Interferon-gamma ELISPOT assay for the quantitative measurement of antigen-specific murine CD8+ T-cells

Area of Science:

• Immunology
• Cellular Biology
• Vaccinology

Background:

• Quantitative measurement of cellular immune responses is essential for screening new vaccines and immunotherapeutics.
• The enzyme-linked immunospot (ELISPOT) assay is a sensitive technique for detecting cytokine-producing cells at the single-cell level.
• ELISPOT assays are rapid, reproducible, and allow direct enumeration of low-frequency antigen-specific T-cells.

Purpose of the Study:

• To describe a detailed protocol for an interferon (IFN)-gamma ELISPOT method.
• To demonstrate the measurement of antigen-specific murine CD8+ T-cells using this technique.
• To highlight the utility of ELISPOT for monitoring CD8+ T-cell responses in various model systems.

Main Methods:

• Utilized spleen cells from peptide-primed mice as a source of CD8+ T-cells.
• Employed a ready-to-use IFN-gamma ELISPOT assay kit for assay facilitation.
• Detailed the step-by-step procedure for the IFN-gamma ELISPOT assay.

Main Results:

• Successfully demonstrated the utility of the IFN-gamma ELISPOT assay for enumerating antigen-specific CD8+ T-cells.
• The assay provides quantitative measurement of cellular immune responses at the single-cell level.
• The protocol is adaptable to other model systems for monitoring CD8+ T-cell responses.

Conclusions:

• The described IFN-gamma ELISPOT method is effective for quantifying antigen-specific murine CD8+ T-cells.
• This assay is a valuable tool for the effective screening of vaccines and immunotherapeutics.
• The protocol's adaptability makes it broadly applicable in immunological research.