二甲双胍可能通过腺苷酸活化蛋白激酶通路减少高脂饮食诱导小鼠肝脏脂质蓄积

目的观察二甲双胍对高脂饮食诱导的C57BL/6J小鼠肝脏脂质蓄积的影响并探讨其机制。方法通过高脂喂养C57BL/6J小鼠6周造非酒精性脂肪性肝病(NAFLD)模型。将10周龄小鼠分为3组:正常对照组(ND组,n=10,标准饲料喂养)、高脂喂养组(HFD组,n=12,高脂饲料喂养,300 μl生理盐水灌胃每日1次)和二甲双胍组(Met组,n=12,高脂饲料喂养,二甲双胍300 mg/kg体重溶于300 μl生理盐水中灌胃,每日1次)。分别干预4周后比较3组小鼠的体重、摄食量、血脂、肝酶、肝脏脂肪变程度、肝脏组织中甘油三酯(TG)和总胆固醇(TC)含量以及肝脏组织中脂代谢相关蛋白的表达。两组间比较...

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Published in中华糖尿病杂志 Vol. 10; no. 2; pp. 138 - 143
Main Author 程亚芬;孙明晓;郭君;黎健;郭立新
Format Journal Article
LanguageChinese
Published 100730,北京大学第五临床医学院%北京怡德医院内分泌科%北京医院国家老年医学中心评估室%北京医院国家老年医学中心生化室 2018
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Summary:目的观察二甲双胍对高脂饮食诱导的C57BL/6J小鼠肝脏脂质蓄积的影响并探讨其机制。方法通过高脂喂养C57BL/6J小鼠6周造非酒精性脂肪性肝病(NAFLD)模型。将10周龄小鼠分为3组:正常对照组(ND组,n=10,标准饲料喂养)、高脂喂养组(HFD组,n=12,高脂饲料喂养,300 μl生理盐水灌胃每日1次)和二甲双胍组(Met组,n=12,高脂饲料喂养,二甲双胍300 mg/kg体重溶于300 μl生理盐水中灌胃,每日1次)。分别干预4周后比较3组小鼠的体重、摄食量、血脂、肝酶、肝脏脂肪变程度、肝脏组织中甘油三酯(TG)和总胆固醇(TC)含量以及肝脏组织中脂代谢相关蛋白的表达。两组间比较采用t检验,多组间比较采用单因素方差分析。结果与HFD组相比,Met组小鼠体重明显降低[(32.9±1.1)比(36.4±1.1) g,t=2.257,P〈0.05],但两组摄食量没有统计学差异(t=1.191,P〉0.05)。与HFD组相比,二甲双胍干预4周后,TG、低密度脂蛋白胆固醇、谷丙转氨酶及谷草转氨酶水平明显降低(t=2.285-2.860,均P〈0.05)。与HFD组相比,Met组小鼠肝脏中脂质浸润显著减少(t=28.000,P〈0.001)、肝脏中TG与TC含量明显降低(t=2.394、2.281,均P〈0.05)。与HFD组相比,干预4周后,Met组腺苷酸活化蛋白激酶(AMPK)α、乙酰辅酶A羧化酶蛋白磷酸化水平增高(0.82±0.07比0.59±0.03、0.94±0.12比0.42±0.10,t=-2.892、-3.463,均P〈0.05);固醇调节元件结合蛋白1-c、脂肪酸合成酶蛋白表达水平降低(1.24±0.05比1.56±0.08、1.09±0.07比1.42±0.06,t=3.447、3.507,均P〈0.05)。结论二甲双胍可能通过AMPK通路减少高脂饮食诱导的C57BL/6J小鼠肝脏中脂质蓄积,有望成为NAFLD的治疗药物。
Bibliography:Objective To observe the effects of metformin on hepatic lipid accumulation in high-fat-diet-induced C57BL/6J mice and discuss its mechanism.Methods Non-alcoholic fatty liver disease (NAFLD) models were established by feeding C57BL/6J mice with a high-fat-diet for 6 weeks. C57BL/6J mice aged 10 weeks were divided into three groups as followings: normal diet group (ND group, n=10, fed with a normal chow diet), high-fat diet group (HFD group, n=12, fed with a high fat diet and given 300 μl of saline by gastric perfusion once a day) and metformin group (Met group, n=12, fed with a high-fat diet and given 300 μl of saline dissolving with 300 mg/kg of metformin by gastric perfusion once a day). Body weight, the amount of food intake, serum lipids, hepatic enzymes, hepatic lipid infiltration, contents of hepatic triglyceride (TG), total cholesterol (TC) and expression levels of proteins related to lipid metabolism in liver tissue were compared among those 3 groups after 4-week intervention. The t test was performed
ISSN:1674-5809
DOI:10.3760/cma.j.issn.1674-5809.2018.02.010