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Glucocorticoid-induced Annexin 1 Secretion by Monocytes and Peritoneal Leukocytes

Overview
Journal Br J Pharmacol
Publisher Wiley
Specialty Pharmacology
Date 1995 Jul 1
PMID 7582501
Citations 17
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Abstract

1. We have studied the ability of the glucocorticoid, dexamethasone, to induce annexin 1 secretion by either human blood monocytes or rat peritoneal leukocytes. 2. The in vivo treatment of rats with dexamethasone (1.25 mg kg-1) selectively induced secretion of annexin 1 by peritoneal leukocytes, as assessed by incubating these cells in culture medium. Annexin 1 secretion was also induced in human cultured monocytes, in vitro, by 10(-6) M dexamethasone. 3. Annexin 1 secretion was inhibited in the presence of 20 mM NH4Cl or by conducting the experiments at 18 degrees C. In contrast, it was not inhibited by monensin, nocodazole or brefeldin A. 4. The time necessary for annexin 1 synthesis and secretion was less than 15 min. 5. These data indicate that glucocorticoids induce annexin 1 secretion by monocytes or peritoneal leukocytes. Because it is not inhibited by monensin, nocodazole or brefeldin A and it is rapid, annexin 1 secretion seems to occur by the secretory pathway similar to that used by several cytosolic proteins such as interleukin-1 beta.

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