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Overexpression of H19 enhances breast cancer resistance to Dox. (a) The IC50 values of MCF-7/Dox cells were higher than that of their parental MCF-7 cells. (b) qRT-PCR analysis of relative H19 expression in MCF-7/Dox cells and MCF-7 cells; (c), qRT-PCR analysis of relative PARP1 expression in MCF-7/Dox cells and MCF-7 cells. *P < 0.01
