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Figure 1: The effect of Portulaca oleracea and its constituent alpha-linoleic acid on nitric oxide concentration in (a) nonstimulated and (b) phytohemagglutinin-A-stimulated, cultured human lymphocytes, in control group (C), dexamethasone (D), three concentrations of the extract (10, 40, and 160 μg/ml corresponding to P10, P40, and P160), and alpha-linoleic acid (5, 15, and 45 μg/ml corresponding to ALA5, ALA15, and ALA45) treated groups (for each group, n = 6). Data are presented as mean ± standard error of the mean **P < 0.01, ***P < 0.001 compared to Group C. +P < 0.05 compared to dexamethasone-treated group. Statistical analyses were performed using one-way analysis of variance with Tukey–Kramer post hoc test

Figure 1: The effect of <i>Portulaca oleracea</i> and its constituent alpha-linoleic acid on nitric oxide concentration in (a) nonstimulated and (b) phytohemagglutinin-A-stimulated, cultured human lymphocytes, in control group (C), dexamethasone (D), three concentrations of the extract (10, 40, and 160 μg/ml corresponding to P10, P40, and P160), and alpha-linoleic acid (5, 15, and 45 μg/ml corresponding to ALA5, ALA15, and ALA45) treated groups (for each group, <i>n</i> = 6). Data are presented as mean ± standard error of the mean **<i>P</i> < 0.01, ***<i>P</i> < 0.001 compared to Group C. <sup>+</sup><i>P</i> < 0.05 compared to dexamethasone-treated group. Statistical analyses were performed using one-way analysis of variance with Tukey–Kramer <i>post hoc</i> test