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https://www.readbyqxmd.com/read/29786727/rational-design-of-multi-functional-gold-nanoparticles-with-controlled-biomolecule-adsorption-a-multi-method-approach-for-in-depth-characterization
#1
Isaac Ojea-Jiménez, Robin Capomaccio, Inês Osório, Dora Mehn, Giacomo Ceccone, Rohanah Hussain, Giuliano Siligardi, Pascal Colpo, François Rossi, Douglas Gilliland, Luigi Calzolai
Multi-functionalized nanoparticles are of great interest in biotechnology and biomedicine, especially for diagnostic and therapeutic purposes. However, at the moment the characterization of complex, multi-functional nanoparticles is still challenging and this hampers the development of advanced nanomaterials for biological applications. In this work, we have designed a model system consisting of gold nanoparticles functionalized with two differentially-terminated poly(ethylene oxide) ligands, providing both "stealth" properties and protein-binding capabilities to the nanoparticles...
May 22, 2018: Nanoscale
https://www.readbyqxmd.com/read/29786712/cocrystals-of-a-1-2-4-thiadiazole-based-potent-neuroprotector-with-gallic-acid-solubility-thermodynamic-stability-relationships-and-formation-pathways
#2
Artem O Surov, Andrei V Churakov, Alexey N Proshin, Xia-Lin Dai, Tongbu Lu, German L Perlovich
Three distinct solid forms, namely anhydrous cocrystals with 2 : 1 and 1 : 1 drug/acid ratios ([TDZ : GA] (2 : 1), [TDZ : GA] (1 : 1)), and a hydrated one having 1 : 1 : 1 drug/acid/water stoichiometry ([TDZ : GA : H2O] (1 : 1 : 1)), have been formed by cocrystallization of the biologically active 1,2,4-thiadiazole derivative (TDZ) with gallic acid (GA). The thermodynamic stability relationships between the cocrystals were rationalized in terms of Gibbs energies of the formation reactions and further verified by performing a set of competitive and exchange mechanochemical reactions...
May 22, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29786608/microscopic-aspects-of-wetting-using-classical-density-functional-theory
#3
Peter Yatsyshin, Miguel A Duran-Olivencia, Serafim Kalliadasis
Wetting is a rather efficient mechanism for nucleation of a phase (typically liquid) on the interface
 between two other phases (typically solid and gas). In many experimentally
 accessible cases of wetting, the interplay between the substrate structure,
 and the fluid-fluid and fluid-substrate intermolecular interactions brings
 about an entire ``zoo" of possible fluid configurations, such as liquid
 films with a thickness of a few nanometers, liquid nanodrops and liquid
 bridges...
May 22, 2018: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29786414/uncovering-the-design-principle-of-amino-acid-derived-photoluminescent-bio-dots-with-tailored-made-structure-properties-and-application-for-cellular-bioimaging
#4
Hesheng Victor Xu, Xinting Zheng, Yanli Zhao, Yen Nee Tan
Natural amino acids possess side chains with different functional groups (R groups), which make them excellent precursors for programmable synthesis of biomolecule-derived nanodots (bio-dots) with desired properties. Herein, we reported the first systematic study to uncover the material design rules of bio-dots synthesis from 20 natural α-amino acids via a green hydrothermal approach. The as-synthesized amino acids bio-dots (AA-dots) are comprehensively characterised to establish a structure-properties relationship between the amino acid precursors and the corresponding photoluminescent properties of AA-dots...
May 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29786146/awareness-of-and-phobias-about-topical-corticosteroids-in-parents-of-infants-with-eczema-in-hangzhou-china
#5
Yunling Li, Ting Han, Wei Li, Yin Li, Xiaoxuan Guo, Lei Zheng
BACKGROUND/OBJECTIVES: Knowledge of and phobias about topical corticosteroids in parents of infants with eczema affect efficacy of eczema treatment. METHODS: We surveyed 300 parents of children with eczema using a questionnaire to investigate knowledge of and phobias about topical corticosteroids. RESULTS: Overall, 85.7% (n = 257) of children had used topical corticosteroids, with 12.8% (n = 33) of children having steroids applied for only 1-3 days per episode; 79...
