초록 close

We studied the antioxidative and immunoregulatory properties of 70% ethanol extracts from the leaves, branches, and fruit of 13 species of the Rhamnaceae collected during the bearing season (Berchemia berchemiifolia, Berchemia floribunda, Hovenia dulcis, Paliurus ramosissimus, Rhamnella franguloides, Rhamnus crenata, Rhamnus davurica, Rhamnus koraiensis, Rhamnus parvifolia, Rhamnus ussuriensis, Rhamnus yoshinoi, Sageretia thea, and Ziziphus ujube). Total phenolic and flavonoid content values were determined using calibration curves of gallic acid and rutin, respectively. ABTS and DPPH radical scavenging assays were performed to determine antioxidative potential. Anti-inflammatory effects were studied using the nitric oxide (NO) inhibition assay in LPS-induced RAW264.7 cells. Extracts of Berchemia berchemiifolia, Sageretia thea, and Ziziphus jujuba had the highest total phenol and flavonoid content values. Extracts of Berchemia berchemiifolia, Paliurus ramosissimus, Rhamnella franguloides, and Sageretia thea had the highest ABTS radical scavenging activities. Berchemia berchemiifolia and Sageretia thea had the highest DPPH radical scavenging activities. Furthermore, extracts of Berchemia berchemiifolia, Berchemia floribunda, Paliurus ramosissimus, Sageretia thea, and Ziziphus jujuba showed strong anti-inflammatory activity through inhibition of NO production. The results of this study suggest that Rhamnaceae extracts can be used as natural antioxidants and immunomodulators.