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Triptolide-induced morphological changes of U266 cells stained with Hoechst 33258 ×400. (A) Untreated U266 cells. (B) Cells treated with 40 nmol/L triptolide for 24 h. (C) Cells treated with 80 nmol/L triptolide for 24 h. (D) Cells treated with 160 nmol/L triptolide for 24 h.
