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Updated: Jun 13, 2026
Use of a Caspase Multiplexing Assay to Determine Apoptosis in a Hypothalamic Cell Model
Published on: April 16, 2014
Simultaneous quantitative monitoring of drug-induced caspase cascade pathways in carcinoma cells
Pravin K Naoghare1, Hyeon A Ki, Seung-Mann Paek
1Research Institute of Pharmaceutical Sciences and College of Pharmacy, Seoul National University, Seoul 151-742, South Korea.
Abstract:
Caspases are the key mediators of apoptosis. The caspase cascade includes a series of events leading to the activation of initiator and downstream caspases in a cell. Analysis of the caspase cascade in intact cells, however, has generally been limited as the simultaneous monitoring of upstream and downstream caspases is not well executed. In an effort to monitor the activation of caspase cascades in an intact cell, high-content cellular imaging that allows simultaneous quantitative monitoring of caspase activation has been developed. This has great significance for the exploration of various cellular caspases involved in apoptotic pathways as possible therapeutic targets in the process of drug discovery. To explore the potential of simultaneous monitoring of caspase-mediated apoptotic pathways, human myeloid leukemia HL-60 cells were treated with SH-03 {(7S,7aR,13aS)-9,10-dimethoxy-3,3-dimethyl-7,7a,13,13a-tetrahydro-3H-chromeno [3,4-b]pyrano[2,3-h]chromen-7-ol} (a newly synthesized candidate), camptothecin or naringenin (agents known to induce apoptosis) with or without caspase inhibitors. SH-03 or naringenin treatment initiated the caspase cascade through an intrinsic apoptotic pathway, whereas camptothecin treatment triggered both intrinsic and extrinsic caspase cascades. We now report a new approach based on uniform threshold intensity distribution that facilitates rapid, quantitative monitoring of drug-induced caspase cascades through multi-spectral and multicolor imaging cytometry.
Insights
A new high-content imaging method allows simultaneous monitoring of caspase activation in intact cells. This technique aids in discovering novel apoptosis-targeting drugs by analyzing caspase cascades during drug discovery.
Area of Science:
- Cell Biology
- Biochemistry
- Pharmacology
Background:
- Caspases are crucial for apoptosis, but simultaneous monitoring of their cascade in intact cells is challenging.
- Understanding caspase activation is vital for identifying therapeutic targets in drug discovery.
Purpose of the Study:
- To develop and validate a high-content imaging approach for simultaneous quantitative monitoring of caspase cascade activation.
- To explore the potential of this method in drug discovery by analyzing apoptosis induction by novel and known agents.
Main Methods:
- Utilized high-content cellular imaging with multi-spectral and multicolor imaging cytometry.
- Developed a uniform threshold intensity distribution method for rapid, quantitative analysis.
- Treated human myeloid leukemia HL-60 cells with SH-03, camptothecin, naringenin, and caspase inhibitors.
Main Results:
- The new imaging method successfully monitored caspase cascade activation in response to apoptosis-inducing agents.
- SH-03 and naringenin initiated the intrinsic apoptotic pathway.
- Camptothecin triggered both intrinsic and extrinsic caspase cascades.
Conclusions:
- The developed imaging cytometry approach provides a powerful tool for rapid, quantitative monitoring of drug-induced caspase cascades.
- This method has significant implications for exploring cellular caspases as therapeutic targets in drug discovery.
