Melanin Biosynthesis Inhibitors from Wood of Artocarpus heterophyllus: The Effect of Isoprenoid Substituent of Flavone with 4-Substituted Resorcinol Moiety at B Ring

Author(s): Enos T. Arung, Kuniyoshi Shimizu, Hiroyuki Tanaka, Ryuichiro Kondo

Journal Name: Letters in Drug Design & Discovery

Volume 7 , Issue 8 , 2010

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In our efforts to find new whitening agent from natural resources, we focused on wood of Artocarpus heterophyllus which shows anti-melanogenesis activity. By activity-guided fractionation of A. heterophyllus wood extract, norartocarpetin (1) and artocarpesin (2) were isolated. These compounds have 4-substituted resorcinol moiety in B ring, which is an important substructure for revealing the tyrosinase inhibitory activity. Also, the effect of albanin A (3) which has 4-substituted resorcinol moiety at B ring with prenyl substituent at C-3 position, was examined for comparison. The IC50 values of mushroom tyrosinase inhibitory activity of norartocarpetin (1), artocarpesin (2) and albanin A (3) were 1.7, 8.5 and 463 μM, respectively. In melanin formation inhibition on B16 melanoma cells, the IC50 of these compounds (1-3) were 209.1, 45.1 and 40.1 μM, respectively. The roles of each substructure of flavones having 4-substituted resorcinol moiety with or without prenyl substituent on tyrosinase and melanin biosynthesis in B16 melanoma cells were discussed.

Keywords: Artocarpus heterophyllus, Tyrosinase, Melanin, 4-substituted resorcinol moiety, Prenyl substituents, B16 melanoma cells, Structure-activity relationship

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Article Details

Year: 2010
Published on: 01 March, 2012
Page: [602 - 605]
Pages: 4
DOI: 10.2174/157018010792062777
Price: $65

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