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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...
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...
Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
These interactions can be represented through maps depicting protein-protein interaction networks, represented as nodes and edges. Nodes are circles that are representative of a protein,...
Protein Networks02:26

Protein Networks

An organism can have thousands of different proteins, and these proteins must cooperate to ensure the health of an organism. Proteins bind to other proteins and form complexes to carry out their functions. Many proteins interact with multiple other proteins creating a complex network of protein interactions.
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Inhibitors of Viral Protein Synthesis01:30

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...
Cirrhosis II: Pathophysiology01:24

Cirrhosis II: Pathophysiology

Cirrhosis is a progressive chronic liver injury caused by prolonged inflammation, excessive fibrotic remodeling, and impaired regeneration. Over time, repeated hepatic insults disrupt the liver’s architecture and function, leading to reduced blood flow, impaired bile drainage, and diminished metabolic capacity.Pathophysiology of cirrhosisCirrhosis arises from three main responses to chronic liver damage: inflammation, immune activation, and hepatocyte death. These processes lead to structural...

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Related Experiment Video

Updated: Jun 28, 2026

A Protocol for Analyzing Hepatitis C Virus Replication
13:04

A Protocol for Analyzing Hepatitis C Virus Replication

Published on: June 26, 2014

Hepatitis C virus infection protein network.

B de Chassey1, V Navratil, L Tafforeau

  • 1IMAP Team, Inserm Unit 851, Lyon, France.

Molecular Systems Biology
|November 6, 2008
PubMed
Summary

This study maps hepatitis C virus (HCV) protein interactions with human cells, revealing key cellular pathways and proteins disrupted by HCV infection, including focal adhesion. Understanding these interactions aids in developing targeted therapies for chronic HCV.

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Area of Science:

  • Virology
  • Molecular Biology
  • Systems Biology

Background:

  • Hepatitis C virus (HCV) infection involves complex interactions between viral and host cellular proteins.
  • A comprehensive understanding of these interactions is crucial for elucidating viral pathogenesis and identifying therapeutic targets.

Purpose of the Study:

  • To perform a proteome-wide mapping of protein-protein interactions between HCV and human proteins.
  • To identify cellular pathways and host factors targeted by HCV during infection.
  • To construct a protein network associated with clinical disorders in chronically infected patients.

Main Methods:

  • Yeast two-hybrid screening to identify novel HCV-human protein interactions.
  • Literature mining to gather existing interaction data.
  • Integration of interaction data into a reconstructed human interactome for network analysis.
  • Functional annotation and pathway enrichment analysis.

Main Results:

  • Identified 314 novel protein-protein interactions between HCV and human proteins, with 170 from literature mining.
  • HCV-interacting cellular proteins are highly central and interconnected within the human interactome.
  • HCV targets enriched cellular pathways, including insulin, Jak/STAT, and TGF-beta signaling.
  • Focal adhesion was identified as a newly affected cellular function, primarily by HCV NS3 and NS5A proteins.
  • HCV CORE protein emerged as a significant perturbator of the constructed protein network.

Conclusions:

  • This study provides a comprehensive map of HCV-host protein interactions, revealing critical cellular pathways and host factors involved in infection.
  • The findings highlight the central role of specific host proteins and pathways in HCV pathogenesis.
  • The identification of focal adhesion as a targeted pathway and the role of CORE, NS3, and NS5A proteins offer new insights for therapeutic strategies against chronic HCV.