title: Decreased expressions of c-myc and H-ras oncogenes in vitamin E succinate induced morphologically differentiated murine B-16 melanoma cells in culture.
abstract: Treatment of B-16 melanoma cells in culture with d-alpha-tocopheryl succinate (vitamin E succinate) at concentrations of 11.3 and 15.1 microM inhibited growth and induced cell differentiation in culture. Vitamin E succinate treatment decreased the levels of c-myc and H-ras specific mRNAs in melanoma cells. Similar results were obtained by the vitamin retinoic acid and the nonvitamin agents R020-1724 (4-(3-butoxy-4-methoxybenzyl)-2-imidazolidinone), an inhibitor of cyclic nucleotide phosphodiesterase (0.72 mM), and sodium butyrate (1 mM), which induced differentiation and (or) inhibited growth of melanoma cells in culture. The extent of inhibition of c-myc mRNA was greater than that of H-ras mRNA. These results indicate that vitamin E succinate induced reduction of the levels of c-myc and H-ras mRNAs is related to growth inhibition of melanoma cells in culture.
authors.affiliation: Department of Radiology, University of Colorado Health Sciences Center, Denver 80262.
authors.forename: K N
authors.initials: KN
authors.lastname: Prasad
authors.forename: R J
authors.initials: RJ
authors.lastname: Cohrs
authors.forename: O K
authors.initials: OK
authors.lastname: Sharma
mesh_terms: D012368:4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinone / Q000494:pharmacology; D000818:Animals; D002087:Butyrates / Q000494:pharmacology; D020148:Butyric Acid; D002454:Cell Differentiation / Q000187:drug effects / Q000235:genetics; D000242:Cyclic AMP / Q000378:metabolism; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects*; D008546:Melanoma, Experimental / Q000235:genetics*; D051379:Mice; D009363:Neoplasm Proteins / Q000096:biosynthesis*; D016271:Proto-Oncogene Proteins c-myc / Q000235:genetics*; D016283:Proto-Oncogene Proteins p21(ras) / Q000235:genetics*; D012333:RNA, Messenger / Q000378:metabolism; D012334:RNA, Neoplasm / Q000378:metabolism; D024505:Tocopherols; D014212:Tretinoin / Q000494:pharmacology; D014407:Tumor Cells, Cultured; D014810:Vitamin E / Q000031:analogs & derivatives* / Q000494:pharmacology
chemical_list: D002087:Butyrates; D009363:Neoplasm Proteins; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D012334:RNA, Neoplasm; D020148:Butyric Acid; D014810:Vitamin E; D012368:4-(3-Butoxy-4-methoxybenzyl)-2-imidazolidinone; D014212:Tretinoin; D000242:Cyclic AMP; D016283:Proto-Oncogene Proteins p21(ras); D024505:Tocopherols