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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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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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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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A Protocol for Analyzing Hepatitis C Virus Replication
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Published on: June 26, 2014

Hepatitis C virus replication in Caucasian HIV controllers.

E Ruiz-Mateos1, K Machmach, M C Romero-Sanchez

  • 1Immunovirology Laboratory and Biochemistry Department, Infectious Diseases Service, Virgen del Rocio University Hospital/Biomedicine Institute of Seville (IBIS), Avd. Manuel Siurot s/n, Seville Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain.

Journal of Viral Hepatitis
|June 23, 2011
PubMed
Summary

HIV controllers, individuals who naturally control HIV, exhibit lower hepatitis C virus (HCV) replication. This suggests shared immune mechanisms may combat both persistent viral infections.

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Area of Science:

  • Immunology
  • Virology
  • Hepatology

Background:

  • HIV controllers spontaneously control HIV viraemia.
  • The ability of HIV controllers to control hepatitis C virus (HCV) infection is not well understood.
  • Investigating host mechanisms against persistent infections.

Purpose of the Study:

  • To assess HCV replication control in Caucasian HIV controllers.
  • To identify factors associated with HCV control in HIV controllers.
  • To explore common host defense mechanisms against HIV and HCV.

Main Methods:

  • Compared HCV RNA levels, HCV genotypes, and HLA types in 75 HIV controllers and 261 HIV-infected noncontrollers.
  • Analyzed plasma HIV-1 and HCV RNA levels.
  • Determined anti-HCV antibodies, HCV genotype, and HLA typing.

Main Results:

  • No difference in spontaneous HCV clearance rates between groups.
  • HIV controllers showed significantly lower HCV viral loads.
  • HLA-B57 associated with lower HCV viral load; HLA-B35 with higher HCV viral load in HIV controllers.
  • HIV controller status, non-1 HCV genotype, HLA-B57, and absence of HLA-B35 independently predicted lower HCV viral load.

Conclusions:

  • Caucasian HIV controllers better control HCV replication, evidenced by lower viral loads.
  • Shared host immune mechanisms likely contribute to controlling both HIV and HCV infections.
  • Findings highlight the role of specific HLA types in viral load control.