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Related Concept Videos

Site-Targeted Drug Delivery Systems: Polymeric Carriers01:24

Site-Targeted Drug Delivery Systems: Polymeric Carriers

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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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Micelles01:30

Micelles

364
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
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Modified-Release Drug Delivery Systems: Site-Targeted01:24

Modified-Release Drug Delivery Systems: Site-Targeted

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

Modified-Release Drug Delivery Systems: Rate-Programmed II

137
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...
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Oral Drug Delivery Systems: Delayed-Release Systems01:11

Oral Drug Delivery Systems: Delayed-Release Systems

222
Delayed-release drug delivery systems are specialized pharmaceutical formulations designed to postpone the release of active compounds until the drug reaches a specific region of the gastrointestinal (GI) tract, typically the intestine. These systems are essential for drugs that may cause gastric irritation, are unstable in acidic environments, or need to exert therapeutic effects locally in the intestinal or colonic regions.The core feature of delayed-release systems is the use of enteric...
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Modified-Release Drug Delivery Systems: Classification01:23

Modified-Release Drug Delivery Systems: Classification

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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...
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Related Experiment Video

Updated: May 5, 2026

Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
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Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles

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Polysaccharide-based micelles for drug delivery.

Nan Zhang1, Patricia R Wardwell, Rebecca A Bader

  • 1Syracuse Biomaterial Institute, 318 Bowne Hall, Syracuse University, Syracuse, NY 13244, USA. babader@syr.edu.

Pharmaceutics
|December 5, 2013
PubMed
Summary

Natural polysaccharides offer a safer alternative to synthetic polymers for creating micelle drug delivery systems. These polysaccharide-based micelles enhance solubility, stability, and targeting of hydrophobic drugs.

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Last Updated: May 5, 2026

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Area of Science:

  • Biomaterials Science
  • Drug Delivery Systems
  • Nanotechnology

Background:

  • Hydrophobic drug delivery faces challenges with poor bioavailability and stability.
  • Synthetic polymers in micelle carriers can cause toxicity and immunogenicity.
  • Natural polysaccharides are investigated as biocompatible alternatives.

Purpose of the Study:

  • To review the advantages of using natural polysaccharides in drug delivery systems.
  • To provide an overview of developed polysaccharide-based micelle carriers.
  • To highlight polysaccharide-derived micelles for improved drug solubility and stability.

Main Methods:

  • Grafting hydrophobic moieties onto polysaccharide backbones to form self-assembled micelles.
  • Utilizing the inherent bioactivity and hydrophilic nature of polysaccharides.
  • Reviewing existing literature on polysaccharide-based micelle development.

Main Results:

  • Polysaccharide-based micelles improve solubility and stability of hydrophobic drugs.
  • These systems offer potential for mucoadhesion and targeted delivery.
  • Inherent properties of polysaccharides can reduce inflammatory responses.
  • Hydrophilic nature enhances circulatory stability of drug carriers.

Conclusions:

  • Natural polysaccharides are promising biomaterials for advanced micelle drug delivery.
  • Polysaccharide-based micelles offer enhanced bioavailability and reduced toxicity.
  • Further development of these systems can overcome current drug delivery limitations.