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Review Article
Mechanisms of Disease
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Volume 340:1555-1564 May 20, 1999 Number 20
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Vascular-Bed–Specific Hemostasis and Hypercoagulable States
Robert D. Rosenberg, M.D., Ph.D., and William C. Aird, M.D.

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Hemostasis is a physiologic mechanism that maintains blood in a fluid state within the circulation. The coagulation of blood is mediated by cellular components and soluble plasma proteins. In response to vascular injury, circulating platelets adhere, aggregate, and provide cell-surface phospholipid for the assembly of blood-clotting enzyme complexes. The extrinsic pathway of blood coagulation is initiated when blood is exposed to non-vascular-cell–bound tissue factor in the subendothelial space (Figure 1). Tissue factor binds to activated factor VII, and the resulting enzyme complex activates factors IX and X of the intrinsic and common coagulation pathways, respectively. Factor IX activated . . . [Full Text of this Article]

The Systemic-Defect–Local-Phenotype Paradox

Hypercoagulability in Humans

Animal Models of Hypercoagulability

Vascular-Bed–Specific Signaling Pathways

Extracellular Signals

Cell-Subtype–Specific Signaling Pathways

Transcriptional Regulation

Coronary-Artery Thrombosis

Conclusions


Source Information

From the Department of Medicine, Divisions of Molecular Medicine and Hematology–Oncology, Beth Israel Deaconess Medical Center, Boston (R.D.R., W.C.A.); and the Department of Biology, Massachusetts Institute of Technology, Cambridge (R.D.R.).

Address reprint requests to Dr. Aird at the Division of Molecular Medicine, RW-663, Beth Israel Deaconess Medical Center, Boston, MA 02215, or at waird@caregroup.harvard.edu.

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