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1.
Blood Purif ; : 1-12, 2023 Jan 26.
Artículo en Inglés | MEDLINE | ID: mdl-36702112

RESUMEN

We now face a paradigm shift in clinical practice and research of dialysis from evidence-based medicine outcomes to patient-reported outcomes (PROs). It is imperative to establish a daily practice pattern based on the PROs, namely "patient-centered dialysis care." In 2005, we introduced the concept of "patient-oriented dialysis," which includes two fundamental components; adjustment of the dialysis prescription according to the PROs and nutritional intervention based on the global nutritional assessment. Routine examinations and team meetings were held to monitor the status of PROs and nutrition, and intervention plans were reevaluated. We found that the total score of the PROs was closely related to the survival rate of dialysis patients, and some of those were identified as independent mortality risk factors. These results might have shown that patient-centered dialysis care may improve the quality of life and the survival rate of dialysis patients. Polymethyl methacrylate (PMMA) is a unique synthetic membrane for a dialyzer with protein adsorption property and biocompatibility. Several clinical advantages of PMMA were reported as ameliorating inflammatory status, nutritional status, skin itchiness, and dialysis-related fatigue. PMMA is a fundamental and major choice for improving PROs in patient-centered dialysis care.

2.
J Lipid Res ; 54(6): 1531-1540, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23515281

RESUMEN

Insulin plays important roles in apoptosis and lipid droplet (LD) formation, and it is one of the determinants involved in increasing fat mass. However, the mechanisms underlying insulin-induced enlargement of fat mass remain unclear. Our previous study suggested that insulin-induced increases in LDs are related to c-Jun N-terminal kinase (JNK)2-mediated upregulation of cell death-inducing DNA fragmentation factor-α-like effector (CIDE)C in human adipocytes. However, other genes involved in insulin/JNK2-induced LD formation are unknown. Here, we explored insulin/JNK2-regulated genes to clarify the mechanism of enlargement of LDs. Microarray analysis revealed that an insulin/JNK2 pathway mostly regulates expression of genes involved in lipid metabolism, including sterol regulatory element binding protein (SREBP)-1, a key transcription factor of lipogenesis. The JNK inhibitor SP600125 blocked insulin-induced upregulation of SREBP-1c expression. Small interfering RNA-mediated depletion of JNK2 suppressed insulin-induced nuclear accumulation of the active form of SREBP-1 protein and upregulation of SREBP-1c. Furthermore, depletion of JNK2 attenuated insulin-induced upregulation of SREBP-1c target lipogenic enzymes, leading to reduced de novo fatty acid synthesis. In addition, JNK2 coimmunoprecipitated with SREBP-1, reinforcing the correlation between JNK2 and SREBP-1. These results suggest that SREBP-1c is a novel insulin/JNK2-regulated gene and that the JNK2/SREBP-1c pathway mediates insulin-induced fatty acid synthesis, which may lead to enlargement of LDs in human adipocytes.


Asunto(s)
Adipocitos/metabolismo , Núcleo Celular/metabolismo , Ácidos Grasos/biosíntesis , Hipoglucemiantes/farmacología , Insulina/farmacología , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Proteína Quinasa 9 Activada por Mitógenos/metabolismo , Proteína 1 de Unión a los Elementos Reguladores de Esteroles/metabolismo , Transporte Activo de Núcleo Celular/efectos de los fármacos , Transporte Activo de Núcleo Celular/genética , Adipocitos/citología , Adulto , Antracenos/farmacología , Células Cultivadas , Ácidos Grasos/genética , Femenino , Humanos , Sistema de Señalización de MAP Quinasas/genética , Masculino , Persona de Mediana Edad , Proteína Quinasa 9 Activada por Mitógenos/antagonistas & inhibidores , Proteína Quinasa 9 Activada por Mitógenos/genética , Proteína 1 de Unión a los Elementos Reguladores de Esteroles/genética
3.
J Hum Genet ; 58(5): 254-8, 2013 May.
Artículo en Inglés | MEDLINE | ID: mdl-23407349

