Comparison of basic lymphocyte phenotype results between a diagnostic and a research laboratory

Area of Science:

• Immunology
• Clinical Diagnostics
• HIV/AIDS Research

Background:

• Lymphocyte phenotyping is crucial for monitoring HIV-1 treatment efficacy.
• Antiretroviral therapy (ART) requires accurate T-cell subset monitoring.
• Comparing laboratory methodologies is essential for long-term study consistency.

Purpose of the Study:

• To compare T-cell subset quantification between a research and a diagnostic laboratory.
• To assess the impact of inter-laboratory variation on HIV-1 treatment monitoring.
• To evaluate the consistency of results for cluster of differentiation (CD)3, CD4, and CD8 T-cells.

Main Methods:

• Peripheral blood samples from 73 males (47 with HIV-1, 26 without) were analyzed.
• Flow cytometry (FACSCanto II) was used for CD3, CD4, and CD8 T-cell quantification.
• Bland-Altman analysis assessed agreement between two laboratories.

Main Results:

• High agreement was observed between the research and diagnostic laboratories.
• 69/73 (CD3), 71/73 (CD4), and 72/73 (CD8) results fell within acceptable limits.
• Mean differences were minimal, indicating strong concordance.

Conclusions:

• Laboratory agreement for T-cell subset quantification is strong.
• Minimal differences between laboratories using similar methods do not significantly affect long-term study outcomes.
• Consistent monitoring of HIV-1 patients on ART is feasible across different labs.