Recombinant human interleukin-1 inhibits the induction by dexamethasone of alkaline phosphatase activity in murine capillary endothelial cells
- 1 December 1987
- journal article
- research article
- Published by Wiley in Journal of Cellular Physiology
- Vol. 133 (3), 539-545
- https://doi.org/10.1002/jcp.1041330315
Abstract
A mutual antagonism exists between interleukin-1s (IL-1s) as pro-inflammatory and glucocorticoids as anti-inflammatory mediators. This report examines the effects of IL-1 on the induction by dexamethasone of alkaline phosphatase in LEII murine endothelial cells. Dexamethasone increases the specific activity of alkaline phosphatase in a time- and dose-dependent fashion (maximum 14-fold induction at 10−6 M, IC50 = 10−8 M), and this induction can be completely inhibited by simultaneous incubation with picomolar concentrations of recombinant human IL-1α or IL-1β. This IL-1-mediated antagonism of dexamethasone activity is not due to a down-regulation of glucocorticoid receptors in the cell line used, because the number of receptors and their affinity for dexamethasone is unchanged in IL-1-treated cells. However, induction of alkaline phosphatase by dexamethasone in LEII cells is receptor-mediated, since it can also be inhibited by glucocorticoid-receptor antagonists.This publication has 39 references indexed in Scilit:
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