Experimental evaluation of a cell module for hybrid liver support

Area of Science:

• Hepatology
• Biomedical Engineering
• Regenerative Medicine

Background:

• Acute liver failure (ALF) poses a significant clinical challenge, often necessitating liver transplantation.
• Hepatectomy, a procedure involving the surgical removal of the liver, leads to acute liver failure and is a critical model for studying liver support systems.

Purpose of the Study:

• To evaluate the efficacy of a novel hybrid liver support system (HLSS) in a porcine model of acute liver failure induced by total hepatectomy.
• To assess the impact of the HLSS, incorporating bioengineered liver tissue, on survival rates and physiological parameters in a critical care setting.

Main Methods:

• Pigs underwent total hepatectomy, porto-cavo-caval shunting, and ligation of the bile duct and hepatic artery.
• The treatment group received HLSS with primary isolated porcine parenchymal liver cells co-cultured with hepatocyte nursing cells, engineered into dense, liver-like structures.
• Control animals received the HLSS without the cellular component.

Main Results:

• The HLSS with the cellular module significantly prolonged survival time compared to the control group (57 hours vs. 26 hours).
• Treatment group animals exhibited improved peripheral vascular resistance and a reduced requirement for catecholamine support.
• The engineered liver tissue demonstrated functional integration within the hybrid system.

Conclusions:

• The hybrid liver support system, featuring a bioengineered cellular module, offers a promising therapeutic strategy for acute liver failure post-hepatectomy.
• This approach significantly enhances survival and improves hemodynamic stability in a preclinical model.
• The study supports the clinical translation of cell-based liver support technologies for patients with severe liver dysfunction.