigestion. The degrees of improvement did not differ between the two groups. CONCLUSION Roxatidine relieved the symptoms of NERD patients with similar effectiveness to omeprazole. Therefore, roxatidine may be a good choice for NERD treatment.
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Affiliation(s)
- Kazuhiko Nakamura
- Department of Medicine and Bioregulatory Science, Graduate School of Medical Sciences, Kyushu University, 3-1-1, Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
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Nakamura M, Hirota N, Yasuda D, Hashidate T, Yamaguchi S, Nagamune T, Shimizu T. Requirement of conserved amino acid residues for ER‐export and recycling of platelet‐activating factor receptor. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.lb83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Satoshi Yamaguchi
- Dept. of Chemistry and BiotechnologyGraduate School of EngineeringThe University of TokyoTokyoJapan
| | - Teruyuki Nagamune
- Dept. of Chemistry and BiotechnologyGraduate School of EngineeringThe University of TokyoTokyoJapan
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Yasuda D, Hirota N, Hashidate T, Shimizu T, Nakamura M. Helix 8 for ER Export of Leukotriene B
4
type‐2 Receptor (BLT2). FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.lb87] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Daisuke Yasuda
- Department of Biochemistry and Molecular BiologyThe University of TokyoTokyoJapan
| | - Nobuaki Hirota
- Department of Biochemistry and Molecular BiologyThe University of TokyoTokyoJapan
| | - Tomomi Hashidate
- Department of Biochemistry and Molecular BiologyThe University of TokyoTokyoJapan
| | - Takao Shimizu
- Department of Biochemistry and Molecular BiologyThe University of TokyoTokyoJapan
| | - Motonao Nakamura
- Department of Biochemistry and Molecular BiologyThe University of TokyoTokyoJapan
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Shimizu Y, Aoki T, Kusano T, Matsuda K, Enami Y, Yasuda D, Koizumi T, Niiya T, Murai N, Kato H, Kusano M, Murakami M. Natural course of the remnant hepatic functional reserve as estimated by technetium-99m-galactosyl human serum albumin scintigraphy after a hepatectomy. J Gastroenterol 2010; 45:308-16. [PMID: 19894018 DOI: 10.1007/s00535-009-0144-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 09/20/2009] [Indexed: 02/04/2023]
Abstract
BACKGROUND Technetium-99m-galactosyl human serum albumin (GSA) scintigraphy provides an accurate estimation of the hepatic functional reserve but is not applied after a hepatectomy. The aim of this study was to elucidate the natural course of the remnant hepatic functional reserve (RHFR) after hepatectomy by GSA scintigraphy. METHODS Eighty-six patients (partial hepatic resection, Hr0 = 46; sectionectomy, Hr1 = 21; bisectionectomy, Hr2 = 19) classified as Child-Pugh class A before the hepatectomy were enrolled, and GSA scintigraphy to detect HH15 (uptake ratio of the heart at 15 min to that at 3 min) and LHL15 (uptake ratio of the liver at 15 min to the liver plus the heart at 15 min) was performed periodically before and after the hepatectomy. HH15, LHL15, and the percentages of patients that recovered to the preoperative levels of these entities were estimated. In addition, hematobiochemical tests and the remnant liver volume were also periodically monitored. RESULTS HH15 and LHL15 levels deteriorated until 2 months postoperatively (PO) after the procedure and subsequently recovered to the preoperative levels at 6 months PO in Hr0 patients. In Hr1 patients, but not in Hr2 patients, these levels also deteriorated until 3 months PO and had improved by 6 months after the surgery. Only 40% of the patients showed recovery to the preoperative levels by 6 months PO in the Hr0 group; furthermore, the percentage of patients who showed recovery to the preoperative levels by 6 months PO was under 40% in the Hr1 group and around 10% in the Hr2 group. However, the results of hematobiochemical tests and the remnant liver volume in all types of hepatectomies were rapidly normalized after the hepatectomy. CONCLUSIONS Remnant hepatic functional reserve estimated by GSA scintigraphy revealed that a larger resected liver volume induced both more serious and continued remnant hepatic dysfunction in comparison to results shown by hematobiochemical tests, while the functional regeneration was also appreciably slower and more gradual in comparison to the volume regeneration.
