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https://www.readbyqxmd.com/read/29778001/patchy-gold-coated-fe-3-o-4-nanospheres-with-enhanced-catalytic-activity-applied-for-paper-based-bipolar-electrode-electrochemiluminescence-aptasensors
#1
Xin Zhang, Ning Bao, Xiliang Luo, Shou-Nian Ding
In this work, novel multifunctional patchy gold coated Fe3 O4 hybrid nanoparticles (PG-Fe3 O4 NPs) have been successfully synthesized in aqueous medium via a facile adsorption-reduction method. A rational formation mechanism has been proposed by monitoring the morphological evolution. The PG-Fe3 O4 NPs retained the good magnetic property and exhibited excellent catalytical effeciency towards the electrochemical reduction of hydrogen peroxide. Chronoamperometric and amperometric experiments indicated a relatively high catalytic rate constant of 3...
May 10, 2018: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29777794/regulatory-t-cell-targeted-hybrid-nanoparticles-combined-with-immuno-checkpoint-blockage-for-cancer-immunotherapy
#2
Wenquan Ou, Raj Kumar Thapa, Liyuan Jiang, Soe Zar Chi, Milan Gautam, Jae-Hoon Chang, Jee-Heon Jeong, Sae Kwang Ku, Han-Gon Choi, Chul Soon Yong, Jong Oh Kim
Immunosuppression in tumor microenvironments induced by regulatory T (Treg) cells is regarded a critical mechanism of tumor immune escape and poses a major impediment to cancer immunotherapy. In this study, we developed tLyp1 peptide-conjugated hybrid nanoparticles for targeting Treg cells in the tumor microenvironment. The tLyp1 peptide-modified hybrid nanoparticles presented good stability and effective targeting to Treg cells, and they enhanced the effect of imatinib in downregulating Treg cell suppression through inhibition of STAT3 and STAT5 phosphorylation...
May 16, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29777766/immune-response-and-protective-effect-against-spring-viremia-of-carp-virus-induced-by-intramuscular-vaccination-with-a-swcnts-dna-vaccine-encoding-matrix-protein
#3
Chen Zhang, Zhao Zhao, Gao-Yang Liu, Jian Li, Gao-Xue Wang, Bin Zhu
To elicit the immune protective of vaccine against the highly contagious and pathogenic disease caused by spring viremia of carp virus (SVCV), a novel functionalized single-walled carbon nanotubes (SWCNTs) were applied as a delivery vehicle for DNA vaccine. In this study, we report a SWCNTs-DNA vaccine encoding matrix protein of SVCV which, when injected in the muscle at a dose of 10 μg SWCNTs-pcDNA-M vaccine, confers up to 51.3% protection against intraperitoneal challenge with SVCV. In addition, SWCNTs as a promising vehicle can enhance about 17...
May 16, 2018: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/29777718/malnutrition-is-associated-with-diminished-baseline-and-mycobacterial-antigen-stimulated-chemokine-responses-in-latent-tuberculosis-infection
#4
Rajamanickam Anuradha, Saravanan Munisankar, Yukthi Bhootra, Nathella Pavan Kumar, Chandrakumar Dolla, Subash Babu
OBJECTIVES: Previous studies have demonstrated a diminution in the baseline and mycobacterial antigen - specific cytokines in low body mass index (LBMI) individuals with latent tuberculosis infection (LTBI). We hypothesized that LBMI might be also associated with alteration in the baseline and antigen - stimulated levels of chemokines in LTBI. METHODS: To test this hypothesis, we examined baseline, TB- antigen and mitogen stimulated levels of chemokines in these individuals and compared them with those with LTBI and normal BMI (NBMI)...
May 16, 2018: Journal of Infection
https://www.readbyqxmd.com/read/29777684/repositioning-of-anti-cancer-drug-candidate-azd7762-to-an-anti-allergic-drug-suppressing-ige-mediated-mast-cells-and-allergic-responses-via-the-inhibition-of-lyn-and-fyn
#5
Young Hwan Park, Do Kyun Kim, Hyun Woo Kim, Hyuk Soon Kim, Dajeong Lee, Min Bum Lee, Keun Young Min, Jimo Koo, Su Jeong Kim, Changhee Kang, Young Mi Kim, Hyung Sik Kim, Wahn Soo Choi
Mast cells are critical effector cells in IgE-mediated allergic responses. The aim of this study was to investigate the anti-allergic effects of 3-[(aminocarbonyl)amino]-5-(3-fluorophenyl)-N-(3S)-3-piperidinyl-2-thiophenecarboxamide (AZD7762) in vitro and in vivo. AZD7762 inhibited the antigen-stimulated degranulation from RBL-2H3 (IC50 , ∼ 27.9 nM) and BMMCs (IC50 , ∼ 99.3 nM) in a dose-dependent manner. AZD7762 also inhibited the production of TNF-α and IL-4. As the mechanism of its action, AZD7762 inhibited the activation of Syk and its downstream signaling proteins, such as Linker of activated T cells (LAT), phospholipase (PL) Cγ1, Akt, and mitogen-activated protein (MAP) kinases (Erk1 / 2, p38, and JNK) in mast cells...
