A team of scientists bioprinted a vascularized skin graft

Researchers at Rensselaer Polytechnic Institute in New York and Yale Medical School have bioprinted vascularized skin tissues, which were successfully tested on a mouse. Apparently, the skin managed to connect to the animal’s blood vessels. For the medical sector, this advance could well solve the challenges associated with the rejection of grafted tissue and thus considerably facilitate all skin grafts.

3D bioprinting of skin is not new in the medical sector; many researchers are looking to reproduce skin tissues whether to treat wounds and burns, serve reconstructive surgery, or even for astronauts. On the other hand, few projects have attempted to include blood vessels in them, a method that could allow the patient to assimilate the grafted tissue much more quickly. This is what this team of American researchers, led by Pankaj Karande, associate professor of chemical and biological engineering, has done. He explains: “At the moment, everything that is available as a clinical product looks more like a sophisticated dressing. It allows accelerated wound healing, but eventually falls off. It never really integrates into the host cells.“

The researchers used a bioprinter to create their vascularized skin tissue

The process of creating bioprinted vascularized skin

The researchers explain that they have combined cells from human blood vessels (endothelial cells and human pericyte cells) with other materials, including collagen of animal origin and structural cells, to make a bioink. A bioprinter, CELLINK’s Bio X to be more precise, then deposited it layer by layer, and the cells began to communicate with each other and form a vascular structure within a few days.