Homogeneous time-resolved fluorescence-based assay to monitor extracellular signal-regulated kinase signaling in a high-throughput format

Mohammed Akli Ayoub, Julien Trebaux, Julie Vallaghe, Fabienne Charrier-Savournin, Khaled Al-Hosaini, Arturo Gonzalez Moya, Jean Philippe Pin, Kevin D.G. Pfleger, Eric Trinquet

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The extracellular signal-regulated kinases (ERKs) are key components of multiple important cell signaling pathways regulating diverse biological responses. This signaling is characterized by phosphorylation cascades leading to ERK1/2 activation and promoted by various cell surface receptors including G protein-coupled receptors (GPCRs) and receptor tyrosine kinases (RTKs). We report the development of a new cell-based Phospho-ERK1/2 assay (designated Phospho-ERK), which is a sandwich proximity-based assay using the homogeneous time-resolved fluorescence technology. We have validated the assay on endogenously expressed ERK1/2 activated by the epidermal growth factor as a prototypical RTK, as well as various GPCRs belonging to different classes and coupling to different heterotrimeric G proteins. The assay was successfully miniaturized in 384-well plates using various cell lines endogenously, transiently, or stably expressing the different receptors. The validation was performed for agonists, antagonists, and inhibitors in dose-response as well as kinetic analysis, and the signaling and pharmacological properties of the different receptors were reproduced. Furthermore, the determination of a Z′-factor value of 0.7 indicates the potential of the Phospho-ERK assay for high-throughput screening of compounds that may modulate ERK1/2 signaling. Finally, our study is of great interest in the current context of investigating ERK1/2 signaling with respect to the emerging concepts of biased ligands, G protein-dependent/independent ERK1/2 activation, and functional transactivation between GPCRs and RTKs, illustrating the importance of considering the ERK1/2 pathway in cell signaling.

Original languageEnglish
Article number94
JournalFrontiers in Endocrinology
Volume5
Issue numberJUN
DOIs
Publication statusPublished - 2014
Externally publishedYes

Keywords

  • EGFR
  • ERK1/2
  • GPCR
  • HTRF®
  • RTK

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism

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