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Related Concept Videos

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

Oral Drug Delivery Systems: Delayed-Release Systems

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...
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.

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Related Experiment Video

Updated: May 22, 2026

Manufacture and Drug Delivery Applications of Silk Nanoparticles
09:03

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Published on: October 8, 2016

Polymers and drug delivery systems.

Gemma Vilar1, Judit Tulla-Puche, Fernando Albericio

  • 1Institute for Research in Biomedicine, Barcelona Science Park, Baldiri Reixac 10, 08028-Barcelona, Spain. albericio@irbbarcelona.org

Current Drug Delivery
|May 30, 2012
PubMed
Summary
This summary is machine-generated.

Polymeric drug delivery systems offer enhanced therapeutic outcomes by controlling drug concentration and distribution. These advanced formulations overcome limitations of conventional drugs, improving treatment efficacy.

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Manufacture and Drug Delivery Applications of Silk Nanoparticles
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Published on: October 8, 2016

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10:53

Anionic Polymerization of an Amphiphilic Copolymer for Preparation of Block Copolymer Micelles Stabilized by π-π Stacking Interactions

Published on: October 10, 2016

Area of Science:

  • Pharmaceutical Sciences
  • Biomaterials Engineering
  • Drug Delivery Systems

Background:

  • Conventional drug delivery faces challenges like degradation, off-target interactions, and poor tissue penetration, limiting therapeutic efficacy.
  • Achieving sustained therapeutic drug concentrations at the site of action is crucial for treating various health dysfunctions.
  • Current limitations necessitate the development of advanced drug formulations for improved pharmacological responses.

Purpose of the Study:

  • To explore the potential of polymeric systems as advanced drug carriers for controlled drug delivery.
  • To investigate how polymeric systems can overcome the limitations of conventional pharmaceutical agents.
  • To highlight the significance of tailored polymer properties for effective drug delivery mechanisms.

Main Methods:

  • Review of various polymeric drug delivery systems, including nanoparticles, microparticles, dendrimers, nanospheres, microspheres, capsosomes, and micelles.
  • Discussion of drug encapsulation and conjugation within polymer matrices.
  • Analysis of the physicochemical properties of polymers required for controlled release mechanisms.

Main Results:

  • Polymeric systems enable time- and distribution-controlled drug delivery, optimizing therapeutic outcomes.
  • A variety of polymeric structures (e.g., nanoparticles, micelles) can encapsulate or conjugate drugs.
  • These systems have demonstrated utility in diverse therapeutic areas, including cancer, infections, inflammation, and vaccination.

Conclusions:

  • Polymeric drug carriers represent a significant advancement in pharmaceutical formulations.
  • These systems offer a versatile platform for overcoming drug delivery challenges and enhancing treatment efficacy.
  • The development of novel polymeric drug delivery systems holds promise for a wide range of medical applications.