纳豆粗提物抗兔高脂血症及抗氧化作用的研究

目的:观察纳豆粗提物对兔抗氧化及血脂水平的影响。方法: 用高脂饲料建立实验性高血脂症兔模型;18只日本大耳白兔随机分为3组,即正常对照组、模型组、纳豆粗提物组。结果: 模型建立第8 w时,纳豆粗提物组血清总胆固醇(total cholesterol, TC)、甘油三酯(triglyceride ,TG)、低密度脂蛋白胆固醇(low density lipoprotein cholesterol, LDL-C)、丙二醛(malon-dialdehyde, MDA)、动脉粥样硬化指数(atherogenic index,AI)分别比模型组降低了39.88%(P<0.05)、44.54%(P<0.05)、48.84%(P<0.05)、48.25%(P<0.01)、70.20%,而高密度脂蛋白胆固醇(high density lipoprotein cholesterol, HDL-C)、超氧化物歧化酶(superoxide dismutase, SOD)含量分别提高了75.81%(P<0.01)、38.32%(P<0.01),且病理组织切片表明,纳豆粗提物可有效阻止小叶周边肝细胞脂肪变性。结论:纳豆粗提物可降低血脂水平,通过升高HDL-C、降低LDL-C调节脂质代谢,具有抗脂质过氧化作用,在预防动脉粥样硬化的形成中起作用。

STUDY ON THE ANTIOXIDATIVE ACTIVITY AND EFFECTS ON EXPERIMENTAL HYPERLIPIDEMIA OF NATTO EXTRACT

Objective: To study the antioxidation and effects of water soluble extract from Natto on hyperlipidemia. Methods: The model of experimental hyperlipidemia was induced by high cholesterol diet. 18 rabbits were divided into 3 groups : model group, natto extract group and control group. Results: The natto extract could reduce the blood total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-C), malon-dialdehyde (MDA), atherogenic index (AI) of experimental rabbits 39.88% , 44.54% , 48.84%, 48.25% and 70.20%, respectively, and increase high density lipoprotein cholesterol (HDL-C), superoxide dismutase(SOD) 75.81% and 38.32%, respectively. Natto extract could prevent effectively the fatty degeneration of liver cells observed by pathological sections. Conclution: Natto extract can efficiently prevent the formation of experimental hyperlipidemia.