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Related Experiment Videos

Sheddable coatings for long-circulating nanoparticles.

Birgit Romberg1, Wim E Hennink, Gert Storm

  • 1Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, Sorbonnelaan 16, Utrecht, The Netherlands.

Pharmaceutical Research
|June 7, 2007
PubMed
Summary
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Sterically stabilized nanoparticles use hydrophilic polymers like poly(ethylene glycol) for prolonged circulation. This review explores shedding strategies to remove the coating at target sites, enhancing drug delivery and therapeutic efficacy.

Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Nanotechnology

Background:

  • Nanoparticles (liposomes, micelles, etc.) are key drug carriers.
  • Hydrophilic polymers (e.g., poly(ethylene glycol)) provide stealth properties for prolonged circulation.
  • Stealth coatings reduce protein adsorption and macrophage uptake, crucial for targeted delivery.

Purpose of the Study:

  • To review literature on nanoparticle coating shedding strategies.
  • To investigate methods for enhancing therapeutic efficacy of sterically stabilized nanoparticles.
  • To describe detachment mechanisms and stimuli for nanoparticle 'unmasking'.

Main Methods:

  • Literature review of scientific publications on nanoparticle shedding.
  • Analysis of various detachment mechanisms and stimuli used in nanoparticle design.

Related Experiment Videos

  • Categorization of shedding strategies for sterically stabilized nanoparticulates.

    • Main Results:

    • Polymer coatings, while essential for circulation, can impede drug release and target interaction.
    • Nanoparticle 'unmasking' via coating shedding can improve drug delivery and therapeutic outcomes.
    • Various stimuli (e.g., pH, enzymes) and mechanisms are employed to trigger polymer detachment.

    Conclusions:

    • Coating shedding is a promising strategy to overcome limitations of stealth nanoparticles.
    • Tailoring shedding mechanisms can optimize drug release kinetics and target cell interaction.
    • Further research into controlled shedding will advance nanoparticle-based therapeutics.