Enhanced cell permeability of kojic acid–phenylalanine amide with metal complex
作者:Seon-Yeong Kwak、Jin-Mi Noh、So-Hee Park、Jang-Woong Byun、Hye-Ryung Choi、Kyoung-Chan Park、Yoon-Sik Lee
DOI:10.1016/j.bmcl.2009.11.069
日期:2010.1
Kojic acid–phenylalanine amide (KA–F–NH2), which showed an excellent tyrosinase inhibitory activity, did not inhibit melanogenesis in melanocyte due to its low cell permeability. To enhance its cell permeability by increasing lipophilicity, we prepared metal coordination compounds of KA–F–NH2 and characterized them by FT-IR and ICP analysis. The metalcomplex of KA–F–NH2 inhibited mushroom tyrosinase
Kojic acid–amino acid conjugates as tyrosinase inhibitors
作者:Jin-Mi Noh、Seon-Yeong Kwak、Hyo-Suk Seo、Joo-Hyun Seo、Byung-Gee Kim、Yoon-Sik Lee
DOI:10.1016/j.bmcl.2009.08.041
日期:2009.10
Kojic acid (KA), a well known tyrosinase inhibitor, has insufficient inhibitory activity and stability. We modified KA with amino acids and screened their tyrosinase inhibitory activity. Among them, kojic acid-phenylalanine amide (KA-F-NH2) showed the strongest inhibitory activity, which was maintained for over 3 months at 50 degrees C, and acted as a noncompetitive inhibitor as determined by kinetic analysis. It also exhibited dopachrome reducing activity. We also propose a new tyrosinase inhibition mechanism based on the docking simulation data. (C) 2009 Elsevier Ltd. All rights reserved.