Burn injuries are among the most painful and challenging wounds doctors treat. Every year, millions of people around the world suffer burns caused by fire, hot liquids, chemicals, electricity, or other accidents.
Depending on the severity of the injury, burns can take weeks or even months to heal. Some patients are left with permanent scars, reduced movement, chronic pain, or infections that can seriously affect their quality of life.
For severe burns, doctors often rely on skin grafts. In this procedure, healthy skin is removed from another part of the patient’s body and transplanted onto the damaged area. While skin grafts can save lives and improve healing, they also create a second wound that must heal.
In addition, patients with extensive burns may not have enough healthy skin available for grafting. Because of these challenges, researchers have spent years searching for safer and less invasive ways to help burn wounds heal.
A research team from the Terasaki Institute for Biomedical Innovation and the University of Arizona College of Medicine has now developed a promising new treatment that may offer another option. Their study, published in the journal Biomaterials, describes a special gel that helped burn wounds heal much faster in laboratory and animal studies.
The treatment combines a drug called 4-aminopyridine, also known as 4-AP, with a gel made from laponite and gelatin. The drug itself is not new. It is already approved by the U.S. Food and Drug Administration and is used to help people with multiple sclerosis improve their walking ability. The medication is sold under the brand name Ampyra.
Scientists had previously discovered that 4-AP could affect important skin cells involved in wound repair. These cells include keratinocytes, which help rebuild the outer layer of skin, and fibroblasts, which help create new tissue during healing.
However, using the drug throughout the entire body can cause serious side effects, including seizures, making it unsuitable as a routine treatment for wound healing.
To solve this problem, the researchers created a gel that delivers the drug directly to the burn wound. This local delivery means that the medicine stays where it is needed most rather than circulating throughout the body. As a result, the treatment may provide healing benefits while greatly reducing the risk of dangerous side effects.
The team first tested the gel in the laboratory. They found that it released the drug gradually over time and was safe for living cells. The results were encouraging. More than 90% of wounds closed within 48 hours under laboratory conditions.
The researchers then tested the gel in animal models. Beginning around day six, wounds treated with the gel started healing noticeably faster than untreated wounds. By day 21, the treated wounds had almost completely closed, while many untreated wounds remained partly open.
Further examination revealed several reasons for the improved healing. The gel reduced inflammation, which is one of the major factors that can delay recovery. It also helped new skin form across the wound surface and encouraged the growth of new blood vessels that bring oxygen and nutrients to healing tissue.
The treatment also increased collagen production. Collagen is a protein that acts as a structural framework for skin and other tissues. Healthy collagen production is essential for strong and durable wound repair.
The researchers found major increases in important forms of collagen, suggesting that the healed tissue was not only closing faster but also developing better quality skin.
According to the research team, the fact that 4-AP is already an approved medication could speed up future development. Instead of creating an entirely new drug, researchers are repurposing an existing one whose safety profile is already well understood. This may help move the treatment toward human clinical trials more quickly.
At the end of the study, the researchers emphasized that more testing is still needed before the gel can be used in hospitals. Human clinical trials will be required to confirm its safety and effectiveness in patients with burns.
The findings represent an important advance in burn care. Current treatments can be painful, costly, and time-consuming. A simple gel that speeds healing while avoiding invasive procedures could greatly improve recovery for many patients.
If future studies confirm these results, this new treatment may eventually help reduce scarring, shorten recovery times, and lower the burden of burn injuries on healthcare systems.
Study analysis: The study provides strong early evidence that targeted delivery of 4-AP may significantly improve burn healing.
One major strength is the use of an FDA-approved drug, which could accelerate future development. Another strength is that the treatment improved multiple aspects of healing, including inflammation control, blood vessel growth, and collagen formation.
However, the research has not yet been tested in human patients, so it is still too early to know whether the same benefits will occur in clinical practice. Nevertheless, the results are highly promising and suggest that this approach deserves further investigation.
If you care about skin health, please read studies about top signs of diabetic skin disease, and Mediterranean diet could help lower the skin cancer risk.
For more health information, please see recent studies about eating fish linked to higher risk of skin cancer, and results showing how to combat the effects of aging on your skin.
Source: University of Arizona College of Medicine and Terasaki Institute for Biomedical Innovation.
