Spheroids as vascularization units: From angiogenesis research to tissue engineering applications

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Vascular Biology

Background:

• Multi-cellular spheroids replicate the complex 3D environment of natural tissues.
• They are crucial in angiogenesis research and regenerative medicine as vascularization units.

Purpose of the Study:

• To highlight the utility of spheroid sprouting assays as in vitro models for analyzing blood vessel development.
• To emphasize the role of spheroids in tissue engineering for creating prevascularized tissues and vascular structures.

Main Methods:

• Spheroid sprouting assays for analyzing molecular and cellular determinants of blood vessel development.
• In vivo applications of spheroids in tissue engineering for angiogenesis stimulation and tissue construction.

Main Results:

• Spheroid sprouting assays enable the study of endothelial cell phenotypes, angiogenic factors, and cell-matrix/cell-cell interactions.
• Spheroids act as paracrine stimulators of angiogenesis and building blocks for engineered vascularized tissues.

Conclusions:

• Advancements in automated, high-throughput spheroid production facilitate their broader application.
• Spheroids are poised for widespread use in future drug discovery and the bioengineering of functional organ substitutes.