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Doxorubicin up‐regulated expression of p53 and miR‐34c. Expression levels of miR‐34c were up‐regulated by doxorubicin in a dose‐ and time‐ dependent manner (a, b); (c and d), p53 was increased by Dox; however, c‐Myc was reduced by doxorubicin. *P < 0.05; **P < 0.01.
