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Effect of a crude extract of V. rugosum on Neuro2a cells (a), undifferentiated Caco-2 cells (b), and KB cells (c). Different exposure times were evaluated for the crude extract: 24 h for Neuro2A, 24 and 48 h for undifferentiated Caco-2 and 24, 48 and 72 h for KB cells. Data presented (mean ± SEM) were obtained from two independent experiments (duplicate wells per experiment for Neuro2A and Caco-2, triplicate wells per experiment for KB cells).
