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Polymalic Acid-based Nano Biopolymers for Targeting of Multiple Tumor Markers: An Opportunity for Personalized Medicine?
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Octreotide-functionalized and resveratrol-loaded unimolecular micelles for targeted neuroendocrine cancer therapy

Wenjin Xu1, Jocelyn F Burke, Srikanth Pilla

  • 1Department of Biomedical Engineering, Wisconsin Institutes for Discovery, University of Wisconsin-Madison, Madison, WI 53715, USA. sgong@engr.wisc.edu.

Nanoscale
|August 30, 2013
PubMed

Insights

A novel micelle system effectively delivers resveratrol to medullary thyroid cancer (MTC) cells. This targeted approach enhances resveratrol

Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Oncology

Background:

  • Medullary thyroid cancer (MTC) is a neuroendocrine tumor (NET) often resistant to conventional treatments.
  • Resveratrol shows potential against MTC but suffers from poor bioavailability and lack of tumor specificity.
  • Existing delivery methods struggle with resveratrol's low solubility and rapid metabolism.

Purpose of the Study:

  • To design and synthesize a novel unimolecular micelle for targeted delivery of resveratrol to NET cells.
  • To evaluate the efficacy of resveratrol-loaded, octreotide-targeted micelles in suppressing MTC growth.
  • To assess the potential of this nanocarrier system for improved NET-targeted therapy.

Main Methods:

  • A hyperbranched amphiphilic block copolymer (Boltorn® H40 core, PLA inner shell, PEG outer shell) was synthesized.
  • Octreotide (OCT) was used as a targeting ligand for NET cells overexpressing somatostatin receptors.
  • Resveratrol was encapsulated within the micelles, and their characteristics, cellular uptake, and anti-cancer effects were analyzed.

Main Results:

  • The unimolecular micelles displayed uniform size and spherical morphology.
  • Resveratrol-loaded micelles demonstrated enhanced cellular uptake and growth suppression compared to non-targeted micelles.
  • Targeted micelles showed comparable in vitro efficacy to free resveratrol in inhibiting MTC cell growth and reducing NET markers.

Conclusions:

  • The H40-based unimolecular micelle system shows promise for targeted delivery of resveratrol in NET therapy.
  • This nanocarrier approach may overcome the bioavailability limitations of resveratrol for MTC treatment.
  • Further investigation into this targeted delivery system could lead to improved therapeutic strategies for neuroendocrine tumors.

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