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Related Experiment Video

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Multiplexed Isothermal Amplification Based Diagnostic Platform to Detect Zika, Chikungunya, and Dengue 1
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Engineered Antiviral Sensor Targets Infected Mosquitoes.

Elena Dalla Benetta1, Adam J López-Denman2, Hsing-Han Li1

  • 1Department of Cell and Developmental Biology, School of Biological Sciences, University of California, San Diego, La Jolla, California, USA.

The CRISPR Journal
|December 18, 2023
PubMed
Summary

Researchers developed REAPER, a CRISPR-Cas13 system, to combat mosquito-borne viruses like chikungunya. This RNA-targeting technology destroys viral RNA, reduces infection, and can kill infected mosquitoes, offering a new tool against arboviruses.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Vector-borne Diseases

Background:

  • Vector-borne diseases pose significant global health threats, necessitating novel mosquito control strategies.
  • CRISPR-Cas9 systems are effective for DNA targeting but cannot address RNA viruses.
  • CRISPR-Cas13 systems offer programmable RNA targeting, but their application in mosquitoes remains limited.

Purpose of the Study:

  • To engineer an antiviral strategy using CRISPR-Cas13 for targeting arboviruses in mosquitoes.
  • To evaluate the efficacy of the REAPER system in reducing viral replication and infection prevalence.
  • To assess the potential of REAPER-mediated RNA targeting and collateral activity for mosquito population control.

Main Methods:

  • Engineered the REAPER (vRNA Expression Activates Poisonous Effector Ribonuclease) system utilizing CRISPR-Cas13.
  • Designed REAPER to remain dormant until an infectious blood meal is ingested.
  • Activated REAPER upon detection of target viral RNA to trigger programmed destruction.

Main Results:

  • REAPER effectively targeted and destroyed arboviral RNA, such as chikungunya virus.
  • Cas13-mediated RNA targeting significantly reduced viral replication and infection prevalence in mosquitoes.
  • The system's collateral activity led to the death of infected mosquitoes within days.

Conclusions:

  • The REAPER technology represents an innovative CRISPR-Cas13-based antiviral strategy for mosquitoes.
  • This system effectively combats arbovirus transmission by targeting viral RNA and impacting mosquito survival.
  • REAPER expands the molecular genetic toolkit for controlling mosquito-borne diseases.