Sequential ELISA to profile multiple cytokines from small volumes

Area of Science:

• Biomedical Science
• Immunology
• Assay Development

Background:

• Enzyme-linked immunosorbent assay (ELISA) is crucial for measuring inflammatory cytokines.
• Limited blood volume in mouse models restricts the number of cytokines measurable by traditional ELISA.
• Repeated sampling is often necessary to track inflammatory processes, further straining limited blood volumes.

Purpose of the Study:

• To develop a sequential ELISA protocol to increase the number of measurable cytokines from small plasma volumes.
• To enable multiple cytokine measurements from a single blood sample, reducing the need for repeated collections.
• To provide a cost-effective alternative to advanced methods for cytokine analysis.

Main Methods:

• Implementation of a sequential ELISA protocol allowing sample reuse.
• Assaying up to fifteen cytokines in five consecutive cycles from an initial 20 µL plasma volume.
• Prioritizing unstable cytokines for initial assay cycles to prevent sample deterioration.

Main Results:

• Successful measurement of up to fifteen cytokines from a single, small plasma sample.
• Demonstrated no inter-assay interference or sample degradation across five consecutive cycles.
• Validated the protocol using commercially available antibody pairs.

Conclusions:

• The sequential ELISA protocol significantly enhances cytokine analysis efficiency from limited sample volumes.
• This method offers a cost-effective and practical alternative for monitoring inflammatory processes in research settings.
• The protocol shows potential for adaptation to measure other inflammation-related targets.