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  1. Article ; Online: Expression, purification and preliminary crystallographic analysis of bacterial transmembrane protein EfeU for iron import.

    Okumura, Kenji / Mikami, Bunzo / Oiki, Sayoko / Ogura, Kohei / Hashimoto, Wataru

    Protein expression and purification

    2024  Volume 219, Page(s) 106487

    Abstract: The bacterial Efe system functions as an importer of free ... ...

    Abstract The bacterial Efe system functions as an importer of free Fe
    MeSH term(s) Escherichia coli/genetics ; Escherichia coli/metabolism ; Crystallography, X-Ray ; Escherichia coli Proteins/genetics ; Escherichia coli Proteins/chemistry ; Escherichia coli Proteins/metabolism ; Escherichia coli Proteins/isolation & purification ; Iron/metabolism ; Iron/chemistry ; Gene Expression ; Recombinant Proteins/chemistry ; Recombinant Proteins/genetics ; Recombinant Proteins/isolation & purification ; Recombinant Proteins/metabolism ; Recombinant Proteins/biosynthesis ; Iron-Binding Proteins/chemistry ; Iron-Binding Proteins/genetics ; Iron-Binding Proteins/isolation & purification ; Iron-Binding Proteins/metabolism
    Chemical Substances Escherichia coli Proteins ; Iron (E1UOL152H7) ; Recombinant Proteins ; Iron-Binding Proteins
    Language English
    Publishing date 2024-04-23
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1055455-5
    ISSN 1096-0279 ; 1046-5928
    ISSN (online) 1096-0279
    ISSN 1046-5928
    DOI 10.1016/j.pep.2024.106487
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: Ethylene polymerization using

    Kimura, Nanako / Takeuchi, Daisuke / Ogura, Sayoko / Takazawa, Ayaka / Kakiage, Masaki / Yamanobe, Takeshi / Uehara, Hiroki

    Designed monomers and polymers

    2023  Volume 26, Issue 1, Page(s) 182–189

    Abstract: Various transition metal catalysts have been utilized for ethylene polymerization. Silver catalysts have attracted less attention as the catalysts, but are potential for production of high molecular weight polyethylene. Herein, we report that silver ... ...

    Abstract Various transition metal catalysts have been utilized for ethylene polymerization. Silver catalysts have attracted less attention as the catalysts, but are potential for production of high molecular weight polyethylene. Herein, we report that silver complexes with various
    Language English
    Publishing date 2023-07-05
    Publishing country England
    Document type Journal Article
    ZDB-ID 2045059-X
    ISSN 1568-5551 ; 1385-772X
    ISSN (online) 1568-5551
    ISSN 1385-772X
    DOI 10.1080/15685551.2023.2229641
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Antihypertensive drug therapy for women with non-severe hypertensive disorders of pregnancy: a systematic review and meta-analysis.

    Ogura, Sayoko / Suzuki, Jun / Suzuki, Hiromichi

    Hypertension research : official journal of the Japanese Society of Hypertension

    2019  Volume 42, Issue 5, Page(s) 699–707

    Abstract: Hypertensive disorders of pregnancy (HDP) represent a frequent disorder among pregnancies. Women with severe hypertension in pregnancy are at increased risk of maternal complications and require antihypertensive drug therapy. This study aimed to ... ...

