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Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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Polymeric carriers enhance targeted drug delivery by increasing efficacy while minimizing off-target effects. These carriers comprise a biodegradable polymeric backbone integrated with functional elements that enable targeting, improve physicochemical properties, and regulate drug release.Targeting MechanismsThe targeting ability of polymeric carriers is mediated by a homing device, which is a molecular recognition component designed to selectively bind to specific tissues or cells. Monoclonal...
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Related Experiment Video

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Development of a robust pH-sensitive polyelectrolyte ionomer complex for anticancer nanocarriers.

Chaemin Lim1, Yu Seok Youn2, Kyung Soo Lee3

  • 1Department of Pharmaceutical Sciences, College of Pharmacy, Chung-Ang University, Seoul, South Korea; Department of Pharmaceutical Sciences, College of Pharmacy, Chung-Ang University, Seoul, South Korea.

International Journal of Nanomedicine
|March 9, 2016
PubMed
Summary

Researchers developed a pH-sensitive polyelectrolyte ionomer complex (PIC) for nanomedicine. This drug delivery platform shows potential for targeted cancer therapy by accumulating at tumor sites.

Keywords:
PEG-PLA-PEIanimal imagingnanomedicinepH-sensitivepolyelectrolyte ionomer complex

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Nanomedicine

Background:

  • Polyelectrolyte ionomer complexes (PICs) offer versatile platforms for nanomedical applications.
  • Developing stable and functional PICs requires careful control over polymer architecture and interactions.

Purpose of the Study:

  • To synthesize and characterize a novel polyelectrolyte ionomer complex (PIC) for nanomedical applications.
  • To evaluate the pH-responsive drug release and in vivo tumor targeting capabilities of the PIC.

Main Methods:

  • Synthesis of a triblock copolymer (PEG-PLA-PEI) and poly(aspartic acid) (P[Asp]).
  • Formation of PICs through electrostatic interactions and characterization of particle size and zeta potential.
  • Loading doxorubicin (dox) into PICs and assessing pH-dependent drug release and cytotoxicity.
  • In vivo animal imaging to evaluate tumor accumulation.

Main Results:

  • Stable PICs were formed with tunable particle size and zeta potential based on the cationic/anionic ratio.
  • Dox-loaded PICs exhibited pH-dependent drug release, with increased release and cytotoxicity under acidic conditions.
  • In vivo studies demonstrated significant accumulation of PICs at the tumor site for 24 hours.

Conclusions:

  • The developed pH-sensitive PIC is a promising nanomedicinal platform for targeted anticancer therapy.
  • The combination of hydrophobic and hydrophilic blocks ensures colloidal stability and controlled drug release.
  • The PIC's ability to target tumors in vivo highlights its potential for improved cancer treatment.