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Cytotoxicity of methanolic LE at different concentrations on three cell lines: Humanized rat basophils (HumRBL-2H3), human mast cells (LAD2), and bronchial epithelial cells (Calu-3). The cell viability was assayed using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) method after 72 h of treatment. DMSO was used as positive control. Data are expressed as a percentage (%) of control (C) and shown as the mean ± SEM of three independent experiments.
