Related Experiment Video
Updated: Jul 10, 2025
09:42
A Fibrin-Enriched and tPA-Sensitive Photothrombotic Stroke Model
Published on: June 4, 2021
2.7K
Sex Differences in Thrombin Generation in Patients with Acute Ischemic Stroke
Sarina Falcione1, Elena Spronk2, Danielle Munsterman2
1Department of Medicine, Division of Neurology, University of Alberta, 11315 87th Ave NW, Edmonton, T6G 2H5, Canada. sfalcion@ualberta.ca.
Translational Stroke Research
|November 21, 2023
Summary
Sex differences in stroke risk and outcomes may stem from how thrombin generation is regulated. While overall capacity is similar, females show increased platelet activation, and males exhibit decreased thrombus degradation, suggesting distinct thrombosis pathways.
Area of Science:
- Cardiovascular Research
- Hematology
- Neuroscience
Background:
- Sex disparities in stroke incidence, severity, and outcomes are well-documented.
- Thrombin generation, a key factor in blood clot formation, is a potential mediator of these sex differences.
Purpose of the Study:
- To investigate sex-specific differences in thrombin generation among patients with acute ischemic stroke.
- To explore the relationship between thrombin generation and blood cell gene expression in relation to sex.
Main Methods:
- Thrombin generation was quantified using a thrombin generation assay in 97 acute ischemic stroke patients.
- Blood cell gene expression was analyzed via microarray.
- Functional pathway analysis was performed on genes associated with sex differences in thrombin generation.
Main Results:
- Overall thrombin generation capacity, including peak thrombin, lag time, and endogenous thrombin potential, was comparable between females and males.
- Females with high peak thrombin showed increased expression of genes promoting thrombosis and platelet activation.
- Males with high peak thrombin exhibited decreased expression of genes involved in thrombus degradation.
Conclusions:
- Despite similar overall thrombin generation, distinct molecular mechanisms underlie thrombin generation in females and males with acute ischemic stroke.
- Females demonstrate heightened thrombin signaling and platelet activation, whereas males show reduced thrombus degradation.
- These sex-specific regulatory differences in thrombosis may contribute to observed variations in stroke risk and outcomes.
Related Concept Videos
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
713
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...
713
01:20Extrinsic and Intrinsic Pathways of Hemostasis
8.0K
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...
8.0K
01:24Disorders of Hemostasis
945
Hemostasis, the process that stops bleeding after a blood vessel injury, is crucial for maintaining the integrity of the circulatory system. However, disorders of hemostasis can disrupt this delicate balance, leading to either excessive clotting or bleeding. These disorders can be broadly classified into thromboembolic disorders and bleeding disorders.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
Thromboembolic Disorders
Two factors primarily cause thromboembolic conditions.
945
01:16Clot Retraction and Fibrinolysis
6.2K
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.
6.2K