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https://www.readbyqxmd.com/read/28431414/intratracheal-instillation-of-neutrophils-rescues-bacterial-overgrowth-initiated-by-trauma-damage-associated-molecular-patterns
#1
Kiyoshi Itagaki, Ingred Riça, Jing Zhang, Dave Gallo, Melissa DePrato, Leo E Otterbein, Carl J Hauser
BACKGROUND: Nosocomial pneumonias are common in trauma patients and so interventions to prevent and treat nosocomial pneumonia may improve outcomes. Our prior work strongly suggests that tissue injury predisposes to infections like nosocomial pneumonia because mitochondrial debris originating from injured cells contains damage-associated molecular patterns that can reduce neutrophil (PMN) migration into the airway and diminish PMN function in response to bacterial inoculation of the airway...
May 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28427685/fe3o4-hydroxyapatite-graphene-quantum-dots-as-a-novel-nano-sorbent-for-preconcentration-of-copper-residue-in-thai-food-ingredients-optimization-of-ultrasound-assisted-magnetic-solid-phase-extraction
#2
Phitchan Sricharoen, Nunticha Limchoowong, Yonrapach Areerob, Prawit Nuengmatcha, Suchila Techawongstien, Saksit Chanthai
Fe3O4/hydroxyapatite/graphene quantum dots (Fe3O4/HAP/GQDs) nanocomposite was synthesized and used as a novel magnetic adsorbent. This nanocomposite was characterized using scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray spectroscopy, and magnetization property. The Fe3O4/HAP/GQDs was applied to pre-concentrate copper residues in Thai food ingredients (so-called "Tom Yum Kung") prior to determination by inductively coupled plasma-atomic emission spectrometry...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28427668/synthesis-of-hydroxyapatite-nanorods-for-application-in-water-defluoridation-and-optimization-of-process-variables-advantage-of-ultrasonication-with-precipitation-method-over-conventional-method
#3
Dhiraj Mehta, Poonam Mondal, Virendra Kumar Saharan, Suja George
This research work presents the synthesis of hydroxyapatite (Hap) nanorods for defluoridation of drinking water by using both conventional (CM) and ultrasonication with precipitation (USPM) methods. Calcium nitrate was reacted with potassium phosphate in presence of ammonia for controlled pH to synthesize Hap nanorods, which was characterized using FTIR, XRD, SEM, TG-DTA, and TEM/EDS for determining its phase composition, structural and thermal decomposition behavior. When USPM method was used for synthesis, the yield of the Hap nanorods was improved from 83...
July 2017: Ultrasonics Sonochemistry
https://www.readbyqxmd.com/read/28425470/graphene-oxide-as-an-interface-phase-between-polyetheretherketone-and-hydroxyapatite-for-tissue-engineering-scaffolds
#4
Shuping Peng, Pei Feng, Ping Wu, Wei Huang, Youwen Yang, Wang Guo, Chengde Gao, Cijun Shuai
The poor bonding strength between biopolymer and bioceramic has remained an unsolved issue. In this study, graphene oxide (GO) was introduced as an interface phase to improve the interfacial bonding between polyetheretherketone (PEEK) and hydroxyapatite (HAP) for tissue engineering scaffolds. On the one hand, the conjugated structure of GO could form strong π-π stacking interaction with the benzene rings in PEEK. On the other hand, GO with a negatively charge resulting from oxygen functional groups could adsorb the positively charged calcium atoms (C sites) of HAP...
April 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424902/physical-and-psychosocial-aspects-of-adolescent-and-young-adults-after-allogeneic-hematopoietic-stem-cell-transplantation-results-from-a-prospective-multicenter-trial
#5
Kristin Pulewka, Daniel Wolff, Philipp Y Herzberg, Hildegard Greinix, Pia Heussner, Friederike H A Mumm, Stephanie von Harsdorf, Kathrin Rieger, Philipp Hemmati, Andreas Hochhaus, Inken Hilgendorf
PURPOSE: Allogeneic hematopoietic stem-cell transplantation (alloHSCT) is physically and psychosocially demanding. Among transplant recipients, adolescent and young adults (AYA) represent a special group, as disease occurs early in life, resulting in the prospect of long survival time and high burden of alloHSCT sequelae. However, data focusing on AYA undergoing alloHSCT are rare. METHODS: Data resulting from a prospective multicenter trial initially focusing on graft-versus-host disease (GvHD) after alloHSCT were reused to analyse the differences between AYA and elderly patients...
