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https://www.readbyqxmd.com/read/28211267/efficient-and-selective-uptake-of-tco4-by-a-cationic-metal-organic-framework-material-with-open-ag-sites
#1
Daopeng Sheng, Lin Zhu, Chao Xu, Chengliang Xiao, Yanlong Wang, Yaxing Wang, Lanhua Chen, Juan Diwu, Jing Chen, Zhifang Chai, Thomas E Albrecht-Schmitt, Shuao Wang
99Tc is one of the most problematic radioisotopes in used nuclear fuel owing to its combined features of high fission yield, long half-life, and high environmental mobility. There are only a handful of functional materials that can remove TcO4- anion from aqueous solution and identifying for new, stable materials with high anion-exchange capacities, fast kinetics, and good selectivity remains a challenge. We report here an 8-fold interpenetrated three-dimensional cationic metal-organic framework material, SCU-100, which is assembled from a tetradentate neutral nitrogen-donor ligand and two-coordinate Ag+ cations as potential open metal sites...
February 17, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28177218/ultrasensitive-photoelectrochemical-biosensing-of-cell-surface-n-glycan-expression-based-on-the-enhancement-of-nanogold-assembled-mesoporous-silica-amplified-by-graphene-quantum-dots-and-hybridization-chain-reaction
#2
Shenguang Ge, Feifei Lan, Linlin Liang, Na Ren, Li Li, Haiyun Liu, Mei Yan, Jinghua Yu
An ultrasensitive photoelectrochemical (PEC) biosensor for N-glycan expression based on the enhancement of nanogold-assembled mesoporous silica nanoparticles (GMSNs) was fabricated, which also combined with multibranched hybridization chain reaction (mHCR) and graphene quantum dots (GQDs). In this work, the localized surface plasmon resonance, mHCR and GQDs-induced signal amplification strategies were integrated exquisitely and applied sufficiently. In the fabrication, after porous ZnO spheres immobilized on the Au nanorod-modified paper working electrode were sensitized by CdTe QDs, the GMSNs were assembled on the CdTe QDs...
February 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28167878/commercial-separation-systems-designed-for-preparation-of-platelet-rich-plasma-yield-differences-in-cellular-composition
#3
Ryan M Degen, Johnathan A Bernard, Kristin S Oliver, Joshua S Dines
BACKGROUND: The role of platelet-rich plasma (PRP) in the treatment of sport-related injuries is unclear, largely due to the heterogeneity of clinical results. This may relate to compositional differences in PRP from different separation systems. QUESTIONS/PURPOSES: This study aims to compare the composition of PRP produced with five different commercially available systems, focusing on cellular concentrations and pH. METHODS: Seven donors (41 ± 12 years) provided blood for PRP preparation using five systems (Arthrex Angel, Emcyte Genesis CS, Arteriocyte Magellan, Harvest SmartPrep, and Biomet GPS III)...
February 2017: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
https://www.readbyqxmd.com/read/28151033/graft-immunocomplex-capture-fluorescence-analysis-to-detect-donor-specific-antibodies-and-hla-antigen-complexes-in-the-allograft
#4
Tsukasa Nakamura, Hidetaka Ushigome, Kiyoko Watabe, Yui Imanishi, Koji Masuda, Takehisa Matsuyama, Shumpei Harada, Katsuhiro Koshino, Taku Iida, Shuji Nobori, Norio Yoshimura
BACKGROUND: Immunocomplex capture fluorescence analysis (ICFA) is an attractive method to detect donor-specific anti-HLA antibodies (DSA) and HLA antigen complexes. Currently, antibody-mediated rejection (AMR) due to DSA is usually diagnosed by C4d deposition and serological DSA detection. Conversely, there is a discrepancy between these findings frequently. Thereupon, our graft ICFA technique may contribute to establish the diagnosis of AMR. METHODS: Graft samples were obtained by a percutaneous needle biopsy...
