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https://www.readbyqxmd.com/read/28917537/hbcag-produced-in-transgenic-tobacco-triggers-th1-and-th2-response-when-intramuscularly-delivered
#1
Marcin Pyrski, Anna Rugowska, Kamil Robert Wierzbiński, Anna Kasprzyk, Maria Bogusiewicz, Piotr Bociąg, Sławomir Samardakiewicz, Marcin Czyż, Maciej Kurpisz, Tomasz Pniewski
Hepatitis B core Antigen (HBcAg) assembled into Capsid-Like Particles (CLPs) is investigated as a therapeutic vaccine in treatment of chronic hepatitis B (CHB) and in diagnostic tests or as a carrier for various epitopes. While the expression of HBcAg has been thoroughly clarified in E. coli and yeast, it has also been investigated in other expression systems. Stably transformed tobacco expressed HBcAg at a level of 110-250µg/g fresh weight, therefore in view of its large leaf biomass it offers a production platform comparable with transient expression systems regarding the final yield of HBcAg...
September 13, 2017: Vaccine
https://www.readbyqxmd.com/read/28916371/ramucirumab-plus-docetaxel-versus-placebo-plus-docetaxel-in-patients-with-locally-advanced-or-metastatic-urothelial-carcinoma-after-platinum-based-therapy-range-a-randomised-double-blind-phase-3-trial
#2
Daniel P Petrylak, Ronald de Wit, Kim N Chi, Alexandra Drakaki, Cora N Sternberg, Hiroyuki Nishiyama, Daniel Castellano, Syed Hussain, Aude Fléchon, Aristotelis Bamias, Evan Y Yu, Michiel S van der Heijden, Nobuaki Matsubara, Boris Alekseev, Andrea Necchi, Lajos Géczi, Yen-Chuan Ou, Hasan Senol Coskun, Wen-Pin Su, Miriam Hegemann, Ivor J Percent, Jae-Lyun Lee, Marcello Tucci, Andrey Semenov, Fredrik Laestadius, Avivit Peer, Giampaolo Tortora, Sufia Safina, Xavier Garcia Del Muro, Alejo Rodriguez-Vida, Irfan Cicin, Hakan Harputluoglu, Ryan C Widau, Astra M Liepa, Richard A Walgren, Oday Hamid, Annamaria H Zimmermann, Katherine M Bell-McGuinn, Thomas Powles
BACKGROUND: Few treatments with a distinct mechanism of action are available for patients with platinum-refractory advanced or metastatic urothelial carcinoma. We assessed the efficacy and safety of treatment with docetaxel plus either ramucirumab-a human IgG1 VEGFR-2 antagonist-or placebo in this patient population. METHODS: We did a randomised, double-blind, phase 3 trial in patients with advanced or metastatic urothelial carcinoma who progressed during or after platinum-based chemotherapy...
September 12, 2017: Lancet
https://www.readbyqxmd.com/read/28916316/the-brucella-melitensis-m5-90%C3%AE-manb-live-vaccine-candidate-is-safer-than-m5-90-and-confers-protection-against-wild-type-challenge-in-balb-c-mice
#3
Junbo Zhang, Shuanghong Yin, Dewu Yi, Hong Zhang, Zhiqiang Li, Fei Guo, Chuangfu Chen, Weihuan Fang, Jiafu Wang
Brucellosis is a globally distributed zoonotic disease that causes animal and human diseases. Although effective, the current Brucella vaccines (strain M5-90 or others) have several drawbacks. The first is their residual virulence for animals and humans and the second is their inability to differentiate natural infection from that caused by vaccination. In the present study, Brucella melitensis M5-90 manB mutant (M5-90ΔmanB) was generated to overcome these drawbacks. M5-90ΔmanB showed significantly reduced survival in macrophages and mice, and induced strong protective immunity in BALB/c mice...
