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Related Concept Videos

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...
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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...
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Inhibitors of Viral Protein Synthesis

Protein synthesis is indispensable for viral replication, as viruses lack the cellular machinery required for this process and must hijack the host's translational apparatus. In response, host cells deploy a critical innate immune defense involving interferons, specialized cytokines that play a central role in inhibiting viral propagation.Upon viral detection, infected cells release interferons that bind to receptors on adjacent uninfected cells, activating the JAK-STAT signaling pathway and...
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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...
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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...

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Updated: May 13, 2026

Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
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Published on: July 16, 2012

Are trans-complementation systems suitable for hepatitis C virus life cycle studies?

C Fournier1, G Duverlie, S Castelain

  • 1EA4294 Unité de Virologie Clinique et Fondamentale, Université de Picardie Jules Verne, Amiens, France.

Journal of Viral Hepatitis
|March 16, 2013
PubMed
Summary
This summary is machine-generated.

Trans-complementation systems in hepatitis C virus (HCV) research have advanced understanding of viral functions and assembly. These models are crucial for studying viral mechanisms and developing improved vaccine assays.

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Last Updated: May 13, 2026

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Published on: July 16, 2012

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13:04

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Published on: June 26, 2014

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Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Complementation is a known genetic mechanism in plus-strand RNA viruses.
  • Trans-complementation for Flaviviridae family viruses is documented, with the first hepatitis C virus (HCV) system reported in 2005.

Purpose of the Study:

  • To review the current state of HCV trans-complementation systems.
  • To discuss viral mechanisms investigated using these models.
  • To update on the production and characterization of trans-encapsidated particles.

Main Methods:

  • Development and utilization of HCV trans-complementation models.
  • Analysis of HCV protein functions, interactions, genome replication, and viral assembly.
  • Production and characterization of defective viruses and trans-encapsidated particles.

Main Results:

  • HCV trans-complementation models have significantly enhanced knowledge of viral protein functions and interactions.
  • These models facilitate the study of HCV genome replication and viral particle assembly.
  • Trans-complementation systems are instrumental in producing defective viruses for improved vaccine assays.

Conclusions:

  • HCV trans-complementation systems are vital tools in virology research.
  • Continued development and application of these models are essential for advancing HCV understanding and therapeutic strategies.
  • Further research into trans-encapsidated particles holds promise for vaccine development.