Journal: Archives of toxicology
Article Title: Polymyxin B causes DNA damage in HK-2 cells and mice
doi: 10.1007/s00204-018-2192-1
Figure Lengend Snippet: PMB had high affinity for DNA and inhibited electrophoretic migration of plasmid at higher concentrations. (A) 60 ng of pBlueScript II DNA incubated with PMB (12.5–500 μM) in a topoisomerase I buffer for 2 h at 37 °C. Samples were resolved by electrophoresis. (B) Chemical structure of PMB with potential DNA binding sites (including the Dab residues) highlighted.
Article Snippet: In brief, a 20-μL reaction containing 60 ng pBlueScript II SK(+) plasmid DNA (Stratagene), polymyxin B (12.5–500 μM), or ddH 2 O (control) was incubated at 37 °C for 2 h in topoisomerase I buffer (NEB).
Techniques: Migration, Plasmid Preparation, Incubation, Electrophoresis, Binding Assay