Reference - Detail
|Author||Morimura K, Hiramatsu K, Yamazaki C, Hattori Y, Makabe H, Hirota M.|
|Title||Daedalin A, a metabolite of Daedalea dickinsii, inhibits melanin synthesis in an in vitro human skin model.|
|Journal||Biosci Biotechnol Biochem|
The culture broth of Daedalea dickinsii was found to predominantly contain the tyrosinase inhibitor, (2R)-6-hydroxy-2-hydroxymethyl-2-methyl-2H-chromene, daedalin A (1). Ongoing research into bioactive metabolites resulted in the identification of two new 2H-chromenes, 6-hydroxy-5,7-dimethoxy-2,2-dimethyl-2H-chromene (3) and 6-hydroxy-2-hydroxymethyl-5-methoxy-2-methyl-2H-chromene (4), together with 6-hydroxy-2,2-dimethyl-2H-chromene (2). Comparative studies of isolated compounds 1-4 and related compounds (+/-)-1 and 1a-1c showed 1 to have the strongest tyrosinase inhibitory activity. These results suggest that the hydroxyl groups at positions 6 and 9 of 1 were important for the potent activity. A Lineweaver-Burk plot for a kinetic analysis indicates that 1 competed with L-tyrosine for tyrosinase. Compound 1 also suppressed melanogenesis in a human skin model (up to 49% at 2.8 micromol/tissue application) without affecting the cell viability. Compounds 1, 1b and 1c also showed 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity comparable to that of alpha-tocopherol.
|MeSH||Benzopyrans / chemistry Benzopyrans / isolation & purification Benzopyrans / metabolism* Benzopyrans / pharmacology* Biphenyl Compounds / metabolism Coriolaceae / metabolism* Free Radical Scavengers / chemistry Free Radical Scavengers / isolation & purification Free Radical Scavengers / metabolism Free Radical Scavengers / pharmacology Humans Melanins / biosynthesis* Monophenol Monooxygenase / antagonists & inhibitors Picrates / metabolism Skin / drug effects* Skin / metabolism*|
|WOS Category||FOOD SCIENCE & TECHNOLOGY CHEMISTRY, APPLIED BIOTECHNOLOGY & APPLIED MICROBIOLOGY BIOCHEMISTRY & MOLECULAR BIOLOGY|
|General Microbes||JCM 12697|