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Representative phase contrast micrographs showing the effect of NDGA on the damage induced by different concentrations of (a) IAA or (b) H2O2 in THP-1 cells. Cells were treated with vehicle (left side) or 20 μM NDGA (right side) by 12 h; after this the cells were exposed to IAA or H2O2 for 2 h. After this time these compounds were withdrawn and fresh medium with NDGA was added. Representative images were obtained 24 h after the onset of IAA or H2O2 exposure.
