Multicenter evaluation of quantification methods for plasma human immunodeficiency virus type 1 RNA

Area of Science:

• Virology
• Immunology
• Clinical Diagnostics

Background:

• Accurate quantification of human immunodeficiency virus type 1 (HIV-1) RNA is crucial for monitoring disease progression and treatment efficacy.
• Existing methods for HIV-1 RNA quantification varied in sample volume, preparation, amplification, and detection techniques.

Purpose of the Study:

• To evaluate and compare the performance of six different procedures for quantifying plasma HIV-1 RNA.
• To assess the reproducibility and sensitivity of these assays for use in clinical settings.

Main Methods:

• Nine laboratories evaluated six distinct HIV-1 RNA quantification procedures.
• Coded samples, including a 10-fold dilution series of spiked plasma and patient samples, were tested.
• Assays were compared based on sample volume, preparation, amplification, and detection methods.

Main Results:

• All six procedures correctly ranked HIV-1 RNA levels in dilution series.
• Several procedures demonstrated sufficient reproducibility, with a 4-fold change considered significant.
• HIV-1 RNA levels correlated with proviral DNA and inversely with CD4 cell counts.
• HIV-1 RNA assays showed higher sensitivity than plasma viremia and p24 antigen assays.

Conclusions:

• Multiple quantitative HIV-1 RNA assays are sufficiently reproducible and sensitive for clinical use.
• These validated assays are ready for implementation in clinical trials for HIV-1 management.
• Quantitative HIV-1 RNA measurement provides valuable insights into disease status and treatment response.