Tissue factor and the endometrium: from physiology to pathology.
Graciela Krikun1, Charles J Lockwood, Michael J Paidas
1Department of Ob/Gyn, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510, USA. graciela.krikun@yale.edu
Thrombosis Research
|July 22, 2009
Summary
Tissue factor (TF) initiates hemostasis and is crucial for implantation in the human endometrium. Its altered expression is linked to various endometrial pathologies, including infertility and endometriosis.
Area of Science:
- Reproductive biology
- Hemostasis
- Endometrial physiology
Background:
- Tissue factor (TF) is a transmembrane protein initiating hemostasis.
- TF also plays roles in angiogenesis and disease progression.
- Its function in the human endometrium, particularly during pregnancy, is under investigation.
Purpose of the Study:
- To investigate the expression and function of TF in the human endometrium.
- To understand TF's role in implantation and potential links to endometrial pathologies.
Main Methods:
- Analysis of TF expression in pregnant and non-pregnant human endometrium.
- Study of TF's role in implantation and trophoblast invasion.
- Investigation of altered TF expression in conditions like endometriosis and after contraception.
Main Results:
- TF is upregulated during implantation, protecting against bleeding during trophoblast invasion.
- Altered TF expression was observed after long-term contraception and in endometriosis.
- Dysregulation of TF is implicated in various endometrial pathologies.
Conclusions:
- TF is a critical factor in endometrial physiology, especially during implantation.
- Altered TF expression is associated with significant endometrial pathologies.
- Further research into TF's role can inform treatments for infertility, bleeding disorders, and endometriosis.
Related Concept Videos
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
2.6K
Hemostasis is a crucial process that prevents excessive blood loss from damaged blood vessels. It involves various mechanisms such as vasoconstriction, platelet adhesion and activation, and fibrin formation. The importance of each mechanism depends on the type of vessel injury. In contrast, thrombosis is the abnormal formation of a blood clot within the blood vessels, leading to potential complications if the clot obstructs blood flow. Thrombosis can be caused by increased coagulability of the...
2.6K
01:20Extrinsic and Intrinsic Pathways of Hemostasis
10.9K
Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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...
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...
10.9K
01:16Clot Retraction and Fibrinolysis
6.0K
After a fibrin clot is formed, the next step is clot retraction, a vital process facilitated by platelet contractile proteins, such as actin and myosin. These proteins pull the fibrin strands closer together and condense the clot. This action reduces the size of the clot, creating a smaller, denser structure that effectively seals off the damaged vessel. Clot retraction consolidates the clot and helps with wound healing by bringing the edges of the damaged blood vessel closer together.
6.0K
01:19Histology of the Uterus
5.0K
The uterine wall consists of three histological layers: the perimetrium, myometrium, and endometrium. The outermost perimetrium is a thin, serous membrane connected with the broad ligament on the sides, which helps anchor the uterus in the pelvic cavity. The thickest layer, myometrium, is mainly made up of smooth muscle tissue bundles. Its contractions are vital in facilitating the expulsion of the uterine lining, fetus, and placenta during menstruation and childbirth.
The endometrium is the...
The endometrium is the...
5.0K
01:26Coronary Artery Disease II: Pathophysiology
1.1K
Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...
1.1K