May 16, 2018: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29777675/brain-derived-microparticles-activate-microglia-macrophages-and-induce-neuroinflammation
#6
Hongtao Rong, Yueshan Fan, Mengchen Yang, Baoliang Zhang, Dongdong Sun, Zilong Zhao, Dong Wang, Weidong Fan, Jianhao Wang, Gang Gu, Fanjian Li, Xilei Liu, Chenxu Rao, Huijiao Chen, Yi Wang, Ye Tian, Jianning Zhang
Microparticles are cell fragments derived from damaged cells that are able to present an antigen from the parent cells to other cells to activate intracellular signaling pathways. Microparticles are closely related to the inflammatory response. Brain-derived microparticles (BDMPs) play an important role in brain injury. However, the inflammatory effect of BDMPs on microglia/macrophages remains unclear. The BDMPs were consumed by microglia/macrophages in vivo and in vitro. The BDMPs activated microglia/macrophages and changed their morphology in vitro...
May 16, 2018: Brain Research
https://www.readbyqxmd.com/read/29777657/mcv-mir-m1-targets-the-host-cell-immune-response-resulting-in-the-attenuation-of-neutrophil-chemotaxis
#7
P Akhbari, D Tobin, K Poterlowicz, W Roberts, J R Boyne
Virus-encoded miRNAs are emerging as key regulators of persistent infection and host-cell immune evasion. Merkel cell polyomavirus (MCPyV), the predominant aetiological agent of Merkel cell carcinoma (MCC), encodes a single miRNA, MCV-miR-M1, which targets the oncogenic MCPyV large T antigen (LT). MCV-miR-M1 has previously been shown to play an important role in establishment of long-term infection, however, the underlying mechanism is not fully understood. A key unanswered question is whether, in addition to auto-regulating LT, MCV-miR-M1 also targets cellular transcripts to orchestrate an environment conducive for persistent infection...
May 16, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29777523/application-of-cu-64-nodaga-psma-pet-in-prostate-cancer
#8
Sabina Sevcenco, Hans Christoph Klingler, Klaus Eredics, Alexander Friedl, Jenifer Schneeweiss, Peter Knoll, Thomas Kunit, Lukas Lusuardi, Siroos Mirzaei
INTRODUCTION: The high diagnostic potential of 64 Cu-PSMA PET-CT imaging was clinically investigated in prostate cancer patients with recurrent disease and in the primary staging of selected patients with advanced local disease. The aim of our study is to assess the uptake behavior in the clinical setting of 64Copper Prostate-Specific Membrane Antigen (64 Cu PSMA) Positron Emission Tomography/Computed Tomography (PET/CT) in prostate cancer. METHODS: A retrospective study was performed in 23 patients with intermediate, high risk and progressive disease at primary staging of prostate cancer...
May 17, 2018: Advances in Therapy
https://www.readbyqxmd.com/read/29777458/increased-vitamin-d-receptor-gene-expression-and-rs11568820-and-rs4516035-promoter-polymorphisms-in-autistic-disorder
#9
Burhan Balta, Hakan Gumus, Ruslan Bayramov, Keziban Korkmaz Bayramov, Murat Erdogan, Didem Behice Oztop, Muhammet Ensar Dogan, Serpil Taheri, Munis Dundar
Although there are a large number of sequence variants of different genes and copy number variations at various loci identified in autistic disorder (AD) patients, the pathogenesis of AD has not been elucidated completely. Recently, in AD patients, a large number of expression array and transcriptome studies have shown an increase in the expression of genes especially related to innate immune response. Antimicrobial effects of vitamin D and VDR are exerted through Toll-Like-Receptors (TLR) which have an important role in the innate immune response, are expressed by antigen presenting cells and recognize foreign microorganisms...
