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Detecting total immunoglobulins in diverse animal species with a novel split enzymatic assay
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Detecting total immunoglobulins in diverse animal species with a novel split enzymatic assay
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Journal Article
Detecting total immunoglobulins in diverse animal species with a novel split enzymatic assay
2019
Overview
Background
Total immunolobulin G concentration is a useful, albeit underutilized, diagnostic parameter for health assessments of non-domestic animal species, due to a lack of functional diagnostic tools. Traditional assays, including enzyme-linked immunosorbent assay or radial immunodiffusion, require development of specific reagents (e.g., polyclonal antisera and appropriate protocols) for each animal species, precluding wide and easy adoption in wildlife welfare. As an alternative, bacterial virulence factors able to bind IgGs in antigen-independent manner can be used. To further simplify the diagnostic procedure and increase the number of species recognized by an assay, in this study a recently developed Split Trehalase immunoglobulin assay (STIGA) with bIBPs as a sensing elements was used to detect antibodies in 29 species from 9 orders. Three bacterial immunoglobulin binding proteins (protein G, protein A and protein L) were incorporated into STIGA reagents to increase the number of species recognized.
Results
IgG concentrations were detected through glucose production and produced signals were categorized in 4 categories, from not active to strong signal. Activation was detected in almost all tested animal species, apart from birds. Incorporation of Protein G, Protein A and Protein L allowed detection of IgGs in 62, 15.5 and 6.9% of species with a strong signal, respectively. Assays combining 2 bacterial immunoglobulin binding proteins as sensing element generally gave poorer performance than assays with the same bacterial immunoglobulin binding proteins fused to both trehalase fragments.
Conclusions
STIGA assays have potential to be further developed into an easily adoptable diagnostic test for total amount of IgGs in almost any serum sample, independent of species.
Publisher
BioMed Central,BioMed Central Ltd,BMC
Subject
/ Antigens
/ Bacterial immunoglobulin binding proteins
/ birds
/ Enzyme-linked immunosorbent assay
/ Enzyme-Linked Immunosorbent Assay - methods
/ Enzymes
/ Glucose
/ Immunoglobulin G - isolation & purification
/ Medicine
/ Proteins
/ Reagents
/ STIGA
/ Veterinary Medicine/Veterinary Science
/ Wildlife
/ Zoology
