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https://www.readbyqxmd.com/read/28696071/conversion-of-cellulose-to-amphiphilic-alkyl-glycosides-catalyzed-by-aquivion-a-perfluorosulfonic-acid-polymer
#1
François Jérôme, Karine De Oliveira Vigier, Ayman Karam, Boris Estrine, Sinisa Marincovic, Claudio Oldani
Aquivion PFSA PW98 is an amphiphilic solid superacid capable of converting cellulose to Amphiphilic Alkyl Glycosides (AAG) in 85% yield (i.e. 97% selectivity). The present process involves (1) a mechanocatalytic depolymerization of cellulose followed by (2) a direct glycosylation with n-dodecanol. In comparison to H2SO4 and solid acid catalysts commonly employed in cellulose processing, Aquivion PFSA PW98 is not only recyclable but also exhibits superior catalytic performances in terms of yield, selectivity and reactor productivity...
July 11, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28693932/muscle-tissue-saturation-compared-with-muscle-tissue-perfusion-during-low-blood-flows-an-experimental-study
#2
Sisse Anette Thomassen, Benedict Kjærgaard, Aage Kristian Olsen Alstrup, Ole Lajord Munk, Jørgen Frøkiær, Anders Larsson, Bodil Steen Rasmussen
OBJECTIVE: To investigate whether changes in muscle tissue perfusion measured with positron emission tomography would be reflected by parallel changes in muscle tissue oxygen saturation (StO2) measured using near-infrared spectroscopy during high and low blood flow levels achieved using cardiopulmonary bypass (CPB) in an animal model. DESIGN: A prospective, randomized study. SETTING: Research laboratory, single institution. PARTICIPANTS: Eight pigs (69-71 kg)...
March 22, 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28681940/transcriptional-regulation-of-runx2-by-hsp90-controls-osteosarcoma-apoptosis-via-the-akt-gsk-3%C3%AE-%C3%AE-catenin-signaling
#3
Gui-Hong Liang, Ning Liu, Ming-Tang He, Jie Yang, Zu-Jian Liang, Xue-Juan Gao, Ali Hasan Rahhal, Qing-Yu He, Huan-Tian Zhang, Zhen-Gang Zha
Osteosarcoma (OS) is the most malignant primary bone tumor in children and adolescents with limited treatment options and poor prognosis. Recently, aberrant expression of Runx2 has been found in OS, thereby contributing to the development and progression of OS. However, the upstream signaling molecules that regulate its expression in OS remain largely unknown. In the present study, we first confirmed that the inhibition of HSP90 with 17-AAG caused significant apoptosis of OS cells via a caspase-3-dependent mechanism, and that inhibition or knockdown of HSP90 by 17-AAG or siRNAs significantly suppressed mRNA and protein expression of Runx2...
July 6, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28666092/characterization-of-genome-in-tetraploid-sty-species-of-elymus-triticeae-poaceae-using-sequential-fish-and-gish
#4
Ruijuan Liu, Richard R-C Wang, Feng Yu, Xingwang Lu, Quanwen Dou
Genomes of ten species of Elymus, either presumed or known as tetraploid StY, were characterized using fluorescence in situ hybridization (FISH) and genomic in situ hybridization (GISH). These tetraploid species could be grouped into three categories. Type I included StY genome reported species-Roegneria pendulina, R. nutans, R. glaberrima, R. ciliaris, and Elymus nevskii, and StY genome presumed species-R. sinica, R. breviglumis, and R. dura, whose genome could be separated into two sets based on different GISH intensities...
