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https://www.readbyqxmd.com/read/28325033/user-intent-prediction-with-a-scaled-conjugate-gradient-trained-artificial-neural-network-for-lower-limb-amputees-using-a-powered-prosthesis
#1
Richard B Woodward, John A Spanias, Levi J Hargrove
Powered lower limb prostheses have the ability to provide greater mobility for amputee patients. Such prostheses often have pre-programmed modes which can allow activities such as climbing stairs and descending ramps, something which many amputees struggle with when using non-powered limbs. Previous literature has shown how pattern classification can allow seamless transitions between modes with a high accuracy and without any user interaction. Although accurate, training and testing each subject with their own dependent data is time consuming...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28325003/nanostructured-bioluminescence-quenching-sensor-for-detecting-glucose
#2
Longyan Chen, Longyi Chen, Jin Zhang
A new nanostructured biosensor by applying bioluminescent quenching technique is developed for detecting small molecules, e.g. glucose, at low concentration. It demonstrates the effect of glucose on the interaction between β-cyclodextrin (β-CD) conjugated luciferase and phenylboronic acid (PBA) conjugated gold nanoparticles (Au NPs).
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28324866/long-term-bioavailability-of-redox-nanoparticles-effectively-reduces-organ-dysfunctions-and-death-in-whole-body-irradiated-mice
#3
Chitho P Feliciano, Koji Tsuboi, Kenshi Suzuki, Hiroyuki Kimura, Yukio Nagasaki
Radioprotective agents have been developed to protect patients against the damaging and lethal effects of ionizing radiation. However, in addition to the intrinsic ability to target reactive oxygen species (ROS), the ability to retain a significant level of bioavailability is desirable in radioprotective agents because that would increase and prolong their radioprotective efficacy and improve its safety. Here, we report the development of a novel nanoparticle-based radioprotective agent with improved bioavailability, which suppressed the adverse effects typically associated with low-molecular-weight (LMW) antioxidants...
March 14, 2017: Biomaterials
https://www.readbyqxmd.com/read/28324723/specific-light-up-pullulan-based-nanoparticles-with-reduction-triggered-emission-and-activatable-photoactivity-for-the-imaging-and-photodynamic-killing-of-cancer-cells
#4
Jing Xia, Liuwei Zhang, Ming Qian, Yongming Bao, Jingyun Wang, Yachen Li
Activatable photosensitizers that can be activated by cancer-associated stimuli have drawn increasing attention for simultaneous fluorescence imaging and photodynamic ablation of cancer cells. Here, we developed a cancer-cell specific photosensitizer nano-delivery system by synthesizing protoporphyrin IX (PpIX)-conjugated pullulan (P) with reducible disulfide bonds. The amphiphilic P-s-s-PpIX conjugate self-assembled in aqueous condition to form core-shell structured nanoparticles (P-s-s-PpIX NPs) with average size of 166nm, showing reduction-controllable stability...
March 15, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28324209/molecular-cloning-structural-modeling-and-the-production-of-soluble-triple-mutated-diphtheria-toxoid-k51e-g52e-e148k-co-expressed-with-molecular-chaperones-in-recombinant-escherichia-coli
#5
Naphatsamon Uthailak, Pornpimol Mahamad, Pamorn Chittavanich, Somchai Yanarojana, Wassana Wijagkanalan, Jean Petre, Watanalai Panbangred
CRM197 is a diphtheria toxin (DT) mutant (G52E) which has been used as a carrier protein for conjugate vaccines. However, it still possesses cytotoxicity toward mammalian cells. The goal of this project was to produce a non-toxic and soluble CRM197EK through introduction of triple amino acid substitutions (K51E/G52E/E148K) in Escherichia coli. The expression of CRM197EKTrxHis was optimized and co-expressed with different molecular chaperones. The soluble CRM197EKTrxHis was produced at a high concentration (97...
March 21, 2017: Molecular Biotechnology
https://www.readbyqxmd.com/read/28324061/progesterone-protects-against-bpa-induced-arrhythmias-in-female-rat-cardiac-myocytes-via-rapid-signaling
#6
Jianyong Ma, Kui Hong, Hong-Sheng Wang
Bisphenol A (BPA) is an estrogenic endocrine disrupting chemical (EDC) that has a range of potential adverse health effects. Previously we showed that acute exposure to BPA promoted arrhythmias in female rat hearts through estrogen receptor rapid signaling. Progesterone (P4) and estrogen have antagonistic or complementary actions in a number of tissues and systems. In the current study, we examined the influence, and possible protective effect, of P4 on the rapid cardiac actions of BPA in female rat cardiac myocytes...
