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MTT assay. (A) U87 MG cell viability at different concentrations of diosgenin depicting dose-dependent cytotoxic effect and IC50 value of 18.34 μM. (B) Effect of diosgenin and diosgenin incorporated solid lipid nanoparticles on U87 cell viability after 24 h showing both to be toxic on cells with p-value less than 0.001 compared with that of blank solid lipid nanoparticles. Results have been presented as mean ± SEM. *p < 0.05, **p < 0.01, ***p < 0.001.
