Cell Biochemistry and Biophysics

, Volume 70, Issue 1, pp 651–660

Mitochondrial P-Glycoprotein ATPase Contributes to Insecticide Resistance in the Cotton Bollworm, Helicoverpaarmigera (Noctuidae: Lepidoptera)

  • S. Md Akbar
  • Ravindra M. Aurade
  • H. C. Sharma
  • K. Sreeramulu
Original Paper

DOI: 10.1007/s12013-014-9969-5

Cite this article as:
Akbar, S.M., Aurade, R.M., Sharma, H.C. et al. Cell Biochem Biophys (2014) 70: 651. doi:10.1007/s12013-014-9969-5
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Abstract

Cotton bollworm, Helicoverpa armigera, is one of the most damaging polyphagous pests worldwide, which has developed high levels of resistance to commonly applied insecticides. Mitochondrial P-glycoprotein (Pgp) was detected in the insecticide-resistant strain of H. armigera using C219 antibodies, and its possible role was demonstrated in the efflux of xenobiotic compounds using spectrofluorometer. The TMR accumulated in mitochondria in the absence of ATP, and effluxed out in presence of ATP; the process of efflux was inhibited in the presence of ortho-vandate, an inhibitor of Pgp, in insecticide-resistant larvae of H. armigera. The mitochondria isolated from insecticide-resistant larvae were resistant to insecticide-induced inhibition of oxygen consumption and cytochrome c release. Membrane potential decreased in a dose-dependent manner in the presence of higher concentration of insecticides (>50 µM) in mitochondria of insecticide-resistant larvae. In conclusion, mitochondrial Pgp ATPase detected in the insecticide-resistant larvae influenced the efflux of xenobiotic compounds. Pgp might be involved in protecting the mitochondrial DNA and the components of the electron transport chain from damage due to insecticides, and contributing to the resistance to the deleterious effects of insecticides on the growth of insecticide-resistant H. armigera larvae.

Keywords

Helicoverpa armigera Mitochondria Multidrug resistance Pgp ATPase Insecticides 

Abbreviations

FCCP

Carbonyl cyanide p-(trifluoromethoxy) phenylhydrazone

MDR

Multidrug resistance

Pgp

P-glycoprotein

TMR

Tetramethylrosamine

Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  • S. Md Akbar
    • 1
    • 2
  • Ravindra M. Aurade
    • 1
  • H. C. Sharma
    • 2
  • K. Sreeramulu
    • 1
  1. 1.Department of BiochemistryGulbarga UniversityGulbargaIndia
  2. 2.International Crops Research Institute for the Semi-Arid Tropics (ICRISAT)PatancheruIndia

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