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Regulation of Angiogenesis and Blood Supply01:24

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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A Full Skin Defect Model to Evaluate Vascularization of Biomaterials In Vivo
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Hydrogel biomaterials to support and guide vascularization.

Rachel Chapla1, Jennifer L West1

  • 1Department of Biomedical Engineering, Duke University, Durham, NC, United States of America.

Progress in Biomedical Engineering (Bristol, England)
|December 10, 2025
PubMed
Summary

Bioactive biomaterials, particularly hydrogels, are engineered to guide vascularization for tissue repair and disease treatment. Understanding cell-matrix interactions is key to designing effective materials for promoting blood vessel formation.

Keywords:
PEGDAangiogenesiscollagen gelfibrin gellithographymicrofluidicsvasculogenesis

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Tissue Engineering

Background:

  • Vascularization is crucial for engineered organs and treating ischemic diseases.
  • Understanding cellular and molecular events in angiogenesis and vasculogenesis is essential for biomaterial design.
  • Biomaterial platforms can mimic in vivo cell-matrix and signaling interactions to promote vascularization.

Purpose of the Study:

  • To review current hydrogel materials used for vascularization.
  • To discuss innovative design modifications in hydrogels that guide and support vascularization.
  • To highlight the importance of hydrogel properties in promoting vascular cell assembly and tubulogenesis.

Main Methods:

  • Review of naturally-derived and synthetic hydrogel bases.
  • Analysis of hydrogel modifications for mechanical properties, biodegradation, cell adhesion, and biochemical signaling.
  • Examination of architectural properties influencing vascular cell behavior.

Main Results:

  • Hydrogels offer tunable properties (softness, hydration, bio-inertness) suitable for vascularization applications.
  • Tailored hydrogels with specific mechanical, degradation, adhesive, signaling, and architectural features promote vascularization.
  • Design modifications enable precise control over cell-material interactions for guided vascular network formation.

Conclusions:

  • Hydrogels are versatile platforms for designing bioactive biomaterials that support vascularization.
  • Innovative hydrogel designs are critical for guiding angiogenesis and vasculogenesis in regenerative medicine.
  • Further research into biomaterial-cell interactions will advance treatments for vascular-related diseases.