The rapid degradation of Mg alloy was reduced by incorporating titanate on a fluorine-based anodized layer.The coating shows(i)excellent biomineralization ability,(ii)improved local and periodical corrosion behavior a...The rapid degradation of Mg alloy was reduced by incorporating titanate on a fluorine-based anodized layer.The coating shows(i)excellent biomineralization ability,(ii)improved local and periodical corrosion behavior and(iii)enhanced expression of osteogenic factors(Runx2,Col 1,OCN and OPN)along with(iv)the antibacterial property.The fluoride and magnesium ions dissolution from the anodized layer is responsible for the better expression of osteogenic factors and antibacterial behavior.The preparation of the titanate incorporated anodized Mg alloy(Ti-AMg)is a facile solution to overcome the implant-associated bacterial infections with required biological functions including progression of bone ingrowth and biocompatibility.展开更多
Aim Understanding the response of mesenchymal stem cells （MSCs） to mechanical strain and their consequent gene expression patterns will broaden our knowledge of the mechanobiology of distraction osteogenesis. Method...Aim Understanding the response of mesenchymal stem cells （MSCs） to mechanical strain and their consequent gene expression patterns will broaden our knowledge of the mechanobiology of distraction osteogenesis. Methodology In this study, a single period of cyclic mechanical stretch （0.5 Hz, 2,000 με） was performed on rat bone marrow MSCs. Cellular proliferation and alkaline phosphatase （ALP） activity was examined. The mRNA expression of six bone-related genes （Ets-1, bFGF, IGF-Ⅱ, TGF-β, Cbfal and ALP） was detected using real-time quantitative RT-PCR. Results The results showed that mechanical strain can promote MSCs proliferation, increase ALP activity, and up-regulate the expression of these genes. A significant increase in Ets-1 expression was detected immediately after mechanical stimulation, but Cbfal expression became elevated later. The temporal expression pattem of ALP coincided perfectly with Cbfal. Conclusion The results of this study suggest that mechanical strain may act as a stimulator to induce differentiation of MSCs into osteoblasts, and that these bone-related genes may play different roles in the response of MSCs to mechanical stimulation.展开更多
基金One of the authors K.Saranya is thankful to the Department of Science and Technology(DST),New Delhi,India for financial assistance under women scientist scheme(WOS-A)(Ref.No:SR/WOS-A/ET-17/2017).
文摘The rapid degradation of Mg alloy was reduced by incorporating titanate on a fluorine-based anodized layer.The coating shows(i)excellent biomineralization ability,(ii)improved local and periodical corrosion behavior and(iii)enhanced expression of osteogenic factors(Runx2,Col 1,OCN and OPN)along with(iv)the antibacterial property.The fluoride and magnesium ions dissolution from the anodized layer is responsible for the better expression of osteogenic factors and antibacterial behavior.The preparation of the titanate incorporated anodized Mg alloy(Ti-AMg)is a facile solution to overcome the implant-associated bacterial infections with required biological functions including progression of bone ingrowth and biocompatibility.
基金supported by grants from the National Nature Science Foundation of China (No. 30772454)Science and Technology Bureau of Sichuan Province (No. 2006z09-013)
文摘Aim Understanding the response of mesenchymal stem cells （MSCs） to mechanical strain and their consequent gene expression patterns will broaden our knowledge of the mechanobiology of distraction osteogenesis. Methodology In this study, a single period of cyclic mechanical stretch （0.5 Hz, 2,000 με） was performed on rat bone marrow MSCs. Cellular proliferation and alkaline phosphatase （ALP） activity was examined. The mRNA expression of six bone-related genes （Ets-1, bFGF, IGF-Ⅱ, TGF-β, Cbfal and ALP） was detected using real-time quantitative RT-PCR. Results The results showed that mechanical strain can promote MSCs proliferation, increase ALP activity, and up-regulate the expression of these genes. A significant increase in Ets-1 expression was detected immediately after mechanical stimulation, but Cbfal expression became elevated later. The temporal expression pattem of ALP coincided perfectly with Cbfal. Conclusion The results of this study suggest that mechanical strain may act as a stimulator to induce differentiation of MSCs into osteoblasts, and that these bone-related genes may play different roles in the response of MSCs to mechanical stimulation.
