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Related Concept Videos

Modified-Release Drug Delivery Systems: Stimuli-Activated01:30

Modified-Release Drug Delivery Systems: Stimuli-Activated

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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...
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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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Modified-Release Drug Delivery Systems: Rate-Programmed I01:22

Modified-Release Drug Delivery Systems: Rate-Programmed I

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Rate-programmed drug delivery systems (DDS) are designed to release drugs at specific, controlled rates to maintain consistent therapeutic levels. These systems are categorized based on their release mechanisms, including dissolution-controlled DDS, diffusion-controlled DDS, and combined dissolution-diffusion-controlled DDS.In dissolution-controlled DDS, the release rate depends on the slow dissolution of the drug itself or the surrounding matrix. Drugs with inherently slow dissolution rates,...
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Modified-Release Drug Delivery Systems: Rate-Programmed II01:19

Modified-Release Drug Delivery Systems: Rate-Programmed II

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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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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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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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Mechanical Force-Triggered Drug Delivery.

Yuqi Zhang1,2,3, Jicheng Yu1,2, Hunter N Bomba1

  • 1Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University , Raleigh, North Carolina 27695, United States.

Chemical Reviews
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Summary
This summary is machine-generated.

Mechanically activated drug delivery systems (DDS) offer controlled therapeutic release. This review highlights advances in mechanical force-triggered DDS and discusses their clinical translation potential.

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Pharmacology

Background:

  • Advanced drug delivery systems (DDS) are crucial for enhancing therapeutic efficacy through controlled release.
  • Stimuli-responsive DDS, activated by chemical or physical triggers, are widely developed.
  • Mechanical force-based stimuli present a novel and effective platform for controlled drug release.

Purpose of the Study:

  • To review recent advancements in mechanically activated drug delivery systems (DDS).
  • To explore the activation mechanisms of DDS by various mechanical forces.
  • To discuss the potential and challenges of clinical translation for these DDS.

Main Methods:

  • Literature review of recent research on mechanically activated DDS.
  • Categorization of DDS based on mechanical stimuli (compressive, tensile, shear).
  • Inclusion of remotely triggered systems (ultrasound, magnetic field).

Main Results:

  • Mechanically activated DDS can be triggered by direct forces (compression, tension, shear) or indirect remote triggers.
  • These systems offer a robust and convenient approach for controlled drug release.
  • Significant progress has been made in developing diverse mechanically activated DDS.

Conclusions:

  • Mechanically activated DDS represent a promising frontier in drug delivery.
  • Further research is needed to overcome challenges for successful clinical translation.
  • These systems hold potential for improved therapeutic outcomes across various applications.