Cytotoxicity of complexes 1, 5, and 9 on THP-1 cells.

<p>THP-1 cells were treated with the decreasing concentration (10–0.039 μM) of 1, 5, and 9, respectively. The number of metabolically active cells was determined by the WST-1 test after 24 h of incubation. The viability was calculated in comparison to the vehicle-treated cells. The results are expressed as means ± S.E. for three independent experiments.