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https://www.readbyqxmd.com/read/29778472/effects-of-ad-libitum-milk-replacer-feeding-and-butyrate-supplementation-on-behavior-immune-status-and-health-of-holstein-calves-in-the-postnatal-period
#1
C Gerbert, D Frieten, C Koch, G Dusel, K Eder, T Stefaniak, J Bajzert, P Jawor, A Tuchscherer, H M Hammon
Animal welfare in dairy calf husbandry depends on calf rearing and is probably improved by intensive milk feeding programs. In addition, butyrate supplementation in milk replacer (MR) stimulates postnatal growth and may affect the immune system in calves. We have investigated the combined effects of ad libitum MR feeding and butyrate supplementation on feeding behavior, health, and the immune responses in calves. Holstein calves (n = 64) were examined from birth until wk 11 of age. Calves received MR either ad libitum (Adl) or restrictively (Res) with (AdlB+, ResB+) or without (AdlB-, ResB-) 0...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29775620/a-monoclonal-antibody-sandwich-elisa-for-vitamin-d-binding-protein-vdbp-is-unaffected-by-gc-globulin-phenotype-peptides-and-actin-and-demonstrates-reduced-levels-in-sepsis-and-non-sepsis-intensive-care-patients
#2
Katrina Hong, Christopher M Florkowski, Matthew P Doogue, Peter A Elder, John G Lewis
The measurement of vitamin D-binding protein (VDBP) by immunoassay has been confounded by variable antibody recognition of the Gc1s, Gc1F and Gc2 phenotypes. This has led to spurious conclusions regarding vitamin D status in different ethnic groups. In order to overcome these problems there is a requirement for VDBP antibodies that are unaffected by phenotype status. Here we report the generation and testing of three monoclonal antibodies to VDBP which recognise linear epitopes and are unaffected by vast molar excesses of synthetic peptides spanning these phenotypic domains...
May 15, 2018: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/29775210/the-effect-of-simulated-space-radiation-on-the-n-glycosylation-of-human-immunoglobulin-g1
#3
Mate Szarka, Szabolcs Szilasi, Boglarka Donczo, Daniel Sarkozy, Istvan Rajta, Andras Guttman
On a roundtrip to Mars, astronauts are expectedly exposed to an approximate amount of radiation that exceeds the lifetime limits on Earth. This elevated radiation dose is mainly due to Galactic Cosmic Rays (GCR) and Solar Particle Events (SPE). Specific patterns of the N-glycosylation of human immunoglobulins have already been associated with various ailments such as autoimmune diseases, malignant transformation, chronic inflammation and ageing. The focus of our work was to investigate the effect of low-energy proton irradiation on the IgG N-glycosylation profile with the goal if disease associated changes could be detected during space travel and not altered by space radiation...
May 18, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29773143/sex-and-vaccination-insights-from-female-rats-vaccinated-with-juvenile-specific-proteases-from-fasciola-hepatica
#4
Agnieszka Wesołowska, Katarzyna Basałaj, Luke J Norbury, Alicja Sielicka, Halina Wędrychowicz, Anna Zawistowska-Deniziak
Most animal research is less evidence-based for females, with the majority of studies conducted on males. Since immune responses vary between males and females, sexual dimorphism in immunity contributes, among other things, to sex-based differences post-vaccination. However, the issue of sex effects in animal vaccine research is rarely considered in vaccine study design. Previously, we have evaluated the efficacy of cathepsin L3 (FhCL3-1 and FhCL3-2) and B3 proteases (FhCB3) from juvenile Fasciola hepatica as vaccines against fasciolosis in male rats...
May 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29773139/systemic-humoral-immunity-in-beef-bulls-following-therapeutic-vaccination-against-tritrichomonas-foetus
#5
Christopher Alling, D Owen Rae, Xiaojie Ma, Laura Neumann, L Gene Lollis, Elizabeth Steele, John Yelvington, Hemant K Naikare, Heather Stockdale Walden, John Crews, Raoul Boughton
The utility of therapeutic vaccination of bulls against Tritrichomonas foetus has been advocated in previous studies, but anecdotal reports suggest this practice does not clear infections and may additionally confound diagnostic testing by reducing parasite burdens below detectable limits. The objective of this study was to characterize the systemic humoral immune response to therapeutic vaccination in T. foetus-infected bulls over a period of four months using an indirect ELISA and to compare the dynamics of this response to culture and PCR results to establish the existence of a relationship (or lack thereof) between immunization and infection status...
