Search results for: HIV1-RT antibody, Monoclonal Antibodies, Host Mouse, Isotype IgG1
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An engineered bispecific DNA-encoded IgG antibody protects against Pseudomonas aeruginosa in a pneumonia challenge model.The impact of broad-spectrum antibiotics on antimicrobial resistance and disruption of the beneficial microbiome compels the urgent investigation of bacteria-specific approaches such as antibody-based strategies. Among these, DNA-delivered monoclonal antibodies (DMAbs), produced by muscle cells in vivo, potentially allow the prevention or treatment of bacterial infections circumventing some of the hurdles of protein IgG delivery. Here, we optimize DNA-delivered monoclonal antibodies consisting of two potent human IgG clones, including a non-natural bispecific IgG1 candidate, targeting Pseudomonas aeruginosa. The DNA-delivered monoclonal antibodies exhibit indistinguishable potency compared to bioprocessed IgG and protect against lethal pneumonia in mice. The DNA-delivered monoclonal antibodies decrease bacterial colonization of organs and exhibit enhanced adjunctive activity in combination with antibiotics. These studies support DNA-delivered monoclonal antibodies delivery as a potential strategy to augment the host immune response to prevent serious bacterial infections, and represent a significant advancement toward broader practical delivery of monoclonal antibody immunotherapeutics for additional infectious pathogens.DNA-delivered monoclonal antibodies (DMAbs) can be produced by muscle cells in vivo, potentially allowing prevention or treatment of infectious diseases. Here, the authors show that two DMAbs targeting Pseudomonas aeruginosa proteins confer protection against lethal pneumonia in mice.
2919 related Products with: An engineered bispecific DNA-encoded IgG antibody protects against Pseudomonas aeruginosa in a pneumonia challenge model.Mouse Anti P. aeruginosa Mouse Anti P.aeruginosa s Mouse Anti P.aeruginosa s Interleukin-34 IL34 (N-t Interleukin-34 IL34 anti CRC3 CD3 (bispecific) Cl HIV1 integrase antibody, Chlamydia pneumoniae anti Rabbit Anti-NOS-2 iNOS Po Rabbit Anti-NOS-2 iNOS Po Rabbit Anti-NOS-2 iNOS Po Rabbit Anti-NOS-2 iNOS Po
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A fully humanized IgG-like bispecific antibody for effective dual targeting of CXCR3 and CCR6.Chemokines and their receptors are pivotal for the trafficking of leukocytes during immune responses, and host defense. However, immune cell migration also contributes to a wide variety of autoimmune and chronic inflammatory diseases. Compelling evidence suggests that both CXCR3 and CCR6 chemokine receptors play crucial roles in the migration of pathological Th1 and Th17 cells during the course of certain inflammatory diseases. The use of two or more receptors by pathogenic cells may explain why targeting of individual receptors has proven disappointing in the clinic. We therefore hypothesized that simultaneous targeting of both CXCR3 and CCR6 with a bispecific antibody (BsAb) might result in decreased chemotaxis and/or specific depletion of pro-inflammatory T cell subsets. In this study, we designed and characterized a fully humanized BsAb. We show that the BsAb binds to both chemokine receptors, as demonstrated by Flow Cytometry and Surface Plasmon Resonance analysis. Furthermore, we demonstrate that the BsAb effectively blocks cell chemotaxis and induces specific antibody-dependent cell-mediated cytotoxicity (ADCC) in vitro. Therefore, we propose that dual targeting of CXCR3 and CCR6 with a fully humanized BsAb may display a potent interventional approach for the treatment of inflammatory and autoimmune diseases.