May 22, 2018: Pediatric Dermatology
https://www.readbyqxmd.com/read/29785875/egfr-tkis-in-non-small-cell-lung-cancer-focus-on-clinical-pharmacology-and-mechanisms-of-resistance
#6
Stefano Fogli, Beatrice Polini, Marzia Del Re, Iacopo Petrini, Antonio Passaro, Stefania Crucitta, Eleonora Rofi, Romano Danesi
The clinical introduction of EGFR-TKIs within the oncologic armamentarium has changed the therapeutic landscape of non-small-cell lung cancer (NSCLC) creating widespread expectations both in patients and clinicians. However, several gaps in current understanding leave open important questions regarding the use of these drugs in clinical practice. For instance, there is uncertainty in regard to which EGFR-TKI should be given first in naive patients with EGFR-driven malignancies since different generations of drugs are available with different pharmacological profiles...
May 22, 2018: Pharmacogenomics
https://www.readbyqxmd.com/read/29785855/optimizing-protein-harvest-from-nasal-brushings-for-determining-local-allergy-responses
#7
Erin C Saricilar, Aneeza Hamizan, Raquel Alvarado, Janet Rimmer, William Sewell, Jessica Tatersall, Henry P Barham, Richard Harvey
Background Rhinitis is a highly prevalent yet often misdiagnosed condition. Patients who have local allergic rhinitis are regularly mislabeled as having a nonallergic etiology. Thus, a highly accurate, reproducible, and noninvasive assessment, which can be performed quickly and with minimal discomfort to the patient, is required. Objective The aim of this research was to identify the efficiency of various nasal brushes as tools for harvest and collection of epithelial proteins and its suitability for identification of rhinitis...
January 1, 2018: American Journal of Rhinology & Allergy
https://www.readbyqxmd.com/read/29785757/a-nursing-solution-to-primary-care-delivery-shortfall
#8
Michael Carter, Phillip Moore, Nina Sublette
Many countries project that they will have difficulty to meet their demand for primary care based on an inadequate supply of primary care doctors. There are many reasons for this, and they tend to vary by country. The policy options available to these countries are to increase the number of local primary care doctors, recruit doctors from other countries, ration primary care, shift more primary care to specialists, or authorize other disciplines to provide primary care. This article examines lessons learned in the United States over the past 50 years and proposes that expanding the use of nurse practitioners is the best solution when measured by feasibility, costs, ethics, and scope of the care delivered...
May 21, 2018: Nursing Inquiry
https://www.readbyqxmd.com/read/29785682/the-modified-memorial-symptom-assessment-scale-short-form-a-modified-response-format-and-rational-scoring-rules
#9
J L Sharp, K Gough, M C Pascoe, A Drosdowsky, V T Chang, P Schofield
PURPOSE: The Memorial Symptom Assessment Scale Short Form (MSAS-SF) is a widely used symptom assessment instrument. Patients who self-complete the MSAS-SF have difficulty following the two-part response format, resulting in incorrectly completed responses. We describe modifications to the response format to improve useability, and rational scoring rules for incorrectly completed items. METHODS: The modified MSAS-SF was completed by 311 women in our Peer and Nurse support Trial to Assist women in Gynaecological Oncology; the PeNTAGOn study...
May 21, 2018: Quality of Life Research
https://www.readbyqxmd.com/read/29785595/a-preliminary-investigation-on-water-quality-of-coalbed-natural-gas-produced-water-for-beneficial-uses-a-case-study-in-the-southern-qinshui-basin-north-china
#10
Zheng Zhang, Yong Qin
Coalbed natural gas (CBNG) is an important unconventional natural gas resource with large reserves in China and receives much attention these years. The CBNG production is accomplished by extracting large volumes of produced water from the aquifer. The CBNG-produced water is commonly managed by discharging into nearby disposal ponds in the Southern Qinshui Basin (SQB), which provides an opportunity for water source for nearby irrigation, livestock, wildlife, and human drinking water. However, utilization of this nontraditional water source in the SQB is hindered by limited knowledge of water quality, practically oxidation/reduction potential (OPR), electrical conductivity (EC), sodium adsorption ration (SAR), and trace element chemistry data...
