摘要
目的探讨薯蓣皂苷(dioscin)对尿酸(uric acid,UA)诱导的人肾小管上皮细胞(HK-2)氧化应激损伤的影响及分子机制。方法将HK-2细胞分为正常组、模型组(尿酸刺激造模)、条件对照组(尿酸+DMSO)和薯蓣皂苷组(尿酸+薯蓣皂苷)。通过尿酸诱导HK-2细胞氧化应激损伤模型;采用CCK-8法检测细胞活力,流式细胞技术检测细胞活性氧(ROS)水平,Real-time PCR法检测糖原合成激酶3(GSK3β)、核转录因子红系2相关因子2(Nrf2)和血红素加氧酶1(HO-1)在mRNA水平的表达,Western Blot法检测GSK3β、磷酸化糖原合成激酶3(p-GSK3β)、Nrf2及HO-1在蛋白水平的表达。结果经尿酸刺激后,HK-2细胞的活力明显下降,ROS水平明显升高(均P<0.001)。经薯蓣皂苷治疗后,HK-2细胞的活力增加,ROS水平明显降低(均P<0.001)。在蛋白及mRNA水平上,尿酸刺激后Nrf2和HO-1的表达均下降,薯蓣皂苷干预后Nrf2和HO-1表达均明显增加(均P<0.001)。在蛋白水平上,模型组细胞p-GSK3β/GSK3β比值较正常组明显下降,经薯蓣皂苷干预后p-GSK3β/GSK3β比值升高(均P<0.001)。结论薯蓣皂苷可能是通过促进GSK3β的磷酸化,激活Nrf2/HO-1通路,从而缓解尿酸诱导的HK-2细胞氧化应激损伤。
Objective To investigate the effect of dioscin on uric acid(UA)-induced oxidative stress injury of human renal tubular epithelial cells(HK-2)and its molecular mechanism.Methods HK-2 cells were cultured and divided into four groups:blank group(normal group),model group(uric acid-stimulation modeling),condition control group(UA+DMSO)and dioscin group(UA+dioscin).Oxidative stress injury model was induced by UA in HK-2 cells.Cells viability was detected by CCK-8.ROS level was detected by flow cytometry.Real-time PCR was used to detect the expressions of glycogen synthase kinase 3β(GSK3β),nuclear factor erythroid 2-related factor 2(Nrf2)and heme oxygenase 1(HO-1)at mRNA level,and Western Blot was used to detect the expressions of phosphorylated glycogen synthesis kinase 3β(p-GSK3β),GSK3β,Nrf2 and HO-1 at protein level.Results After stimulation by UA,HK-2 cells viability was obviously decreased,and ROS level was significantly increased(all P<0.001).When treated with dioscin,HK-2 cells viability was obviously increased,and the ROS level of HK-2 cells was significantly decreased(all P<0.001).The expressions of Nrf2 and HO-1 decreased at the protein and mRNA levels after stimulation with UA.But the expressions of Nrf2 and HO-1 significantly increased after treated with dioscin(all P<0.001).Compared with the blank group,the p-GSK3β/GSK3βratio in the model group decreased significantly at the protein level,but the p-GSK3β/GSK3βratio increased after treated with dioscin(all P<0.001).Conclusion Dioscin can alleviate UA-induced oxidative stress injury in HK-2 cells.The mechanism might be that dioscin can promote phosphorylation of GSK3β,and activate Nrf2/HO-1 pathway.
作者
周丽娟
张伟梁
刘瑞琦
冯嘉树
黄颖娟
伍新林
ZHOU Lijuan;ZHANG Weiliang;LIU Ruiqi;FENG Jiashu;HUANG Yingjuan;WU Xinin(Department of Traditional Chinese Medicine,The First Affiliated Hospital,Sun Yat-sen University,Guangzhou 510080 Guangdong,China)
出处
《中药新药与临床药理》
CAS
CSCD
北大核心
2024年第3期342-348,共7页
Traditional Chinese Drug Research and Clinical Pharmacology
基金
国家自然科学基金项目(81973765)。
