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Open AccessJournal ArticleDOI

Drug release kinetics and transport mechanisms of non-degradable and degradable polymeric delivery systems

Yao Fu, +1 more
- 23 Mar 2010 - 
- Vol. 7, Iss: 4, pp 429-444
TLDR
An overview of structure-function relationships of selected non-degradable and degradable polymers as drug delivery matrices is provided to help elucidate the solute transport mechanisms.
Abstract
Importance of the field: The advancement in material design and engineering has led to the rapid development of new materials with increasing complexity and functions. Both non-degradable and degradable polymers have found wide applications in the controlled delivery field. Studies on drug release kinetics provide important information into the function of material systems. To elucidate the detailed transport mechanism and the structure-function relationship of a material system, it is critical to bridge the gap between the macroscopic data and the transport behavior at the molecular level.Areas covered in this review: The structure and function information of selected non-degradable and degradable polymers have been collected and summarized from literature published after the 1990s. The release kinetics of selected drug compounds from various material systems is discussed in case studies. Recent progress in the mathematical models based on different transport mechanisms is highlighted.What the reader wil...

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Citations
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Effect of process and formulation variables on the preparation of parenteral paclitaxel-loaded biodegradable polymeric nanoparticles: A co-surfactant study

TL;DR: It was concluded that the particle size of the nanoparticles could be reduced further and the paclitaxel release kinetics could easily be adjusted by taking advantage by the inclusion of a co-surfactant.
Journal ArticleDOI

Temperature Treatment of Highly Porous Zirconium-Containing Metal-Organic Frameworks Extends Drug Delivery Release

TL;DR: It is found that addition of a model drug compound into the MOF and the subsequent temperature treatment process does not affect the rate of MOF uptake by the cell, and endocytosis analysis revealed that MOFs are internalized by active transport and that inhibiting the caveolae-mediated pathway significantly reduced cellular uptake of MOFs.
References
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Journal ArticleDOI

Mechanism of sustained‐action medication. Theoretical analysis of rate of release of solid drugs dispersed in solid matrices

TL;DR: The analyses suggest that for the latter system the time required to release 50% of the drug would normally be expected to be approximately 10 per cent of that required to dissolve the last trace of the solid drug phase in the center of the pellet.
Journal ArticleDOI

A simple equation for description of solute release I. Fickian and non-fickian release from non-swellable devices in the form of slabs, spheres, cylinders or discs

TL;DR: In this paper, a simple exponential relation Mt/M∞ = ktn is introduced to describe the general solute release behavior of controlled release polymeric devices, where Mt is the fractional release, t is the release time, k is a constant, and n is the diffusional exponent characteristic of the release mechanism.
Journal ArticleDOI

New methods of drug delivery.

TL;DR: Conventional forms of drug administration generally rely on pills, eye drops, ointments, and intravenous solutions, but a number of novel drug delivery approaches have been developed, which may revolutionize the way many drugs are delivered.
Journal ArticleDOI

On the importance and mechanisms of burst release in matrix-controlled drug delivery systems

TL;DR: Experimental observations of burst release in monolithic polymer controlled drug delivery systems, theories of the physical mechanisms causing burst, some of the unique ideas used to prevent burst, and the treatment of burstRelease in controlled release models are reviewed.
Journal ArticleDOI

Hydrogels in controlled release formulations: network design and mathematical modeling

TL;DR: The objective of this article is to review the fundamentals and recent advances in hydrogel network design as well as mathematical modeling approaches related to controlled molecule release from hydrogels.
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