May 18, 2018: Molecular Biology Reports
https://www.readbyqxmd.com/read/29777440/mir-27a-b-regulates-liver-regeneration-by-posttranscriptional-modification-of-tmub1
#10
Xiang Lan, Guangyao Li, Hongming Liu, Hangwei Fu, Ping Chen, Menggang Liu
BACKGROUND: Transmembrane and ubiquitin-like domain-containing 1 protein (Tmub1) negatively regulates liver regeneration. However, whether this regulation involves posttranscriptional modification of Tmub1 expression is unknown. AIM: The aim of the study was to investigate whether microRNA (miR)-27a/b regulates posttranscriptional modification of Tmub1 and cell proliferation during liver regeneration. METHODS: Tmub1 mRNA 3'-untranslated region (UTR) sequences were analyzed using online software...
May 17, 2018: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/29777228/effects-of-clomiphene-citrate-on-male-obesity-associated-hypogonadism-a-randomized-double-blind-placebo-controlled-study
#11
Andressa Heimbecher Soares, Nidia Celeste Horie, Lucas Augusto Piccinin Chiang, Bruno Caramelli, Mariana Gomes Matheus, Alexandre Holthausen Campos, Luciana Cavalheiro Marti, Fernanda Agostini Rocha, Marcio C Mancini, Elaine Maria Frade Costa, Cintia Cercato
BACKGROUND: Obesity causes secondary hypogonadism (HG) in men. Standard testosterone (T) replacement therapy improves metabolic parameters but leads to infertility. OBJECTIVE: To evaluate clomiphene citrate (CC) treatment of adult men with male obesity-associated secondary hypogonadism (MOSH). DESIGN: Single-center, randomized, double-blind, placebo-controlled trial. PARTICIPANTS: Seventy-eight men aged 36.5 ± 7...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29777169/difructose-dianhydride-improves-intestinal-calcium-absorption-wound-healing-and-barrier-function
#12
Sang In Lee, In Ho Kim
The gastrointestinal tract (GIT) is critical for nutrient absorption and is an important barrier against harmful pathogens and antigens. Difructose anhydrides (DFA)-IVs are nondigestible disaccharides that enhance calcium and iron absorption by affecting the intestinal epithelial tissue. However, their effects on intestinal functions are not fully understood. In this study, we performed a feeding trial and found that dietary DFA-IVs improved growth performance, relative breast muscle and liver weight, and digestibility and blood calcium and iron concentrations in broilers...
May 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29777102/a-virus-like-particle-based-tetravalent-vaccine-for-hand-foot-and-mouth-disease-elicits-broad-and-balanced-protective-immunity
#13
Wei Zhang, Wenlong Dai, Chao Zhang, Yu Zhou, Pei Xiong, Shuxia Wang, Xiaohua Ye, Qingwei Liu, Dongming Zhou, Zhong Huang
Hand, foot, and mouth disease (HFMD) is an infectious disease that mainly affects infants and children, causing considerable morbidity and mortality worldwide. HFMD is commonly caused by enterovirus 71 (EV71) and coxsackieviruses A16 (CVA16), A6 (CVA6), and A10 (CVA10). Formalin-inactivated EV71 vaccines are currently available in China; however, these vaccines fail to confer cross-protection against infections by other HFMD-causing enteroviruses, highlighting the necessity of developing a multivalent HFMD vaccine...
May 18, 2018: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/29776993/tumor-immune-evasion-arises-through-loss-of-tnf-sensitivity
#14
Conor J Kearney, Stephin J Vervoort, Simon J Hogg, Kelly M Ramsbottom, Andrew J Freeman, Najoua Lalaoui, Lizzy Pijpers, Jessica Michie, Kristin K Brown, Deborah A Knight, Vivien Sutton, Paul A Beavis, Ilia Voskoboinik, Phil K Darcy, John Silke, Joseph A Trapani, Ricky W Johnstone, Jane Oliaro
Immunotherapy has revolutionized outcomes for cancer patients, but the mechanisms of resistance remain poorly defined. We used a series of whole-genome clustered regularly interspaced short palindromic repeat (CRISPR)-based screens performed in vitro and in vivo to identify mechanisms of tumor immune evasion from cytotoxic lymphocytes [CD8+ T cells and natural killer (NK) cells]. Deletion of key genes within the tumor necrosis factor (TNF) signaling, interferon-γ (IFN-γ) signaling, and antigen presentation pathways provided protection of tumor cells from CD8+ T cell-mediated killing and blunted antitumor immune responses in vivo...
