Related Experiment Video
Updated: Jul 10, 2026
07:32
Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
Published on: August 28, 2015
Polymeric micelles for drug targeting
Abdullah Mahmud1, Xiao-Bing Xiong, Hamidreza Montazeri Aliabadi
1Faculty of Pharmacy and Pharmaceutical Sciences, University of Alberta, Edmonton, Alberta, Canada.
Journal of Drug Targeting
|October 31, 2007
Summary
Polymeric micelles are advanced nano-delivery systems showing promise for targeted drug delivery. Research has advanced through three generations, enhancing specificity and efficiency for treating diseases.
Area of Science:
- Nanotechnology
- Materials Science
- Pharmacology
Background:
- Polymeric micelles self-assemble from amphiphilic block copolymers in aqueous solutions.
- They offer nanoscopic dimensions, stealth properties, and capacity for hydrophobic drug encapsulation.
- Their core-shell structure allows for chemical modification, enhancing drug targeting potential.
Purpose of the Study:
- To review the development of three generations of polymeric micellar drug delivery systems.
- To assess the overall success of polymeric micelles in drug targeting applications.
- To emphasize the design of advanced micelles for enhanced targeting.
Main Methods:
- Review of research efforts in polymeric micellar delivery systems.
- Analysis of passive, active, and multifunctional targeting strategies.
- Focus on ligand modification, stimuli-responsive, and multifunctional designs.
Main Results:
- Development of three generations of polymeric micelles, each with improved targeting specificity and efficiency.
- Demonstration of polymeric micelles as promising carriers for drug targeting.
- Advancements in ligand-modified, stimuli-responsive, and multifunctional micellar systems.
Conclusions:
- Polymeric micelles represent a highly promising platform for targeted drug delivery.
- Continued research into advanced designs like ligand-modified and stimuli-responsive micelles is crucial.
- These systems show significant potential for improving therapeutic outcomes in various diseases.
Related Concept Videos
01:24Site-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...
01:24Modified-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.
01:30Micelles
Micelle formation is an intricate process that hinges on the properties of amphiphilic or amphipathic molecules and the conditions of the system in which they are found. Amphiphilic molecules, which have both hydrophilic (water-attracting) and hydrophobic (water-repelling) parts, play a critical role in this process.In aqueous environments, these molecules arrange themselves such that their hydrophilic heads are turned towards the water phase, while their hydrophobic tails are oriented away...
01:26Targets for Drug Action: Overview
Drugs target macromolecules to modify ongoing cellular processes. Primary drug targets include receptors, ion channels, transporters, and enzymes.
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
Receptors are either membrane-spanning or intracellular proteins, which upon binding a ligand, get activated and transmit the signal downstream to elicit a response. Drugs bind receptors, either mimicking the action of endogenous ligands or blocking the receptor activity to bring about a modified response. Nearly 35% of approved drugs target the G...
01:23Modified-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...
01:19Modified-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...