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Review : Thrombomodulin: an overview and potential implications in vascular disordersINSERM U 353, Institut d'Hématologie, Hôpital Saint-Louis, and Service d'Immunologie Clinique, Hôpital Broussais, Paris, France
INSERM U 353, Institut d'Hématologie, Hôpital Saint-Louis, and Service d'Immunologie Clinique, Hôpital Broussais, Paris, France Thrombomodulin (TM), a high affinity thrombin receptor present on endothelial cell membrane, plays an important role as a natural anticoagulant. It acts as a cofactor of thrombin-catalyzed activation of protein C, and inhibits the procoagulant functions of thrombin. TM is also located in other cells (keratinocytes, osteoblasts, macrophages,...) where it might be involved in cell differentiation or in inflammation. In the presence of cytokines, activated neutrophils and macrophages, endothelial TM is cleaved enzymatically, releasing soluble fragments which circulate in the blood and are eliminated in urine. Plasma TM level (pTM) can be measured using a two-site enzyme-linked immunosorbent assay (ELISA). pTM level is regarded as a molecular marker reflecting injury of endothelial cells. It is often increased in case of diffuse endothelial damage as in disseminated intravascular coagulation, diabetic microangiopathy, Plasmodium falciparum and rickettsial infections. pTM is also a predictive marker of hypertensive complications in pregnancy. In several systemic inflammatory diseases, pTM levels are correlated to the activity of the disease.
Key Words: endothelium thrombin receptor endothelial damage
Lupus, Vol. 7, No. 2 suppl,
S120-S125 (1998) This article has been cited by other articles:
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