Related Experiment Video
Updated: Jun 23, 2026
13:04
A Protocol for Analyzing Hepatitis C Virus Replication
Published on: June 26, 2014
[Replication of hepatitis C virus genome].
1Department of Tumor Virology, Okayama University Graduate School of Medicine, Dentistry, and Pharmaceutical Sciences. nkato@md.okayama-u.ac.jp
Uirusu
|April 21, 2009
Summary
Hepatitis C virus (HCV) RNA replication systems show time-dependent accumulation of genetic mutations and increased diversity. Adaptive mutations are key features, enabling replication in new cell lines beyond HuH-7.
Area of Science:
- Virology
- Molecular Biology
- Hepatology
Context:
- Hepatitis C virus (HCV) replication mechanisms were advanced by developing cell culture-based subgenomic and genome-length RNA replication systems.
- These systems, enhanced with reporter genes like luciferase, are crucial for screening anti-HCV reagents.
Purpose:
- To investigate the genetic dynamics of HCV RNA during replication in cell culture.
- To understand the role of adaptive mutations in HCV RNA replication and host cell adaptation.
Summary:
- Genetic analysis revealed time-dependent accumulation of mutations and increased genetic diversity in HCV RNAs within replication systems.
- Adaptive mutations are a characteristic feature, facilitating the development of novel HCV RNA replication systems.
- A specific combination of adaptive mutations enabled the establishment of HCV replication in a new human hepatoma cell line, expanding beyond the commonly used HuH-7 cells.
Impact:
- Provides insights into the evolutionary mechanisms of HCV replication.
- Facilitates the development of more versatile cell-based models for studying HCV and screening antiviral drugs.
- Highlights the potential for adapting HCV replication to different cellular contexts, aiding in broader research applications.
Related Concept Videos
01:25Hepatitis
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...
01:29Viruses 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...
01:10Retrovirus 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...
01:26Size and Structure of Viral Genomes
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
01:28Viral 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...
02:33Retroviruses
Retroviruses and retrotransposons both insert copies of their genetic elements into the genome of the host cell. Thus, the viral genes are passed on when the host genome is replicated or translated. A typical retroviral DNA sequence contains 3-4 genes that encode the different proteins required for its structural assembly and function as a molecular parasite. This DNA is transcribed into a single mRNA, which is very similar in structure to conventional mRNAs, i.e., it is capped at the 5’...