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MTT growth assays in MCF-10A cells untreated (control, C) or treated with doses of NB, MC, and MNA at IC50 for 24 h. Cell proliferation is expressed as fold change ± S.D. relative to vehicle-treated cells and is representative of three different experiments, each performed in triplicate. Statistical comparison was drawn between groups using a two-sample two-tailed t-test.
