Related Experiment Video
Updated: Jun 21, 2026

09:35
Development of a Hepatitis B Virus Reporter System to Monitor the Early Stages of the Replication Cycle
Published on: February 1, 2017
Hepatitis C Virus entry: the early steps in the viral replication cycle
1Department of Microbiology and Immunology, Tulane University Health Sciences Center, New Orleans, Louisiana, USA. asabahi@gmail.com
Virology Journal
|August 1, 2009
Summary
Hepatitis C virus (HCV) entry into cells was difficult to study. New HCV pseudo particle (HCVpp) and cell culture (HCVcc) systems now allow researchers to identify key cellular co-receptors involved in HCV infection.
Area of Science:
- Virology
- Cell Biology
- Immunology
Background:
- Hepatitis C virus (HCV) infects approximately 170 million people globally.
- Most acute HCV infections are asymptomatic, leading to chronic infection in many individuals.
- Studying HCV replication in vitro was challenging before the development of new systems.
Purpose of the Study:
- To review the literature on Hepatitis C virus (HCV) entry.
- To identify cellular co-receptors involved in HCV binding and entry.
- To contextualize findings based on experimental systems used.
Main Methods:
- Review of existing scientific literature.
- Analysis of studies using purified viral envelope proteins.
- Evaluation of data from HCV pseudo particle (HCVpp) and HCV cell culture (HCVcc) systems.
- Consideration of findings from patient sera.
Main Results:
- HCVpp and HCVcc systems have significantly advanced the understanding of HCV's early replication steps.
- These systems have facilitated the identification of cellular co-receptors essential for HCV binding and entry.
- The review synthesizes data from various experimental models.
Conclusions:
- The development of in vitro systems like HCVpp and HCVcc has been crucial for studying HCV entry.
- Understanding cellular co-receptors is key to deciphering the mechanisms of HCV infection.
- Further research into HCV entry pathways can inform therapeutic strategies.
Related Concept Videos
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...
Retrovirus Life Cycles
Retroviruses have a single-stranded RNA genome that undergoes a special form of replication. Once the retrovirus has entered the host cell, an enzyme called reverse transcriptase synthesizes double-stranded DNA from the retroviral RNA genome. This DNA copy of the genome is then integrated into the host’s genome inside the nucleus via an enzyme called integrase. Consequently, the retroviral genome is transcribed into RNA whenever the host’s genome is transcribed, allowing the retrovirus to...
What are Viruses?
Overview
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 Replication: Lytic Cycle
Bacteriophages, or phages, are viruses that specifically infect bacteria. Among them, T-even bacteriophages, such as T4, exhibit a well-characterized lytic replication cycle in Escherichia coli (E. coli). This process ensures the rapid proliferation of the virus while ultimately leading to the destruction of the bacterial host.Attachment and DNA InjectionThe infection process begins with the recognition and binding of the T4 phage to the E. coli cell surface. Tail fibers of the phage...
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...

