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Updated: Jun 2, 2026
Real-time Cytotoxicity Assays in Human Whole Blood
Published on: November 7, 2014
Real-time cytotoxicity assays
Donald Wlodkowic1, Shannon Faley, Zbigniew Darzynkiewicz
1The BioMEMS Research Group, Department of Chemistry, University of Auckland, Auckland, New Zealand. d.wlodkowic@elec.gla.ac.uk
Abstract:
Validation of new therapeutic targets calls for the advance in innovative assays that probe both spatial and temporal relationships in signaling networks. Cell death assays have already found a widespread use in pharmacological profiling of anticancer drugs. Such assays are, however, predominantly restricted to end point DEAD/LIVE parameter that provides only a snapshot of inherently stochastic process such as tumor cell death. Development of new methods that can offer kinetic real-time analysis would be highly advantageous for the pharmacological screening and predictive toxicology. In the present work we outline innovative protocols for the real-time analysis of tumor cell death, based on propidium iodide (PI) and SYTOX Green probes. These can be readily adapted to both flow cytometry and time-lapse fluorescence imaging. Considering vast time savings and kinetic data acquisition such assays have the potential to be applied in a number of areas including accelerated anticancer drug discovery and high-throughput screening routines.
Insights
This study introduces new real-time cell death assays using propidium iodide (PI) and SYTOX Green probes. These innovative methods enable kinetic analysis for accelerated anticancer drug discovery and predictive toxicology.
Area of Science:
- Biotechnology and Biomedical Assays
- Cancer Therapeutics and Drug Discovery
- Cellular Signaling and Toxicology
Background:
- Advancing therapeutic target validation requires assays probing spatial and temporal signaling network dynamics.
- Current cell death assays for anticancer drug profiling are often endpoint measurements, lacking kinetic insights into stochastic processes like tumor cell death.
Purpose of the Study:
- To develop innovative protocols for real-time kinetic analysis of tumor cell death.
- To provide methods adaptable for both flow cytometry and time-lapse fluorescence imaging.
- To facilitate accelerated anticancer drug discovery and high-throughput screening.
Main Methods:
- Development of novel real-time cell death analysis protocols.
- Utilized propidium iodide (PI) and SYTOX Green fluorescent probes.
- Adaptable protocols for flow cytometry and time-lapse fluorescence imaging.
Main Results:
- Established innovative protocols for real-time kinetic analysis of tumor cell death.
- Demonstrated adaptability of these assays to flow cytometry and time-lapse fluorescence imaging.
- Highlighted potential for significant time savings and kinetic data acquisition.
Conclusions:
- The developed real-time cell death assays offer a significant advancement over endpoint methods.
- These assays provide kinetic data crucial for understanding stochastic cell death processes.
- The protocols have strong potential for application in accelerated anticancer drug discovery and predictive toxicology screening.