2863 related Products with: A fully humanized IgG-like bispecific antibody for effective dual targeting of CXCR3 and CCR6.RABBIT ANTI GSK3 BETA (pS Rabbit Anti-CXCR3 CD183 P Rabbit Anti-CXCR3 CD183 P Rabbit Anti-CXCR3 CD183 P Rabbit Anti-CXCR3 CD183 P Rabbit Anti-CXCR3 CD183 P Rabbit Anti-CXCR3 CD183 P B-Phycoerythrin antibody 2-Amino Benzimidazole Su 2-Amino Benzimidazole Su Interleukin-34 IL34 (N-t Interleukin-34 IL34 anti
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Comparison of antibody responses against Mycobacterium tuberculosis antigen Rv0679c in tuberculosis patients from the endemic and non-endemic regions of the Beijing genotype: a case control study.Strains of the Beijing genotype of Mycobacterium tuberculosis (MTB) are reportedly associated with the virulence of tuberculosis (TB) infection, unfavorable outcomes of anti-TB treatment, and the global TB pandemic. Rv0679c, a hypothetical membrane protein related to host cell invasion, has a Beijing genotype-specific mutation at residue 142 (Asn142Lys). Antigenicity differences between Rv0679c-Asn142 (N-type) and Rv0679c-Lys142 (K-type) have been previously observed in mice antigen-antibody responses. However, the immune response to Rv0679c in humans remains unknown. Therefore, we aimed to investigate the anti-Rv0679c immune response in TB patients from the endemic and non-endemic regions of the Beijing MTB genotype.
2600 related Products with: Comparison of antibody responses against Mycobacterium tuberculosis antigen Rv0679c in tuberculosis patients from the endemic and non-endemic regions of the Beijing genotype: a case control study.Mycobacterium tuberculosi Rabbit Polyclonal to Myco FDA Standard Frozen Tissu FDA Standard Frozen Tissu FDA Standard Frozen Tissu FDA Standard Frozen Tissu FDA Standard Frozen Tissu FDA Standard Frozen Tissu FDA Standard Frozen Tissu Normal rat multiple organ Normal rat multiple organ Normal rat multiple organ
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Enhanced humoral and CD8+ T cell immunity in mice vaccinated by DNA vaccine against human respiratory syncytial virus through targeting the encoded F protein to dendritic cells.Human respiratory syncytial virus (RSV) is the most important cause of serious lower respiratory tract infection in infants, the elderly, and the immunocompromised population. There is no licensed vaccine against RSV until now. It has been reported that targeting antigen to DEC205, a phagocytosis receptor on dendritic cells (DCs), could induce enhanced CD4+ and CD8+ T cell responses in mice. To develop RSV DNA vaccine and target the encoded antigen protein to DCs, the ectodomain of fusion glycoprotein (sF, amino acids: 23-524) of RSV was fused with anti-DEC205 single-chain Fv fragment (scDEC) and designated scDECF. Following successful expression from the recombinant plasmid of pVAX1/scDECF, the recombinant protein of scDECF was found capable of specifically binding to DEC205 receptor on CHOmDEC205 cells, and facilitating uptake of RSV F by DC2.4 cells in vitro. Furthermore, the higher levels of RSV-specific IgG antibody responses and neutralization antibody titers, as well as RSV F-specific CD8+ T cell responses were induced in mice immunized intramuscularly by pVAX1/scDECF than by the control plasmid of pVAX1/scISOF encoding sF protein fused with isotype matched control single-chain Fv fragment (scISO). Compared with pVAX1/scISOF, both the ratio of IgG2a/IgG1, >1, and the enhanced IFN-γ cytokine were induced in mice following pVAX1/scDECF immunization, which exhibited a Th1 dominant response in pVAX1/scDECF vaccinated mice. Notably, the elevated efficiency of RSV F protein bound by DCs in vivo could also be observed in mice inoculated by pVAX1/scDECF. Collectively, these results demonstrate the enhanced IgG and CD8+ T cell immune responses have been induced successfully by DNA vaccine against RSV by targeting F antigen to DCs via the DEC205 receptor, and this DC-targeting vaccine strategy merits further investigation.
