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Updated: Sep 30, 2025
FRET Microscopy for Real-time Monitoring of Signaling Events in Live Cells Using Unimolecular Biosensors
Published on: August 20, 2012
Automated Image Analysis of FRET Signals for Subcellular cAMP Quantification
Silas J Leavesley1,2,3, Naga Annamdevula4,5,6, Santina Johnson4,5
1Department of Chemical and Biomolecular Engineering, University of South Alabama, Mobile, AL, USA. leavesley@southalabama.edu.
Abstract:
A variety of FRET probes have been developed to examine cAMP localization and dynamics in single cells. These probes offer a readily accessible approach to measure localized cAMP signals. However, given the low signal-to-noise ratio of most FRET probes and the dynamic nature of the intracellular environment, there have been marked limitations in the ability to use FRET probes to study localized signaling events within the same cell. Here, we outline a methodology to dissect kinetics of cAMP-mediated FRET signals in single cells using automated image analysis approaches. We additionally extend these approaches to the analysis of subcellular regions. These approaches offer a unique opportunity to assess localized cAMP kinetics in an unbiased, quantitative fashion.
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