June 30, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28642708/myricitrin-protects-cardiomyocytes-from-hypoxia-reoxygenation-injury-involvement-of-heat-shock-protein-90
#5
Min Wang, Gui-Bo Sun, Yu-Yang Du, Yu Tian, Ping Liao, Xue-Song Liu, Jing-Xue Ye, Xiao-Bo Sun
Modulation of oxidative stress is therapeutically effective in ischemia/reperfusion (I/R) injury. Myricitrin, a naturally occurring phenolic compound, is a potent antioxidant. However, little is known about its effect on I/R injury to cardiac myocytes. The present study was performed to investigate the potential protective effect of myricitrin against hypoxia/reoxygenation (H/R)-induced H9c2 cardiomyocyte injury and its underlying mechanisms. Myricitrin pretreatment improved cardiomyocyte viability, inhibited ROS generation, maintained the mitochondrial membrane potential, reduced apoptotic cardiomyocytes, decreased the caspase-3 activity, upregulated antiapoptotic proteins and downregulated proapoptotic proteins during H/R injury...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28642202/engineering-of-multifunctional-temperature-sensitive-liposomes-for-synergistic-photothermal-photodynamic-and-chemotherapeutic-effects
#6
Tuan Hiep Tran, Hanh Thuy Nguyen, Nam Van Le, Thi Thu Phuong Tran, Jong Seong Lee, Sae Kwang Ku, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Heterogeneity of cancer cells and drug resistance require multiple therapeutic approaches for comprehensive treatment. In this study, temperature-sensitive liposomes containing anti-cancer agent tanespimycin (17-AAG) and photosensitizer IR 820 were developed for combination of phototherapy and chemotherapy. The temperature-sensitive liposomes composed of DPPC, cholesterol, DSPE-PEG, 17-AAG, and IR 820 (LP-AI) at weight ratio of 35/15/3/2/2 were formulated as a thin film using extrusion and evaluated for particle size, morphology and drug release profile...
June 19, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28640540/the-effects-of-advanced-age-and-serum-%C3%AE-1-acid-glycoprotein-on-docetaxel-unbound-exposure-and-dose-limiting-toxicity-in-cancer-patients
#7
Hirotsugu Kenmotsu, Chiyo K Imamura, Akira Ono, Shota Omori, Kazuhisa Nakashima, Kazushige Wakuda, Tetsuhiko Taira, Tateaki Naito, Haruyasu Murakami, Toshiaki Takahashi, Yusuke Tanigawara
AIM: α1 -Acid glycoprotein (AAG), which is a major binding protein of docetaxel, is considered to be a determinant for docetaxel pharmacokinetics. However, there are no reports about the impact of serum AAG on pharmacokinetics and pharmacodynamics in elderly patients treated with docetaxel. The aim of this prospective study was to elucidate the effects of advanced age and serum AAG on docetaxel unbound exposure and neutropenia, dose-limiting toxicity, in cancer patients. METHODS: Docetaxel was administered at 60 mg/m(2) to 51 patients with non-small cell lung cancer, 17 of whom were ≥ 75 years of age...
June 22, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28637869/heat-shock-proteins-stimulate-apobec-3-mediated-cytidine-deamination-in-the-hepatitis-b-virus
#8
Zhigang Chen, Thomas L Eggerman, Alexander V Bocharov, Irina N Baranova, Tatyana G Vishnyakova, Roger Kurlander, Amy P Patterson
Apolipoprotein B mRNA-editing enzyme catalytic subunit 3 (APOBEC-3) enzymes are cytidine deaminases that are broadly and constitutively expressed. They are often upregulated during carcinogenesis and candidate genes for causing the major single-base substitution in cancer-associated DNA mutations. Moreover, APOBEC-3s are involved in host innate immunity against many viruses. However, how APOBEC-3 mutational activity is regulated in normal and pathological conditions remains largely unknown. Heat shock protein levels are often elevated in both carcinogenesis and viral infection and are associated with DNA mutations...