February 2, 2017: Immunological Investigations
https://www.readbyqxmd.com/read/28138842/high-throughput-sequencing-of-the-major-histocompatibility-complex-following-targeted-sequence-capture
#5
Johannes Pröll, Carina Fischer, Gabriele Michelitsch, Martin Danzer, Norbert Niklas
The Human Major Histocompatibility Complex (MHC) is a highly polymorphic region full of immunoregulatory genes. The MHC codes for the human leukocyte antigens (HLA), proteins that present on the cellular surface and that are involved in self-non-self recognition. For matching donors and recipients for organ and stem-cell transplants it is important to know an individual's HLA haplotype determinable in this region. Now, as next-generation sequencing (NGS) platforms mature and become more and more accepted as a standard method, NGS applications have spread from research laboratories to the clinic, where they provide valid genetic insights...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28129302/evaluation-and-quality-assessment-of-prestripped-preloaded-descemet-membrane-endothelial-keratoplasty-grafts
#6
Khoa D Tran, Philip K Dye, Kelly Odell, Joshua Galloway, Christopher G Stoeger, Michael D Straiko, Mark A Terry
PURPOSE: To determine graft quality and feasibility of Descemet membrane endothelial keratoplasty (DMEK) grafts that are prestripped and preloaded into injectors by eye bank technicians before shipping to surgeons. METHODS: DMEK grafts (n = 31) were prepared from donor corneas and preloaded into Straiko Modified Jones tubes and set inside viewing chambers filled with 20 mL of Optisol-GS. Preloaded grafts were evaluated using specular microscopy and slit-lamp biomicroscopy...
January 26, 2017: Cornea
https://www.readbyqxmd.com/read/28120840/non-invasive-prenatal-diagnosis-of-spinal-muscular-atrophy-by-relative-haplotype-dosage
#7
Michael Parks, Samantha Court, Benjamin Bowns, Siobhan Cleary, Samuel Clokie, Julie Hewitt, Denise Williams, Trevor Cole, Fiona MacDonald, Mike Griffiths, Stephanie Allen
Although technically possible, few clinical laboratories across the world have implemented non-invasive prenatal diagnosis (NIPD) for selected single-gene disorders, mostly owing to the elevated costs incurred. Having previously proven that NIPD for X-linked disorders can be feasibly implemented in clinical practice, we have now developed a test for the NIPD of an autosomal-recessive disorder, spinal muscular atrophy (SMA). Cell-free DNA was extracted from maternal blood and prepared for massively parallel sequencing on an Illumina MiSeq by targeted capture enrichment of single-nucleotide polymorphisms across a 6 Mb genomic window on chromosome 5 containing the SMN1 gene...
January 25, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28112755/larger-core-size-has-superior-technical-and-analytical-accuracy-in-bladder-tissue-microarray
#8
Adel Rh Eskaros, Shanna A Arnold Egloff, Kelli L Boyd, Joyce E Richardson, M Eric Hyndman, Andries Zijlstra
The construction of tissue microarrays (TMAs) with cores from a large number of paraffin-embedded tissues (donors) into a single paraffin block (recipient) is an effective method of analyzing samples from many patient specimens simultaneously. For the TMA to be successful, the cores within it must capture the correct histologic areas from the donor blocks (technical accuracy) and maintain concordance with the tissue of origin (analytical accuracy). This can be particularly challenging for tissues with small histological features such as small islands of carcinoma in situ (CIS), thin layers of normal urothelial lining of the bladder, or cancers that exhibit intratumor heterogeneity...