May 15, 2018: Veterinary Parasitology
https://www.readbyqxmd.com/read/29769573/discovery-of-a-novel-il-15-based-protein-with-improved-developability-and-efficacy-for-cancer-immunotherapy
#6
Qiyue Hu, Xin Ye, Xiangdong Qu, Dongbing Cui, Lei Zhang, Zhibin Xu, Hong Wan, Lianshan Zhang, Weikang Tao
Interleukin-15 (IL-15) can promote both innate and adaptive immune reactions by stimulating CD8+ /CD4+ T cells and natural killer cells (NK) while showing no effect in activating T-regulatory (Treg) cells or inducing activation-associated death among effector T cells and NK cells. Thus, IL-15 is considered as one of the most promising molecules for antitumor immune therapy. To improve the drug-like properties of natural IL-15, we create an IL-15-based molecule, named P22339, with the following characteristics: 1) building a complex of IL-15 and the Sushi domain of IL-15 receptor α chain to enhance the agonist activity of IL-15 via transpresentation; 2) through a rational structure-based design, creating a disulfide bond linking the IL-15/Sushi domain complex with an IgG1 Fc to augment its half-life...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29765290/extended-half-life-factor-viii-and-factor-ix-preparations
#7
REVIEW
Lukas Graf
In the last couple of years, several extended half-life factor VIII and factor IX preparations were intensively studied and gained approval. In order to extend half-lives, techniques like fusion to protein conjugates (Fc part of IgG1 or albumin), chemical modification (PEGylation), and protein sequence modification are implemented. With these techniques, it is possible to extend half-lives of factor IX products 4- to 6- fold, while half-life extension of factor VIII products is limited to 1.5- to 2-fold due to their interaction with von Willebrand factor...
April 2018: Transfusion Medicine and Hemotherapy
https://www.readbyqxmd.com/read/29763625/unbiased-combinatorial-screening-identifies-a-bispecific-igg1-that-potently-inhibits-her3-signaling-via-her2-guided-ligand-blockade
#8
Cecile A W Geuijen, Camilla De Nardis, David Maussang, Eric Rovers, Tristan Gallenne, Linda J A Hendriks, Therese Visser, Roy Nijhuis, Ton Logtenberg, John de Kruif, Piet Gros, Mark Throsby
HER2-driven cancers require phosphatidylinositide-3 kinase (PI3K)/Akt signaling through HER3 to promote tumor growth and survival. The therapeutic benefit of HER2-targeting agents, which depend on PI3K/Akt inhibition, can be overcome by hyperactivation of the heregulin (HRG)/HER3 pathway. Here we describe an unbiased phenotypic combinatorial screening approach to identify a bispecific immunoglobulin G1 (IgG1) antibody against HER2 and HER3. In tumor models resistant to HER2-targeting agents, the bispecific IgG1 potently inhibits the HRG/HER3 pathway and downstream PI3K/Akt signaling via a "dock & block" mechanism...
May 14, 2018: Cancer Cell
https://www.readbyqxmd.com/read/29762161/anti-hiv-igm-protects-against-mucosal-shiv-transmission
#9
Siqi Gong, Khamis Tomusange, Viraj Kulkarni, Opeyemi S Adeniji, Samir K Lakhashe, Dinesh Hariraju, Amanda Strickland, Elizabeth Plake, Patrice A Frost, Sarah J Ratcliffe, Liping Wang, Eileen M Lafer, Ruth M Ruprecht
OBJECTIVE: Worldwide, most new HIV infections occur through mucosal exposure. Immunoglobulin M (IgM) is the first antibody class generated in response to infectious agents; IgM is present in the systemic circulation and in mucosal fluids as secretory IgM. We sought to investigate for the first time the role of IgM in preventing AIDS virus acquisition in vivo. DESIGN: Recombinant polymeric monoclonal IgM was generated from the neutralizing monoclonal IgG1 antibody 33C6-IgG1, tested in vitro, and given by passive intrarectal (i...
May 11, 2018: AIDS
https://www.readbyqxmd.com/read/29761642/immunological-blocking-of-spermidine-mediated-host-pathogen-communication-provides-effective-control-against-pseudomonas-aeruginosa-infection
#10
Jianhe Wang, Jing Wang, Lian-Hui Zhang
Pseudomonas aeruginosa is known to cause life-threatening infections. The previous studies showed that the type III secretion system (T3SS) of this pathogen is a key virulence determinant, which is activated by polyamines signals spermidine (Spd) and spermine (Spm) from mammalian host. To test the potential of blocking host-pathogen communication in disease control, in this study we developed a high potency mouse monoclonal antibody (Mab 4E4, IgG1 sub-isotype) by using Spm-protein conjugate as an immunogen...
