Drug Loaded Hydrogels
Drug Loaded Hydrogels - Related Videos
10:28
An Injectable and Drug-loaded Supramolecular Hydrogel for Local Catheter Injection into the Pig Heart
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Cited by 21 •
2015
Supramolecular hydrogelators based on ureido-pyrimidinones allow full control over the macroscopic gel properties and the sol–gel switching behavior using pH. Here, we present a protocol for formulating and injecting such a supramolecular hydrogelator via a catheter delivery system for local delivery directly in relevant areas in the pig heart.
09:39
Constructing a Collagen Hydrogel for the Delivery of Stem Cell-loaded Chitosan Microspheres
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Cited by 6 •
2012
A major hurdle in current stem cell therapies is determining the most effective method to deliver these cells to host tissues. Here, we describe a chitosan-based delivery method that is efficient and simple in approach, while allowing adipose-derived stem cells to maintain their multipotency.
08:33
Hydrogel Synthesis
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2023
Source: Amber N. Barron, Ashlea Patterson, and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT Hydrogels are a versatile class of cross-linked polymers produced through relatively simple procedures and with generally inexpensive materials. They can be formed from solution and involve a polymer backbone formed from monomer reagents, an initiator which makes the polymer reactive and a crosslinking species which binds the polymer chains...
07:25
Collagen Hydrogels
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2023
Collagen is another widely used biomaterial that has found popularity in commercial applications, such as photography. Collagen has more recently been used in tissue engineering applications, by creating hydrogels that provide structure to engineered tissue. This video introduces collagen as a biomaterial, demonstrates how it is harvested from porcine skin, and shows how the material is used to create a hydrogel for tissue engineering applications. Finally, several applications of the material...
07:32
Preparation and Characterization of Individual and Multi-drug Loaded Physically Entrapped Polymeric Micelles
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Cited by 11 •
2015
The goal of this protocol is to describe the preparation and characterization of physically entrapped, poorly water soluble drugs in micellar drug delivery systems composed of amphiphilic block copolymers.
FAQs
Release is governed by how readily drug molecules move through the swollen polymer network. Changes in crosslink density alter the network structure and therefore can modify drug transport by diffusion. Polymer degradation may also contribute to release over time. Considering these factors together helps bioengineers regulate delivery timing while maintaining a hydrated matrix suitable for therapeutic use.
Environmental pH can influence how a drug moves through the hydrogel and may change the resulting release behavior. Because hydrogels operate within biological environments that can vary, pH should be considered alongside polymer composition, crosslinking, and degradation. Accounting for this condition helps researchers anticipate whether the material will provide consistent or environment-responsive therapeutic delivery.
Diffusion moves therapeutic compounds through the water-filled spaces of the swollen network, while polymer degradation can alter the matrix itself and affect how compounds become available. These mechanisms may operate together rather than independently. Distinguishing their contributions helps researchers interpret release over time and connect observed delivery behavior with the hydrogel’s structure and composition.
The hydrogel’s tunable composition links material design with drug stability and cellular interactions. A formulation must therefore support the incorporated compound while presenting a matrix compatible with the intended biological setting. Evaluating these relationships is important in bioengineering because a release profile alone does not determine therapeutic performance; matrix behavior and cellular responses also influence the overall outcome.
The material format is selected according to the therapeutic and tissue context. Injectable systems can place therapy at a targeted site, wound dressings can provide a hydrated treatment matrix, and scaffolds can combine localized delivery with support for tissue repair. Each application requires coordinating hydrogel composition, drug release behavior, and interactions with the surrounding biological environment.
Design decisions include the polymer network, physical or chemical crosslinks, drug stability, crosslink density, degradation behavior, and environmental conditions such as pH. Researchers also consider whether the system will serve as an injectable material, wound dressing, or scaffold. Balancing these variables helps align localization, release over time, cellular interactions, and the intended therapeutic performance.
These systems are relevant when therapy should be localized and released over time rather than distributed immediately throughout the body. Bioengineering applications include tissue-repair strategies, disease treatment, wound care, injectable delivery, and scaffold-based approaches. Their importance comes from connecting material design with drug behavior, cellular interactions, and the possibility of reducing systemic exposure while supporting therapeutic goals.