Etoposide-resistance in the multidrug-resistant LZ-8 cells

Academic Article


  • The multidrug-resistant LZ-8 cells were found to exhibit marked resistance to etoposide compared to wild-type, parental V79 cells. The multidrug resistant phenotype did not significantly contribute to this etoposide-resistance. Following exposure of LZ-8 cells and V79 cells to equivalent concentrations of etoposide, there was a dramatic reduction in the number of etoposide-induced stabilized DNA-topoisomerase II complexes in the LZ-8 cells compared to V79 cells, however, this reduction was not found when nuclei isolated from LZ-8 and V79 cells were exposed to equivalent concentrations of etoposide. These results suggest that cytoplasmic factors are involved in the etoposide-resistance of LZ-8 cells.
  • Author List

  • Liengswangwong V; Haddock MG; Sognier MA; Belli JA; Bonner JA
  • Start Page

  • 773
  • End Page

  • 780
  • Volume

  • 34
  • Issue

  • 4