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https://www.readbyqxmd.com/read/28430376/acute-generalized-exanthematous-pustulosis-associated-with-ipilimumab-and-nivolumab
#1
Basile Page, Luca G Borradori, Helmut Beltraminelli, Nikhil Yawalkar, Robert E Hunger
Acute generalized exanthematous pustulosis (AGEP) is a rare potentially severe adverse cutaneous eruption, that is usually induced by a variety of drugs, most commonly anti-bacterial drugs. AGEP is characterized by the acute development of extensive, non-follicular, sterile pustules on an erythematous background accompanied by systemic symptoms such as fever and leucocytosis.¹ The prognosis is usually favourable, but in elderly patients with comorbidities morbidity and mortality are increased.² This article is protected by copyright...
April 21, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28425565/immunolocalization-of-jian-carp-cyprinus-carpio-var-jian-cathepsin-b-cloning-expression-characterization-and-antibody-preparation
#2
Shu-Hong Li, Ran Li, Hai-Xia Zhong, Xiu-Hua Chen, Ai-Ping Liu, Juan Yang, Qiang Hu, Qin-Qin Ke, Mei-Liang Li
Cathepsin B (CatB) cDNA of 759 bp from Jian carp (Cyprinus carpio var. Jian) with amino acid similarity of 99.6% to common carp was cloned. The mature CatB was expressed in Escherichia coli BL21 transferred with vector CatB-pET-30a. It was purified and identified as a single band (29 kDa) on SDS-PAGE. Optimum CatB activity was observed at 40 °C and pH 5.5. Mouse anti-CatB polyclonal antibody with a high titer of 1:256000 was prepared successfully and shown to specifically recognize the antigen both in prokaryotic cells and in the tissues of Jian carp according to western blotting and immunohistochemistry results...
April 20, 2017: Journal of Food Science
https://www.readbyqxmd.com/read/28423019/design-synthesis-and-structure-activity-relationship-study-of-wollamide-b-a-new-potential-anti-tb-agent
#3
Henok Asfaw, Katja Laqua, Anna Maria Walkowska, Fraser Cunningham, Maria Santos Martinez-Martinez, Juan Carlos Cuevas-Zurita, Lluís Ballell-Pages, Peter Imming
Wollamide B is a cationic antimycobacterial cyclohexapeptide that exhibits activity against Mycobacterium bovis (M. bovis) (IC50 of 3.1 μM). Aiming to define its structural activity relationship (SAR), optimizing potency and pharmacokinetic properties, libraries of analogues were synthesized following a standard Fmoc-based solid phase peptide synthesis approach. The antimycobacterial activities of wollamide B and all the synthesized analogues were tested against Mycobacterium tuberculosis (Mtb) H37Rv. Parallely, in vitro drug metabolism and pharmacokinetic (ADME) profiling was done for the synthesized compounds to evaluate their drug likeness...
2017: PloS One
https://www.readbyqxmd.com/read/28419935/identification-of-a-host-cell-protein-impurity-in-therapeutic-protein-p1
#4
Deepti Ahluwalia, Harbhajan Dhillon, Thomas Slaney, Hangtian Song, Heather Boux, Sheetal Mehta, Lei Zhang, Anulfo Valdeza, Girija Krishnamurthy
Residual host cell proteins (HCPs) are process-related impurities present in biotherapeutics that can pose safety health risks to patients. An adequate control of HCP levels in the final product, and demonstration of HCP clearance throughout a product manufacturing process is critical for all biotherapeutic products. Developing effective downstream purification processes can be challenging as HCPs and product proteins may possess an affinity for each other or have similar physicochemical properties, resulting in co-purification...
April 9, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28409495/antiplatelet-and-anti-proliferative-action-of-disintegrin-from-echis-multisquamatis-snake-venom
#5
Volodymyr Chernyshenko, Natalia Petruk, Darya Korolova, Ludmila Kasatkina, Olha Gornytska, Tetyana Platonova, Tamara Chernyshenko, Andriy Rebriev, Olena Dzhus, Liudmyla Garmanchuk, Eduard Lugovskoy
AIM: To purify the platelet aggregation inhibitor from Echis multisquamatis snake venom (PAIEM) and characterize its effect on platelet aggregation and HeLa cell proliferation. METHODS: Sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and matrix assisted laser desorption/ionization time-of-flight (MALDI-TOF) were used for PAIEM identification. Platelet aggregation in the presence of PAIEM was studied on aggregometer Solar-AP2110. The changes of shape and granularity of platelets in the presence of PAIEM were studied on flow cytometer COULTER EPICS XL, and degranulation of platelets was estimated using spectrofluorimetry...
