Tag: hydrogel

Scientists report new hydrogel to protect wounds from germs

RUDN University and Shahid Beheshti University (SBU) chemist together with colleagues from Iran created a hydrogel film for wound dressing. It protects the wound from germs and is harmless to healthy tissues. Moreover, its porous structure can hold antibiotic, which kills dangerous microorganisms and provide additional protection. The results are published in the International Journal of Biological Macromolecules.

The main aim in treating wounds is to prevent infection. With an open wound, microbes gain direct access inside the body. This significantly complicates wound healing and can cause more serious consequences, so it is important to develop antibacterial coatings for wounds. One of the modern approaches to this is hydrogel films. Unlike traditional remedies, hydrogels mimic healthy tissue and cover the wound, protecting it from germs. They also help to cool the wound and not over-dry it. In addition, hydrogels can contain … read more

The Hemostatic and Wound Healing Effect of Chitosan Following Debridement of Chronic Ulcers

Chitosan has been proven to be helpful in wound care as a hemostatic agent. The hemostatic effect is due to the positively charged chitosan interacting with negatively charged red blood cell membranes, initiating the agglutination of red blood cells and platelets. This promotes the activation of thrombin, which activates the clotting pathway, leading to thrombus formation. Objective. Based on the properties of chitosan as a rapidly acting hemostatic agent, the authors sought to determine if a chitosan gelling fiber wound dressing could control bleeding of freshly debrided wounds. The effect of the chitosan dressing on overall healing and patient and provider satisfaction was also evaluated. Materials and Methods. Wounds of any etiology requiring sharp debridement in patients older than 18 years who were capable of consent were eligible. Wounds were sharply debrided by curettage … read more

Oxygen-delivering hydrogel accelerates diabetic wound healing

About one-fourth of people with diabetes develop painful foot ulcers, which are slow to heal due to low oxygen in the wound from impaired blood vessels and increased inflammation. These wounds can become chronic, leading to poor quality of life and potential amputation … ianjun Guan, professor of mechanical engineering and materials science at the McKelvey School of Engineering at Washington University in St. Louis, has developed a hydrogel that delivers oxygen to a wound, which decreases inflammation, helps remodel tissue and accelerates healing. Results of the work, which were in a mouse model, are published Aug. 28 in Science Advances. Ya Guan, a doctoral student, and Hong Niu, a postdoctoral research associate, both in Guan’s lab, are co-first authors … read more

Hydrogel could totally change treatment of diabetic wounds

A hydrogel that can help the body heal may also be particularly good at treating wounds related to diabetes, new research suggests.

 

Tests on diabetic animal models show that the injectable hydrogel significantly accelerates wound healing compared with another hydrogel often used in clinics.

 

The multidomain peptide (MDP) hydrogel known by its amino acid sequence—K2(SL)6K2—has in a recent study proven useful for the timed release of immunotherapy drugs. It has also been shown to encourage healing all by itself.

 

That quality may be useful for people with diabetes mellitus who often develop chronic wounds in their lower extremities that take longer to heal than normal wounds do … read more

Moldable Hyaluronan Hydrogel Enabled by Dynamic

     Metal–Bisphosphonate Coordination Chemistry for Wound Healing

 

Biomaterial‐based regenerative approaches would allow for cost‐effective off‐the‐shelf solution for the treatment of wounds. Hyaluronan (HA)‐based hydrogel is one attractive biomaterial candidate because it is involved in natural healing processes, including inflammation, granulation, and reepithelialization. Herein, dynamic metal–ligand coordination bonds are used to fabricate moldable supramolecular HA hydrogels with self‐healing properties. To achieve reversible crosslinking of HA chains, the biopolymer is modified with pendant bisphosphonate (BP) ligands using carbodiimide coupling and chemoselective “click” reactions. Hydrogel is formed immediately after simple addition of silver (Ag+) ions to the solution of HA containing BP groups (HA‐BP). Compared with previous HA‐based wound healing hydrogels, the HA‐BP·Ag+ hydrogel is highly suitable for clinical use as it can fill irregularly shaped wound defects without the need for premolding. The HA‐BP·Ag+ hydrogel shows antimicrobial properties to both Gram‐positive and Gram‐negative bacterial strains, enabling prevention of infections in wound care. In vivo evaluation using a rat full‐thickness skin wound model shows significantly lower wound remaining rate and a thicker layer of regenerated epidermis as compared with the group left without treatment. The presented moldable and self‐healing supramolecular HA hydrogel with “ready‐to‐use” properties possesses a great potential for regenerative wound treatment … read more

Injectable gel holds promise as wound-healing material

 

A research team led by UCLA biomolecular engineers and doctors has demonstrated a therapeutic material that could one day promote better tissue regeneration following a wound or a stroke.


During the body’s typical healing process, when tissues like skin are damaged the body grows replacement cells. Integrins are class of proteins that are important in the cellular processes critical to creating new tissue. One of the processes is cell adhesion, when new cells “stick” to the materials between cells, called the extracellular matrix. Another is cell migration, where at the cell’s surface, integrins help “pull” the cell along through the extracellular matrix to move cells into place. However, these processes do not occur in brain tissue that has been damaged during a stroke. This is why scientists are trying to develop therapeutic materials that could promote this form of healing.

 

The injectable gel-like material, which is called a hydrogel, that the UCLA researchers developed helps this repair process by forming a scaffold inside the wound … read more

 

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