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紫苏叶多糖对糖尿病模型小鼠胰腺组织氧化应激及 PI3K/AKT/
GLUT4信号通路的影响 Δ
孙广平 ,袁 丽,方晓琳,杨海波(吉林市化工医院内分泌科,吉林 吉林 132022)
*
中图分类号 R285 文献标志码 A 文章编号 1001-0408(2020)15-1874-06
DOI 10.6039/j.issn.1001-0408.2020.15.14
摘 要 目的:研究紫苏叶多糖对糖尿病(DM)模型小鼠胰腺组织氧化应激及磷酸肌醇-3-激酶(PI3K)/苏氨酸蛋白激酶(AKT)/葡
萄糖转运蛋白4(GLUT4)信号通路的影响。方法:取60只小鼠,采用腹腔注射链脲佐菌素(60 mg/kg)的方法复制糖尿病模型。将
造模成功的40只小鼠随机分为模型组、二甲双胍组(阳性对照,200 mg/kg)和紫苏叶多糖高、低剂量组(400、200 mg/kg),每组10
只;另取10只健康小鼠作为正常组(生理盐水)。每天灌胃给药1次,连续给药28 d。实验期间,观察小鼠一般状况和体质量变化;
进行口服葡萄糖耐量(OGTT)实验[测定灌胃40%葡萄糖溶液0、30、60、120 min后的空腹血糖(FBG)水平]。末次给药后,测定小
鼠血糖相关指标[FBG、空腹胰岛素(FINS)和胰岛素敏感指数(ISI)、胰岛素抵抗指数(IRI)]、血脂相关指标[血清中高密度脂蛋白
胆固醇(HDL-C)、低密度脂蛋白胆固醇(LDL-C)、总胆固醇(TC)、三酰甘油(TG)]和氧化应激相关指标[胰腺组织中丙二醛(MDA)
含量和超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)活性]的变化,并测定小鼠胰腺组织中PI3K、磷
酸化AKT(p-AKT)和GLUT4蛋白表达水平。结果:实验期间,与正常组比较,模型组小鼠行动迟缓,饲料消耗量和饮水量增多,体
质量显著增加(P<0.05);给予葡萄糖 0、30、60、120 min 后,小鼠的 FBG 水平均显著升高(P<0.05);末次给药后,血清中 FINS、
HDL-C含量和ISI以及胰腺组织中SOD、CAT、GSH-Px活性和PI3K、p-AKT、GLUT4蛋白表达水平均显著降低(P<0.05),而血清
中FBG、LDL-C、TC、TG含量和IRI以及胰腺组织中MDA含量均显著升高(P<0.05)。与模型组比较,各给药组小鼠一般情况和
OGTT情况均有好转;血清中FINS、HDL-C含量和ISI以及胰腺组织中SOD、CAT、GSH-Px活性和PI3K、p-AKT、GLUT4蛋白表达
水平均显著升高(P<0.05),而血清中FBG、LDL-C、TC、TG含量和IRI以及胰腺组织中MDA 含量均显著降低(P<0.05)。结论:
紫苏叶多糖具有抗糖尿病作用,该作用可能与降低氧化应激水平和促进PI3K/AKT/GLUT4信号通路的活化有关。
关键词 紫苏叶多糖;氧化应激;PI3K/AKT/GLUT4信号通路;糖尿病;小鼠
Effects of Purple frutescens Leaves Polysaccharides on Oxidative Stress and PI3K/AKT/GLUT4 Signaling
Pathway of Pancreatic Tissues in Diabetes Mellitus Model Mice
SUN Guangping,YUAN Li,FANG Xiaolin,YANG Haibo(Dept. of Endocrinology,Jilin Chemical Hospital,
Jilin Jilin 132022,China)
ABSTRACT OBJECTIVE:To study the effects of Purple frutescens leaves polysaccharides (PPLPs) on oxidative stress and
PI3K/AKT/GLUT4 signaling pathway of pancreatic tissues in diabetes mellitus(DM)model mice. METHODS:Totally 60 mice
were given intraperitoneal injection of STZ(60 mg/kg)to induce DM model. The 40 successful modeling mice were randomly
divided into model group,metformin group (positive control,200 mg/kg),PPLPs high-dose and low-dose groups (400,200
mg/kg),with 10 mice in each group. Another 10 healthy mice were selected as the normal group(normal saline). They were given
relevant medicine intragastrically,once a day,for consecutive 28 days. During the experiment,general information and body
weight of mice were observed;oral glucose tolerance(OGTT)test(determining FBG at 0,30,60,120 min after giving 40%
glucose solution)was conducted. After last medication,the changes of related blood glucose indexes(FBG,FINS,ISI,IRI),
blood lipid indexes (HDL-C,LDL-C,TC,TG) and oxidant stress indexes (MDA content and the activities of SOD,CAT,
GSH-Px)as well as the protein expressions of PI3K,p-AKT and GLUT4 in pancreatic tissue were determined. RESULTS:During
the experiment,compared with normal group,the mice were slow in action,the feed consumption and water consumption
increased,and body weight significantly increased in model group(P<0.05). 0,30,60,120 min after giving glucose,the FBG
content of mice were all increased significantly(P<0.05). After last medication,the contents of FINS and HDL-C in serum as
well as ISI,the activities of SOD,CAT and GSH-Px as well as the protein expressions of PI3K,p-AKT and GLUT4 in pancreatic
tissue were all decreased significantly(P<0.05);the contents
Δ 基金项目:吉林市医疗卫生指导性计划项目(No.201737133)
of FBG and LDL-C,TC and TG in serum as well as IRI,
*副主任医师,硕士。研究方向:糖尿病及其并发症的基础与治
疗。E-mail:sunguangping83@163.com MDA content in pancreatic tissue were all increased
·1874 · China Pharmacy 2020 Vol. 31 No. 15 中国药房 2020年第31卷第15期