[Pathogenesis of human cancer].

Area of Science:

• Oncology
• Molecular Biology
• Hepatology

Context:

• Hepatocellular carcinoma (HCC) development is a complex multistep process.
• Understanding the roles of oncogenes and tumor suppressor genes is crucial in carcinogenesis research.

Purpose:

• To discuss the multistep nature of carcinogenesis, focusing on initiation and promotion in hepatocarcinogenesis.
• To explore the involvement of oncogene and antioncogene alterations in liver cancer development.

Summary:

• Carcinogenesis involves genetic alterations, including oncogene activation and antioncogene inactivation.
• Hepatitis B virus (HBV) integration can lead to chromosomal rearrangements, potentially inactivating cancer suppressor genes.
• Endogenously produced nitrosamines may also play a significant role in hepatocarcinogenesis.
• H-ras activation appears to be a later event in mouse models of carcinogenesis.

Impact:

• Provides insights into the molecular mechanisms underlying liver cancer.
• Highlights the potential role of HBV integration in genetic instability and cancer suppressor gene inactivation.
• Underscores the importance of considering both genetic and environmental factors in hepatocarcinogenesis research.