Interlaboratory evaluation of LC-MS-based biomarker assays.

Area of Science:

• Biomarker discovery and validation
• Analytical chemistry
• Clinical diagnostics

Background:

• Biomarker assay validation is critical for drug development and clinical use.
• Interlaboratory reproducibility ensures reliable data comparison across research centers.

Purpose of the Study:

• To review interlaboratory studies of quantitative liquid chromatography-mass spectrometry (LC-MS)-based biomarker assays.
• To identify trends, challenges, and methods for improving assay validation and data normalization.

Main Methods:

• Literature review of interlaboratory studies using reference standards for calibration.
• Analysis of reported trends in biomarker assay validation parameters.
• Discussion of normalization strategies for interlaboratory biomarker data.

Main Results:

• Evaluation of analytical validation parameters in interlaboratory studies is often limited.
• Limited research exists on full parameter evaluation in interlaboratory settings.
• Some reports offer methods to mitigate interlaboratory variations in biomarker assay data.

Conclusions:

• Method validation across laboratories is crucial for reducing interlaboratory differences.
• Standardized validation enhances the reliability of biomarker responses.
• Further research is needed to fully address parameter evaluation in interlaboratory studies.