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  • Title: Inhibitory effects of sanguinarine on monoamine oxidase activity in mouse brain.
    Author: Lee SS, Kai M, Lee MK.
    Journal: Phytother Res; 2001 Mar; 15(2):167-9. PubMed ID: 11268121.
    Abstract:
    The effects of benzophenanthridine alkaloids, such as sanguinarine and chelidonine, on monoamine -oxidase (MAO) activity in mouse brain were investigated. Sanguinarine showed an inhibitory effect on MAO activity in a concentration dependent manner (53.4% inhibition at 25 microM). However, chelidonine did not inhibit MAO activity. The IC(50) value of sanguinarine was 24.5 microM. Sanguinarine inhibited non-competitively MAO activity using kynuramine as a substrate. The K(i) value for sanguinarine was 22.1 microM. These results suggest that sanguinarine partially contributes to the regulation of catecholamine content.
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