2625 related Products with: Enhanced humoral and CD8+ T cell immunity in mice vaccinated by DNA vaccine against human respiratory syncytial virus through targeting the encoded F protein to dendritic cells.Anti C Reactive Protein A Human Tonsil Microvascula Human Dnak (HSP70) His ta FIV Core Ag, recombinant Macrophage Colony Stimula Macrophage Colony Stimula Recombinant Human OPG TNF Recombinant Human OPG TNF Recombinant Human THPO [f Cell Meter™ Fluorimetri Cell Meter™ Fluorimetri thymic dendritic cell-der
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Enhanced Protective Immunogenicity of Homodimeric Borrelia burgdorferi Outer Surface Protein C.Lyme borreliosis is caused by tick-transmitted spirochetes of the Borrelia burgdorferi sensu lato group and is the most common vector-borne disease in the United States and Europe. Outer surface protein C (OspC) is a 23-kDa outer surface lipoprotein expressed during spirochete transmission from the tick to the vertebrate host. In a previous study, we found that immunization with a recombinant disulfide-bridged dimeric form of OspC (D-OspC) stimulates increased antibody responses relative to immunization with commonly employed monomeric OspC. Here, we report that mice immunized with dimeric OspC proteins also exhibited enhanced protection against infection with the cognate B. burgdorferi strain. Mice were protected by four immunizations containing as little as 100 ng of dimeric OspC, suggesting that this form of the protein can induce protective immunity within a dose range reasonable for a human or veterinary vaccine. In contrast, monomeric OspC was only partially protective at much higher doses. IgG subclass analysis revealed that D-OspC-immunized animals mainly possessed anti-OspC-IgG1. In contrast, infected animals develop anti-OspC restricted to the IgG3 isotype. A subset of antibodies generated by dimeric OspC immunization did not recognize the monomeric variant, indicating that unique epitopes exist on the dimeric form. Moreover, monoclonal antibodies that recognized only dimeric OspC protected mice from B. burgdorferi challenge, whereas another monoclonal that recognized both immunogens was not protective. These studies suggest that this dimeric OspC presents distinctive epitopes that generate antibodies protective against B. burgdorferi infection and could be a useful vaccine component.
2292 related Products with: Enhanced Protective Immunogenicity of Homodimeric Borrelia burgdorferi Outer Surface Protein C.MOUSE ANTI BORRELIA BURGD NATIVE BORRELIA BURGDORFE MOUSE ANTI BORRELIA BURGD IgG,Borrelia burgdorferi VDAC1 - Rabbit polyclonal RABBIT ANTI BORRELIA BURG RABBIT ANTI BORRELIA BURG RABBIT ANTI BORRELIA BURG Borrelia burgdorferi gari Borrelia burgdorferi sens Borrelia burgdorferi sens MOUSE ANTI BORRELIA BURGD
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Immunoglobulin G elution in protein A chromatography employing the method of chromatofocusing for reducing the co-elution of impurities.Purification processes for monoclonal Immunoglobulin G (IgG) typically employ protein A chromatography as a capture step to remove most of the impurities. One major concern of the post-protein A chromatography processes is the co-elution of some of the host cell proteins (HCPs) with IgG in the capture step. In this work, a novel method for IgG elution in protein A chromatography that reduces the co-elution of HCPs is presented where a two-step pH gradient is self-formed inside a protein A chromatography column. The complexities involved in using an internally produced pH gradient in a protein A chromatography column employing adsorbed buffering species are discussed though equation-based modeling. Under the conditions employed, ELISA assays show a 60% reduction in the HCPs co-eluting with the IgG fraction when using the method as compared to conventional protein A elution without affecting the IgG yield. Evidence is also obtained which indicates that the amount of leached protein A present in free solution in the purified product is reduced by the new method. Biotechnol. Bioeng. 2017;114: 154-162. © 2016 Wiley Periodicals, Inc.
