Studies on the Anti-lipid Peroxidative Actions of the Methanolic Extract of the Root of Aegle marmelos and Its Constituents In Vivo and In Vitro

The inhibitory effect of the methanolic extract of the root of Aegle marmelos (MERA) and its constituents on the lipid peroxidation in vivo and in vitro were studied. The results suggested that MERA increased the activities of superoxide dismutase (SOD) and GSH-peroxidase in the liver cytosol of mice, but showed no significant effect on the activity of catalase, and one of its major constituents, 4-methoxy-1-methyl-2-quinolone (MMQ) increased the activity of SOD in liver tissue of mice intoxicated with FeCl2-ascorbic acid (AA)-ADP in vivo. Various constituents isolated from the root of title plant inhibited the lipid peroxidation in rat liver homogenate, which was in vitro induced by FeCl2-ascorbic acid, CCl4-NADPH, or ADP- NADPH. Of the test compounds, MMQ and its derivatives integriquinolone were similar to (-tocopherol in inhibiting MDA production in rat liver microsomes induced by Fe2+-ascorbate, CCl4-NADPH, or ADP-NADPH.

玉米多糖的抗衰老作用

本试验探讨了玉米活性多糖的抗衰老作用。未配对的雌雄小鼠被随机分成五组:衰老模型组,正常对照组,低剂量组,中剂量组和高剂量组,除正常对照组外均为D-半乳糖致衰老模型小鼠。五周后将实验小鼠处死,取其血清,大脑,肝脏和肾脏分别测得超氧化物歧化酶(SOD)、谷光甘肽过氧化物酶(GSH-PX)、过氧化氢酶(CAT)的活性和丙二醛(MDA)等相关指标。结果表明:①从衰老模型组、空白组、低剂量组、中剂量组到高剂量组,SOD,GSH-PX和CAT活力均呈上升趋势,3个剂量组血清及各脏器中的SOD、GSH-PX活力与衰老模型组均存在显著性差异(P<0.05),量效关系呈正相关趋势;②各剂量组与衰老组相比血清和各脏器中的MDA含量均显著下降(P<0.05),且量效关系呈负相关趋势。而高剂量组小鼠的SOD、GSH-PX和CAT活力增加比其他各组更显著,MDA含量更低。所以,玉米多糖可以提高D-半乳糖致衰老小鼠的SOD、GSH-PX和CAT活性,降低MDA含量,从而具有抗衰老作用。