Viagra can prevent Cancer?

From the Johns Hopkins Cancer Center: Sildenafil and other “impotence drugs� that boost the production of a gassy chemical messenger to dilate blood vessels and produce an erection now also show promise in unmasking cancer cells so that the immune system can recognize and attack them, say scientists at the Johns Hopkins Kimmel Cancer Center. The new Hopkins study homes in on a tactic used by cancers to avoid detection by the immune system by turning elements of that system to its own advantage, says Ivan Borrello, M.D., assistant professor at the Johns Hopkins Kimmel Cancer Center. Borrello and his colleagues found that tumors exploit nitric oxide-producing immune cells to create a sort of “fog� that keeps them hidden from white blood cells (T-cells) that mount attacks on tumors.
Won't the drug companies love this news.