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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Lysosomal enzyme secretion from human neutrophils mediated by cyclic CMP: inhibition of cyclic GMP accumulation and neutrophil function by glucocorticosteroids.

The effects of several glucocorticosteroids on cyclic GMP accumulation, guanylate cyclase activity, calcium influx, lysosomal enzyme secretion, and phagocytosis were studied in human neutrophils. Contact between neutrophils and serum-treated zymosan particles, in the presence of calcium at pH 7.4, triggered these cellular events within five minutes. Each of these neutrophil functions was markedly inhibited by methylprednisolone sodium succinate, triamcinolone acetonide hemisuccinate and paramethasone acetate but was unaffected by two mineralo-corticosteroids. Human neutrophil soluble guanylate cyclase activity was not changed by the glucocorticoids. Inhibition of phagocytosis by, and lysosomal enzyme secretion from, neutrophils by glucocorticosteroids may be the result of a reduction in cyclic GMP accumulation within these cells. The data suggest that glucocorticosteroids inhibit cyclic GMP accumulation in neutrophils by reducing the influx of extracellular calcium into the cells, thereby limiting the availability of intracellular calcium for metabolic processes associated with the accumulation of cyclic GMP.[1]

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