Miura S

References (9)

Title : Lipoprotein Lipase Up-regulation in Hepatic Stellate Cells Exacerbates Liver Fibrosis in Nonalcoholic Steatohepatitis in Mice - Teratani_2019_Hepatol.Commun_3_1098
Author(s) : Teratani T , Tomita K , Furuhashi H , Sugihara N , Higashiyama M , Nishikawa M , Irie R , Takajo T , Wada A , Horiuchi K , Inaba K , Hanawa Y , Shibuya N , Okada Y , Kurihara C , Nishii S , Mizoguchi A , Hozumi H , Watanabe C , Komoto S , Nagao S , Yamamoto J , Miura S , Hokari R , Kanai T
Ref : Hepatol Commun , 3 :1098 , 2019
Abstract : Lipoprotein lipase (LPL) plays a central role in incorporating plasma lipids into tissues and regulates lipid metabolism and energy balance in the human body. Conversely, LPL expression is almost absent in normal adult livers. Therefore, its physiological role in the liver remains unknown. We aimed to elucidate the role of LPL in the pathophysiology of nonalcoholic steatohepatitis (NASH), a hepatic manifestation of obesity. Hepatic stellate cell (HSC)-specific LPL-knockout (Lpl(HSC-KO) ) mice, LPL-floxed (Lpl(fl/fl) ) mice, or double-mutant toll-like receptor 4-deficient (Tlr4(-/-) ) Lpl(HSC-KO) mice were fed a high-fat/high-cholesterol diet for 4 weeks to establish the nonalcoholic fatty liver model or an high-fat/high-cholesterol diet for 24 weeks to establish the NASH model. Human samples, derived from patients with nonalcoholic fatty liver disease, were also examined. In human and mouse NASH livers, serum obesity-related factors, such as free fatty acid, leptin, and interleukin-6, dramatically increased the expression of LPL, specifically in HSCs through signal transducer and activator of transcription 3 signaling, as opposed to that in hepatocytes or hepatic macrophages. In the NASH mouse model, liver fibrosis was significantly reduced in Lpl(HSC-KO) mice compared with that in Lpl(fl/fl) mice. Nonenzymatic LPL-mediated cholesterol uptake from serum lipoproteins enhanced the accumulation of free cholesterol in HSCs, which amplified TLR4 signaling, resulting in the activation of HSCs and progression of hepatic fibrosis in NASH. Conclusion: The present study reveals the pathophysiological role of LPL in the liver, and furthermore, clarifies the pathophysiology in which obesity, as a background factor, exacerbates NASH. The LPL-mediated HSC activation pathway could be a promising therapeutic target for treating liver fibrosis in NASH.
ESTHER : Teratani_2019_Hepatol.Commun_3_1098
PubMedSearch : Teratani_2019_Hepatol.Commun_3_1098
PubMedID: 31388630

Title : Identification of valproic acid glucuronide hydrolase as a key enzyme for the interaction of valproic acid with carbapenem antibiotics - Suzuki_2010_Drug.Metab.Dispos_38_1538
Author(s) : Suzuki E , Yamamura N , Ogura Y , Nakai D , Kubota K , Kobayashi N , Miura S , Okazaki O
Ref : Drug Metabolism & Disposition: The Biological Fate of Chemicals , 38 :1538 , 2010
Abstract : Plasma levels of valproic acid (VPA) are decreased by concomitant use with carbapenem antibiotics, such as panipenem (PAPM). One of the plausible mechanisms of this interaction is the inhibition of VPA glucuronide (VPA-G) hydrolysis by carbapenems in the liver. To elucidate this interaction mechanism, we purified VPA-G hydrolase from human liver cytosol, in which the hydrolytic activity was mainly located. After chromatographic purification, the VPA-G hydrolase was identified as acylpeptide hydrolase (APEH). APEH-depleted cytosol, prepared by an immunodepletion method, completely lacked the hydrolytic activity. These results demonstrate that APEH is a single enzyme involved in PAPM-sensitive VPA-G hydrolysis in cytosol. In addition, the hydrolytic activity of recombinant human APEH was inhibited by PAPM and the inhibition profile by typical esterase inhibitors (diisopropyl fluorophosphate, 5,5'-dithiobis(2-nitrobenzoic acid), p-chloromercuribenzoic acid, and d-saccharic acid 1,4-lactone) was similar to that of human liver cytosol. Cytosolic VPA-G hydrolase activity was slightly inhibited by cholinesterase and carboxylesterase inhibitors. beta-Glucuronidase activity remained in APEH-depleted cytosol, whereas VPA-G hydrolase activity was completely abolished. Thus, either cholinesterase, carboxylesterase, or beta-glucuronidase in cytosol would not be involved in VPA-G hydrolysis. Taken together, APEH plays a major role in the PAPM-sensitive VPA-G hydrolysis in the liver. These findings suggest that APEH could be a key enzyme for the drug interaction of VPA with carbapenems via VPA-G hydrolysis.
ESTHER : Suzuki_2010_Drug.Metab.Dispos_38_1538
PubMedSearch : Suzuki_2010_Drug.Metab.Dispos_38_1538
PubMedID: 20551238

