Abstract
In the work described on this paper, the interactions between eight flavonoids and hyaluronidase (HAase), an important enzyme involved in a promoting inflammation pathway, were investigated by spectroscopic and molecular modeling methods. The results revealed that all flavonoids could interact with HAase to form flavonoid-HAase complexes. The binding parameters obtained from the data at different temperatures indicated that flavonoids could spontaneously bind with HAase mainly through electrostatic forces and hydrophobic interactions with one binding site. According to synchronous and three-dimensional fluorescence spectra and the molecular docking results, all flavonoids bound directly into the enzyme cavity site and the binding of flavonoid into the enzyme cavity influenced the microenvironment of the HAase activity site which led to the reduced enzyme activity. The present study provides direct evidence at a molecular level to understand the mechanism of inhibitory effect of flavonoid against HAase and explain the anti-inflammatory mechanism of the Traditional Chinese Medicines as anti-inflammatory drugs.
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