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Related Concept Videos

Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

Site-targeted drug delivery systems enhance therapeutic efficacy while minimizing systemic toxicity and treatment costs. Unlike conventional methods, these systems ensure precise drug delivery, improving bioavailability and reducing side effects. Targeted drug delivery is classified into three levels. First-order targeting directs drugs to the capillary beds of specific organs or tissues. Second-order targets specific cell types, such as tumor cells, using receptor-mediated interactions.
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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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Post-coupling strategy enables true receptor-targeted nanoparticles.

Jianmeizi Chen1, Michael R Jorgensen, Maya Thanou

  • 1Imperial College Genetic Therapies Centre, Department of Chemistry, Flowers Building, Armstrong Road, Imperial College London, London SW7 2AZ, UK.

Journal of Rnai and Gene Silencing : an International Journal of RNA and Gene Targeting Research
|November 18, 2011
PubMed
Summary
This summary is machine-generated.

Researchers developed novel nanoparticles for targeted delivery of therapeutic agents like small interfering RNA (siRNA). These nanoparticles utilize integrin-targeting peptides for enhanced cellular uptake and precise delivery, improving therapeutic efficacy.

Keywords:
Integrin ligandRNAicellular uptakedeliveryintegrin receptornanoparticlessiRNA

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Published on: September 20, 2011

Area of Science:

  • Biotechnology
  • Nanomedicine
  • Molecular Biology

Background:

  • Targeted delivery of biopharmaceuticals like small interfering RNA (siRNA) is crucial for therapeutic efficacy.
  • Previous work demonstrated passive targeting of siRNA to liver and tumor cells using pH-triggered and long-term circulation PEGylated nanoparticles.
  • Enhanced siRNA delivery efficiency necessitates active targeting strategies via receptor-mediated nanoparticle technologies.

Purpose of the Study:

  • To develop a synthetic chemistry and bioconjugation methodology for controlled formulation of PEGylated nanoparticles.
  • To enable unambiguous surface presentation of integrin-targeting peptides on nanoparticles.
  • To achieve integrin receptor-mediated cellular uptake for targeted delivery of therapeutic agents.

Main Methods:

  • Development of a novel synthetic chemistry approach for nanoparticle formulation.
  • Implementation of a bioconjugation methodology for attaching biological ligands.
  • Surface functionalization of PEGylated nanoparticles with integrin-targeting peptides.
  • In vitro and in vivo evaluation of nanoparticle-mediated cellular uptake and delivery.

Main Results:

  • Successful development of PEGylated nanoparticles presenting integrin-targeting peptides.
  • Demonstration of controlled formulation and unambiguous peptide presentation.
  • Evidence of integrin receptor-mediated cellular uptake facilitated by the targeted nanoparticles.
  • Preliminary delivery data supporting the proposed physical principles for receptor-mediated targeting.

Conclusions:

  • The developed methodology enables the creation of targeted nanoparticles for enhanced cellular uptake.
  • Integrin-targeting peptides on nanoparticles facilitate receptor-mediated delivery of therapeutic agents.
  • The findings provide a foundation for advancing receptor-mediated targeted delivery systems for various applications.
  • This approach holds promise for the future development of targeted therapies and imaging agents.