Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (35): 79-83.doi: 10.11924/j.issn.1000-6850.casb15070068

Special Issue: 生物技术 园艺

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Inhibitory Effect of the Methanol Extracts from Ishige okamurai Yendo on Tyrosinase

  

  • Received:2015-07-12 Revised:2015-09-28 Accepted:2015-10-20 Online:2015-12-18 Published:2015-12-18

Abstract: To study the inhibitory effect of the extract from Ishige okamurai Yendo on tyrosinase, inhibition ratio of the methanol extracts from Ishige okamurai on the activity of tyrosinase was researched by the method of oxidation rate of L- DOPA, and its inhibition kinetic type was inferred by enzymatic dynamic test and Lineweaver-Burk curve method. The content of total phenols, polysaccharide and flavonoids was determined by Folin-Ciocalteu method, phenol-sulfuric acid method and AlCl3 color-developing method, respectively. The results showed that the methanol extracts from Ishige okamurai could obviously inhibited activity of tyrosinase with IC50 being 1.823 g/L. The inhibition kinetic characteristics were in accord with the noncompetitive inhibition. Chemical analysis showed that the methanol extracts had high content of total phenol, polysaccharides and flavonoids, which was (51.37 ± 2.77), (35.92 ± 5.27), (43.16 ± 0.33) mg/g, respectively.

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