September 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28915996/alternative-strategy-for-visceral-leishmaniosis-control-hisak70-salmonella-choleraesuis-pulsed-dendritic-cells
#4
Gustavo Domínguez-Bernal, Abel Martínez-Rodrigo, Alicia Mas, M Mar Blanco, José A Orden, Ricardo De La Fuente, Javier Carrión
Here, we describe a novel approach that exploits an attenuated mutant of Salmonella enterica serovar Choleraesuis as carrier to deliver a plasmid encoding protein HisAK70. Subsequently, dendritic cells (DCs) were pulsed with this vaccine vector. The aim of this study was to evaluate the effectiveness of the prepared HisAK70-S. Choleraesuis-pulsed DCs (HisAK70-SAL DCs) against visceral leishmaniosis (VL). In our ex vivo model of infection, the prepared formulations could decrease parasite growth by up to 80% by augmenting the production of IL-12p40 and by reducing arginase activity (ARG)...
October 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28912097/igg-subclasses-quantitation-analytical-performance-of-the-binding-site-spaplus%C3%A2-human-assay-and-comparison-with-siemens-bnii%C3%A2-assay
#5
Ana Sarnago, Rosa M Pascual, María J Moreno, Begoña Laíz, Oscar Fuster
OBJECTIVES: Accurate evaluation of analyzers is highly recommended before these devices are broadly introduced for routine testing. Concerning quantification of IgG subclasses (IgGSc), standardization has not yet been reached and thus different assays might lead to different results. Here we report the analytical performances of The Binding Site (TBS) SPAPLUS® human IgGSc assay and the concordance with the Siemens BNII® human IgGSc assay. DESIGN AND METHODS: We evaluated precision, LoB, LoD and linearity of TBS SPAPLUS® human IgGSc immunoassay...
September 11, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28901553/total-leishmania-antigens-with-poly-i-c-induce-th1-protective-response
#6
Maria Victoria Sanchez, Ricardo Javier Eliçabe, María Silvia Di Genaro, María José Germanó, Susana Gea, María Fernanda García Bustos, María Cristina Salomón, Eduardo Alberto Scodeller, Diego Esteban Cargnelutti
AIMS: Our proposal was to develop a vaccine based on total Leishmania antigens (TLA) adjuvanted with polyinosinic-polycytidylic acid [Poly(I:C)] able to induce a Th1 response which can provide protection against Leishmania infection. METHODS AND RESULTS: Mice were vaccinated with two doses of TLA-Poly(I:C) administered by subcutaneous route at three week interval. Humoral and cellular immune responses induced by the immunization were measured. The protective efficacy of the vaccine was evaluated by challenging mice with infective promastigotes of Leishmania (Leishmania) amazonensis into the footpad...
September 13, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28901397/beneficial-effect-of-20%C3%A2-hydroxyecdysone-exerted-by-modulating-antioxidants-and-inflammatory-cytokine-levels-in-collagen%C3%A2-induced-arthritis-a-model-for-rheumatoid-arthritis
#7
You Sun, De-Li Zhao, Zi-Xuan Liu, Xue-Hui Sun, Yang Li
Rheumatoid arthritis is a chronic autoimmune disease characterized by an elevated synovial inflammatory response, with destruction or erosion of articular cartilage in major joints. The aim of the present study was to examine whether 20‑hydroxyecdysone (HES) is able to ameliorate oxidative stress and inflammatory responses in a collagen‑induced rheumatoid arthritis (CIA) rat model. A total of 40 healthy male rats were selected arbitrarily and separated into four groups. Rats treated with saline served as a control (group I), rats subjected to CIA induction by intradermal injection of bovine collagen II type served as the induced group (group II), while rats induced with CIA and administered with 10 and 20 mg/kg bodyweight HES for 28 days served as treatment groups (groups III and IV)...
August 29, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28901177/evaluation-of-an-fcrn-affinity-chromatographic-method-for-igg1-type-antibodies-and-evaluation-of-igg-variants
#8
Florian Cymer, Tilman Schlothauer, Alexander Knaupp, Hermann Beck
AIM: The neonatal Fc-receptor (FcRn) mediates long serum half-life of therapeutic IgG-type antibodies. This interaction represents a critical quality attribute in terms of pharmacokinetics and should be covered by respective quality control strategies. Antibodies are taken up by cells unspecifically and can bind to FcRn in early endosomes preventing lysosomal degradation and allowing release back into circulation. Reflecting this complex cycle in an in vitro assay strategy represents a challenging task...
