Hepatocyte liver-assist systems--a clinical update

Area of Science:

• Biomedical Engineering
• Hepatology
• Regenerative Medicine

Background:

• Liver failure is a critical condition with limited treatment options beyond transplantation.
• Existing medical therapies are insufficient for liver failure refractory to treatment.
• Hepatocyte liver-assist systems represent a potential breakthrough therapy.

Purpose of the Study:

• To review key issues in the clinical testing of hepatocyte liver-assist systems.
• To highlight major contributions and unresolved questions in the field.
• To discuss the potential of these systems as a supportive therapy for liver failure.

Main Methods:

• Utilizing mammalian hepatocytes within a mechanical apparatus (e.g., hollow fiber cartridge).
• Employing extracorporeal perfusion to connect the system to patients.
• Evaluating system performance in human clinical trials for acute liver failure.

Main Results:

• At least two extracorporeal hepatocyte systems have demonstrated promise in human trials.
• One system has received FDA approval for a randomized multicenter clinical trial.
• These systems provide essential metabolic functions for patients with liver failure.

Conclusions:

• Hepatocyte liver-assist systems show significant potential as a supportive therapy for liver failure.
• Further clinical testing and research are crucial to address remaining questions.
• Advancements in this field offer hope for patients with refractory liver disease.