Decellularized liver as a practical scaffold with a vascular network template for liver tissue engineering

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• Tissue Engineering

Background:

• The liver is vital, but creating functional, organ-scale liver tissue via tissue engineering is challenging due to the need for a dense vascular network.
• Existing tissue engineering approaches struggle to replicate the liver's complex vasculature, limiting functional tissue development.

Purpose of the Study:

• To investigate decellularization technology as a method to create a liver tissue scaffold with an intrinsic, high-density vascular network.
• To assess the suitability of the decellularized liver scaffold for supporting endothelialization and hepatocyte integration.

Main Methods:

• Decellularization of liver tissue using Triton X-100 to preserve the vascular tree structure.
• Endothelialization of the vascular network using human umbilical vein endothelial cells (HUVECs).
• Assessment of cell integration and scaffold integrity.

Main Results:

• A decellularized liver scaffold was successfully created, retaining a fine vascular tree network with inter-vascular distances under 1 mm.
• Endothelialization of the scaffold's vascular network with HUVECs was achieved without leakage.
• Hepatocytes or spheroids were successfully localized around the vascular structures within the scaffold.

Conclusions:

• Decellularized liver tissue serves as a promising scaffold for tissue engineering functional liver constructs.
• The developed method overcomes vascularization challenges, offering a potential solution for creating organ-scale engineered tissues.
• This approach advances the field of regenerative medicine for liver tissue replacement.