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咖啡酸苯乙酯衍生物对化学性肝损伤小鼠的保护作用

发布时间:2019-06-17 17:31
【摘要】:背景与目的:咖啡酸苯乙酯(CAPE)是蜂胶中的一种主要活性组分,属于多酚类化合物,是一种强抗氧化剂,有清除自由基的功效。在抗肿瘤、抗氧化、抗炎症、免疫调节、缺血-再灌注保护等方面表现出独特的生理药理作用。许多报告及文献已经证实,CAPE药理活性与邻二酚羟基的存在有关。通过对CAPE进行修饰,得到咖啡酸苯乙酯的一种衍生物,即对硝基咖啡酸苯乙酯(CAPE-NO2)。因其也具有CAPE的必需活性基团,因此我们推测咖啡酸苯乙酯衍生物-对硝基咖啡酸苯乙酯也应具有CAPE相关的一些药理活性。 本研究采用腹腔注射CCl4制备小鼠肝损伤模型,然后给予对硝基咖啡酸苯乙酯,观察其对小鼠肝损伤模型的肝脏保护作用,并对其作用机制进行初步探讨。旨在为CCl4引起的化学性肝损伤寻找一种新的治疗物质。 方法:昆明小鼠随机分为5组,每组10只。正常对照组:腹腔注射生理盐水0.1ml/10g;模型对照组:腹腔注射生理盐水0.1ml/10g;对硝基咖啡酸苯乙酯高、中、低剂量实验组分别腹腔注射对硝基咖啡酸苯乙酯2.0mg/kg,1.0mg/kg,0.5mg/kg。连续15天后,正常组腹腔注射橄榄油溶液(0.1ml/10g),其余各组腹腔注射0.15%CCl4橄榄油溶液(0.1ml/10g)。禁食24h后眼眶采血,离心分离血清测定AST、ALT水平;处死小鼠,取肝脏称重,计算肝脏指数;取肝右叶制备10%肝匀浆,测定MDA、SOD、GSH-Px及其CAT活性。取肝左叶经10%多聚甲醛固定,进行组织病理学检查。 结果:(1)与模型组相比,CAPE-NO2各组均能明显降低小鼠血清中AST、ALT的活性(P0.05),其降低程度呈剂量依赖性;(2)与模型组相比,,CAPE-NO2各组均能明显降低小鼠肝组织中MDA的含量(P0.05),其降低程度呈剂量依赖性;(3)与模型组相比,CAPE-NO2各组均能明显升高小鼠肝组织中SOD、CAT、GSH-Px的活性(P0.05),其升高程度呈剂量依赖性;(4)与模型组相比,CAPE-NO2各剂量组可显著降低小鼠肝脏指数(P0.05);(5)与模型组相比,CAPE-NO2各剂量组肝细胞变性、坏死有不同程度的减轻,其中CAPE-NO2大剂量组肝细胞损伤相对较轻,以水变性为主,偶见坏死;(6)CAPE-NO2高、中剂量组小鼠肝细胞凋亡率与模型组相比明显下降,差异有统计学意义(P0.01)。 结论:CAPE-NO2对小鼠化学性肝损伤具有保护作用,机制可能与其保护肝细胞膜、清除自由基、减轻脂质过氧化和抑制细胞凋亡有关。但其具体机制有待进一步深入研究。
[Abstract]:Background & AIM: phenylethyl coffee acid (CAPE) is a main active component in propolis. It belongs to polyphenols and is a strong antioxidant, which has the effect of scavenging free radicals. It has unique physiological and pharmacological effects in anti-tumor, antioxidation, anti-inflammation, immunomodulation, ischemia-reperfusion protection and so on. Many reports and literatures have confirmed that the pharmacological activity of CAPE is related to the existence of o-diphenol hydroxyl groups. Phenylethyl p-nitrocoffee (CAPE-NO2), a derivative of phenylethyl coffee acid, was obtained by modifying CAPE. Because it also has the necessary active groups of CAPE, we speculate that phenylethyl p-nitrocoffee should also have some pharmacological activities related to CAPE. In this study, the mouse model of liver injury was established by intraabdominal injection of CCl4, and then phenylethyl p-nitrocoffee was given to observe the protective effect of phenylethyl nitrocoffee on the model of liver injury in mice, and the mechanism of action was discussed. The purpose of this study was to find a new therapeutic substance for chemical liver injury induced by CCl4. Methods: Kunming mice were randomly divided into 5 groups with 10 mice in each group. Normal control group: saline 0.1 ml 鈮

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