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Coagulation cascade: It is a series of enzymatic reactions that lead to the formation of a stable blood clot. The endothelial cells release substances like tissue factor, which triggers the extrinsic pathway of the coagulation cascade. This is called as "secondary hemostasis". [20]
Although the contact system can activate FXI and the subsequent clotting cascade, and it is routinely observed to activate coagulation in the presence of medical devices, [16] the actual role of the contact system in normal physiological coagulation remains contentious. This is primarily due to the fact that deficiencies in the contact system ...
Coagulation factor X (EC 3.4.21.6), or Stuart factor, is an enzyme of the coagulation cascade, encoded in humans by F10 gene. [5] It is a serine endopeptidase (protease group S1, PA clan ). Factor X is synthesized in the liver and requires vitamin K for its synthesis.
The coagulation cascade. Factor XII (FXII, Hageman factor) is a plasma glycoprotein of approximately 90 kDa and is part of the coagulation cascade. It activates factor XI and prekallikrein in vitro. FXII is activated to FXIIa by negatively charged surfaces such as glass, initiating the intrinsic pathway. [12]
For example, the tissue factor pathway in the coagulation cascade of secondary hemostasis is the primary pathway leading to fibrin formation, and thus, the initiation of blood coagulation.
2152 14066 Ensembl ENSG00000117525 ENSMUSG00000028128 UniProt P13726 P20352 RefSeq (mRNA) NM_001993 NM_001178096 NM_010171 RefSeq (protein) NP_001171567 NP_001984 NP_034301 Location (UCSC) Chr 1: 94.53 – 94.54 Mb Chr 3: 121.52 – 121.53 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Tissue factor, also called platelet tissue factor or Coagulation factor III, is a protein present ...
High-molecular-weight kininogen (HMWK or HK) is a circulating plasma protein which participates in the initiation of blood coagulation, and in the generation of the vasodilator bradykinin via the kallikrein-kinin system. HMWK is inactive until it either adheres to binding proteins beneath an endothelium disrupted by injury, thereby initiating ...
Therefore, although the coagulation cascade can be triggered in vitro through the intrinsic pathway only, in vivo coagulation is triggered by the extrinsic pathway. However, the model better describing how coagulation works is the so-called cell-based model, a more integrated picture of the whole process, in which phospholipid surfaces, such as ...
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