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Updated: May 17, 2026
09:57
A Facile and Efficient Approach for the Production of Reversible Disulfide Cross-linked Micelles
Published on: December 23, 2016
A cross-linked polymeric micellar delivery system for cisplatin(IV) complex.
Haiqin Song1, Rui Wang, Haihua Xiao
1Department of Colorectal and Anal Surgery, China-Japan Union Hospital of Jilin University, Changchun, People's Republic of China.
Summary
This study developed a novel polymeric cisplatin(IV) prodrug micelle (M(Pt(IV))) for enhanced cancer therapy. The prodrug shows improved cellular uptake, targeted tumor accumulation, and reduced systemic toxicity compared to traditional cisplatin formulations.
Area of Science:
- Polymer Chemistry
- Nanomedicine
- Drug Delivery Systems
Background:
- Cisplatin is a widely used chemotherapy drug but suffers from severe side effects and limited efficacy.
- Developing novel drug delivery systems can improve cisplatin's therapeutic index by enhancing tumor targeting and reducing systemic toxicity.
Purpose of the Study:
- To synthesize and characterize a polymeric cisplatin(IV) prodrug in the form of cross-linked micelles (M(Pt(IV))).
- To evaluate the in vitro and in vivo performance of the M(Pt(IV)) micelles, including drug release, cellular uptake, cytotoxicity, and biodistribution.
Main Methods:
- Preparation of MPEG-b-PCL-b-PLL micelles and conjugation of cisplatin(IV) complex.
- Characterization using Transmission Electron Microscopy (TEM), Dynamic Light Scattering (DLS), and zeta potential measurements.
- In vitro release studies at different pH and in the presence of sodium ascorbate (NaAsc).
- In vitro cytotoxicity assays and cellular internalization studies.
- In vivo studies to assess platinum (Pt) species accumulation in tumors and systemic toxicity.
Main Results:
- The M(Pt(IV)) micelles were successfully prepared and characterized.
- The micelles demonstrated sensitivity to acidic conditions and reducing agents, releasing cisplatin(II) in the presence of NaAsc.
- Released cisplatin(II) effectively chelated with nucleobases.
- M(Pt(IV)) micelles exhibited comparable cytotoxicity to cisplatin and significantly enhanced cellular internalization.
- In vivo studies revealed increased Pt accumulation in tumor sites and reduced systemic toxicity compared to free cisplatin.
Conclusions:
- The developed polymeric cisplatin(IV) prodrug micelles represent a promising nanomedicine platform for cancer treatment.
- This formulation offers improved drug delivery, enhanced tumor targeting, and a better safety profile.
- Further investigation and application of this polymeric prodrug are warranted for future cancer therapy development.
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