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Related Concept Videos

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...
Inhibitors Of Virion Release01:25

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...
Immune Response Against Viral Pathogens01:29

Immune Response Against Viral Pathogens

The immune system's response to viral infections is a complex and coordinated process involving natural killer (NK) cells, T cell-mediated responses, and antibody-mediated responses.
NK Cells
NK cells are a crucial part of our innate immune system, acting as the first line of defense against viral infections. These cells can recognize and kill infected cells without prior exposure to the virus, effectively slowing down the spread of infection. Additionally, NK cells produce proinflammatory...
Inhibitors of Virion Maturation and Assembly01:19

Inhibitors of Virion Maturation and Assembly

As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
Antiviral Nucleoside Inhibitors01:22

Antiviral Nucleoside Inhibitors

Antiviral Nucleoside InhibitorsAntiviral nucleoside inhibitors are structural analogs of natural nucleosides that interfere with viral DNA or RNA synthesis. These compounds selectively target viral polymerases due to their resemblance to host nucleosides, thereby disrupting viral genome replication.Mechanism of Acyclovir ActionAcyclovir is a guanosine analog with a three-carbon acyclic side chain. It selectively targets herpes simplex virus type 1 (HSV-1), herpes simplex virus type 2 (HSV-2),...
Antimicrobial Proteins01:23

Antimicrobial Proteins

Antimicrobial proteins are important components of the immune system. They aid the body in combating pathogens by either killing them directly or hindering their replication processes. Four main types of antimicrobial substances are interferons, the complement system, iron-binding proteins, and antimicrobial proteins.
Interferons
Interferons (IFNs) are proteins produced by lymphocytes, macrophages, and fibroblasts infected with viruses. While IFNs cannot prevent viruses from entering and...

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Related Experiment Video

Updated: Jul 13, 2026

Co-immunoprecipitation of the Mouse Mx1 Protein with the Influenza A Virus Nucleoprotein
09:39

Co-immunoprecipitation of the Mouse Mx1 Protein with the Influenza A Virus Nucleoprotein

Published on: April 21, 2015

Interferon, Mx, and viral countermeasures.

Otto Haller1, Georg Kochs, Friedemann Weber

  • 1Abteilung Virologie, Institut für Medizinische Mikrobiologie und Hygiene, Universität Freiburg, D-79008 Freiburg, Germany. otto.haller@uniklinik-freiburg.de

Cytokine & Growth Factor Reviews
|August 9, 2007
PubMed
Summary
This summary is machine-generated.

The interferon system is crucial for antiviral defense. Viruses have evolved complex strategies to evade this system, highlighting a dynamic interplay between host defense and viral evasion tactics.

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Last Updated: Jul 13, 2026

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Published on: April 21, 2015

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Development and Validation of an Ultrasensitive Single Molecule Array Digital Enzyme-linked Immunosorbent Assay for Human Interferon-α
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Development and Validation of an Ultrasensitive Single Molecule Array Digital Enzyme-linked Immunosorbent Assay for Human Interferon-α

Published on: June 14, 2018

Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • The interferon system is a critical innate immune defense against viral infections.
  • Defects in interferon signaling lead to severe susceptibility to viral diseases in both mice and humans.
  • Key interferon-induced antiviral pathways include the Mx pathway, protein kinase R (PKR), and the 2-5 OAS/RNaseL system.

Purpose of the Study:

  • To summarize recent findings on the intricate interactions between viruses and the interferon response pathway.
  • To highlight the diverse strategies viruses employ to counteract interferon-mediated immunity.

Main Methods:

  • Review of recent scientific literature on interferon signaling and viral evasion mechanisms.
  • Analysis of the molecular mechanisms underlying interferon-induced antiviral proteins, such as Mx proteins.
  • Examination of viral strategies to inhibit or escape interferon responses.

Main Results:

  • The Mx pathway, involving large GTPases, directly inhibits viral replication by blocking early stages.
  • Viruses employ multiple sophisticated strategies to evade the interferon system, including immune evasion and suppression.
  • The interplay involves viruses attempting to remain undetected, suppress interferon production, neutralize interferons, or inhibit antiviral protein function.

Conclusions:

  • The interferon system is a potent antiviral defense, but viruses have evolved effective counter-strategies.
  • Understanding this complex interplay is essential for developing new antiviral therapies.
  • Recent findings reveal the sophisticated molecular battles occurring during viral infections and interferon responses.