Hepatitis B virus infection: An insight into the clinical connection and molecular interaction between hepatitis B virus and host extrahepatic cancer risk

Front Immunol. 2023 Mar 1:14:1141956. doi: 10.3389/fimmu.2023.1141956. eCollection 2023.

Abstract

The evidence for chronic hepatitis B virus (HBV) infection and hepatocellular carcinoma (HCC) occurrence is well established. The hepatocyte epithelium carcinogenesis caused by HBV has been investigated and reviewed in depth. Nevertheless, recent findings from preclinical and observational studies suggested that chronic HBV infection is equally important in extrahepatic cancer occurrence and survival, specifically gastrointestinal system-derived cancers. Immune microenvironment changes (immune-suppressive cytokine infiltration), epigenetic modification (N6-methyladenosine), molecular signaling pathways (PI3K-Akt and Wnt), and serum biomarkers such as hepatitis B virus X (HBx) protein are potential underlying mechanisms in chronic HBV infection-induced extrahepatic cancers. This narrative review aimed to comprehensively summarize the most recent advances in evaluating the association between chronic HBV infection and extrahepatic cancer risk and explore the potential underlying molecular mechanisms in the carcinogenesis induction of extrahepatic cancers in chronic HBV conditions.

Keywords: extrahepatic cancer; hepatitis B virus; immune microenvironment; molecular mechanisms; risk factor.

Publication types

  • Review
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Carcinogenesis
  • Carcinoma, Hepatocellular* / pathology
  • Hepatitis B virus
  • Hepatitis B*
  • Hepatitis B, Chronic* / complications
  • Humans
  • Liver Neoplasms* / pathology
  • Phosphatidylinositol 3-Kinases
  • Tumor Microenvironment

Substances

  • Phosphatidylinositol 3-Kinases

Grants and funding

The work was supported by the National Key Research and Development Program of China (2021YFE0206600), the National Natural Science Foundation of China (82172842 and 81672386), the Sichuan Province Science and Technology Support grant, and Tianfu Laboratory (2022SYSX0064, 2021YFSY0008, 2020YFS0276), West China Nursing Discipline Development Special Fund Project (HXHL21008). The funders had no role in the study design, data collection, analysis, decision to publish, or preparation of the manuscript.