Evaluation of a universal template for single-platform absolute T-lymphocyte subset enumeration

Area of Science:

• Immunology
• Clinical Laboratory Science
• Flow Cytometry

Background:

• Accurate enumeration of T-lymphocyte subsets is crucial for monitoring immune status, particularly in HIV/AIDS management.
• Previous methods for T-lymphocyte subset analysis often involved complex, multi-step procedures.
• Standardization of flow cytometry techniques is essential for reproducible and reliable laboratory results.

Purpose of the Study:

• To evaluate a universal protocol for single-platform absolute T-lymphocyte subset analysis.
• To assess the feasibility and effectiveness of this protocol in a multicenter setting.
• To determine if a standardized approach can accommodate variations in flow cytometers and reagents.

Main Methods:

• A multicenter study involving Canadian HIV Trials Network (CTN) laboratories was conducted over two years.
• Participants utilized their own flow cytometers and reagents for whole blood labeling and lysis.
• Single-platform absolute T-lymphocyte subset enumerations were performed on fresh and stabilized blood products using TruCount and Flow-Count microfluorospheres.

Main Results:

• The universal protocol was successfully implemented across multiple Canadian laboratories.
• Consistent and reliable absolute T-lymphocyte subset counts were achieved despite variations in equipment and reagents.
• The use of commercially available microfluorospheres facilitated accurate enumeration.

Conclusions:

• The application of a universal template for single-platform T-lymphocyte subset analysis offers a generic and adaptable approach.
• This standardized method is suitable for a wide range of immunophenotyping settings within clinical laboratories.
• The protocol enhances reproducibility and comparability of T-lymphocyte subset data across different sites.