Native and decellularized porcine vena cava: Histological analysis and in vitro repopulation

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Vascular Surgery

Background:

• Current vascular grafts utilize autologous or synthetic materials, each with limitations such as donor site morbidity, infection risk, and immune rejection.
• Decellularized tissues offer a promising alternative by preserving the extracellular matrix scaffold, promoting cell integration and minimizing immunogenicity.

Purpose of the Study:

• To evaluate the efficacy of decellularized porcine vena cava as a potential scaffold for vascular reconstruction.
• To characterize the structural and cellular properties of the decellularized tissue.
• To assess the biocompatibility and functionalization potential with human endothelial cells.

Main Methods:

• Porcine vena cava underwent decellularization using Triton X-100 and sodium dodecyl sulfate.
• Histological staining and proteomic analysis were performed to characterize the extracellular matrix structure.
• In vitro studies involved repopulating the decellularized scaffold with human endothelial cells under static and dynamic conditions using a custom bioreactor.

Main Results:

• The decellularization process effectively removed cellular components while preserving the extracellular matrix.
• Quantitative analysis confirmed structural integrity, including wall thickness and collagen/elastin content.
• Human endothelial cells demonstrated successful adhesion and proliferation on the decellularized scaffold, indicating good biocompatibility and lumen functionalization potential.

Conclusions:

• Decellularized porcine vena cava is a viable biomaterial for vascular graft development.
• The scaffold supports endothelialization, crucial for creating a functional and biocompatible vascular graft.
• Further research may lead to improved vascular reconstruction techniques with reduced complications.