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- W2895828195 abstract "Abstract The purpose of this study was to investigate the underlying molecular mechanisms of fracture healing mediated by bone marrow mesenchymal stem cells. Differentially expressed microRNAs in acutely injured subjects and healthy volunteers were screened by microarray analysis. The dual luciferase reporter system was used to verify whether insulin‐like growth factor 1 (IGF1) was the direct target gene regulated by miR‐148a. The expression level of miR‐148a and IGF1 after osteogenic differentiation was detected by quantitative real‐time polymerase chain reaction. Western blot was used to determine the protein expression of bone markers, including IGF1, runt‐related transcription factor 2 (Runx2), osteocalcin, and osteopontin in rat bone marrow–derived mesenchymal stem cells. Alkaline phosphatase and alizarin red staining was used to detect alkaline phosphatase activity and calcium deposition. An animal fracture model was used for in vivo experiments. MiR‐148a was highly expressed in acutely injured subjects compared with healthy volunteers, and IGF1 was a target of miR‐148a. Moreover, compared with the negative control group, IGF1 messenger RNA expression was significantly increased in the miR‐148a antagomir group. During osteogenic differentiation, the expression of IGF1, Runx2, osteocalcin, and osteopontin was higher in the miR‐148a antagomir group than other groups. In vivo experiments further confirmed that upregulation of IGF1 enhanced fracture healing efficiently by decreasing callus width and area and improving bone mineral density, maximum load, stiffness, and energy absorption. It was proved that IGF1 was the direct target gene of miR‐148a, and the use of rat bone marrow–derived mesenchymal stem cells with low expression of miR‐148a could improve fracture healing by upregulating IGF1." @default.
- W2895828195 created "2018-10-26" @default.
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- W2895828195 date "2018-10-18" @default.
- W2895828195 modified "2023-09-30" @default.
- W2895828195 title "MiR‐148a regulates bone marrow mesenchymal stem cells‐mediated fracture healing by targeting insulin‐like growth factor 1" @default.
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- W2895828195 doi "https://doi.org/10.1002/jcb.27121" @default.
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