凝集素样氧化型低密度脂蛋白受体1通过糖原合成酶激酶-3β/信号转导和转录激活因子3通路调控高糖诱导的心肌成纤维细胞纤维化的研究  

Lectin-like oxidized low-density lipoprotein receptor-1 regulates cardiac fibroblasts fibrosis induced by high glucose through glycogen synthase kinase-3β/signal transducer and activator of transcription 3 pathway

作　　者：刘亚倩 刘静[2] 田利民[2] 王志宏 司惠玲 张雅娟 仇菊梅 段奇党 张延燕 张娜 赵文淑 汪霞 张琦[2] LIU Yaqian;LIU Jing;TIAN Limin(The First Clinical College of Gansu University of Traditional Medicine,Gansu Provincial People's Hospital,Lanzhou 730000,China)

机构地区：[1]甘肃中医药大学第一临床医学院,兰州730000 [2]甘肃省人民医院老年医学科 [3]兰州市第一人民医院耳鼻喉头颈外科

出　　处：《中国糖尿病杂志》2024年第5期373-379,共7页Chinese Journal of Diabetes

基　　金：国家自然科学基金(82160166、81960173);甘肃省自然科学基金(20JR10RA389);甘肃省人民医院国家级科研培育项目(19SYPYB-4);兰州市人才创新创业项目(2021-RC-136);兰州市卫生健康委科技发展项目(2021005)。

摘　　要：目的 探讨凝集素样氧化型低密度脂蛋白受体1(LOX-1)通过糖原合成酶激酶-3β(GSK-3β)/信号转导和转录激活因子3(STAT3)通路调控高糖诱导的心肌成纤维细胞(CFs)纤维化的相关机制。方法 分离、培养及鉴定CFs,构建LOX-1 RNAi慢病毒载体(LV-LOX-1)及慢病毒空载体(LV-Con)并感染CFs。将细胞分为正常对照(NC)组、25 mmol/L葡萄糖的高糖(HG)组、高渗(HPG)组、LV-LOX-1组和LV-Con组,LV-LOX-1及LV-Con感染CFs后加入HG培养24h,记为HG+LV-LOX-1组和HG+LV-Con组,分别使用10μmol/LSB216763和10μmol/L STATTIC处理HG+LV-LOX-1、HG+LV-Con组24h,记为HG+LV-LOX-1+SB216763组、HG+LV-Con+SB216763组、HG+LV-LOX-1+STATTIC组和HG+LV-Con+STATTIC组。CCK-8法检测CFs活力,q RT-PCR和Western blot法检测LOX-1、I型胶原(COL-I)、硫氧还蛋白5(TXNDC5)、GSK-3β、STAT3、p-GSK-3β、p-STAT3 mRNA和蛋白表达。结果 获得LV-LOX-1感染的CFs,荧光显微镜下呈绿色。与HG、HG+LV-Con组比较,HG+LV-LOX-1组LOX-1、COL-I、TXNDC5m RNA表达降低(P<0.05)。与HG+LV-LOX-1组比较,HG+LV-LOX-1+SB216763、HG+LV-LOX-1+STATTIC组COL-I、TXNDC5 mRNA表达降低(P<0.05)。与HG、HG+LV-Con组比较,HG+LV-LOX-1组p-GSK-3β蛋白表达升高(P<0.05),LOX-1、p-STAT3、COL-I、TXNDC5蛋白表达降低(P<0.05)。与HG+LV-LOX-1组比较,HG+LV-LOX-1+SB216763组p-GSK-3β蛋白表达升高(P<0.05),HG+LV-LOX-1+SB216763、HG+LV-LOX-1+STATTIC组p-STAT3、COL-I、TXNDC5蛋白表达降低(P<0.05)。结论 LOX-1、GSK-3β、STAT3、TXNDC5、COL-I参与高糖诱导的CFs纤维化,LOX-1通过GSK-3β/STAT3通路促进TXNDC5和COL-I表达,抑制LOX-1可抑制高糖诱导的CFs纤维化。Objective To investigate the mechanism by which lectin-like oxidized low density lipoprotein receptor-1(LOX-1) regulates hyperglycemic-induced myocardial fibroblast(CFs) fibrosis through the glycogen synthase kinase-3β(GSK-3β)/signal transducer and activator of transcription 3(STAT3) pathway.Methods CFs were isolated,cultured and identified.LOX-1 RNAi lentiviral vector was constructed and infected CFs.The experimental groups were as follows:Normal control(NC) group,High glucose(HG) group,LV-LOX-1,LV-Con group,Hypertonic(HPG)group.After LV-LOX-1 and LV-Con were infected with CFs,adding 25 mmol/L glucose to culture CFs for 24 h,they were denoted as HG+LV-LOX-1 group and HG+LV-Con group.Cells in HG+LV-LOX-1 group and HG+LV-Con group were treated with 10 μmol/L SB216763 and 10 μmol/L STATTIC for 24 h,respectively,and then they were recorded as HG+LV-LOX-1+SB216763 group,HG+LV-Con+SB216763 group,HG+LV-LOX-1+STATTIC group and HG+LV-Con+STATTIC group.CCK-8 was used to detect the activity of CFs,and the expression levels of m RAN and protein of LOX-1,collagen type I(COL-I),thioredoxin 5(TXNDC5),GSK-3β,STAT3,p-GSK-3β and p-STAT3 were detected by q RT-PCR and Western blot.Results CFs infected with LOX-1 RNAi lentiviral vector were obtained,which showed green under fluorescence microscopy.Compared with HG and HG+LV-Con groups,the mRNA expressions of LOX-1,COL-I and TXNDC5 were decreased in HG+LV-LOX-1 group(P<0.05).Compared with HG+LV-LOX-1 group,m RNA expressions of COL-I and TXNDC5 were decreased in HG+LV-LOX-1+SB216763 and HG+LV-LOX-1+STATTIC groups(P<0.05).Compared with HG and HG+LV-Con groups,p-GSK-3β protein expression was increased in HG+LV-LOX-1 group(P<0.05),while LOX-1,p-STAT3,COL-I,TXNDC5 protein expression was decreased in HG+LV-LOX-1 group(P<0.05).Compared with HG+LV-LOX-1 group,p-GSK-3β protein expression was increased in HG+LV-LOX-1+SB216763 group(P<0.05),while the protein expressions of p-STAT3,COL-I and TXNDC5 were decreased in HG+LV-LOX-1+SB216763 and HG+LV-LOX-1+STATTIC groups(P<0.05).Conclusion L

关 键 词：凝集素样氧化型低密度脂蛋白受体1 糖原合成酶激酶-3Β 信号转导和转录激活因子3 心肌成纤维细胞 纤维化 

分 类 号：R542.2[医药卫生—心血管疾病] R587.2[医药卫生—内科学]