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Related Concept Videos

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

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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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Osteotropic therapy via targeted layer-by-layer nanoparticles.

Stephen W Morton1, Nisarg J Shah, Mohiuddin A Quadir

  • 1The David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering Institute for Soldier Nanotechnologies 77 Massachusetts Avenue, Cambridge, MA, 02139.

Advanced Healthcare Materials
|October 15, 2013
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Summary
This summary is machine-generated.

Developing targeted drug carriers using Layer-by-Layer assembly shows promise for treating osteosarcoma. This novel approach enhances drug delivery to tumors, improving efficacy and reducing side effects for bone cancer patients.

Keywords:
bisphosphonatebonecancer therapylayer-by-layer

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Oncology

Background:

  • Current treatments for bone diseases like osteosarcoma are often ineffective.
  • There is a critical need for targeted therapies to improve treatment efficacy and minimize side effects.

Purpose of the Study:

  • To develop functional and targeted drug carriers for primary osteosarcoma treatment.
  • To utilize Layer-by-Layer (LbL) assembly for creating tissue-specific drug delivery systems.

Main Methods:

  • Surface modification of drug-loaded nanoparticles using poly(acrylic acid) (PAA) functionalized with alendronate.
  • In vitro testing of nanoparticle binding and internalization in osteosarcoma cells.
  • In vivo efficacy studies using LbL-targeted doxorubicin liposomes in mouse models.

Main Results:

  • PAA-alendronate coated nanoparticles demonstrated rapid binding and internalization in osteosarcoma cells.
  • LbL-targeted doxorubicin liposomes showed potent in vitro toxicity.
  • In vivo studies confirmed enhanced and prolonged tumor accumulation, leading to significantly improved therapeutic efficacy.

Conclusions:

  • LbL assembly offers a tunable approach for synthesizing targeted drug carriers.
  • Surface modification of nanoparticles with alendronate enables effective tissue-specific targeting for osteosarcoma.
  • This strategy holds potential for improving systemic drug delivery and treatment outcomes for bone cancers.