September 13, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28901160/development-of-a-plug-and-play-immunopcr-technique-for-the-analysis-of-biomolecules
#9
Sreeja Gopal, Shobha Purushothama, Alvydas Mikulskis, Lauren Stevenson
AIM: ImmunoPCR technology combines the advantages of specificity and robustness of a ligand binding assay with the amplification potential of PCR. We describe through three case studies a plug-and-play immuno polymerase chain reaction (iPCR) technique to measure biomolecules. RESULTS: Case Study 1 demonstrated feasibility of measurement of IgG1 in cerebrospinal fluid at the desired level of sensitivity with minimal cost and timelines of clinical assay implementation...
September 13, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28900133/fcn1-m-ficolin-which-directly-associates-with-immunoglobulin-g1-is-a-molecular-target-of-intravenous-immunoglobulin-therapy-for-kawasaki-disease
#10
Daisuke Okuzaki, Kaori Ota, Shin-Ichi Takatsuki, Yukari Akiyoshi, Kazuyuki Naoi, Norikazu Yabuta, Tsutomu Saji, Hiroshi Nojima
Kawasaki disease (KD), an acute systemic vasculitis of early childhood, is of unknown etiology. High-dose intravenous immunoglobulin (IVIG) is an effective treatment, but its molecular target remains elusive. DNA microarray analysis of peripheral blood mononuclear cells (PBMCs) revealed that at least 21 genes are drastically down-regulated after IVIG treatment in most KD patients. qRT-PCR analysis confirmed that the mRNA levels of five of these genes were considerably reduced in almost all KD patients after IVIG treatment...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28893529/passive-immunity-to-control-bovine-coronavirus-diarrhea-in-a-dairy-herd-in-argentina
#11
Marina Bok, Martín Alassia, Flavia Frank, Celina G Vega, Andrés Wigdorovitz, Viviana Parreño
Bovine coronavirus (BCoV) is a viral enteric pathogen associated with calf diarrhea worldwide being, in Argentina, mostly detected in dairy husbandry systems. The aim of the present work was to study if maternal IgG1 antibodies (Abs) to BCoV acquired by colostrum intake modulate the development of BCoV infection in calves reared in a dairy farm in Argentina. Thirty Holstein calves were monitored during their first 60 days of age. Animals were classified into two groups depending on their initial BCoV IgG1 Ab titers...
September 8, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28891752/development-of-emab-51-a-sensitive-and-specific-anti-epidermal-growth-factor-receptor-monoclonal-antibody-in-flow-cytometry-western-blot-and-immunohistochemistry
#12
Shunsuke Itai, Mika K Kaneko, Yuki Fujii, Shinji Yamada, Takuro Nakamura, Miyuki Yanaka, Noriko Saidoh, Saori Handa, Yao-Wen Chang, Hiroyoshi Suzuki, Hiroyuki Harada, Yukinari Kato
The epidermal growth factor receptor (EGFR) is a member of the human epidermal growth factor receptor (HER) family of receptor tyrosine kinases and is involved in cell growth and differentiation. EGFR homodimers or heterodimers with other HER members, such as HER2 and HER3, activate downstream signaling cascades in many cancers. In this study, we developed novel anti-EGFR monoclonal antibodies (mAbs) and characterized their efficacy in flow cytometry, Western blot, and immunohistochemical analyses. First, we expressed the full-length or ectodomain of EGFR in LN229 glioblastoma cells and then immunized mice with LN229/EGFR or ectodomain of EGFR, and performed the first screening using enzyme-linked immunosorbent assays...
