Objective To evaluate the effect of alendronate on osteoprotegerin(OPG)and receptor of activator of nuclear factor κB-ligand(RANKL)expression in human marrow stroma cells(hMSCs)in vitro.Methods hMSCs were isolated fr...Objective To evaluate the effect of alendronate on osteoprotegerin(OPG)and receptor of activator of nuclear factor κB-ligand(RANKL)expression in human marrow stroma cells(hMSCs)in vitro.Methods hMSCs were isolated from human marrow,cultured in vitro,and randomly divided into two groups:alendronate group,hMSCs culture fluid containing 1×10-7mol/L alendronate;control group,no special treatment but culturing hMSCs in DMEM.Two weeks after treatment,the expressions of OPG and RANKL were evaluated by RT-PCR and Western blot.Results hMSCs became uniform spindle-shaped fibroblasts.As cells proliferated,they formed colonies and showed whirlpool arrangement.After one week’s treatment,hMSCs in alendronate group had reduced processes and gradually showed disc shape,which did not happen in control group but kept fibroblast shape and just increased in density.In RT-PCR,the ratio of OPG/RANKL in alendronate group and control group was 8.77±1.16 and 4.58±1.27,respectively.In Western blot,the ratio of OPG/RANKL in alendronate group and control group was 2.58±0.47 and 1.52±0.32,respectively.The ratio of OPG/RANKL was higher in alendronate group than in control group(P<0.01).Conclusion Alendronate enhances OPG expression and inhibits RANKL expression of hMSCs in vitro.展开更多
目的:通过破骨细胞分化传导通路OPG-RANKL-RANK中的骨保护素(Osteoprotegrin,OPG)、破骨细胞分化因子(receptor activator of nuclear factor kappa B ligand,RANKL)蛋白及基因表达探讨运动防治骨质疏松的机理。方法:大鼠随机分为正常...目的:通过破骨细胞分化传导通路OPG-RANKL-RANK中的骨保护素(Osteoprotegrin,OPG)、破骨细胞分化因子(receptor activator of nuclear factor kappa B ligand,RANKL)蛋白及基因表达探讨运动防治骨质疏松的机理。方法:大鼠随机分为正常对照组、假手术组、模型组、阳性对照组和运动组。模型组、阳性对照组和运动组大鼠摘除双侧卵巢,假手术组切除小块脂肪组织。1个月后运动组进行中等强度运动;阳性对照组大鼠灌服已烯雌酚,正常对照组、假手术组、模型组和运动组大鼠灌服等容积蒸馏水。持续干预3个月后检测胫骨骨组织形态计量学指标,成骨细胞和骨髓基质细胞的OPG、RANKL蛋白及mRNA表达。结果:与模型组相比,阳性对照组和运动组骨小梁体积百分比(TBV%)、OPG蛋白及mRNA表达显著升高(P<0.05);骨小梁吸收表面百分比(TRS%)、骨小梁形成表面百分比(TFS%)、活性生成表面百分比(AFS%)、骨小梁矿化率(MAR)、骨小梁骨生成率(BFR)、类骨质平均宽度(OSW)、骨皮质矿化率(mAR)、成骨细胞/骨髓基质细胞(OB/MSC)RANKL蛋白及mRNA表达显著降低(P<0.05);模型组各指标与假手术组相比均有显著性差异(P<0.05)。结论:运动对去卵巢大鼠骨组织形态计量相关指标有一定的改善作用,对破骨细胞分化传导通路OPGRANKL-RANK中的OPG、RANKL蛋白及基因表达有一定调节作用,并对去卵巢所致大鼠骨质疏松症有一定的防治作用。展开更多
Objective To investigate the relationship between body mass index(BMI)and osteoporosis using Mendelian randomization analysis.Methods The genetic variation strongly related to BMI was selected as the instrumental vari...Objective To investigate the relationship between body mass index(BMI)and osteoporosis using Mendelian randomization analysis.Methods The genetic variation strongly related to BMI was selected as the instrumental variables in the collection data set of the genome-wide association study(GWAS).The MR-Egger regression,weighted median estimator(WME),inverse variance weighted(IVW),simple mode and weighted mode were used for Mendelian randomization(MR)analysis.The causal association between BMI and osteoporosis was evaluated by odds ratio and 95%confidence interval.The MR-APSS method was applied to make the causal inference results based on MRRmore reliable.The Linkage disequilibrium score regression was applied to evaluate the genetic correlation,and the horizontal pleiotropy test,heterogeneity test,and leave-one-out method were used to evaluate whether the results were reliable.展开更多
