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Effects of PEA treatment on the viability of chemoresistant YD-9 cells. (A) After 24 h incubation with etoposide (2 - 10 µg/mL) and (B) 5-FU (1 - 2,000 µM), cell viabilities were determined by MTT assay. YD-9 cell line showed resistance to etoposide and 5-FU, (C) whereas PEA significantly decreased the proliferation of YD-9 cells. Four independent assays were performed and data shown are the mean ± SD of the means obtained from triplicates of each assay.
