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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...
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Related Experiment Video

Updated: Sep 24, 2025

Visualizing Angiogenesis by Multiphoton Microscopy In Vivo in Genetically Modified 3D-PLGA/nHAp Scaffold for Calvarial Critical Bone Defect Repair
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Effect of Angiogenesis in Bone Tissue Engineering.

Jianhao Huang1, Qixiu Han2, Meng Cai3

  • 1Department of Orthopedics, Jinling Hospital, The First School of Clinical Medicine, Southern Medical University, Nanjing, 210002, People's Republic of China.

Annals of Biomedical Engineering
|May 7, 2022
PubMed
Summary
This summary is machine-generated.

Addressing large bone defects requires enhanced bone regeneration. This study explores angiogenesis, the formation of new blood vessels, as a key strategy to improve bone tissue engineering and overcome current limitations in skeletal reconstruction.

Keywords:
AngiogenesisBone tissue engineeringCell engineeringMaterials properties

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Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Regenerative medicine

Background:

  • Large skeletal defects pose significant challenges in orthopedic reconstruction.
  • Poor vascularization within scaffolds hinders nutrient/oxygen exchange, impeding osteogenic differentiation and bone formation.
  • Angiogenesis is crucial for successful bone regeneration and tissue engineering.

Purpose of the Study:

  • To review and discuss recent advances in promoting angiogenesis for bone tissue engineering.
  • To highlight strategies for improving vascularization in scaffolds for skeletal defect repair.

Main Methods:

  • Review of current literature on angiogenesis in bone tissue engineering.
  • Discussion of various approaches including scaffold design, angiogenic factor delivery, and prevascularization techniques (in vivo and in vitro).

Main Results:

  • Scaffold design modifications can enhance vascularization.
  • Angiogenic factor delivery is a common and effective method for promoting blood vessel growth.
  • Both in vivo and in vitro prevascularization strategies show promise for improving bone regeneration.

Conclusions:

  • Angiogenesis is vital for overcoming limitations in reconstructing large skeletal defects.
  • Angiogenic factor delivery represents a key strategy in current bone tissue engineering.
  • Future research should focus on optimizing angiogenic factor delivery and other vascularization methods for enhanced orthopedic outcomes.