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Updated: Nov 7, 2025

Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization
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Visualization of SARS-CoV-2 using Immuno RNA-Fluorescence In Situ Hybridization

Published on: December 23, 2020

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Functional landscape of SARS-CoV-2 cellular restriction

Laura Martin-Sancho1, Mary K Lewinski2, Lars Pache1

  • 1Immunity and Pathogenesis Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.

Molecular Cell
|April 30, 2021
PubMed

Insights

A weak interferon response contributes to severe COVID-19. Researchers identified specific interferon-stimulated genes (ISGs) that control SARS-CoV-2 replication, offering potential therapeutic targets for severe coronavirus disease 2019.

Area of Science:

  • Immunology
  • Virology
  • Molecular Biology

Background:

  • A deficient interferon (IFN) response is linked to severe coronavirus disease 2019 (COVID-19).
  • Understanding the molecular mechanisms of IFN control over SARS-CoV-2 is crucial for managing severe infections.

Purpose of the Study:

  • To identify specific human interferon-stimulated genes (ISGs) that inhibit SARS-CoV-2 replication.
  • To elucidate the roles of ISGs in innate immune control against SARS-CoV-2 and SARS-CoV-1.

Main Methods:

  • Conducted a large-scale gain-of-function analysis of human ISGs.
  • Evaluated the impact of ISGs on SARS-CoV-2 viral replication and entry.
  • Investigated specific ISGs, including BST2/tetherin and its interaction with SARS-CoV-2 Orf7a.

Main Results:

  • A subset of ISGs demonstrated significant control over viral infection.
  • Identified ISGs involved in inhibiting viral entry, RNA synthesis, and assembly/egress.
  • Discovered eight ISGs specifically inhibiting SARS-CoV-2 and SARS-CoV-1, including BST2/tetherin which restricts viral release.

Conclusions:

  • These findings highlight key ISGs essential for innate immune defense against SARS-CoV-2 and SARS-CoV-1.
  • The identified ISGs provide insights into host determinants of COVID-19 severity.
  • This research offers potential therapeutic strategies for COVID-19 by targeting specific ISGs.
Keywords:
BST2ISGOrf7aSARS-CoV-2innate immunityinterferonviral evasion

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