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Regulation of Angiogenesis and Blood Supply

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 hydroxylase and factor...
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Related Experiment Video

Updated: May 9, 2026

High-resolution Time-lapse Imaging and Automated Analysis of Microtubule Dynamics in Living Human Umbilical Vein Endothelial Cells
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Endothelial cell motility, coordination and pattern formation during vasculogenesis.

Andras Czirok1

  • 1Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS, USA; Department of Biological Physics, Eötvös Loránd University, Budapest, Hungary.

Wiley Interdisciplinary Reviews. Systems Biology and Medicine
|July 17, 2013
PubMed
Summary

Endothelial cells autonomously form vascular networks through mechanisms like contact guidance and chemotaxis. These cell behaviors, driven by biochemical signals, enable self-organization without external pre-patterns.

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Area of Science:

  • Developmental biology
  • Cell biology
  • Biomedical engineering

Background:

  • Vascular network assembly is crucial for development and medicine.
  • Understanding tissue-level structures requires knowledge of cell behavior patterns, including motility and adhesion.
  • Biochemical signal transduction processes regulate cell behaviors.

Purpose of the Study:

  • To explain the organizational principles of vascular patterning.
  • To elucidate how tissue-level structures are controlled by cell behaviors.
  • To review proposed mechanisms for vascular network assembly.

Main Methods:

  • Discussion of proposed mechanisms for vascular network assembly.
  • Analysis of cell motility guided by extracellular matrix alignment (contact guidance).
  • Review of chemotaxis guided by paracrine and autocrine morphogens.
  • Examination of multicellular sprouting guided by cell-cell contacts.

Main Results:

  • Emergent patterns arise from individual cell behaviors.
  • Endothelial cells can autonomously form interconnected vascular structures.
  • No external pre-pattern is required for vascular network formation.

Conclusions:

  • Vascular network assembly is an emergent property of endothelial cell behaviors.
  • Mechanisms like contact guidance, chemotaxis, and multicellular sprouting contribute to self-organization.
  • Endothelial cells possess an intrinsic ability to form complex vascular patterns.