    Abstract Hypertensive disorders of pregnancy (HDP) represent a frequent disorder among pregnancies. Women with severe hypertension in pregnancy are at increased risk of maternal complications and require antihypertensive drug therapy. This study aimed to systematically review randomized control trials of antihypertensive drug(s) treating non-severe hypertension during pregnancy to estimate the effectiveness and safety of this intervention. On May 8, 2018, we searched PubMed, Cochrane Library, and Ichu-Shi with no restriction on publication year. We selected randomized control trials that involved women with HDP being treated with antihypertensive drug(s) as intervention. Fourteen trials (1804 women) were identified for meta-analysis. There were no significant differences in the risk of maternal death (373 women; risk ratio (RR) 0.70; 95% confidence interval (CI) 0.04 to 11.45), proteinuria (1214 women; RR 1.00; 95% CI 0.67 to 1.49), side effects (360 women; RR 2.69; 95% CI 0.32 to 22.64), cesarean section (1239 women; RR 0.97; 95% CI 0.82 to 1.15), neonatal and birth death (1548 women; RR 0.80; 95% CI 0.43 to 1.49), preterm birth (904 women; RR 0.86; 95% CI 0.53 to 1.39), or small for gestational age infants (1082 women; RR 1.04; 95% CI 0.66 to 1.63) with antihypertensive drug therapy versus placebo or no treatment. The current review suggests that antihypertensive drug therapy does not reduce or increase the risk of maternal or perinatal outcomes. Further studies are needed to build reliable estimates of the effectiveness and safety of antihypertensive drug therapy for women with HDP.
    MeSH term(s) Antihypertensive Agents/therapeutic use ; Female ; Humans ; Hypertension, Pregnancy-Induced/drug therapy ; Pregnancy ; Pregnancy Outcome ; Randomized Controlled Trials as Topic ; Treatment Outcome
    Chemical Substances Antihypertensive Agents
    Language English
    Publishing date 2019-01-09
    Publishing country England
    Document type Journal Article ; Meta-Analysis ; Systematic Review
    ZDB-ID 1175297-x
    ISSN 1348-4214 ; 0916-9636
    ISSN (online) 1348-4214
    ISSN 0916-9636
    DOI 10.1038/s41440-018-0188-0
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Oxidative stress and organ damages.

    Ogura, Sayoko / Shimosawa, Tatsuo

    Current hypertension reports

    2014  Volume 16, Issue 8, Page(s) 452

    Abstract: Oxidative stress plays a pivotal role in various pathological conditions, including hypertension, pulmonary hypertension, diabetes, and chronic kidney disease, with high levels of oxidative stress in target organs such as the heart, pancreas, kidney, and ...

    Abstract Oxidative stress plays a pivotal role in various pathological conditions, including hypertension, pulmonary hypertension, diabetes, and chronic kidney disease, with high levels of oxidative stress in target organs such as the heart, pancreas, kidney, and lung. Oxidative stress is known to activate multiple intracellular signaling, which induces apoptosis or cell overgrowth, leading to organ dysfunction. As such, targeting oxidative stress is thought to be effective in protecting against organ damage, and measuring oxidative stress status may serve as a biomarker in diverse disease states. Several new intrinsic anti-oxidative or pro-oxidative factors have recently been reported, and are potential new targets. In the present review, we focus on diabetes, pulmonary hypertension, and renal dysfunction, and their relation with new targets - adrenomedullin, oxidized LDL, and mineralocorticoid receptor.
    MeSH term(s) Animals ; Apoptosis/physiology ; Diabetes Mellitus/metabolism ; Humans ; Hypertension/metabolism ; Oxidative Stress/physiology ; Reactive Oxygen Species/metabolism ; Renal Insufficiency, Chronic/metabolism
    Chemical Substances Reactive Oxygen Species
    Language English
    Publishing date 2014-07-11
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2057367-4
    ISSN 1534-3111 ; 1522-6417
    ISSN (online) 1534-3111
    ISSN 1522-6417
    DOI 10.1007/s11906-014-0452-x
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Corrigendum to "Novel round cells in urine sediment and their clinical implications" [Clin. Chim. Acta 457 (2016) 142-149].

    Shukuya, Kenichi / Ogura, Sayoko / Tokuhara, Yasunori / Okubo, Shigeo / Yatomi, Yutaka / Tozuka, Minoru / Shimosawa, Tatsuo

    Clinica chimica acta; international journal of clinical chemistry

    2017  Volume 472, Page(s) 104

    Language English
    Publishing date 2017-09
    Publishing country Netherlands
    Document type Published Erratum
    ZDB-ID 80228-1
    ISSN 1873-3492 ; 0009-8981
    ISSN (online) 1873-3492
    ISSN 0009-8981
    DOI 10.1016/j.cca.2017.07.026
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Targeting LOX-1 in atherosclerosis and vasculopathy: current knowledge and future perspectives.

    Tian, Kunming / Ogura, Sayoko / Little, Peter J / Xu, Suo-Wen / Sawamura, Tatsuya

    Annals of the New York Academy of Sciences

    2018  Volume 1443, Issue 1, Page(s) 34–53

    Abstract: LOX-1 (lectin-like oxidized low-density lipoprotein receptor-1; also known as OLR1) is the dominant receptor that recognizes and internalizes oxidized low-density lipoproteins (ox-LDLs) in endothelial cells. Several genetic variants of LOX-1 are ... ...

