Viral hepatitis B

Ching Lung Lai1, Vlad Ratziu, Man-Fung Yuen

  • 1Department of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong, People's Republic of China. hrmelcl@hkucc.hku.hk

Lancet (London, England)
|December 31, 2003
PubMed

Insights

Hepatitis B virus infection affects over 400 million people globally, leading to liver cancer and other severe conditions. Advances in vaccines and treatments offer hope for managing chronic hepatitis B (HBV) infection.

Area of Science:

  • Hepatology
  • Virology
  • Oncology

Background:

  • Chronic hepatitis B virus (HBV) infection impacts over 400 million individuals worldwide.
  • HBV is a leading cause of liver cancer, gastrointestinal hemorrhage, and ascites.
  • Significant progress in HBV diagnosis and treatment has been achieved.

Purpose of the Study:

  • To review recent breakthroughs in hepatitis B diagnosis and treatment.
  • To discuss the role of molecular virology in understanding HBV mutants.
  • To explore the clinical significance of low viral load and genotypes in HBV infection.

Main Methods:

  • Review of current literature on hepatitis B diagnosis and treatment.
  • Analysis of advances in molecular virology, including HBV mutants.
  • Investigation into the clinical significance of viral load and genotypes.

Main Results:

  • Hepatitis B vaccine effectively reduces liver cancer incidence.
  • Molecular virology has advanced understanding of naturally occurring and treatment-induced HBV mutants.
  • Current monotherapies (interferon, lamivudine, adefovir dipivoxil) rarely eradicate HBV but reduce viral replication, necroinflammation, and fibrosis progression.
  • Nucleoside analogues like lamivudine show potential in reversing liver cirrhosis.

Conclusions:

  • Hepatitis B vaccination is crucial for preventing liver cancer.
  • Ongoing research in molecular virology is key to understanding and combating HBV.
  • While not curative, current therapies significantly improve outcomes for chronic HBV patients, with potential for liver damage reversal.

Related Concept Videos

Viruses with RNA Genomes01:29

Viruses with RNA Genomes

RNA viruses are categorized into positive-strand, negative-strand, or double-stranded groups based on their genomic structure and replication mechanisms. This classification dictates how they exploit host cellular machinery for protein synthesis and replication. Some RNA viruses also utilize reverse transcription as part of their life cycle, further diversifying their replication strategies.Positive-Strand RNA VirusesPositive-strand RNA viruses have genomes that function directly as messenger...
Yellow Fever01:18

Yellow Fever

Yellow fever is a viral hemorrhagic disease caused by the yellow fever virus (YFV), a member of the Flaviviridae family. It is transmitted primarily by Aedes and Haemagogus mosquitoes in tropical and subtropical regions of Africa and South America. After transmission through a mosquito bite, the virus initially replicates in skin-resident immune cells such as dendritic cells and macrophages. These cells then migrate to the lymph nodes, where viral replication increases, eventually leading to...
Cytomegalovirus Disease01:27

Cytomegalovirus Disease

Cytomegalovirus (CMV) disease is caused by human cytomegalovirus, a double-stranded DNA virus of the Herpesviridae family. While primary CMV infection is often asymptomatic in immunocompetent individuals, the virus can cause severe disease in neonates and immunocompromised patients. CMV is the most common cause of congenital viral infection in the United States, and a major pathogen in solid organ and hematopoietic stem cell transplant recipients.CMV is transmitted via bodily fluids, sexual...
Hepatitis01:25

Hepatitis

Hepatitis is an inflammatory condition of the liver most commonly caused by hepatotropic viruses (A–E), though non-infectious causes such as alcohol and drugs also exist.Hepatitis AHepatitis A virus (HAV) is a non-enveloped RNA virus of the Picornaviridae family. It is primarily transmitted via the fecal-oral route, typically through ingestion of contaminated food or water. After ingestion, HAV enters the bloodstream through the oropharynx or intestinal epithelium and reaches the liver. The...
Inhibitors Of Virion Release01:25

Inhibitors Of Virion Release

Viral replication and dissemination rely on efficient mechanisms for host cell entry, genome replication, assembly, and release. Influenza viruses, such as types A and B, are negative-sense single-stranded RNA viruses with a segmented genome, that depend on two critical surface glycoproteins to carry out these processes: hemagglutinin (HA) and neuraminidase (NA). HA initiates infection by binding to sialic acid residues on the surface of host epithelial cells, facilitating receptor-mediated...
Viral Hepatitis I: Introduction01:28

Viral Hepatitis I: Introduction

Viral hepatitis is an inflammatory condition of the liver caused by infection with hepatotropic viruses, most commonly hepatitis A, B, C, D, and E. Despite variations in structure and transmission, all viruses mentioned infect hepatocytes and provoke immune responses that can hinder liver function. Additionally, some non-hepatotropic viruses can also lead to hepatic inflammation.Hepatitis A VirusHepatitis A virus (HAV) is transmitted through the fecal–oral route, typically by ingestion of food...