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Related Experiment Video

Updated: May 11, 2026

Microfluidic Model to Mimic Initial Event of Neovascularization
10:01

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Published on: April 10, 2021

Microscopic matrix remodeling precedes endothelial morphological changes during capillary morphogenesis.

Claire McLeod1, John Higgins, Yekaterina Miroshnikova

  • 1Franklin W. Olin College of Engineering, Needham, MA 02492, USA.

Journal of Biomechanical Engineering
|June 1, 2013
PubMed
Summary
This summary is machine-generated.

Endothelial cells remodel collagen matrices to form microvascular networks (MVNs). This study shows collagen gathering precedes MVN formation, highlighting matrix remodeling

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Area of Science:

  • Biomedical Engineering
  • Cell Biology
  • Tissue Engineering

Background:

  • Microvascular network (MVN) formation is crucial for tissue development and repair.
  • The cellular microenvironment, including biochemical and biophysical factors, significantly influences MVN formation.
  • Cell-matrix interactions and matrix remodeling are increasingly recognized as key drivers of cellular behaviors like MVN formation.

Purpose of the Study:

  • To investigate the role of matrix remodeling in microvascular network (MVN) formation.
  • To explore the relationship between collagen matrix changes and endothelial cell behavior during MVN development.
  • To test the hypothesis that collagen gathering by endothelial cells is an early step in MVN formation.

Main Methods:

  • Utilized an in vitro model of MVN formation by suspending human umbilical vein endothelial cells in collagen hydrogels.
  • Employed microscopic observation to analyze cell and matrix morphology.
  • Applied quantitative metrics to assess MVN formation and collagen gathering in the hydrogels.

Main Results:

  • Macroscopic collagen gel compaction correlated with the extent of MVN formation across varying gel stiffness.
  • Collagen gel compaction was observed to precede cell elongation and subsequent MVN formation.
  • Microscopic analysis revealed early alignment and gathering of collagen fibrils between adjacent endothelial cells.

Conclusions:

  • The findings support the hypothesis that endothelial cells actively gather and align collagen.
  • This collagen remodeling appears to be a critical early event in the process of microvascular network formation.
  • Understanding these matrix-cell interactions provides insights into vascular development and potential therapeutic strategies.