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Updated: Jun 26, 2026

Live-Cell Förster Resonance Energy Transfer Imaging of Metabolically Regulated Akt Activation Dynamics in HepG2 Cells
Published on: May 23, 2025
Measurement of PTEN activity in vivo by imaging phosphorylated Akt
Erika Rosivatz1, Rudiger Woscholski
1Division of Cell and Molecular Biology, Imperial College London, London, UK. e.rosivatz@imperial.ac.uk
Abstract:
This chapter describes an indirect approach to measure PTEN's lipid phosphatase activity in vivo. PTEN counteracts phosphatidylinositol 3-kinase action in dephosphorylating 3-phosphorylated phosphoinositides. Therefore, PtdIns(3,4,5)P3-dependent activation and phosphorylation of the survival kinase Akt can be used as readout for cellular PTEN activity. Here we have outlined a detailed procedure employing a phosphoserine-specific anti-Akt antibody to examine the content of phosphorylated Akt by immunofluorescence and its dependence on PTEN activity.
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