目的研究氯化锂(lithium chloride,LiCl)干预对双侧卵巢切除(ovariectomized,OVX)小鼠骨丢失、Janus激酶/信号转导与转录激活子(The janus kinase/signal transducer and activator of tran-ions,JAK/STAT)信号通路及成骨细胞(osteoblas...目的研究氯化锂(lithium chloride,LiCl)干预对双侧卵巢切除(ovariectomized,OVX)小鼠骨丢失、Janus激酶/信号转导与转录激活子(The janus kinase/signal transducer and activator of tran-ions,JAK/STAT)信号通路及成骨细胞(osteoblast,OB)的影响。方法体内实验:选取8周龄雌性C57BL6/J小鼠24只,分为假手术组(Sham组),OVX组和卵巢切除+氯化锂干预(OVX+LiCl)组。收集动物左右侧股骨及右侧胫骨标本,进行Micro-CT、免疫组织化学和骨生物力学测试。体外实验:处死3日龄C57BL/6小鼠,分离颅骨培养原代OB,分为空白对照组(Control组)和LiCl组进行细胞活性检测、碱性磷酸酶染色、茜素红染色、实时荧光定量PCR检测。结果Micro-CT分析示OVX组骨量减少,骨小梁厚度变薄,骨小梁数量减少,骨小梁分离度增加,LiCl干预显著改善骨丢失。生物力学示OVX组的最大载荷、最大应力均显著低于Sham组(P<0.05),OVX+LiCl组的最大载荷、最大应力较OVX组显著升高(P<0.05)。免疫组化结果示,OVX+LiCl组JAK2和STAT3表达显著高于Sham组(P<0.05);OVX组P-STAT3表达明显低于Sham组(P<0.05),而OVX+LiCl组表达显著升高(P<0.05)。LiCl组的OB增殖活性显著高于对照组(P<0.05)。LiCl组的碱性磷酸酶活性和钙结节数量显著高于OVX组(P<0.05)。LiCl组STAT3 mRNA和OCN mRNA表达显著高于对照组(P<0.05)。结论LiCl通过调控OB改善OVX小鼠骨量和骨微结构,其机制可能与调节JAK/STAT3信号通路有关。展开更多
Objective:To explore the mechanism of action of Dahuang Lingxian Formula in alleviating the inflammatory response of bile duct cells in LPS-induced intrahepatic bile duct inflammation model rats based on IL-6/JAK/STAT...Objective:To explore the mechanism of action of Dahuang Lingxian Formula in alleviating the inflammatory response of bile duct cells in LPS-induced intrahepatic bile duct inflammation model rats based on IL-6/JAK/STAT3 signaling pathway.Methods:Fifty SD rats were randomly divided into five groups,blank group,model group,choling tablets(0.5 g/kg),and low and high concentration groups(2.4 g/kg and 4.8 g/kg)of Dahuang Lingxian Formula,ten rats in each group.Except for the blank group,the rats in each group were injected with 1.25 mg/kg LPS at the common bile duct at one time to construct an animal model of intrahepatic bile duct infection.After gavage on day 8,liver tissues were taken from rats at the hepatic hilum,and the histopathological changes of the hepatic hilum and biliary tree were observed by HE staining.The expression levels of serum glutamic alanine transaminase(ALT),glutamic oxalacetic transaminase(AST),malondialdehyde(MDA)and superoxide dismutase(SOD)were measured by biochemical method.The expression levels of interleukin 6(IL-6),Janus protein tyrosine kinase 2(JAK2),signal transducer and activator of transcription 3(STAT3)in rat serum were measured by enzyme-linked immunosorbent assay(ELISA).Protein immunoblotting(WB)and real-time fluorescence quantitative PCR(RT-qPCR)were used to detect the expression levels of IL-6,JAK2,STAT3 protein and mRNA in biliary tree tissues.Results:①Compared with the blank group,the structures such as interlobular bile ducts in the hepatic sinusoids and portal duct area of the model rats were destroyed,and inflammatory cells infiltrated around them.The expression of ALT,AST,MDA,IL-6,JAK2 and STAT3 in the serum increased significantly,the expression level of SOD decreased,and the expression levels of IL-6,JAK2 and STAT3 proteins and mRNA increased.②Compared with the model group,the degree of liver pathological damage in rats in the Chiling Ning tablet group and the low and high concentration groups of Dahuang Lingxian Formula were improved,which could significantly reduce the expression levels of ALT,AST,MDA,IL-6,JAK2,STAT3 and up-regulate SOD in serum,and down-regulate the expression of IL-6,JAK2,STAT3 protein and mRNA,with the best effect in the high concentration group of Dahuang Lingxian Formula.③Compared with the choling tablet group,the rats in the low and high concentration groups of Dahuang Lingxian Formula tended to normalize the degree of liver pathological damage,without obvious inflammatory cell infiltration,and the expression levels of ALT,AST,MDA,IL-6,JAK2,STAT3 and the expression levels of IL-6,JAK2,STAT3 protein and mRNA in serum were reduced,and the expression levels of SOD were increased,with the best effect of Dahuang Lingxian Formula The treatment effect was best in the high concentration group.Conclusion:The mechanism may be related to the down-regulation of IL-6/JAK/STAT3 signaling pathway activation,and the best therapeutic effect was achieved by the high concentration group of Dahuang Lingxian Formula.展开更多
