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Related Concept Videos

Modified-Release Drug Delivery Systems: Rate-Programmed II01:19

Modified-Release Drug Delivery Systems: Rate-Programmed II

Rate-programmed drug delivery systems release drugs in a controlled manner to maintain therapeutic levels. Three main designs include reservoir, matrix, and hybrid systems.Reservoir systems consist of a drug core enclosed within a membrane that controls drug release. In non-swelling reservoir systems, polymers like ethyl cellulose or polymethacrylates are used. These do not hydrate in aqueous media and control release through membrane thickness, porosity, or insolubility. This type includes...
Modified-Release Drug Delivery Systems: Classification01:23

Modified-Release Drug Delivery Systems: Classification

Modified-release drug delivery systems improve drug efficacy and minimize side effects by controlling the rate and location of drug release. These systems fall into three categories: rate-programmed, stimuli-activated, and site-targeted.Rate-programmed systems release drugs at a predetermined rate, maintaining consistent therapeutic levels and reducing fluctuations that could lead to toxicity or subtherapeutic effects. These systems use polymeric matrices, reservoir-based designs, or osmotic...
Modified-Release Drug Delivery Systems: Stimuli-Activated01:30

Modified-Release Drug Delivery Systems: Stimuli-Activated

Stimuli-activated drug delivery systems are designed to release drugs in response to specific physical, chemical, or biological stimuli. These systems often utilize hydrogels—three-dimensional, hydrophilic polymer networks capable of swelling in aqueous environments and retaining significant fluid volumes. Upon exposure to particular stimuli, these hydrogels undergo structural transitions that allow the embedded drug to be released. Due to this adaptive behavior, such systems are also called...
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.
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...

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Related Experiment Video

Updated: Jun 11, 2026

Formulation of Diblock Polymeric Nanoparticles through Nanoprecipitation Technique
06:47

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Published on: September 20, 2011

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Polymeric Nanoparticles for Drug Delivery.

Maximilian A Beach1, Umeka Nayanathara1, Yanting Gao1

  • 1School of Chemistry, The University of Melbourne, Parkville, Victoria 3010, Australia.

Chemical Reviews
|April 16, 2024
PubMed
Summary
This summary is machine-generated.

Polymeric nanoparticles offer advanced drug delivery with tunable properties for targeting diseases. Despite their potential, clinical applications remain limited, highlighting challenges for future development.

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Area of Science:

  • Nanomedicine
  • Polymer Science
  • Drug Delivery Systems

Background:

  • Nanomedicine has advanced therapeutic strategies, requiring sophisticated drug delivery systems.
  • Polymeric nanoparticles are leading designs due to their controllable physicochemical properties (size, shape, charge, functionality).
  • These nanoparticles can overcome biological barriers, target specific sites, encapsulate diverse therapeutic payloads, and respond to stimuli.

Purpose of the Study:

  • To provide a comprehensive review of polymeric nanoparticles as drug delivery vehicles.
  • To outline biological barriers impacting drug delivery.
  • To explore nanoparticle designs, preparation methods, and their performance against various diseases.

Main Methods:

  • Literature review of polymeric nanoparticle applications in nanomedicine.
  • Analysis of nanoparticle design principles and fabrication techniques.
  • Evaluation of current therapeutic performance in diseases like cancer and infections.

Main Results:

  • Polymeric nanoparticles demonstrate significant potential in overcoming biological barriers and targeted drug delivery.
  • Their performance against cancer, viral, and bacterial infections is extensively reviewed.
  • Despite advantages, clinical translation of polymeric nanoparticles is currently limited.

Conclusions:

  • Polymeric nanoparticles represent a promising platform for advanced drug delivery.
  • Addressing current challenges is crucial for expanding their clinical utility.
  • Future research should focus on overcoming hurdles to wider clinical adoption.