黄连对正常小鼠红细胞的影响及其抗氧化属性研究

目的:观察黄连对正常小鼠红细胞溶血、红细胞抗氧化系统及其功能的影响,同时评价黄连和小檗碱的氧化还原属性.方法:整体动物实验:正常小鼠灌服黄连1.2 g·kg-1,3d后取血,分别测定血浆游离血红蛋白、血清间接胆红素含量和外周血网织红细胞数量,红细胞膜葡萄糖六磷酸脱氢酶( G6PD)、超氧化物歧化酶(SOD)的活性、全血抗氧化能力(T-AOC)及红细胞膜谷胱甘肽(GSH)、丙二醛(MDA)的含量,检测红细胞膜Na+-K+-ATP酶,Ca2+ -Mg2+-ATP酶的活性,并观察其对红细胞流动性和变形性的影响;电生化实验采用循环伏安法测定黄连和小檗碱在玻璃碳电极上的伏安行为;体外红细胞实验观察黄连对正常小鼠红细胞自氧化溶血率的影响.结果:口服1.2g·kg-1黄连对正常小鼠的血浆游离血红蛋白、血清间接胆红素、外周血网织红细胞的计数均无明显影响,对红细胞膜SOD,G6PD和全血T-AOC的活性及红细胞膜MDA,GSH无明显改变,也不影响红细胞膜Na+ -K+ -ATP酶,Ca2+ -Mg2+ -ATP酶活性,同时对红细胞流动性及变形性亦无明显影响;黄连分别在-0.27 V和0.60V有2个氧化峰,小檗碱在0.56V处有1个氧化峰,回扫时二者均无还原峰;0.125 ～2 g·L-1黄连体外可以明显抑制小鼠红细胞的自氧化溶血.结论:正常剂量的黄连不能引起正常小鼠红细胞溶血,也不影响红细胞膜抗氧化系统及其功能,黄连具有抗氧化(还原)属性.

Study on effect of Coptidis Rhizoma on red blood cells of normal mice and its antioxidant property

Objective: To observe the effect of Coptidis Rhizoma(CR) on hemolysis and antioxidant system of normal mice and its impact on the functions, while evaluating the oxidation reduction property of CR and berberine.Method: In the whole animal experiment, normal mice were orally administered with CR at the dose of 1.2 g·kg^-1 for three days. Their blood were collected to detect the hemoglobin in plasma, the content of serum bilirubin, the number of peripheral blood reticulocytes, the T-AOC in whole blood, measure the contents of glucose-6-phosphated- ehydrogenase (G6PD), superoxide dismutase (SOD), glutathione (GSH) and malondialdehyde (MDA) of RBC membrane, determine the activity of Na⁺-K⁺-ATPase, Ca²⁺-Mg²⁺-ATPase, fluidity, and observe its impact on the liquidity and deformability of RBCs. According to the electrical and biochemical experiment, the voltammetric behaviors of CR and berberine on glassy carbon electrode were evaluated using cyclic voltammetry. In the RBC in vitro experiment, the impact of Coptidis Rhizoma on autoxidation hemolysis rate of RBCs of normal mice was observed.Result: There was no significant effect on hemoglobin, serum bilirubin, and reticulocyte count in normal mice administrated with CR at the dose of 1.2 g·kg^-1, and so is on RBC membrane SOD, G6PD, MDA, GSH and whole blood T-AOC activity. In addition, CR had also no significant effect on Na⁺-K⁺-ATPase, Ca²⁺-Mg²⁺-ATPase activity, and no notable impact on the fluidity and deformability of RBCs. There were two oxidation peaks at-0.27 V and 0.60 V induced by CR and one oxidation peak induced by berberine at 0.56 V, with no reduction peak at fly-back. CR could significantly inhibit oxidative hemolysis in RBCs at the dose of 0.125-2 g·L^-1 in vitro.Conclusion: The normal dose of Coptidis Rhizoma can not cause hemolysis of RBC, and also can not change antioxidant system and functions of RBC, CR and berberine show antioxidant (reducing) properties.