Cytotoxicity of TH and OHT on MCF-7 and MCF-10A cells. MCF-7 (A) and MCF-10A (B) cells were treated with OHT (10 and 15 μM), TH (1% v/v) and their combination for up to 72 hr and cell death was determined using LDH assay. Each value represents the mean ± SD from three independent experiments. Statistical significance was determined by using the Student T test. Ψp < 0.05 for TH + OHT compared to TH; Ωp < 0.01 for TH + OHT compared to OHT; *p < 0.05, **p < 0.01 compared to untreated cells.