基金Guangxi Natural Science Foundation(No.2020GXNSFAA238012)Research on Traditional Chinese Medicine Prevention and Treatment of Liver and Bile Related Diseases in the 2021"Qihuang Project"High Level Talent Team Cultivation Project(No.2021006)+1 种基金2020 Guangxi University of Traditional Chinese Medicine First Affiliated Hospital Hospital Hospital Level Doctoral Initiation Fund Project(No.2020BS004)2020 Guangxi University of Traditional Chinese Medicine Introduction Doctoral Research Initiation Fund Project(No.2020BS030)。
文摘Objective:To explore the mechanism of action of Dahuang Lingxian Formula in alleviating the inflammatory response of bile duct cells in LPS-induced intrahepatic bile duct inflammation model rats based on IL-6/JAK/STAT3 signaling pathway.Methods:Fifty SD rats were randomly divided into five groups,blank group,model group,choling tablets(0.5 g/kg),and low and high concentration groups(2.4 g/kg and 4.8 g/kg)of Dahuang Lingxian Formula,ten rats in each group.Except for the blank group,the rats in each group were injected with 1.25 mg/kg LPS at the common bile duct at one time to construct an animal model of intrahepatic bile duct infection.After gavage on day 8,liver tissues were taken from rats at the hepatic hilum,and the histopathological changes of the hepatic hilum and biliary tree were observed by HE staining.The expression levels of serum glutamic alanine transaminase(ALT),glutamic oxalacetic transaminase(AST),malondialdehyde(MDA)and superoxide dismutase(SOD)were measured by biochemical method.The expression levels of interleukin 6(IL-6),Janus protein tyrosine kinase 2(JAK2),signal transducer and activator of transcription 3(STAT3)in rat serum were measured by enzyme-linked immunosorbent assay(ELISA).Protein immunoblotting(WB)and real-time fluorescence quantitative PCR(RT-qPCR)were used to detect the expression levels of IL-6,JAK2,STAT3 protein and mRNA in biliary tree tissues.Results:①Compared with the blank group,the structures such as interlobular bile ducts in the hepatic sinusoids and portal duct area of the model rats were destroyed,and inflammatory cells infiltrated around them.The expression of ALT,AST,MDA,IL-6,JAK2 and STAT3 in the serum increased significantly,the expression level of SOD decreased,and the expression levels of IL-6,JAK2 and STAT3 proteins and mRNA increased.②Compared with the model group,the degree of liver pathological damage in rats in the Chiling Ning tablet group and the low and high concentration groups of Dahuang Lingxian Formula were improved,which could significantly reduce the expression levels of ALT,AST,MDA,IL-6,JAK2,STAT3 and up-regulate SOD in serum,and down-regulate the expression of IL-6,JAK2,STAT3 protein and mRNA,with the best effect in the high concentration group of Dahuang Lingxian Formula.③Compared with the choling tablet group,the rats in the low and high concentration groups of Dahuang Lingxian Formula tended to normalize the degree of liver pathological damage,without obvious inflammatory cell infiltration,and the expression levels of ALT,AST,MDA,IL-6,JAK2,STAT3 and the expression levels of IL-6,JAK2,STAT3 protein and mRNA in serum were reduced,and the expression levels of SOD were increased,with the best effect of Dahuang Lingxian Formula The treatment effect was best in the high concentration group.Conclusion:The mechanism may be related to the down-regulation of IL-6/JAK/STAT3 signaling pathway activation,and the best therapeutic effect was achieved by the high concentration group of Dahuang Lingxian Formula.
