The inhibitory effect of non-steroidal anti-inflammatory drugs (NSAIDs) on the monophenolase and diphenolase activities of mushroom tyrosinase

• Published in: International journal of molecular sciences 2011-06, Vol.12 (6), p.3998-4008
• Main Authors: Sato, Kazuomi, Toriyama, Masaru
• Format: Article
• Language: English
• Subjects: Acids; Agaricales - enzymology; Anti-inflammatory agents; Anti-Inflammatory Agents, Non-Steroidal - chemistry; Anti-Inflammatory Agents, Non-Steroidal - metabolism; Aspirin; Basidiocarps; Catechol Oxidase - antagonists & inhibitors; Catechol Oxidase - metabolism; Cell cycle; diflunisal; Diflunisal - chemistry; Diflunisal - metabolism; diphenolase; Enzyme Inhibitors - chemistry; Enzyme Inhibitors - metabolism; Enzymes; Indomethacin; Indomethacin - chemistry; Indomethacin - metabolism; Inhibitory Concentration 50; Kinetics; Monophenol monooxygenase; Monophenol Monooxygenase - antagonists & inhibitors; Monophenol Monooxygenase - metabolism; monophenolase; Mushrooms; Nonsteroidal anti-inflammatory drugs; Nonsteroidal antiinflammatory drugs; NSAIDs (non-steroidal anti-inflammatory drugs); Oxidoreductases - antagonists & inhibitors; Oxidoreductases - metabolism; Protein Binding; tyrosinase
• ISSN: 1422-0067; 1661-6596; 1422-0067
• DOI: 10.3390/ijms12063998

In the present work, we investigated the effect of non-steroidal anti-inflammatory drugs (NSAIDs) on the monophenolase and diphenolase activity of mushroom tyrosinase. The results showed that diflunisal and indomethacin inhibited both monophenolase and diphenolase activity. For monophenolase activity, the lag time was extended in the presence of diflunisal. In the presence of indomethacin, the lag time did not change. IC(50) values of monophenolase activity were estimated to be 0.112 mM (diflunisal) and 1.78 mM (indomethacin). Kinetic studies of monophenolase activity revealed that both diflunisal and indomethacin were non-competitive inhibitors. For diphenolase activity, IC(50) values were estimated to be 0.197 mM (diflunisal) and 0.509 mM (indomethacin). Diflunisal and indomethacin were also found to be non-competitive diphenolase inhibitors.