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Viability Assays for Cells in Culture
Published on: January 20, 2014
Defining viability in mammalian cell cultures.
Susan M Browne1, Mohamed Al-Rubeai
1Conway Institute of Biomolecular and Biomedical Research and School of Chemical and Bioprocess Engineering, University College Dublin, Belfield, Dublin 4, Ireland. susan.browne@ucd.ie
Biotechnology Letters
|June 3, 2011
Summary
Most cell viability assays ignore early apoptotic cells, leading to inaccurate cell culture data. Accurately measuring both necrotic and apoptotic cell death is crucial for reliable experimental results.
Area of Science:
- Cell Biology
- Biotechnology
- Experimental Pathology
Background:
- Mammalian cell culture viability is commonly assessed by membrane integrity assays, which detect necrotic cell death.
- Early apoptotic cells, representing the majority of cell death, are often overlooked as they retain an intact plasma membrane.
- This oversight can significantly impact the interpretation of cell culture experiments.
Purpose of the Study:
- To evaluate the impact of commonly used viability assays on mammalian cell culture parameters.
- To highlight the discrepancies arising from assays that only detect necrotic cell death.
- To emphasize the importance of including assays for apoptotic cells in viability assessments.
Main Methods:
- Comparison of cell viability measurements using membrane integrity assays (necrotic cell death) and apoptosis-specific assays.
- Analysis of common mammalian cell lines.
- Assessment of the effect of assay selection on cell culture parameter calculations.
Main Results:
- Discrepancies were observed between membrane integrity assays and apoptosis assays in measuring overall cell viability.
- The exclusive use of membrane integrity assays leads to an underestimation of cell death.
- This underestimation significantly skews the calculation of cell culture parameters and experimental data.
Conclusions:
- Standard viability assays focusing solely on membrane integrity fail to capture the majority of cell death in mammalian cultures (apoptosis).
- Inaccurate viability measurements due to assay selection can lead to flawed experimental conclusions.
- Comprehensive viability assessment, including both necrotic and apoptotic cell death, is essential for accurate cell culture research.
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