Adventures in critical reagent lot changes in ligand-binding assays: redevelopment, bridging and additional...

Area of Science:

• Biotechnology
• Assay Development
• Analytical Chemistry

Background:

• Critical reagents significantly impact ligand-binding assay performance.
• Biological production of reagents leads to variability in yield, purity, and performance.
• Assay performance is dictated by the quality and consistency of critical reagents.

Purpose of the Study:

• To present case studies on managing critical reagent lot changes in ligand-binding assays.
• To highlight the need for robust reagent lifecycle management strategies.
• To demonstrate solutions for maintaining assay performance despite reagent variability.

Main Methods:

• Analysis of three case studies involving critical reagent lot changes.
• Evaluation of impacts on quantitative, surrogate matrix, and immunogenicity assays.
• Development of alternative assay formats and strategies to overcome reagent issues.

Main Results:

• Lot changes in analytes necessitated assay redevelopment.
• Surrogate matrix lot variations presented long-term challenges.
• Commercial detection reagent limitations led to new assay development.

Conclusions:

• A proactive plan for critical reagent generation and lifecycle management is essential.
• Assay performance relies on the continuous supply of consistent critical reagents.
• Careful selection of reagents with appropriate binding and performance properties is crucial.