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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: Jun 25, 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

Vascularization Approaches in Tissue Engineering: Recent Developments on Evaluation Tests and Modulation.

Soraia V Lopes^1,2, Maurice N Collins³, Rui L Reis^1,2

¹3B's Research Group, Research Institute on Biomaterials, Biodegradables and Biomimetics, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, University of Minho, Guimarães 4805-017, Portugal.

ACS Applied Bio Materials

|January 11, 2022

Summary

This summary is machine-generated.

This review explores vascularization strategies for engineered tissues, focusing on scaffold-based vascular network formation and patient vasculature integration. It discusses angiogenesis techniques and future bioprinting concepts for tissue engineering applications.

Keywords:

angiogenesis in vitro/in vivo assays tissue engineering tissue scaffolds vascularization

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Last Updated: Jun 25, 2026

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Area of Science:

Biomaterials Science
Regenerative Medicine
Tissue Engineering

Background:

Engineered tissues of clinically relevant sizes require vascular networks for nutrient and oxygen supply.
Vascularization is a critical challenge in developing functional, large-scale tissue constructs.
Current limitations hinder the integration of engineered tissues with host vasculature.

Purpose of the Study:

To review current strategies for vascularization in tissue engineering.
To analyze methods for evaluating and modulating vascular network formation.
To discuss the role of biomaterials and angiogenesis in successful vascularization.

Main Methods:

Analysis of vascular network formation within various biomaterial scaffolds.
Review of angiogenesis development monitoring techniques.
Examination of strategies for connecting engineered vascular networks to host vasculature.

Main Results:

Scaffold properties and biomaterial choice significantly impact vascular network development.
Angiogenesis techniques show promise for promoting vascular integration.
Tailoring vascularization is key for large tissue engineered constructs.

Conclusions:

Successful vascularization is essential for the clinical translation of engineered tissues.
Advanced angiogenesis monitoring and modulation are crucial.
Emerging bioprinting technologies offer future solutions for complex vascularization challenges.