原花青素对反式脂肪酸致小鼠肝脏损伤的修复作用
2019-10-21王友良甘功友张冬初刘艳华何卫国陈静
王友良 甘功友 张冬初 刘艳华 何卫国 陈静



摘 要:目的:探讨原花青素(Proanthocyanidins, PC)对反式脂肪酸(trans fatty acids, TFAs)染毒小鼠肝脏损伤的修复及其可能机制。方法:将50只成年昆明(KM)小鼠(雌雄各半)随机分为5组,正常对照组、TFA组(100 mg·kg-1剂量的TFA)、TFA+低、中、高剂量PC组(100 mg·kg-1剂量的TFA+50、100、150 mg·kg-1剂量的PC),隔天灌胃生理盐水和反式脂肪酸,总共灌胃60天,待实验结束后,检测小鼠丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)水平和超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)活性及丙二醛(MDA)含量,并对肝脏组织进行病理检测。结果:与对照组比较,TFA染毒组小鼠体重、肝脏脏器系数、ALT、AST及MDA含量增加(P<0.05);SOD、GSH-Px活性降低(P<0.05);肝脏组织结构中肝小叶出现紊乱,肝细胞出现不同程度的坏死;与TFA染毒组相比,TFA+低、中、高PC组小鼠体重、肝脏脏器系数、ALT、AST及MDA含量降低(P<0.05);SOD、GSH-Px活性提高(P<0.05);且肝脏的损伤程度得到了明显改善。结论:PC对TFA染毒小鼠的肝脏损伤具有保护作用,实验表明其机制可能与原花青素具有抑制细胞损伤和清除氧自由基的作用有关。
关键词:原花青素;反式脂肪酸;肝脏损伤;抗氧化
Abstract:Objective: To investigate the effect of proantho cyanidins (PC) on liver injury induced by trans fatty acids (TFA) in mice and its possible mechanism. Methods Fifty adult KM mice (half male and half female) were randomly divided into 5 groups: Normal control group, TFA group (100 mg·kg-1 TFA), TFA + low, medium and high doses PC group (100 mg·kg-1 TFA + 50, 100, 150 mg·kg-1 PC) were perfused with normal saline and trans fatty acids every other day for
60 days. After the experiment, the levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST) and superoxide dismutase (SOD) were detected. Results Compared with the control group, the body weight, liver viscera coefficient, ALT, AST and MDA contents in TFA-exposed mice increased (P<0.05). The activities of SOD and GSH-Px were decreased (P<0.05). The hepatic lobules appeared disorder in the liver tissue structure, and the hepatocytes appeared necrosis in varying degrees. Compared with TFA exposure group, the body weight, liver organ coefficient, ALT, AST and MDA contents in TFA + low, medium and high PC groups were decreased (P<0.05). The activities of SOD and GSH-Px increased (P<0.05). And the degree of liver injury was significantly improved. Conclusion: PC has protective effect on liver injury induced by TFA in mice. The mechanism may be related to the inhibition of cell injury and scavenging of oxygen free radicals by procyanidins.
Key words:Proanthocyanidins; Trans fatty acid; Liver injury; Anti-oxidative
中圖分类号:R285.5
原花青素(proantho cyanidins,PC)是广泛存在于山楂、葡萄籽、玉米、蓝莓、桑葚和松树皮等植物中的一大类多酚化合物的总称,目前国际上公认其为清除机体自由基最有效的天然抗氧化剂[1]。诸多研究表明,原花青素具有多种生物活性,具有抗炎、抗氧化、抗肿瘤、纠正胰岛素抵抗、保护心血管功能等作用[2-4],
目前研究发现,原花青素可拮抗反式脂肪酸所致的小鼠肝脏毒性,但关于PC修复反式脂肪酸肝脏毒性的研究未见报道,本实验以小鼠为研究对象,对小鼠给予原花青素干预,然后进行TAF染毒,探讨PC的预防修复作用。
反式脂肪酸(Trans fatty acids,TFA)是一类含有反式构型非共轭双键的不饱和脂肪酸的总称[5]。研究表明,在一些油炸食品、人造奶油、面包、蛋糕、饼干、炸薯条、炸薯片奶油和黄油等食品中含有大量的TFA[6-7]。
然而,在光、热及催化剂的作用下,在食物油脂的氢化过程中,顺式脂肪酸可以转变为TFA[8]。……