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Affiliation(s)
- Yoshinori Shimizu
- Division of Gastroenterological and General Surgery, Department of Surgery, Showa University School of Medicine, 1-5-8 Hatanodai, Shinagawa-ku, Tokyo, 142-8666, Japan.
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Hirota N, Yasuda D, Hashidate T, Yamamoto T, Yamaguchi S, Nagamune T, Nagase T, Shimizu T, Nakamura M. Amino acid residues critical for endoplasmic reticulum export and trafficking of platelet-activating factor receptor. J Biol Chem 2009; 285:5931-40. [PMID: 20007715 DOI: 10.1074/jbc.m109.066282] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
Several residues are conserved in the transmembrane domains (TMs) of G-protein coupled receptors. Here we demonstrate that a conserved proline, Pro(247), in TM6 of platelet-activating factor receptor (PAFR) is required for endoplasmic reticulum (ER) export and trafficking after agonist-induced internalization. Alanine-substituted mutants of the conserved residues of PAFRs, including P247A, were retained in the ER. Because a PAFR antagonist, Y-24180, acted as a pharmacological chaperone to rescue ER retention, this retention is due to misfolding of PAFR. Methylcarbamyl (mc)-PAF, a PAFR agonist, did not increase the cell surface expression of P247A, even though another ER-retained mutant, D63A, was effectively trafficked. Signaling and accumulation of the receptors in the early endosomes were observed in the mc-PAF-treated P247A-expressing cells, suggesting that P247A was trafficked to the cell surface by mc-PAF, and thereafter disappeared from the surface due to aberrant trafficking, e.g. enhanced internalization, deficiency in recycling, and/or accelerated degradation. The aberrant trafficking was confirmed with a sortase-A-mediated method for labeling cell surface proteins. These results demonstrate that the conserved proline in TM6 is crucial for intracellular trafficking of PAFR.
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Affiliation(s)
- Nobuaki Hirota
- Department of Biochemistry and Molecular Biology, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Kobayashi T, Yasuda D, Li YY, Kubota K, Harada H, Yu HQ. Characterization of start-up performance and archaeal community shifts during anaerobic self-degradation of waste-activated sludge. Bioresour Technol 2009; 100:4981-8. [PMID: 19556123 DOI: 10.1016/j.biortech.2009.05.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2009] [Revised: 05/11/2009] [Accepted: 05/12/2009] [Indexed: 05/07/2023]
Abstract
Successful start-up strategy for anaerobic digestion of waste-activated sludge using internal inoculum and relationship between the shift of methanogenic community and the digester performance during start-up was investigated. Combination of TS control of inoculum and batch operation during early days enabled the successful start-up operation without serious volatile fatty acid accumulation, followed by the stable continuous operation. However, the propionate degradation was rate-limiting step during the batch operation. The results of real-time quantitative polymerase chain reaction analysis suggested that there was a correlation between the population of the genus Methanosarcina and the methane production rate coupled with acetate consumption during batch operation, and the results of terminal-restriction fragment length polymorphism (T-RFLP) revealed that the increasing intensity of T-RF peaks of hydrogenotrophic methanogens was associated with a decrease in the level of C3-acids.
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Affiliation(s)
- Takuro Kobayashi
- Department of Civil and Environmental Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
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Matsuda H, Ninomiya K, Morikawa T, Yasuda D, Yamaguchi I, Yoshikawa M. Hepatoprotective amide constituents from the fruit of Piper chaba: Structural requirements, mode of action, and new amides. Bioorg Med Chem 2009; 17:7313-23. [PMID: 19775895 DOI: 10.1016/j.bmc.2009.08.050] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2009] [Revised: 08/18/2009] [Accepted: 08/19/2009] [Indexed: 12/18/2022]
Abstract
The 80% aqueous acetone extract from the fruit of Piper chaba (Piperaceae) was found to have hepatoprotective effects on D-galactosamine (D-GalN)/lipopolysaccharide-induced liver injury in mice. From the ethyl acetate-soluble fraction, three new amides, piperchabamides E, G, and H, 33 amides, and four aromatic constituents were isolated. Among the isolates, several amide constituents inhibited D-GalN/tumor necrosis factor-alpha (TNF-alpha)-induced death of hepatocytes, and the following structural requirements were suggested: (i) the amide moiety is essential for potent activity; and (ii) the 1,9-decadiene structure between the benzene ring and the amide moiety tended to enhance the activity. Moreover, a principal constituent, piperine, exhibited strong in vivo hepatoprotective effects at doses of 5 and 10 mg/kg, po and its mode of action was suggested to depend on the reduced sensitivity of hepatocytes to TNF-alpha.
