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Related Experiment Video

Updated: Jul 14, 2025

Using Reverse Genetics to Manipulate the NSs Gene of the Rift Valley Fever Virus MP-12 Strain to Improve Vaccine Safety and Efficacy
09:13

Using Reverse Genetics to Manipulate the NSs Gene of the Rift Valley Fever Virus MP-12 Strain to Improve Vaccine Safety and Efficacy

Published on: November 1, 2011

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Identification of host factors for Rift Valley Fever Phlebovirus.

Velmurugan Balaraman1, Sabarish V Indran1, Yonghai Li1

  • 1Center of Excellence for Emerging and Zoonotic Animal Diseases and Department of Diagnostic Medicine/Pathobiology, College of Veterinary Medicine, Kansas State University, Manhattan, Kansas, United States of America.

Biorxiv : the Preprint Server for Biology
|October 9, 2023
PubMed
Summary

Researchers identified WDR7 as a key host factor essential for Rift Valley fever phlebovirus (RVFV) replication. This finding is crucial for developing new antiviral strategies against RVF.

Keywords:
A549 cellsLACVMP-12RVFVWDR7bunyavirushost factorphlebovirus

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Area of Science:

  • Virology
  • Molecular Biology
  • Genetics

Background:

  • Rift Valley fever phlebovirus (RVFV) causes Rift Valley fever (RVF) in humans and livestock.
  • No licensed human vaccines or antiviral drugs are currently available for RVF.
  • Host factors influencing RVFV susceptibility remain largely unknown.

Approach:

  • CRISPR-Cas9 screens were used to identify host genes critical for RVFV replication in human A549 cells.
  • Validated candidate genes using siRNA-mediated knockdowns and knockout studies.
  • Assessed viral replication by measuring intracellular viral RNA and virus titers.

Key Points:

  • Identified ~900 genes potentially involved in RVFV infection.
  • Silencing WDR7 and LRP1 significantly impaired RVFV replication.
  • WDR7 knockout cells showed reduced RVFV RNA and titers, affecting later replication phases.

Conclusions:

  • WDR7 is an essential host factor for the replication of RVFV and La Crosse encephalitis virus (LACV).
  • Further research will elucidate the mechanism by which WDR7 supports Phlebovirus replication.