RESUMEN

Lipoprotein glomerulopathy (LPG) is a hereditary disease characterized by lipoprotein thrombi in the glomerulus, hyperlipoproteinemia, and a marked increase in serum apolipoprotein E (APOE). More than 12 APOE mutations have been identified as causes of LPG, and APOE-Sendai (Arg145Pro) mutation was frequently detected in patients from the eastern part of Japan including Yamagata prefecture. Recently, effective therapy with intensive lipid-lowering agents was established, and epidemiologic data are required for early diagnosis. We determined the haplotype structure of APOE-Sendai in 13 patients from 9 unrelated families with LPG, and found that the haplotype of all APOE-Sendai mutations was identical, suggesting that APOE-Sendai mutation is common in Japanese patients probably through a founder effect. We also studied the gene frequency of APOE-Sendai in 2023 control subjects and 418 patients receiving hemodialysis in Yamagata prefecture using the TaqMan method, but did not identify any subjects carrying the mutation, indicating that it is very rare in the general population even in the eastern part of Japan. In addition to APOE mutation, other genetic and/or epigenetic factors are considered to be involved in the pathogenesis of LPG because of its low penetrance. The patients did not have a common haplotype of the counterpart APOE allele, and some patients had the same haplotype of the counterpart APOE allele as the asymptomatic carriers. These results suggest that the counterpart APOE allele is not likely associated with the onset of LPG. Further study is required to clarify the pathogenesis of LPG.


Asunto(s)
Apolipoproteínas E/genética , Efecto Fundador , Predisposición Genética a la Enfermedad , Haplotipos , Enfermedades Renales/genética , Mutación , Adolescente , Adulto , Anciano , Niño , Análisis Mutacional de ADN , Femenino , Orden Génico , Humanos , Japón , Enfermedades Renales/terapia , Masculino , Persona de Mediana Edad , Linaje , Polimorfismo de Nucleótido Simple , Diálisis Renal , Adulto Joven
4.
iScience ; 26(4): 106293, 2023 Apr 21.
Artículo en Inglés | MEDLINE | ID: mdl-36950117

RESUMEN

5'-Adenosine monophosphate-activated protein kinase (AMPK) is a potential therapeutic target for various medical conditions. We here identify a small-molecule compound (RX-375) that activates AMPK and inhibits fatty acid synthesis in cultured human hepatocytes. RX-375 does not bind to AMPK but interacts with prohibitins (PHB1 and PHB2), which were found to form a complex with AMPK. RX-375 induced dissociation of this complex, and PHBs knockdown resulted in AMPK activation, in the cultured cells. Administration of RX-375 to obese mice activated AMPK and ameliorated steatosis in the liver. High-throughput screening based on disruption of the AMPK-PHB interaction identified a second small-molecule compound that activates AMPK, confirming the importance of this interaction in the regulation of AMPK. Our results thus indicate that PHBs are previously unrecognized negative regulators of AMPK, and that compounds that prevent the AMPK-PHB interaction constitute a class of AMPK activator.

5.
Ther Apher Dial ; 26(2): 417-424, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-34190410

RESUMEN

The study aimed to verify the impact of our clinical strategy, which emphasizes patient-centered care, based on patient-reported outcome measures (PROMs) results in hemodialysis patients. We developed our original PROM (comprising 20 items) to assess patients' symptom burden. To confirm the validity of our clinical pattern, we performed various analyses using PROM data. We retrospectively enrolled 383 individuals (mean age 66.3 years; 252 men), collected their PROM data in December 2013, and followed them up for 3 years. We noted a lower mortality rate and a lower prevalence of itching in our facilities than in previous surveys and reports in Japan. Furthermore, we observed that the severity of symptom burden affected medium-term prognosis. This is the first study to report the results of patient-centered medical practice utilizing PROMs in dialysis care. Careful attention should be paid to patients' symptom burden, as performed in objective data management.


Asunto(s)
Medición de Resultados Informados por el Paciente , Calidad de Vida , Anciano , Humanos , Masculino , Atención Dirigida al Paciente , Diálisis Renal , Estudios Retrospectivos
6.
J Lipid Res ; 52(8): 1450-60, 2011 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-21636835

