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An Orthotopic Murine Model of Human Prostate Cancer Metastasis
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An Orthotopic Murine Model of Human Prostate Cancer Metastasis

Published on: September 18, 2013

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Integrin alpha V beta 3 targeted dendrimer-rapamycin conjugate reduces fibroblast-mediated prostate tumor progression

Elliott E Hill1, Jin Koo Kim1,2,3, Younghun Jung4

  • 1Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, Ann Arbor, Michigan.

Journal of Cellular Biochemistry
|January 31, 2018
PubMed

Insights

Novel nanoparticles delivering rapamycin target prostate cancer cells and associated fibroblasts, inhibiting tumor growth and metastasis. This approach shows promise for advanced prostate cancer therapy by targeting the tumor microenvironment.

Area of Science:

  • Nanotechnology
  • Oncology
  • Pharmacology

Background:

  • Targeting both cancer cells and the tumor microenvironment is a promising therapeutic strategy.
  • Generation 5 (G5) dendrimers conjugated with cyclic-RGD peptides selectively target integrin alpha V beta 3-expressing cells.

Purpose of the Study:

  • To develop and evaluate a novel dendrimer conjugate for delivering the mTOR inhibitor, rapamycin.
  • To assess the efficacy of G5-FI-RGD-rapamycin in inhibiting prostate cancer (PCa) progression and metastasis.

Main Methods:

  • In vitro studies using prostate cancer cells and fibroblasts to analyze mTOR signaling and VEGF expression.
  • In vivo studies to evaluate the inhibition of fibroblast-mediated PCa progression and metastasis.

Main Results:

  • G5-FI-RGD-rapamycin effectively binds to PCa cells and fibroblasts, inhibiting mTOR signaling and VEGF expression.
  • The drug conjugate shows enhanced inhibition of mTOR signaling in cancer cells under proinflammatory conditions compared to free rapamycin.
  • In vivo studies demonstrated significant inhibition of fibroblast-mediated PCa progression and metastasis by G5-FI-RGD-rapamycin.

Conclusions:

  • Rapamycin-conjugated multifunctional nanoparticles represent a potential new therapeutic strategy for prostate cancer.
  • Targeting integrin alpha V beta 3 and delivering rapamycin via dendrimer conjugates offers a dual approach to combat PCa.
  • The developed nanoparticles show promise in inhibiting tumor progression and metastasis by modulating the tumor microenvironment.
Keywords:
VEGFdendrimerfibroblastintegrinmTORmetastasisprostate cancerrapamycin

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