Rapid isolation of antigen-specific antibody-secreting cells using a chip-based immunospot array

Area of Science:

• Immunology
• Biotechnology
• Cell Biology

Background:

• Isolating antigen-specific antibody-secreting cells (ASCs) is crucial for therapeutic antibody development.
• Existing methods like ELISPOT have limitations in cell recovery and retrieval for further analysis.
• A need exists for rapid, efficient, and high-throughput methods for single-cell ASC detection and recovery.

Purpose of the Study:

• To develop and validate a novel microwell array chip system for isolating antigen-specific ASCs.
• To enable high-throughput, single-cell detection and retrieval of antibody-secreting cells.
• To provide a method with sensitivity and specificity comparable to ELISPOT but with improved cell recovery.

Main Methods:

• Arraying large populations of lymphoid cells from human peripheral blood onto microwell array chips.
• Detecting spots corresponding to secreted antibodies on a single-cell basis.
• Utilizing a protocol completed in under 7 hours, including cell culture.

Main Results:

• The microwell array chip system allows for rapid and efficient detection and retrieval of antigen-specific ASCs.
• The system supports high-throughput analysis, accommodating up to 234,000 individual cells.
• Sensitivity and specificity are comparable to enzyme-linked immunospot (ELISPOT), with enhanced ASC recovery.

Conclusions:

• The developed microwell array chip method offers a significant advancement for isolating antigen-specific ASCs.
• This technology facilitates the production of antigen-specific human monoclonal antibodies.
• The method is versatile, applicable to detecting other secreted molecules like cytokines, and useful for cell analysis and clinical diagnosis.