RESUMEN

Both insulin and the cell death-inducing DNA fragmentation factor-α-like effector (CIDE) family play important roles in apoptosis and lipid droplet formation. Previously, we reported that CIDEA and CIDEC are differentially regulated by insulin and contribute separately to insulin-induced anti-apoptosis and lipid droplet formation in human adipocytes. However, the upstream signals of CIDE proteins remain unclear. Here, we investigated the signaling molecules involved in insulin regulation of CIDEA and CIDEC expression. The phosphatidylinositol 3-kinase (PI3K) inhibitors wortmannin and PI-103 blocked both insulin-induced downregulation of CIDEA and upregulation of CIDEC. The Akt inhibitor API-2 and the c-Jun N-terminal kinase (JNK) inhibitor SP600125 selectively inhibited insulin regulation of CIDEA and CIDEC expression, respectively, whereas the MAPK/ERK kinase inhibitor U0126 and the p38 inhibitor SB203580 did not. Small interfering RNA-mediated depletion of Akt1/2 prevented insulin-induced downregulation of CIDEA and inhibition of apoptosis. Depletion of JNK2, but not JNK1, inhibited insulin-induced upregulation of CIDEC and lipid droplet enlargement. Furthermore, insulin increased both Akt and JNK phosphorylation, which was abrogated by the PI3K inhibitors. These results suggest that insulin regulates CIDEA and CIDEC expression via PI3K, and it regulates expression of each protein via Akt1/2- and JNK2-dependent pathways, respectively, in human adipocytes.


Asunto(s)
Adipocitos/metabolismo , Proteínas Reguladoras de la Apoptosis/metabolismo , Regulación de la Expresión Génica , Insulina , Obesidad/metabolismo , Proteínas/metabolismo , Transducción de Señal , Adipocitos/citología , Apoptosis/efectos de los fármacos , Proteínas Reguladoras de la Apoptosis/genética , Clorpropamida/análogos & derivados , Clorpropamida/farmacología , Fragmentación del ADN/efectos de los fármacos , Regulación hacia Abajo , Femenino , Furanos/farmacología , Silenciador del Gen/efectos de los fármacos , Humanos , Insulina/metabolismo , Insulina/farmacología , Proteína Quinasa 9 Activada por Mitógenos/antagonistas & inhibidores , Proteína Quinasa 9 Activada por Mitógenos/genética , Proteína Quinasa 9 Activada por Mitógenos/metabolismo , Obesidad/genética , Obesidad/patología , Obesidad/fisiopatología , Fosfatidilinositol 3-Quinasas/genética , Fosfatidilinositol 3-Quinasas/metabolismo , Inhibidores de las Quinasa Fosfoinosítidos-3 , Fosforilación/efectos de los fármacos , Inhibidores de Proteínas Quinasas/farmacología , Proteínas/genética , Proteínas Proto-Oncogénicas c-akt/antagonistas & inhibidores , Proteínas Proto-Oncogénicas c-akt/genética , Proteínas Proto-Oncogénicas c-akt/metabolismo , Piridinas/farmacología , Pirimidinas/farmacología , ARN Interferente Pequeño/farmacología , Regulación hacia Arriba
7.
J Lipid Res ; 52(2): 299-307, 2011 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-21078775

RESUMEN

Palmitic acid (PA) upregulates oxidized LDL receptor-1 (LOX-1), a scavenger receptor responsible for uptake of oxidized LDL (oxLDL), and enhances oxLDL uptake in macrophages. However, the precise underlying mechanism remains to be elucidated. PA is known to induce endoplasmic reticulum (ER) stress in various cell types. Therefore, we investigated whether ER stress is involved in PA-induced LOX-1 upregulation. PA induced ER stress, as determined by phosphorylation of PERK, eIF2α, and JNK, as well as induction of CHOP in macrophage-like THP-1 cells. Inhibitors [4-phenylbutyric acid (PBA), sodium tauroursodeoxycholate (TUDCA), and salubrinal] and small interfering RNA (siRNA) for the ER stress response decreased PA-induced LOX-1 upregulation. Thapsigargin, an ER stress inducer, upregulated LOX-1, which was decreased by PBA and TUDCA. We next examined whether unsaturated FAs could counteract the effect of PA. Both oleic acid (OA) and linoleic acid (LA) suppressed PA-induced LOX-1. Activation of the ER stress response observed in the PA-treated cells was markedly attenuated when the cells were cotreated with OA or LA. In addition, OA and LA suppressed thapsigargin-induced LOX-1 upregulation with reduced activation of ER stress markers. Our results indicate that activation of ER stress is involved in PA-induced LOX-1 upregulation in macrophages, and that OA and LA inhibit LOX-1 induction through suppression of ER stress.


