Generation and characterization of polyclonal antibody against part of immunoglobulin constant heavy υ chain of goose.

Generation and characterization of polyclonal antibody against part of immunoglobulin constant heavy υ chain of goose. Monoclon Antib Immunodiagn Immunother. 2014 Aug;33(4):287-90 Authors: Zhao P, Guo Y, Ma B, Xing M, Wang J Abstract Immunoglobulin Y (abbreviated as IgY) is a type of immunoglobulin that is the major antibody in bird, reptile, and lungfish blood. IgY consists of two light (λ) and two heavy (υ) chains. In the present study, polyclonal antibody against IgYFc was generated and evaluated. rIgYCυ3/Cυ4 was expressed in Escherichia coli, purified and utilized to raise polyclonal antibody in rabbit. High affinity antisera were obtained, which successfully detected the antigen at a dilution of 1:204,800 for ELISA assay. The antibody can specifically recognize both rIgYCυ3/Cυ4 and native IgY by Western bolt analysis. Furthermore, the serum of Grus japonensis or immunoglobulin of chicken, duck, turkey, and silkie samples and dynamic changes of serum GoIgY after immunogenicity with GPV-VP3-virus-like particles (GPV-VP3-VLPs) can be detected with the anti-GoIgYFc polyclonal antibody. These results suggested that the antibody is valuable for the investigation of biochemical properties and biological functions of GoIgY. PMID: 25171010 [PubMed - indexed for MEDLINE]
Source: Monoclonal Antibodies in Immunodiagnosis and Immunotherapy - Category: Microbiology Tags: Monoclon Antib Immunodiagn Immunother Source Type: research

Related Links:

In this study, we investigated the immunostimulatory properties of bacterial ghosts (BG) as a novel approach to potentiate the host immunity against mycobacterial infection. BG are intact cytoplasm-free Escherichia coli envelopes and have been developed as bacterial vaccines and adjuvant/delivery system in cancer immunotherapy. However, BG have yet to be exploited as immunopotentiators in the context of infectious diseases. Here, we showed that BG are potent inducers of dendritic cells (DC), which led to enhanced T cell proliferation and differentiation into effector cells. BG also induced macrophage activation, which was ...
Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
Publication date: Available online 20 October 2019Source: Protein Expression and PurificationAuthor(s): Lei Jing, Juanjuan Liu, Dongxu Cui, Yuyin Li, Zhenxing Liu, Li Tao, Qing Zhao, Aipo DiaoAbstractAn affibody is a 58 amino acids peptide derived from the Z domain of staphylococcal protein A and generally applied in areas such as imaging diagnosis, clinical therapeutics and biotechnology research. To screen for an affibody targeting the immune checkpoint PD-L1, a combinatorial affibody library was generated in yeast using degenerate overlap PCR primers and In-fusion technology. Z-j1 and Z-j2 affibodies targeting the Ig-li...
Source: Protein Expression and Purification - Category: Biochemistry Source Type: research
acute;s A Abstract Der p 2 is one of the most important allergens from the house dust mite Dermatophagoides pteronyssinus Identification of human IgE Ab binding epitopes can be used for rational design of allergens with reduced IgE reactivity for therapy. Antigenic analysis of Der p 2 was performed by site-directed mutagenesis based on the x-ray crystal structure of the allergen in complex with a Fab from the murine IgG mAb 7A1 that binds an epitope overlapping with human IgE binding sites. Conformational changes upon Ab binding were confirmed by nuclear magnetic resonance using a 7A1-single-chain variable fragmen...
Source: Journal of Immunology - Category: Allergy & Immunology Authors: Tags: J Immunol Source Type: research
Abstract Previously, a ubiquinol‑cytochrome c reductase binding protein (UQCRB) homolog was identified in the house dust mite (HDM) species Dermatophagoides farinae (Der f) as a major allergen. In the present study, the immunodominant immunoglobulin E (IgE) epitope of the protein Der f 24 was investigated. Analysis of the homologous amino acid (aa) sequences in Der f and human UQCRB was performed. Four different recombinant Der f 24 and hybrid proteins formed by integrating Der f and human UQCRB sequences were expressed in Escherichia coli, purified using Ni‑NTA resins, and IgE‑binding activity was...
Source: International Journal of Molecular Medicine - Category: Molecular Biology Authors: Tags: Int J Mol Med Source Type: research
Conclusion: These findings can constitute a new point of view related to immunostimulation by nutrients, which may be considered one major preventive strategy by enhancing the natural defense system of the body. PMID: 31540438 [PubMed - in process]
Source: Medicina (Kaunas) - Category: Universities & Medical Training Authors: Tags: Medicina (Kaunas) Source Type: research
In conclusion, our data show how oncogenic and tumor-suppressive drivers of cellular senescence act to regulate surveillance processes that can be circumvented to enable SnCs to elude immune recognition but can be reversed by cell surface-targeted interventions to purge the SnCs that persist in vitro and in patients. Since eliminating SnCs can prevent tumor progression, delay the onset of degenerative diseases, and restore fitness; since NKG2D-Ls are not widely expressed in healthy human tissues and NKG2D-L shedding is an evasion mechanism also employed by tumor cells; and since increasing numbers of B cells express NKG2D ...
Source: Fight Aging! - Category: Research Authors: Tags: Newsletters Source Type: blogs
Construction and Screening of an Antigen-Derived Peptide Library Displayed on Yeast Cell Surface for CD4+ T Cell Epitope Identification. Methods Mol Biol. 2019;2024:213-234 Authors: Wen F, Smith MR, Zhao H Abstract Antigenic peptides (termed T cell epitopes) are assembled with major histocompatibility complex (MHC) molecules and presented on the surface of antigen-presenting cells (APCs) for T cell recognition. T cells engage these peptide-MHCs using T cell receptors (TCRs). Because T cell epitopes determine the specificity of a T cell immune response, their prediction and identification are impo...
Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
Conclusion: Results showed that the IgY-abrin immunotoxin had cytotoxic activity against CD133+ MGSCs and provides a novel approach for the immunotherapy of glioblastoma. PMID: 31275378 [PubMed]
Source: Journal of Oncology - Category: Cancer & Oncology Tags: J Oncol Source Type: research
ConclusionsAn in silico approach is used to generate a PV without targeting disulfide bonds, T cell epitopes, or previously reported IgE epitopes of Pru p 3. PV is strongly hypoallergenic while structurally stable and immunogenic, thus representing a promising candidate for peach allergen immunotherapy.
Source: Molecular Nutrition and Food Research - Category: Food Science Authors: Tags: Research Article Source Type: research
ConclusionsAnin silico approach was used to generate a PV without targeting disulfide bonds, T cell epitopes or previously reported IgE epitopes of Pru p 3. PV was strongly hypoallergenic while structurally stable and immunogenic thus representing a promising candidate for peach allergen immunotherapy.This article is protected by copyright. All rights reserved
Source: Molecular Nutrition and Food Research - Category: Food Science Authors: Tags: Research Article Source Type: research
More News: Gastroenteritis | Immunotherapy | Microbiology | Middle East Health | Study