May 21, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29785500/boosting-the-efficiency-of-site-saturation-mutagenesis-for-a-difficult-to-randomize-gene-by-a-two-step-pcr-strategy
#11
Aitao Li, Carlos G Acevedo-Rocha, Manfred T Reetz
Site-saturation mutagenesis (SSM) has been used in directed evolution of proteins for a long time. As a special form of saturation mutagenesis, it involves individual randomization at a given residue with formation of all 19 amino acids. To date, the most efficient embodiment of SSM is a one-step PCR-based approach using NNK codon degeneracy. However, in the case of difficult-to-randomize genes, SSM may not deliver all of the expected 19 mutants, which compels the user to invest further efforts by applying site-directed mutagenesis for the construction of the missing mutants...
May 21, 2018: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/29785088/insight-into-resistance-mechanism-of-anaplastic-lymphoma-kinase-to-alectinib-and-jh-viii-157-02-caused-by-g1202r-solvent-front-mutation
#12
Han Wang, Yao Wang, Wentao Guo, Bin Du, Xiaobing Huang, Riping Wu, Baoyu Yang, Xiaoyan Lin, Yilan Wu
Background: Mutated anaplastic lymphoma kinase (ALK) drives the development of advanced non-small cell lung cancer (NSCLC). Most reported small-molecule inhibitors targeting the ALK domain do not display good inhibition of the G1202R solvent front mutation. The solvent front mutation was assumed to hinder drug binding. However, a different fact could be uncovered by the simulations reported in this study through a structural analog of alectinib (JH-VIII-157-02), which demonstrated potent effects against the G1202R mutation...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29785087/transcriptomic-impacts-of-rumen-epithelium-induced-by-butyrate-infusion-in-dairy-cattle-in-dry-period
#13
Ransom L Baldwin, Robert W Li, Yankai Jia, Cong-Jun Li
The purpose of this study was to evaluate the effects of butyrate infusion on rumen epithelial transcriptome. Next-generation sequencing (NGS) and bioinformatics are used to accelerate our understanding of regulation in rumen epithelial transcriptome of cattle in the dry period induced by butyrate infusion at the level of the whole transcriptome. Butyrate, as an essential element of nutrients, is a histone deacetylase (HDAC) inhibitor that can alter histone acetylation and methylation, and plays a prominent role in regulating genomic activities influencing rumen nutrition utilization and function...
2018: Gene Regulation and Systems Biology
https://www.readbyqxmd.com/read/29785047/rationally-designed-aav2-and-aavrh8r-capsids-provide-improved-transduction-in-the-retina-and-brain
#14
Jennifer A Sullivan, Lisa M Stanek, Michael J Lukason, Jie Bu, Shayla R Osmond, Elizabeth A Barry, Catherine R O'Riordan, Lamya S Shihabuddin, Seng H Cheng, Abraham Scaria
The successful application of adeno-associated virus (AAV) gene delivery vectors as a therapeutic paradigm will require efficient gene delivery to the appropriate cells in affected organs. In this study, we utilized a rational design approach to introduce modifications to the AAV2 and AAVrh8R capsids and the resulting variants were evaluated for transduction activity in the retina and brain. The modifications disrupted either capsid/receptor binding or altered capsid surface charge. Specifically, we mutated AAV2 amino acids R585A and R588A, which are required for binding to its receptor, heparan sulfate proteoglycans, to generate a variant referred to as AAV2-HBKO...
May 22, 2018: Gene Therapy
https://www.readbyqxmd.com/read/29784881/structural-basis-for-adp-dependent-glucokinase-inhibition-by-8-bromo-substituted-adenosine-nucleotide
#15
Przemyslaw Grudnik, Marcin M Kaminski, Krzysztof P Rembacz, Katarzyna Kuska, Mariusz Madej, Jan Potempa, Maciej Dawidowski, Grzegorz Dubin
In higher eukaryotes, several ATP-utilizing enzymes known as hexokinases activate glucose in the glycolysis pathway by phosphorylation to glucose-6-phosphate. In contrast to canonical hexokinases which use ATP, ADP-dependent glucokinase (ADPGK) catalyzes non-canonical phosphorylation of glucose to glucose-6-phosphate using ADP as a phosphate donor. Initially discovered in Archaea, the human homolog of ADPGK was described only recently. ADPGK's involvement in modified bioenergetics of activated T cells has been postulated and elevated ADPGK expression has been reported in various cancer tissues...