Asunto(s)
Retículo Endoplásmico/efectos de los fármacos , Ácidos Grasos Insaturados/farmacología , Ácido Palmítico/farmacología , Receptores de LDL Oxidadas/metabolismo , Animales , Línea Celular , Humanos , Fenilbutiratos/farmacología , ARN Interferente Pequeño/farmacología , Estrés Fisiológico/efectos de los fármacos , Tapsigargina/farmacología , Regulación hacia Arriba
8.
J Lipid Res ; 51(7): 1676-84, 2010 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-20154362

RESUMEN

Both insulin and the cell death-inducing DNA fragmentation factor-alpha-like effector (CIDE) family play important roles in apoptosis and lipid droplet formation. However, regulation of the CIDE family by insulin and the contribution of the CIDE family to insulin actions remain unclear. Here, we investigated whether insulin regulates expression of the CIDE family and which subtypes contribute to insulin-induced anti-apoptosis and lipid droplet formation in human adipocytes. Insulin decreased CIDEA and increased CIDEC but not CIDEB mRNA expression. Starvation-induced apoptosis in adipocytes was significantly inhibited when insulin decreased the CIDEA mRNA level. Small interfering RNA-mediated depletion of CIDEA inhibited starvation-induced apoptosis similarly to insulin and restored insulin deprivation-reduced adipocyte number, whereas CIDEC depletion did not. Lipid droplet size of adipocytes was increased when insulin increased the CIDEC mRNA level. In contrast, insulin-induced enlargement of lipid droplets was markedly abrogated by depletion of CIDEC but not CIDEA. Furthermore, depletion of CIDEC, but not CIDEA, significantly increased glycerol release from adipocytes. These results suggest that CIDEA and CIDEC are novel genes regulated by insulin in human adipocytes and may play key roles in the effects of insulin, such as anti-apoptosis and lipid droplet formation.


Asunto(s)
Adipocitos/efectos de los fármacos , Adipocitos/metabolismo , Proteínas Reguladoras de la Apoptosis/metabolismo , Apoptosis/efectos de los fármacos , Cuerpos de Inclusión/metabolismo , Insulina/farmacología , Proteínas/metabolismo , Adipocitos/citología , Proteínas Reguladoras de la Apoptosis/genética , Células Cultivadas , Humanos , Cuerpos de Inclusión/química , Proteínas/genética , ARN Interferente Pequeño/genética , ARN Interferente Pequeño/metabolismo
9.
Cell Signal ; 20(7): 1256-66, 2008 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-18407462

RESUMEN

Wnts are secreted glycoproteins that control diverse biological processes, such as proliferation, differentiation, and apoptosis. We here found that Wnt5a inhibited apoptosis induced by serum deprivation in primary-cultured human dermal fibroblasts. Anti-apoptotic activity of Wnt5a was not inhibited by a dickkopf-1 (DKK), which blocks the canonical Wnt pathway. On the other hand, loss of function of protein kinase A (PKA), induced by treatment with PKA inhibitors, siRNA-mediated knocking down of endogenous PKA catalytic subunits, or enforced expression of dominant-negative PKA inhibited the Wnt5a anti-apoptotic activity, indicating the involvement of PKA in the Wnt5a anti-apoptotic activity. In agreement, phosphorylation levels of a cAMP response element binding protein (CREB), a representative downstream effector of PKA, the activation of which is known to lead to the pro-survival effects, was elevated by Wnt5a. In addition, Wnt5a increased the nuclear beta-catenin level and treatment with imatinib or ionomycin, either of which blocks the beta-catenin pathway, reduced the anti-apoptotic activity of Wnt5a, together suggesting the simultaneous involvement of the beta-catenin-mediated pathway in the Wnt5a anti-apoptotic activity. Based on another finding indicating that Wnt5a upregulated PKA-mediated phosphorylation of glycogen synthase kinase-3beta (GSK-3beta) at serine 9 that caused inactivation of GSK-3beta and subsequently resulted in activation of the beta-catenin pathway, we have speculated that the Wnt5a anti-apoptotic activity may be partially mediated by PKA-mediated phosphorylation of GSK-3beta and subsequent activation of the beta-catenin pathway.