June 21, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28631426/hsp90%C3%AE-regulates-atm-and-nbn-functions-in-sensing-and-repair-of-dna-double-strand-breaks
#9
Rosa Pennisi, Antonio Antoccia, Stefano Leone, Paolo Ascenzi, Alessandra di Masi
The molecular chaperone heat shock protein 90 (Hsp90α) regulates cells proteostasis and mitigates the harmful effects of endogenous and exogenous stressors on the proteome. Indeed, the inhibition of Hsp90α ATPase activity affects the cellular response to ionizing radiation (IR). Although the interplay between Hsp90α and several DNA damage response (DDR) proteins has been reported, its role in the DDR is still unclear. Here, we show that ATM and NBN, but not 53BP1, RAD50, and MRE11, are Hsp90α clients as the Hsp90α inhibitor 17-(allylamino)-17-demethoxygeldanamycin (17-AAG) induces ATM and NBN polyubiquitination and proteosomal degradation in normal fibroblasts and lymphoblastoid cells lines...
June 20, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28627587/effects-of-salinomycin-and-17%C3%A2-aag-on-proliferation-of-human-gastric-cancer-cells-in%C3%A2-vitro
#10
Zuwen Zhang, Jumei Zhao, Zhikuan Mi, Qiuxia Pang, Aihong Wang, Meini Chen, Xiaobin Liu, Xiaoli Wei, Tao Liu
The aim of the present study was to investigate the effects and mechanisms of 17‑AAG combined with salinomycin treatment on proliferation and apoptosis of the SGC‑7901 gastric cancer cell line. An MTT assay was used to detect the proliferation of SGC‑7901 cells. Morphological alterations of cells were observed under inverted phase‑contrast and fluorescence microscopes. Cell cycle and apoptosis were assessed by flow cytometry analysis. The protein expression of nuclear factor (NF)‑κB p65 and Fas‑ligand (L) were evaluated by immunocytochemistry...
August 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28625129/triamcinolone-acetonide-suppresses-inflammation-and-facilitates-vascular-barrier-function-in-human-retinal-microvascular-endothelial-cells
#11
Shunsuke Imai, Tomohiro Otsuka, Akira Naito, Masamitsu Shimazawa, Hideaki Hara
BACKGROUND: Diabetic macular edema (DME) is resulted from the retinal microvascular leakage that accompanies the breakdown of blood-retinal barrier. Triamcinolone acetonide (TA) is a therapeutic agent for DME, but since the detailed mechanism of action of TA is not known, part of its action was examined. METHODS: In vitro model to enhance the permeability of human retinal microvascular endothelial cells (HRMECs) was constructed by using DME-related cytokines such as vascular endothelial growth factor (VEGF), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β)...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28620980/case-of-autoimmune-autonomic-ganglionopathy-manifesting-anhidrosis
#12
Asuka Yoshifuku, Koichi Yoneda, Yusuke Sakiyama, Osamu Higuchi, Shunya Nakane, Takuro Kanekura
Autoimmune autonomic ganglionopathy (AAG), clinically characterized by gastrointestinal dysmotility, orthostatic hypotension and tonic pupils, is an idiopathic acquired disorder of the autonomic nervous system elicited by antibodies against ganglionic acetylcholine receptor (gAChR). We encountered a 60-year-old man who presented with severe anhidrosis, difficulty in thermoregulation, orthostatic hypotension, gastrointestinal dysmotility, tonic pupils and ptosis. Histologically, an anhidrotic skin sample was normal...
June 16, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28611080/magnetic-resonance-imaging-assessed-inflammation-in-the-wrist-is-associated-with-patient-reported-physical-impairment-global-assessment-of-disease-activity-and-pain-in-early-rheumatoid-arthritis-longitudinal-results-from-two-randomised-controlled-trials
#13
Daniel Glinatsi, Joshua F Baker, Merete L Hetland, Kim Hørslev-Petersen, Bo J Ejbjerg, Kristian Stengaard-Pedersen, Peter Junker, Torkell Ellingsen, Hanne M Lindegaard, Ib Hansen, Tine Lottenburger, Jakob M Møller, Lykke Ørnbjerg, Aage Vestergaard, Anne Grethe Jurik, Henrik S Thomsen, Trine Torfing, Signe Møller-Bisgaard, Mette B Axelsen, Mikkel Østergaard
OBJECTIVES: To examine whether MRI assessed inflammation and damage in the wrist of patients with early rheumatoid arthritis (RA) are associated with patient-reported outcomes (PROs). METHODS: Wrist and hand MRIs of 210 patients with early RA from two investigator-initiated, randomised controlled studies (CIMESTRA/OPERA) were assessed according to the Outcome Measures in Rheumatology RA MRI score (RAMRIS) for synovitis, tenosynovitis, osteitis, bone erosions and joint space narrowing (JSN) at baseline, 1 and 5 years follow-up...