May 21, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29784675/radiation-followed-by-ox40-stimulation-drives-local-and-abscopal-antitumor-effects-in-an-anti-pd1-resistant-lung-tumor-model
#16
Sharareh Niknam, Hampartsoum B Barsoumian, Jonathan E Schoenhals, Heather Jackson, Niranjan Yanamandra, Mauricio S Caetano, Ailin Li, Ahmed I Younes, Alexandra P Cadena, Taylor R Cushman, Joe Y Chang, Quynh Nguyen, Daniel R Gomez, Adi Diab, John V Heymach, Patrick Hwu, Maria Angelica Cortez, James W Welsh
PURPOSE: Radiation is used extensively to treat localized cancer, but improved understanding of its effects on the immune system have increased interest in its potential systemic (abscopal) effects, particularly in combination with checkpoint inhibitors such as anti-PD1. The majority of patients either do not respond or develop resistance to monotherapy over time. Here, we investigated the efficacy of OX40 (CD134) stimulation as an alternative immunotherapeutic approach in combination with radiotherapy (XRT) in a murine model of anti-PD1-resistant lung tumors...
May 21, 2018: Clinical Cancer Research: An Official Journal of the American Association for Cancer Research
https://www.readbyqxmd.com/read/29784335/gas-phase-complexation-of-%C3%AE-%C3%AE-cyclodextrin-with-amino-acids-studied-by-ion-mobility-mass-spectrometry-and-molecular-dynamics-simulations
#17
Yinjuan Chen, Zhicheng Zuo, Xinhua Dai, Peng Xiao, Xiang Fang, Xuefeng Wang, Wenning Wang, Chuan-Fan Ding
Cyclodextrins (CDs) are a class of macrocyclic molecules that have exhibited many promising applications in various fields. The knowledge of the complexation modes and recognition mechanisms of CDs with their guests are of paramount importance for rational design of more variants with controlled properties. Herein we investigated the binding conformations and the structural characteristics of α-/β-CD with three amino acids (AA, AA=Gly, L-Leu, L-Phe) in the gas phase by a combined experimental and computational approach...
August 15, 2018: Talanta
https://www.readbyqxmd.com/read/29784011/extremely-low-frequency-electromagnetic-fields-promote-mesenchymal-stem-cell-migration-by-increasing-intracellular-ca-2-and-activating-the-fak-rho-gtpases-signaling-pathways-in-vitro
#18
Yingchi Zhang, Jiyuan Yan, Haoran Xu, Yong Yang, Wenkai Li, Hua Wu, Chaoxu Liu
BACKGROUND: The ability of mesenchymal stem cells (MSCs) to migrate to the desired tissues or lesions is crucial for stem cell-based regenerative medicine and tissue engineering. Optimal therapeutics for promoting MSC migration are expected to become an effective means for tissue regeneration. Electromagnetic fields (EMF), as a noninvasive therapy, can cause a lot of biological changes in MSCs. However, whether EMF can promote MSC migration has not yet been reported. METHODS: We evaluated the effects of EMF on cell migration in human bone marrow-derived MSCs...
May 21, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29783937/enterococcus-gallinarum-meningitis-a-case-report-and-literature-review
#19
Bo Zhao, Mao Sheng Ye, Rui Zheng
BACKGROUND: As an opportunistic pathogen, E. gallinarum mainly leads to nosocomial infections, and it's multi-drug resistance has gained more and more attention. Central nervous system infections caused by E. gallinarum are rare, but have been reported more often in recent years. The previous cases were generally secondary to neurosurgery, especially ventriculoperitoneal shunts. In recent years, the cases largely occurred in patients with impaired immune function. The patient in our report may have had dual risk factors (immune impairment and an invasive surgical procedure)...
May 21, 2018: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29783865/flow-cytometry-based-epitope-binning-using-competitive-binding-profiles-for-the-characterization-of-monoclonal-antibodies-against-cellular-and-soluble-protein-targets
#20
Brian M Chan, Anita Badh, Kelly A Berry, Stephanie A Grauer, Chadwick T King
A key step in the therapeutic antibody drug discovery process is early identification of diverse candidate molecules. Information comparing antibody binding epitopes can be used to classify antibodies within a large panel, guiding rational lead molecule selection. We describe a novel epitope binning method utilizing high-throughput flow cytometry (HTFC) that leverages cellular barcoding or spectrally distinct beads to multiplex samples to characterize antibodies raised against cell membrane receptor or soluble protein targets...
May 1, 2018: SLAS Discovery
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