September 11, 2017: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy
https://www.readbyqxmd.com/read/28889999/humoral-immune-responses-during-asthma-and-influenza-co-morbidity-in-mice
#13
Laura A Doorley, Kim S LeMessurier, Amy R Iverson, Maneesha Palipane, Amali E Samarasinghe
Humoral immunity serve dual functions of direct pathogen neutralization and enhancement of leukocyte function. Antibody classes are determined by antigen triggers, and the resulting antibodies can contribute to disease pathogenesis and host defense. Although asthma and influenza are immunologically distinct diseases, since we have found that allergic asthma exacerbation promotes antiviral host responses to influenza A virus, we hypothesized that humoral immunity may contribute to allergic host protection during influenza...
September 7, 2017: Immunobiology
https://www.readbyqxmd.com/read/28888340/proteomic-analysis-of-influenza-haemagglutinin-specific-antibodies-following-vaccination-reveals-convergent-immunoglobulin-variable-region-signatures
#14
Penelope J Adamson, Mahmood A Al Kindi, Jing J Wang, Alex D Colella, Timothy K Chataway, Nikolai Petrovsky, Tom P Gordon, David L Gordon
Analysis of the anti-haemagglutinin serum antibody proteome from six H1N1pdm09 influenza A vaccinated subjects demonstrated restricted IgG1 heavy chain species encoded by IGHV5-51 and IGHV3-7 gene families in 2 subjects and either IGHV5-51 or IGHV3-7 in 4 individuals. All subjects exhibited a dominant IGKV3-20 light chain, however 5 subjects also exhibited IGKV3-11 and IGKV4-1 families. Sequences were closely aligned with the matched germline sequence, with few shared mutations. This study illustrates the feasibility of using a proteomic approach to determine the expressed V region signatures of serum antibodies induced by vaccination...
September 6, 2017: Vaccine
https://www.readbyqxmd.com/read/28887522/urban-pm2-5-exacerbates-allergic-inflammation-in-the-murine-lung-via-a-tlr2-tlr4-myd88-signaling-pathway
#15
Miao He, Takamichi Ichinose, Yasuhiro Yoshida, Keiichi Arashidani, Seiichi Yoshida, Hirohisa Takano, Guifan Sun, Takayuki Shibamoto
Nevertheless its mechanism has not been well explained yet, PM2.5 is recognized to exacerbate asthma. In the present study, the roles of toll-like receptor (TLR) 2, TLR4 and MyD88, in exacerbation of allergen-induced lung eosinophilia caused by urban PM2.5 was investigated. TLR2-, TLR4-, MyD88-deficient and WT BALB/c mice were intratracheally challenged with PM2.5 +/- ovalbumin (OVA) four times at 2-week intervals. PM2.5 increased neutrophil numbers and KC in bronchoalveolar lavage fluid and caused slight peribronchiolar inflammation in WT mice...
September 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28886581/skullcapflavone-ii-attenuates-ovalbumin-induced-allergic-rhinitis-through-the-blocking-of-th2-cytokine-production-and-mast-cell-histamine-release
#16
Thi Tho Bui, Chun Hua Piao, Chang Ho Song, Ok Hee Chai
Allergic rhinitis is a common heterogeneous chronic upper airway disorder and is an IgE-mediated inflammation characterized by one or more nasal symptoms such as sneezing, itching, nasal discharge, rhinorrhea, post nasal drainage and nasal blockage. In the present study, the effects of skullcapflavone II (SCFII) on upper airway inflammation, Th2 cytokines, and NF-κB signaling in an ovalbumin (OVA)-induced allergic rhinitis (AR) murine model in vivo were investigated. OVA-induced AR mice increased nasal symptoms, eosinophils and mast cells infiltration into nasal cavity, OVA-specific IgE/IgG1 and histamine in serum, Th2 cytokines including IL-13 and GATA3, and NF-κB signaling in NALF and lung homogenate...