    Abstract LOX-1 (lectin-like oxidized low-density lipoprotein receptor-1; also known as OLR1) is the dominant receptor that recognizes and internalizes oxidized low-density lipoproteins (ox-LDLs) in endothelial cells. Several genetic variants of LOX-1 are associated with the risk and severity of coronary artery disease. The LOX-1-ox-LDL interaction induces endothelial dysfunction, leukocyte adhesion, macrophage-derived foam cell formation, smooth muscle cell proliferation and migration, and platelet activation. LOX-1 activation eventually leads to the rupture of atherosclerotic plaques and acute cardiovascular events. In addition, LOX-1 can be cleaved to generate soluble LOX-1 (sLOX-1), which is a useful diagnostic and prognostic marker for atherosclerosis-related diseases in human patients. Of therapeutic relevance, several natural products and clinically used drugs have emerged as LOX-1 inhibitors that have antiatherosclerotic actions. We hereby provide an updated overview of role of LOX-1 in atherosclerosis and associated vascular diseases, with an aim to highlighting the potential of LOX-1 as a novel theranostic tool for cardiovascular disease prevention and treatment.
    MeSH term(s) Atherosclerosis/drug therapy ; Biomarkers/metabolism ; Coronary Artery Disease/drug therapy ; Humans ; Risk Factors ; Scavenger Receptors, Class E/drug effects ; Scavenger Receptors, Class E/genetics ; Scavenger Receptors, Class E/metabolism
    Chemical Substances Biomarkers ; Scavenger Receptors, Class E
    Language English
    Publishing date 2018-11-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 211003-9
    ISSN 1749-6632 ; 0077-8923
    ISSN (online) 1749-6632
    ISSN 0077-8923
    DOI 10.1111/nyas.13984
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Novel round cells in urine sediment and their clinical implications.

    Shukuya, Kenichi / Ogura, Sayoko / Tokuhara, Yasunori / Okubo, Shigeo / Yatomi, Yutaka / Tozuka, Minoru / Shimosawa, Tatsuo

    Clinica chimica acta; international journal of clinical chemistry

    2016  Volume 457, Page(s) 142–149

    Abstract: Background: Voided urine contains a variety of cells from the kidney and urinary tract and urinalysis provides us various information by investigating cellular components. We investigated urine sediment from renal impaired patients.: Results: We ... ...

    Abstract Background: Voided urine contains a variety of cells from the kidney and urinary tract and urinalysis provides us various information by investigating cellular components. We investigated urine sediment from renal impaired patients.
    Results: We found 'round cell' to be distinct from known cells in sediment and is close to proximal convoluted tubule-derived cells based on morphology and molecular marker expression (GGT1 but not podocalyxin). Also it was positive for undifferentiated cell markers, including PAX2, WT1, OSR1, and SIX2. They were observed in end-stage renal failure patients and the number of cells was correlated with the severity of chronic kidney disease. A prospective analysis revealed that patients who had more round cells were more likely to require hemodialysis within a year.
    Conclusion: Round cells are a novel marker that can be used to predict the need for hemodialysis.
    MeSH term(s) Adult ; Aged ; Aged, 80 and over ; Female ; Humans ; Male ; Middle Aged ; Urinalysis ; Urine/cytology
    Language English
    Publishing date 2016-06-01
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 80228-1
    ISSN 1873-3492 ; 0009-8981
    ISSN (online) 1873-3492
    ISSN 0009-8981
    DOI 10.1016/j.cca.2016.04.017
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Low-dose L-NAME induces salt sensitivity associated with sustained increased blood volume and sodium-chloride cotransporter activity in rodents.

    Wang, Conghui / Kawakami-Mori, Fumiko / Kang, Lei / Ayuzawa, Nobuhiro / Ogura, Sayoko / Koid, Suang Suang / Reheman, Latapati / Yeerbolati, Alimila / Liu, Beibei / Yatomi, Yutaka / Chen, Xiangmei / Fujita, Toshiro / Shimosawa, Tatsuo

    Kidney international

    2020  Volume 98, Issue 5, Page(s) 1242–1252

    Abstract: To investigate the cause of salt sensitivity in a normotensive animal model, we treated rats with a low-dose of the nitric oxide synthase inhibitor, L-NAME, that does not elevate blood pressure per se or induce kidney fibrosis. A high salt diet increased ...

