Identification and Immunophenotypic Characterization of Normal and Pathological Mast Cells

Area of Science:

• Immunology
• Cell Biology

Background:

• Mast cells (MCs) are key immune cells involved in allergic reactions and immune responses.
• Traditionally identified by morphology and staining, MCs are often present at low frequencies, making them difficult to study.
• Advancements in antibody technology enable new methods for MC analysis.

Purpose of the Study:

• To describe a protocol for mast cell immunophenotyping using fluorescence-based flow cytometry.
• To enable accurate quantification and characterization of mast cells, particularly rare populations.
• To adapt the method for studying human mast cells in body fluids and other tissues.

Main Methods:

• Utilizing fluorescence-based flow cytometry for cell analysis.
• Employing highly specific antibodies for mast cell identification and characterization.
• Focusing on human mast cells in body fluids, primarily bone marrow.

Main Results:

• Flow cytometry allows rapid analysis of thousands of events, identifying rare cells (1 in 10^6).
• Simultaneous characterization of multiple antigens at the single-cell level is achievable.
• The protocol is effective for studying mast cells in suspension, including rare populations.

Conclusions:

• Fluorescence-based flow cytometry is the method of choice for mast cell quantification and characterization.
• This technique significantly improves the study of rare mast cell populations.
• The described protocol is adaptable for mast cells from various tissues and species.