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Influence of the hormone precursors DHEA and E1 on MDA-MB-231 and MCF-7 cell proliferation. MDA-MB-231 cells were incubated with increasing concentrations (0–100 nM) of (A) DHEA or (B) E1 for 48 h. MCF-7 cells were incubated with increasing concentrations (0–100 nM) of (C) DHEA or (D) E1 for 48 h. All data represent the means ± SD of three independent biological replicates.∗P < 0.05 vs. untreated control samples.