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Affiliation(s)
- Hisashi Matsuda
- Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
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Yoshimura N, Kinoshita M, Maeda T, Kusano J, Yasuda D, Takeoka Y, Murata K, Fujita M, Ishikawa T, Teramoto T. Abstract: P417 ISOLATION AND CHARACTERIZATION OF APOLIPOPROTEIN B48CONTAINING LIPOPROTEINS WITH A MONOCLONAL ANTIBODY AGAINST APOLIPOPROTEIN B48. ATHEROSCLEROSIS SUPP 2009. [DOI: 10.1016/s1567-5688(09)70712-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yasuda D, Okuno T, Yokomizo T, Hori T, Hirota N, Hashidate T, Miyano M, Shimizu T, Nakamura M. Helix 8 of leukotriene B4type‐2 receptor is required for the folding to pass the quality control in the endoplasmic reticulum. FASEB J 2009; 23:1470-81. [DOI: 10.1096/fj.08-125385] [Citation(s) in RCA: 23] [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] [Indexed: 11/11/2022]
Affiliation(s)
- Daisuke Yasuda
- Department of Biochemistry and Molecular BiologyFaculty of MedicineThe University of TokyoTokyoJapan
| | - Toshiaki Okuno
- Department of Medical BiochemistryGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Takehiko Yokomizo
- Department of Medical BiochemistryGraduate School of Medical SciencesKyushu UniversityFukuokaJapan
| | - Tetsuya Hori
- Structural Biophysics LaboratoryRIKEN Harima Institute at SpringHyogo8Japan
| | - Nobuaki Hirota
- Department of Biochemistry and Molecular BiologyFaculty of MedicineThe University of TokyoTokyoJapan
| | - Tomomi Hashidate
- Department of Biochemistry and Molecular BiologyFaculty of MedicineThe University of TokyoTokyoJapan
| | - Masashi Miyano
- Structural Biophysics LaboratoryRIKEN Harima Institute at SpringHyogo8Japan
| | - Takao Shimizu
- Department of Biochemistry and Molecular BiologyFaculty of MedicineThe University of TokyoTokyoJapan
| | - Motonao Nakamura
- Department of Biochemistry and Molecular BiologyFaculty of MedicineThe University of TokyoTokyoJapan
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Kusano T, Aoki T, Yasuda D, Matsumoto S, Jin Z, Nishino N, Hayashi K, Odaira M, Yamada K, Koizumi T, Izumida Y, Mitamura K, Enami Y, Niiya T, Murai N, Kato H, Shimizu Y, Kou K, Furukawa Y, Matsusita M, Todo S, Shioda S, Kusano M. Microencapsule technique protects hepatocytes from cryoinjury. Hepatol Res 2008; 38:593-600. [PMID: 18070054 DOI: 10.1111/j.1872-034x.2007.00311.x] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
AIM Hepatocyte transplantation is a potential alternative to whole organ liver transplantation. To realize this procedure, a hepatocyte bank system capable of supplying large numbers of hepatocytes must be established. We previously reported an easy method for cryopreserving hepatocytes using a microencapsulation technique. Here, we investigated how cryoinjury to microencapsulated hepatocytes could be avoided during cryopreservation. METHODS Hepatocytes from Sprague-Dawley rats were harvested in situ using a two-step ethylenediaminetetraacetic acid (EDTA)/collagenase digestion protocol. The cells were microencapsulated using alginate-poly L-lysine. The microencapsulated hepatocytes were put into vials and immediately immersed in liquid nitrogen. The growth of ice crystals in the vials containing the microencapsulated hepatocytes was observed using cryomicroscopy. The microencapsulated hepatocytes were sectioned for ultrastructural examination to investigate their intracellular conditions. Finally, total RNA was isolated from the cryopreserved microencapsulated hepatocytes and analyzed for hepatocyte nuclear factor (HNF) using reverse transcriptase polymerase chain reaction (RT-PCR) analysis. RESULTS Cryomicroscopy showed that the alginate microencapsulation technique protected the hepatocytes from physical damage caused by the growth of extracellular ice crystals. Ultrastructural examination revealed that the intracellular environment of the microencapsulated hepatocytes was maintained. The RT-PCR analysis additionally suggested that the alginate gel also maintained the HNF level. CONCLUSION Our microencapsulation technique protects hepatocytes from cryoinjury. This novel technique could be utilized by hepatocyte banks.
