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Fluorescent cell barcoding in flow cytometry allows high-throughput drug screening and signaling profiling.
Peter O Krutzik1, Garry P Nolan
1Department of Microbiology and Immunology, Baxter Laboratory in Genetic Pharmacology, Stanford University, Stanford, California 94305, USA.
Nature Methods
|April 22, 2006
Summary
Fluorescent cell barcoding (FCB) enables high-throughput flow cytometry by multiplexing samples. This technique significantly reduces reagent use and analysis time, accelerating drug discovery and signaling pathway analysis.
Area of Science:
- Biotechnology
- Cellular Biology
- Immunology
Background:
- Flow cytometry is crucial for single-cell analysis in drug discovery.
- Current methods lack high-throughput capacity for analyzing intracellular signaling pathways.
Purpose of the Study:
- To develop a cell-based multiplexing technique, fluorescent cell barcoding (FCB), to enhance flow cytometry's throughput.
- To apply FCB for efficient screening of small-molecule libraries and analysis of cellular signaling.
Main Methods:
- Developed fluorescent cell barcoding (FCB) using distinct fluorescence signatures for sample multiplexing.
- Combined barcoded samples from 96-well plates for antibody staining and flow cytometry analysis.
- Utilized FCB with phospho-specific flow cytometry to screen for signaling inhibitors.
Main Results:
- FCB reduced antibody consumption 100-fold and acquisition time to 5-15 min per plate.
- Successfully screened a small-molecule library for inhibitors of T cell-receptor and cytokine signaling.
- Revealed differential IFN-gamma signaling sensitivity and kinetics across various primary mouse splenocyte populations.
Conclusions:
- FCB significantly enhances the throughput and efficiency of flow cytometry for drug discovery.
- FCB facilitates simultaneous assessment of compound efficacy and selectivity in cellular signaling pathways.
- FCB enables detailed analysis of signaling dynamics in diverse primary immune cell subsets.