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https://www.readbyqxmd.com/read/29156799/asiatic-acid-protects-against-hepatic-ischemia-reperfusion-injury-by-inactivation-of-kupffer-cells-via-ppar%C3%AE-nlrp3-inflammasome-signaling-pathway
#1
Ying Xu, Jun Yao, Chen Zou, Heng Zhang, Shouliang Zhang, Jun Liu, Gui Ma, Pengcheng Jiang, Wenbo Zhang
Hepatic ischemia/reperfusion (I/R) contributes to major complications in clinical practice affecting perioperative morbidity and mortality. Recent evidence suggests the key role of nucleotide-binding oligomerization domain-like receptor (NLR) family pyrin domain-containing 3 (NLRP3) inflammaosme activation on the pathogenesis of I/R injury. Asiatic acid (AA) is a pentacyclic triterpene derivative presented with versatile activities, including antioxidant, anti-inflammation and hepatoprotective effects. This study was designed to determine whether AA had potential hepatoprotective benefits against hepatic I/R injury, as well as to unveil the underlying mechanisms involved in the putative effects...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156790/kaempferol-induces-autophagic-cell-death-of-hepatocellular-carcinoma-cells-via-activating-ampk-signaling
#2
Bing Han, Yi-Qun Yu, Qi-Lian Yang, Chun-Ying Shen, Xiao-Juan Wang
In the present study, we demonstrate that Kaempferol inhibited survival and proliferation of established human hepatocellular carcinoma (HCC) cell lines (HepG2, Huh-7, BEL7402, and SMMC) and primary human HCC cells. Kaempferol treatment in HCC cells induced profound AMP-activated protein kinase (AMPK) activation, which led to Ulk1 phosphorylation, mTOR complex 1 inhibition and cell autophagy. Autophagy induction was reflected by Beclin-1/autophagy gene 5 upregulation and p62 degradation as well as light chain 3B (LC3B)-I to LC3B-II conversion and LC3B puncta formation...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156730/generation-of-patient-specific-human-neural-stem-cells-from-niemann-pick-disease-type-c-patient-derived-fibroblasts
#3
Eun-Ah Sung, Kyung-Rok Yu, Ji-Hee Shin, Yoojin Seo, Hyung-Sik Kim, Myung Guen Koog, Insung Kang, Jae-Jun Kim, Byung-Chul Lee, Tae-Hoon Shin, Jin Young Lee, Seunghee Lee, Tae-Wook Kang, Soon Won Choi, Kyung-Sun Kang
Niemann-Pick disease type C (NPC) is a neurodegenerative and lysosomal lipid storage disorder, characterized by the abnormal accumulation of unesterified cholesterol and glycolipids, which is caused by mutations in the NPC1 genes. Here, we report the generation of human induced neural stem cells from NPC patient-derived fibroblasts (NPC-iNSCs) using only two reprogramming factors SOX2 and HMGA2 without going through the pluripotent state. NPC-iNSCs were stably expandable and differentiated into neurons, astrocytes, and oligodendrocytes...
October 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/29156563/wnt-inhibitory-activity-of-malus-pumila-miller-cv-annurca-and-malus-domestica-cv-limoncella-apple-extracts-on-human-colon-rectal-cells-carrying-familial-adenomatous-polyposis-mutations
#4
Gennaro Riccio, Maria Maisto, Sara Bottone, Nadia Badolati, Giovanni Battista Rossi, Gian Carlo Tenore, Mariano Stornaiuolo, Ettore Novellino
Inhibitors of the Wingless-related Integration site (WNT)/β-catenin pathway have recently been under consideration as potential chemopreventive agents against Familial Adenomatous Polyposis (FAP). This autosomal-dominant syndrome is caused by germline mutations in the gene coding for the protein APC and leads to hyperactivation of the WNT/β-catenin signaling pathway, uncontrolled intestinal cell proliferation and formation of adenocarcinomas. The aim of the present work was to: (i) test, on in vitro cultures of cells carrying FAP mutations and on ex vivo biopsies of FAP patients, the WNT inhibitory activity of extracts from two common southern Italian apples, Malus pumila Miller cv...
