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二甲双胍对非酒精性脂肪性肝炎大鼠肝损伤的改善作用
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吴 霜 ,程海林 ,刘 丹 ,肖 婷 ,吴兴邦 ,李华东 ,胡旭东 [1.华中科技大学同济医学院附属武汉金银潭
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医院(湖北省传染病临床医学研究中心)消化科,武汉 430023;2.华中科技大学同济医学院附属武汉金银潭医
院(湖北省传染病临床医学研究中心)感染科,武汉 430023]
中图分类号 R965 文献标志码 A 文章编号 1001-0408(2025)07-0837-06
DOI 10.6039/j.issn.1001-0408.2025.07.12
摘 要 目的 探究二甲双胍(Met)调控磷脂酰肌醇3激酶/蛋白激酶B/血小板源性生长因子(PI3K/AKT/PDGF)信号通路对非酒
精性脂肪性肝炎(NASH)大鼠肝损伤的影响。方法 以高糖高脂饮食饲喂大鼠构建 NASH 模型,造模成功后随机分为模型组
(Model组)、Met低剂量组(Met-L组,100 mg/kg)、Met中剂量组(Met-M组,200 mg/kg)、Met高剂量组(Met-H组,400 mg/kg)、高剂
量Met+PI3K激活剂组(Met-H+740 Y-P组,400 mg/kg Met+50 mg/kg 740 Y-P),另设对照组(Control组),每组12只。各组大鼠每天
灌胃/注射相应药物1次,连续6周。分析大鼠体重和肝指数变化;观察大鼠肝组织病理损伤[评估非酒精性脂肪性肝病活动度评分
(NAS)]、脂质沉积(计算油红O阳性染色面积占比)和纤维化(计算胶原沉积分数)情况;检测大鼠血清和肝组织中炎症因子[白细
胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)]水平以及血清中脂代谢[总胆固醇(TC)、甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)]
和肝功能[天冬氨酸转氨酶(AST)、丙氨酸转氨酶(ALT)]指标水平;检测大鼠肝组织中PI3K/AKT/PDGF信号通路相关蛋白和胱天
蛋白酶3(Caspase-3)蛋白表达水平。结果 与Control组比较,Model组大鼠体重和肝指数,血清中脂代谢和肝功能指标水平,血清
和肝组织中 IL-6、TNF-α 水平,NAS,油红 O 阳性染色面积占比,胶原沉积分数,肝组织中 PI3K、AKT 蛋白磷酸化水平和 PDGF、
Caspase-3蛋白表达水平均显著升高(P<0.05);肝组织病理损伤严重,富含脂滴,胶原沉积明显。经Met干预后,大鼠上述定量指
标和病理变化均显著改善(P<0.05),且呈剂量依赖性(P<0.05)。740 Y-P 可显著逆转高剂量 Met 对大鼠上述指标的改善作用
(P<0.05)。结论 Met可改善NASH大鼠肝损伤,减轻炎症反应和肝纤维化,其作用机制可能与抑制PI3K/AKT/PDGF信号通路活
性有关。
关键词 二甲双胍;非酒精性脂肪性肝炎;肝损伤;脂代谢;肝纤维化;PI3K/AKT/PDGF信号通路
Improvement effect of metformin on liver injury in non-alcoholic steatohepatitis rats
WU Shuang ,CHENG Hailin ,LIU Dan ,XIAO Ting ,WU Xingbang ,LI Huadong ,HU Xudong [1. Dept. of
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Gastroenterology, Wuhan Jinyintan Hospital, Tongji Medical College of Huazhong University of Science and
Technology (Hubei Clinical Research Center for Infectious Disease), Wuhan 430023, China;2. Dept. of
Infection, Wuhan Jinyintan Hospital, Tongji Medical College of Huazhong University of Science and
Technology (Hubei Clinical Research Center for Infectious Disease), Wuhan 430023, China]
ABSTRACT OBJECTIVE To investigate the effects of metformin (Met) on liver injury in non-alcoholic steatohepatitis (NASH)
rats by regulating the PI3K/AKT/PDGF signaling pathway. METHODS NASH model was constructed by feeding rats with a high-
glucose and high-fat diet, and assigned into Model group, Met low-dose group (Met-L group, 100 mg/kg), Met medium-dose
group (Met-M group, 200 mg/kg), Met high-dose group (Met-H group, 400 mg/kg), and high dose of Met+PI3K activator group
(Met-H+740 Y-P group, 400 mg/kg Met+50 mg/kg 740 Y-P), with 12 rats in each group. Another 12 rats were regarded as the
Control group. Each group of rats was orally administered/injected with the corresponding medication once a day for 6 consecutive
weeks. The changes in body weight and liver index of rats were recorded and analyzed. The pathological damage [evaluation of
non-alcoholic fatty liver disease activity score (NAS)], lipid deposition (calculation of the proportion of oil red O-positive staining
area), and fibrosis (calculation of collagen deposition score) were observed in liver tissue of rats. The levels of inflammatory
factors [interleukin-6 (IL-6) and tumor necrosis factor-α (TNF-α)] in serum and liver tissue, the levels of serum lipid metabolism
indicators [total cholesterol (TC), triglyceride (TG), and low-density lipoprotein cholesterol (LDL-C)] and liver function
indicators [aspartate aminotransferase (AST) and alanine
Δ 基金项目 武汉市知识创新专项项目(No.2022020801010588); aminotransferase (ALT)] were measured. The expression levels
武汉市医学科研项目(No.WY22A05) of PI3K/AKT/PDGF signaling pathway-related proteins and
*第一作者 主治医师,硕士。研究方向:消化肝病。E-mail: Caspase-3 in liver tissue of rats were determined. RESULTS
yt0viv@163.com
# 通信作者 主任医师。研究方向:消化肝病。E-mail:xyhut41@ Compared with the Control group, body weight, liver index,
163.com the levels of serum lipid metabolism indicators and liver
中国药房 2025年第36卷第7期 China Pharmacy 2025 Vol. 36 No. 7 · 837 ·