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Aging of biological matrices and its effect on bioanalytical method performance
Nico C van de Merbel1, Ronald de Vries
1PRA, Bioanalytical Laboratory, Westerbrink 3, 9405 BJ Assen, The Netherlands. merbelnicovande@praintl.com.
Bioanalysis
|September 27, 2013
Summary
Biological matrix aging impacts bioanalytical method reliability by altering selectivity, stability, and recovery. Understanding these changes is crucial for accurate quantitative analysis in regulated bioanalysis.
Area of Science:
- Bioanalytical Chemistry
- Pharmacokinetics
- Mass Spectrometry
Background:
- Matrix effects in Electrospray Ionization Liquid Chromatography-Mass Spectrometry (ESI LC-MS) are well-documented.
- Biological matrices can undergo changes over time, termed aging, affecting bioanalytical method performance.
- Quantitative reliability of bioanalytical methods is paramount in drug development and clinical diagnostics.
Purpose of the Study:
- To investigate the impact of biological matrix aging on bioanalytical method performance.
- To present case studies demonstrating age-related matrix effects.
- To provide guidance on addressing these effects during method development and validation.
Main Methods:
- Analysis of six case studies involving aged biological matrices.
- Evaluation of changes in matrix composition and properties over time.
- Assessment of impacts on selectivity, stability, and recovery of analytes.
Main Results:
- Matrix aging can lead to the formation or disappearance of endogenous compounds, affecting selectivity.
- Changes in enzyme activity due to aging can influence analyte stability.
- Altered extractability from binding sites in aged matrices can impact analyte recovery.
- Specific examples illustrate how these factors compromise quantitative reliability.
Conclusions:
- Biological matrix aging presents significant challenges to the quantitative reliability of bioanalytical methods beyond typical ESI LC-MS matrix effects.
- Proactive strategies during method development and validation are essential to mitigate the risks associated with matrix aging.
- Further research and standardized approaches are needed to ensure robust and reproducible bioanalytical results in regulated environments.
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