Researchers at the Ohio State University Comprehensive Cancer Centre examined the effect of freeze-dried black raspberries - which are different to blackberries - on genes which had been altered by a cancer-causing chemical in animals.
They found that while the cancer-causing chemical altered the activity of 2,200 genes, in mice treated with powdered black raspberries, 460 of these genes were restored to normal activity.
The findings are published in the journal Cancer Research.
Principal investigator Dr Gary Stoner, professor of pathology, human nutrition and medicine, commented: "We have clearly shown that berries, which contain a variety of anti-cancer compounds, have a genome-wide effect on the expression of genes involved in cancer development."
Dr Stoner also revealed that black raspberries contain a range of vitamins, minerals, plant phenols and phytosterols, many of which have previously been shown to prevent cancer in animal studies.