2810 related Products with: Immunoglobulin G elution in protein A chromatography employing the method of chromatofocusing for reducing the co-elution of impurities.Multiple organ tumor tiss MID1 interacting G12-like Thermal Shaker with cooli Rabbit Anti-APIP Apaf1 In Rabbit Anti-TNIP2 ABIN2 T Rabbit Anti-Cell death in Rabbit Anti-G protein alp GNAS & ADCY2 Protein Prot GAB1 & CRKL Protein Prote GRAP2 & CSF1R Protein Pro GSK3B & CTNNB1 Protein Pr GRAP2 & ERBB2 Protein Pro
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Cytosine-Phosphorothionate-Guanine Oligodeoxynucleotides Exacerbates Hemophagocytosis by Inducing Tumor Necrosis Factor-Alpha Production in Mice after Bone Marrow Transplantation.Hemophagocytic syndrome (HPS) is frequently associated with hematopoietic stem cell transplantation and is treated with some benefit derived from TNF-α inhibitors. However, the mechanisms of how HPS occurs and how a TNF-α inhibitor exerts some benefit to HPS management have remained unclear. We evaluated the effect of toll-like receptor (TLR) ligands, especially focusing on cytosine-phosphorothionate-guanine oligodeoxynucleotide (CpG), a TLR9 ligand, on HPS in mice that underwent transplantation with syngeneic or allogeneic bone marrow (BM) cells (Syn-BMT, Allo-BMT), or with allogeneic BM cells plus splenocytes to promote graft-versus-host disease (GVHD mice). Hemophagocytosis was a common feature early after all BMT, but it subsided in Syn-BMT and Allo-BMT mice. In GVHD mice, however, hemophagocytosis persisted and was accompanied by upregulated production of IFN-γ but not TNF-α, and it was suppressed by blockade of IFN-γ but not TNF-α. A single injection of the TLR9 ligand CpG promoted HPS in all BMT mice and was lethal in GVHD mice, accompanied by greatly upregulated production of TNF-α, IL-6, and IFN-γ. Blocking of TNF-α, but not IL-6 or IFN-γ, suppressed CpG-induced HPS in all BMT mice and rescued GVHD mice from CpG-induced mortality. Thus, TLR9 signaling mediates TNF-α-driven HPS in BMT mice and is effectively treated through TNF-α inhibition.
1278 related Products with: Cytosine-Phosphorothionate-Guanine Oligodeoxynucleotides Exacerbates Hemophagocytosis by Inducing Tumor Necrosis Factor-Alpha Production in Mice after Bone Marrow Transplantation.ELISA Kit for Tumor Necr Human Tumor Necrosis Fact TNFRSF1B - Goat polyclona Mouse Tumor Necrosis Fact Rat Tumor Necrosis Factor Bone marrow tumor and adj ELISA Kit for Tumor Necro Mouse Tumor Necrosis Fact Human Tumor Necrosis Fact Tumor necrosis factor (TN Bone marrow tumor and nor Human Tumor Necrosis Fact
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Enhanced performance of an innovative dengue IgG/IgM rapid diagnostic test using an anti-dengue EDI monoclonal antibody and dengue virus antigen.High levels of anti-dengue IgM or IgG can be detected using numerous rapid diagnostic tests (RDTs). However, the sensitivity and specificity of these tests are reduced by changes in envelope glycoprotein antigenicity that inevitably occur in limited expression systems. A novel RDT was designed to enhance diagnostic sensitivity. Dengue viruses cultured in animal cells were used as antigens to retain the native viral coat protein. Monoclonal antibodies (mAbs) were then developed, for the first time, against domain I of envelope glycoprotein (EDI). The anti-dengue EDI mAb was employed as a capturer, and EDII and EDIII, which are mainly involved in the induction of neutralizing antibodies in patients, were fully available to bind to anti-dengue IgM or IgG in patients. A one-way automatic blood separation device prevented reverse migration of plasma and maximize the capture of anti-dengue antibodies at the test lines. A clinical evaluation in the field proved that the novel RDT (sensitivities of 96.5% and 96.7% for anti-dengue IgM and IgG) is more effective in detecting anti-dengue antibodies than two major commercial tests (sensitivities of 54.8% and 82% for SD BIOLINE; 50.4% and 75.3% for PanBio). The innovative format of RDT can be applied to other infectious viral diseases.