January 25, 2017: Endocrinology
https://www.readbyqxmd.com/read/28323564/differential-susceptibility-of-bighorn-sheep-ovis-canadensis-and-domestic-sheep-ovis-aries-neutrophils-to-mannheimia-haemolytica-leukotoxin-is-not-due-to-differential-expression-of-cell-surface-cd18
#7
Rohana P Dassanayake, Sudarvili Shanthalingam, Weiguo Liu, Eduardo Casas, Subramaniam Srikumaran
Bighorn sheep ( Ovis canadensis ) are more susceptible to pneumonia caused by Mannheimia haemolytica than are domestic sheep ( Ovis aries ). Leukotoxin produced by M. haemolytica is the principal virulence factor involved in pneumonia pathogenesis. Although leukotoxin is cytolytic to all subsets of ruminant leukocytes, neutrophils are the most susceptible subset. Bighorn sheep neutrophils are 4- to 8-fold more susceptible to leukotoxin-induced cytolysis than are domestic sheep neutrophils. We hypothesized that the higher susceptibility of bighorn sheep neutrophils, in comparison to domestic sheep neutrophils, is due to higher expression of CD18, the receptor for leukotoxin on leukocytes...
March 21, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28323416/one-pot-two-nanoprobe-assay-uncovers-targeted-glycoprotein-biosignature
#8
Mira Anne C Dela Rosa, Wei-Chun Chen, Yi-Ju Chen, Rofeamor P Obena, Chih-Hsiang Chang, Rey Y Capangpangan, Tung-Hung Su, Chi-Ling Chen, Pei-Jer Chen, Yu-Ju Chen
We report a one-pot two-nanoprobe approach coupled to mass spectrometry for simultaneous quantification and post-translational modification (PTM) profiling of targeted protein in biofluid. Using N-glycoprotein as model, the assay employs two nanoprobes, antibody-conjugated SiO2 nanoparticles and lectin-conjugated magnetic Fe3O4 nanoparticles, to achieve target glycoprotein isolation from biofluid and subsequent glycopeptide enrichment in a single tube. As demonstrated on α-fetoprotein (AFP), a serum biomarker for hepatocellular carcinoma (HCC), the assay has high purification specificity (20 glycopeptides) with 2-fold and 10-fold superior total glycopeptide intensity compared to non-one-pot method (9 glycopeptides) or without enrichment (6 glycopeptides), respectively...
March 21, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28319815/shape-dependent-enzyme-like-activity-of-co3o4-nanoparticles-and-their-conjugation-with-his-tagged-egfr-single-domain-antibody
#9
Wei Zhang, Jinlai Dong, Yang Wu, Peng Cao, Lina Song, Ming Ma, Ning Gu, Yu Zhang
In this study, Co3O4 nanopolyhedrons, nanocubes, nanoplates and nanorods were synthesized and characterized. Furthermore, the peroxidase- and catalase-like activities of these Co3O4 nanoparticles (NPs) were studied and influence of the exposed crystal planes was explored. According to their morphology and peroxidase-like activity, dimercaptosuccinic acid (DMSA) modified Co3O4 nanopolyhedrons synthesized via coprecipitation method (Co3O4 NHs) were selected as a proper candidate for the immunohistochemical (IHC) detection of epidermal growth factor receptor (EGFR) expression in non-small cell lung cancer (NSCLC) tissues...
February 28, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28319769/effects-of-different-cellulases-on-the-release-of-phenolic-acids-from-rice-straw-during-saccharification
#10
Yiyun Xue, Xiahui Wang, Xingxuan Chen, Jiajun Hu, Min-Tian Gao, Jixiang Li
Effects of different cellulases on the release of phenolic acids from rice straw during saccharification were investigated in this study. All cellulases tested increased the contents of phenolic acids during saccharification. However, few free phenolic acids were detected, as they were present in conjugated form after saccharification when the cellulases from Trichoderma reesei, Trichoderma viride and Aspergillus niger were used. On the other hand, phenolic acids were present in free form when the Acremonium cellulolyticus cellulase was used...
