Related Experiment Video

Updated: Jun 8, 2025

In vitro Method to Observe E-selectin-mediated Interactions Between Prostate Circulating Tumor Cells Derived From Patients and Human Endothelial Cells
11:56

In vitro Method to Observe E-selectin-mediated Interactions Between Prostate Circulating Tumor Cells Derived From Patients and Human Endothelial Cells

Published on: May 15, 2014

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EphA2 regulates vascular permeability and prostate cancer metastasis via modulation of cell junction protein

Carolin Offenhäuser1, Keyur A Dave2, Kirrilee J Beckett3

  • 1Cancer Program, QIMR Berghofer Medical Research Institute, Brisbane, QLD, 4006, Australia. Carolin.Offenhauser@qimrberghofer.edu.au.

Oncogene
|November 7, 2024
PubMed

Insights

Targeting EphA2 in prostate cancer shows complex effects. Specific antibodies have opposing impacts, influencing tumor growth and metastasis through key signaling pathways like PI3K/AKT/mTOR and ERK/MAPK.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • Prostate cancer necessitates novel targeted therapies due to significant morbidity and mortality.
  • EphA2 receptor tyrosine kinase presents a paradoxical target, exhibiting both pro- and anti-oncogenic roles.
  • Understanding EphA2's complex functions is crucial for developing effective prostate cancer treatments.

Purpose of the Study:

  • To investigate the dualistic functions of EphA2 in prostate cancer.
  • To elucidate the downstream signaling pathways affected by EphA2 activation.
  • To identify key molecular players mediating EphA2's effects on cancer cell behavior.

Main Methods:

  • Utilized EphA2-targeting monoclonal antibodies with distinct in vivo properties.
  • Performed comprehensive phosphoproteomic analysis after ligand-induced EphA2 activation.
  • Investigated the roles of SHB and afadin in EphA2-mediated signaling.

Main Results:

  • EphA2-targeting antibodies demonstrated opposing tumor-suppressive and oncogenic effects.
  • Identified 73 downstream phosphoproteins altered by EphA2 activation, linked to PI3K/AKT/mTOR and ERK/MAPK pathways.
  • Discovered SHB as critical for EphA2-mediated ERK/MAPK inhibition and afadin as an EphA2-regulated protein involved in prostate cancer cell migration.

Conclusions:

  • EphA2's role in prostate cancer is complex and context-dependent.
  • SHB and afadin are key mediators of EphA2 signaling in prostate cancer progression.
  • Targeted modulation of EphA2 signaling pathways offers potential therapeutic strategies for prostate cancer.

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