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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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Drug Delivery Systems: Different Types01:27

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Conventional oral drug products, termed immediate-release (IR) formulations, are engineered to promptly release their active pharmaceutical ingredient (API) upon ingestion, typically in tablets or capsules. This rapid release often results in swift drug absorption and consequent pharmacodynamic effects, although the timing and intensity can vary depending on the drug's properties. Prodrugs within these formulations require metabolic conversion to activate their pharmacodynamic effects,...
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Modified-release dosage forms are designed to address the limitations of drugs with short biological half-lives. These forms maintain stable therapeutic drug concentrations over extended periods, reducing the need for frequent dosing. A consistent drug level helps minimize peak-trough fluctuations, which can reduce adverse effects, lower the risk of drug resistance, and improve overall treatment effectiveness.One common type of modified-release form is the extended-release (ER) formulation. ER...
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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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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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The selection of a drug's delivery route depends upon its physicochemical properties, including lipid or water solubility and ionization, as well as the therapeutic requirement, such as immediate or sustained effect. These routes can be divided into three primary categories: enteral, parenteral, and topical.
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Véronique Bonnet1, Cédric Gervaise2, Florence Djedaïni-Pilard1

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Nonionic amphiphilic cyclodextrins form nanoparticles for controlled drug release. Their structure-property relationships and preparation methods are key for effective nanodevice applications in drug delivery.

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Area of Science:

  • * Nanotechnology
  • * Polymer Chemistry
  • * Pharmaceutical Sciences

Background:

  • * Biodegradable and nontoxic compounds are crucial for nanoparticle drug delivery systems.
  • * Amphiphilic cyclodextrins offer promising potential for creating such nanoparticles.
  • * While ionic cyclodextrins are well-studied for gene delivery, nonionic variants require further exploration for drug release applications.

Purpose of the Study:

  • * To describe supramolecular assemblies of nonionic amphiphilic cyclodextrins.
  • * To elucidate the structure-physicochemical property relationships governing self-assembly and drug delivery.
  • * To emphasize the significance of nanoparticle preparation techniques for nanodevice stability and efficacy.

Main Methods:

  • * Review of existing literature on amphiphilic cyclodextrins and nanoparticle formation.
  • * Analysis of structure-property relationships in nonionic amphiphilic cyclodextrin nanoassemblies.
  • * Discussion of nanoparticle preparation methods relevant to drug delivery.

Main Results:

  • * Nonionic amphiphilic cyclodextrins can form stable nanoassemblies suitable for drug delivery.
  • * Specific structural features directly influence self-assembly behavior and drug release kinetics.
  • * Optimized preparation methods enhance nanoparticle stability and performance.

Conclusions:

  • * Nonionic amphiphilic cyclodextrins represent a viable platform for developing advanced drug delivery nanodevices.
  • * Understanding the interplay between molecular structure and assembly characteristics is vital for designing effective nanocarriers.
  • * Nanoparticle preparation technology is critical for translating these systems into practical therapeutic applications.