Bridging variability: toward standardized and harmonized multiplex bead-based flow cytometric cytokine assays

Area of Science:

• Immunology
• Clinical Laboratory Science
• Biotechnology

Background:

• Cytokine profiling is vital for assessing immune status and treatment efficacy in clinical settings.
• Multiplex bead-based flow cytometry provides sensitive, specific, and high-throughput cytokine quantification.
• Significant variability in these assays hinders reproducibility and clinical adoption.

Purpose of the Study:

• To review methodologies and sources of variability in multiplex bead-based flow cytometric cytokine assays.
• To highlight advances in assay standardization and harmonization.
• To propose collaborative frameworks for improving assay reliability.

Main Methods:

• Comprehensive literature review of multiplex bead-based flow cytometry for cytokine analysis.
• Identification and analysis of key procedural steps contributing to assay variability.
• Examination of current standardization and harmonization strategies.

Main Results:

• Identified major sources of intra- and inter-laboratory variability in cytokine assays.
• Summarized recent advancements in standardizing multiplex flow cytometry techniques.
• Outlined strategic frameworks for collaborative improvement.

Conclusions:

• Standardization and harmonization of multiplex cytokine assays are essential for clinical utility.
• Collaborative efforts between labs, manufacturers, and regulators can overcome variability challenges.
• Implementing standardized protocols will enhance assay reliability and enable wider clinical application.