May 18, 2018: Science Immunology
https://www.readbyqxmd.com/read/29776807/public-health-surveillance-of-multidrug-resistant-clones-of-neisseria-gonorrhoeae-in-europe-a-genomic-survey
#15
Simon R Harris, Michelle J Cole, Gianfranco Spiteri, Leonor Sánchez-Busó, Daniel Golparian, Susanne Jacobsson, Richard Goater, Khalil Abudahab, Corin A Yeats, Beatrice Bercot, Maria José Borrego, Brendan Crowley, Paola Stefanelli, Francesco Tripodo, Raquel Abad, David M Aanensen, Magnus Unemo
BACKGROUND: Traditional methods for molecular epidemiology of Neisseria gonorrhoeae are suboptimal. Whole-genome sequencing (WGS) offers ideal resolution to describe population dynamics and to predict and infer transmission of antimicrobial resistance, and can enhance infection control through linkage with epidemiological data. We used WGS, in conjunction with linked epidemiological and phenotypic data, to describe the gonococcal population in 20 European countries. We aimed to detail changes in phenotypic antimicrobial resistance levels (and the reasons for these changes) and strain distribution (with a focus on antimicrobial resistance strains in risk groups), and to predict antimicrobial resistance from WGS data...
May 15, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29776753/genetic-and-antigenic-relationship-of-foot-and-mouth-disease-virus-serotype-o-isolates-with-the-vaccine-strain-o1-bfs
#16
Wanhong Xu, Zhidong Zhang, Charles Nfon, Ming Yang
Foot-and-mouth disease serotype O viruses (FMDV/O) are responsible for the most outbreaks in FMD endemic countries. O1/BFS is one of the recommended FMD/O vaccine strains by World Reference Laboratory for FMD. In the current study, FMDV/O1 BFS vaccine strain and serotype O field isolates (45) were analyzed phylogenetically and antigenically to gain more insight into the genetic and antigenic characteristics of the vaccine strain and field isolates. O1/BFS showed similarity with 89% of the field isolates using a virus neutralization test (VNT)...
May 15, 2018: Vaccine
https://www.readbyqxmd.com/read/29776751/development-of-an-opsonophagocytic-killing-assay-for-group-a-streptococcus
#17
Scott Jones, Nicole J Moreland, Marta Zancolli, Jeremy Raynes, Jacelyn M S Loh, Pierre R Smeesters, Shiranee Sriskandan, Jonathan R Carapetis, John D Fraser, David Goldblatt
Group A Streptococcus (GAS) or Streptococcus pyogenes is responsible for an estimated 500,000 deaths worldwide each year. Protection against GAS infection is thought to be mediated by phagocytosis, enhanced by bacteria-specific antibody. There are no licenced GAS vaccines, despite many promising candidates in preclinical and early stage clinical development, the most advanced of which are based on the GAS M-protein. Vaccine progress has been hindered, in part, by the lack of a standardised functional assay suitable for vaccine evaluation...
May 15, 2018: Vaccine
https://www.readbyqxmd.com/read/29776631/molecular-pathology-in-transfusion-medicine-new-concepts-and-applications
#18
REVIEW
Matthew B Elkins, Robertson D Davenport, Martin H Bluth
Virtually all the red blood cell and platelet antigen systems have been characterized at the molecular level. Highly reliable methods for red blood cell and platelet antigen genotyping are now available. Genotyping is a useful adjunct to traditional serology and can help resolve complex serologic problems. Although red blood cell and platelet phenotypes can be inferred from genotype, knowledge of the molecular basis is essential for accurate assignment. Genotyping of blood donors is an effective method of identifying antigen-negative and/or particularly rare donors...
June 2018: Clinics in Laboratory Medicine
https://www.readbyqxmd.com/read/29776614/characterisation-of-peripheral-blood-mononuclear-cell-populations-in-periparturient-dairy-cows-that-develop-metritis
#19
John J Bromfield, Meghan M Watt, Sossi M Iacovides
Bacterial contamination of the uterus following calving is ubiquitous in the dairy cow, 40% of cows develop postpartum uterine infection, including metritis. While predisposing factors like twinning and dystocia are associated with metritis, it is unclear why some cows remain healthy following calving and others develop uterine infection, negatively impacting animal health, milk production and economic return. Here, we profiled peripheral blood mononuclear cells of cows before calving and during postpartum metritis...
June 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29776613/high-resolution-melting-analysis-hrm-for-the-assessment-of-clonality-in-feline-b-cell-lymphomas
#20
Manfred Henrich, Svenja Scheffold, Werner Hecht, Manfred Reinacher
Analysis of clonality is gaining importance in diagnosing lymphomas in veterinary medicine. Usually, PCR for the analysis of antigen receptor rearrangement (PARR) is followed by electrophoretic separation of the PCR products. Aim of this study was to test the feasibility of HRM for the assessment of clonality in B-cell lymphomas of cats. High resolution melting analysis differentiates PCR products by their different melting point using the decrease in fluorescence of an intercalating dye during melting of the PCR product...
June 2018: Veterinary Immunology and Immunopathology
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