How many times have you cut yourself and the wound did not finish healing well? Can you imagine a band-aid that does not leave a scar? We are so close! Our skin is exposed to damage such as blisters or cuts, and we usually use dressings or strips to cover it, but they are not really effective in preventing bacterial infections.
A team of researchers from the Wyss Institute of Biological Inspiration Engineering at Harvard University (USA), McGill University (USA) and the John A. Paulson School of Engineering and Applied Sciences at Harvard He has developed a band-aid that acts as the skin of developing embryos, allowing a cut or wound to heal without scarring on the skin .
Strips capable of healing without scarring
These peculiar strips, referred to as ‘active adhesive dressings (ADF)’, are able to heal wounds more quickly than other methods thanks to a system of heat-sensitive hydrogels that are also antimicrobial.
“This technology has the potential to be used not only for skin lesions but also for chronic wounds such as diabetic ulcers and pressure ulcers, for the administration of drugs and as components of therapies based on soft robotics,” said the study authors.
The study, which has been published in the journal ‘Science Advances’, has revealed how the skin of developing embryos can heal completely without leaving a scar mark on the skin. In this way, researchers have looked for ways to create a band-aid for the wound healing process based on this type of skin.
How have they carried out the study? The skin cells of the embryos around a cut generate fibres formed by the actin protein capable of contracting and joining the edges of a wound. The cells of our skin, on the other hand, do not have that capacity of contraction and give rise to scars.
Material that contracts according to body temperature
The experts added to the system of adhesive hydrogels a polymer that varies depending on body temperature, rejects water and contracts at 32 degrees Celsius. This material, which also has antimicrobial protection, has been successfully tested on the skin of pigs and mice, and the result is that it begins to contract when exposed to body temperature.
“The ‘active adhesive dressing (ADF)’ adhered to pigskin with more than ten times the adhesive strength of a band-aid, and prevented bacteria from growing, so this technology is already significantly better than protective products of most commonly used wounds, even before considering their suturing properties, ”said Benjamin Freedman of Mooney’s laboratory.
The scars may disappear in the not too distant future thanks to this new technique. And you, would you use them?