Selectivity of Dietary Phenolics for Inhibition of Human Monoamine Oxidases A and B

Figure 5

Determination of IC₅₀ for curcumin, guaiacol, isoeugenol, pterostilbene, and resveratrol on MAO-B activity. MAO-B activity was measured by the formation of 4-hydroxyquinoline with inhibitors in a broad range of concentrations (at least 10⁴-fold) for 15 min. The Y axis is expressed as fraction of the control (in absence of inhibitor) and all points on the curves are expressed as means ± SD.