Intracellular Tissue Factor
Intracellular Tissue Factor - Related Videos
10:08
Flow Cytometry Analysis of Tissue Factor Expression in Human Platelets
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Cited by 2 •
2024
This article outlines the protocol for quantifying the percentage of Tissue Factor (TF)-positive platelets using whole blood flow cytometry, assessing the protein: (1) intracellularly in resting conditions, and (2) on the cell surface, in both resting and activated conditions. Guidance is also provided for evaluating TF-positive platelets in platelet-rich plasma.
08:51
Applying an Inducible Expression System to Study Interference of Bacterial Virulence Factors with Intracellular Signaling
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Cited by 11 •
2015
The method described here is used to induce the apoptotic signaling cascade at defined steps in order to dissect the activity of an anti-apoptotic bacterial effector protein. This method can also be used for inducible expression of pro-apoptotic or toxic proteins, or for dissecting interference with other signaling pathways.
01:30
Factors Affecting Drug Distribution: Tissue Permeability
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2025
The drug distribution process within the human body is a complex interplay of various physicochemical properties inherent to the drugs. These properties, including molecular size, ionization degree, partition coefficient, and stereochemical nature, significantly impact how drugs permeate biological membranes to reach their target tissues. Small molecules with a molecular weight below 500 to 600 Daltons can easily pass through the capillary membrane, gaining access to different tissues. Larger...
07:18
Intracellular Refolding Assay
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Cited by 9 •
2012
In this protocol a method to measure intracellular protein refolding after heat shock is described. This method can be used to study foldases like molecular chaperones and their co-factors or compounds able to influence their activity. Firefly luciferase activity is used as reporter to measure chaperone refolding activity.
03:53
Extracellular Vesicle Tissue Factor Activity Assay
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2023
Here we describe an in-house extracellular vesicle tissue factor activity assay. Activity-based assays and antigen-based assays have been used to measure tissue factor in extracellular vesicles from human plasma samples. Activity-based assays have higher sensitivity and specificity than antigen-based assays.
FAQs
Retention keeps tissue factor functionally separated from circulating factor VII in resting cells. This separation limits access to a key coagulation partner until cellular activation, injury, or trafficking changes its location. The compartment therefore acts as a regulatory checkpoint, helping determine when a cell can contribute to coagulation rather than allowing tissue factor activity to remain continuously available.
Activation or injury can promote trafficking of tissue factor from intracellular compartments to the plasma membrane. Once exposed at the surface, it can bind factor VIIa and initiate the coagulation cascade. Studying this relocation is important because the change in tissue factor position links a cellular event, such as damage or activation, to increased thrombin-generating potential.
Its significance extends to cell signaling as well as coagulation. Intracellular tissue factor is studied in relation to inflammation, angiogenesis, and tissue repair, processes that depend on how cells respond to their environment. These connections suggest that changes in tissue factor localization may influence both clotting-related events and broader cellular responses during injury.
The key distinction is access to circulating factor VII. Intracellular tissue factor remains separated from that partner, whereas surface exposure permits factor VIIa binding and coagulation initiation. This difference means that tissue factor location, not only its presence within a cell, helps determine whether the cell is positioned to trigger coagulation at a particular time.
A useful investigation should follow changes in tissue factor localization and relate them to cellular activation or injury. It can then examine whether surface availability coincides with factor VIIa binding and coagulation initiation. Connecting location with functional consequences helps distinguish stored tissue factor from tissue factor that has become capable of influencing thrombin generation.
Endothelial cells, monocytes, and other tissues provide important settings for examining this compartment. In these contexts, researchers can consider how tissue factor trafficking relates to coagulation, inflammation, angiogenesis, and tissue repair. The findings may clarify how different cell types regulate responses to injury and may support improved understanding of thrombotic disease and targeted therapies.