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Clinical importance of thrombomodulin serum levels
F Califano1, T Giovanniello, P Pantone
1Department of Clinical Sciences, Policlinico Umberto I, Università La Sapienza, Rome, Italy.
Thrombomodulin is a glycoprotein that can bind to thrombin and activate protein C, thus mitigating the effects of cytokines produced by inflammatory and immunological processes. The molecule exerts a protective function on endothelial cells. Thrombomodulin is cleaved to its soluble form by neutrophil elastase and by other substances produced during acute and chronic inflammatory responses, immunologic reactions and complement activation. ELISA technique yields normal serum levels of 3.1 +/- 1.3 ng/ml; in males these levels are higher; TM levels also rise during menopause. Other circumstances associated with an increase of serum TM levels are smoking, disseminated intravascular coagulation (DIC), cardiac surgery, atherosclerosis, ARDS, liver cirrhosis, diabetes mellitus, cerebral and myocardial infarction, and multiple sclerosis. Serum levels of TM represent an useful prognostic index, because they are associated with an increase in mortality rate, or however a progression of the underlying pathological condition.
Thrombomodulin is a glycoprotein that can bind to thrombin and activate protein C, thus mitigating the effects of cytokines produced by inflammatory and immunological processes. The molecule exerts a protective function on endothelial cells. Thrombomodulin is cleaved to its soluble form by neutrophil elastase and by other substances produced during acute and chronic inflammatory responses, immunologic reactions and complement activation. ELISA technique yields normal serum levels of 3.1 +/- 1.3 ng/ml; in males these levels are higher; TM levels also rise during menopause. Other circumstances associated with an increase of serum TM levels are smoking, disseminated intravascular coagulation (DIC), cardiac surgery, atherosclerosis, ARDS, liver cirrhosis, diabetes mellitus, cerebral and myocardial infarction, and multiple sclerosis. Serum levels of TM represent an useful prognostic index, because they are associated with an increase in mortality rate, or however a progression of the underlying pathological condition.
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