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Gold Nanoparticle Synthesis
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Jaleh Varshosaz1, Saeedeh Enteshari1, Farshid Hassanzadeh2

  • 1Department of Pharmaceutics, School of Pharmacy and Novel Drug Delivery Systems Research Centre, Isfahan University of Medical Sciences, Isfahan, Iran.

Anti-Cancer Agents in Medicinal Chemistry
|September 13, 2018
PubMed
Summary
This summary is machine-generated.

This study developed targeted copolymeric micelles loaded with Docetaxel (DTX) for breast cancer therapy. These novel micelles significantly improved therapeutic efficacy and reduced toxicity compared to free DTX.

Keywords:
DocetaxelG Protein–coupled estrogen receptorPEGbreast cancerraloxifenestyrene maleic acid.

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Area of Science:

  • Biotechnology
  • Materials Science
  • Oncology

Background:

  • Nonspecific distribution of chemotherapeutic agents causes severe toxicity.
  • Targeting drugs to overexpressed tumor receptors is a promising cancer therapy approach.

Purpose of the Study:

  • Develop novel copolymeric micelles of raloxifene-targeted Styrene Maleic Acid-Poly Amide Ether Ester Imide-Poly Ethylene Glycol (SMA-PAEEI-PEG-RA).
  • Load these micelles with Docetaxel (DTX) for enhanced breast cancer treatment.

Main Methods:

  • Synthesized and confirmed targeted copolymer using FTIR and C-NMR spectroscopy.
  • Analyzed micelle physicochemical properties, drug loading, release, stability, cytotoxicity, and cellular uptake.
  • Assessed in vivo antitumor activity in breast cancer-bearing mice.

Main Results:

  • Targeted micelles exhibited particle sizes of 115.9-142.8 nm and encapsulation efficiency of 54.1-67.8%.
  • In vitro cytotoxicity showed a five-fold increase in IC50 for DTX-loaded micelles versus free DTX.
  • In vivo studies demonstrated improved survival rates and tumor inhibition with targeted micelles.

Conclusions:

  • Raloxifene-conjugated PEG-derived micelles offer a novel and effective delivery system for DTX in breast cancer.
  • Targeted delivery enhances therapeutic outcomes and minimizes systemic toxicity.