Related Experiment Videos

Resistance to the Bacillus sphaericus toxin in cultured mosquito cells

J M Schroeder1, C Chamberlain, E W Davidson

  • 1Department of Zoology, Arizona State University, Tempe 85287.

In Vitro Cellular & Developmental Biology : Journal of the Tissue Culture Association
|October 1, 1989
PubMed

Insights

Researchers developed a toxin-resistant cell line from the Culex quinquefasciatus mosquito using Bacillus sphaericus toxin. This resistant line maintained high toxin resistance even after prolonged culture without the toxin.

Area of Science:

  • Molecular Biology
  • Entomology
  • Toxicology

Background:

  • Bacillus sphaericus toxin is a key agent in mosquito control.
  • Developing insecticide resistance is a significant challenge in vector control.

Purpose of the Study:

  • To develop and characterize a toxin-resistant cell line of Culex quinquefasciatus.
  • To investigate the stability and binding properties of the resistant cell line.

Main Methods:

  • Selection of resistant cells using increasing doses of Bacillus sphaericus toxin.
  • Isozyme analysis and karyotype to confirm cell line origin.
  • Fluorescent-labeled toxin binding assays.

Main Results:

  • A highly toxin-resistant Culex quinquefasciatus cell line was successfully established.
  • Isozyme and karyotype analyses confirmed the cell line's origin.
  • The resistant line exhibited toxin binding similar to the susceptible line.
  • High resistance levels were maintained for at least 4 months without toxin exposure.

Conclusions:

  • Culex quinquefasciatus cells can rapidly develop and maintain high resistance to Bacillus sphaericus toxin.
  • Toxin binding mechanisms may not be solely responsible for the observed resistance.
  • This resistant cell line is a valuable tool for studying insecticide resistance in mosquitoes.

Related Concept Videos