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https://www.readbyqxmd.com/read/28440734/cholinergic-activation-suppresses-palmitate-induced-macrophage-activation-and-improves-acylation-stimulating-protein-resistance-in-co-cultured-adipocytes
#1
Jing Wu, Zhou-Yang Jiao, Rui-Zhen Li, Hui-Ling Lu, Hao-Hao Zhang, Katherine Cianflone
Acylation-stimulating protein (ASP), produced through activation of the alternative complement immune system, modulates lipid metabolism. Using a trans-well co-culture cell model, the mitigating role of α7-nicotinic acetylcholine receptor (α7nAChR)-mediated cholinergic pathway on ASP resistance was evaluated. ASP signaling in adipocytes via its receptor C5L2 and signaling intermediates Gαq, Gβ, phosphorylated protein kinase C-α, and protein kinase C-ζ were markedly suppressed in the presence of TNFα or medium from palmitate-treated RAW264...
May 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/28440616/discovery-and-characterization-of-a-eukaryotic-initiation-factor-4a-3-selective-inhibitor-that-suppresses-nonsense-mediated-mrna-decay
#2
Misa Iwatani-Yoshihara, Masahiro Ito, Yoshihiro Ishibashi, Hideyuki Oki, Toshio Tanaka, Daisuke Morishita, Takashi Ito, Hiromichi Kimura, Yasuhiro Imaeda, Samuel A Aparicio, Atsushi Nakanishi, Tomohiro Kawamoto
Eukaryotic initiation factor 4A-3 (eIF4A3) is an Asp-Glu-Ala-Asp (DEAD) box-family adenosine triphosphate (ATP)-dependent RNA helicase. Subtypes eIF4A1 and eIF4A2 are required for translation initiation, but eIF4A3 participates in the exon junction complex (EJC) and functions in RNA metabolism including nonsense-mediated RNA decay (NMD). No small molecules for NMD inhibition via selective inhibition of eIF4A3 have been discovered. Here we identified allosteric eIF4A3 inhibitors from a high-throughput screening campaign...
April 25, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28440015/hypertriglyceridemia-during-asparaginase-treatment-in-children-with-acute-lymphoblastic-leukemia-correlates-with-antithrombin-activity-in-adolescents
#3
Lisa Persson, Arja Harila-Saari, Ida Hed Myrberg, Mats Heyman, Anna Nilsson, Susanna Ranta
BACKGROUND: Asparaginase (ASP) is a cornerstone in the treatment of acute lymphoblastic leukemia (ALL). It is also known for its ability to cause side effects, such as allergy and pancreatitis, as well as lipid and coagulation disturbances. The most important laboratory abnormalities are hypertriglyceridemia (HTG) and low antithrombin (AT). HTG is usually considered to be transient and benign in children with ALL, whereas low AT activity predisposes to thrombosis. Studies on the incidence and significance of HTG in children with ALL are scarce, and their findings have not always been congruent...
April 25, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28439300/genetic-variants-of-helicobacter-pylori-type-iv-secretion-system-components-cagl-and-cagi-and-their-association-with-clinical-outcomes
#4
Hirofumi Ogawa, Akira Iwamoto, Toshihito Tanahashi, Rina Okada, Koji Yamamoto, Shin Nishiumi, Masaru Yoshida, Takeshi Azuma
BACKGROUND: Helicobacter pylori infection is associated with risk for chronic gastritis (CG), gastric ulcer (GU), duodenal ulcer (DU), and gastric cancer (GC). The H. pylori Cag type IV secretion system (TFSS) translocates the virulence factor cytotoxin-associated gene A protein into host cells and plays an important role in initiating gastric carcinogenesis. The CagL and CagI proteins are components of the TFSS. The Arg-Gly-Asp (RGD) motif of CagL, and the six most distal C-terminal amino acids (Ser-Lys-Ile-Ile-Val-Lys, and Ser-Lys-Val-Ile-Val-Lys) of CagL and CagI are essential for TFSS adhesion to host cells...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/28439078/possible-association-between-sirt1-single-nucleotide-polymorphisms-and-predisposition-to-antisocial-personality-traits-in-chinese-adolescents
#5
Hongjuan Chang, Qiuge Yan, Jie Tang, Juan Huang, Yanmei Zhang, Yuqiao Ma, Xiaozhou Ye, Lina Tang, Linguo Wu, Chunxia Wu, Yizhen Yu
Accumulating evidence suggests an association between the SIRT1 gene and human psychiatric disorders. The aim of the study was to investigate the association between SIRT1 and predisposition to antisocial personality traits (ASP) in Chinese adolescents. Participants consisted of 327 controls and 261 juvenile offenders who were diagnosed with predisposition to ASP according to the Personality Diagnostic Questionnaire. Four tag single nucleotide polymorphisms (tagSNPs) of SIRT1, namely rs12778366, rs7896005, rs10823112, and rs4746720, were genotyped...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28438664/simultaneous-measurement-of-aspartate-naa-and-naag-using-hermes-spectral-editing-at-3-tesla
#6
Kimberly L Chan, Muhammad G Saleh, Georg Oeltzschner, Peter B Barker, Richard A E Edden
It has previously been shown that the HERMES method ('Hadamard Encoding and Reconstruction of MEGA-Edited Spectroscopy') can be used to simultaneously edit pairs of metabolites (such as N-acetyl-aspartate (NAA) and N-acetyl aspartyl glutamate (NAAG), or glutathione and GABA). In this study, HERMES is extended for the simultaneous editing of three overlapping signals, and illustrated for the example of NAA, NAAG and Aspartate (Asp). Density-matrix simulations were performed in order to optimize the HERMES sequence...