June 13, 2017: Annals of the Rheumatic Diseases
https://www.readbyqxmd.com/read/28606113/magnetic-resonance-imaging-and-computed-tomography-as-tools-for-the-investigation-of-sperm-whale-physeter-macrocephalus-teeth-and-eye
#14
Aage Kristian Olsen Alstrup, Ole Lajord Munk, Trine Hammer Jensen, Lasse Fast Jensen, Abdi Hedayat, Brian Hansen
BACKGROUND: Scanning techniques such as magnetic resonance imaging (MRI) and computed tomography (CT) are useful tools in veterinary and human medicine. Here we demonstrate the usefulness of these techniques in the study of the anatomy of wild marine mammals as part of a necropsy. MRI and CT scans of sperm whale teeth (n = 4) were performed. The methods were compared and further compared to current standard methods for evaluation of tooth layering. For MRI a zero echo time sequence was used, as previously done for imaging of intact human teeth...
June 12, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28604730/large-scale-association-analysis-identifies-new-lung-cancer-susceptibility-loci-and-heterogeneity-in-genetic-susceptibility-across-histological-subtypes
#15
James D McKay, Rayjean J Hung, Younghun Han, Xuchen Zong, Robert Carreras-Torres, David C Christiani, Neil E Caporaso, Mattias Johansson, Xiangjun Xiao, Yafang Li, Jinyoung Byun, Alison Dunning, Karen A Pooley, David C Qian, Xuemei Ji, Geoffrey Liu, Maria N Timofeeva, Stig E Bojesen, Xifeng Wu, Loic Le Marchand, Demetrios Albanes, Heike Bickeböller, Melinda C Aldrich, William S Bush, Adonina Tardon, Gad Rennert, M Dawn Teare, John K Field, Lambertus A Kiemeney, Philip Lazarus, Aage Haugen, Stephen Lam, Matthew B Schabath, Angeline S Andrew, Hongbing Shen, Yun-Chul Hong, Jian-Min Yuan, Pier Alberto Bertazzi, Angela C Pesatori, Yuanqing Ye, Nancy Diao, Li Su, Ruyang Zhang, Yonathan Brhane, Natasha Leighl, Jakob S Johansen, Anders Mellemgaard, Walid Saliba, Christopher A Haiman, Lynne R Wilkens, Ana Fernandez-Somoano, Guillermo Fernandez-Tardon, Henricus F M van der Heijden, Jin Hee Kim, Juncheng Dai, Zhibin Hu, Michael P A Davies, Michael W Marcus, Hans Brunnström, Jonas Manjer, Olle Melander, David C Muller, Kim Overvad, Antonia Trichopoulou, Rosario Tumino, Jennifer A Doherty, Matt P Barnett, Chu Chen, Gary E Goodman, Angela Cox, Fiona Taylor, Penella Woll, Irene Brüske, H-Erich Wichmann, Judith Manz, Thomas R Muley, Angela Risch, Albert Rosenberger, Kjell Grankvist, Mikael Johansson, Frances A Shepherd, Ming-Sound Tsao, Susanne M Arnold, Eric B Haura, Ciprian Bolca, Ivana Holcatova, Vladimir Janout, Milica Kontic, Jolanta Lissowska, Anush Mukeria, Simona Ognjanovic, Tadeusz M Orlowski, Ghislaine Scelo, Beata Swiatkowska, David Zaridze, Per Bakke, Vidar Skaug, Shanbeh Zienolddiny, Eric J Duell, Lesley M Butler, Woon-Puay Koh, Yu-Tang Gao, Richard S Houlston, John McLaughlin, Victoria L Stevens, Philippe Joubert, Maxime Lamontagne, David C Nickle, Ma'en Obeidat, Wim Timens, Bin Zhu, Lei Song, Linda Kachuri, María