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Cell viability (3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide [MTT] assay) of 3T3 mouse fibroblast cells and human lung fibroblast MRC-5 cells exposed to various gradient concentrations at 24, 48, and 72 hours’ exposure time. The data presented are means ± standard deviation of triplicate samples.
Abbreviations: PASA, para-amino salicylic acid; PASA-D, PASA by direct method; PASA-I, PASA by indirect method; ZLDH, zinc/aluminum-layered double hydroxide.
