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Enzyme-linked Immunospot Assay (ELISPOT): Quantification of Th-1 Cellular Immune Responses Against Microbial Antigens
Published on: November 24, 2010
T-cell epitope mapping using the ELISPOT approach
Donald D Anthony1, Paul V Lehmann
1Department of Medicine and Department of Pathology, Case Western Reserve University, Biomedical Research Building 929, 10900 Euclid Avenue, Cleveland, OH 44106, USA.
Insights
The Enzyme-Linked ImmunoSpot (ELISPOT) assay measures T-cell responses directly ex vivo. This method is valuable for immune monitoring and epitope mapping due to its ability to analyze many variables simultaneously.
Area of Science:
- Immunology
- Cellular Immunology
Background:
- The Enzyme-Linked ImmunoSpot (ELISPOT) assay is a powerful technique for quantifying antigen-specific immune responses.
- It is particularly adept at measuring the clonal size and effector function of rare T-cell populations.
- Its direct ex vivo application and minimal culture requirements make it suitable for clinical diagnostics.
Purpose of the Study:
- To detail the rationale and methodology for performing T-cell epitope mapping using ELISPOT analysis.
- To provide practical hints for optimizing ELISPOT assays.
- To review representative results from ELISPOT-based epitope mapping.
Main Methods:
- Performing ELISPOT assays on fresh or cryopreserved samples with short culture times (<24h).
- Utilizing simultaneous analysis of hundreds of variables from single tissue specimens.
- Applying ELISPOT for direct ex vivo immune diagnostic monitoring.
Main Results:
- Demonstrated the utility of ELISPOT for assessing T-cell responses.
- Highlighted the assay's capability in determining clonal size and effector function.
- Showcased the simultaneous analysis of multiple variables from limited samples.
Conclusions:
- The ELISPOT assay is a versatile and effective tool for T-cell epitope mapping and immune monitoring.
- Its ability to analyze low-frequency T-cell populations directly ex vivo is a significant advantage.
- The described methodology and insights facilitate the application of ELISPOT in research and diagnostics.
Abstract:
The ELISPOT assay is particularly well suited to measure both clonal size and effector function of low-frequency antigen-specific T-cell populations directly ex vivo. Typically, an ELISPOT assay is performed with a freshly obtained sample (or cryopreserved sample) using less than 24h of culture. Additionally, this assay allows for the simultaneous analysis of hundreds of variables in parallel from a single tissue specimen. Because of these capabilities, this assay has found widespread use in the context of direct ex vivo immune diagnostic monitoring in humans. Herein we describe the rationale, methodology, and useful hints for performing T-cell epitope mapping using ELISPOT analysis, and review typical results of such an analysis.
