Table 1

Cytotoxicity of oxaliplatin and cisplatin

Cell LineTreatmentGI50
CisplatinOxaliplatin
μM
CEMContinuous1-a 1.11  ± 0.051.19  ± 0.17
CEMPulse 1 h1-b 11.37  ± 1.4811.38  ± 1.12
A2780Continuous1-c 0.38  ± 0.160.21  ± 0.04
A2780PRContinuous1-c 3.82  ± 0.312.22  ± 0.74
HCT116Continuous1-c 11.73  ± 0.301.79  ± 0.19
HT29Continuous1-c 8.27  ± 1.901.28  ± 0.29
  • 1-a  Determined based on cell counts after a continuous incubation for 48 h (approximately 3 × cell generation time) with drug concentrations ranging from 0.01 to 100 μM.

  • 1-b  Determined based on cell counts after a 1-h pulse treatment with drug concentrations ranging from 0.1 to 100 μM, followed by a 48-h postincubation in drug-free medium.

  • 1-c  Determined by the MTT assay after a 72-h incubation (approximately 3 × cell generation times) with drug concentrations ranging from 0.075 to 200 μM.