April 14, 2017: Croatian Medical Journal
https://www.readbyqxmd.com/read/28396683/preparation-and-neutralization-efficacy-of-igy-antibodies-raised-against-deinagkistrodon-acutus-venom
#6
Jinhua Liu, Qiyi He, Wenwen Wang, Bin Zhou, Bo Li, Yingfeng Zhang, Cong Luo, Diancheng Chen, Jia Tang, Xiaodong Yu
BACKGROUND: The five-paced pit viper (Deinagkistrodon acutus), endemic to China and northern Vietnam, is responsible for most snakebites in the Chinese territory. Antivenom produced from horses is the main treatment for snakebites, but it may cause numerous clinical side effects and have other disadvantages involved in their production such as the welfare of animals. The present study was conducted aiming to develop an alternative antibody (IgY) from the egg yolk of leghorn chickens immunized with snake venom...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28395727/-preparation-and-identification-of-the-polyclonal-antibody-against-atrx-c2193-2492
#7
Shuangyang Tang, Zhimin Liu, Ranhui Li, Yan Chen, Lanhua Zhao, Haiyan Shen, Yanping Wan
Objective To prepare the polyclonal antibody against human alpha thalassemia/mental retardation syndrome X-linked (ATRX) C-terminal and study the distribution and expression of ATRX protein in human cervical cancer tissues. Methods The antiserum was obtained from the BALB/c mice immunized with (6)His-ATRX-C2193-2492 protein and then purified by the saturated ammonium sulfate precipitation and affinity chromatography. The titer of anti-ATRX polyclonal antibody was determined by ELISA. Its specificity was identified by SDS-PAGE analysis and Western blotting...
April 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28390830/bmajpla2-ii-a-basic-lys49-phospholipase-a2-homologue-from-bothrops-marajoensis-snake-venom-with-parasiticidal-potential
#8
Amy N Grabner, Jorge Alfonso, Anderson M Kayano, Leandro S Moreira-Dill, Ana Paula de A Dos Santos, Cleópatra A S Caldeira, Juliana C Sobrinho, Ana Gómez, Fernando P Grabner, Fabio F Cardoso, Juliana Pavan Zuliani, Marcos R M Fontes, Daniel C Pimenta, Celeste Vega Gómez, Carolina B G Teles, Andreimar M Soares, Leonardo A Calderon
Snake venoms contain various proteins, especially phospholipases A2 (PLA2s), which present potential applications in diverse areas of health and medicine. In this study, a new basic PLA2 from Bothrops marajoensis with parasiticidal activity was purified and characterized biochemically and biologically. B. marajoensis venom was fractionated through cation exchange followed by reverse phase chromatographies. The isolated toxin, BmajPLA2-II, was structurally characterized with MALDI-TOF (Matrix-assisted laser desorption/ionization-time of flight) mass spectrometry, sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), followed by two-dimensional electrophoresis, partial amino acid sequencing, an enzymatic activity assay, circular dichroism, and dynamic light scattering assays...
April 5, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28384414/alteration-of-high-density-lipoproteins-functionality-in-alzheimer-s-disease-patients
#9
Pamela Camponova, Aurélie Le Page, Hicham Berrougui, Julie Lamoureux, Graham Pawelec, Jacek Witkowski, Tamas Fulop, Abdelouahed Khalil
The aims of the present study were to determine whether High-Density Lipoproteins functionality (HDL)-mediated cholesterol efflux is altered in Alzheimer's disease (AD) and to investigate the role and effect of amyloid-beta (Aβ) in the regulation of the anti-atherogenic activity of HDL. Eighty-seven elderly subjects were recruited, of whom 27 were healthy, 27 had mild cognitive impairment (MCI), and 33 had mild Alzheimer's disease (mAD). Our results showed that total cholesterol levels are negatively correlated with the Mini Mental State Examination (MMSE) score (r = -0...
April 6, 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28380332/partial-characterization-and-immobilization-in-cnbr-activated-sepharose-of-a-native-lectin-from-platypodium-elegans-seeds-pela-and-comparative-study-of-edematogenic-effect-with-the-recombinant-form
#10
David Alencar Araripe, Vanir Reis Pinto-Junior, Antonio Hadson Bastos Neco, Mayara Queiroz Santiago, Vinicius Jose Silva Osterne, Alana Freitas Pires, Claudia Figueiredo Lossio, Maria Gleiciane Queiroz Martins, Jorge Luiz Almeida Correia, Raquel Guimaraes Benevides, Rodrigo Bainy Leal, Ana Maria Sampaio Assreuy, Kyria Santiago Nascimento, Benildo Sousa Cavada
The lectin from Platypodium elegans seeds (PELa) was purified by affinity chromatography in a mannose-agarose column. The lectin agglutinated rabbit erythrocytes and the agglutinating effect was inhibited by previous incubation with the glycoprotein fetuin, along with N-acetyl-d-glucosamine, D-mannose and its derivatives. The lectin maintained complete activity in temperatures ranging from 40 to 60°C and pH values ranging from 9 to 10. As a glycoprotein, PELa has a carbohydrate content of 2.2%, and its activity requires divalent cations such as Ca(2+) and Mn(2+)...