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Affiliation(s)
- Tomokazu Kusano
- General and Gastroenterological Surgery, Showa University School of Medicine, Tokyo, Japan
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Odaira M, Aoki T, Miyamoto Y, Yasuhara R, Jin Z, Yu J, Nishino N, Yamada K, Kusano T, Hayashi K, Yasuda D, Koizumi T, Mitamura K, Enami Y, Niiya T, Murai N, Kato H, Shimizu Y, Kamijyo R, Kusano M. Cold preservation of the liver with oxygenation by a two-layer method. J Surg Res 2008; 152:209-17. [PMID: 18701117 DOI: 10.1016/j.jss.2008.03.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2007] [Revised: 03/04/2008] [Accepted: 03/25/2008] [Indexed: 11/19/2022]
Abstract
BACKGROUND The two-layer method (TLM) has recently been found to be superior to simple cold storage in University of Wisconsin (UW) solution as a means of pancreas preservation for islet transplantation. In this study, we investigated whether TLM would result in better hepatocyte function over UW cold storage and if it could be applied to hepatocyte transplantation. MATERIALS AND METHODS Hepatocytes from male Sprague Dawley rat livers were isolated and divided into three groups: a non-preservation group (group 1), a 10-h preservation group (group 2), and a 24-h preservation group (group 3). Groups 2 and 3 were then divided into three subgroups: a group preserved by the TLM (subgroup a), a group preserved in UW solution (subgroup b), and a group preserved in water (subgroup c). Isolated hepatocytes were evaluated for cell yield, viability, and adenosine triphosphate level after preservation. Hepatocytes were either cultured or transplanted. RESULTS Although no differences in cell yield or morphological findings were observed between any of the groups, TLM significantly improved hepatocyte viability and adenosine triphosphate levels in comparison with UW cold storage. Albumin production or urea synthesis were significantly higher in subgroup 3a than in subgroup 3b at almost all time points. Surprisingly, after hepatocyte transplantation, the serum albumin level in subgroup 2a was significantly higher than in subgroup 2b at every time point. CONCLUSIONS The results of this study demonstrated that liver preservation by the TLM before hepatocyte isolation might be beneficial and will be useful in the field of hepatotocyte transplantation.
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Affiliation(s)
- Masanori Odaira
- Division of General and Gastroenterological Surgery, Department of Surgery, School of Medicine, Showa University, Tokyo, Japan.
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Matsuda H, Ninomiya K, Morikawa T, Yasuda D, Yamaguchi I, Yoshikawa M. Protective effects of amide constituents from the fruit of Piper chaba on D-galactosamine/TNF-alpha-induced cell death in mouse hepatocytes. Bioorg Med Chem Lett 2008; 18:2038-42. [PMID: 18289853 DOI: 10.1016/j.bmcl.2008.01.101] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2007] [Revised: 01/25/2008] [Accepted: 01/28/2008] [Indexed: 12/18/2022]
Abstract
The methanolic extract from the fruit of Piper chaba (Piperaceae) was found to have a hepatoprotective effect on D-galactosamine (D-GalN)/lipopolysaccharide (LPS)-induced liver injury in mice. From the ethyl acetate-soluble fraction, a new amide constituent named piperchabamide E together with twenty known amide constituents (e.g., piperine, piperchabamides A-D, and piperanine) and two aromatic constituents were isolated as the hepatoprotective constituents. With regard to structure-activity relationships, the amide moiety and the 1,9-decadiene structure between the benzene ring and amide moiety were suggested to be important for strong inhibition of D-GalN/tumor necrosis factor-alpha (TNF-alpha)-induced death of hepatocytes. Furthermore, a principal amide constituent, piperine, dose-dependently inhibited increase in serum GPT and GOT levels at doses of 2.5-10 mg/kg (p.o.) in D-GalN/LPS-treated mice, and this inhibitory effect was suggested to depend on the reduced sensitivity of hepatocytes to TNF-alpha.
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Affiliation(s)
- Hisashi Matsuda
- Kyoto Pharmaceutical University, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
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