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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...
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 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...
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...
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...
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),...

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Related Experiment Video

Updated: Jul 4, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
08:32

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production

Published on: March 2, 2014

Interferon-inducible antiviral effectors.

Anthony J Sadler1, Bryan R G Williams

  • 1Monash Institute of Medical Research, Monash University, Clayton, Victoria 3168, Australia.

Nature Reviews. Immunology
|June 26, 2008
PubMed
Summary
This summary is machine-generated.

Interferons (IFNs) activate four key pathways to combat viral infections by blocking transcription, degrading RNA, and inhibiting translation. Research continues to uncover more functions of these antiviral proteins.

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Last Updated: Jul 4, 2026

Dissecting Innate Immune Signaling in Viral Evasion of Cytokine Production
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Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • Interferons (IFNs) are crucial cytokines involved in the innate immune response against viral infections.
  • Significant advancements have been made in understanding IFN signaling and antiviral mechanisms.

Purpose of the Study:

  • To review the distinct effector pathways of the IFN-mediated antiviral response.
  • To highlight the diverse mechanisms by which IFNs control viral replication.

Main Methods:

  • Review of existing literature on interferons and antiviral pathways.
  • Analysis of gene targeting studies to identify key effector mechanisms.

Main Results:

  • Four major IFN-effector pathways identified: Mx GTPase, 2',5'-oligoadenylate synthetase-RNase L, protein kinase R, and ISG15 ubiquitin-like.
  • These pathways collectively inhibit viral transcription, RNA degradation, translation, and protein function.

Conclusions:

  • IFN-induced effector pathways provide a comprehensive defense against viral replication at multiple stages.
  • Ongoing research continues to reveal novel activities and functions of these antiviral response components.