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Oral drug turns on silenced genes, turns off cancer

Oral administration of a drug that inhibits a process known as DNA methylation results in a reduction in the size of malignant tumors in mice, according to a team of researchers led by scientists from the Keck School of Medicine of the University of Southern California. The drug, called zebularine, accomplishes its tumor-whittling by turning on tumor suppressor genes that have been turned off by methylation.