April 2, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28378260/effect-of-metformin-on-adult-hippocampal-neurogenesis-comparison-with-donepezil-and-links-to-cognition
#11
Sara Ahmed, Zahra Mahmood, Aneela Javed, Shoaib Naiyer Hashmi, Inga Zerr, Saima Zafar, Saadia Zahid
Recent studies have uncovered evidence suggesting that interference with hippocampal adult neurogenesis contributes to neurodegeneration in Alzheimer's disease (AD). Evidence supporting that AD is a metabolic disease with derangements in brain glucose utilization implies the use of anti-diabetics as an alternate therapeutic strategy. The present study drew comparison between the pro-neurogenic potential of metformin and donepezil in AlCl3-induced mouse model of neurodegeneration. Morris water maze task and subsequent immunohistochemical evaluation for NeuN was conducted...
April 4, 2017: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/28369665/immunoblotting-and-immunodetection
#12
Duojiao Ni, Peng Xu, Sean Gallagher
Immunoblotting (western blotting) is used to identify specific antigens recognized by polyclonal or monoclonal antibodies. This unit provides protocols for all steps, starting with solubilization of the protein samples, usually by means of SDS and reducing agents. Following solubilization, the material is separated by SDS-PAGE and the antigens are electrophoretically transferred to a membrane, a process that can be monitored by reversible staining with Ponceau S. The transferred proteins are bound to the surface of the membrane, providing access to immunodetection reagents...
April 3, 2017: Current Protocols in Protein Science
https://www.readbyqxmd.com/read/28367471/pulsed-dilution-method-for-the-recovery-of-aggregated-mouse-tnf-%C3%AE
#13
Merat Mahmoodi, Maryam Ghodsi, Malihe Moghadam, Mojtaba Sankian
BACKGROUND: The expression of mouse tumor necrosis factor alpha (TNF-α) in Escherichia coli is a favorable way to get high yield of protein; however, the formation of cytoplasmic inclusion bodies, which is the consequence of insoluble accumulated proteins, is a major obstacle in this system. To overcome this obstacle, we used a pulsed dilution method to convert the product to its native conformation. METHODS: Reducing agent and guanidine hydrochloride were used to solubilize inclusion bodies formed after TNF-(α) expression...
April 2017: Reports of Biochemistry & Molecular Biology
https://www.readbyqxmd.com/read/28351895/magnetic-poly-2-hydroxyethyl-methacrylate-microspheres-for-affinity-purification-of-antibodies-for-early-diagnosis-of-multiple-sclerosis-patients
#14
Daniel Horak, Helena Hlidkova, Yurii Kit, Rostyslav Stoika, Volodymyr Antonyuk, Severyn Myronovsky
The aim of this work is to develop new magnetic polymer microspheres with functional groups available for easy protein and antibody binding. Monodisperse macroporous poly(2-hydroxyethyl methacrylate) (PHEMA-COOH) microspheres ca. 4 µm in diameter and containing ~ 1 mmol COOH/g were synthesized by multistep swelling polymerization of 2-hydroxyethyl methacrylate (HEMA), ethylene dimethacrylate (EDMA), and [(methoxycarbonyl)methoxy]ethyl methacrylate (MCMEMA), which was followed by MCMEMA hydrolysis. The microspheres were rendered magnetic by precipitation of iron oxide inside the pores, which made them easily separable in a magnetic field...
March 28, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28350826/expression-purification-of-metallothionein-genes-from-freshwater-crab-sinopotamon-yangtsekiense-and-development-of-an-anti-metallothionein-elisa
#15
Jian Yang, Hui Sun, Hao Zhang, Hui Zhou
Using the phoA-fusion technology, the recombinant metallothionein (MT) from freshwater crab (Sinopotamon yangtsekiense) has been successfully produced in Escherichia coli. MT purified from the bacterial suspension showed one polypeptide with a molecular weight of 7 kDa by tricine-sodium dodecyl sulfate-polyacrylamide gel electrophoresis (Tricine-SDS-PAGE). Western-blotting confirmed the polypeptides had a specific reactivity with mouse polyclonal MT anti-serum. Based on the purified MT and MT anti-serum, the reaction parameters for an enzyme-linked immunosorbent assay (ELISA) were developed...
