Cancer is a chronic inflammation caused by bacterial or even viral infections. The MIT study focuses on liver and colon cancer and was done on mice which were infected with a bacterium similar to Helicobacter pylori (a well known bacterium found in humans that often causes cancer).
MIT wanted to improve the way we can predict the effects and development of cancer. This way it might be possible to develop more efficient drugs to stop the inflammation. If the human body develops such inflammation and this is sustained for a long period of time then cancer develops. It is vital to detect it in time and stop it so that cancer is prevented.