Background Icafiine is a flavonoid isolated from a traditional Chinese medicine Epimedium pubescens and is the main active compound of it. Recently, Epimedium pubescens was found to have a therapeutic effect on osteop...Background Icafiine is a flavonoid isolated from a traditional Chinese medicine Epimedium pubescens and is the main active compound of it. Recently, Epimedium pubescens was found to have a therapeutic effect on osteoporosis. But the mechanism is unclear. The aim of the study was to research the effect of Icariine on the proliferation and differentiation of human osteoblasts. Methods Human osteoblasts were obtained by inducing human marrow mesenchymal stem cells （hMSCs） directionally and were cultured in the presence of vadous concentrations of Icariine. 3-（4,5-dimethylthiazol-2-yl）-2,5- diphenyltetrazolium bromide （MTT） test was used to observe the effect of Icariine on cell proliferation. The activity of alkaline phosphatase （ALP） and the amount of calcified nodules were assayed to observe the effect on cell differentiation. The expression of bone morphogenetic protein 2 （BMP-2） mRNA was detected by reverse transcriptase-polymerase chain reaction （RT-PCR）. Results Icadine （20 μg/ml） increased significantly the proliferation of human osteoblasts. And, IcarUne （10 μg/ml and 20 μg/ml） increased the activity of ALP and the amount of calcified nodules of human osteoblasts significantly （P〈0.05）. BMP-2 mRNA synthesis was elevated significantly in response to Icariine （20 μg/ml）. Conclusions Icadine has a direct stimulatory effect on the proliferation and differentiation of cultured human osteoblast cells in vitro, which may be mediated by increasing production of BMP-2 in osteoblasts.展开更多
目的观察不同浓度地黄梓醇对体外培养新生SD大鼠成骨细胞增殖及成骨活性的影响,为地黄防治骨质疏松症提供实验依据。方法体外培养原代新生24 h SD大鼠成骨细胞,细胞传至第5代,分别加入1×10-3,1×10-5,1×10-7,1×10-9m...目的观察不同浓度地黄梓醇对体外培养新生SD大鼠成骨细胞增殖及成骨活性的影响,为地黄防治骨质疏松症提供实验依据。方法体外培养原代新生24 h SD大鼠成骨细胞,细胞传至第5代,分别加入1×10-3,1×10-5,1×10-7,1×10-9mol/L梓醇溶液及生理盐水10μL/孔,继续培养24,48,72 h后,分别检测成骨细胞增殖情况、骨钙素(BGP)及碱性磷酸酶(ALP)活性。结果培养24 h时,1×10-3mol/L梓醇溶液能显著促进成骨细胞增殖(P<0.05);培养48 h时,1×10-3mol/L梓醇溶液促增殖作用最强(P<0.05)。培养48h时,1×10-7mol/L组和1×10-3mol/L组ALP活性显著高于对照组(P均<0.05);培养72 h时,1×10-3mol/L组ALP活性显著增加(P<0.05)。培养48,72 h后,各浓度梓醇溶液组BGP活性均高于对照组(P均<0.05),且1×10-3mol/L组明显高于其他浓度组(P均<0.05)。结论梓醇在1×10-5mol/L和1×10-3mol/L范围对体外培养SD大鼠成骨细胞的增殖、分化及成骨作用相对显著,尤其在1×10-3mol/L浓度下作用最显著,且具有时效及量效关系。展开更多
文摘Background Icafiine is a flavonoid isolated from a traditional Chinese medicine Epimedium pubescens and is the main active compound of it. Recently, Epimedium pubescens was found to have a therapeutic effect on osteoporosis. But the mechanism is unclear. The aim of the study was to research the effect of Icariine on the proliferation and differentiation of human osteoblasts. Methods Human osteoblasts were obtained by inducing human marrow mesenchymal stem cells （hMSCs） directionally and were cultured in the presence of vadous concentrations of Icariine. 3-（4,5-dimethylthiazol-2-yl）-2,5- diphenyltetrazolium bromide （MTT） test was used to observe the effect of Icariine on cell proliferation. The activity of alkaline phosphatase （ALP） and the amount of calcified nodules were assayed to observe the effect on cell differentiation. The expression of bone morphogenetic protein 2 （BMP-2） mRNA was detected by reverse transcriptase-polymerase chain reaction （RT-PCR）. Results Icadine （20 μg/ml） increased significantly the proliferation of human osteoblasts. And, IcarUne （10 μg/ml and 20 μg/ml） increased the activity of ALP and the amount of calcified nodules of human osteoblasts significantly （P〈0.05）. BMP-2 mRNA synthesis was elevated significantly in response to Icariine （20 μg/ml）. Conclusions Icadine has a direct stimulatory effect on the proliferation and differentiation of cultured human osteoblast cells in vitro, which may be mediated by increasing production of BMP-2 in osteoblasts.
