Abstract
This study describes the preliminary evaluation of antioxidant and anti-inflammatory activities of Allium hookeri. A. hookeri was extracted using crude extract and then fractionated sequentially with n-hexane, CH 2 Cl 2 , EtOAc, and n-BuOH. To screen for antioxidant and anti-inflammatory agents effectively, we first examined the inhibitory effect of A. hookeri extracts on production of oxidant stresses (2,2-diphenyl-1-picrylhydrazyl, xanthine oxidase, and superoxide). In addition, we examined the inhibitory effects of A. hookeri on production of pro-inflammatory factors (nitric oxide, prostaglandin E 2 , inducible nitric oxide synthase, and cyclooxygenase-2) in murine macrophage RAW 264.7 cells stimulated with lipopolysaccharide. Of the sequential solvent fractions of A. hookeri, EtOAc fractions showed decreased production of oxidant stresses, and CH 2 Cl 2 and EtOAc fractions of A. hookeri inhibited production of pro-inflammatory factors. EtOAc fraction inhibited production of pro-inflammatory cytokines (interleukin-6 and -1β). These results suggest that A. hookeri has significant effects on oxidant stresses and pro-inflammatory factors and is a possible antioxidant and anti-inflammatory therapeutic and preventive material.
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