Soler Artigas, Martin D Tobin, Louise V Wain, Thorunn Rafnar, Thorgeir E Thorgeirsson, Gunnar W Reginsson, Kari Stefansson, Dana B Hancock, Laura J Bierut, Margaret R Spitz, Nathan C Gaddis, Sharon M Lutz, Fangyi Gu, Eric O Johnson, Ahsan Kamal, Claudio Pikielny, Dakai Zhu, Sara Lindströem, Xia Jiang, Rachel F Tyndale, Georgia Chenevix-Trench, Jonathan Beesley, Yohan Bossé, Stephen Chanock, Paul Brennan, Maria Teresa Landi, Christopher I Amos
Although several lung cancer susceptibility loci have been identified, much of the heritability for lung cancer remains unexplained. Here 14,803 cases and 12,262 controls of European descent were genotyped on the OncoArray and combined with existing data for an aggregated genome-wide association study (GWAS) analysis of lung cancer in 29,266 cases and 56,450 controls. We identified 18 susceptibility loci achieving genome-wide significance, including 10 new loci. The new loci highlight the striking heterogeneity in genetic susceptibility across the histological subtypes of lung cancer, with four loci associated with lung cancer overall and six loci associated with lung adenocarcinoma...
July 2017: Nature Genetics
https://www.readbyqxmd.com/read/28594918/obesity-metabolic-factors-and-risk-of-different-histological-types-of-lung-cancer-a-mendelian-randomization-study
#16
Robert Carreras-Torres, Mattias Johansson, Philip C Haycock, Kaitlin H Wade, Caroline L Relton, Richard M Martin, George Davey Smith, Demetrius Albanes, Melinda C Aldrich, Angeline Andrew, Susanne M Arnold, Heike Bickeböller, Stig E Bojesen, Hans Brunnström, Jonas Manjer, Irene Brüske, Neil E Caporaso, Chu Chen, David C Christiani, W Jay Christian, Jennifer A Doherty, Eric J Duell, John K Field, Michael P A Davies, Michael W Marcus, Gary E Goodman, Kjell Grankvist, Aage Haugen, Yun-Chul Hong, Lambertus A Kiemeney, Erik H F M van der Heijden, Peter Kraft, Mikael B Johansson, Stephen Lam, Maria Teresa Landi, Philip Lazarus, Loïc Le Marchand, Geoffrey Liu, Olle Melander, Sungshim L Park, Gad Rennert, Angela Risch, Eric B Haura, Ghislaine Scelo, David Zaridze, Anush Mukeriya, Milan Savić, Jolanta Lissowska, Beata Swiatkowska, Vladimir Janout, Ivana Holcatova, Dana Mates, Matthew B Schabath, Hongbing Shen, Adonina Tardon, M Dawn Teare, Penella Woll, Ming-Sound Tsao, Xifeng Wu, Jian-Min Yuan, Rayjean J Hung, Christopher I Amos, James McKay, Paul Brennan
BACKGROUND: Assessing the relationship between lung cancer and metabolic conditions is challenging because of the confounding effect of tobacco. Mendelian randomization (MR), or the use of genetic instrumental variables to assess causality, may help to identify the metabolic drivers of lung cancer. METHODS AND FINDINGS: We identified genetic instruments for potential metabolic risk factors and evaluated these in relation to risk using 29,266 lung cancer cases (including 11,273 adenocarcinomas, 7,426 squamous cell and 2,664 small cell cases) and 56,450 controls...