November 18, 2017: Nutrients
https://www.readbyqxmd.com/read/29156420/a-concise-synthesis-of-rhamnan-oligosaccharides-with-alternating-%C3%AE-1%C3%A2-2-1%C3%A2-3-linkages-and-repeating-%C3%AE-1%C3%A2-3-linkages-by-iterative-%C3%AE-glycosylation-using-disaccharide-building-blocks
#5
Hidenori Tanaka, Yu Hamaya, Nagatoshi Nishiwaki, Hideharu Ishida
A concise synthetic route to rhamnan oligosaccharides with alternating α-(1→2)/(1→3)-linkages and repeating α-(1→3)-linkages is reported. This synthesis was achieved by iterative α-glycosylation using disaccharide building blocks and through orthogonal coupling between thioglycosides of L-rhamnose. To investigate the detailed structure-activity relationship of rhamnan sulfate from Monostroma nitidum against herpes simplex virus type 2, the synthesized oligosaccharides, bearing different orthogonal protecting groups (i...
November 14, 2017: Carbohydrate Research
https://www.readbyqxmd.com/read/29156369/mixed-bacterial-culture-mediated-direct-conversion-of-bio-glycerol-to-diols
#6
Roopa Parate, Rasika Mane, Mahesh Dharne, Chandrashekhar Rode
Direct and economic transformation of biodiesel derived crude glycerol is gaining more significance. During screening of bacterial cultures Klebsiella pneumoniae and Enterobacter aerogenes were able to convert crude bio-glycerol to 2,3-butanediol (2,3-BDO) and 1,3-propanediol (1,3-PDO), as major compounds, ethanol and acetoin as minor compounds, with a conversion of 69% and 79% respectively. Process optimization could achieve maximum conversion at pH 7.0, 37 °C, 30-40 g/L glycerol and 1.5 g of inoculum until 120 h...
November 10, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29156337/facile-preparation-of-core-cross-linked-nanomicelles-based-on-graft-copolymers-with-ph-responsivity-and-reduction-sensitivity-for-doxorubicin-delivery
#7
Tiandong Chen, Yi Xiao, Wei Lu, Shiyuan Liu, Lin Gan, Jiahui Yu, Jin Huang
To achieve passive targeting and controlled drug release at tumor sites trigged by low pH value and high level of glutathione (GSH), optimized delivery system for doxorubicin (DOX) based on core cross-linked nanomicelles was developed in this research. Particularly, methoxypoly(ethylene glycol)-nitrophenyl carbonate (mPEG-NPC) and 3,4-dihydroxyphenylaceticacid were grafted onto synthesized poly(N,N'-cystamine bisacrylamide-N-Boc-1,2-diaminoethane) (poly(CBA-DAE)) to give methoxypoly(ethylene glycol)-g-poly(N,N'-cystamine bisacrylamide-N-Boc-1, 2-diaminoethane)-g-3, 4-dihydroxyphenylaceticacid (mPEG-g-SS-PCD-DA)...
November 16, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29156174/harvey-feigenbaum-md-and-the-creation-of-clinical-echocardiography-a-conversation-with-barry-j-maron-md
#8
Barry J Maron
No abstract text is available yet for this article.
December 1, 2017: American Journal of Cardiology
https://www.readbyqxmd.com/read/29156126/two-dimensional-tantalum-carbide-mxenes-composite-nanosheets-for-multiple-imaging-guided-photothermal-tumor-ablation
#9
Chen Dai, Yu Chen, Xiangxiang Jing, Lihua Xiang, Dayang Yang, Han Lin, Zhuang Liu, Xiaoxia Han, Rong Wu
MXenes, an emerging family of graphene-analogues two-dimensional (2D) materials, have attracted continuous and tremendous attentions in many application fields because of their intrinsic physiochemical properties and high performance in versatile applications. In this work, we report on the construction of tantalum carbide (Ta4C3) MXene-based composite nanosheets for multiple imaging-guided photothermal tumor ablation, which has been achieved by rational choice of the composition of MXenes and their surface functionalization...
November 20, 2017: ACS Nano
https://www.readbyqxmd.com/read/29155984/cysteine-rich-angiogenic-inducer-61-cyr61-a-novel-soluble-biomarker-of-acute-myocardial-injury-improves-risk-stratification-after-acute-coronary-syndromes
#10
Roland Klingenberg, Soheila Aghlmandi, Christoph Liebetrau, Lorenz Räber, Baris Gencer, David Nanchen, David Carballo, Alexander Akhmedov, Fabrizio Montecucco, Stefan Zoller, Chad Brokopp, Dik Heg, Peter Jüni, Helena Marti Soler, Pedro-Manuel Marques-Vidal, Peter Vollenweider, Oliver Dörr, Nicolas Rodondi, François Mach, Stephan Windecker, Ulf Landmesser, Arnold von Eckardstein, Christian W Hamm, Christian M Matter, Thomas F Lüscher
Aims: We aimed to identify a novel biomarker involved in the early events leading to an acute coronary syndrome (ACS) and evaluate its role in diagnosis and risk stratification. Methods and results: Biomarker identification was based on gene expression profiling. In coronary thrombi of ACS patients, cysteine-rich angiogenic inducer 61 (Cyr61, CCN1) gene transcripts were highly up-regulated compared with peripheral mononuclear cells. In a murine ischaemia-reperfusion model (I/R), myocardial Cyr61 expression was markedly increased compared with the controls...