April 21, 2017: NeuroImage
https://www.readbyqxmd.com/read/28438599/newly-identified-invertebrate-type-lysozyme-splys-i-in-mud-crab-scylla-paramamosain-exhibiting-muramidase-deficient-antimicrobial-activity
#7
Jian Zhou, Shu Zhao, Wen-Hong Fang, Jun-Fang Zhou, Jing-Xiao Zhang, Hongyu Ma, Jiang-Feng Lan, Xin-Cang Li
Lysozymes are widely distributed immune effectors exerting muramidase activity against the peptidoglycan of the bacterial cell wall to trigger cell lysis. However, some invertebrate-type (i-type) lysozymes deficient of muramidase activity still exhibit antimicrobial activity. To date, the mechanism underlying the antimicrobial effect of muramidase-deficient i-type lysozymes remains unclear. Accordingly, this study characterized a novel i-type lysozyme, Splys-i, in the mud crab Scylla paramamosain. Splys-i shared the highest identity with the Litopenaeus vannamei i-type lysozyme (Lvlys-i2, 54% identity) at the amino acid level...
April 21, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28438025/fusion-of-polymeric-material-binding-peptide-to-cell-adhesion-artificial-proteins-enhances-their-biological-function
#8
Tomonori Waku, Yuko Imanishi, Yuta Yoshino, Shigeru Kunugi, Takeshi Serizawa, Naoki Tanaka
Orientation-controlled protein immobilization on a solid substrate surface is important for the development of biomedical materials such as scaffolds used in tissue engineering. In this study, the authors demonstrated that the introduction of material-binding peptides (MBPs) in Arg-Gly-Asp (RGD)-fused artificial proteins called blocking peptide fragment (BPF), which are fragments (residues 419-607) of the molecular chaperone DnaK, enhances the oriented adsorption of proteins on the polymer surface and improves their cell adhesion capability...
April 24, 2017: Biointerphases
https://www.readbyqxmd.com/read/28436967/microtubule-minus-end-regulation-at-spindle-poles-by-an-aspm-katanin-complex
#9
Kai Jiang, Lenka Rezabkova, Shasha Hua, Qingyang Liu, Guido Capitani, A F Maarten Altelaar, Albert J R Heck, Richard A Kammerer, Michel O Steinmetz, Anna Akhmanova
ASPM (known as Asp in fly and ASPM-1 in worm) is a microcephaly-associated protein family that regulates spindle architecture, but the underlying mechanism is poorly understood. Here, we show that ASPM forms a complex with another protein linked to microcephaly, the microtubule-severing ATPase katanin. ASPM and katanin localize to spindle poles in a mutually dependent manner and regulate spindle flux. X-ray crystallography revealed that the heterodimer formed by the N- and C-terminal domains of the katanin subunits p60 and p80, respectively, binds conserved motifs in ASPM...
April 24, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28436716/skin-score-correlates-with-global-dna-methylation-and-gsto1-a140d-polymorphism-in-arsenic-affected-population-of-eastern-india
#10
Moumita Majumder, Uma B DasGupta, D N Guha Mazumder, Nilansu Das
Arsenic is a potent environmental toxicant causing serious public health concerns in India, Bangladesh and other parts of the world. Gene and promoter specific hypermethylation has been reported in different arsenic exposed cell lines, whereas whole genome DNA methylation study suggested genomic hypo and hypermethylation after arsenic exposure in in-vitro and in-vivo studies. Along with other characteristic biomarkers, arsenic toxicity leads to typical skin lesions. The present study demonstrates significant correlation between severities of skin manifestations with their whole genome DNA methylation status as well as with a particular polymorphism (Ala 140 Asp) status in arsenic metabolizing enzyme Glutathione S-transferase Omega-1 (GSTO1) in arsenic exposed population of the district of Nadia, West Bengal, India...
