A new cancer therapy that uses nanotechnology has effectively cured terminal breast cancer in tests on mice.The "astounding" research has raised hopes of a cure based on the delivery of drugs to vital organs using a technique that bypasses cell defences resistant to treatment.In tests on mice with incurable breast cancer that had spread to the lungs, half were free of the disease for at least eight months - the equivalent of 24 years in humans.Scientists said that even if the effects could be partly transferred to humans, it would represent a significant breakthrough for metastatic cancers where the disease has spread from the breast to other parts of the body."We are talking about changing the landscape of metastatic disease, so it's no longer a death sentence."Mauro Ferrari, president of the Houston Methodist Research Institute in Texas, said clinical trials on human patients could begin as early as next year.UK experts warned that more research was needed. ..