Signal without noise: Practical antibody titration for platelet flow cytometry

Area of Science:

• Immunology
• Hematology
• Analytical Chemistry

Background:

• Platelet flow cytometry is vital for assessing platelet characteristics.
• Standardized antibody titration protocols are needed for reliable results.

Purpose of the Study:

• To provide practical methods for antibody titration in platelet flow cytometry.
• To optimize staining for both constitutive and inducible platelet markers.

Main Methods:

• Whole blood antibody titration strategies for various markers.
• Use of controls, consideration of coexpression, and subsaturating concentrations.
• Introduction of stain index and separation index for performance evaluation.

Main Results:

• Defined quantitative metrics for assessing staining quality.
• Addressed technical variables like combinatorial titration and spillover spreading.
• Recommended titration under final assay conditions for biological relevance.

Conclusions:

• Developed robust strategies for high-resolution platelet assays.
• Enhanced reproducibility and biological relevance in flow cytometry.
• Provided a foundation for automated and standardized platelet analysis.