Alcohol-associated liver cancer

Area of Science:

• Hepatology
• Oncology
• Gastroenterology

Background:

• Heavy alcohol intake is a significant global risk factor for liver disease, including hepatocellular carcinoma (HCC).
• Alcohol-associated HCC (A-HCC) is less understood than HCC linked to viral hepatitis, with unclear direct carcinogenic pathways from ethanol.
• Existing research shows a gap in understanding A-HCC's clinical prognosis, genetic/epigenetic profiles, molecular mechanisms, and heterogeneity compared to other HCC types.

Purpose of the Study:

• To review and synthesize current knowledge on the pathogenesis and heterogeneity of A-HCC.
• To explore preclinical models and the epigenetic and genetic profiles of A-HCC.
• To identify future research directions and discuss alcohol's impact on cholangiocarcinoma and liver metastasis.

Main Methods:

• Literature review of existing studies on alcohol-associated liver disease and HCC.
• Analysis of research on the molecular mechanisms, genetic, and epigenetic alterations in A-HCC.
• Discussion of preclinical models and their limitations in A-HCC research.

Main Results:

• A-HCC development is often preceded by alcohol-associated cirrhosis, but direct ethanol carcinogenesis is not fully elucidated.
• Significant knowledge gaps exist regarding the clinical, molecular, and genetic differences between A-HCC and HCC from other causes.
• There is a critical need for robust preclinical models to bridge basic research and clinical practice for A-HCC.

Conclusions:

• A-HCC remains poorly characterized, necessitating further investigation into its unique pathogenesis, molecular landscape, and clinical behavior.
• Developing effective preclinical models is crucial for advancing A-HCC research and improving patient outcomes.
• Future research should focus on understanding the specific mechanisms driving A-HCC and its potential overlap with other liver malignancies.