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Updated: Jul 10, 2025

Imaging of HIV-1 Envelope-induced Virological Synapse and Signaling on Synthetic Lipid Bilayers
11:45

Imaging of HIV-1 Envelope-induced Virological Synapse and Signaling on Synthetic Lipid Bilayers

Published on: March 8, 2012

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HIV-1 Induced Cell-to-Cell Fusion or Syncytium Formation

Tobias Starling1, Sergi Padilla-Parra2,3

  • 1Department of Infectious Diseases, King's College London, Faculty of Life Sciences & Medicine, London, UK.

Results and Problems in Cell Differentiation
|November 23, 2023
PubMed

Insights

Cell-to-cell transmission is the primary way Human Immunodeficiency Virus type 1 (HIV-1) spreads in the body, surpassing cell-free infection. Understanding this process is key to developing new treatments.

Area of Science:

  • Virology
  • Immunology
  • Cell Biology

Background:

  • Cell-free Human Immunodeficiency Virus type 1 (HIV-1) infection is well-studied, but its in vitro relevance is debated.
  • Cell-to-cell transmission is increasingly recognized as the dominant HIV-1 spread mechanism within hosts, though molecular details are unclear.

Purpose of the Study:

  • To review the significance of cell-to-cell HIV-1 transmission.
  • To explore the molecular mechanisms underlying efficient cell-to-cell HIV-1 spread.
  • To discuss HIV-1 induced cell-cell fusion and syncytia formation.

Main Methods:

  • Literature review and analysis of existing studies on HIV-1 transmission.
  • Discussion of viral entry and transinfection mechanisms.
  • Exploration of host immune manipulation during cell-to-cell spread.

Main Results:

  • Cell-to-cell HIV-1 transmission is potent, effectively targeting uninfected cells and evading restriction factors.
  • This mode of transmission accelerates latent reservoir formation.
  • The frequency and regulation of HIV-1 induced syncytia formation remain key research questions.

Conclusions:

  • Cell-to-cell transmission is a critical, potent pathway for HIV-1 spread in vivo.
  • Further research into the molecular intricacies of cell-to-cell fusion and syncytia formation is needed.
  • Understanding these processes can inform novel therapeutic strategies against HIV-1.

Keywords:
Cell-cell fusionHIV-1 entryHIV-1 transinfectionSyncytia

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