DEXAMETHASONE ENHANCES AGONIST INDUCTION OF TISSUE FACTOR IN MONOCYTES BUT NOT IN ENDOTHELIAL-CELLS

被引:27
作者
BOTTLES, KD
MORRISSEY, JH
机构
[1] OKLAHOMA MED RES FDN, CARDIOVASC BIOL RES PROGRAM, 825 NE 13TH ST, OKLAHOMA CITY, OK 73104 USA
[2] UNIV OKLAHOMA HLTH SCI CTR, DEPT MED, OKLAHOMA CITY, OK 73109 USA
[3] UNIV OKLAHOMA HLTH SCI CTR, DEPT PATHOL, OKLAHOMA CITY, OK 73109 USA
关键词
GLUCOCORTICOIDS; THROMBOSIS; ENDOTOXIN; TNF-ALPHA; COAGULATION; TISSUE FACTOR;
D O I
10.1097/00001721-199306000-00002
中图分类号
R5 [内科学];
学科分类号
1002 ; 100201 ;
摘要
Stimulation of monocytic cells by inflammatory agents such as bacterial lipopolysaccharide or tumour necrosis factor-alpha leads to the rapid and transient expression of tissue factor, the major cellular initiator of the extrinsic-coagulation cascade in both haemostasis and tissue inflammation. In this study we investigated whether the synthetic anti-inflammatory glucocorticoid, dexamethasone, would inhibit agonist induction of tissue factor expression in both monocytes and endothelial cells. Surprisingly, dexamethasone significantly enhanced the induction of tissue factor expression by peripheral blood mononuclear cells and an established monocytic cell line, THP-1, in response to lipopolysaccharide or tumour necrosis factor-alpha. However, unlike monocytic cells, dexamethasone did not enhance agonist induction of tissue factor in endothelial cells. Synergistic enhancement of tissue factor expression by dexamethasone was also reflected in tissue factor mRNA levels in THP-1 cells, but was not the result of improved TF mRNA stability. Synergism between bacterial lipopolysaccharide and glucocorticoid in the induction of monocyte effector function is extremely unusual and may help to explain the variable outcome of glucocorticoid treatment of septic shock.
引用
收藏
页码:405 / 414
页数:10
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