An aorta ECM extracted hydrogel as a biomaterial in vascular tissue engineering application

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Regenerative Medicine

Background:

• Biological scaffolds are crucial for tissue engineering, with biopolymers from extracellular matrix (ECM) showing promise in tissue repair.
• Natural polymeric hydrogels offer advantages like availability and cost-effectiveness for scaffold development.

Purpose of the Study:

• To prepare and characterize a bioactive scaffold from bovine aorta-derived natural polymeric hydrogel for vascular tissue engineering.
• To evaluate the effect of varying aorta hydrogel concentrations on scaffold properties and cellular response.

Main Methods:

• Freeze-drying method to create 3D porous sponges from bovine aorta hydrogel.
• Characterization using mechanical tests, FTIR, SEM, porosity, and PBS absorption analysis.
• Assessment of human umbilical vein cord cell (HUVEC) morphology, proliferation, and migration on scaffolds; histological analysis (MT, H&E, VVG, AB).

Main Results:

• Scaffolds exhibited porosity exceeding 90% with well-preserved ECM components (collagen, elastin, glycosaminoglycan).
• The 4% aorta-ECM concentration demonstrated superior support for HUVEC survival, proliferation, and migration compared to 2% and 3% concentrations.
• Scaffold architecture and interconnected pores were suitable for vascular tissue engineering applications.

Conclusions:

• Bovine aorta-derived hydrogel is a viable, cost-effective source for bioactive scaffolds in vascular tissue engineering.
• Optimized scaffold concentration (4% aorta-ECM) promotes cellular functions essential for tissue regeneration.
• The developed scaffolds maintain native ECM integrity, supporting cellular integration and tissue repair potential.