Bonding of Flexible Membranes for Perfusable Vascularized Networks Patch

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Vascular Biology

Background:

• In vitro generation of 3D vessel networks is essential for studying vascularization.
• Engineering complex vascular networks requires multiple cell types, extracellular matrix, and perfusability.
• Clinical applications necessitate robust vascularization strategies.

Purpose of the Study:

• To engineer a complex, perfusable vascular network in vitro for tissue regeneration.
• To develop a 3D vascularized network module using electrospun membranes.
• To assess the potential for clinical applications in regenerative medicine.

Main Methods:

• Electrospun membranes were fabricated and bonded to form a vascular network shape.
• Endothelial cells were cultured on the membranes with medium flow for perfusion.
• Perfusion culture was compared to static culture over 7 days.
• Pericytes were co-cultured to generate a more complex vascularized network.

Main Results:

• The engineered membranes demonstrated perfusability through the vascular network.
• Perfusion culture promoted greater cell proliferation and altered shear stress-related gene expression compared to static culture.
• Co-culture with pericytes led to Collagen I expression on the engineered structure's outer surface.

Conclusions:

• A perfusable in vitro engineered vascular network was successfully created using electrospun membranes.
• The 3D vascularized network module holds promise as a platform for drug screening.
• This technology is expected to advance regenerative medicine applications.