基金supported by the National Natural Science Foundation of China(No.30600624)
文摘Objective To evaluate the effect of alendronate on osteoprotegerin(OPG)and receptor of activator of nuclear factor κB-ligand(RANKL)expression in human marrow stroma cells(hMSCs)in vitro.Methods hMSCs were isolated from human marrow,cultured in vitro,and randomly divided into two groups:alendronate group,hMSCs culture fluid containing 1×10-7mol/L alendronate;control group,no special treatment but culturing hMSCs in DMEM.Two weeks after treatment,the expressions of OPG and RANKL were evaluated by RT-PCR and Western blot.Results hMSCs became uniform spindle-shaped fibroblasts.As cells proliferated,they formed colonies and showed whirlpool arrangement.After one week’s treatment,hMSCs in alendronate group had reduced processes and gradually showed disc shape,which did not happen in control group but kept fibroblast shape and just increased in density.In RT-PCR,the ratio of OPG/RANKL in alendronate group and control group was 8.77±1.16 and 4.58±1.27,respectively.In Western blot,the ratio of OPG/RANKL in alendronate group and control group was 2.58±0.47 and 1.52±0.32,respectively.The ratio of OPG/RANKL was higher in alendronate group than in control group(P<0.01).Conclusion Alendronate enhances OPG expression and inhibits RANKL expression of hMSCs in vitro.
文摘目的:通过破骨细胞分化传导通路OPG-RANKL-RANK中的骨保护素(Osteoprotegrin,OPG)、破骨细胞分化因子(receptor activator of nuclear factor kappa B ligand,RANKL)蛋白及基因表达探讨运动防治骨质疏松的机理。方法:大鼠随机分为正常对照组、假手术组、模型组、阳性对照组和运动组。模型组、阳性对照组和运动组大鼠摘除双侧卵巢,假手术组切除小块脂肪组织。1个月后运动组进行中等强度运动;阳性对照组大鼠灌服已烯雌酚,正常对照组、假手术组、模型组和运动组大鼠灌服等容积蒸馏水。持续干预3个月后检测胫骨骨组织形态计量学指标,成骨细胞和骨髓基质细胞的OPG、RANKL蛋白及mRNA表达。结果:与模型组相比,阳性对照组和运动组骨小梁体积百分比(TBV%)、OPG蛋白及mRNA表达显著升高(P<0.05);骨小梁吸收表面百分比(TRS%)、骨小梁形成表面百分比(TFS%)、活性生成表面百分比(AFS%)、骨小梁矿化率(MAR)、骨小梁骨生成率(BFR)、类骨质平均宽度(OSW)、骨皮质矿化率(mAR)、成骨细胞/骨髓基质细胞(OB/MSC)RANKL蛋白及mRNA表达显著降低(P<0.05);模型组各指标与假手术组相比均有显著性差异(P<0.05)。结论:运动对去卵巢大鼠骨组织形态计量相关指标有一定的改善作用,对破骨细胞分化传导通路OPGRANKL-RANK中的OPG、RANKL蛋白及基因表达有一定调节作用,并对去卵巢所致大鼠骨质疏松症有一定的防治作用。
文摘Objective To investigate the relationship between body mass index(BMI)and osteoporosis using Mendelian randomization analysis.Methods The genetic variation strongly related to BMI was selected as the instrumental variables in the collection data set of the genome-wide association study(GWAS).The MR-Egger regression,weighted median estimator(WME),inverse variance weighted(IVW),simple mode and weighted mode were used for Mendelian randomization(MR)analysis.The causal association between BMI and osteoporosis was evaluated by odds ratio and 95%confidence interval.The MR-APSS method was applied to make the causal inference results based on MRRmore reliable.The Linkage disequilibrium score regression was applied to evaluate the genetic correlation,and the horizontal pleiotropy test,heterogeneity test,and leave-one-out method were used to evaluate whether the results were reliable.
