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- W1546475417 abstract "The steady state GSH content of cultured mouse resident peritoneal macrophages was 34 +/- 5 pmol/microgram of cell protein. Intracellular GSH content decreased concomitantly with zymosan ingestion. The half-life of GSH decreased from 1.9 h in resting cells to 0.58 h during phagocytosis as determined by inhibition of GSH synthesis with buthionine sulfoximine. The decrease in GSH half-life was directly related to the extent of particle uptake. In cytochalasin D-treated cells, attachment of zymosan to the macrophage plasma membrane in the absence of particle interiorization was sufficient to stimulate GSH turnover. Efflux was the major route of GSH loss in [35S]cystine-labeled macrophages, and was enhanced 3-fold by a zymosan challenge. GSH was lost intact since resident macrophages lack gamma-glutamyl transpeptidase (less than 1 pmol of L-gamma-glutamyl-p-nitroanilide/microgram of protein . h). Macrophages obtained from mice challenged in vivo with Corynebacterium parvum maintained higher intracellular GSH levels (50 +/- 5 pmol/microgram of cell protein) than did resident cells. The half-life of GSH in buthionine sulfoximine-treated C. parvum-elicited macrophages was 3.8 +/- 0.2 h while resting and 1.3 +/- 0.2 h during phagocytosis. C. parvum-elicited macrophages, in contrast to resident cells, contained sufficient levels of gamma-glutamyl transpeptidase activity to hydrolyze 55 pmol of L-gamma-glutamyl-p-nitroanilide/microgram of cell protein . h. These studies indicate that phagocytosis and cellular activation have profound effects on GSH metabolism in macrophages." @default.
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- W1546475417 date "1982-02-01" @default.
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- W1546475417 title "Glutathione metabolism in resting and phagocytizing peritoneal macrophages." @default.
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- W1546475417 doi "https://doi.org/10.1016/s0021-9258(19)68139-1" @default.
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