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Related Concept Videos

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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.
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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...
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Extrinsic and Intrinsic Pathways of Hemostasis01:20

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Blood clotting or coagulation involves extrinsic and intrinsic pathways, which ultimately merge into the common pathway, forming a fibrin clot.
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Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
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The platelet phase, the second stage of hemostasis, commences around 15-20 seconds after an injury. It follows and overlaps with the vascular phase, during which blood vessels constrict to minimize blood loss.
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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.
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Related Experiment Video

Updated: May 21, 2025

Deep Vein Thrombosis Induced by Stasis in Mice Monitored by High Frequency Ultrasonography
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Transforming Growth Factors in Venous Thrombus Formation and Resolution.

Jonathan Davis1, Molly Maranto2, Jonathan Kennedy3

  • 1Cardiovascular Translational Research Center (J.D., C.E.E.), University of South Carolina School of Medicine, Columbia.

Arteriosclerosis, Thrombosis, and Vascular Biology
|March 20, 2025
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Summary

Transforming growth factor-beta 1 (TGF-β1) promotes deep vein thrombosis (DVT) formation and hinders its resolution. Targeting TGF-β1 may offer new therapeutic strategies for DVT.

Keywords:
cytokinespulmonary embolismtransforming growth factorsvenous thromboembolismvenous thrombosis

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Area of Science:

  • Vascular biology and thrombosis research.
  • Inflammatory cytokine signaling pathways.
  • Molecular mechanisms of venous thromboembolism.

Background:

  • Deep vein thrombosis (DVT) is a common vascular occlusive disorder with significant public health impact.
  • Current DVT treatments are limited by bleeding risks and slow thrombus resolution.
  • Inflammatory cytokines, particularly the transforming growth factor-beta (TGF-β) family, play crucial roles in DVT pathogenesis.

Purpose of the Study:

  • To review the roles of TGF-β isoforms in venous thrombus formation and resolution.
  • To explore the potential of TGF-β family members as therapeutic targets for DVT.
  • To identify future research directions in TGF-β-mediated DVT.

Main Methods:

  • Literature review of studies investigating TGF-β isoforms in venous thrombosis.
  • Analysis of experimental data on TGF-β1's role in thrombus formation and resolution.
  • Examination of the impact of TGF-β1 inhibition or knockdown on DVT burden.

Main Results:

  • TGF-β1 is a key regulator, promoting DVT formation and inhibiting its resolution.
  • Increased TGF-β1 expression is observed during venous thrombosis.
  • Inhibition or knockdown of TGF-β1 effectively reduces thrombus burden in experimental models.

Conclusions:

  • TGF-β1 is a promising diagnostic marker and therapeutic target for DVT.
  • Further research is needed to elucidate the roles of TGF-β2 and TGF-β3 in DVT.
  • Targeting TGF-β isoforms could lead to novel DVT treatments with improved efficacy and safety profiles.