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Related Experiment Video

Updated: Mar 9, 2026

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
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Improved Micellar Formulation for Enhanced Delivery for Paclitaxel.

Jieni Xu1, Xiaolan Zhang1, Yichao Chen1

  • 1Center for Pharmacogenetics, ‡Department of Pharmaceutical Sciences, School of Pharmacy, and §University of Pittsburgh Cancer Institute, University of Pittsburgh , Pittsburgh, Pennsylvania 15261, United States.

Molecular Pharmaceutics
|January 4, 2017
PubMed
Summary

A novel micellar system, PEG5k-Fmoc-S-S-FTS2, enhances drug delivery and cancer treatment efficacy. This formulation improves drug loading, stability, and targeted release of farnesyl thiosalicylic acid (FTS) and Paclitaxel (PTX) in tumor cells, leading to superior in vivo therapeutic effects.

Keywords:
drug deliverydrug-interactive motifpaclitaxelpolymeric micellereduction-sensitive

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Area of Science:

  • Bioconjugate Chemistry
  • Nanomedicine
  • Drug Delivery Systems

Background:

  • Previous work improved PEG5k-FTS2 bioactivity with disulfide bonds and enhanced drug loading/stability with Fmoc groups.
  • This study integrates both disulfide linkage and Fmoc group into PEG5k-FTS2 to create a novel micellar system.

Purpose of the Study:

  • To develop and characterize a new PEG5k-Fmoc-S-S-FTS2 micellar system.
  • To evaluate its drug loading capacity, stability, and drug release profile.
  • To assess its efficacy in vitro and in vivo for cancer therapy.

Main Methods:

  • Synthesis and characterization of PEG5k-Fmoc-S-S-FTS2 micelles.
  • Evaluation of critical micellar concentration (CMC), drug loading capacity (DLC), and colloidal stability.
  • In vitro studies on drug release, cytotoxicity in tumor cells.
  • In vitro and in vivo studies using Paclitaxel (PTX) as a model drug, including drug release kinetics, pharmacokinetics, tissue distribution, and therapeutic efficacy.

Main Results:

  • PEG5k-Fmoc-S-S-FTS2 formed filamentous micelles with a significantly lower CMC.
  • The novel system demonstrated enhanced DLC and colloidal stability compared to PEG5k-Fmoc-FTS2.
  • Increased release of FTS and enhanced cytotoxicity were observed in tumor cells.
  • PTX-loaded PEG5k-Fmoc-S-S-FTS2 micelles showed potent anti-proliferative activity, improved tumor targeting, and superior in vivo therapeutic outcomes.

Conclusions:

  • The PEG5k-Fmoc-S-S-FTS2 micellar system offers a promising platform for enhanced cancer therapy.
  • The combined disulfide linkage and Fmoc modification improve drug delivery, stability, and therapeutic efficacy.
  • This nanocarrier system facilitates targeted drug release and demonstrates significant potential for in vivo applications.