May 14, 2018: Microbial Biotechnology
https://www.readbyqxmd.com/read/29760434/multimerized-igg1-fc-molecule-as-an-anti-inflammatory-agent
#11
Emmanuel Stephen-Victor, Jagadeesh Bayry
No abstract text is available yet for this article.
May 14, 2018: Nature Reviews. Rheumatology
https://www.readbyqxmd.com/read/29758289/exposure-to-a-combination-of-formaldehyde-and-dinp-aggravated-asthma-like-pathology-through-oxidative-stress-and-nf-%C3%AE%C2%BAb-activation
#12
Jun Kang, Jiufei Duan, Jing Song, Chen Luo, Hong Liu, Baizhan Li, Xu Yang, Wei Yu, Mingqing Chen
Several epidemiological and experimental studies indicate a positive association between exposure to formaldehyde or phthalates and allergic asthma. However, nothing is yet known about the effects of exposure to formaldehyde and phthalates together, nor the role of each on allergic asthma. Here, we investigated the effects of a combined exposure to formaldehyde and diisononyl phthalate (DINP) on asthma-like pathology in mice, and determined the underlying mechanisms implicated in NF-κB and ROS. Mice were exposed to formaldehyde and/or DINP and sensitization with OVA...
May 11, 2018: Toxicology
https://www.readbyqxmd.com/read/29757629/signature-of-antibody-domain-exchange-by-native-mass-spectrometry-and-collision-induced-unfolding
#13
Yasunori Watanabe, Snezana Vasiljevic, Joel D Allen, Gemma E Seabright, Helen Duyvesteyn, Katie J Doores, Max Crispin, Weston B Struwe
The development of domain-exchanged antibodies offers a route to high affinity targeting to clustered multivalent epitopes, such as those associated with viral infections and many cancers. One strategy to generate these antibodies is to introduce mutations into target antibodies to drive domain-exchange using the only known naturally-occurring domain-exchanged anti-HIV IgG1 antibody 2G12, as a template. Here, we show that domain-exchange can be sensitively monitored by ion-mobility mass spectrometry and gas-phase collision induced unfolding...
May 14, 2018: Analytical Chemistry
https://www.readbyqxmd.com/read/29755449/immunization-elicits-antigen-specific-antibody-sequestration-in-dorsal-root-ganglia-sensory-neurons
#14
Manojkumar Gunasekaran, Prodyot K Chatterjee, Andrew Shih, Gavin H Imperato, Meghan Addorisio, Gopal Kumar, Annette Lee, John F Graf, Dan Meyer, Michael Marino, Christopher Puleo, Jeffrey Ashe, Maureen A Cox, Tak W Mak, Chad Bouton, Barbara Sherry, Betty Diamond, Ulf Andersson, Thomas R Coleman, Christine N Metz, Kevin J Tracey, Sangeeta S Chavan
The immune and nervous systems are two major organ systems responsible for host defense and memory. Both systems achieve memory and learning that can be retained, retrieved, and utilized for decades. Here, we report the surprising discovery that peripheral sensory neurons of the dorsal root ganglia (DRGs) of immunized mice contain antigen-specific antibodies. Using a combination of rigorous molecular genetic analyses, transgenic mice, and adoptive transfer experiments, we demonstrate that DRGs do not synthesize these antigen-specific antibodies, but rather sequester primarily IgG1 subtype antibodies...
2018: Frontiers in Immunology
https://www.readbyqxmd.com/read/29752757/subcutaneous-immunotherapy-suppresses-th2-inflammation-and-induces-neutralizing-antibodies-but-sublingual-immunotherapy-suppresses-airway-hyperresponsiveness-in-grass-pollen-mouse-models-for-allergic-asthma
#15
Laura Hesse, Uilke Brouwer, Arjen H Petersen, Renée Gras, Lisette Bosman, Jens Brimnes, Joanne N G Oude Elberink, Antoon J M van Oosterhout, Martijn C Nawijn
BACKGROUND: Both subcutaneous and sublingual allergen immunotherapy (SCIT and SLIT) have been shown to effectively suppress allergic manifestations upon allergen exposure, providing long term relief from symptoms in allergic disorders including allergic asthma. Clinical studies directly comparing SCIT and SLIT report a different kinetics and magnitude of immunological changes induced during treatment. Comparative studies into the mechanisms underlying immune suppression in SCIT and SLIT are lacking...
