Effects of PFOS exposure on SH-SY5Y cells.

<p>Cells were treated with a series of concentrations of PFOS for 48 h followed by the MTT assay. (A) Cells were photographed under light microscopy, bar = 20 µm. (B) Cell viability of control and experimental groups. Data are expressed as mean ± SEM of four separate experiments. *<i>p</i><0.05, ** <i>p</i><0.01 and *** <i>p</i><0.001, compared to the control.