In order to clarify the mechanism of action of licorice flavonoids in alleviating bone loss caused by osteoporosis,this study compared the effects of four glycyrrhiza flavonoids,naringenin,liquiritigenin,isoliquiritig...In order to clarify the mechanism of action of licorice flavonoids in alleviating bone loss caused by osteoporosis,this study compared the effects of four glycyrrhiza flavonoids,naringenin,liquiritigenin,isoliquiritigenin,and licochalcone A,on osteogenic differentiation and mineralization by molecular docking simulation,alkaline phosphatase(ALP)activity and osteocalcin(OCN)content assays,and Runt-related transcription factor 2(Runx2)expression,and explored their potential molecular mechanisms.The results of molecular docking showed that the docking score of liquiritigenin with the estrogen receptor(ER)was the highest.All four flavonoids up-regulated ALP activity and OCN concentration in MC3T3-E1 cells,thereby elevating the mineralization level,among which liquiritigenin was the most effective.Moreover,treatment with a phosphatidylinositol-3-kinase(PI3K)inhibitor(LY294002)inhibited liquiritigenin from inducing increased phosphorylation levels in the PI3K/protein kinase B(AKT)signaling pathway and up-regulation of Runx2 expression,suggesting that PI3K and AKT were involved in osteogenic action.Liquiritigenin reversed bone mineral density loss in a zebrafish osteoporosis model.These findings suggest that liquiritigenin has the most significant osteogenic effect among the four estrogen-like flavonoids,stimulating osteoblast differentiation and bone mineralization through the activation of Runx2 via the PI3K/AKT signaling pathways.In conclusion,this study highlights the great potential of liquiritigenin for preventing and treating osteoporosis.展开更多
目的:探讨芪蛭降糖胶囊(QJ)对糖尿病大鼠胰岛素抵抗(IR)的作用,阐明其药物作用的分子药理机制。方法:100只Wistar大鼠采用高脂饮食联合注射链脲佐菌素(STZ)的方法复制2型糖尿病大鼠模型。将建模成功大鼠随机分为模型组(DM),参芪降糖颗...目的:探讨芪蛭降糖胶囊(QJ)对糖尿病大鼠胰岛素抵抗(IR)的作用,阐明其药物作用的分子药理机制。方法:100只Wistar大鼠采用高脂饮食联合注射链脲佐菌素(STZ)的方法复制2型糖尿病大鼠模型。将建模成功大鼠随机分为模型组(DM),参芪降糖颗粒阳性对照组(SQ),芪蛭降糖胶囊低(QJL)、中(QJM)和高剂量组(QJH),同时设立正常对照组(NC)。芪蛭降糖胶囊低、中和高剂量组药物浓度分别为0.34、0.68和1.35g·kg-1;参芪降糖颗粒药物浓度为0.27g·kg-1。大鼠建模成功后,给予相应浓度药物干预治疗8周。经药物干预后,应用血糖检测仪及全自动生化分析仪测定大鼠空腹血糖(FBG)、空腹胰岛素(FINS)、胰岛素抵抗指数(IRI)和脂质代谢相关生化指标,Real Time PCR法测定肝脏组织中胰岛素受体底物1(IRS-1)、磷脂酰肌醇-3激酶(PI3K)和葡萄糖转运体4(GLUT4)基因的mRNA表达水平,ELISA法测定血清肿瘤坏死因子α(TNF-α)和脂联素(ADPN)水平。结果:与正常对照组比较,模型组大鼠FBG、FINS和IRI显著升高(P<0.05或P<0.01);血清总胆固醇(TC)、甘油三酯(TG)和低密度脂蛋白(LDL)水平显著升高(P<0.05),血清高密度脂蛋白(HDL)水平显著降低(P<0.05);肝脏组织中IRS-1、PI3K和GLUT4基因的mRNA表达水平显著下降(P<0.05),血清TNF-α水平显著升高(P<0.05),血清ADPN水平显著降低(P<0.05)。与模型组比较,芪蛭降糖胶囊低、中、高剂量组及参芪降糖颗粒阳性对照组大鼠FBG和IRI显著降低(P<0.01);芪蛭降糖胶囊中、高剂量组及参芪降糖颗粒阳性对照组FINS显著降低(P<0.05);芪蛭降糖胶囊中剂量组及参芪降糖颗粒阳性对照组血清TC、TG和LDL水平显著降低(P<0.05或P<0.01),HDL水平显著升高(P<0.05);肝脏组织中IRS-1、PI3K和GLUT4基因的mRNA表达水平显著上调(P<0.05);芪蛭降糖胶囊中、高剂量组及参芪降糖颗粒阳性对照组血清TNF-α水平显著降低(P<0.05),血清ADPN水平显著升高(P<0.05)。结论:芪蛭降糖胶囊具有改善糖尿病大鼠IR的作用,其作用机制与改善糖脂代谢、影响胰岛素信号传导通路有关。展开更多