January 23, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28104702/il-2-promotes-early-treg-reconstitution-after-allogeneic-hematopoietic-cell-transplantation
#9
Brian C Betts, Joseph Pidala, Jongphil Kim, Asmita Mishra, Taiga Nishihori, Lia Perez, Jose Leonel Ochoa-Bayona, Farhad Khimani, Kelly Walton, Ryan Bookout, Michael Nieder, Divis K Khaira, Marco Davila, Melissa Alsina, Teresa Field, Ernesto Ayala, Frederick L Locke, Marcie Riches, Mohamed Kharfan-Dabaja, Hugo Fernandez, Claudio Anasetti
Graft-versus-host disease remains a major cause of transplant-related mortality. Interleukin-2 plus sirolimus synergistically reduces acute graft-versus-host disease in rodents and promotes regulatory T-cells. This phase II trial tested the hypothesis that interleukin-2 would facilitate STAT5 phosphorylation in donor T-cells, expand regulatory T-cells, and ameliorate graft-versus-host disease. Between 4/16/2014-12/19/2015, 20 patients received interleukin-2 (200,000IU/m2 thrice weekly, days 0 to +90) with sirolimus (5-14ng/ml) and tacrolimus (3-7ng/ml) after HLA-matched related or unrelated allogeneic hematopoietic cell transplantation...
January 19, 2017: Haematologica
https://www.readbyqxmd.com/read/28091601/massively-parallel-digital-transcriptional-profiling-of-single-cells
#10
Grace X Y Zheng, Jessica M Terry, Phillip Belgrader, Paul Ryvkin, Zachary W Bent, Ryan Wilson, Solongo B Ziraldo, Tobias D Wheeler, Geoff P McDermott, Junjie Zhu, Mark T Gregory, Joe Shuga, Luz Montesclaros, Jason G Underwood, Donald A Masquelier, Stefanie Y Nishimura, Michael Schnall-Levin, Paul W Wyatt, Christopher M Hindson, Rajiv Bharadwaj, Alexander Wong, Kevin D Ness, Lan W Beppu, H Joachim Deeg, Christopher McFarland, Keith R Loeb, William J Valente, Nolan G Ericson, Emily A Stevens, Jerald P Radich, Tarjei S Mikkelsen, Benjamin J Hindson, Jason H Bielas
Characterizing the transcriptome of individual cells is fundamental to understanding complex biological systems. We describe a droplet-based system that enables 3' mRNA counting of tens of thousands of single cells per sample. Cell encapsulation, of up to 8 samples at a time, takes place in ∼6 min, with ∼50% cell capture efficiency. To demonstrate the system's technical performance, we collected transcriptome data from ∼250k single cells across 29 samples. We validated the sensitivity of the system and its ability to detect rare populations using cell lines and synthetic RNAs...
January 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28067040/large-pore-3d-cubic-mesoporous-kit-6-hybrid-bearing-a-hard-soft-donor-combined-ligand-for-enhancing-u-vi-capture-an-experimental-and-theoretical-investigation
#11
Li-Yong Yuan, Lin Zhu, Cheng-Liang Xiao, Qun-Yan Wu, Nan Zhang, Ji-Pan Yu, Zhi-Fang Chai, Wei-Qun Shi
A preorganized tetradentate phenanthrolineamide (DAPhen) ligand with hard and soft donors combined in the same molecule has been found to possess high extraction ability toward actinides over lanthanides from acidic aqueous solution in our previous work. Herein we grafted phenanthrolineamide groups onto a large-pore three-dimensional cubic silica support by the reaction of DAPhen siloxane with KIT-6 substrate to prepare a novel uranium-selective sorbent, KIT-6-DAPhen. The as-synthesized sorbent was well-characterized by scanning electron microscopy, high-resolution transmission electron microscopy, N2 adsorption/desorption, X-ray diffraction, FT-IR, (13)C cross-polarization magic-angle spinning NMR, and TGA techniques, which confirmed the consummation of the functionalization...
February 1, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28065599/homology-requirements-and-competition-between-gene-conversion-and-break-induced-replication-during-double-strand-break-repair
#12
Anuja Mehta, Annette Beach, James E Haber
Saccharomyces cerevisiae mating-type switching is initiated by a double-strand break (DSB) at MATa, leaving one cut end perfectly homologous to the HMLα donor, while the second end must be processed to remove a non-homologous tail before completing repair by gene conversion (GC). When homology at the matched end is ≤150 bp, efficient repair depends on the recombination enhancer, which tethers HMLα near the DSB. Thus, homology shorter than an apparent minimum efficient processing segment can be rescued by tethering the donor near the break...
