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Effect of QTL on the growth of SW620 cells. (A) Cell viability. The cells were treated with different concentrations of QTL (12.5–400 µg/ml), which affected cell viability in a time-dependent manner (24, 48 and 96 h, respectively). Data are expressed as the means ± SD (n=6). (B) Morphological changes. The cells were treated with 50, 100 and 200 µg/ml of QTL. After 48 h, the images were captured by light microscopy (magnification, ×200). QTL, quercetrin from T. sinensis leaves.
