Related Experiment Video
Updated: Jul 21, 2025
08:58
Preparing Irradiated and Marked Male Aedes aegypti Mosquitoes for Release in an Operational Sterile Insect Technique Program
Published on: March 12, 2021
3.8K
Eliminating Malaria Vectors with Precision Guided Sterile Males
Andrea L Smidler1, Reema A Apte1, James J Pai1
1School of Biological Sciences, Department of Cell and Developmental Biology, University of California, San Diego, La Jolla, CA 92093.
Biorxiv : the Preprint Server for Biology
|July 28, 2023
Summary
New precision-guided sterile insect technique (pgSIT) effectively sterilizes male Anopheles gambiae mosquitoes and eliminates females. This genetic biocontrol offers a scalable solution for malaria vector control.
Area of Science:
- Entomology
- Genetics
- Vector Control
Background:
- Malaria transmission is driven by the Anopheles gambiae mosquito, a principal African vector.
- Existing insecticide-based control methods are failing due to increasing resistance.
- Current sterile insect technique (SIT) methods for Anopheles gambiae are lacking due to male fitness issues.
Approach:
- Developed precision guided Sterile Insect Technique (pgSIT) using a binary CRISPR strategy.
- Engineered Cas9 and gRNA strains to disrupt male fertility and female-essential genes.
- Achieved >99.5% male-sterility and >99.9% female-lethality in hybrid progeny.
Key Points:
- Genetically sterilized males exhibit good longevity and induce population suppression in cage trials.
- Mathematical models predict the elimination of wild Anopheles gambiae populations.
- This method enables scalable, SIT-like, and confinable suppression.
Conclusions:
- Precision guided SIT (pgSIT) provides a novel genetic biocontrol tool for Anopheles gambiae.
- This approach overcomes limitations of traditional SIT by ensuring male fitness.
- pgSIT is a promising strategy for malaria vector control and transmission reduction.
