Combination effect of SAHA and paclitaxel on ovarian cancer cells. Four hours after treatment with SAHA, OVCAR-3 and SK-OV-3 cells were exposed to paclitaxel for further 72 hours. Cytotoxic effects were assessed by Alamar Blue assay. Cell viabilities are expressed as the ratio of absorbance of treated to untreated cells. Means ± SD of 3 independent experiments in quadruplicates are shown.