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Cell-based Flow Cytometry Assay to Measure Cytotoxic Activity
Published on: December 17, 2013
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A rapid method for evaluation of cell number and viability by flow cytometry
M Al-Rubeai1, K Welzenbach, D R Lloyd
1Centre for Biochemical Engineering, School of Chemical Engineering, University of Birmingham, Edgbaston, Birmingham, B 15 2 TT, UK.
Cytotechnology
|February 24, 2012
Summary
A new flow cytometry method accurately counts and assesses the viability and size of suspension cells. This reliable technique offers high precision and specificity, outperforming traditional cell counting methods.
Area of Science:
- Biotechnology
- Cell Biology
- Analytical Chemistry
Background:
- Accurate cell enumeration and viability assessment are crucial for biological research and bioprocessing.
- Traditional methods like haemacytometer/trypan blue counting can be labor-intensive, operator-dependent, and lack precision.
- There is a need for a rapid, reliable, and precise method for analyzing cell populations in suspension culture.
Purpose of the Study:
- To develop a simple, rapid, and reliable flow cytometry-based method for assessing cell number, viability, and size in suspension culture.
- To establish an internal standard for accurate cell enumeration.
- To provide a quantitative method for viable cell detection in heterogeneous cell cultures.
Main Methods:
- Utilizing flow cytometry for cell analysis.
- Employing propidium iodide (PI) exclusion for cell viability determination.
- Incorporating fluorescent beads as an internal standard for cell enumeration.
- Measuring forward scatter (FS) and side scatter (SS) light for cell size and complexity analysis.
Main Results:
- The developed method provides accurate assessment of cell number, viability, and size.
- Propidium iodide exclusion effectively distinguishes viable from non-viable cells.
- Fluorescent beads ensure precise cell enumeration, serving as an internal standard.
- The flow cytometry method demonstrates high precision and low operator dependence compared to haemacytometer/trypan blue counting.
- The method allows for quantitative detection of viable cells in mixed populations of living and dead cells and debris.
Conclusions:
- Flow cytometry offers a superior method for analyzing cell suspension cultures.
- The developed technique enhances precision and reliability in cell counting and viability assessment.
- This method is advantageous for handling large sample numbers and analyzing heterogeneous cell populations.
- The approach minimizes operator variability, leading to more reproducible results.
