咖啡酸苯乙酯衍生物對化學性肝損傷小鼠的保護作用
發(fā)布時間:2019-06-17 17:31
【摘要】:背景與目的:咖啡酸苯乙酯(CAPE)是蜂膠中的一種主要活性組分,屬于多酚類化合物,是一種強抗氧化劑,有清除自由基的功效。在抗腫瘤、抗氧化、抗炎癥、免疫調節(jié)、缺血-再灌注保護等方面表現(xiàn)出獨特的生理藥理作用。許多報告及文獻已經(jīng)證實,CAPE藥理活性與鄰二酚羥基的存在有關。通過對CAPE進行修飾,得到咖啡酸苯乙酯的一種衍生物,即對硝基咖啡酸苯乙酯(CAPE-NO2)。因其也具有CAPE的必需活性基團,因此我們推測咖啡酸苯乙酯衍生物-對硝基咖啡酸苯乙酯也應具有CAPE相關的一些藥理活性。 本研究采用腹腔注射CCl4制備小鼠肝損傷模型,然后給予對硝基咖啡酸苯乙酯,觀察其對小鼠肝損傷模型的肝臟保護作用,并對其作用機制進行初步探討。旨在為CCl4引起的化學性肝損傷尋找一種新的治療物質。 方法:昆明小鼠隨機分為5組,每組10只。正常對照組:腹腔注射生理鹽水0.1ml/10g;模型對照組:腹腔注射生理鹽水0.1ml/10g;對硝基咖啡酸苯乙酯高、中、低劑量實驗組分別腹腔注射對硝基咖啡酸苯乙酯2.0mg/kg,1.0mg/kg,0.5mg/kg。連續(xù)15天后,正常組腹腔注射橄欖油溶液(0.1ml/10g),其余各組腹腔注射0.15%CCl4橄欖油溶液(0.1ml/10g)。禁食24h后眼眶采血,離心分離血清測定AST、ALT水平;處死小鼠,取肝臟稱重,計算肝臟指數(shù);取肝右葉制備10%肝勻漿,測定MDA、SOD、GSH-Px及其CAT活性。取肝左葉經(jīng)10%多聚甲醛固定,進行組織病理學檢查。 結果:(1)與模型組相比,CAPE-NO2各組均能明顯降低小鼠血清中AST、ALT的活性(P0.05),其降低程度呈劑量依賴性;(2)與模型組相比,,CAPE-NO2各組均能明顯降低小鼠肝組織中MDA的含量(P0.05),其降低程度呈劑量依賴性;(3)與模型組相比,CAPE-NO2各組均能明顯升高小鼠肝組織中SOD、CAT、GSH-Px的活性(P0.05),其升高程度呈劑量依賴性;(4)與模型組相比,CAPE-NO2各劑量組可顯著降低小鼠肝臟指數(shù)(P0.05);(5)與模型組相比,CAPE-NO2各劑量組肝細胞變性、壞死有不同程度的減輕,其中CAPE-NO2大劑量組肝細胞損傷相對較輕,以水變性為主,偶見壞死;(6)CAPE-NO2高、中劑量組小鼠肝細胞凋亡率與模型組相比明顯下降,差異有統(tǒng)計學意義(P0.01)。 結論:CAPE-NO2對小鼠化學性肝損傷具有保護作用,機制可能與其保護肝細胞膜、清除自由基、減輕脂質過氧化和抑制細胞凋亡有關。但其具體機制有待進一步深入研究。
[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
本文編號:2501148
[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
本文編號:2501148
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