CD142 , also known as Tissue Factor (TF) , Coagulation Factor III , and Thromboplastin , is a 45 kD type I transmembrane glycoprotein. It is expressed on the surface of a variety of cells that are physically separated from the circulating blood which include smooth muscle cells , fibroblasts , keratinocytes , glomerular epithelial cells (cytoplasmic inclusions) , astrocytes , myocardium , liver stromal cells , pancreas cells , and is also expressed on activated monocytes and stimulated endothelial cells. CD142 is a high-affinity receptor for coagulation factor VII and initiates the extrinsic pathway of blood coagulation. CD142 also plays an important role in a variety of diseases such as sepsis , atherosclerosis , and cancer.
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