2533 related Products with: Enhanced performance of an innovative dengue IgG/IgM rapid diagnostic test using an anti-dengue EDI monoclonal antibody and dengue virus antigen.Anti-Dengue Virus Antibod Dengue Type 1 antibody, M Dengue Type 2 antibody, M Dengue Type 3 antibody, M Dengue Type 4 antibody, M Dengue antibody (Complex) Recombinant Dengue Virus Mouse Anti-Dengue Virus A Mouse Anti-Dengue Virus A Mouse Anti-Dengue Virus T Anti-Infectious Pancreati Anti-Infectious Pancreati
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An Anti-Influenza Virus Antibody Inhibits Viral Infection by Reducing Nucleus Entry of Influenza Nucleoprotein.To date, four main mechanisms mediating inhibition of influenza infection by anti-hemagglutinin antibodies have been reported. Anti-globular-head-domain antibodies block either influenza virus receptor binding to the host cell or progeny virion release from the host cell. Anti-stem region antibodies hinder the membrane fusion process or induce antibody-dependent cytotoxicity to infected cells. In this study we identified a human monoclonal IgG1 antibody (CT302), which does not inhibit both the receptor binding and the membrane fusion process but efficiently reduced the nucleus entry of viral nucleoprotein suggesting a novel inhibition mechanism of viral infection by antibody. This antibody binds to the subtype-H3 hemagglutinin globular head domain of group-2 influenza viruses circulating throughout the population between 1997 and 2007.
2812 related Products with: An Anti-Influenza Virus Antibody Inhibits Viral Infection by Reducing Nucleus Entry of Influenza Nucleoprotein.Mouse Anti-Influenza A Vi Mouse Anti-Influenza A Vi Mouse Anti-Influenza B Vi Mouse Anti-Influenza B Vi Mouse Anti-Influenza A Vi Mouse Anti-Influenza A Vi Mouse Anti-Influenza B Vi Mouse Anti-Influenza B Vi Mouse Anti-Influenza B Vi Mouse Anti-Influenza A Nu HA (Influenza A Virus Hem Mouse Anti-Influenza A Nu
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Contribution of Fcγ receptors to human respiratory syncytial virus pathogenesis and the impairment of T-cell activation by dendritic cells.Human respiratory syncytial virus (hRSV) is the leading cause of infant hospitalization related to respiratory disease. Infection with hRSV produces abundant infiltration of immune cells into the airways, which combined with an exacerbated pro-inflammatory immune response can lead to significant damage to the lungs. Human RSV re-infection is extremely frequent, suggesting that this virus may have evolved molecular mechanisms that interfere with host adaptive immunity. Infection with hRSV can be reduced by administering a humanized neutralizing antibody against the virus fusion protein in high-risk infants. Although neutralizing antibodies against hRSV effectively block the infection of airway epithelial cells, here we show that both, bone marrow-derived dendritic cells (DCs) and lung DCs undergo infection with IgG-coated virus (hRSV-IC), albeit abortive. Yet, this is enough to negatively modulate DC function. We observed that such a process is mediated by Fcγ receptors (FcγRs) expressed on the surface of DCs. Remarkably, we also observed that in the absence of hRSV-specific antibodies FcγRIII knockout mice displayed significantly less cellular infiltration in the lungs after hRSV infection, compared with wild-type mice, suggesting a potentially harmful, IgG-independent role for this receptor in hRSV disease. Our findings support the notion that FcγRs can contribute significantly to the modulation of DC function by hRSV and hRSV-IC. Further, we provide evidence for an involvement of FcγRIII in the development of hRSV pathogenesis.
1154 related Products with: Contribution of Fcγ receptors to human respiratory syncytial virus pathogenesis and the impairment of T-cell activation by dendritic cells.Human Tonsil Microvascula Mouse Anti-Human Dendriti Mouse Anti-Human Follicul Mouse Anti-Human Follicul Mouse Anti-Human Follicul Mouse Anti-Human Follicul Anti C Reactive Protein A Epidermal Growth Factor ( Epidermal Growth Factor ( Macrophage Colony Stimula Macrophage Colony Stimula glial cells missing homol
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