Jingwen Chen, Eun Na and Sun Young Lim*
Aim and Objective: We investigated the inhibitory effects of fractions from Lycopus lucidus Turcz. leaves on genomic DNA oxidation, nitric oxide (NO) production and matrix metalloproteinase (MMP) activity.
Material and Methods: Oxidative damage of genomic DNA was detected after Fenton reaction with H2O2 using DNA electrophoresis. Western blotting was performed to compare the expression levels of MMP-2 in phorbol 12-myristate 13-acetate (PMA)-induced HT-1080 cells. Lipopolysacchride (LPS)-induced NO production in RAW 264.7 cells was measured using Griess reagent.
Results: All fractions (n-Hexane, 85% aq. MeOH, n-BuOH, and water fractions) from the leaves of L. lucidus Turcz. significantly inhibited intracellular production of reactive oxygen species (ROS) (p<0.05). Particularly, 85% aq. MeOH and n-BuOH fractions showed higher ROS inhibitory activity than the other fractions. n-Hexane, 85% aq. MeOH, n-BuOH and water (0.05 mg/mL) fractions significantly inhibited oxidative DNA damage by 57.97%, 68.48%, 58.97%, and 68.39%, respectively (p <0.05). Treatment of RAW 264.7 cells with each fraction reduced LPS-induced NO production in a dose-dependent manner (p<0.05). n-Hexane and 85% aq. MeOH fractions notably reduced MMP-2 secretion levels of in the culture supernatants from HT-1080 cells.
Conclusion: Overall, these results indicated that L. lucidus Turcz. leaves can be exploited as plant based sources of antioxidants in the pharmaceutical, cosmetic, nutraceutical and food industries.
Lycopus lucidus Turcz., DNA oxidation, antioxidant, matrix metalloproteinase, reactive oxygen species (ROS)
Division of Convergence on Marine Science, Korea Maritime & Ocean University, Busan, Ocean Science and Technology School, Korea Maritime & Ocean University, Busan, Division of Convergence on Marine Science, Korea Maritime & Ocean University, Busan