Link: Science Blog.
A study on bladder cancer cells lines showed that green tea extract has potential as an anti-cancer agent, proving for the first time that it is able to target cancer cells while leaving healthy cells alone. The study, published in the Feb. 15, 2005 issue of the peer-reviewed journal Clinical Cancer Research, also uncovered more about how green tea extract works to counteract the development of cancer.
Numerous epidemiologic and animal studies have suggested that green tea extract provides strong anti-cancer effects in several human cancers, including bladder cancer. It has been shown to induce death in cancer cells, as well as inhibiting the development of an independent blood supply that cancers develop so they can grow and spread.
In the UCLA study … scientists were able to show that green tea extract interrupts a process that is crucial in allowing bladder cancer to become invasive and spread to other areas of the body.