普洱熟茶茶多糖对ApoE—/—小鼠动脉粥样硬化的作用研究
2018-09-18张晓明王鹏罗绍忠杨继红侯艳邵宛芳徐湘婷
张晓明 王鹏 罗绍忠 杨继红 侯艳 邵宛芳 徐湘婷
【摘 要】 目的:探讨普洱熟茶提取物茶多糖对ApoE-/-小鼠高脂血症和动脉粥样硬化的作用。方法:24只ApoE-/-小鼠随机分为ApoE-/-对照组、茶多糖组、洛伐他汀组,另设8只相同遗传背景的C57BL/6J 小鼠为ApoE+/+对照组。4组分别给予蒸馏水、茶多糖、洛伐他汀、蒸馏水12周,实验结束后检测血清甘油三酯(TG)、总胆固醇(TC)、高密度脂蛋白胆固醇(HDL-C)和低密度脂蛋白胆固醇(LDL-C)的含量;ELISA检测血清白介素-6(IL-6)及脂联素(APN)的含量;光镜观测主动脉病理形态学变化。结果:与ApoE-/-对照组相比,茶多糖组体重明显减轻(P<0.05);TG、TC和LDL-C明显降低,HDL-C明显升高(P<0.05);血清IL-6水平降低,APN水平升高(P<0.05);光镜下主动脉损伤病变程度减轻。结论:普洱熟茶茶多糖有调节ApoE-/-小鼠血脂、保护血管内皮抗动脉粥样硬化的作用,作用机制可能与其抗炎作用有关。
【关键词】 ApoE-/-小鼠;动脉粥样硬化;茶多糖;白介素-6;脂联素
【中图分类号】R453 【文献标志码】 A 【文章编号】1007-8517(2018)08-0027-04
Abstract:Objective To explore the effect of tea polysaccharides(TPS) from fermented Puer tea on atherosclerosis (AS) in ApoE-/- mice.Methods ApoE-/- mice were divided into 3 groups (n=8): ApoE-/- control group, TPS group and lovastatin group. The mice of C57BL/ 6J were used as the ApoE+/+ control group(n=8). The 4 groups of mice were administered with distilled water,TPS or lovastatin for 12 weeks. Triglyceride (TG), total cholesterol(TC), high density lipoprotein cholesterol (HDL-C) and low density lipoprotein cholesterol (LDL-C) levels were assayed. The concertrations of IL-6 and APN in serum were measured by ELISA. Pathomorphology changes of aortas were observated. Results The comparison between TPS group and ApoE-/- control group revealed that: Bodyweights were reduced obviously in TPS group(P<0.05). Serum levels of TG,TC and LDL-C were decreased significantly in TPS group(P<0.05).The contents of IL-6 were lowered markedly, and the level of APN increased obviously in TPS group(P<0.05). The aortas pathological changes were relieved obviously in TPS group. Conclusions TPS from fermented Puer tea can regulate blood lipid levels and bodyweights of ApoE-/- mice.TPS can protect vascular endothelial cells to inhibit the development of atherosclerosis, and this mechanism may be related with anti-inflammation.
Keywords:ApoE-/- Mice; Atherosclerosis; Tea Polysaccharides; IL-6; APN
動脉粥样硬化(Atherosclerosis,AS)是心血管疾病的主要病理基础,是与血脂代谢异常、内皮受损、平滑肌细胞增殖和血栓形成等有关的慢性炎症性疾病[1-2]。随着生活水平的提高和人口老龄化的日益严重,AS 的发病率越来越高,成为了世界范围内导致死亡的主要原因。研究显示,异常的脂质代谢和慢性炎症在AS 的发生发展中起着重要的作用。适当调整血脂水平能有效地降低动脉粥样硬化发病率[3-4]。临床上大多数降低血胆固醇水平的方法,需要严格控制饮食并依赖于药物,而降血脂药物的副作用使其应用受到了一定程度的限制。因此开发能够明显调节血脂的功能食品,对降低动脉粥样硬化的发病率具有重要的意义。普洱茶是云南特有的地理标志产品,是以符合普洱茶产地环境条件的云南大叶种晒青茶为原料,按特定的加工工艺生产的具有独特品质特征的茶叶。……
