Quantification of CD95-induced apoptosis and NF-κB activation at the single cell level
Jörn H Schmidt1, Sabine Pietkiewicz1, Michael Naumann2
1Department of Translational Inflammation Research, Institute of Experimental Internal Medicine, Otto von Guericke University, Pfälzer Platz, 39106 Magdeburg, Germany.
Abstract:
CD95/Fas/APO-1 is a member of the death receptor (DR) family. Stimulation of CD95 leads to the induction of apoptosis as well as to NF-κB signaling. Crosstalk between these two pathways plays a central role in cell fate. Defects in the regulation of apoptosis and of NF-κB are connected to a number of chronic inflammatory diseases and cancer. For a better understanding of the life/death decisions in the cell and their contribution to disease progression, the development of new technologies is required. Using imaging flow cytometry we developed a method that enables a quantitative detection of different CD95 signaling pathways in the single cell. The important advantage of this method compared to other approaches is that it allows quantifying a large number of single cells undergoing apoptosis and NF-κB activation. This technology could provide new insights into the quantitative characterization of apoptosis and NF-κB at the single cell level and could be used for the quantitative network analysis in systems biology studies.
Insights
Researchers developed a new imaging flow cytometry method to quantify CD95 signaling, apoptosis, and NF-κB activation in single cells. This technology aids understanding cell fate decisions in diseases like cancer and inflammation.
Area of Science:
- Cell Biology
- Molecular Biology
- Immunology
Background:
- CD95 (also known as Fas/APO-1) is a death receptor crucial for apoptosis and NF-κB signaling.
- The interplay between apoptosis and NF-κB pathways influences cell fate and is implicated in inflammatory diseases and cancer.
- Understanding these pathways at a single-cell level is vital for disease research.
Purpose of the Study:
- To develop a novel quantitative method for analyzing CD95 signaling pathways in single cells.
- To enable simultaneous detection of apoptosis and NF-κB activation.
- To facilitate a deeper understanding of cell fate decisions and their role in disease.
Main Methods:
- Utilized imaging flow cytometry for high-throughput single-cell analysis.
- Developed a quantitative detection method for CD95 signaling, apoptosis, and NF-κB activation.
- Enabled simultaneous measurement of multiple signaling events within individual cells.
Main Results:
- Successfully quantified apoptosis and NF-κB activation in a large number of single cells.
- Demonstrated the capability to analyze distinct CD95 signaling pathways concurrently.
- Established a method for detailed single-cell characterization of these critical cellular processes.
Conclusions:
- The developed imaging flow cytometry method offers a powerful tool for quantitative analysis of apoptosis and NF-κB signaling.
- This technology provides new insights into cell fate determination at the single-cell level.
- Potential applications include quantitative network analysis in systems biology and disease research.
