Researchers at the College of Texas at Dallas have found a formerly obscure "housekeeping" process in kidney cells that launches undesirable substances, bringing about cells that restore themselves and stay working and sound. The self-renewal process, which is fundamentally different from how other bodily tissues are thought to regenerate, helps explain how the kidneys can stay healthy for a lifetime if they are unaffected by injury or disease. In a study that was published on April 17 in Nature Nanotechnology, the researchers provided a description of the mechanism. In contrast to the liver and skin, where cells separate to make