小白菊内酯通过抑制Piezo1表达对机械牵张应力作用下软骨细胞凋亡的影响及其机制  

Effect of parthenolide on apoptosis of chondrocyte under mechanical stretch stress by inhibiting Piezo1 expression and its mechanism

作　　者：马旋 杨开祥 邓海 黄玉成 MA Xuan;YANG Kaixiang;DENG Hai;HUANG Yucheng(Department of Orthopedic Trauma,NO.4 Hospital,Wuhan City,Hubei Province,Wuhan 430030,China;Department of Articular Surgery,NO.4 Hospital,Wuhan City,Hubei Province,Wuhan 430030,China)

机构地区：[1]湖北省武汉市第四医院创伤骨科,湖北武汉430030 [2]湖北省武汉市第四医院关节外科,湖北武汉430030

出　　处：《吉林大学学报（医学版）》2024年第6期1621-1631,共11页Journal of Jilin University：Medicine Edition

基　　金：湖北省卫健委青年人才项目(WJ2021Q002)。

摘　　要：目的:探讨小白菊内酯(PTL)通过调控机械敏感性离子通道蛋白1(Piezo1)表达对机械牵张应力作用下软骨细胞凋亡的影响,并阐明其相关作用机制。方法:按照拉伸性变量将软骨细胞分为0%、5%、10%、15%和20%拉伸组。另取软骨细胞,分为对照组、20%拉伸组、20%拉伸+5μmol·L^(-1)PTL组、20%拉伸+10μmol·L^(-1)PTL组和20%拉伸+20μmol·L^(-1)PTL组。使用Piezo1短发夹RNA(shRNA)干扰慢病毒(sh-Piezo1)或shRNA-NC慢病毒感染软骨细胞,将软骨细胞分为sh-Piezo1组和sh-NC组,另设置空白对照组。另将软骨细胞分为20%拉伸组、20%拉伸+PTL组、20%拉伸+sh-Piezo1组和20%拉伸+sh-Piezo1+PTL组。Hoechst 33258荧光染色观察各组细胞核形态表现,流式细胞术检测各组细胞凋亡率,分光光度法检测各组细胞中含半胱氨酸的天冬氨酸蛋白酶(Caspase)-3活性,CCK-8法检测各组细胞增殖率,Fluo-4/AM荧光探针法检测各组细胞中钙离子(Ca2+)水平,实时荧光定量PCR(RT-qPCR)法检测各组细胞中Piezo1 mRNA表达水平,Western blotting法检测各组细胞中Piezo1蛋白表达水平。结果:Hoechst 33258荧光染色观察,随着拉伸量逐渐增加,0%、5%、10%、15%和20%拉伸组软骨细胞细胞核呈碎块状致密浓染的软骨细胞数量逐渐增加。流式细胞术检测,与0%拉伸组比较,5%、10%、15%和20%拉伸组软骨细胞凋亡率均明显升高(P<0.01);与对照组比较,20%拉伸组软骨细胞中细胞凋亡率明显升高(P<0.05);与20%拉伸组比较,20%拉伸+5μmol·L^(-1)PTL组、20%拉伸+10μmol·L^(-1)PTL组和20%拉伸+20μmol·L^(-1)PTL组软骨细胞细胞凋亡率均明显降低(P<0.05);与20%拉伸组比较,20%拉伸+PTL组和20%拉伸+sh-Piezo1组软骨细胞凋亡率均明显降低(P<0.05)。分光光度法检测,与0%拉伸组表示,5%、10%、15%和20%拉伸组软骨细胞中Caspase-3活性均明显升高(P<0.01);与对照组比较,20%拉伸组软骨细胞中Caspase-3活性明显升高(P<0.05);与20%拉伸组比较,20%拉伸+Objective:To discuss the effect of parthenolide(PTL)on the apoptosis of the chondrocytes under mechanical stretch stress by regulating the expression of piezo type mechanosensitive ion channel component 1(Piezo1),and to clarify the related mechanism.Methods:The chondrocytes were divided into 0%,5%,10%,15%,and 20%stretch groups according to the stretch variable.Additionally,the chondrocytes were divided into control group,20%stretch group,20%stretch+5μmol·L^(-1) PTL group,20%stretch+10μmol·L^(-1) PTL group,and 20%stretch+20μmol·L^(-1) PTL group.The Piezo1 short hairpin RNA(shRNA)interference lentivirus(sh-Piezo1)or shRNA-NC lentivirus were used to infect the chondrocytes,and the chondrocytes were divided into sh-Piezo1 group and sh-NC group,and also set up blank control group.The chondrocytes were also devided into 20%stretch group,20%stretch+PTL group,20%stretch+sh-Piezo1 group,and 20%stretch+sh-Piezo1+PTL group.Hoechst 33258 fluorescence staining was used to observe the morphology of the nuclear in various groups;flow cytometry was used to detect the apoptotic rates of the cells in various groups;spectrophotometry was used to detect the cysteinyl aspartate specific proteinase(Caspase)-3 activities in the cells in various groups;CCK-8 method was used to detect the proliferation rates of the cells in various groups;Fluo-4/AM fluorescent probe method was used to detect the calicium ion(Ca2+)levels in the cells in various groups;real-time fluorescence quantitative PCR(RT-qPCR)method was used to detect the expression levels of Piezo1 mRNA in the cells in various groups;Western blotting method was used to detect the expression levels of Piezo1 protein in the cells in various groups.Results:The Hoechst 33258 fluorescence staining resuts showed that as the increasing of stretch,the number of the chondrocytes with fragmented and densely stained nuclei in 0%,5%,10%,15%,and 20%stretch groups were gradually increased.The flow cytometry results showed that compared with 0%stretch group,the apoptotic rates of the chondr

关 键 词：小白菊内酯 机械敏感离子通道蛋白1 机械牵张应力 软骨细胞 细胞凋亡 

分 类 号：R681.3[医药卫生—骨科学]