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Related Concept Videos

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.
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...
Amyloid Fibrils03:03

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
Amyloid deposits were observed as early as 1639 in the liver and the spleen.   In 1854, Rudolph Virchow performed iodine staining, normally used to...
Amyloid Fibrils03:03

Amyloid Fibrils

Amyloid fibrils are aggregates of misfolded proteins.  Under most circumstances, misfolded proteins are either refolded by chaperone proteins or degraded by the proteasome. However, in the case of a mutation or a disease, these proteins can accumulate to form large clusters and often further assemble to form elongated fibers, called fibrils. 
Amyloid deposits were observed as early as 1639 in the liver and the spleen.   In 1854, Rudolph Virchow performed iodine staining, normally used to...
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...
Protein Folding01:22

Protein Folding

Overview

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Related Experiment Video

Updated: Jun 4, 2026

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States
07:09

Experimental and Imaging Techniques for Examining Fibrin Clot Structures in Normal and Diseased States

Published on: April 1, 2015

Molecular mechanisms affecting fibrin structure and stability.

Susan T Lord1

  • 1Department of Pathology and Laboratory Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-7525, USA. stl@med.unc.edu

Arteriosclerosis, Thrombosis, and Vascular Biology
|February 18, 2011
PubMed
Summary

Understanding fibrin structure and stability is key to treating thrombotic diseases. Research into fibrinogen

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Analysis of β-Amyloid-induced Abnormalities on Fibrin Clot Structure by Spectroscopy and Scanning Electron Microscopy
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Analysis of β-Amyloid-induced Abnormalities on Fibrin Clot Structure by Spectroscopy and Scanning Electron Microscopy

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Area of Science:

  • Biochemistry and Molecular Biology
  • Hematology and Thrombosis Research

Background:

  • Fibrin structure and stability are implicated in thrombotic diseases like venous thromboembolism.
  • The solved crystal structure of fibrinogen enabled molecular mechanism analysis.
  • Biochemical studies investigate fibrinogen to fibrin conversion and network formation.

Purpose of the Study:

  • To elucidate molecular mechanisms governing fibrin structure and stability.
  • To understand how fibrin structure influences clot lysis and mechanical properties.
  • To explore the molecular basis of fibrin monomer mechanical properties.

Main Methods:

  • Analysis of crystal structure of fibrinogen.
  • Biochemical studies of natural and recombinant variant fibrinogens.
  • Investigation of intermolecular interactions in fibrin network formation.

Main Results:

  • Identified intermolecular interactions controlling fibrin structure.
  • Established that fibrin structure modulates enzymatic lysis of the fibrin network.
  • Linked mechanical stability of fibrin clots to fibrin monomer properties.

Conclusions:

  • Molecular mechanisms controlling fibrin structure also control stability and lysis.
  • Understanding fibrin monomer properties is crucial for clot stability.
  • Insights may lead to novel pharmaceuticals for thrombotic disease treatment.