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Updated: Oct 8, 2026

Radiolabeling and Quantification of Cellular Levels of Phosphoinositides by High Performance Liquid Chromatography-coupled Flow Scintillation
10:52

Radiolabeling and Quantification of Cellular Levels of Phosphoinositides by High Performance Liquid Chromatography-coupled Flow Scintillation

Published on: January 6, 2016

Glycerophosphoinositols as potential markers of ras-induced transformation and novel second messengers

D Corda1, M Falasca

  • 1Istituto di Ricerche Farmacologiche Mario Negri, Consorzio Mario Negri Sud, Laboratory of Cellular and Molecular Endocrinology, Santa Maria Imbaro (Chieti), Italy.

Anticancer Research
|May 1, 1996
PubMed

Insights

Glycerophosphoinositols, linked to oncogene-transformed cells, may serve as cancer markers. Glycerophosphoinositol-4-phosphate (GroPIns4P) also acts as a signaling molecule, potentially linking ras pathways to adenylyl cyclase.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Oncology

Background:

  • Glycerophosphoinositols are metabolites derived from phosphoinositides.
  • Elevated glycerophosphoinositol levels are observed in oncogene-transformed cell lines, suggesting their role as potential markers of cell transformation.
  • These metabolites possess biological activity, with glycerophosphoinositol-4-phosphate (GroPIns4P) identified as an inhibitor of adenylyl cyclase.

Purpose of the Study:

  • To investigate the role of glycerophosphoinositols as markers of cell transformation.
  • To explore the biological activity of GroPIns4P and its potential function as a second messenger.
  • To elucidate the cross-talk between the ras signaling cascade and adenylyl cyclase mediated by GroPIns4P.

Main Methods:

  • Analysis of metabolite levels in cell lines.
  • Biochemical assays to determine enzyme activity and inhibition.
  • Cellular studies to investigate signaling pathways.

Main Results:

  • Increased levels of glycerophosphoinositols were found in oncogene-transformed cell lines.
  • GroPIns4P was confirmed to inhibit adenylyl cyclase activity by acting on the Gs protein.
  • GroPIns4P is physiologically produced in response to hormone stimulation in various cell types.

Conclusions:

  • Glycerophosphoinositols show promise as biomarkers for cell transformation.
  • GroPIns4P functions as a signaling molecule that can inhibit adenylyl cyclase.
  • GroPIns4P may mediate cross-talk between ras signaling and adenylyl cyclase, acting as a second messenger.

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