Abstract
A 50% ethanolic extract (MCS-ext) from seeds of Morinda citrifolia (“noni” seeds) showed more potent in vitro inhibition of elastase and tyrosinase, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity than extracts of M. citrifolia leaves or flesh. Activity-guided fractionation of MCS-ext using in vitro assays led to the isolation of ursolic acid as an active constituent of elastase inhibitory activity. 3,3′-Bisdemethylpinoresinol, americanin A, and quercetin were isolated as active constituents having both tyrosinase inhibitory and radical scavenging activities. Americanin A and quercetin also showed superoxide dismutase (SOD)-like activity. These active compounds were isolated from noni seeds for the first time.
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This work was supported financially by “Antiaging Center Project” for Private Universities from Ministry of Education, Culture, Sports, Science and Technology, 2008–2012.
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Masuda, M., Murata, K., Fukuhama, A. et al. Inhibitory effects of constituents of Morinda citrifolia seeds on elastase and tyrosinase. J Nat Med 63, 267–273 (2009). https://doi.org/10.1007/s11418-009-0328-6
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DOI: https://doi.org/10.1007/s11418-009-0328-6