Related Experiment Video
Updated: Jul 16, 2026

Investigating von Willebrand Factor Pathophysiology Using a Flow Chamber Model of von Willebrand Factor-platelet String Formation
Published on: August 14, 2017
[Von Willebrand factor activity in patients with systemic lupus erythematosus]
Eighty four SLE patients have been studied. The levels of Willebrand factor, total antibodies to cardiolipin class IgG, antibodies to D-DNA, total index of inflammatory process activity SLEDAI and other routine markers have been assessed. Endothelial-dependent vasodilatation of brachial artery and carotid intima-media thickness was found to exceed that of control group twice as much. The elevation of Willebrand factor is associated with increase in SLE activity and correlated with SLEDAI index, C-reactive protein level and total antibody content to IgG class phospholipids. The elevation of Willebrand factor activity is also associated with endothelial-dependent vasodilatation impairment in patients with high inflammatory process activity in particular.
Eighty four SLE patients have been studied. The levels of Willebrand factor, total antibodies to cardiolipin class IgG, antibodies to D-DNA, total index of inflammatory process activity SLEDAI and other routine markers have been assessed. Endothelial-dependent vasodilatation of brachial artery and carotid intima-media thickness was found to exceed that of control group twice as much. The elevation of Willebrand factor is associated with increase in SLE activity and correlated with SLEDAI index, C-reactive protein level and total antibody content to IgG class phospholipids. The elevation of Willebrand factor activity is also associated with endothelial-dependent vasodilatation impairment in patients with high inflammatory process activity in particular.
Related Concept Videos
Anticoagulant Drugs: Low-Molecular-Weight Heparins
Extrinsic and Intrinsic Pathways of Hemostasis
The Extrinsic Pathway
The extrinsic pathway of coagulation is typically initiated by tissue damage that exposes blood to tissue factor (TF), a protein released by the damaged tissue cells outside the blood vessels—this interaction with TF triggers biochemical reactions involving specific clotting factors. The key player here is Factor VII, which forms a...
Clot Retraction and Fibrinolysis
Formation of the Platelet Plug
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Disorders of Hemostasis
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Coagulation
During the coagulation phase, clotting factors, or procoagulants, play a vital role in initiating and progressing the coagulation cascade. This cascade is a series of reactions...

