Video Experimental Relacionado
Updated: May 11, 2026
13:08
Measurement of Factor V Activity in Human Plasma Using a Microplate Coagulation Assay
Published on: September 9, 2012
El papel de los factores de riesgo en la modulación de la actividad de los factores tisulares y la trombogenicidad
Antonia Sambola1, Julio Osende, James Hathcock
1Cardiovascular Biology Research Laboratory, Mount Sinai School of Medicine, New York, NY 10029, USA.
Circulation
|February 26, 2003
Resumen
El aumento de la actividad del factor de tejido circulante (TF) contribuye a las complicaciones trombóticas en la diabetes, el tabaquismo y la hiperlipidemia. La gestión de estos factores de riesgo cardiovascular puede reducir los niveles de TF y los riesgos trombóticos asociados.
Área de la Ciencia:
- Ciencias Cardiovasculares Ciencias Cardiovasculares
- Hematología Hematología.
- Investigación de Enfermedades Metabólicas.
Sus antecedentes:
- Las enfermedades aterotrombóticas están relacionadas con un factor de tejido circulante (TF) elevado.
- Los factores de riesgo cardiovasculares como la diabetes, la hiperlipemia y el tabaquismo se correlacionan con un aumento de las complicaciones trombóticas.
- Este estudio investiga si el aumento de la actividad de TF media una mayor trombogenicidad sanguínea (BT) en personas con diabetes tipo 2, fumadores e hiperlipidémicas.
Objetivo del estudio:
- Para determinar el papel de la actividad del factor de tejido circulante (TF) en la trombogenicidad sanguínea (BT) en pacientes con diabetes mellitus tipo 2.
- Investigar el impacto del tabaquismo y la hiperlipidemia en los niveles circulantes de TF y BT.
- Explorar la relación entre los factores de riesgo cardiovascular y las complicaciones trombóticas a través de la actividad de TF.
Principales métodos:
- TF en circulación cuantificado por inmunocaptura, relipidación y generación de factor Xa (FXa).
- Se evaluó la trombogenicidad sanguínea (BT) utilizando la formación de trombos en una cámara de perfusión Badimon.
- Se estudiaron pacientes con diabetes tipo 2 mal controlados (n=36), fumadores (n=10) y sujetos hiperlipidémicos (n=10).
Principales resultados:
- La mejora del control glucémico en pacientes diabéticos redujo la circulación de TF y BT.
- Fumar dos cigarrillos aumentó agudamente los niveles de TF.
- Los sujetos hiperlipidémicos exhibieron niveles más altos de TF circulante en comparación con los voluntarios sanos.
Conclusiones:
- El aumento de la TF circulante puede ser un mecanismo clave subyacente al aumento de los riesgos trombóticos en pacientes con diabetes, tabaquismo e hiperlipidemia.
- Estos hallazgos resaltan la importancia de evaluar y gestionar el riesgo cardiovascular global.
- Dirigir la actividad de TF podría ser una estrategia terapéutica para reducir las complicaciones trombóticas.
Videos de Conceptos Relacionados
01:17Intracellular Signaling Affects Focal Adhesions
Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
Some...
Some...
01:30Anticoagulant Drugs: Low-Molecular-Weight Heparins
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...
01:09Coagulation
The coagulation phase is a critical part of the body's process to prevent blood loss following injury to blood vessels. It involves chemical reactions that form a clot to seal the injured area. The clotting process begins shortly after injury, within 15-20 seconds for severe damage and 1-2 minutes for minor injuries.
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...
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...
01:20Extrinsic and Intrinsic Pathways of Hemostasis
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 forms a...
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...
01:16Clot Retraction and Fibrinolysis
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.
01:24Disorders of Hemostasis
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.