May 12, 2018: Clinical and Experimental Allergy: Journal of the British Society for Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29752706/tildrakizumab-first-global-approval
#16
Anthony Markham
Merck & Company Inc. have developed tildrakizumab (tildrakizumab-asmn; Ilumya™), a high-affinity, humanised IgG1 κ monoclonal antibody that specifically targets interleukin-23 p19, as a treatment for chronic plaque psoriasis. The drug was recently approved for marketing by the US FDA based on positive results from the phase III reSURFACE clinical trial programme in patients with chronic plaque psoriasis. This article summarizes the milestones in the development of tildrakizumab leading to this first approval for the treatment of adults with moderate-to-severe chronic plaque psoriasis who are candidates for systemic therapy or phototherapy...
May 11, 2018: Drugs
https://www.readbyqxmd.com/read/29752426/protein-engineering-on-human-recombinant-follistatin-enhancing-pharmacokinetic-characteristics-for-therapeutic-application
#17
Chuan Shen, Andrea Iskenderian, Dianna Lundberg, Tao He, Kathleen Palmieri, Robert Crooker, Qingwei Deng, Matthew Traylor, Sheng Gu, Haojing Rong, David Ehmann, Brian Pescatore, Bettina Strack-Logue, Alla Romashko, George Baviello, John Gill, Bohong Zhang, Muthuraman Meiyappan, Clark Pan, Angela W Norton
Follistatin (FS) is an important regulatory protein, a natural antagonist for transforming growth factor beta family members activin and myostatin. The diverse biological roles of the activin and myostatin signaling pathways make FS a promising therapeutic target for treating human diseases exhibiting inflammation, fibrosis and muscle disorders, such as Duchenne muscular dystrophy. However, rapid heparin-mediated hepatic clearance of FS limits its therapeutic potential. We targeted the heparin binding loop of FS for site-directed mutagenesis to improve clearance parameters...
May 11, 2018: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/29751008/impact-of-glycosylation-on-the-local-backbone-flexibility-of-well-defined-igg1-fc-glycoforms-using-hydrogen-exchange-mass-spectrometry-hx-ms
#18
Apurva S More, Ronald T Toth, Solomon Z Okbazghi, C Russell Middaugh, Sangeeta B Joshi, Thomas J Tolbert, David B Volkin, David D Weis
We have utilized hydrogen exchange-mass spectrometry (HX-MS) to characterize local backbone flexibility of four well-defined IgG1-Fc glycoforms expressed and purified from Pichia pastoris, two of which were prepared using subsequent in vitro enzymatic treatments. Progressively decreasing the size of the N-linked N297 oligosaccharide from high mannose (Man8-Man12), to Man5, to GlcNAc, to non-glycosylated N297Q resulted in progressive increases in backbone flexibility. Comparison of these results with recently published physicochemical stability and Fcγ receptor binding data with the same set of glycoproteins provide improved insights into correlations between glycan structure and these pharmaceutical properties...
May 8, 2018: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29748553/anticancer-activity-and-antibody-dependent-cell-mediated-cytotoxicity-of-novel-anti-nucleolin-antibodies
#19
Sofia Romano, Vera Moura, Sérgio Simões, João Nuno Moreira, João Gonçalves
Nucleolin arises as a relevant target for cancer therapy, as it is overexpressed at the surface of cancer and angiogenic endothelial cells thus enabling a dual cellular targeting strategy. Immunotherapeutic strategies, albeit of proven therapeutic relevance, have been scarcely explored against this target. Therefore, this work aimed at engineering an anti-nucleolin VHH-based antibody capable of triggering anticancer immune responses. Herein, anti-nucleolin VHHs have been generated upon grafting F3 peptide-derived nucleolin-binding sequences onto a VHH CDR1 or CDR3...
May 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29743371/roles-of-fc-domain-and-exudation-in-l2-antibody-mediated-protection-against-human-papillomavirus
#20
Joshua W Wang, Wai Hong Wu, Tsui-Chin Huang, Margaret Wong, Kihyuck Kwak, Keiko Ozato, Chien-Fu Hung, Richard B S Roden
To address how L2-specific antibodies prevent human papillomavirus (HPV) infection of the genital tract we generated neutralizing monoclonal antibodies (MAbs) WW1, a rat IgG2a that binds L2 residues 17-36 (like mouse MAb RG1), and JWW3, a mouse IgG1 derivative of Mab24 specific to L2 residues 58-64. By Western blot, WW1 recognized L2 of 29/34 HPV genotypes tested, compared to only 13/34 for RG1, and 25/34 for JWW3. WW1 IgG and (Fab')2 bound HPV16 pseudovirions similarly, however whole IgG provided better protection against HPV vaginal challenge...
May 9, 2018: Journal of Virology
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