Acute-on-chronic liver failure: from definitions to management.

Area of Science:

• Hepatology
• Critical Care Medicine
• Immunology

Background:

• Acute-on-chronic liver failure (ACLF) is a critical condition characterized by rapid deterioration of chronic liver disease (CLD), leading to multi-organ dysfunction and high short-term mortality.
• The definition of ACLF is not universally agreed upon, but its clinical presentation is recognized globally, with variations in underlying causes and incidence based on region.
• Common triggers for ACLF include bacterial infections, alcohol-associated hepatitis, viral hepatitis flares, and drug-induced liver injury.

Purpose of the Study:

• To review the definitions, prognosis, and clinical course of ACLF.
• To emphasize the critical importance of early recognition and timely intervention in managing ACLF.
• To highlight current therapeutic strategies and the role of liver transplantation and palliative care.

Main Methods:

• This review synthesizes current knowledge on ACLF through a comprehensive literature search.
• Analysis of existing data on diagnostic criteria, epidemiological variations, and pathophysiological mechanisms.
• Evaluation of therapeutic options, including supportive care, emerging therapies, liver transplantation, and palliative care.

Main Results:

• ACLF pathophysiology involves immune dysregulation and circulatory collapse, resulting in organ failure (OF), with mortality increasing proportionally to the number of OFs.
• Current therapeutic strategies are primarily supportive, with no disease-modifying therapies proven effective for long-term survival.
• Liver transplantation (LT) offers the only curative option for selected ACLF patients, necessitating early evaluation.

Conclusions:

• Early recognition and prompt management are paramount for improving outcomes in ACLF patients.
• Integrated care involving palliative care (PC) and timely transplant evaluation is essential due to high mortality risks.
• Further research into effective disease-modifying therapies is needed, alongside optimized supportive care and transplantation protocols.