Title : CS-8958, a prodrug of the novel neuraminidase inhibitor R-125489, demonstrates a favorable long-retention profile in the mouse respiratory tract - Koyama_2009_Antimicrob.Agents.Chemother_53_4845
Author(s) : Koyama K , Takahashi M , Oitate M , Nakai N , Takakusa H , Miura S , Okazaki O
Ref : Antimicrobial Agents & Chemotherapy , 53 :4845 , 2009
Abstract : CS-8958 is a prodrug of the pharmacologically active form R-125489, a selective neuraminidase inhibitor, and has long-acting anti-influenza virus activity in vivo. In this study, the tissue distribution profiles after a single intranasal administration of CS-8958 (0.5 micromol/kg of body weight) to mice were investigated, focusing especially on the retention of CS-8958 in the respiratory tract by comparing it with R-125489 and a marketed drug, zanamivir. After administration of [(14)C]CS-8958, radioactivity was retained in the respiratory tract over long periods. At 24 h postdose, the radioactivity concentrations after administration of [(14)C]CS-8958 were approximately 10-fold higher in both the trachea and the lung than those of [(14)C]R-125489 and [(14)C]zanamivir. The [(14)C]CS-8958-derived radioactivity present in these two tissues consisted both of unchanged CS-8958 and of R-125489 at 1 h postdose, while only R-125489, and no other metabolites, was detected at 24 h postdose. After administration of unlabeled CS-8958, CS-8958 was rapidly eliminated from the lungs, whereas the lung R-125489 concentration reached a maximum at 3 h postdose and gradually declined, with an elimination half-life of 41.4 h. The conversion of CS-8958 to R-125489 was observed in mouse trachea and lung S9 fractions and was inhibited by esterase inhibitors, such as diisopropylfluorophosphate and bis-p-nitrophenylphosphate. These results demonstrated that CS-8958 administered intranasally to mice was efficiently converted to R-125489 by a hydrolase(s) such as carboxylesterase, and then R-125489 was slowly eliminated from the respiratory tract. These data support the finding that CS-8958 has potential as a long-acting neuraminidase inhibitor, leading to significant efficacy as an anti-influenza drug by a single treatment.
ESTHER : Koyama_2009_Antimicrob.Agents.Chemother_53_4845
PubMedSearch : Koyama_2009_Antimicrob.Agents.Chemother_53_4845
PubMedID: 19687241

