Drugs being developed to treat cancer may also help children with a disease called progeria, which accelerates aging and often kills patients when they are in their teens, U.S. researchers reported on Tuesday.The researchers found a group of drugs known as farnesyltransferase inhibitors or FTIs could restore the normal shape of cells damaged by Hutchinson-Gilford progeria syndrome or HGPS.The drugs are already being tested in children and appear to be safe, the researchers said in two separate reports published in the Proceedings of the National Academy of Sciences.