Asunto(s)
Apoptosis/efectos de los fármacos , Proteínas Quinasas Dependientes de AMP Cíclico/metabolismo , Dermis/citología , Fibroblastos/citología , Fibroblastos/enzimología , Transducción de Señal/efectos de los fármacos , Proteínas Wnt/farmacología , Dermis/enzimología , Activación Enzimática/efectos de los fármacos , Fibroblastos/efectos de los fármacos , Glucógeno Sintasa Quinasa 3/metabolismo , Glucógeno Sintasa Quinasa 3 beta , Humanos , Proteínas Relacionadas con Receptor de LDL/metabolismo , Proteína-5 Relacionada con Receptor de Lipoproteína de Baja Densidad , Proteína-6 Relacionada a Receptor de Lipoproteína de Baja Densidad , Modelos Biológicos , Fosforilación/efectos de los fármacos , Fosfoserina/metabolismo , Receptores de LDL/metabolismo , beta Catenina/metabolismo
10.
J Pestic Sci ; 44(4): 282-289, 2019 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-31777448

RESUMEN

Fenoxasulfone is a novel rice herbicide that was discovered and developed by Kumiai Chemical Industry Co., Ltd. It displays excellent herbicidal activity against Echinochloa spp. and other annual weeds at 150-200 g a.i./ha with long residual activity and has a favorable toxicological, ecotoxicological, and environmental profile. Fenoxasulfone's mode of action was investigated, and it has been shown to inhibit the biosynthesis of very-long-chain fatty acids in plants. Fenoxasulfone was registered in Japan in 2014, and various products containing fenoxasulfone have been launched. With its high efficacy and long residual activity, we believe that fenoxasulfone will contribute to efficient food production in the future.

11.
Cell Signal ; 19(12): 2498-506, 2007 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-17804197

RESUMEN

Frizzled-3 (Fzd3), highly expressed in both the central nervous system (CNS) and skin, plays essential roles in axonal growth and guidance during the CNS development and may be involved in maintenance of skin integrity, although its ligand remains undetermined. In this study, we demonstrate that Wnt5a specifically binds to Fzd3 in vitro and triggers phosphorylation of Akt mediated by phosphatidylinositol-3 kinase (PI3K), but not that of ERK or protein kinase C, in human primary-cultured dermal fibroblasts. We have further found that such Wnt5a/Fzd3-triggered activation of the PI3K/Akt signal promotes integrin-mediated adhesion of human dermal fibroblasts to collagen I-coated dishes. Based on another finding that Wnt5a/Fzd3-triggered activation of the PI3K/Akt signal was blocked by an excess amount of a recombinant Fzd3-cysteine-rich domain (CRD), but not by that of a recombinant Fzd6-CRD, it is concluded that Wnt5a is a natural ligand of Fzd3 that triggers the PI3K/Akt signal and promotes adhesion of human dermal fibroblasts.


Asunto(s)
Adhesión Celular , Dermis/metabolismo , Fibroblastos/metabolismo , Receptores Frizzled/metabolismo , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , Receptores Acoplados a Proteínas G/metabolismo , Transducción de Señal , Proteínas Wnt/metabolismo , Androstadienos/farmacología , Animales , Células CHO , Adhesión Celular/efectos de los fármacos , Células Cultivadas , Cromonas/farmacología , Colágeno Tipo I/metabolismo , Cricetinae , Cricetulus , Cisteína/química , Dermis/citología , Dermis/efectos de los fármacos , Dermis/enzimología , Fibroblastos/efectos de los fármacos , Fibroblastos/enzimología , Receptores Frizzled/química , Receptores Frizzled/genética , Humanos , Integrinas/metabolismo , Ligandos , Ratones , Morfolinas/farmacología , Inhibidores de las Quinasa Fosfoinosítidos-3 , Fosforilación , Unión Proteica , Inhibidores de Proteínas Quinasas/farmacología , Estructura Terciaria de Proteína , Receptores Acoplados a Proteínas G/química , Receptores Acoplados a Proteínas G/genética , Proteínas Recombinantes/metabolismo , Transducción de Señal/efectos de los fármacos , Factores de Tiempo , Transfección , Proteínas Wnt/genética , Wortmanina
12.
J Oleo Sci ; 67(4): 471-477, 2018 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-29526880

