Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (12): 3579.doi: 10.7503/cjcu20210527

• Inorganic Chemistry • Previous Articles     Next Articles

Inhibitory Effect of Four Kinds of Keegin-type Phosphomolybdate on Tyrosinase and Melanin Formation and Its Antioxidant Activities

SHUAI Die1, ZHAO Meijuan1, CHEN Bingnian2, WANG Li1()   

  1. 1.College of Food and Biological Engineering,Jimei University,Xiamen 361021,China
    2.Xiamen University Hospital,Xiamen 361005,China
  • Received:2021-07-21 Online:2021-12-10 Published:2021-09-22
  • Contact: WANG Li E-mail:wanglimerry@jmu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21871110);the Natural Science Foundation of Fujian Province, China(2020J01674)

Abstract:

Four kinds of transition metal V substituted Keggin type phosphomolybdate Na3+nPMo12-nVnO40 (abbreviated as PMo12-nVn)(n=2, 3, 4, 5) were synthesized and characterized. The kinetic enzymatic method suggested that the inhibition type of four compounds on tyrosinase was reversible mixed inhibition, and the number of transition metal vanadium substitution would affect the inhibition effect of tyrosinase. When the enzyme content was 500 U/mL, the inhibition rates of PMo10V2, PMo9V3, PMo8V4 and PMo7V5 on tyrosinase were (7.046±0.506), (12.128±0.574), (12.362±0.802), (9.860±1.490) mmol/L, respectively. The molecular docking experiment confirmed that there was hydrogen bond and van der Waals force interaction between the compound and tyrosinase. The four compounds did not produce cytotoxic effects on B16 melanoma cells, and could significantly inhibit the production of melanin. In addition, 1,1-diphenyl-2-picrylhydrazyl radical 2,2-diphenyl-1-(2,4,6-trinitrophenyl)hydrazyl(DPPH) and 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate)(ABTS) free radical scavenging experiments confirmed that polyoxometalates had good antioxidant capacity. What’s more, they have stronger DPPH radical scavenging ability.

Key words: Polyoxometalate, Tyrosinase, Enzyme kinetics, Molecular docking, Melanin, Antioxidant

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