Title : Peg1\/Mest in obese adipose tissue is expressed from the paternal allele in an isoform-specific manner - Kamei_2007_FEBS.Lett_581_91
Author(s) : Kamei Y , Suganami T , Kohda T , Ishino F , Yasuda K , Miura S , Ezaki O , Ogawa Y
Ref : FEBS Letters , 581 :91 , 2007
Abstract : Paternally expressed 1 (Peg1)/mesoderm specific transcript (Mest) is an imprinted gene, which is only transcribed from the paternal (father's) allele. In some human cancer tissues, an alternatively spliced variant of PEG1/MEST mRNA using a different promoter of a distinct first exon is expressed from both paternal and maternal alleles. We previously reported that Peg1/Mest expression was markedly up-regulated in obese adipose tissue in mice. Moreover, transgenic overexpression of Peg1/Mest in the adipose tissue resulted in the enlargement of adipocytes in size. Given the potential pathophysiologic relevance in obesity, we examined the nature of increased expression of Peg1/Mest in obese adipose tissue. In obese adipose tissue, expression of Peg1/Mest was increased, but not that of other imprinted genes tested. The transcription rate of Peg1/Mest was increased in obese adipose tissue. We found at least four isoforms of mouse Peg1/Mest generated by use of the alternative first exons. We also demonstrated that the abundantly expressed Peg1/Mest in obese adipose tissue retained monoallelic expression. This is the first report of monoallelic induction of Peg1/Mest in adult tissues.
ESTHER : Kamei_2007_FEBS.Lett_581_91
PubMedSearch : Kamei_2007_FEBS.Lett_581_91
PubMedID: 17182038

Title : Genome sequence of the ultrasmall unicellular red alga Cyanidioschyzon merolae 10D - Matsuzaki_2004_Nature_428_653
Author(s) : Matsuzaki M , Misumi O , Shin IT , Maruyama S , Takahara M , Miyagishima SY , Mori T , Nishida K , Yagisawa F , Yoshida Y , Nishimura Y , Nakao S , Kobayashi T , Momoyama Y , Higashiyama T , Minoda A , Sano M , Nomoto H , Oishi K , Hayashi H , Ohta F , Nishizaka S , Haga S , Miura S , Morishita T , Kabeya Y , Terasawa K , Suzuki Y , Ishii Y , Asakawa S , Takano H , Ohta N , Kuroiwa H , Tanaka K , Shimizu N , Sugano S , Sato N , Nozaki H , Ogasawara N , Kohara Y , Kuroiwa T
Ref : Nature , 428 :653 , 2004
Abstract : Small, compact genomes of ultrasmall unicellular algae provide information on the basic and essential genes that support the lives of photosynthetic eukaryotes, including higher plants. Here we report the 16,520,305-base-pair sequence of the 20 chromosomes of the unicellular red alga Cyanidioschyzon merolae 10D as the first complete algal genome. We identified 5,331 genes in total, of which at least 86.3% were expressed. Unique characteristics of this genomic structure include: a lack of introns in all but 26 genes; only three copies of ribosomal DNA units that maintain the nucleolus; and two dynamin genes that are involved only in the division of mitochondria and plastids. The conserved mosaic origin of Calvin cycle enzymes in this red alga and in green plants supports the hypothesis of the existence of single primary plastid endosymbiosis. The lack of a myosin gene, in addition to the unexpressed actin gene, suggests a simpler system of cytokinesis. These results indicate that the C. merolae genome provides a model system with a simple gene composition for studying the origin, evolution and fundamental mechanisms of eukaryotic cells.
ESTHER : Matsuzaki_2004_Nature_428_653
PubMedSearch : Matsuzaki_2004_Nature_428_653
PubMedID: 15071595
Gene_locus related to this paper: cyam1-m1vi61 , cyam1-m1vhh9

