Acute liver failure

Area of Science:

• Hepatology
• Virology
• Toxicology

Background:

• Viral infections are the primary cause of acute liver failure worldwide, potentially exacerbated by chronic viral hepatitis.
• Drug-induced hepatotoxicity, particularly from acetaminophen and Ecstasy, is a leading cause in the USA and Western Europe.
• Hepatic encephalopathy and cerebral edema are severe, life-threatening complications with incompletely understood pathogenesis, possibly linked to ammonia metabolism.

Purpose of the Study:

• To review the etiological agents and management strategies for acute liver failure.
• To highlight the role of viral infections and drug toxicity in acute liver failure.
• To discuss complications like hepatic encephalopathy and current and future treatment options.

Main Methods:

• Literature review of viral infections, drug-induced liver injury, and acute liver failure.
• Analysis of etiological factors including hepatitis G virus, transfusion-transmitted virus, acetaminophen, and Ecstasy.
• Evaluation of treatment modalities such as induced hypothermia and liver transplantation.

Main Results:

• Hepatotrophic viruses like hepatitis G virus are unlikely major causes of acute liver failure.
• Acetaminophen and Ecstasy are significant causes of drug-induced liver injury leading to acute liver failure.
• Induced hypothermia shows promise for cerebral edema, but emergency liver transplantation is the only proven survival-improving treatment.

Conclusions:

• Acute liver failure has diverse causes, with viral infections and drug toxicity being prominent.
• Management of complications like cerebral edema is critical, with liver transplantation offering the best survival outcome.
• Advancements in liver transplantation, including living donor and auxiliary options, are expected to improve patient survival and reduce immunosuppression needs.