Comparison of cell viability between 3-NAntC and chemotherapy (doxorubicin and cisplatin). Cellular viability assays were performed on MDA-MB-231 (a–c) and HDFa (d–f) cell lines using the MTT method. Cells were treated with 3-NAntC, cisplatin, or doxorubicin for 24, 48, and 72 h at concentrations ranging from 0.2 to 2.0 µg/mL. Data are presented as mean ± SEM of at least three independent assays in triplicate. Significant differences between the control (0 µg/mL) and treated cells are designated as * p < 0.05, ** p < 0.01, *** p < 0.001, and **** p < 0.0001, according to two-way ANOVA and a Bonferroni post hoc test.
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