March 4, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28319404/encapsulation-of-an-ep67-conjugated-ctl-peptide-vaccine-in-nanoscale-biodegradable-particles-increases-the-efficacy-of-respiratory-immunization-and-affects-the-magnitude-and-memory-subsets-of-vaccine-generated-mucosal-and-systemic-cd8-t-cells-in-a-diameter
#11
Bala Vamsi Krishna Karuturi, Shailendra B Tallapaka, Pravin Yeapuri, Stephen M Curran, Sam D Sanderson, Joseph A Vetro
The diameter of biodegradable particles used to co-encapsulate immunostimulants and subunit vaccines affects the magnitude of memory CD8(+) T cells generated by systemic immunization. Possible effects on the magnitude of CD8(+) T cells generated by mucosal immunization or memory subsets that potentially correlate more strongly with protection against certain pathogens, however, are unknown. In this study, we conjugated our novel host-derived mucosal immunostimulant, EP67, to the protective MCMV CTL epitope, pp89, through a lysosomal protease-labile double arginine linker (pp89-RR-EP67) and encapsulated in PLGA 50:50 micro- or nanoparticles...
March 20, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28319383/molecular-docking-towards-panchromatic-dye-sensitizers-for-solar-cells-based-upon-tetraazulenylporphyrin-and-tetraanthracenylporphyrin
#12
Cai-Rong Zhang, Xing-Yu Li, Yu-Lin Shen, Youzhi Wu, Zi-Jiang Liu, Hongshan Chen
Novel dye sensitizers are highly expected in the development of dye-sensitized solar cells (DSSCs) since dye sensitizers can significantly affect the power conversion efficiency (PCE). Here, the molecular docking strategy is applied to design panchromatic dye sensitizers for DSSCs in order to improve light-harvesting efficiency covering the full solar spectrum. Considering the broad absorption bands of tetraanthracenylporphyrins (TAnPs) and tetraazuleneporphyrins (TAzPs), based upon porphyrin dye sensitizer YD2-o-C8, the panchromatic dye sensitizers coded as H2(TAnP)-α, H2(TAzP)-γ, H2(TAzP)-ε, and H2(TAzP)-δ are designed by the substitution of the porphyrin-ring in YD2-o-C8 with TAnPs and TAzPs moieties at different positions...
March 20, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28319382/time-resolved-spectroscopic-investigation-of-charge-trapping-in-carbon-nitrides-photocatalysts-for-hydrogen-generation
#13
Robert Godin, Yiou Wang, Martijn A Zwijnenburg, Junwang Tang, James R Durrant
Carbon nitride (g-C3N4) as a benchmark polymer photocatalyst is attracting significant research interest because of its visible light photocatalytic performance combined with good stability and facile synthesis. However, little is known about the fundamental photophysical processes of g-C3N4, which are key to explain and promote photoactivity. Using time-resolved absorption and photoluminescence spectroscopies, we have investigated the photophysics of a series of carbon nitrides on timescales ranging from femtoseconds to seconds...
March 20, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28319364/a-new-spin-on-antibody-drug-conjugates-trastuzumab-fulvestrant-colloidal-drug-aggregates-target-her2-positive-cells
#14
Ahil N Ganesh, Christopher Mclaughlin, Da Duan, Brian K Shoichet, Molly S Shoichet
While the formation of colloidal aggregates leads to artifacts in early drug discovery, their composition makes them attrac-tive as nanoparticle formulations for targeted drug delivery as the entire nanoparticle is composed of drug. The typical tran-sient stability of colloidal aggregates has inhibited exploiting this property. To overcome this limitation, we investigated a series of proteins to stabilize colloidal aggregates of the chemotherapeutic, fulvestrant, including: bovine serum albumin, a generic human immunoglobulin G, and trastuzumab, a therapeutic anti-human epidermal growth factor receptor 2 anti-body...
March 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28319051/tissue-specific-exosome-biomarkers-for-noninvasively-monitoring-immunologic-rejection-of-transplanted-tissue
#15
Prashanth Vallabhajosyula, Laxminarayana Korutla, Andreas Habertheuer, Ming Yu, Susan Rostami, Chao-Xing Yuan, Sanjana Reddy, Chengyang Liu, Varun Korutla, Brigitte Koeberlein, Jennifer Trofe-Clark, Michael R Rickels, Ali Naji
In transplantation, there is a critical need for noninvasive biomarker platforms for monitoring immunologic rejection. We hypothesized that transplanted tissues release donor-specific exosomes into recipient circulation and that the quantitation and profiling of donor intra-exosomal cargoes may constitute a biomarker platform for monitoring rejection. Here, we have tested this hypothesis in a human-into-mouse xenogeneic islet transplant model and validated the concept in clinical settings of islet and renal transplantation...