April 24, 2017: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/28436558/adverse-effects-of-pegaspargase-in-pediatric-patients-receiving-doses-greater-than-3-750%C3%A2-iu
#11
Rachel Lebovic, Natalie Pearce, Laura Lacey, James Xenakis, Cassidy B Faircloth, Patrick Thompson
BACKGROUND: Increased toxicities have been identified with higher doses of pegaspargase (PEG-ASP) in adults. This has led to routine use of a dose cap of 3,750 IU for adult acute lymphoblastic leukemia (ALL) patients in most institutions. In pediatric ALL patients, PEG-ASP is not capped. There is concern at our institution that larger doses may result in increased rates of adverse effects and that increased monitoring may be warranted in pediatric patients receiving doses greater than 3,750 IU...
April 24, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28435772/self-assembled-bifunctional-peptide-as-effective-drug-delivery-vector-with-powerful-antitumor-activity
#12
Rangrang Fan, Lan Mei, Xiang Gao, Yuelong Wang, Mingli Xiang, Yu Zheng, Aiping Tong, Xiaoning Zhang, Bo Han, Liangxue Zhou, Peng Mi, Chao You, Zhiyong Qian, Yuquan Wei, Gang Guo
E-cadherin/catenin complex is crucial for cancer cell migration and invasion. The histidine-alanine-valine (HAV) sequence has been shown to inhibit a variety of cadherin-based functions. In this study, by fusing HAV and the classical tumor-targeting Arg-Gly-Asp (RGD) motif and Asn-Gly-Arg (NGR) motif to the apoptosis-inducing peptide sequence-AVPIAQK, a bifunctional peptide has been constructed with enhanced tumor targeting and apoptosis effects. This peptide is further processed as a nanoscale vector to encapsulate the hydrophobic drug docetaxel (DOC)...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28434875/covalent-protein-labeling-at-glutamic-acids
#13
Pablo Martín-Gago, Eyad K Fansa, Michael Winzker, Sandip Murarka, Petra Janning, Carsten Schultz-Fademrecht, Matthias Baumann, Alfred Wittinghofer, Herbert Waldmann
Covalent labeling of amino acids in proteins by reactive small molecules, in particular at cysteine SH and lysine NH groups, is a powerful approach to identify and characterize proteins and their functions. However, for the less-reactive carboxylic acids present in Asp and Glu, hardly any methodology is available. Employing the lipoprotein binding chaperone PDE6δ as an example, we demonstrate that incorporation of isoxazolium salts that resemble the structure and reactivity of Woodward's reagent K into protein ligands provides a novel method for selective covalent targeting of binding site carboxylic acids in whole proteomes...
April 13, 2017: Cell Chemical Biology
https://www.readbyqxmd.com/read/28434301/an-asp-to-asn-mutation-is-a-toxic-trigger-in-beta-2-microglobulin-structure-and-biophysics
#14
Matteo de Rosa, Levon Halabelian, Alberto Barbiroli, Martino Bolognesi, Vittorio Bellotti, Stefano Ricagno
No abstract text is available yet for this article.
March 2017: Amyloid: the International Journal of Experimental and Clinical Investigation
https://www.readbyqxmd.com/read/28432544/expression-of-cphb-and-cphe-type-cyanophycinases-in-cyanophycin-producing-tobacco-and-comparison-of-their-ability-to-degrade-cyanophycin-in-plant-and-plant-extracts
#15
Daniel Ponndorf, Inge Broer, Henrik Nausch
Increasing the arginine (Arg) content in plants used as feed or food is of interest, since the supplementation of food with conditionally essential Arg has been shown to have nutritional benefits. An increase was achieved by the expression of the Arg-rich bacterial storage component, cyanophycin (CGP), in the chloroplast of transgenic plants. CGP is stable in plants and its degradation into β-aspartic acid (Asp)-Arg dipeptides, is solely catalyzed by bacterial cyanophycinases (CGPase). Dipeptides can be absorbed by animals even more efficiently than free amino acids (Matthews and Adibi 1976; Wenzel et al...
April 21, 2017: Transgenic Research
https://www.readbyqxmd.com/read/28431847/guideline-compliance-and-clinical-outcomes-among-patients-with-staphylococcus-aureus-bacteremia-with-infectious-diseases-consultation-in-addition-to-antimicrobial-stewardship-directed-review
#16
Kevin Buehrle, Jennifer Pisano, Zhe Han, Natasha N Pettit
OBJECTIVE: Previous studies have shown infectious diseases consultation (IDC) for Staphylococcus aureus bacteremia (SAB) improves management and outcomes. The influence of IDC on outcomes for SAB in addition to an antimicrobial stewardship program (ASP) review for adult inpatients with SAB has not been evaluated. The purpose of this study was to investigate the effect of IDC on SAB management with concomitant ASP review and resulting outcomes. METHODS: Adult inpatients with SAB admitted December 2012-October 2014 were included...