RESUMEN

Emu is the second-largest extant bird native to Australia. Emu oil, obtained from the emu's fat deposits, is used as an ingredient in cosmetic skincare products. Emu oil has been reported to improve several inflammatory symptoms; however, the mechanisms of these anti-inflammatory effects are largely unknown. This study investigated the effects of emu oil on the inflammatory macrophage response in vitro. A murine macrophage cell line, RAW 264, was incubated in culture media supplemented with or without emu oil and stimulated with lipopolysaccharide (LPS). We determined phagocytic activity by measuring the number of fluorescent microspheres taken up by the cells. The phagocytic activity of RAW 264 cells in the presence of LPS was unaffected by emu oil. We also determined production of nitric oxide (NO) and tumor necrosis factor (TNF)-α in the culture medium using the Griess reaction and an enzyme-linked immunosorbent assay, respectively, and the protein expression of inducible NO synthase (iNOS) using western blotting. The results indicated that emu oil reduced the LPS-induced production of NO, TNF-α, and iNOS expression in a dose-dependent manner. The results suggested that emu oil does not reduce the phagocytic clearance rate of inflammatory matter; however, it does reduce the production of NO and TNF-α in macrophages. These latter products enhance the inflammatory response and emu oil thereby demonstrated anti-inflammatory properties.


Asunto(s)
Antiinflamatorios , Lipopolisacáridos/efectos adversos , Lipopolisacáridos/antagonistas & inhibidores , Óxido Nítrico/metabolismo , Aceites/farmacología , Factor de Necrosis Tumoral alfa/metabolismo , Animales , Relación Dosis-Respuesta a Droga , Dromaiidae , Ensayo de Inmunoadsorción Enzimática/métodos , Ratones , Fagocitosis/efectos de los fármacos , Células RAW 264.7
13.
J Biosci Bioeng ; 126(5): 624-629, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-29861316

RESUMEN

In traditional kimoto-type sake production, cells of Saccharomyces cerevisiae sake yeast are grown in a starter mash generated by lactate fermentation by lactic acid bacteria (LAB) such as Leuconostoc mesenteroides and Lactobacillus sakei. However, the microbial interactions between sake yeast and kimoto LAB have not been well analyzed. Since the formation of a prion-like element (designated [GAR+]) in yeast cells is promoted by bacteria, we here examined the associated phenotype (i.e., increased glucosamine resistance) in sake yeast strains K701 (a representative sake strain) and Km67 (a strain isolated from kimoto-type sake mash). Approximately 0.5% of K701 and Km67 cells, as well as 0.2% of laboratory strain X2180 cells, exhibited increased glucosamine resistance under pure culture conditions, and the frequency of this metabolic switching was further enhanced by coculture with kimoto LAB. The LAB-promoted emergence of the glucosamine-resistant cells was the most prominent in Km67, suggesting that this strain possesses an advanced mechanism for response to LAB. While the glucosamine-resistant clones of X2180 and K701 exhibited lower rates of alcoholic fermentation under high-glucose conditions than did the respective naive strains, glucosamine resistance did not severely affect alcoholic fermentation in Km67. The population of dead cells after alcoholic fermentation was decreased in the glucosamine-resistant clones of X2180, K701, and Km67. These results suggested that the formation of [GAR+] in Km67 may be beneficial in kimoto-type sake making, since [GAR+] may increase cell viability in the sake starter mash without impairing alcoholic fermentation performance.


Asunto(s)
Bebidas Alcohólicas/microbiología , Fermentación/fisiología , Ácido Láctico/metabolismo , Lactobacillales/metabolismo , Saccharomyces cerevisiae/metabolismo , Bebidas Alcohólicas/análisis , Bacterias/metabolismo , Redes y Vías Metabólicas/genética , Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/genética , Proteínas de Saccharomyces cerevisiae/metabolismo
14.
RSC Adv ; 8(6): 2892-2899, 2018 Jan 12.
Artículo en Inglés | MEDLINE | ID: mdl-35541158