April 19, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28423864/adsorption-of-uranyl-ions-at-the-nano-hydroxyapatite-and-its-modification
#6
Ewa Skwarek, Agnieszka Gładysz-Płaska, Yuliia Bolbukh
Nano-hydroxyapatite and its modification, hydroxyapatite with the excess of phosphorus (P-HAP) and hydroxyapatite with the carbon ions built into the structure (C-HAP), were prepared by the wet method. They were studied by means of XRD, accelerated surface area and porosimetry (ASAP), and SEM. The size of crystallites computed using the Scherrer method was nano-hydroxyapatite (HAP) = 20 nm; P-HAP-impossible to determine; C-HAP = 22 nm; nano-HAP/U(VI) = 13.7 nm; P-HAP/U(VI)-impossible to determine, C-HAP/U(VI) = 11 nm...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28423594/the-hypoxia-activated-prodrug-evofosfamide-in-combination-with-multiple-regimens-of-radiotherapy
#7
Katarzyna J Nytko, Ivo Grgic, Sabine Bender, Janosch Ott, Matthias Guckenberger, Oliver Riesterer, Martin Pruschy
The promising treatment combination of ionizing radiation (IR) with a hypoxia-activated prodrug (HAP) is based on biological cooperation. Here we investigated the hypoxia-activated prodrug evofosfamide in combination with different treatment regimens of IR against lung A549- and head&neck UT-SCC-14-derived tumor xenografts. DNA damage-related endpoints and clonogenic cell survival of A549 and UT-SCC-14 carcinoma cells were probed under normoxia and hypoxia.Evofosfamide (TH-302) induced DNA-damage and a dose-dependent antiproliferative response in A549 cells on cellular pretreatment under hypoxia, and supra-additively reduced clonogenic survival in combination with IR...
April 4, 2017: Oncotarget
https://www.readbyqxmd.com/read/28415537/potassium-doped-mesoporous-bioactive-glass-synthesis-characterization-and-evaluation-of-biomedical-properties
#8
Muhammad Shoaib, Aamer Saeed, Javeed Akhtar, Muhammad Saif Ur Rahman, Aman Ullah, Klaus Jurkschat, Muhammad Moazzam Naseer
A bifunctional mesoporous bioactive glass (MBG) with composition (49SiO2·20CaO·20Na2O·7K2O·4P2O5 mol%) was synthesized by a facile sol-gel method, using polyethylene glycol (PEG 6000) as a soft template. The structure, morphology (spherical with approximate size 1μm) and composition of MBG were determined by fourier transform infrared spectroscopy, the scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX), respectively. The surface area (189.53m(2)g(-1) with the pore size of 21nm) of MBG was measured by Brunauer-Emmett-Teller (BET) and Barrett-Joyner-Halenda (BJH) analysis...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415517/fabrication-of-novel-biodegradable-porous-bone-scaffolds-based-on-amphiphilic-hydroxyapatite-nanorods
#9
Xiaoyan Zheng, Junfeng Hui, Hui Li, Chenhui Zhu, Xiufu Hua, Haixia Ma, Daidi Fan
This paper describes a new synthetic strategy and biological application for novel amphiphilic hydroxyapatite (HAp) nanorods. The prepared HAp nanorods were able to be dispersed in water, ethyl alcohol and cyclohexane. The co-anchoring of the multidentate ligands of PEG 20000 and hydrophobic oleic acid (OA) on the rods' surfaces endowed them with excellent amphibious properties. Utilizing amphiphilic HAp nanorods with excellent biocompatibility as the inorganic phase, human-like collagen (HLC) as the organic phase and natural genipin as the cross-linker, optimal HLC/HAp porous scaffolds (HLC: HAp=1:4, w/w) were fabricated...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28415420/in-vitro-cell-adhesion-and-proliferation-of-adipose-derived-stem-cell-on-hydroxyapatite-composite-surfaces
#10
Praneetha Pulyala, Akshay Singh, Marcela Ferreira Dias-Netipanyj, Sheron Compos Cogo, Luciane S Santos, Paulo Soares, Vasanth Gopal, V Suganthan, Geetha Manivasagam, Ketul C Popat
The goal of this work was to enhance the mechanical strength and fracture toughness of brittle hydroxyapatite (HAP) by reinforcing it with nanocomposites such as graphene oxide (GO), carbon nanotubes (CNT) and Titania. The goal was also to evaluate the cytotoxicity and the cellular adhesion/proliferation of these composites. The composites were characterized for their crystallinity, functionality, morphology and mechanical properties. Altering the composition by adding 1wt% GO and CNT significantly altered the wettability, hardness and roughness...
