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TiO2 NPs induced LDH release. H9c2 cells were treated with 20 μg/cm2 TiO2 NPs for 24, 48, and 72 h and then an LDH-based cytotoxicity assay was performed. Results are presented as mean ± standard deviation (SD) of three independent experiments (n = 3). * Significant difference between negative control (untreated) and treated cells (p < 0.05).
