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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...
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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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Drug Delivery: Parenteral Route

The parenteral route is a critical method of drug administration. It delivers compounds directly into the systemic circulation and bypasses the gastrointestinal tract. This approach is particularly advantageous for drugs that exhibit poor absorption or instability when administered orally.
There are three primary parenteral routes: intravenous (IV), intramuscular (IM), and subcutaneous (SC). The IV route introduces the drug directly into the bloodstream, ensuring immediate action. The IM route...
The Blood-brain Barrier00:49

The Blood-brain Barrier

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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...

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Related Experiment Video

Updated: Jun 21, 2026

Delivery of Therapeutic siRNA to the CNS Using Cationic and Anionic Liposomes
10:33

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Published on: July 23, 2016

Colloidal polymeric nanoparticles and brain drug delivery.

Najeh Maissar Khalil1, Rubiana Mara Mainardes

  • 1Departamento de Farmácia - Universidade Estadual do Centro-Oeste / UNICENTRO - Guarapuava, Brasil.

Current Drug Delivery
|July 17, 2009
PubMed
Summary

Polymeric nanoparticles offer a promising strategy to overcome the blood-brain barrier, enabling enhanced drug delivery for central nervous system disorders. This review explores current approaches utilizing these nanoparticles for brain drug delivery.

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Area of Science:

  • Neuroscience
  • Biomaterials Science
  • Pharmacology

Background:

  • The blood-brain barrier (BBB) restricts the entry of therapeutic agents into the central nervous system (CNS).
  • BBB presents a significant challenge for developing effective treatments for neurological diseases due to poor drug distribution and efflux mechanisms.
  • Existing drug delivery methods often fail to adequately penetrate the BBB.

Purpose of the Study:

  • To review current strategies for overcoming the BBB for enhanced drug delivery to the brain.
  • To emphasize the role and characteristics of polymeric nanoparticles in brain drug delivery.
  • To highlight the potential of polymeric nanoparticles as efficient colloidal systems for CNS therapeutics.

Main Methods:

  • Literature review of scientific publications on brain drug delivery and polymeric nanoparticles.
  • Analysis of strategies employed to enhance drug transport across the BBB.
  • Focus on the properties and applications of polymeric nanoparticles in CNS drug delivery.

Main Results:

  • Polymeric nanoparticles are identified as effective colloidal systems for brain drug delivery.
  • Various strategies exist to facilitate drug transport across the BBB.
  • Understanding nanoparticle properties is crucial for successful brain targeting.

Conclusions:

  • Polymeric nanoparticles represent a viable approach to circumvent the BBB.
  • Further research into nanoparticle characteristics can optimize CNS drug delivery.
  • Targeted brain drug delivery using nanoparticles holds significant therapeutic potential for neurological disorders.