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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...
Mechanisms of Retrovirus-induced Cancers01:51

Mechanisms of Retrovirus-induced Cancers

Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
Mechanisms of Retrovirus-induced Cancers01:51

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Retroviruses are RNA viruses that have been shown to cause cancers in diverse species, including chickens, mice, cats, and monkeys. The RNA genomes of these viruses are first reverse-transcribed into single and then double-stranded DNA (dsDNA) copies. This dsDNA called proviral DNA then integrates into the host genome. Subsequently, the host cell transcribes the proviral DNA in concert with the chromosomal DNA. This leads to the production of viral RNA and proteins that assemble at the host...
Inhibitors of Virion Maturation and Assembly01:19

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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...
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.
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Inhibitors Of Virion Release01:25

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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...

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Related Experiment Video

Updated: May 28, 2026

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

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Published on: March 2, 2014

Beclin-1 targeting for viral immune escape.

Christian Münz1

  • 1Viral Immunobiology, Institute of Experimental Immunology, University of Zürich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland. christian.muenz@uzh.ch

Viruses
|October 14, 2011
PubMed
Summary

Viruses like herpesviruses, HIV, and influenza A inhibit cellular macroautophagy, a key immune process. They achieve this by targeting Beclin-1, crucial for autophagosome formation and function, to enhance viral replication.

Keywords:
HIVHSVKSHVautophagyimmune evasionimmunityinfluenza virus

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08:32

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Area of Science:

  • Cell biology
  • Immunology
  • Virology

Background:

  • Macroautophagy is a cellular process vital for immunity, aiding pathogen detection and antigen presentation.
  • Viruses have evolved mechanisms to evade or disrupt macroautophagy for their own benefit.
  • Beclin-1 is a critical protein in macroautophagy, involved in autophagosome formation and maturation.

Purpose of the Study:

  • To explore how viruses inhibit macroautophagy.
  • To understand the role of Beclin-1 in viral strategies targeting this pathway.
  • To discuss the implications of macroautophagy inhibition on viral replication.

Main Methods:

  • Review of existing literature on macroautophagy and viral interactions.
  • Analysis of viral protein interactions with Beclin-1.
  • Discussion of different viral strategies for inhibiting autophagosome generation and maturation.

Main Results:

  • Several viruses, including herpesviruses, HIV, and influenza A, inhibit macroautophagy.
  • Viral proteins often target Beclin-1 to disrupt autophagosome formation or fusion.
  • Inhibition of macroautophagy, either early or late in the process, benefits viral replication.

Conclusions:

  • Viral inhibition of macroautophagy is a common immune evasion strategy.
  • Targeting Beclin-1 is a key mechanism employed by various viruses.
  • Understanding these interactions is crucial for developing antiviral therapies.