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Related Concept Videos

Anticoagulant Drugs: Low-Molecular-Weight Heparins01:30

Anticoagulant 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...
Clot Retraction and Fibrinolysis01:16

Clot 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.
Intracellular Signaling Affects Focal Adhesions01:17

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

Extrinsic 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...
Formation of the Platelet Plug01:22

Formation of the Platelet Plug

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.
As the injured blood vessel contracts, endothelial cells undergo contraction, revealing collagen fibers in the basement membrane and underlying connective tissue. Furthermore, the plasma membrane of endothelial cells becomes adhesive, preparing the site for platelet adhesion. Platelets...
Vascular Spasm01:16

Vascular Spasm

The vascular phase, also known as vasospasm, is the initial stage of hemostasis, crucial for preventing excessive bleeding when a blood vessel is injured. After a vessel is cut, nerves in the damaged area trigger pain and other sensory impulses. Simultaneously, the smooth muscles in the vessel wall contract, resulting in a vascular spasm. This contraction reduces the vessel's diameter at the injury site, slowing or stopping blood loss through the vessel wall. Vascular spasms typically last for...

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Related Experiment Video

Updated: May 29, 2026

Ferric Chloride-induced Murine Thrombosis Models
10:37

Ferric Chloride-induced Murine Thrombosis Models

Published on: September 5, 2016

The thrombospondins.

Josephine C Adams1, Jack Lawler

  • 1School of Biochemistry, University of Bristol, Bristol BS8 1TD, United Kingdom. jo.adams@bristol.ac.uk

Cold Spring Harbor Perspectives in Biology
|August 31, 2011
PubMed
Summary
This summary is machine-generated.

Thrombospondins are versatile proteins involved in tissue repair and development. These extracellular matrix components play crucial roles in cell signaling, collagen organization, and growth factor regulation, impacting various physiological and pathological processes.

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Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood
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Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood

Published on: September 5, 2017

Related Experiment Videos

Last Updated: May 29, 2026

Ferric Chloride-induced Murine Thrombosis Models
10:37

Ferric Chloride-induced Murine Thrombosis Models

Published on: September 5, 2016

Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood
07:08

Assessment of the Anticoagulant and Anti-inflammatory Properties of Endothelial Cells Using 3D Cell Culture and Non-anticoagulated Whole Blood

Published on: September 5, 2017

Area of Science:

  • Biochemistry
  • Cell Biology
  • Extracellular Matrix Biology

Background:

  • Thrombospondins are calcium-binding glycoproteins with diverse extracellular matrix interactions.
  • They exhibit properties of matrix molecules, cytokines, and chaperones.
  • Thrombospondins modulate collagen organization and bind growth factors and proteases.

Purpose of the Study:

  • To provide a comprehensive overview of thrombospondin structure, evolution, and cell biology.
  • To discuss the in vivo roles of thrombospondins in physiological processes.
  • To explore associations with human diseases and translational applications.

Main Methods:

  • Review of existing literature on thrombospondin structure and function.
  • Analysis of evolutionary features of thrombospondins.
  • Discussion of cell biology and in vivo roles based on published data.

Main Results:

  • Thrombospondins possess complex domain organization and evolutionary conservation.
  • They interact with cell surface receptors, influencing signaling pathways.
  • These proteins are critical for wound healing, angiogenesis, connective tissue organization, and synaptogenesis.

Conclusions:

  • Mammalian thrombospondins are pleiotropic proteins with context-dependent functions.
  • Their roles in physiology and pathology are extensive and still being uncovered.
  • Further research is needed to fully appreciate their significance in health and disease.