瓜蒌薤白半夏汤对ApoE小鼠血脂代谢、氧化应激和主动脉Lox-1表达的影响

观察瓜蒌薤白半夏汤(GXBD)在调节血脂代谢、抗氧化、干预ox-LDL/Lox-1通路的作用,探讨其抗动脉粥样硬化(AS)的作用机制。以高脂饲料饲喂雄性Apo-E-/-小鼠42只,建立AS模型。AS模型小鼠随机分为模型组、辛伐他汀组、GXBD高、低剂量组,以C57BL/6J雄性小鼠作为正常对照组;每组10只,连续灌胃给药8周。末次给药后24 h,检测血清TC,TG,LDL-C,HDL-C及SOD,MDA,GSH-px,ox-LDL水平;HE染色观察主动脉组织结构变化,Western blot和PCR分别检测主动脉Lox-1蛋白表达和mRNA水平。结果显示模型组小鼠血脂指标含量及血清MDA,ox-LDL水平显著高于正常对照组,SOD,GSH-px显著低于正常对照组,主动脉Lox-1蛋白表达水平及其mRNA水平显著高于正常对照组(P0.05),模型组主动脉出现明显粥样硬化斑块;GXBD高、低剂量组和辛伐他汀组小鼠血脂指标含量及MDA,ox-LDL水平显著低于模型组,SOD,GSHpx显著高于模型组,主动脉Lox-1蛋白表达水平及其mRNA水平显著低于模型组(P0.05),主动脉组织粥样硬化病变明显减轻。说明调节血脂代谢,抗氧化、抑制Lox-1的表达、干预ox-LDL/Lox-1通路,可能是其抗AS的机制之一。

Effects of Gualou Xiebai Banxia decoction on blood lipid content, oxidative stress and ox-LDL/Lox-1 pathway in ApoE-/- mice

To observe the functions of Gualou Xiebai Banxia decoction(GXBD) on regulating lipid metabolism, anti-oxidation, and interposing ox-LDL/Lox-1 pathway, and to explore its anti-atherosclerosis (AS) mechanisms. AS models were established by using 42 Apo-E^-/- male mice with high fat diet. AS model mice were randomly divided into the model group, simvastatin group, and GXBD high and low dose groups. C57BL/6J male mice were used as the normal control group, n=10 and the treatment lasted for 8 weeks. The levels of TC, TG, LDL-C, HDL-C, SOD, MDA, GSH-px, and ox-LDL in blood serum were tested 24 h after the last administration. The changes of aortic tissues structure were observed by HE staining; the expression levels of Lox-1 protein and the expression levels of mRNA were detected by Western blot and PCR respectively.Results showed that the blood lipid levels and MDA, ox-LDL levels in blood serum of model group were significantly higher than those in the normal control group, but SOD, GSH-px levels were significantly lower than those in the normal control group, and the Lox-1 protein and mRNA expression levels were also significantly higher than those in the control group(P<0.05), namely aortic atherosclerosis lesions were obvious in model group.The levels of blood lipid and MDA, ox-LDL of GXBD high and low dose groups and simvastatin group were significantly lower than those in model group, while SOD, GSH-px levels were significantly higher than those in model group, and Lox-1 protein and mRNA expression levels were significantly lower than those in model group(P<0.05), namely the aortic atherosclerosis lesions were significantly relieved. The above results indicated that GXBD was capable of modulating blood lipid, anti-oxidation, and inhibiting the expression of Lox-1, and interposing ox-LDL/Lox-1 pathway in the AS model Apo-E^-/- mice, which may be one of the mechanisms of anti-atherosclerosis.