Global Biotechnology Insights
Jan 14, 2022
Regrowing Knee Cartilage with an Electric Kick
Bioengineers successfully regrew cartilage in a rabbit's knee and they've discovered that electrical signals are key to normal growth. They designed a tissue scaffold made out of nanofibers of poly-L lactic acid that has a neat property called piezo-electricity. When it is squeezed, it produces a little burst of electrical current. The regular movement of a joint, such as a person walking, can cause the PLLA scaffold to generate a weak but steady electrical field that encourages cells to colonize it and grow into cartilage.