Title : The draft genome of Ciona intestinalis: insights into chordate and vertebrate origins - Dehal_2002_Science_298_2157
Author(s) : Dehal P , Satou Y , Campbell RK , Chapman J , Degnan B , De Tomaso A , Davidson B , Di Gregorio A , Gelpke M , Goodstein DM , Harafuji N , Hastings KE , Ho I , Hotta K , Huang W , Kawashima T , Lemaire P , Martinez D , Meinertzhagen IA , Necula S , Nonaka M , Putnam N , Rash S , Saiga H , Satake M , Terry A , Yamada L , Wang HG , Awazu S , Azumi K , Boore J , Branno M , Chin-Bow S , DeSantis R , Doyle S , Francino P , Keys DN , Haga S , Hayashi H , Hino K , Imai KS , Inaba K , Kano S , Kobayashi K , Kobayashi M , Lee BI , Makabe KW , Manohar C , Matassi G , Medina M , Mochizuki Y , Mount S , Morishita T , Miura S , Nakayama A , Nishizaka S , Nomoto H , Ohta F , Oishi K , Rigoutsos I , Sano M , Sasaki A , Sasakura Y , Shoguchi E , Shin-I T , Spagnuolo A , Stainier D , Suzuki MM , Tassy O , Takatori N , Tokuoka M , Yagi K , Yoshizaki F , Wada S , Zhang C , Hyatt PD , Larimer F , Detter C , Doggett N , Glavina T , Hawkins T , Richardson P , Lucas S , Kohara Y , Levine M , Satoh N , Rokhsar DS
Ref : Science , 298 :2157 , 2002
Abstract : The first chordates appear in the fossil record at the time of the Cambrian explosion, nearly 550 million years ago. The modern ascidian tadpole represents a plausible approximation to these ancestral chordates. To illuminate the origins of chordate and vertebrates, we generated a draft of the protein-coding portion of the genome of the most studied ascidian, Ciona intestinalis. The Ciona genome contains approximately 16,000 protein-coding genes, similar to the number in other invertebrates, but only half that found in vertebrates. Vertebrate gene families are typically found in simplified form in Ciona, suggesting that ascidians contain the basic ancestral complement of genes involved in cell signaling and development. The ascidian genome has also acquired a number of lineage-specific innovations, including a group of genes engaged in cellulose metabolism that are related to those in bacteria and fungi.
ESTHER : Dehal_2002_Science_298_2157
PubMedSearch : Dehal_2002_Science_298_2157
PubMedID: 12481130
Gene_locus related to this paper: cioin-141645 , cioin-147959 , cioin-150181 , cioin-154370 , cioin-ACHE1 , cioin-ACHE2 , cioin-cxest , cioin-f6qcp0 , cioin-f6r8z1 , cioin-f6u176 , cioin-f6vac9 , cioin-f6x584 , cioin-f6xa69 , cioin-f6y403 , cioin-h2xqb4 , cioin-H2XTI0 , cioin-F6T1M3 , cioin-H2XUP7 , cioin-CIN.7233 , cioin-F6V269 , cioin-Cin16330 , cioin-h2xua2 , cioin-f6vaa5 , cioin-f6v9x6 , cioin-f6swc9 , cioin-f7amz2 , cioin-f6s021 , cioin-h2xxq9 , cioin-h2xne6 , cioin-f6ynr2

Title : Screening of genes involved in isooctane tolerance in Saccharomyces cerevisiae by using mRNA differential display - Miura_2000_Appl.Environ.Microbiol_66_4883
Author(s) : Miura S , Zou W , Ueda M , Tanaka A
Ref : Applied Environmental Microbiology , 66 :4883 , 2000
Abstract : A Saccharomyces cerevisiae strain, KK-211, isolated by the long-term bioprocess of stereoselective reduction in isooctane, showed extremely high tolerance to the solvent, which is toxic to yeast cells, but, in comparison with its wild-type parent, DY-1, showed low tolerance to hydrophilic organic solvents, such as dimethyl sulfoxide and ethanol. In order to detect the isooctane tolerance-associated genes, mRNA differential display (DD) was employed using mRNAs isolated from strains DY-1 and KK-211 cultivated without isooctane, and from strain KK-211 cultivated with isooctane. Thirty genes were identified as being differentially expressed in these three types of cells and were classified into three groups according to their expression patterns. These patterns were further confirmed and quantified by Northern blot analysis. On the DD fingerprints, the expression of 14 genes, including MUQ1, PRY2, HAC1, AGT1, GAC1, and ICT1 (YLR099c) was induced, while the expression of the remaining 16 genes, including JEN1, PRY1, PRY3, and KRE1, was decreased, in strain KK-211 cultivated with isooctane. The genes represented by HAC1, PRY1, and ICT1 have been reported to be associated with cell stress, and AGT1 and GAC1 have been reported to be involved in the uptake of trehalose and the production of glycogen, respectively. MUQ1 and KRE1, encoding proteins associated with cell surface maintenance, were also detected. Based on these results, we concluded that alteration of expression levels of multiple genes, not of a single gene, might be the critical determinant for isooctane tolerance in strain KK-211.
ESTHER : Miura_2000_Appl.Environ.Microbiol_66_4883
PubMedSearch : Miura_2000_Appl.Environ.Microbiol_66_4883
PubMedID: 11055939
Gene_locus related to this paper: yeast-ict1

