Viral Hepatitides, Inflammation and Tumour Microenvironment

Area of Science:

• Hepatology
• Oncology
• Immunology

Background:

• Hepatocellular carcinoma (HCC) is a major global health concern.
• Hepatitis B virus (HBV) and Hepatitis C virus (HCV) infections are primary risk factors for HCC development.
• Chronic inflammation plays a critical role in tumorigenesis.

Purpose of the Study:

• To elucidate the multifaceted roles of HBV and HCV in HCC pathogenesis.
• To highlight the intricate interplay between immune modulation, chronic inflammation, and cancer development.
• To discuss key molecular pathways implicated in HBV/HCV-associated HCC.

Main Methods:

• Review and synthesis of existing literature on HBV/HCV and HCC.
• Analysis of the roles of specific inflammatory cytokines (IL-6, TNF-α, IL-18, IL-1β, TGF-β, IL-10).
• Examination of immune checkpoint-mediated T cell exhaustion.
• Investigation of the Wnt3a/β-catenin signaling pathway.
• Assessment of regulatory/suppressor cell subsets in HCC microenvironment.

Main Results:

• HBV and HCV infections establish a pro-tumorigenic environment through immune evasion and chronic inflammation.
• Specific cytokines significantly contribute to the inflammatory milieu that promotes HCC.
• Immune checkpoints, Wnt3a/β-catenin signaling, and suppressor cells are critical in facilitating HCC progression.

Conclusions:

• HCC serves as a paradigm for inflammation-driven cancers, particularly in the context of viral hepatitis.
• Targeting inflammatory pathways, immune checkpoints, and cellular crosstalk presents potential therapeutic strategies for HBV/HCV-associated HCC.
• A comprehensive understanding of these complex mechanisms is essential for effective prevention and treatment of liver cancer.