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Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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...
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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Modulating Shape of Polyester Based Polymersomes using Osmotic Pressure
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Ellipsoidal Polyaspartamide Polymersomes with Enhanced Cell-Targeting Ability.

Mei-Hsiu Lai1, Jae Hyun Jeong, Ross J Devolder

  • 1Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 South Matthews Avenue, Urbana IL, 61801, USA.

Advanced Functional Materials
|August 27, 2013
PubMed
Summary
This summary is machine-generated.

Ellipsoidal polymersomes functionalized with RGD peptides show enhanced binding to target cells compared to spherical ones. This finding improves targeted delivery for diagnostic and therapeutic applications.

Keywords:
Biomedical ApplicationsBionanotechnologyPolymeric MaterialsSelf-AssemblySurface Plasmon Resonance

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Drug Delivery

Background:

  • Polymersomes are investigated for targeted delivery of diagnostic and therapeutic agents.
  • Ellipsoidal nanoparticles may offer enhanced cell binding compared to spherical ones, but this lacks experimental validation.

Purpose of the Study:

  • To experimentally validate if ellipsoidal polymersomes exhibit improved cell binding compared to spherical ones.
  • To investigate the effect of peptide functionalization on the targeting efficiency of ellipsoidal polymersomes.

Main Methods:

  • Synthesized ellipsoidal polymersomes by substituting polyaspartamide with octadecyl chains and varying poly(ethylene glycol) (PEG) chain substitution.
  • Functionalized polymersomes with Arg-Gly-Asp (RGD) peptides.
  • Assessed binding efficiency with αvβ3 integrins and evaluated adhesion under flow conditions.

Main Results:

  • Increasing PEG substitution (0.5 to 1.0 mol%) induced self-assembly into ellipsoidal polymersomes with an aspect ratio of 2.1.
  • RGD peptide-modified ellipsoidal polymersomes exhibited significantly increased association and decreased dissociation rates with αvβ3 integrins.
  • Ellipsoidal polymersomes with RGD peptides demonstrated superior adhesion to target tissues in flow conditions compared to spherical counterparts.

Conclusions:

  • Ellipsoidal polymersomes functionalized with RGD peptides enhance targeted delivery efficiency.
  • This study provides experimental evidence supporting the superior cell-binding capabilities of ellipsoidal over spherical nanoparticles for drug delivery.