Role of coagulation factors in cerebral venous sinus and cerebral microvascular thrombosis.

Neurosurgery
Mutsumi NagaiD Neil Granger

Abstract

The objective of this study was to define the relative contributions of three major pro- and anti-coagulation pathways (heparin-antithrombin, protein C, and tissue factor (TF)) in the thrombogenic responses that occur in large and small vessels of the brain. Cerebral venous sinus thrombosis was induced by topical application of FeCl3 on the superior sagittal sinus, while photoactivation of fluorescein was used to induce thrombus formation in cerebral microvessels. Heparin, activated protein C (APC), and antibodies to either APC or TF were used to assess thrombogenesis in wild-type mice. Mutant mice that overexpress the endothelial protein C receptor (EPCR-tg) or with TF deficiency in Tie2-expressing endothelial cells (LTFE) were also used. Thrombus formation in the superior sagittal sinus of wild-type mice was attenuated by heparin and in EPCR-tg mice, while treatment with the APC antibodies enhanced thrombogenesis. Arteriolar thrombosis was largely unresponsive to the interventions studied. However, in cerebral venules, thrombosis was inhibited by heparin and in EPCR-tg mice. TF antibody treatment also inhibited venular thrombosis, with a similar attenuation noted in LTFE mice. Thrombin promotes while the APC pathway blunts th...Continue Reading

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Aug 9, 2011·Seminars in Immunopathology·Charles T Esmon
Oct 12, 2010·Journal of Neuroscience Methods·Yali Jia, Ruikang K Wang
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Mar 7, 2021·Translational Stroke Research·Marie-Charlotte BourrienneMikaël Mazighi

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