益糖康对db/db小鼠白色脂肪棕色化及PINK1/Parkin通路的影响  

Effects of Yitangkang on Browning of White Adipose and PINK1/Parkin Pathway in db/db Mice

作　　者：张晖[1] 孙立亚 王庆峰 孙贵炎 申鑫惠 胡锦浩 石岩[1] 杨宇峰[1] ZHANG Hui;SUN Liya;WANG Qingfeng;SUN Guiyan;SHEN Xinhui;HU Jinhao;SHI Yan;YANG Yufeng(Liaoning University of Traditional Chinese Medicine,Shenyang 110847,China)

机构地区：[1]辽宁中医药大学,辽宁沈阳110847

出　　处：《中国中医药信息杂志》2024年第12期91-98,共8页Chinese Journal of Information on Traditional Chinese Medicine

基　　金：国家中医药管理局青年岐黄学者项目(2022年);辽宁省应用基础研究计划(2023JH2/101300050);辽宁省中央引导地方科技发展专项(2019JH6/10200009);辽宁省“兴辽英才计划”青年拔尖人才项目(XLYC1807145)。

摘　　要：目的观察益糖康对db/db小鼠白色脂肪棕色化及脂肪组织PINK1/Parkin通路的影响。方法将30只6周龄db/db小鼠随机分为模型组、益糖康组(30 g/kg)和利拉鲁肽组(200μg/kg),另将10只同周龄C57BL/6小鼠作为正常组,分别予相应药物或生理盐水灌胃5周。给药期间定时检测小鼠体质量及空腹血糖(FBG),对小鼠肝脏、白色及棕色脂肪进行称重,生化分析仪测定血清总胆固醇(TC)、三酰甘油(TG)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)含量,HE染色观察腹股沟白色脂肪组织(iWAT)形态,免疫组化染色检测iWAT棕色化标志性蛋白解偶联蛋白-1(UCP1)表达,Western blot检测iWAT棕色化相关蛋白UCP1、PR结构域蛋白16(PRDM16)、过氧化物酶体增殖物激活受体γ共激活因子-1α(PGC-1α)及线粒体自噬相关蛋白PINK1、Parkin、Beclin-1、p62蛋白表达。结果与正常组比较,模型组小鼠体质量及肝脏、白色脂肪、棕色脂肪质量明显增加(P<0.01),FBG及血清TC、TG、LDL-C含量明显升高(P<0.01),HDL-C含量明显降低(P<0.01);iWAT脂肪细胞出现大空泡、直径明显增大,部分细胞挤压变形,边缘不清晰,iWAT UCP1、PRDM16、PGC-1α、p62蛋白表达降低(P<0.01),PINK1、Parkin、Beclin-1蛋白表达升高(P<0.01)。与模型组比较,益糖康组及利拉鲁肽组小鼠体质量及肝脏、白色脂肪质量明显减少(P<0.01),FBG及血清TC、TG、LDL-C含量明显降低(P<0.05,P<0.01),HDL-C含量明显升高(P<0.01);iWAT脂肪细胞直径减小、数目增多、形态规则,iWAT UCP1、PRDM16、PGC-1α、p62蛋白表达升高(P<0.01),PINK1、Parkin、Beclin-1蛋白表达降低(P<0.05,P<0.01)。结论益糖康能改善db/db小鼠糖脂代谢,促进白色脂肪棕色化,可能通过影响PINK1/Parkin通路介导的线粒体自噬发挥作用。Objective To investigate the effects of Yitangkang on browning of white adipose and PINK1/Parkin pathway of mitophagy in adipose tissue of db/db mice.Methods Totally 30 six-week db/db mice were randomly divided into model group,Yitangkang Group(30 g/kg)and liraglutide group(200μg/kg),and another 10 C57BL/6 mice of the same age were set as normal group.All groups were treated with corresponding drugs or normal saline for 5 weeks.During the period of administration,the body mass and fasting blood glucose(FBG)of mice in each group were detected regularly,the samples of liver,white and brown adipose of mice were weighed,the contents of serum triglyceride cholesterol(TC),triacylglycerol(TG),low-density lipoprotein cholesterol(LDL-C)and high-density lipoprotein cholesterol(HDL-C)were detected by biochemical analyzer,HE staining was used to observe the pathological changes of inguinal white adipose tissue(iWAT),immunohistochemical staining was used to detect the expression of browning marker protein uncoupling protein-1(UCP1)in iWAT,Western blot was used to detect the expressions of browning-related proteins UCP1,PRDM16,PGC-1αand mitophagy-related proteins PINK1,Parkin,Beclin-1,p62 in iWAT.Results Compared with the normal group,the body mass,liver,white adipose and brown adipose mass of the model group significantly increased(P<0.01),the FBG and serum TG,TC and LDL-C contents significantly increased(P<0.01),and the content of HDL-C significantly decreased(P<0.01);large vacuoles in iWAT adipocytes,the diameter of adipocytes increased obviously,some adipocytes were extruded and deformed,and the edge of adipocytes was not clear,the expressions of iWAT UCP1,PRDM16,PGC-1αand p62 proteins decreased(P<0.01),while the expressions of PINK1,Parkin and Beclin-1 proteins increased(P<0.01).Compared with the model group,the body mass,liver and white adipose mass significantly decreased in Yitangkang group and the liraglutide group(P<0.01),FBG and serum contents of TC,TG and LDL-C were significantly decreased(P<0.05,P<0.01),while H

关 键 词：益糖康 2型糖尿病 白色脂肪棕色化 线粒体自噬 解偶联蛋白-1 PINK1/Parkin通路 

分 类 号：R285.5[医药卫生—中药学]