Tissue factor – coagulation factor VIIa complex (TF-FVIIa) (TF-FVIIa)

The Tissue factor – coagulation factor VIIa complex (TF-FVIIa), also known as the extrinsic tenase complex, is the primary physiological initiator of the blood coagulation cascade (StatPearls, 2023). It forms when vascular injury exposes subendothelial Tissue Factor (TF), a transmembrane glycoprotein, to circulating coagulation Factor VII or its activated form, VIIa (UniProt P13726). This high-affinity complex functions as a serine protease that proteolytically activates Factor X and Factor IX, leading to the generation of thrombin and the subsequent formation of a fibrin clot (PubMed, PMID: 11511154). Beyond its fundamental role in hemostasis, the TF-FVIIa complex initiates intracellular signaling by cleaving Protease-Activated Receptor 2 (PAR2), which promotes processes such as inflammation, angiogenesis, and cell proliferation (PubMed, PMID: 22451444). In pathological states, overactivity of this complex contributes to arterial and venous thrombosis, as well as the progression and metastasis of various cancers (NIH, 2022). Consequently, the TF-FVIIa complex is a critical therapeutic target for anticoagulants designed to treat thrombotic disorders and for targeted therapies in oncology (PubChem, CID: 11966249).

Other names

Extrinsic tenase complexTF-FVIIa complexThromboplastin-FVIIa complexCD142-F7 complexTissue factor-activated factor VII complex

Inhibition of the extrinsic tenase complex activity to prevent the proteolytic activation of Factor X and Factor IX, thereby suppressing thrombin generation and clot formation; additionally, blocking TF-FVIIa-mediated cleavage of Protease-Activated Receptor 2 (PAR2) to inhibit downstream pro-inflammatory and pro-angiogenic signaling pathways.