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Site-Targeted Drug Delivery Systems: Polymeric Carriers

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.

Cellular Membranes and Drug Transport

Cellular Membranes and Drug Transport

Drugs must traverse multiple biological barriers, such as multi-layered skin, single-layered intestinal epithelium, and the plasma membrane, to reach their target sites within the body. The plasma membrane, a highly structured composite of phospholipids, carbohydrates, and proteins, is the cell's protective boundary, facilitating selective substance exchange.
Phospholipids arrange themselves into a bilayer, with hydrophilic heads oriented outward and hydrophobic tails facing inward.

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Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are employed to...

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Related Experiment Video

Updated: Jun 24, 2026

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Published on: October 8, 2016

Nanoparticles in cellular drug delivery.

Amir H Faraji¹, Peter Wipf

¹Center for Chemical Methodologies & Library Development and Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260, USA.

Bioorganic & Medicinal Chemistry

|March 21, 2009

Summary

This summary is machine-generated.

This review covers nanoparticle properties for targeted drug delivery, focusing on cellular and organelle targets, pharmacokinetics, and modifications. It explores nanoparticle applications in treating cancers and central nervous system diseases.

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Targeted Plasma Membrane Delivery of a Hydrophobic Cargo Encapsulated in a Liquid Crystal Nanoparticle Carrier

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Published on: February 8, 2017

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Last Updated: Jun 24, 2026

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Manufacture and Drug Delivery Applications of Silk Nanoparticles

Published on: October 8, 2016

Targeted Plasma Membrane Delivery of a Hydrophobic Cargo Encapsulated in a Liquid Crystal Nanoparticle Carrier

Targeted Plasma Membrane Delivery of a Hydrophobic Cargo Encapsulated in a Liquid Crystal Nanoparticle Carrier

Published on: February 8, 2017

Area of Science:

Biomedical Engineering
Nanotechnology
Pharmacology

Background:

Nanoparticles offer advanced drug delivery systems.
Targeted delivery enhances therapeutic efficacy and reduces side effects.
Understanding nanoparticle properties is crucial for effective drug development.

Purpose of the Study:

To review nanoparticle properties for targeted drug delivery.
To discuss pharmacokinetic profiles and modifications for therapeutic applications.
To highlight nanoparticle utility in treating cancers and CNS diseases.

Main Methods:

Literature review of nanoparticle properties and applications.
Analysis of biological pathways exploited by nanoparticles.
Discussion of case studies in cancer and CNS disease treatment.

Main Results:

Nanoparticles can target specific cells and organelles.
Pharmacokinetic properties can be modified for improved delivery.
Nanoparticles show promise in treating glioblastoma, neurovascular, and neurodegenerative diseases.

Conclusions:

Nanoparticles are versatile tools for targeted drug delivery.
Exploiting biological pathways enhances payload delivery, including across the blood-brain barrier.
Further research into nanoparticle applications holds significant therapeutic potential.