Low concentrations of <i>p,p′</i>-DDE promote colorectal adenocarcinoma cell proliferation.

<p>After DLD1 or SW620 cells were exposed to 10⁻¹² to 10⁻⁶M <i>p,p′</i>-DDE for 96 h, cell viability (A) and proliferation rate (B) were determined using MTT and cell number assays, respectively. Values are percent changes above the control (DMSO, 0.1%) as the mean ± SD of three independent experiments. *<i>p</i><0.05 and **<i>p</i><0.01 compared to control cells.