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A Multiplexed Luciferase-based Screening Platform for Interrogating Cancer-associated Signal Transduction in Cultured Cells
Published on: July 3, 2013
A combination assay for simultaneous assessment of multiple signaling pathways
A S Goetz1, J Liacos, J Yingling
1Department of Receptor Biochemistry, Glaxo Wellcome Research and Development, 5 Moore Drive, 3.2054, Research Triangle Park, NC 27709, USA.
Journal of Pharmacological and Toxicological Methods
|October 18, 2000
Summary
This study introduces a novel assay combining reporter genes and fluorescent probes to simultaneously measure multiple cellular signaling pathways. This method enables efficient screening of ligands targeting multiple receptors and assessing complex pharmacological responses.
Area of Science:
- Biochemistry
- Molecular Biology
- Pharmacology
Background:
- Simultaneous assessment of multiple signaling pathways is crucial for understanding complex cellular responses.
- Existing methods often lack the capacity to analyze concurrent modulations of distinct pathways.
- Reporter gene systems and fluorescent probes offer potential for multiplexed biological assays.
Purpose of the Study:
- To develop and validate a novel assay for concurrent assessment of two or more signaling pathways.
- To demonstrate the utility of this assay in studying receptor pharmacology, particularly for receptors coupled to multiple G proteins.
- To showcase the application of the assay in screening ligands for multiple unrelated receptors simultaneously.
Main Methods:
- Combines reporter gene systems (e.g., CRE-luciferase) with fluorescent probe technology (e.g., Calcium Green-1 AM).
- Utilizes a fluorescent imaging plate reader for simultaneous measurement of luminescence and fluorescence.
- Employs stably transfected cell lines (CHO, Rat-1) expressing specific receptors and reporter genes.
Main Results:
- Validated the assay by concurrently measuring adenylyl cyclase activation and calcium mobilization.
- Demonstrated successful pharmacological profiling of pituitary adenylyl cyclase-activating peptide (PACAP) receptors in CHO cells.
- Showcased simultaneous assessment of alpha1A adrenergic and GLP-1 receptors in cocultured cells, yielding comparable pEC50 values.
Conclusions:
- The developed assay enables concurrent analysis of multiple signaling pathways with high fidelity.
- This method is effective for studying the pharmacology of receptors coupled to diverse signaling cascades.
- The assay provides a versatile platform for high-throughput screening of ligands targeting multiple receptors simultaneously.
