Evaluation of the Antioxidant Potential and ldentification of Active Principles of Solanum nigrum L. on Antioxidant Defense Systems

까마중내 (Solanum nigrum L.) 항산화방어계의 항산화력 및 물질의 동정

Enzymes and non-enzymatic antioxidants are involved in defense of oxgen free radical intermediates in all aerobic cells. The non -enzymatic antioxidants and antioxidant enzyme from the extracts of Solanum nigrum L. known to be anticancer medicinal plant were examined in other to utilize the discovery in natural products as cancer chem-opereventive agents. The DPPH(1,1-diphenyl-2-picryl-hydrazyl) free radical scavening activity on plant position of Solanum nigrum L. was the highest in root, with stem, whole plant, seed, leaf and flower, at higher activities respectively. In extraction methods, the DPPH free radical scavenging activity by circulating extraction with 80 % MeOH. The DPPH activity of L6 fraction by LH-20 column chromatography showed about 6.7 times higher than that of ethyl acetate-fraction. These were identified as phenolic compounds such as 2-6-methano-3-benzazocin-11-ol, 2[1H]-phyidinethione and 2-hydroxy -5-methyl-benzaldehyde. Peroxidase(POD) and superoxide dismutase(SOD) activities of stem and root were higher than that of other plant positions and those of plant positions according to growing stage were the highest in 60 days after seeding. The numbers of isozyme pattern of POD and SOD showed 10 hands and 5 bands, respectively, especially, 8 bands of POD and 3 bands of SOC showed a difference according to plant positions.

까마중의 부위별 DPPH free radical 소거활성은 뿌리에서 가장 높았고, 줄기, 전부위, 열매 잎 그리고 꽃 순으로 높았다. 추출방법간의 DPPH free radical 소거활성은 80%methanol에 침지하여 추출한것보다는 $80^{\circ}C$에서 80% meth-anol에 흰류추출한것이 높았다. Sephades LH-20 column chromatography에 의하여 분획된 L6의 DPPH free radical 소거활성은 ethy acetate 분획 추출물보다 6.7배 높았다. 분획물내의주요물질은 2, 6-methano-3-benzazocin-11-ol, 2[1h]-pyridinethione 및 2-hydroxy-5 methylbenzaldehyde로 phenolic 화 물이었다. 줄기와 뿌리의 POD및 SOD 활성은 타 부위에 비하여 높은 활성을 나타내었고, 생육기간에는 파종 후 60일후에서 활성이 가장 높았다. PODdmlehddnl gth 패턴은 뿌리에서 10개의 band로 가장 많았고 그중 8개의 band가 식물체의 부위별로 차이가 있어Tdmaul, SOD의 동위효소 패턴은 잎에 5개의 band로 가장 많았고 그중 2개의 band가 식물체의 부위별로 차이가 있었다.이가 있었다.