2017: PloS One
https://www.readbyqxmd.com/read/28591028/haplotype-based-interaction-of-the-ppargc1a-and-ucp1-genes-is-associated-with-impaired-fasting-glucose-or-type-2-diabetes-mellitus
#17
Xiaoting Pei, Li Liu, Jialin Cai, Wenkai Wei, Yan Shen, Yaxuan Wang, Yanzi Chen, Panpan Sun, Mustapha Umar Imam, Zhiguang Ping, Xiaoli Fu
The aim of this study is to evaluate the effect of single-nucleotide polymorphisms (SNPs) of the PPARGC1A and UCP1 genes on impaired fasting glucose (IFG) or type 2 diabetes mellitus (T2DM) and the haplotype-based interaction between these genes.A cross-sectional study was conducted by cluster sampling in Henan province, China. Based on the level of fasting plasma glucose (FPG) and the history of T2DM, the participants were divided into 2 groups; 83 individuals were in the IFG+DM group (those with IFG or T2DM) and 445 individuals were in the NFPG group (those with normal FPG)...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28556976/exploring-the-radiosynthesis-and-in-vitro-characteristics-of-68-ga-ga-dota-siglec-9
#18
Svend B Jensen, Meeri Käkelä, Lars Jødal, Olli Moisio, Aage K O Alstrup, Sirpa Jalkanen, Anne Roivainen
Vascular adhesion protein 1 is a leukocyte homing-associated glycoprotein, which upon inflammation rapidly translocates from intracellular sources to the endothelial cell surface. It has been discovered that the cyclic peptide residues 283-297 of sialic acid-binding IgG-like lectin 9 (Siglec-9) "CARLSLSWRGLTLCPSK" bind to vascular adhesion protein 1 and hence makes the radioactive analogues of this compound ([(68) Ga]Ga-DOTA-Siglec-9) interesting as a noninvasive visualizing marker of inflammation. Three different approaches to the radiosynthesis of [(68) Ga]Ga-DOTA-Siglec-9 are presented and compared with previously published methods...
May 30, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28554261/plasma-alpha-1-acid-glycoprotein-as-a-potential-predictive-biomarker-for-non-haematological-adverse-events-of-docetaxel-in-breast-cancer-patients
#19
Rafid Salim Jabir, Gwo Fuang Ho, Muhammad Azrif Bin Ahmad Annuar, Johnson Stanslas
CONTEXT: Rash and oral mucositis are major non-haematological adverse events (AEs) of docetaxel, in addition to fatigue, nausea, vomiting and diarrhoea, which restrict the use of the drug in cancer therapy. Alpha-1-acid glycoprotein (AAG) is an acute phase reactant glycoprotein and is a primary carrier of docetaxel in the blood. Docetaxel has extensive binding (>98%) to plasma proteins such as AAG, lipoproteins and albumin. OBJECTIVE: To study the association between plasma AAG level and non-haematological AEs of docetaxel in Malaysian breast cancer patients of three major ethnic groups (Malays, Chinese and Indians)...
June 6, 2017: Biomarkers: Biochemical Indicators of Exposure, Response, and Susceptibility to Chemicals
https://www.readbyqxmd.com/read/28551637/17-allylamino-17-demethoxygeldanamycin-induced-changes-in-18-f-fluorothymidine-uptake
#20
Hang Jung Lee, DO Hyung Kim, Seung Jin Lee
The proliferation status of tumor cells can be imaged using [(18)F]fluorothymidine ([(18)F]FLT), which is trapped by cell cycle-dependent thymidine kinase 1 (TK1). Targeting of heat shock protein 90 (HSP90) disrupts multiple client proteins, leading to heterogeneous cell-cycle phenotypes. To investigate whether [(18)F]FLT uptake reflects the growth arrest caused by various mechanisms of HSP90 inhibition, we used HCT116 cells that were arrested at G0/G1 phase, and Hep3B cells at G2/M phase, by the HSP90 inhibitor 17-AAG...
June 2017: Anticancer Research
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