The search continues for ideas for replacing human tissue. The undoubted successes of scientists include the first steps in printing organs on a 3D printer. The researchers have now managed to grow blood vessels in a laboratory setting.
A common problem with previously existing solutions was the tendency to infections and the rejection of new tissues by the body, as well as the considerable time for their growth.
A team of researchers at Duke University, Yale University and tissue engineering company Humacyte have grown unusual vessels. They do not contain living cells, and, consequently, no components capable of causing tissue rejection. All this will allow you to create the necessary supply of implants in advance, which will always be at hand with doctors.
Arteries are grown from human vascular cells in tissue culture placed in a vascular scaffold. If the necessary conditions are met, the tissue grows and receives the properties of living blood vessels. After eight weeks, the scaffold disappears, and in its place a tissue with the structure of a blood vessel is formed. The remaining cells are washed out with a special solution, after which the vessel is ready for implantation.
Experiments on the implantation of blood vessels in patients with renal failure have yielded positive results. Even after a year, they showed no signs of rejection. Moreover, scientists have documented the replacement of artificial tissue with living cells from patients.