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Mechanism of Angiogenesis

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...

Regulation of Angiogenesis and Blood Supply

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 21, 2026

A Full Skin Defect Model to Evaluate Vascularization of Biomaterials In Vivo

A Full Skin Defect Model to Evaluate Vascularization of Biomaterials In Vivo

Published on: August 28, 2014

Microvascular repair: post-angiogenesis vascular dynamics.

Amanda J LeBlanc¹, Laxminarayanan Krishnan, Christopher J Sullivan

¹Cardiovascular Innovation Institute, Jewish Hospital and St. Mary's Healthcare and University of Louisville, Louisville, Kentucky 40202, USA.

Microcirculation (New York, N.Y. : 1994)

|June 28, 2012

Summary

This summary is machine-generated.

Effective microcirculation repair requires understanding neovascularization beyond angiogenesis. This process involves vessel maturation and network stabilization for functional tissue perfusion, not just new vessel growth.

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Area of Science:

Biomedical Engineering
Vascular Biology
Regenerative Medicine

Background:

Vascular compromise and perfusion deficits are critical in diseases and treatment failures.
Therapeutic strategies focus on vascular repair and regeneration to improve microcirculation.
Increased vessel number does not always equate to improved tissue perfusion.

Purpose of the Study:

To highlight the importance of neovascularization beyond angiogenesis for effective microcirculation regeneration.
To emphasize the need for understanding post-angiogenesis mechanisms in neovascularization.
To underscore the necessity of these mechanisms for developing therapeutic strategies.

Main Methods:

Review of current literature on neovascularization and microcirculation.
Analysis of the integrated vascular activities involved in neovascularization.
Identification of knowledge gaps in post-angiogenesis mechanisms.

Main Results:

Neovascularization involves angiogenesis, vascular guidance, inosculation, maturation, pruning, AV specification, network patterning, structural adaptation, intussusception, and microvascular stabilization.
New vessel segments require remodeling and adaptation for a functional microcirculation.
Dysfunctional microcirculation arises from new vessel segments without proper remodeling.

Conclusions:

Effective microcirculation regeneration depends on the complete neovascularization process, including maturation and stabilization.
A deeper understanding of post-angiogenesis mechanisms is crucial for therapeutic development.
Targeting these mechanisms can lead to effective treatments for compromised microcirculations.