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A Caco-2 cell-based quantitative antioxidant activity assay for antioxidants
Hongxia Wan1, Dong Liu1, Xiangying Yu2
1Shenzhen Key Laboratory of Fermentation, Purification and Analysis, Shenzhen Polytechnic, Shenzhen 518055, People's Republic of China.
Food Chemistry
|January 12, 2015
Summary
A new Caco-2 cell-based antioxidant activity (CAA) assay was developed for evaluating antioxidants. This assay demonstrates good reproducibility and biological relevance, correlating well with established methods for antioxidant evaluation.
Area of Science:
- Biochemistry
- Cell Biology
- Pharmacology
Background:
- Accurate quantification of antioxidant activity is crucial for understanding health benefits.
- Existing methods may have limitations in reproducibility or biological relevance.
- Developing novel, reliable assays is essential for antioxidant research.
Purpose of the Study:
- To develop and optimize a Caco-2 cell-based antioxidant activity (CAA) assay for quantitative evaluation of antioxidants.
- To establish optimal conditions for the CAA assay.
- To validate the biological relevance of the developed CAA assay.
Main Methods:
- Optimization of Caco-2 cell seeding density, culture time, and fluorescent probe (DCFH-DA) parameters.
- Standardization of antioxidant incubation and fluorescence detection times.
- Correlation analysis between CAA values and rat plasma ORAC values for pure phytochemicals.
Main Results:
- The optimized CAA assay conditions include specific cell seeding density, culture time, and incubation parameters.
- The assay demonstrated good reproducibility.
- A significant positive correlation (R² = 0.815, p < 0.01) was found between CAA values and rat plasma ORAC values.
Conclusions:
- The developed Caco-2 cell-based antioxidant activity (CAA) assay provides a reproducible method for evaluating antioxidant capacity.
- The assay shows good biological relevance, correlating with in vivo antioxidant measurements.
- This CAA assay is a valuable tool for assessing the antioxidant potential of various compounds.