    Abstract To investigate the cause of salt sensitivity in a normotensive animal model, we treated rats with a low-dose of the nitric oxide synthase inhibitor, L-NAME, that does not elevate blood pressure per se or induce kidney fibrosis. A high salt diet increased the circulating blood volume both in L-NAME-treated and nontreated animals for the first 24 hours. Thereafter, the blood volume increase persisted only in the L-NAME-treated rats. Blood pressure was higher in the L-NAME-treated group from the start of high salt diet exposure. Within the first 24 hours of salt loading, the L-NAME treated animals failed to show vasodilation and maintained high systemic vascular resistance in response to blood volume expansion. After four weeks on the high salt diet, the slope of the pressure-natriuresis curve was blunted in the L-NAME-treated group. An increase in natriuresis was observed after treatment with hydrochlorothiazide, but not amiloride, a change observed in parallel with increased phosphorylated sodium-chloride cotransporter (NCC). In contrast, a change in blood pressure was not observed in L-NAME-treated NCC-deficient mice fed a high salt diet. Moreover, direct L-NAME-induced NCC activation was demonstrated in cells of the mouse distal convoluted tubule. The vasodilatator, sodium nitroprusside, downregulated phosphorylated NCC expression. The effect of L-NAME on phosphorylated NCC was blocked by both the SPAK inhibitor STOCK2S-26016 and the superoxide dismutase mimetic TEMPO which also attenuated salt-induced hypertension. These results suggest that the initiation of salt sensitivity in normotensive rodents could be due to hyporeactivity of the vasculature and that maintaining blood pressure could result in a high circulating volume due to inappropriate NCC activity in the low-dose L-NAME model. Thus, even slightly impaired nitric oxide production may be important in salt sensitivity regulation in healthy rodents.
    MeSH term(s) Animals ; Blood Pressure ; Blood Volume ; Hypertension/chemically induced ; Mice ; NG-Nitroarginine Methyl Ester ; Rats ; Rodentia ; Sodium Chloride Symporters
    Chemical Substances Sodium Chloride Symporters ; NG-Nitroarginine Methyl Ester (V55S2QJN2X)
    Language English
    Publishing date 2020-06-24
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 120573-0
    ISSN 1523-1755 ; 0085-2538
    ISSN (online) 1523-1755
    ISSN 0085-2538
    DOI 10.1016/j.kint.2020.05.050
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  9. Article ; Online: Pulmonary arterial hypertension in rats due to age-related arginase activation in intermittent hypoxia.

    Nara, Akina / Nagai, Hisashi / Shintani-Ishida, Kaori / Ogura, Sayoko / Shimosawa, Tatsuo / Kuwahira, Ichiro / Shirai, Mikiyasu / Yoshida, Ken-ichi

    American journal of respiratory cell and molecular biology

    2015  Volume 53, Issue 2, Page(s) 184–192

    Abstract: Pulmonary arterial hypertension (PAH) is prevalent in patients with obstructive sleep apnea syndrome (OSAS). Aging induces arginase activation and reduces nitric oxide (NO) production in the arteries. Intermittent hypoxia (IH), conferred by cycles of ... ...

