张媛媛,宋理平,郭辉,王晓丽

• 1:山东省淡水渔业研究院
• 2:山东大学齐鲁儿童医院

摘要(Abstract)：

【目的】研究姜黄素对四氯化碳诱导的鲤(Cyprinus carpio)肝脏损伤的修复作用,为筛选治疗鱼类肝脏综合征的绿色药物提供理论依据。【方法】在基础饲料中分别添加0、60、120、240 mg/kg姜黄素,制备4种等氮、等能饲料。试验设5组,阴性对照组注射橄榄油,饲喂基础饲料,阳性对照组和各姜黄素组注射体积分数15%的CCl_4溶液,分别以添加0、60、120、240 mg/kg姜黄素饲料饲喂14 d,测定各组谷丙转氨酶(GPT)、谷草转氨酶(GOT)活力,丙二醛(MDA)含量,血浆总蛋白(TP)含量,总能氧化能力(T-AOC),肝脏超氧化物歧化酶(SOD)、谷胱甘肽(GSH)、谷胱甘肽过氧化物酶(GSH-Px)活力,以及肝细胞核相关转录因子2(Nrf2)含量等指标,并对各组肝脏细胞进行组织学观察,研究姜黄素对鲤肝损伤的修复作用。【结果】在四氯化碳诱导初期,阳性对照组,60、120、240 mg/kg姜黄素组的GPT、GOT活力和MDA含量显著高于阴性对照组(P <0.05),随着投喂时间的增加,各姜黄素组GPT、GOT活力和MDA含量平均值均有不同程度的降低,其中,120 mg/kg组的GPT、GOT活力和MDA含量以及240mg/kg组的GPT活力差异显著(P<0.05);TP含量,T-AOC、SOD、GSH-Px活力,GSH含量的变化趋势与GPT和GOT等相反,且随着投喂时间的增加,120mg/kg组的T-AOC、SOD、GSH-Px活力和TP、GSH含量以及240 mg/kg组的SOD、GSH-Px活力和GSH含量呈先降后升趋势(P <0.05),其余各组差异均不显著(P> 0.05);肝脏组织切片显示,饲料中添加姜黄素可一定程度上修复鲤鱼幼鱼的肝脏损伤,且以120 mg/kg组效果最佳;饲料中添加姜黄素可提高鲤鱼肝脏Nrf2 mRNA表达量,促使Nrf2由肝细胞质转至细胞核中。【结论】姜黄素可通过介导Nrf2提高鲤鱼相关抗氧化酶的活力,对鱼体的肝脏损伤进行修复。当姜黄素的添加水平为120 mg/kg时,机体的抗氧化功能最强,对肝脏损伤的修复作用最强。

关键词(KeyWords)： 鲤;肝脏损伤;修复;姜黄素;Nrf2

Abstract:

Keywords:

基金项目(Foundation): 山东省自然科学基金项目(ZR2018PC030)

作者(Author): 张媛媛,宋理平,郭辉,王晓丽

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