Title : Cholesterol-mediated changes of neutral cholesterol esterase activity in macrophages. Mechanism for mobilization of cholesteryl esters in lipid droplets by HDL - Miura_1997_Arterioscler.Thromb.Vasc.Biol_17_3033
Author(s) : Miura S , Chiba T , Mochizuki N , Nagura H , Nemoto K , Tomita I , Ikeda M , Tomita T
Ref : Arterioscler Thromb Vasc Biol , 17 :3033 , 1997
Abstract : Cholesteryl esters (CE) in lipid droplets undergo a continual cycle of hydrolysis and reesterification by neutral cholesterol esterase (N-CEase) and acyl CoA:cholesterol acyltransferase (ACAT), respectively. The mechanism by which HDL mobilizes CE from lipid droplets in J774 A.1 cells was investigated, focusing on N-CEase activity. We asked whether HDL enhances the activity and, if so, what signals induce the change of the activity. An incubation of cells with HDL enhanced the decline of cholesteryl-[l-14C]-oleate in foam cells and increased N-CEase activity in the supernatant of cell homogenate in a concentration-dependent manner, whereas incubation with LDL decreased the activity. In addition, N-CEase activity was fivefold higher when cells were cultured in 10% lipoprotein-deficient serum (LPDS) medium (2 micrograms cholesterol/mL) than when cultured in 10% fetal calf serum medium (31 micrograms cholesterol/mL), suggesting that changes in N-CEase activity are mediated by cholesterol. An addition of cholesterol (0 to 30 micrograms/mL) in LPDS medium markedly inhibited N-CEase activity with a concomitant increase in cellular cholesterol concentration. This inhibitory effect of cholesterol was also observed in mouse peritoneal macrophages. In vitro addition of cholesterol did not affect N-CEase activity. Treatment of cells with HMG-CoA reductase inhibitors enhanced N-CEase activity, whereas ACAT inhibitor decreased the activity. Northern blot analysis of N-CEase mRNA showed that the expression was not altered by the presence of cholesterol in LPDS medium. These results suggest that cholesterol downregulates N-CEase activity, probably through cholesterol-dependent appearance of some factors.
ESTHER : Miura_1997_Arterioscler.Thromb.Vasc.Biol_17_3033
PubMedSearch : Miura_1997_Arterioscler.Thromb.Vasc.Biol_17_3033
PubMedID: 9409290

Title : Methicillin-resistant Staphylococcus aureus: colonization and development of infection in patients with haematological disorders - Hagiwara_1995_Eur.J.Haematol_55_267
Author(s) : Hagiwara S , Miwa A , Yoshida M , Imagawa S , Komatu N , Muroi K , Sasaki R , Hatake K , Sakamoto S , Miura S
Ref : European Journal of Haematology , 55 :267 , 1995
Abstract : A retrospective study of 53 patients with haematological disorders whose bacterial cultures were positive for methicillin-resistant Staphylococcus aureus (MRSA), was performed to analyse the risk factors for MRSA infection, and the prognostic factors. Sixteen patients showed colonization by MRSA but never developed infection(C), 16 showed colonization and subsequent infection(C-I), while 21 had MRSA infection at the time of first culture (I). Poor performance status, thrombocytopenia, increased serum urea nitrogen and decreased serum cholinesterase were more prominent in (I) than (C) + (C-I). The risk factors associated with the development of infection from colonization were age and serum cholinesterase. In addition, lower respiratory tract infection as a type of infection, non-remission status of the haematological malignancy and an inappropriate antibiotic therapy were associated with a poor prognosis for MRSA infection.
ESTHER : Hagiwara_1995_Eur.J.Haematol_55_267
PubMedSearch : Hagiwara_1995_Eur.J.Haematol_55_267
PubMedID: 7589346