March 20, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28319028/optically-active-charge-transfer-in-hybrids-of-alq-sub-3-sub-nanoparticles-and-mos-sub-2-sub-monolayer
#16
Ganesh Ghimire, Krisnhna Dhakal, Guru Neupane, Seong Gi Jo, Hyun Kim, Changwon Seo, Young Lee, Jinsoo Joo, Jeongyong Kim
Organic/inorganic hybrid structures have been widely studied because of their enhanced physical and chemical properties. Monolayers of transition metal dichalcogenides (1L-TMDs) and organic nanoparticles can provide a hybridization configuration between zero- and two-dimensional systems with the advantages of convenient preparation and strong interface interaction. Here, we present such a hybrid system made by dispersing π-conjugated organic (tris(8-hydroxyquinoline)aluminum(III)) (Alq<sub>3</sub>) nanoparticles (NPs) on 1L-MoS<sub>2</sub>...
March 20, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28318879/evidences-for-salbutamol-metabolism-by-respiratory-and-liver-cell-lines
#17
Titpawan Nakpheng, Supreedee Songkarak, Tan Suwandecha, Rutthapol Sritharadol, Charisopon Chunhachaichana, Teerapol Srichana
This study aimed to investigate the enantiomeric biotransformation of salbutamol in the human respiratory and liver cells. The cells from the different cell growth cycles were treated with various concentrations of salbutamol sulfate. Salbutamol and its metabolites were analyzed using chiral liquid chromatography and mass spectrometry. There were no metabolites of salbutamol found in the extracellular medium, intracellular, and cell lysate of respiratory cell lines. The S/R ratios of salbutamol were found to be 0...
November 17, 2016: Drug Metabolism and Pharmacokinetics
https://www.readbyqxmd.com/read/28318769/impact-of-meningococcal-c-conjugate-vaccination-four-years-after-introduction-of-routine-childhood-immunization-in-brazil
#18
Ana Lucia Andrade, Ruth Minamisava, Lisia Moura Tomich, Ana Paula Lemos, Maria Cecilia Gorla, Maria Cristina de Cunto Brandileone, Carla Madga S Domingues, Camile de Moraes, Gabriela Policena, Ana Luiza Bierrenbach
BACKGROUND: Routine infant immunization with meningococcal C conjugate (MCC) vaccination started in Brazil in November 2010, scheduled at three and five months plus a booster at 12-15months of age. No catch-up was implemented. We assessed the impact of vaccination on meningococcal C disease (MenC) four years after vaccination start in the National Immunization Program. METHODS: We performed an ecological quasi-experimental design from 2008 to 2014 using a deterministic linkage between the National Notification and the National Reference Laboratory databases for meningitis...
March 15, 2017: Vaccine
https://www.readbyqxmd.com/read/28318767/immunogenicity-and-safety-of-concomitant-administration-of-meningococcal-serogroup-b-4cmenb-and-serogroup-c-menc-crm-vaccines-in-infants-a-phase-3b-randomized-controlled-trial
#19
Marco Aurelio P Safadi, Federico Martinon-Torres, Lily Yin Weckx, Edson Duarte Moreira, Eduardo Jorge da Fonseca Lima, Ilhem Mensi, Marco Calabresi, Daniela Toneatto
BACKGROUND: After implementation of routine infant MenC vaccination, MenB remains a serious cause of meningococcal disease, yet to be targeted by vaccination programs in several countries. This study (NCT01339923) investigated the immunogenicity and safety of MenC CRM-conjugated vaccine (MenC-CRM) concomitantly administered with MenB vaccine (4CMenB). METHODS: Infants (N=251) were randomised 1:1 to receive 4CMenB and MenC-CRM (Group 1) or MenC-CRM alone (Group 2) at 3 and 5months (M3, M5) and a booster at 12months of age (M12), and pneumococcal vaccine at M3, M5, M7, M12...
March 15, 2017: Vaccine
https://www.readbyqxmd.com/read/28318472/antimicrobial-resistance-penicillin-binding-protein-sequences-and-pilus-islet-carriage-in-relation-to-clonal-evolution-of-streptococcus-pneumoniae-serotype-19a-in-russia-2002-2013
#20
N Mayanskiy, T Savinova, N Alyabieva, O Ponomarenko, E Brzhozovskaya, A Lazareva, L Katosova, R Kozlov
Clonal changes of serotype 19A pneumococci have been appreciated in conjunction with growing prevalence of this serotype after implementation of the seven-valent pneumococcal conjugate vaccine (PCV7). In the present study, we characterized serotype 19A pneumococci collected in Russia within a decade preceding the implementation of PCV vaccination and described their clonal evolution. We retrospectively analyzed non-invasive serotype 19A isolates collected in 2002-2013. All isolates were subjected to multilocus sequence typing, antimicrobial susceptibility testing, determination of macrolide resistance genotype, molecular detection of pilus islet (PI) carriage, sequencing of penicillin-binding protein (PBP) genes...
March 20, 2017: Epidemiology and Infection
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