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Updated: Jul 11, 2026

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

PI3K/PTEN/AKT signaling regulates prostate tumor angiogenesis

Jing Fang1, Min Ding, Lily Yang

  • 1Mary Babb Randolph Cancer Center, Department of Microbiology, Immunology and Cell Biology, West Virginia University, Morgantown, WV 26506-9300, USA.

Cellular Signalling
|September 11, 2007
PubMed

Insights

The Phosphatidylinositol 3-kinase (PI3K) pathway drives tumor growth and angiogenesis. PTEN, a PI3K inhibitor, suppresses these processes by downregulating AKT, HIF-1alpha, and VEGF, offering therapeutic potential.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Research

Background:

  • The PI3K/AKT pathway regulates cell proliferation, apoptosis, and angiogenesis.
  • PTEN is a key inhibitor of PI3K, and its loss is frequent in prostate cancer.
  • The precise role of PI3K/PTEN signaling in tumor growth and angiogenesis requires further investigation.

Purpose of the Study:

  • To elucidate the mechanism by which PI3K/PTEN signaling regulates angiogenesis and tumor growth in vivo.
  • To investigate the role of PTEN in suppressing prostate cancer progression.

Main Methods:

  • Utilized chicken chorioallantoic membrane (CAM) and nude mouse models.
  • Inhibited PI3K activity with LY294002 and reconstituted PTEN in PC-3 cells.
  • Assessed angiogenesis and tumor growth, and performed immunohistochemical staining for HIF-1alpha, VEGF, and PCNA.

Main Results:

  • PI3K inhibition by LY294002 reduced angiogenesis induced by PC-3 cells.
  • PTEN reconstitution in PC-3 cells suppressed angiogenesis and tumor growth.
  • PTEN and AKT inhibition decreased expression of HIF-1alpha and VEGF, key regulators of angiogenesis.

Conclusions:

  • PTEN inhibits tumor angiogenesis and growth by suppressing the PI3K/AKT signaling pathway.
  • AKT acts as a downstream mediator of PI3K in controlling angiogenesis and tumor growth.
  • PTEN's anti-angiogenic effect is mediated through the AKT pathway, impacting HIF-1 and VEGF expression.

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