The functional property of egg yolk phosvitin as a melanogenesis inhibitor

Phosvitin is a phosphoglycoprotein present in egg yolk. More than half of the amino acids in phosvitin molecule are serine, of which >90% are phosphorylated. Therefore, phosvitin has a strong metal binding capability. The aim of this study was to investigate the effect of phosvitin on the inhibition of melanogenesis in melanoma cells. The results showed that phosvitin inhibited the activity of mushroom tyrosinase. Addition of phosvitin at a concentration of 50 mu g/ml, to B16F10 melanoma cells inhibited tyrosinase activity by approximately 42% and melanin synthesis by 17% compared to those in a control without phosvitin. Phosvitin inhibited the expression of tyrosinase, tyrosinase-related protein 1 (TRP-1), TRP-2, and microphthalmia-associated transcription factor (MITF) in B16F10 melanoma cells. In addition, phosvitin reduced the cellular cAMP concentration in B16F10 melanoma cells. These results indicate that phosvitin has the potential to be used as a melanogenesis inhibitor in the food and cosmetics industry. (C) 2012 Elsevier Ltd. All rights reserved.