International Immunology, Vol 9, 105-115, Copyright © 1997 by Oxford University Press
JD Hennebold, HH Mu, ME Poynter, XP Chen and RA Daynes
The results from the present study demonstrate that the innate defense
mechanisms which control the progressive growth of Listeria monocytogenes
in normal animals in vivo are dependent upon the active catabolism of
endogenous glucocorticoids by the enzyme 11 beta- hydroxysteroid
dehydrogenase (11 beta-HSD). When 11 beta-HSD activity was
pharmacologically inhibited in vivo, host susceptibility to progressive
bacterial disease was markedly increased. Depressed natural resistance
following 11 beta-HSD inhibition correlated with changes in the patterns of
inducible cytokines by macrophages and T cells. Similar changes were
observed when normal adult animals were treated with low doses of
dexamethasone prior to experimental infection with Listeria.
ARTICLES
Active catabolism of glucocorticoids by 11 beta-hydroxysteroid dehydrogenase in vivo is a necessary requirement for natural resistance to infection with Listeria monocytogenes
Department of Pathology, University of Utah School of Medicine, Salt Lake City 84132, USA.
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