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[Effect of hydrocortisone on peripheral blood phagocytic cells under beta-adrenoreceptors blockade].

The effect of hydrocortisone (50 mg/kg body wt i.p.) under beta-adrenergic receptors blockade (four subcutaneous injections of propranolol in single dose of 5 mg/kg body wt with 3 h interval) on phagocytic activity and oxygen dependent microbicidal activity in NBT-test of peripheral blood phagocytic cells in male Wistar rats was investigated. It was established that hydrocortisone stimulated neutrophil phagocytic activity through 6, 24 and 48 h after hormone injection and decreased oxygen-dependent microbicidal activity of phagocytic cells in NBT-test. Hydrocortisone in vitro (500 ng/ml) decreased neutrophil phagocytic activity that indicated on realization of stimulating effect of hydrocortisone in vivo through complex of other indirect mechanisms. Administration of hydrocortisone led to depression of eosinophil phagocytosis and lesser decrease in monocyte phagocytic activity. Hydrocortisone effects were significantly modified under blockade of beta-adrenoceptors that indicated on its mediation by endogenous catecholamines through modulation of beta-adrenoceptor expression.