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Antidepressant Effects of Noni Fruit and its Active Principals

並列摘要


The antidepressant effects of "Morinda citrifolia" (noni) fruit extracts were investigated "in vitro" with the Monoamine Oxidase (MAO) A and B bioassays. The ethyl acetate extract of freeze-dried noni fruit powder inhibited MAO-A and B enzymes 78 and 49%, respectively. A phytochemical study of the most active extract led to the isolation of nine compounds. Among these, three principles including two flavonoids, kaempferol and quercetin, as well as one lignan, (+)-3, 4, 3', 4'-tetrahydro-9, 7'α-epoxylignan-7α, 9'-lactone, were found to be potent MAO-A and B inhibitors. These findings indicate that noni fruit is a natural MAO-A and MAO-B inhibitor, involving a synergistic effect from multiple active components.

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