文摘In order to clarify the mechanism of action of licorice flavonoids in alleviating bone loss caused by osteoporosis,this study compared the effects of four glycyrrhiza flavonoids,naringenin,liquiritigenin,isoliquiritigenin,and licochalcone A,on osteogenic differentiation and mineralization by molecular docking simulation,alkaline phosphatase(ALP)activity and osteocalcin(OCN)content assays,and Runt-related transcription factor 2(Runx2)expression,and explored their potential molecular mechanisms.The results of molecular docking showed that the docking score of liquiritigenin with the estrogen receptor(ER)was the highest.All four flavonoids up-regulated ALP activity and OCN concentration in MC3T3-E1 cells,thereby elevating the mineralization level,among which liquiritigenin was the most effective.Moreover,treatment with a phosphatidylinositol-3-kinase(PI3K)inhibitor(LY294002)inhibited liquiritigenin from inducing increased phosphorylation levels in the PI3K/protein kinase B(AKT)signaling pathway and up-regulation of Runx2 expression,suggesting that PI3K and AKT were involved in osteogenic action.Liquiritigenin reversed bone mineral density loss in a zebrafish osteoporosis model.These findings suggest that liquiritigenin has the most significant osteogenic effect among the four estrogen-like flavonoids,stimulating osteoblast differentiation and bone mineralization through the activation of Runx2 via the PI3K/AKT signaling pathways.In conclusion,this study highlights the great potential of liquiritigenin for preventing and treating osteoporosis.
文摘目的:探讨芪蛭降糖胶囊(QJ)对糖尿病大鼠胰岛素抵抗(IR)的作用,阐明其药物作用的分子药理机制。方法:100只Wistar大鼠采用高脂饮食联合注射链脲佐菌素(STZ)的方法复制2型糖尿病大鼠模型。将建模成功大鼠随机分为模型组(DM),参芪降糖颗粒阳性对照组(SQ),芪蛭降糖胶囊低(QJL)、中(QJM)和高剂量组(QJH),同时设立正常对照组(NC)。芪蛭降糖胶囊低、中和高剂量组药物浓度分别为0.34、0.68和1.35g·kg-1;参芪降糖颗粒药物浓度为0.27g·kg-1。大鼠建模成功后,给予相应浓度药物干预治疗8周。经药物干预后,应用血糖检测仪及全自动生化分析仪测定大鼠空腹血糖(FBG)、空腹胰岛素(FINS)、胰岛素抵抗指数(IRI)和脂质代谢相关生化指标,Real Time PCR法测定肝脏组织中胰岛素受体底物1(IRS-1)、磷脂酰肌醇-3激酶(PI3K)和葡萄糖转运体4(GLUT4)基因的mRNA表达水平,ELISA法测定血清肿瘤坏死因子α(TNF-α)和脂联素(ADPN)水平。结果:与正常对照组比较,模型组大鼠FBG、FINS和IRI显著升高(P<0.05或P<0.01);血清总胆固醇(TC)、甘油三酯(TG)和低密度脂蛋白(LDL)水平显著升高(P<0.05),血清高密度脂蛋白(HDL)水平显著降低(P<0.05);肝脏组织中IRS-1、PI3K和GLUT4基因的mRNA表达水平显著下降(P<0.05),血清TNF-α水平显著升高(P<0.05),血清ADPN水平显著降低(P<0.05)。与模型组比较,芪蛭降糖胶囊低、中、高剂量组及参芪降糖颗粒阳性对照组大鼠FBG和IRI显著降低(P<0.01);芪蛭降糖胶囊中、高剂量组及参芪降糖颗粒阳性对照组FINS显著降低(P<0.05);芪蛭降糖胶囊中剂量组及参芪降糖颗粒阳性对照组血清TC、TG和LDL水平显著降低(P<0.05或P<0.01),HDL水平显著升高(P<0.05);肝脏组织中IRS-1、PI3K和GLUT4基因的mRNA表达水平显著上调(P<0.05);芪蛭降糖胶囊中、高剂量组及参芪降糖颗粒阳性对照组血清TNF-α水平显著降低(P<0.05),血清ADPN水平显著升高(P<0.05)。结论:芪蛭降糖胶囊具有改善糖尿病大鼠IR的作用,其作用机制与改善糖脂代谢、影响胰岛素信号传导通路有关。