RESUMEN

Nonprecious metal electrocatalysts are being explored as alternatives to platinum-group metal electrocatalysts for the oxygen reduction reaction (ORR) which is required for cathode materials in fuel cells. Herein, we describe a new method for preparing bimetallic nitrogen-containing carbon catalysts with high ORR activity using π-expanded M(salen) precursors. The M/N/C and bimetallic FeM/N/C ORR catalysts were obtained by pyrolysis of a mixture of a carbon support (Vulcan XC-72R) and the metal complex as a precursor. The bimetallic FeCu catalyst prepared from Fe and Cu complexes with the N,N'-bis(2-hydroxy-1-naphthylidene)-1,2-phenylenediamine ligand (2NAPD) is found to have an onset potential of 0.87 V, which is positively shifted by 50 mV from that of the catalyst prepared from the monometallic Fe(2NAPD) complex. The FeCu/N/C catalyst promotes efficient four-electron reduction in the ORR. High-resolution transmission electron microscopy studies reveal that both Fe and Cu metals together with pyridinic nitrogen species are highly dispersed within the carbonaceous structure in FeCu/2NAPD@VC, suggesting that the N-coordinated Fe and Cu sites promote efficient four-electron reduction of O2. This new methodology facilitates design of nonprecious bimetallic carbon catalysts with excellent ORR activity.

15.
J Biosci Bioeng ; 124(5): 559-563, 2017 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-28797634

RESUMEN

A unique compost called Satsuma soil is produced from sewage sludge by a hyperthermal composting process in Kagoshima City, Japan. The composting process is carried out at a controlled temperature of at least 80°C and the resulting compost might be useful for recycling sustainable agricultural products. The extremely thermophilic bacterial genus Calditerricola was initially isolated from the high-temperature compost. Likewise, the bacteria were previously isolated from material sludge. It is believed that bacteria in this genus might be involved in the hyperthermal composting process. Calditerricola bacteria are distributed not only in compost, but also in all of its material sludge, and are more abundant in material sludge than in compost. Moreover, based on investigations of samples near geothermal areas in high temperature conditions, such as volcanoes, Calditerricola was presumed to originate in the volcanic ash of Mt. Sakurajima in Kagoshima City, Japan. However, its precise origin and ecology are unclear. Thus, in this study, a new molecular biological method called enrichment most probable number (MPN)-PCR (eMPN-PCR) was established and used to quantitatively investigate the population and distribution of the extreme thermophile Calditerricola in environmental samples using genus-specific PCR primers. The eMPN-PCR method was an effective quantitative detection method with high sensitivity, yielding MPN estimates that were highly correlated with colony forming unit (CFU) estimates but a low detection threshold value.


Asunto(s)
Bacillaceae/aislamiento & purificación , Calor , Reacción en Cadena de la Polimerasa/métodos , Agricultura , Bacillaceae/citología , Bacillaceae/genética , Compostaje , Japón , Aguas del Alcantarillado/microbiología , Microbiología del Suelo
16.
Data Brief ; 15: 720-723, 2017 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-29124097

RESUMEN

This data article provides the results of skin sensitization testing for emu and macadamia nut oil on 20 participants (ages 22-59 years old), including 3 men and 17 women. The test was carried out by performing a standard patch test using a Finn Chamber on Scanpor tape. The oils were applied to the participant's back using the tape and left in place for 24 h. After 1- and 24-h from removal of the tape, the reaction of the participant's skin was judged based on a scoring method recommended by Japanese Patch Test Research Group. Results are shown in table format.

17.
Data Brief ; 9: 1056-1059, 2016 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-27924292

RESUMEN

Here, we present data on the effects of emu oil, obtained from emu (Dromaius novaehollandiae) fat deposits, on melanogenesis in B16F1 murine melanoma cells. The cells were cultured in media containing different concentrations of emu oil, and the melanin content of these cells was measured using a microplate reader. Next, melanin content was measured for cells cultured with α-melanocyte-stimulating hormone. This article reports the different melanin contents as µg melanin/mg cellular protein, by using bar graphs with error bars. The present data imply that emu oil reduces the cellular melanin production.

