灯盏花素的抗氧化作用及拮抗硒对大鼠肝脏毒性的研究

目的　探讨灯盏花素对人类允许的最高摄入量 (UL upperlimitofintake)硒所致毒性的拮抗作用。 方法　采用体外化学发光法测定灯盏花素清除亚硒酸钠 (Na2 SeO3)产生的活性氧自由基 (ROS)的能力、动物模型研究灯盏花素对大鼠肝脏丙二醛 (MDA)含量、抗氧化酶活性及组织病理学损伤的影响。结果　体外实验表明灯盏花素能有效清除由Na2 SeO3产生的ROS。动物实验中补UL硒及灯盏花素组大鼠肝脏MDA含量低于仅补UL硒组 ;超氧化物歧化酶(SOD)、过氧化氢酶 (CAT)、谷胱甘肽过氧化物酶 (GSH Px)活性高于仅补UL硒组 ;肝组织切片显示受损伤程度与仅补UL硒组相比减轻。结论　灯盏花素能有效拮抗UL硒所致的毒性 ,其机制与灯盏花素清除硒产生的ROS的作用有关

Antioxidant effect of scutellarin and its antagonistic action on the liver toxicity of Se in rats

AIM To explore the antagonistic effect of scutellarin on the liver toxicity of upper limit intake (UL) of Se. METHODS Chemical luminescence was used to determine the scavenging effect of scutellarin on reactive oxygen species (ROS) induced by Na 2SeO 3 in vitro . MDA content, the activities of SOD, CAT, GSH Px and histopathological sections were measured to investigate the effects of scutellarin on Se toxicity in rats. RESULTS In vitro experiment showed the ability of scutellarin to inhibit the generation of ROS effectively. MDA content was significantly decreased, the activities of SOD, CAT and GSH Px were significantly increased and liver injury was alleviated obviously in the UL Se plus scutellarin group as compared to the only UL Se group. CONCLUSION Scutellarin markedly antagonized the liver toxicity of UL Se through scavenging ROS induced by excess Se.