Elisa Antibody Response
Elisa Antibody Response - Related Videos
10:06
The ELISA Method
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2023
An enzyme-linked immunosorbent assay (ELISA) is typically performed to detect the presence and/or amount of a target protein of interest within an experimental sample. Detection of the target protein is made possible by antibodies, which make the ELISA an immunoassay. Through a series of incubation and washing steps, these antibodies, which are frequently linked, or conjugated, to an enzyme, will detect protein coating the bottom of a well on a microtiter plate. When exposed to a substrate,...
14:48
Conversion of a Capture ELISA to a Luminex xMAP Assay using a Multiplex Antibody Screening Method
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Cited by 53 •
2012
An ELISA can be easily converted to a Luminex xMAP assay and, through the benefits of multiplexing, several antibodies can be screened simultaneously to identify an optimum antibody pair, resulting in increased sensitivity and dynamic range, while reducing assay cost.
14:22
ELISA Assays: Indirect, Sandwich, and Competitive
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2023
Source: Whitney Swanson1,2, Frances V. Sjaastad2,3, and Thomas S. Griffith1,2,3,4 1 Department of Urology, University of Minnesota, Minneapolis, MN 55455 2 Center for Immunology, University of Minnesota, Minneapolis, MN 55455 3 Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455 4 Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455 Enzyme-linked immunosorbent assay (ELISA) is frequently used to measure the presence...
05:22
A Multiplex Serological Assay for the Detection of Antibody Responses to Arboviruses
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2025
Multiplex fluorescence immunoassays are becoming a reference for serology testing. Their application, however, is limited by the complexity and time-consuming bead-analyte coupling processes. This report presents a semi-automated, reproducible multiplex microsphere bead coupling protocol that is comparable to the standard method while considerably reducing time to results.
05:05
In Vivo Activation of Peritoneal Macrophages in Response to Antibodies in a Murine Model
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2025
This video demonstrates the activation of a mouse's peritoneal macrophages using intravenous immunoglobulin and bacterial lipopolysaccharide. The co-stimulation activates the peritoneal macrophages into anti-inflammatory macrophages possessing immune regulatory activity.
FAQs
Immobilizing the antigen creates a fixed target that can capture antibodies present in the serum sample. This arrangement allows antigen-specific binding to occur on the plate before the detection step begins. In infection and immunology studies, the selected antigen determines which antibody response the assay measures and helps connect the observed signal with immune recognition of that target.
The secondary antibody binds to antibodies that have already attached to the immobilized antigen. Its linked enzyme remains associated with those bound antibodies and reacts with an added substrate, producing a color change. Because the color develops through this enzyme-substrate reaction, the assay converts antibody binding into a laboratory signal that can be measured under controlled conditions.
Signal intensity reflects the amount of antibody bound to the antigen when assay conditions are controlled. The relationship depends on the sequence of antigen binding, serum exposure, secondary-antibody detection, and substrate addition. Consequently, researchers interpret stronger or weaker signals as differences in bound antibody rather than as a direct measurement of every feature of the immune response.
The assay provides evidence that the immune system has recognized a specified antigen, allowing researchers to investigate exposure or infection and to evaluate responses after vaccination. It also supports broader studies of immune protection. Its value comes from connecting antigen-specific antibody measurements with defined questions about infection status, vaccination, or protective immunity.
A typical indirect ELISA workflow begins by placing antigen on a plate, followed by adding patient serum so matching antibodies can bind. An enzyme-linked secondary antibody is then added to detect those bound antibodies, and substrate produces the color signal. The resulting intensity is measured under controlled conditions to estimate the amount of bound antibody.
The core materials are an antigen-coated plate, a biological sample such as patient serum, an antigen-specific antibody response in that sample, an enzyme-linked secondary antibody, and a substrate for color development. Each component has a distinct role: the antigen captures relevant antibodies, the secondary antibody detects them, and the substrate generates the observable readout.
Because samples can be examined for antibodies directed against a defined antigen, ELISA can contribute to studies of immune recognition across groups or populations. In epidemiology, these measurements help investigate patterns related to exposure and infection. The resulting antibody data can therefore support serological assessment alongside broader analyses of infectious disease occurrence.
Vaccination studies can use antigen-specific antibody measurements to examine whether immunization is associated with a detectable immune response. ELISA supplies a quantitative signal related to bound antibody under controlled conditions, making it useful for evaluating responses across samples. In immunology and infection research, this information contributes to broader assessments of whether vaccination may support protective immunity.