2017: PloS One
https://www.readbyqxmd.com/read/28349353/management-of-chronic-obstructive-pulmonary-disease-in-patients-with-cardiovascular-diseases
#16
Mario Cazzola, Luigino Calzetta, Barbara Rinaldi, Clive Page, Giuseppe Rosano, Paola Rogliani, Maria Gabriella Matera
Chronic obstructive pulmonary disease (COPD) and cardiovascular diseases often coexist. The mechanistic links between these two diseases are complex, multifactorial and not entirely understood, but they can influence the therapeutic approach. Therapy can be primarily directed towards treating the respiratory symptoms and reducing lung inflammation. Smoking cessation, bronchodilators and inhaled corticosteroids are central to this therapeutic approach. The underlying pathophysiological mechanisms that are responsible for the increased cardiovascular risk in COPD remain unclear, but might include arterial stiffness, inflammation and endothelial dysfunction as a consequence of systemic exposure to chemicals in cigarette smoke or airborne pollution...
March 28, 2017: Drugs
https://www.readbyqxmd.com/read/28339732/exploring-the-in-vivo-digestion-of-plant-proteins-in-broiler-chickens
#17
E Recoules, H Sabboh-Jourdan, A Narcy, M Lessire, G Harichaux, V Labas, M J Duclos, S Réhault-Godbert
The use of various protein sources (industry by-products, proteaginous) in poultry diets requires a greater understanding of protein digestion mechanisms. The aim of this study was to characterize the molecular actors required for protein digestion in broilers fed 4 different diets containing soybean meal, rapeseed meal, pea, or corn distiller's dried grain with solubles as the only protein source. The digesta of the digestive tract segments were collected and soluble proteins were analyzed by SDS-PAGE. SDS-PAGE analyses revealed 5 ubiquitous bands in digesta of all digestive tract segments regardless of the diet, whereas 3 bands were diet-specific...
February 23, 2017: Poultry Science
https://www.readbyqxmd.com/read/28325600/synthesis-and-anti-cancer-activities-of-new-sulfonamides-4-substituted-triazolyl-nucleosides
#18
Soukaina Alaoui, Maeva Dufies, Mohsine Driowya, Luc Demange, Khalid Bougrin, Guillaume Robert, Patrick Auberger, Gilles Pagès, Rachid Benhida
Nucleoside analogues are among the most known drugs commonly used in antiviral and anticancer chemotherapies. Among them, those featuring a five-membered ring nucleobase are of utmost interest such as the anti-cancer agent AICAR or the anti-viral drug ribavirin. Despite its low activity in vitro in different cell lines, AICAR is under clinical development for several pathologies, thanks to its original mode of action. Indeed, AICAR induced autophagy cell death and is able, following this mechanism, to circumvent resistance to apoptotic drugs including kinase inhibitors currently on the market...
May 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28323242/investigation-of-the-indigenous-fungal-community-populating-barley-grains-secretomes-and-xylanolytic-potential
#19
Abida Sultan, Jens C Frisvad, Birgit Andersen, Birte Svensson, Christine Finnie
The indigenous fungal species populating cereal grains produce numerous plant cell wall-degrading enzymes including xylanases, which could play important role in plant-pathogen interactions and in adaptation of the fungi to varying carbon sources. To gain more insight into the grain surface-associated enzyme activity, members of the populating fungal community were isolated, and their secretomes and xylanolytic activities assessed. Twenty-seven different fungal species were isolated from grains of six barley cultivars over different harvest years and growing sites...
March 18, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28317175/occupational-respiratory-allergy-in-peach-crop-workers
#20
Remedios Pérez-Calderón, M Ángeles Gonzalo-Garijo, Francisco José Rodríguez-Velasco, Silvia Sánchez-Vega, Borja Bartolomé-Zavala
BACKGROUND: Occupational respiratory diseases in workers of peach tree crops have been reported punctually and have been associated with sensitization to proteins present in both pollen and leaf tree. We report the study of 37 workers with respiratory symptoms related to occupational exposure to peach trees. METHODS: Prick tests and specific IgE determinations were performed with extracts from leaves and branches of peach tree. Immunodetection in leaf extract was realized by SDS-PAGE-immunoblotting with patient sera and rabbit serum anti-Pru p 3...
March 20, 2017: Allergy
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