November 16, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29155926/codon-usage-and-codon-pair-patterns-in-non-grass-monocot-genomes
#11
Purabi Mazumdar, RofinaYasmin Binti Othman, Katharina Mebus, N Ramakrishnan, Jennifer Ann Harikrishna
Background and Aims: Studies on codon usage in monocots have focused on grasses, and observed patterns of this taxon were generalized to all monocot species. Here, non-grass monocot species were analysed to investigate the differences between grass and non-grass monocots. Methods: First, studies of codon usage in monocots were reviewed. The current information was then extended regarding codon usage, as well as codon-pair context bias, using four completely sequenced non-grass monocot genomes (Musa acuminata, Musa balbisiana, Phoenix dactylifera and Spirodela polyrhiza) for which comparable transcriptome datasets are available...
November 16, 2017: Annals of Botany
https://www.readbyqxmd.com/read/29155914/the-surface-plasmon-resonance-thermal-support-and-size-effect-induced-photocatalytic-activity-enhancement-of-au-reduced-graphene-oxide-for-selective-oxidation-of-benzylic-alcohols
#12
Yanhui Zhang, Hongxu Guo, Wen Weng, Ming-Lai Fu
Reduced graphene oxide (RGO) as an electron-conductive medium and photosensitizer have been widely used to construct efficient RGO/semiconductor photocatalysts for solar energy conversion; however, the role of RGO has been largely underestimated. Herein, the surface plasmon resonance (SPR) effect, thermal effect, support effect, and size effect of Au/RGO are demonstrated to play important roles in enhancing the photocatalytic activity, which has not been considered previously. Au/RGO nanocomposites, synthesized via a facile wet chemistry route, exhibit an excellent visible light photocatalytic performance for selective oxidation of benzylic alcohols...
November 20, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29155897/advances-in-applied-homeostatic-modelling-of-the-relationship-between-thyrotropin-and-free-thyroxine
#13
Rudolf Hoermann, John Edward Maurice Midgley, Rolf Larisch, Johannes Wolfgang Christian Dietrich
INTRODUCTION: The relationship between pituitary TSH and thyroid hormones is central to our understanding of thyroid physiology and thyroid function testing. Here, we generated distribution patterns by using validated tools of thyroid modelling. METHODS: We simulated patterns of individual set points under various conditions, based on a homeostatic model of thyroid feedback control. These were compared with observed data points derived from clinical trials. RESULTS: A random mix of individual set points was reconstructed by simulative modelling with defined structural parameters...
2017: PloS One
https://www.readbyqxmd.com/read/29155818/snail1-mediated-downregulation-of-foxa-proteins-facilitates-the-inactivation-of-transcriptional-enhancer-elements-at-key-epithelial-genes-in-colorectal-cancer-cells
#14
Sabine Jägle, Hauke Busch, Vivien Freihen, Sven Beyes, Monika Schrempp, Melanie Boerries, Andreas Hecht
Phenotypic conversion of tumor cells through epithelial-mesenchymal transition (EMT) requires massive gene expression changes. How these are brought about is not clear. Here we examined the impact of the EMT master regulator SNAIL1 on the FOXA family of transcription factors which are distinguished by their particular competence to induce chromatin reorganization for the activation of transcriptional enhancer elements. We show that the expression of SNAIL1 and FOXA genes is anticorrelated in transcriptomes of colorectal tumors and cell lines...
November 20, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/29155800/nicotinic-receptors-mediate-stress-nicotine-detrimental-interplay-via-dopamine-cells-activity
#15
C Morel, S P Fernandez, F Pantouli, F J Meye, F Marti, S Tolu, S Parnaudeau, H Marie, F Tronche, U Maskos, M Moretti, C Gotti, M-H Han, A Bailey, M Mameli, J Barik, P Faure
Epidemiological studies report strong association between mood disorders and tobacco addiction. This high comorbidity requires adequate treatment but the underlying mechanisms are unknown. We demonstrate that nicotine exposure, independent of drug withdrawal effects, increases stress sensitivity, a major risk factor in mood disorders. Nicotine and stress concur to induce long-lasting cellular adaptations within the dopamine (DA) system. This interplay is underpinned by marked remodeling of nicotinic systems, causing increased ventral tegmental area (VTA) DA neurons' activity and stress-related behaviors, such as social aversion...
