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Selenite-induced inhibition of colony formation by buthionine sulfoximine-sensitive and resistant cell lines. 1992

P B Caffrey, and G D Frenkel
Department of Biological Sciences, Rutgers University, Newark, NJ.

We previously demonstrated that treatment of HeLa cells with buthionine sulfoximine (BSO), which decreases the level of cellular glutathione, resulted in a decrease in the potency of selenite in inhibiting cell colony formation. We have now examined the effect of selenite on normal human lung fibroblast (CCL-210) cells, which resemble HeLa cells in their sensitivity to BSO, and on human lung adenocarcinoma (A549) cells, which are relatively insensitive to BSO. We have found that BSO treatment caused an approximately fourfold decrease in selenite potency in the CCL-210 cells, but had no significant effect on its potency in A549 cells. These results support the hypothesis that for selenite to exert its cytotoxic effect, it must undergo the reaction with an SH compound to form the selenotrisulfide. As a result of the lower sensitivity of the tumor cells to BSO, it was possible to achieve a large differential sensitivity to the cytotoxic effect of selenite.

UI MeSH Term Description Entries
D008717 Methionine Sulfoximine Sulfoximine, Methionine
D002460 Cell Line Established cell cultures that have the potential to propagate indefinitely. Cell Lines,Line, Cell,Lines, Cell
D002999 Clone Cells A group of genetically identical cells all descended from a single common ancestral cell by mitosis in eukaryotes or by binary fission in prokaryotes. Clone cells also include populations of recombinant DNA molecules all carrying the same inserted sequence. (From King & Stansfield, Dictionary of Genetics, 4th ed) Clones,Cell, Clone,Cells, Clone,Clone,Clone Cell
D003114 Colony-Forming Units Assay A cytologic technique for measuring the functional capacity of stem cells by assaying their activity. Clonogenic Cell Assay,Stem Cell Assay,Clonogenic Cell Assays,Colony Forming Units Assays,Colony-Forming Units Assays,Stem Cell Assays,Assay, Clonogenic Cell,Assay, Colony-Forming Units,Assay, Stem Cell,Assays, Clonogenic Cell,Assays, Colony-Forming Units,Assays, Stem Cell,Colony Forming Units Assay
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000964 Antimetabolites, Antineoplastic Antimetabolites that are useful in cancer chemotherapy. Antineoplastic Antimetabolites
D012643 Selenium An element with the atomic symbol Se, atomic number 34, and atomic weight 78.97. It is an essential micronutrient for mammals and other animals but is toxic in large amounts. Selenium protects intracellular structures against oxidative damage. It is an essential component of GLUTATHIONE PEROXIDASE. Selenium-80,Selenium 80
D014407 Tumor Cells, Cultured Cells grown in vitro from neoplastic tissue. If they can be established as a TUMOR CELL LINE, they can be propagated in cell culture indefinitely. Cultured Tumor Cells,Neoplastic Cells, Cultured,Cultured Neoplastic Cells,Cell, Cultured Neoplastic,Cell, Cultured Tumor,Cells, Cultured Neoplastic,Cells, Cultured Tumor,Cultured Neoplastic Cell,Cultured Tumor Cell,Neoplastic Cell, Cultured,Tumor Cell, Cultured
D018038 Sodium Selenite The disodium salt of selenious acid. It is used therapeutically to supply the trace element selenium and is prepared by the reaction of SELENIUM DIOXIDE with SODIUM HYDROXIDE. Disodium Selenite,Monosodium Selenite,Selenous Acid Disodium Salt,Selenous Acid, Disodium Salt,Sodium Biselenite,Sodium Selenite Pentahydrate,Biselenite, Sodium,Pentahydrate, Sodium Selenite,Selenite Pentahydrate, Sodium,Selenite, Disodium,Selenite, Monosodium,Selenite, Sodium
D019328 Buthionine Sulfoximine A synthetic amino acid that depletes glutathione by irreversibly inhibiting gamma-glutamylcysteine synthetase. Inhibition of this enzyme is a critical step in glutathione biosynthesis. It has been shown to inhibit the proliferative response in human T-lymphocytes and inhibit macrophage activation. (J Biol Chem 1995;270(33):1945-7) Sulfoximine, Buthionine

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