June 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28411451/anisotropic-tough-double-network-hydrogel-from-fish-collagen-and-its-spontaneous-in%C3%A2-vivo-bonding-to-bone
#11
Md Tariful Islam Mredha, Nobuto Kitamura, Takayuki Nonoyama, Susumu Wada, Keiko Goto, Xi Zhang, Tasuku Nakajima, Takayuki Kurokawa, Yasuaki Takagi, Kazunori Yasuda, Jian Ping Gong
Soft supporting tissues in the human body, such as cartilages and ligaments, are tough materials and firmly fixed to bones. These soft tissues, once injured, cannot regenerate spontaneously invivo. Developing tough and biocompatible hydrogels as artificial soft supporting tissues would substantially improve outcomes after soft tissue injury. Collagen is the main rigid component in soft connective tissues which is organized in various hierarchical arrays. We have successfully developed a novel class of collagen fibril-based tough hydrogels based on the double network (DN) concept using swim bladder collagen (SBC) extracted from Bester sturgeon fish...
April 5, 2017: Biomaterials
https://www.readbyqxmd.com/read/28406141/role-of-slow-release-nanocomposite-fertilizers-on-nitrogen-and-phosphate-availability-in-soil
#12
Amanda S Giroto, Gelton G F Guimarães, Milene Foschini, Caue Ribeiro
Developing efficient crop fertilization practices has become more and more important due to the ever-increasing global demand for food production. One approach to improving the efficiency of phosphate and urea fertilization is to improve their interaction through nanocomposites that are able to control the release of urea and P in the soil. Nanocomposites were produced from urea (Ur) or extruded thermoplastic starch/urea (TPSUr) blends as a matrix in which hydroxyapatite particles (Hap) were dispersed at ratios 50% and 20% Hap...
April 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28401569/influences-on-viral-replication-and-sensitivity-to-gls4-a-hap-compound-of-naturally-occurring-t109-v124-mutations-in-hepatitis-b-virus-core-protein
#13
Jianghua Wang, Haiying Zhang, Yingjun Zhang, Dong Jiang, Jing Li, Siegfried Goldmann, Qingyun Ren, Ran Fei, Xueyan Wang, Lai Wei
Heteroaryldihydropyrimidine (HAP) compounds inhibit HBV replication by binding to a hydrophobic pocket at the interface between hepatitis B virus core protein (HBcAg) dimer, which interrupts capsid assembly by changing the kinetics and thermodynamics during this process. Structure biological studies have identified several amino acids in HBcAg crucial for compound binding. Here we investigated the polymorphisms of T109 and V124 amino acids in HBV sequences submitted to GenBank database. Naturally occurring T109 and V124 and/or possible compensatory mutations in neighbored amino acids were introduced into HBV-expressing plasmids...
April 12, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28400774/elite-haplotypes-of-a-protein-kinase-gene-tasnrk2-3-associated-with-important-agronomic-traits-in-common-wheat
#14
Lili Miao, Xinguo Mao, Jingyi Wang, Zicheng Liu, Bin Zhang, Weiyu Li, Xiaoping Chang, Matthew Reynolds, Zhenhua Wang, Ruilian Jing
Plant-specific protein kinase SnRK2s play crucial roles in response to various environmental stimuli. TaSnRK2.3, a SnRK2 member, was involved in the response to multiple abiotic stresses in wheat. To facilitate the use of TaSnRK2.3 in wheat breeding, the three genomic sequences of TaSnRK2.3, originating from the A, B, and D genomes of hexaploid wheat, were obtained. Sequence polymorphism assays showing 4 and 10 variations were detected at TaSnRK2.3-1A and at TaSnRK2.3-1B, respectively, yet no variation was identified at TaSnRK2...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28397771/structural-characterization-and-antifungal-studies-of-zinc-doped-hydroxyapatite-coatings
#15
Simona Liliana Iconaru, Alina Mihaela Prodan, Nicolas Buton, Daniela Predoi
The present study is focused on the synthesis, characterization and antifungal evaluation of zinc-doped hydroxyapatite (Zn:HAp) coatings. The Zn:HAp coatings were deposited on a pure Si (Zn:HAp_Si) and Ti (Zn:HAp_Ti) substrate by a sol-gel dip coating method using a zinc-doped hydroxyapatite nanogel. The nature of the crystal phase was determined by X-ray diffraction (XRD). The crystalline phase of the prepared Zn:HAp composite was assigned to hexagonal hydroxyapatite in the P63/m space group. The colloidal properties of the resulting Zn:HAp (xZn = 0...
