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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
06:48

An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Published on: September 18, 2013

Endoglin phosphorylation by ALK2 contributes to the regulation of prostate cancer cell migration

Diana Romero1, Aleksandra Terzic, Barbara A Conley

  • 1Center for Molecular Medicine, Maine Medical Center Research Institute, Scarborough, ME 04074, USA.

Carcinogenesis
|September 9, 2009
PubMed

Insights

Endoglin phosphorylation by TGF-beta receptors regulates prostate cancer cell migration. This Smad-independent mechanism is crucial for controlling metastatic prostate cancer cell movement.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Cell Biology

Background:

  • Endoglin, a TGF-beta coreceptor, is downregulated in metastatic prostate cancer cells (PC3-M).
  • Restored endoglin expression inhibits PC3-M cell migration and tumorigenicity, but the mechanism is unknown.

Purpose of the Study:

  • To elucidate the mechanism by which endoglin regulates prostate cancer cell migration.
  • To investigate the role of endoglin phosphorylation in this process.

Main Methods:

  • Investigated endoglin phosphorylation in prostate cancer cells.
  • Utilized TGF-beta type I receptors ALK2 and ALK5 in phosphorylation studies.
  • Assessed the effect of constitutively active ALK2 on endoglin's ability to inhibit cell migration.

Main Results:

  • Endoglin is phosphorylated on cytosolic threonine residues by ALK2 and ALK5 in prostate cancer cells.
  • Constitutively active ALK2 abrogated endoglin's inhibitory effect on PC3-M cell migration.
  • Endoglin phosphorylation directly regulates prostate cancer cell migration.

Conclusions:

  • Endoglin phosphorylation by TGF-beta receptors is a key regulator of prostate cancer cell migration.
  • This phosphorylation acts via a Smad-independent pathway, offering novel therapeutic targets.

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