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Related Experiment Video

Updated: May 24, 2026

Reproducible dsRNA Microinjection and Oviposition Bioassay in Mosquitoes and House Flies
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Reproducible dsRNA Microinjection and Oviposition Bioassay in Mosquitoes and House Flies

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Do pollutants affect insecticide-driven gene selection in mosquitoes? Experimental evidence from transcriptomics.

Rodolphe Poupardin1, Muhammad Asam Riaz, Christopher M Jones

  • 1Laboratoire d'Ecologie Alpine-LECA, UMR 5553 CNRS-Université de Grenoble, France. rodolphe.poupardin@gmail.com

Aquatic Toxicology (Amsterdam, Netherlands)
|March 13, 2012
PubMed
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Mosquitoes exposed to environmental pollutants adapt differently to insecticide selection. This suggests that a mosquito's chemical environment influences the development of insecticide resistance, impacting disease control strategies.

Area of Science:

  • Environmental toxicology
  • Molecular entomology
  • Insecticide resistance research

Background:

  • Chemical insecticides are crucial for controlling disease-transmitting mosquitoes.
  • Insecticide resistance in mosquitoes poses a significant threat to public health programs.
  • The influence of the chemical environment on insecticide resistance development is understudied.

Purpose of the Study:

  • To investigate how environmental xenobiotics affect insecticide-driven selection mechanisms in mosquitoes.
  • To understand the impact of pollutants on the adaptive responses of mosquitoes to insecticides.
  • To identify genes involved in cross-resistance between xenobiotics and insecticides.

Main Methods:

  • Laboratory experiments using Aedes aegypti mosquito larvae.

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  • Exposure to sub-lethal concentrations of xenobiotics (fluoranthene) and permethrin.
  • Selection pressure with permethrin over 10 generations.
  • Transcriptome profiling using a 15k microarray and bioassays.

    • Main Results:

    • Selected mosquito strains showed a modest but significant increase in permethrin resistance.
    • Gene expression analysis revealed significant alterations in genes related to detoxification, transport, and metabolism.
    • Prior exposure to xenobiotics altered the selection of specific genes in response to permethrin.

    Conclusions:

    • Environmental pollutants can modify the adaptive response of mosquitoes to insecticide selection pressure.
    • The chemical environment plays a role in shaping the evolution of insecticide resistance mechanisms.
    • This highlights the need to consider environmental contaminants in mosquito control strategies.