18.
J Pestic Sci ; 41(4): 133-144, 2016 Nov 20.
Artículo en Inglés | MEDLINE | ID: mdl-30363103

RESUMEN

Thiocarbamate sulfoxides, which are the active forms of thiocarbamate herbicides, are quickly conjugated with glutathione and decomposed in soil. To achieve more potent and stable herbicidal activity, we previously developed a 5-{[(2,6-difluorophenyl)methoxy]methyl}-5-methyl derivative, which has a 4,5-dihydro-1,2-oxazole ring in place of the thiocarbamate to prevent conjugation and decomposition. Although the derivative showed pre-emergence herbicidal activity under flooded conditions, it displayed no herbicidal activity under upland conditions. In contrast, a 5-(methoxymethyl)-5-methyl derivative showed pre-emergence herbicidal activity against grass weeds under upland conditions. The aim of this study was to obtain a more potent compound with improved physicochemical properties for use as a pre-emergence upland herbicide via the structural optimization of a 3-{[(hetero)aryl]methanesulfonyl}-4,5-dihydro-1,2-oxazole as the core structure. In this way, we have developed the pre-emergence herbicide 3-{[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)-1H-pyrazol-4-yl]methanesulfonyl}-5,5-dimethyl-4,5-dihydro-1,2-oxazole, which has been named "pyroxasulfone." This novel compound displayed excellent herbicidal activity against grass and broadleaf weeds under upland conditions with no phytotoxicity against crops.

19.
Data Brief ; 9: 413-416, 2016 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-27699192

RESUMEN

Serotype C and D of Clostridium botulinum produce botulinum toxin complex (TC), which is comprised of botulinum neurotoxin, nontoxic nonhemagglutinin, and hemagglutinins (HAs). The TC is capable of aggregating equine erythrocytes via interaction between one of the HAs, namely HA-33, and sugar chains on the cell surface. This hemagglutination is inhibited by specific sugars. In this data article, we used four TCs from serotype C and D strains. The hemagglutination-inhibiting effects of 18 sugars and 8 glycoproteins were studied. The purified TC was mixed with the sugar to enable binding of the sugar to the TC; then, the erythrocytes were added to the mixture. Specific binding between the sugar and TC resulted in inhibition of cell aggregation. Here, data illustrating the inhibitory effects of various sugars and glycoproteins against hemagglutination induced by TC of C. botulinum serotypes C and D are presented.

20.
Jpn J Antibiot ; 58(1): 17-44, 2005 Feb.
Artículo en Japonés | MEDLINE | ID: mdl-15849869

RESUMEN

The susceptibilities of bacteria to fluoroquinolones (FQs), especially levofloxacin, and other antimicrobial agents were investigated using 11,475 clinical isolates collected in Japan during 2002. Methicillin susceptible staphylococci, Streptococcus pyogenes, Streptococcus pneumoniae, Moraxella catarrhalis, the family of Enterobactericeae, Haemophilus influenzae and Acinetobacter spp. exhibited stable and high susceptibilities to FQs. The rate of FQs-resistant MRSA was 80 approximately 90%, being markedly higher than that of FQs-resistant MSSA. The FQs-resistance rate of MRCNS was also higher than that of MSCNS, however, it was lower than that of MRSA. No FQs-resistant clinical isolates of Salmonella spp. were detected in any of the surveys. Thirteen of Escherichai coli 696 isolates, 8 of Klebsiella pneumoniae 630 isolates and 33 of Proteus mirabilis 373 isolates produced extended-spectrum beta-lactamase (ESBL), furthermore 6 of 13 in E. coli, 1 of 8 in K. pneumoniae and 14 of 31 ESBL-producing isolates, and in P. mirabilis were FQs resistant. Attention should be focused in the future on the emergence of ESBL in relation to FQs resistance. The rate of FQs-resistant P. aeruginosa isolated from urinary tract infection (UTI) was 40 approximately 60%, while 15 approximately 25% of isolates from respiratory tract infection (RTI) were resistant. IMP-1 type metallo beta-lactamase producing organisms were found in 49 of P. aeruginosa 1,095 isolates, 7 of S. marcescens 586 isolates and 4 of Acinetobacter spp. 474 isolates, respectively. Glycopeptide-resistant enterococci or S. aureus was not found.


Asunto(s)
Antibacterianos/farmacología , Farmacorresistencia Bacteriana , Bacterias Gramnegativas/efectos de los fármacos , Bacterias Grampositivas/efectos de los fármacos , Levofloxacino , Ofloxacino/farmacología , Escherichia coli/efectos de los fármacos , Humanos , Resistencia a la Meticilina , Pruebas de Sensibilidad Microbiana , Staphylococcus aureus/efectos de los fármacos
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