Chemical composition and antioxidant, bactericidal, and matrix metalloproteinase inhibition activity of food-related plant

The present study aimed to investigate bio-function, focusing the on antioxidant, bactericidal, and matrix metalloproteinase (MMP) regulatory activity, of food-related plants. Bioassay-coupled chromatography and bioassay guiding, the rapid and simple screening method, was used to identify potential antioxidant and bactericidal components from fifty-five food-related plants. Lonicera japonica exhibited moderate xanthine oxidase (XO) inhibition and antioxidant activity. Rhodiola rosea, provoked strongly inhibition for tyrosinase, lipoxygenase (LOX), XO and MMP-2 activity. The organic fractions of Ligusticum sinense had a significant antimicrobial effect against two Gram-negative bacteria (Escherichia coli, Pseudomonas aeruginosa) and two Gram-positive species (Staphylococcus aureus, and Bacillus subtilis). The chemical structures of MMP-2-inhibiting and antimicrobial components was further identified as 1,2,3,4,6-penta-O-galloyl-β-D-glucopyranoside and ferulic acid, respectively, which were determined by ¹H and ¹³C nuclear magnetic resonance (NMR) and mass spectrometry (MS). The results suggest that R. rosea and L. sinense could be a useful natural food preservatives and potential nutraceutical ingredients.