February 2, 2017: Molecular Cell
https://www.readbyqxmd.com/read/28063388/nanostructured-biosensor-for-detecting-glucose-in-tear-by-applying-fluorescence-resonance-energy-transfer-quenching-mechanism
#13
Longyi Chen, Wai Hei Tse, Yi Chen, Matthew W McDonald, James Melling, Jin Zhang
In this paper, a nanostructured biosensor is developed to detect glucose in tear by using fluorescence resonance energy transfer (FRET) quenching mechanism. The designed FRET pair, including the donor, CdSe/ZnS quantum dots (QDs), and the acceptor, dextran-binding malachite green (MG-dextran), was conjugated to concanavalin A (Con A), an enzyme with specific affinity to glucose. In the presence of glucose, the quenched emission of QDs through the FRET mechanism is restored by displacing the dextran from Con A...
December 23, 2016: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28057026/advances-in-rare-cell-isolation-an-optimization-and-evaluation-study
#14
Stefan Schreier, Piamsiri Sawaisorn, Rachanee Udomsangpetch, Wannapong Triampo
BACKGROUND: Rare nucleated CD45 negative cells in peripheral blood may be malignant such as circulating tumor cells. Untouched isolation thereof by depletion of normal is favored yet still technological challenging. We optimized and evaluated a novel magnetic bead-based negative selection approach for enhanced enrichment of rare peripheral blood nucleated CD45 negative cells and investigated the problem of rare cell contamination during phlebotomy. METHODS: Firstly, the performance of the magnetic cell separation system was assessed using leukocytes and cultivated fibroblast cells in regard to depletion efficiency and the loss of cells of interest...
January 5, 2017: Journal of Translational Medicine
https://www.readbyqxmd.com/read/28045905/human-leukocytes-kill-brugia-malayi-microfilariae-independently-of-dna-based-extracellular-trap-release
#15
Ciaran J McCoy, Barbara J Reaves, Steeve Giguère, Ruby Coates, Balázs Rada, Adrian J Wolstenholme
BACKGROUND: Wuchereria bancrofti, Brugia malayi and Brugia timori infect over 100 million people worldwide and are the causative agents of lymphatic filariasis. Some parasite carriers are amicrofilaremic whilst others facilitate mosquito-based disease transmission through blood-circulating microfilariae (Mf). Recent findings, obtained largely from animal model systems, suggest that polymorphonuclear leukocytes (PMNs) contribute to parasitic nematode-directed type 2 immune responses. When exposed to certain pathogens PMNs release extracellular traps (NETs) in the form of chromatin loaded with various antimicrobial molecules and proteases...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28034960/elevated-dna-oxidation-and-dna-repair-enzyme-expression-in-brain-white-matter-in-major-depressive-disorder
#16
Attila Szebeni, Katalin Szebeni, Timothy P DiPeri, Luke A Johnson, Craig A Stockmeier, Jessica D Crawford, Michelle J Chandley, Liza J Hernandez, Katherine C Burgess, Russell W Brown, Gregory A Ordway
BACKGROUND: Pathology of white matter in brains of patients with major depressive disorder (MDD) is well-documented, but the cellular and molecular basis of this pathology are poorly understood. METHODS: Levels of DNA oxidation and gene expression of DNA damage repair enzymes were measured in Brodmann area 10 (BA10) and/or amygdala (uncinate fasciculus) white matter tissue from brains of MDD (n=10) and psychiatrically normal control donors (n=13). DNA oxidation was also measured in BA10 white matter of schizophrenia donors (n=10) and in prefrontal cortical white matter from control rats (n=8) and rats with repeated stress-induced anhedonia (n=8)...
