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Navigating AKT-ivity across cellular compartments.

Jichao Sun1, Mo Chen2

  • 1Department of Critical Care Medicine, Shenzhen People's Hospital, The Second Clinical Medical College, Jinan University, and First Affiliated Hospital, Southern University of Science and Technology (SUSTech), Shenzhen 518020, China; Department of Geriatrics, Guangdong Provincial Clinical Research Center for Geriatrics, Shenzhen Clinical Research Center for Geriatrics, Shenzhen People's Hospital, Shenzhen 518020, China.

Trends in Cell Biology
|August 29, 2025
PubMed
Summary
This summary is machine-generated.

Phosphoinositide (PIP)-mediated AKT signaling is vital for cell health, controlling key functions. This review explores how PIPs spatially regulate AKT across cell compartments, impacting cancer and offering therapeutic insights.

Keywords:
AKTendosomenucleusphosphoinositideplasma membraneprotein scaffold

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Area of Science:

  • Cell Biology
  • Molecular Oncology
  • Signal Transduction

Background:

  • Phosphoinositide (PIP)-mediated AKT signaling regulates fundamental cellular processes like metabolism, survival, proliferation, and motility.
  • Dysregulation of AKT signaling is implicated in various pathologies, most notably cancer.
  • While cytosolic AKT activation is well-studied, its nuclear functions are an emerging area of research.

Purpose of the Study:

  • To review the spatial regulation of AKT signaling by phosphoinositides (PIPs) across different cellular compartments.
  • To elucidate the mechanisms of AKT compartmentalization and its functional consequences.
  • To highlight the role of PIP-driven AKT spatial regulation in oncogenesis and chemoresistance.

Main Methods:

  • Literature review focusing on phosphoinositide-mediated AKT signaling.
  • Analysis of AKT localization and function in plasma membrane microdomains, endosomes, and the nucleus.
  • Exploration of protein scaffolds and signalosomes in refining AKT signal specificity.

Main Results:

  • AKT activation occurs at specialized microdomains and cell-cell junctions on the plasma membrane, influencing cell polarity, adhesion, and migration.
  • In endosomes, PIPs integrate AKT signaling with intracellular trafficking and cytoskeletal organization.
  • Nuclear AKT interacts with the p53-PIP signalosome and kinases, regulating oncogenesis and chemoresistance.

Conclusions:

  • PIP-driven spatial compartmentalization of AKT is a critical determinant of cellular responses and oncogenesis.
  • Understanding AKT's localization and regulation within different cellular compartments offers insights into cancer biology.
  • Elucidating these mechanisms may reveal novel therapeutic strategies for cancer treatment.