    Abstract Pulmonary arterial hypertension (PAH) is prevalent in patients with obstructive sleep apnea syndrome (OSAS). Aging induces arginase activation and reduces nitric oxide (NO) production in the arteries. Intermittent hypoxia (IH), conferred by cycles of brief hypoxia and normoxia, contributes to OSAS pathogenesis. Here, we studied the role of arginase and aging in the pathogenesis of PAH in adult (9-mo-old) and young (2-mo-old) male Sprague-Dawley rats subjected to IH or normoxia for 4 weeks and analyzed them with a pressure-volume catheter inserted into the right ventricle (RV) and by pulsed Doppler echocardiography. Western blot analysis was conducted on arginase, NO synthase isoforms, and nitrotyrosine. IH induced PAH, as shown by increased RV systolic pressure and RV hypertrophy, in adult rats but not in young rats. IH increased expression levels of arginase I and II proteins in the adult rats. IH also increased arginase I expression in the pulmonary artery endothelium and arginase II in the pulmonary artery adventitia. Furthermore, IH reduced pulmonary levels of nitrate and nitrite but increased nitrotyrosine levels in adult rats. An arginase inhibitor (N(ω)-hydroxy-nor-1-arginine) prevented IH-induced PAH and normalized nitrite and nitrate levels in adult rats. IH induced arginase up-regulation and PAH in adult rats, but not in young rats, through reduced NO production. Our findings suggest that arginase inhibition prevents or reverses PAH.
    MeSH term(s) Aging ; Animals ; Arginase/metabolism ; Cell Hypoxia ; Enzyme Activation ; Hypertension/enzymology ; Lung/enzymology ; Male ; Nitrates/metabolism ; Nitric Oxide Synthase Type I/metabolism ; Nitric Oxide Synthase Type III/metabolism ; Nitrites/metabolism ; Pulmonary Artery/enzymology ; Pulmonary Artery/physiopathology ; Rats, Sprague-Dawley ; Tyrosine/analogs & derivatives ; Tyrosine/metabolism
    Chemical Substances Nitrates ; Nitrites ; 3-nitrotyrosine (3604-79-3) ; Tyrosine (42HK56048U) ; Nitric Oxide Synthase Type I (EC 1.14.13.39) ; Nitric Oxide Synthase Type III (EC 1.14.13.39) ; Nos3 protein, rat (EC 1.14.13.39) ; Arginase (EC 3.5.3.1)
    Language English
    Publishing date 2015-08
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1025960-0
    ISSN 1535-4989 ; 1044-1549
    ISSN (online) 1535-4989
    ISSN 1044-1549
    DOI 10.1165/rcmb.2014-0163OC
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  10. Article ; Online: LOX-1 in atherosclerosis: biological functions and pharmacological modifiers.

    Xu, Suowen / Ogura, Sayoko / Chen, Jiawei / Little, Peter J / Moss, Joel / Liu, Peiqing

    Cellular and molecular life sciences : CMLS

    2012  Volume 70, Issue 16, Page(s) 2859–2872

    Abstract: Lectin-like oxidized LDL (oxLDL) receptor-1 (LOX-1, also known as OLR-1), is a class E scavenger receptor that mediates the uptake of oxLDL by vascular cells. LOX-1 is involved in endothelial dysfunction, monocyte adhesion, the proliferation, migration, ... ...

    Abstract Lectin-like oxidized LDL (oxLDL) receptor-1 (LOX-1, also known as OLR-1), is a class E scavenger receptor that mediates the uptake of oxLDL by vascular cells. LOX-1 is involved in endothelial dysfunction, monocyte adhesion, the proliferation, migration, and apoptosis of smooth muscle cells, foam cell formation, platelet activation, as well as plaque instability; all of these events are critical in the pathogenesis of atherosclerosis. These LOX-1-dependent biological processes contribute to plaque instability and the ultimate clinical sequelae of plaque rupture and life-threatening tissue ischemia. Administration of anti-LOX-1 antibodies inhibits atherosclerosis by decreasing these cellular events. Over the past decade, multiple drugs including naturally occurring antioxidants, statins, antiinflammatory agents, antihypertensive and antihyperglycemic drugs have been demonstrated to inhibit vascular LOX-1 expression and activity. Therefore, LOX-1 represents an attractive therapeutic target for the treatment of human atherosclerotic diseases. This review aims to integrate the current understanding of LOX-1 signaling, regulation of LOX-1 by vasculoprotective drugs, and the importance of LOX-1 in the pathogenesis of atherosclerosis.
    MeSH term(s) Animals ; Atherosclerosis/drug therapy ; Atherosclerosis/metabolism ; Humans ; Lipoproteins, LDL/metabolism ; Scavenger Receptors, Class E/antagonists & inhibitors ; Scavenger Receptors, Class E/metabolism
    Chemical Substances Lipoproteins, LDL ; Scavenger Receptors, Class E ; oxidized low density lipoprotein
    Language English
    Publishing date 2012-11-03
    Publishing country Switzerland
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-012-1194-z
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