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In vitro cytotoxicity analysis. Viabilities of HepG2 (A), SMMC7721 (B), and NIH 3T3 (C) cells incubated with MSNs and Lac-MSNs for 72 h, and the viabilities of HepG2 (D) and SMMC7721 (E) cells treated with varying concentrations of DTX contained in MSNs and Lac-MSNs for 24 h (1), 48 h (2), and 72 h (3), respectively, at 37°C. Data represent mean ± SD (n = 6).