April 18, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28426938/high-throughput-screening-to-identify-inhibitors-of-dead-box-helicase-ddx41
#17
Mariko Yoneyama-Hirozane, Mitsuyo Kondo, Shin-Ichi Matsumoto, Akiko Morikawa-Oki, Daisuke Morishita, Atsushi Nakanishi, Tomohiro Kawamoto, Masaharu Nakayama
The human DEAD (Asp-Glu-Ala-Asp) box protein DDX41, a member of the DEXDc helicase family, has nucleic acid-dependent ATPase and RNA and DNA translocase and unwinding activities. DDX41 is affected by somatic mutations in sporadic cases of myeloid neoplasms as well as in a biallelic fashion in 50% of patients with germline DDX41 mutations. The R525H mutation in DDX41 is thought to play important roles in the development of hereditary myelodysplastic syndrome and acute myelocytic leukemia. In this study, human DDX41 and its R525H mutant (R525H) were expressed in Escherichia coli and purified...
April 1, 2017: SLAS Discovery
https://www.readbyqxmd.com/read/28425717/an-experimental-and-molecular-dynamics-study-of-red-fluorescent-protein-mcherry-in-novel-aqueous-amino-acid-ionic-liquids
#18
Kelsey L Borrell, Christine Cancglin, Brittany L Stinger, Kelsey G DeFrates, Gregory A Caputo, Chun Wu, Timothy D Vaden
The search for biocompatible ionic liquids (ILs) with novel biochemical and biomedical applications has recently gained greater attention. In this report we characterize the effects of two novel amino acid-based aqueous ILs composed of tetramethylguanidinium (TMG) and amino acids on the structure and stability of a widely used red fluorescent protein (mCherry). Our experimental data shows that while the aspartic acid-based IL (TMGAsp) has effects similar to previously-studied conventional ILs (BMIBF4, EMIAc, and TMGAc), the alanine-based IL (TMGAla) has a much stronger destabilization effect on the protein structure...
April 20, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28424261/zinc-absorption-from-milk-is-affected-by-dilution-but-not-by-thermal-processing-and-milk-enhances-absorption-of-zinc-from-high-phytate-rice-in-young-dutch-women
#19
Elise F Talsma, Diego Moretti, Sou Chheng Ly, Renske Dekkers, Ellen Ghm van den Heuvel, Aditia Fitri, Esther Boelsma, Tjeerd Jan Stomph, Christophe Zeder, Alida Melse-Boonstra
Background: Milk has been suggested to increase zinc absorption. The effect of processing and the ability of milk to enhance zinc absorption from other foods has not been measured directly in humans.Objective: We aimed to assess zinc absorption from 1) milk undergoing various processing and preparatory steps and 2) from intrinsically labeled high-phytate rice consumed with milk or water.Methods: Two randomized crossover studies were conducted in healthy young women [age:18-25 y; body mass index (in kg/m(2)): 20-25]: 1) a milk study (n = 19) comparing the consumption of 800 mL full-fat ultra-high temperature (UHT) milk [heat-treated milk (HTM)], full-fat UHT milk diluted 1:1 with water [heat-treated milk and water (MW)], water, or unprocessed (raw) milk (UM), each extrinsically labeled with (67)Zn, and 2) a rice study (n = 18) comparing the consumption of 90 g intrinsically (67)Zn-labeled rice with 600 mL of water [rice and water (RW)] or full-fat UHT milk [rice and milk (RM)]...
April 19, 2017: Journal of Nutrition
https://www.readbyqxmd.com/read/28422300/platelet-reactivity-in-response-to-loading-dose-of-atorvastatin-or-rosuvastatin-in-patients-with-stable-coronary-disease-before-percutaneous-coronary-intervention-the-statiplat-randomized-study
#20
Cosmo Godino, Anna Giulia Pavon, Antonio Mangieri, Anna Salerno, Michela Cera, Alberto Monello, Alaide Chieffo, Valeria Magni, Alberto Cappelletti, Alberto Margonato, Antonio Colombo
BACKGROUND: The acute effects of statin loading dose (LD) on platelet reactivity in patients with chronic stable angina (CSA) are not completely clear. HYPOTHESIS: We hypothesized that LDs of atorvastatin and rosuvastatin have different pharmacodynamic acute effects on platelet aggregability in CSA patients with baseline normal platelet reactivity while on dual antiplatelet therapy (DAPT). METHODS: From September 2011 to February 2014, all consecutive CSA patients on chronic DAPT (aspirin and clopidogrel) were evaluated before elective percutaneous coronary intervention (PCI)...
April 19, 2017: Clinical Cardiology
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