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Related Concept Videos

Fibronectins Connect Cells with ECM01:25

Fibronectins Connect Cells with ECM

Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
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Overview of Cell-Matrix Interactions01:24

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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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ECM Protein Nanofibers and Nanostructures Engineered Using Surface-initiated Assembly
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Vitronectin alters fibronectin organization at the cell-material interface.

Cristina González-García1, Marco Cantini2, David Moratal1

  • 1Center for Biomaterials and Tissue Engineering, Universitat Politècnica de València, Spain.

Colloids and Surfaces. B, Biointerfaces
|August 1, 2013
PubMed
Summary

Vitronectin (VN) enhances fibronectin (FN) fibril formation on poly(ethyl acrylate) surfaces. This study reveals VN

Keywords:
Cell–material interfaceFibronectinFibronectin fibrillogenesisFibronectin reorganizationVitronectin

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Area of Science:

  • Biomaterials Science
  • Cell Biology
  • Extracellular Matrix Biology

Background:

  • Fibronectin (FN) fibrillogenesis is crucial for cellular processes and requires serum proteins.
  • The specific roles of individual serum proteins in FN fibril assembly remain largely uncharacterized.

Purpose of the Study:

  • To investigate the effect of vitronectin (VN) on material-driven FN fibrillogenesis.
  • To examine VN's influence on cell-mediated FN reorganization on poly(ethyl acrylate) (PEA) surfaces.

Main Methods:

  • Adsorption of FN with and without VN onto PEA substrates.
  • Quantification of FN surface density using Western blot.
  • Analysis of FN distribution and cell adhesion via Atomic Force Microscopy (AFM).

Main Results:

  • Competitive adsorption of VN altered FN surface density and distribution on PEA.
  • VN presence on PEA surfaces significantly enhanced cell-mediated FN reorganization and secretion.
  • VN's effect on FN organization surpassed that observed with general serum proteins.

Conclusions:

  • Vitronectin plays a key role in modulating fibronectin fibrillogenesis and reorganization.
  • Material properties, in conjunction with specific proteins like VN, can direct ECM assembly.
  • Findings provide insights into controlling extracellular matrix formation for biomaterial applications.