July 25, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29155793/metabolic-support-of-excised-living-brain-tissues-during-magnetic-resonance-microscopy-acquisition
#16
Jeremy J Flint, Kannan Menon, Brian Hansen, John Forder, Stephen J Blackband
This protocol describes the procedures necessary to support normal metabolic functions of acute brain slice preparations during the collection of magnetic resonance (MR) microscopy data. While it is possible to perform MR collections on living, excised mammalian tissue, such experiments have traditionally been constrained by resolution limits and are thus incapable of visualizing tissue microstructure. Conversely, MR protocols that did achieve microscopic image resolution required the use of fixed samples to accommodate the need for static, unchanging conditions over lengthy scan times...
October 18, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/29155579/catalytic-conversion-of-carbohydrates-to-initial-platform-chemicals-chemistry-and-sustainability
#17
László T Mika, Edit Cséfalvay, Áron Németh
The replacement of fossil resources that currently provide more than 90% of our energy needs and feedstocks of the chemical industry in combination with reduced emission of carbon dioxide is one of the most pressing challenges of mankind. Biomass as a globally available resource has been proposed as an alternative feedstock for production of basic building blocks, which could partially or even fully replace the currently utilized fossil-based ones in well-established chemical processes. The destruction of lignocellulosic feed followed by oxygen removal from its cellulose and hemicellulose content by catalytic processes results in the formation of initial platform chemicals (IPCs)...
November 20, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/29155571/oxygen-activation-by-cu-lpmos-in-recalcitrant-carbohydrate-polysaccharide-conversion-to-monomer-sugars
#18
Katlyn K Meier, Stephen M Jones, Thijs Kaper, Henrik Hansson, Martijn J Koetsier, Saeid Karkehabadi, Edward I Solomon, Mats Sandgren, Bradley Kelemen
Natural carbohydrate polymers such as starch, cellulose, and chitin provide renewable alternatives to fossil fuels as a source for fuels and materials. As such, there is considerable interest in their conversion for industrial purposes, which is evidenced by the established and emerging markets for products derived from these natural polymers. In many cases, this is achieved via industrial processes that use enzymes to break down carbohydrates to monomer sugars. One of the major challenges facing large-scale industrial applications utilizing natural carbohydrate polymers is rooted in the fact that naturally occurring forms of starch, cellulose, and chitin can have tightly packed organizations of polymer chains with low hydration levels, giving rise to crystalline structures that are highly recalcitrant to enzymatic degradation...
November 20, 2017: Chemical Reviews
https://www.readbyqxmd.com/read/29155561/fabrication-of-csxfa1-xpbi3-mixed-cation-perovskites-via-gas-phase-assisted-compositional-modulation-for-efficient-and-stable-photovoltaic-devices
#19
Paifeng Luo, Shengwen Zhou, Yugang Zhou, Wei Xia, Lin Sun, Jigui Cheng, Chenxi Xu, Yingwei Lu
Over the past few years, significant attention has been focused on HC(NH2)2PbI3 (FAPbI3) perovskite due to their reduced band gap and enhanced thermal stability compared with the most studied CH3NH3PbI3 (MAPbI3). However, FAPbI3 is sensitive to moisture and also encounters serious structural phase-transition from photoactive -phase to photoinactive -phase. Herein, we first develop a novel FAI gas-phase assisted mixed-cation compositional modulation method to fabricate CsxFA1-xPbI3 perovskite solar cells (PSCs), and realize the structural stabilization of -phase FAPbI3 with the incorporation of smaller inorganic Cs+ ions...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29155560/asymmetric-assembling-of-iron-oxide-nanocubes-for-improving-magnetic-hyperthermia-performance
#20
Dina Niculaes, Aidin Lak, George C Anyfantis, Sergio Marras, Oliver Laslett, Sahitya K Avugadda, Marco Cassani, David Serantes, Ondrej Hovorka, Roy Chantrell, Teresa Pellegrino
agnetic hyperthermia (MH) based on magnetic nanoparticles (MNPs) is a promising adjuvant therapy for cancer treatment. Particle clustering leading to complex magnetic interactions affects the heat generated by MNPs during MH. The heat efficiencies, theoretically predicted, are still poorly understood because of lack of the control of the fabrication of such clusters with defined geometries and thus their functionality. This study aims to correlate the heating efficiency under MH of individually coated iron oxide nanocubes (IONCs) vs...
November 20, 2017: ACS Nano
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