For the first time, Salk scientists have grown human stem cells into early-stage ureteric buds, kidney structures responsible for reabsorbing water after toxins have been filtered out. In the laboratory, they used mouse embryonic kidney cells (seen here in red) to coax the human stem cells to grow into the nascent mushroom-shaped buds (blue and green). Their discovery is a major step in developing regenerative techniques for growing replacement human kidneys. Image: Salk Institute for Biological Studies
