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a Cytotoxicity of curcumin formulations after incubation for 24 h. Data represent the mean ± SD (n = 6). *p < 0.05, compared with the free Cur. b Cytotoxicity of Cur-loaded micelles with different concentrations of Cur (0.5, 1.25, 2.5, 5, 10, 20, and 40 μg/mL). The IC50 values of free Cur, Cur/oHA-Cur micelles, and Cur-TPP-oHA-SS-Cur micelles were 6.534, 5.092, and 3.871 μg/mL, respectively
