Diet Affects metastasis via epigenetics

www.sciencedaily.com/releases/2012/08/120827152050.htm

Article suggests long-term diet can affect epigenetic expression to impact cancer spread. (Does not suggest cure.)

That's a tough question. I followed the link to the journal abstract which was written by a professor of pharmacy. The journal article costs $40 and leads to other journal articles that cost money. Am not willing to buy these articles. Am thinking the book "Anticancer" covers some of these.
The article mentioned "amino acids [protein], vitamin D, ethanol, ginseng extract, the tomato carotenoid lycopene, the turmeric component curcumin, pomegranate juice, fish oil and others affecting gene expression in breast, colorectal, prostate, skin, lung and other cancers." I don't believe ginseng extract would help prostate cancer.

I believe from my reading you could add green tea, broccoli, bok choy, cabbage, garlic, ginger, berries , oregano and basil. Milk thistle, mushroom and quercetin also.
A lot of research is going on right now about epigenetics (how genes have on and off switches and what substances affect gene expression. The article did not suggest a cure using these foods.
Robert C