Engineering transferrable microvascular meshes for subcutaneous islet transplantation

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Vascular Biology

Background:

• Engineered cell/tissue implant success relies on vascular regeneration for metabolic needs.
• Developing stable, functional vascularization strategies remains a significant challenge.
• Current methods often lack scalability and broad applicability.

Purpose of the Study:

• To engineer highly organized and resilient microvascular meshes.
• To establish a broadly applicable strategy for stable and functional vascularization.
• To demonstrate the potential for patient-specific microvasculature and therapeutic applications.

Main Methods:

• Controllable anchored self-assembly for microvascular mesh fabrication.
• Scalable fabrication of defect-free meshes transferable to diverse substrates.
• Utilizing human induced pluripotent stem cell-derived endothelial cells for mesh creation.

Main Results:

• Fabricated centimeter-scale, defect-free microvascular meshes.
• Achieved high functional blood vessel density (~220 vessels mm⁻²) in vivo.
• Demonstrated successful correction of chemically induced diabetes in mice using islet transplantation with microvascular meshes for 3 months.

Conclusions:

• Anchored self-assembly provides a scalable method for fabricating resilient microvascular meshes.
• Engineered microvasculature promotes functional blood vessel formation in vivo.
• This approach offers a promising platform for regenerative medicine and treating diseases like type 1 diabetes.