September 5, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/28885497/influence-of-the-novel-atp-competitive-dual-mtorc1-2-inhibitor-azd2014-on-immune-cell-populations-and-heart-allograft-rejection
#17
Daniel Fantus, Helong Dai, Yoshihiro Ono, Alicia Watson, Shinichiro Yokota, Kanishka Mohib, Osamu Yoshida, Mark A Ross, Simon C Watkins, Bala Ramaswami, Anna Valusjkikh, David M Rothstein, Angus W Thomson
BACKGROUND: Little is known about how new generation adenosine triphosphate (ATP)-competitive mechanistic target of rapamycin (mTOR) kinase inhibitors (TORKinibs) affect immunity and allograft rejection. METHODS: mTOR complex (C) 1 and 2 signaling in dendritic cells (DC) and T cells was analyzed by Western blotting, while immune cell populations in normal and heart allograft recipient mice were analyzed by flow cytometry. Alloreactive T cell proliferation was quantified in MLR; intracellular cytokine production and serum antidonor IgG levels were determined by flow analysis and immunofluorescence staining used to detect IgG in allografts...
September 6, 2017: Transplantation
https://www.readbyqxmd.com/read/28883824/natural-killer-nk-cell-education-differentially-influences-hiv-antibody-dependent-nk-cell-activation-and-antibody-dependent-cellular-cytotoxicity
#18
REVIEW
Nicole F Bernard, Zahra Kiani, Alexandra Tremblay-McLean, Sanket A Kant, Christopher E Leeks, Franck P Dupuy
Immunotherapy using broadly neutralizing antibodies (bNAbs) endowed with Fc-mediated effector functions has been shown to be critical for protecting or controlling viral replication in animal models. In human, the RV144 Thai trial was the first trial to demonstrate a significant protection against HIV infection following vaccination. Analysis of the correlates of immune protection in this trial identified an association between the presence of antibody-dependent cellular cytotoxicity (ADCC) mediated by immunoglobulin G (IgG) antibodies (Abs) to HIV envelope (Env) V1/V2 loop structures and protection from infection, provided IgA Abs with competing specificity were not present...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28883727/vaccination-with-poly-d-l-lactide-co-glycolide-nanoparticles-loaded-with-soluble-leishmania-antigens-and-modified-with-a-tnf%C3%AE-mimicking-peptide-or-monophosphoryl-lipid-a-confers-protection-against-experimental-visceral-leishmaniasis
#19
Maritsa Margaroni, Maria Agallou, Evita Athanasiou, Olga Kammona, Costas Kiparissides, Catherine Gaitanaki, Evdokia Karagouni
Visceral leishmaniasis (VL) persists as a major public health problem, and since the existing chemotherapy is far from satisfactory, development of an effective vaccine emerges as the most appropriate strategy for confronting VL. The development of an effective vaccine relies on the selection of the appropriate antigen and also the right adjuvant and/or delivery vehicle. In the present study, the protective efficacy of poly(D,L-lactide-co-glycolide) (PLGA) nanoparticles (NPs), which were surface-modified with a TNFα-mimicking eight-amino-acid peptide (p8) and further functionalized by encapsulating soluble Leishmania infantum antigens (sLiAg) and monophosphoryl lipid A (MPLA), a TLR4 ligand, was evaluated against challenge with L...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28881712/tumor-antigen-ca125-suppresses-antibody-dependent-cellular-cytotoxicity-adcc-via-direct-antibody-binding-and-suppressed-fc-%C3%AE-receptor-engagement
#20
James Bradford Kline, Rina P Kennedy, Earl Albone, Qimin Chao, Shawn Fernando, Jennifer M McDonough, Katherine Rybinski, Wenquan Wang, Elizabeth B Somers, Charles Schweizer, Luigi Grasso, Nicholas C Nicolaides
Cancers employ a number of mechanisms to evade host immune responses. Here we report the effects of tumor-shed antigen CA125/MUC16 on suppressing IgG1-mediated antibody-dependent cellular cytotoxicity (ADCC). This evidence stems from prespecified subgroup analysis of a Phase 3 clinical trial testing farletuzumab, a monoclonal antibody to folate receptor alpha, plus standard-of-care carboplatin-taxane chemotherapy in patients with recurrent platinum-sensitive ovarian cancer. Patients with low serum CA125 levels treated with farletuzumab demonstrated improvements in progression free survival (HR 0...
August 8, 2017: Oncotarget
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