DIRAS3 and ovarian cancer: Our group has found that cancer cell proliferation,11, 12, 13 motility,14 autophagy and tumor dormancy15, 16 can be regulated by an imprinted tumor suppressor gene, ARHI (DIRAS3), that is downregulated in 60% of ovarian cancers by multiple mechanisms,17, 18 associated with shortened progression-free survival.19 Ovarian cancer cell sublines have been developed with tet-inducible expression of ARHI.