December 29, 2016: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28003942/clinical-usage-and-economic-effectiveness-of-a-recently-developed-epidermal-autograft-harvesting-system-in-13-chronic-wound-patients-in-a-university-based-wound-center
#17
Angela Hulsey, Paul Linneman, Jeff Litt
INTRODUCTION:  Chronic wounds are a significant healthcare problem in the United States. Their costs approach 25 billion dollars in the United States. Current wound-care treatments of local wound care, moist dressings, and source control, while necessary for wound healing, are frequently not enough to ensure complete wound closure. The current surgical technique of split-thickness skin grafting is an operative procedure, painful, time-consuming, and leaves significant donor site wounds...
November 14, 2016: Curēus
https://www.readbyqxmd.com/read/28003547/detection-of-prions-in-the-plasma-of-presymptomatic-and-symptomatic-patients-with-variant-creutzfeldt-jakob-disease
#18
Daisy Bougard, Jean-Philippe Brandel, Maxime Bélondrade, Vincent Béringue, Christiane Segarra, Hervé Fleury, Jean-Louis Laplanche, Charly Mayran, Simon Nicot, Alison Green, Arlette Welaratne, David Narbey, Chantal Fournier-Wirth, Richard Knight, Robert Will, Pierre Tiberghien, Stéphane Haïk, Joliette Coste
Variant Creutzfeldt-Jakob disease (vCJD) is a human prion disease resulting from the consumption of meat products contaminated by the agent causing bovine spongiform encephalopathy. Evidence supporting the presence of a population of silent carriers that can potentially transmit the disease through blood transfusion is increasing. The development of a blood-screening assay for both symptomatic vCJD patients and asymptomatic carriers is urgently required. We show that a diagnostic assay combining plasminogen-bead capture and protein misfolding cyclic amplification (PMCA) technologies consistently detected minute amounts of abnormal prion protein from French and British vCJD cases in the required femtomolar range...
December 21, 2016: Science Translational Medicine
https://www.readbyqxmd.com/read/28002483/physical-characteristics-of-a-citrullinated-pro-filaggrin-epitope-recognized-by-anti-citrullinated-protein-antibodies-in-rheumatoid-arthritis-sera
#19
Nicole Hartwig Trier, Bettina Eide Holm, Ole Slot, Henning Locht, Hanne Lindegaard, Anders Svendsen, Gunnar Houen
Rheumatoid arthritis (RA) is an autoimmune disease of complex etiology. A characteristic feature of a subset of RA is the presence of anti-citrullinated protein antibodies (ACPA), which correlate with a progressive disease course. In this study, we employed streptavidin capture enzyme-linked immunosorbent assay to analyze ACPA reactivity. Using the pro-filaggrin peptide HQCHQEST-Cit-GRSRGRCGRSGS, as template, we analyzed the reactivity of RA sera and healthy donor sera to various peptides in order to determine the physical characteristics of the citrullinated pro-filaggrin epitope and to examine whether biotin labelling influence antibody recognition...
2016: PloS One
https://www.readbyqxmd.com/read/27993881/flow-cytometric-panel-reactive-antibody-results-and-the-ability-to-find-transfusion-compatible-platelets-after-antibody-desensitization-for-allogeneic-bone-marrow-transplant
#20
Eric R Rosenbaum, Soumya Pandey, Terry O Harville, Gina A Drobena, Michele Cottler-Fox
BACKGROUND: Panel reactive antibody (PRA) reduction protocols are used to decrease anti-HLA antibodies with concomitant PRA monitoring as a measure of successful treatment prior to organ and haploidentical blood and marrow transplant (BMT). We hypothesized that the more sensitive flow cytometry (FC) based assays for PRA [FlowPRA(®) and Luminex(®) based Single Antigen Bead (SAB)] would also correlate with the ability to find compatible platelets for allosensitized recipients. METHODS: A female patient with myelodysplastic syndrome and a high HLA class I PRA [>90% PRA and cPRA by complement-dependent cytotoxicity (CDC) assay and Flow PRA] required allogeneic BMT...
December 2016: Annals of Clinical and Laboratory Science
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