April 9, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28389931/physicochemical-characterization-of-mineral-deposits-in-human-ligamenta-flava
#16
Sylwia Orzechowska, Andrzej Wróbel, Marcin Kozieł, Wiesław Łasocha, Eugeniusz Rokita
The aim of our study was the detailed characterization of calcium deposits in ligamenta flava. The use of microcomputed tomography allowed extending the routine medical investigations to characterize mineral grains in the microscopic scale. A possible connection between spinal stenosis and ligament mineralization was investigated. The studies were carried out on 24 surgically removed ligamentum flavum samples divided into control and stenosis groups. Physicochemical characterization of the inorganic material was performed using X-ray fluorescence, X-ray diffraction, and Fourier transform infrared spectroscopy...
April 7, 2017: Journal of Bone and Mineral Metabolism
https://www.readbyqxmd.com/read/28372295/comparison-of-msc-properties-in-two-different-hydrogels-impact-of-mechanical-properties
#17
Hao Yu, Ghislaine Cauchois, Nicolas Louvet, Yun Chen, Rachid Rahouadj, Céline Huselstein
Once articular cartilage is damaged, it has poor ability to heal. At present, alginate-based hydrogels have 3D-dimensional physical structures with great potential for applications in carilage tissue engineering. For osteochondral defect, it will be necessary to use stratified scaffold to mimic zonal organization of cartilage. This study aims to compare the characteristics of alginate (Alg)/hyaluronic acid (HA) hydrogels which will mimic cartilage with alginate (Alg)/hydroxyapatite (Hap) hydrogels which will mimic subchondral bone...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28371525/risk-factors-for-mortality-in-children-with-pneumonia-admitted-to-the-pediatric-intensive-care-unit
#18
Jia Wen Janine Cynthia Koh, Judith Ju-Ming Wong, Rehena Sultana, Petrina Poh Chen Wong, Yee Hui Mok, Jan Hau Lee
AIMS: To describe the epidemiology of children with severe pneumonia and identify risk factors for poor outcomes. METHODS: We conducted a retrospective study of children admitted to pediatric intensive care unit (PICU) from 2010 to 2014 with a diagnosis of pneumonia. Clinical microbiological, ventilation and other pertinent PICU data were collected. Primary outcome was PICU mortality. Univariate and multivariate logistic regression model were used to identify risk factors for mortality...
April 3, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28369192/telavancin-in-the-recent-hospital-acquired-and-ventilator-associated-pneumonia-hap-vap-2016-guideline
#19
Ali Hassoun, Bruce Friedman, Louis D Saravolatz
No abstract text is available yet for this article.
March 24, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28367288/value-of-procalcitonin-as-a-biomarker-for-postoperative-hospital-acquired-pneumonia-after-abdominal-surgery
#20
Mohamed M Abu Elyazed, Maysaa El Sayed Zaki
BACKGROUND: Hospital-acquired pneumonia (HAP) is a common complication after abdominal surgery. The aim of this study was to evaluate the role of procalcitonin (PCT) and C-reactive protein (CRP) as early biomarkers for the diagnosis of postoperative HAP after abdominal surgery. METHODS: This study was conducted on 100 patients undergoing abdominal surgery. White blood cell counts, highest body temperature, and serum levels of CRP and PCT were recorded preoperatively and daily postoperatively until postoperative day (POD) 5...
April 2017: Korean Journal of Anesthesiology
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