[Hepatitis C virus infection and hepatocarcinogenesis]

Area of Science:

• Hepatology
• Virology
• Oncology

Context:

• Hepatitis B virus (HBV) and Hepatitis C virus (HCV) infections are significant causes of chronic hepatitis, liver cirrhosis, and hepatocellular carcinoma (HCC).
• HCV is recognized as an oncogenic virus, contributing to liver cancer development through mechanisms distinct from HBV.
• The association between non-A, non-B hepatitis (NANB) and liver cancer was noted before HCV identification, with subsequent studies confirming the link.

Purpose:

• To explore the common and distinct mechanisms of carcinogenesis induced by HBV and HCV.
• To investigate the role of HCV in HCC development, including cases that occur without cirrhosis.
• To highlight the importance of monitoring HCV-infected patients for HCC and discuss current clinical management.

Summary:

• HCC typically develops in the cirrhotic stage of chronic inflammation, but HCV can induce cancer through non-genomic integration mechanisms, potentially involving viral proteins, endoplasmic reticulum stress, oxidative stress, and insulin resistance.
• Differences in the HCV core gene have been observed between HCC patients with and without cirrhosis, suggesting a role in oncogenesis.
• While viral factors are key, host immune response and tumor cell elimination capacity also influence liver carcinoma development.

Impact:

• Understanding HCV's oncogenic pathways can inform targeted prevention and treatment strategies for liver cancer.
• Regular monitoring, including ultrasound check-ups, is crucial for early HCC detection in HCV-infected individuals.
• Current treatment protocols for HCV-induced HCC are similar to those for HCC arising from other liver diseases.