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OBJECTIVE: To explore whether Ipriflavone could prevent postmenopausal osteoporosis (PMOP) and improve bone quality via promoting osteogenesis of bone marrow-derived mesenchymal stem cell (MSCs). @@@ MATERIALS AND METHODS: MSCs were extracted from rats and Identified using flow cytometry. Osteogenic specific genes and adipogenic specific genes in MSCs were detected by quantitative Real-time polymerase chain reaction (qRT-PCR). The effect of Ipriflavone on osteogenesis was detected by CCK-8 (cell counting kit-8) assay, ALP activity detection, alizarin red staining and Western blot, respectively. Furthermore, ovariectomized PMOP rat model was constructed. The effects of Ipriflavone on osteogenesis, BMD and bone biomechanical properties of ovariectomized rats were detected. @@@ RESULTS: MSCs derived from ovariectomized rats exerted multiple differentiation potentials. CCK-8 assay indicated that 0.8 pM Ipriflavone were the maximal dose that did not affect MSCs proliferation, which was selected for the following experiments. In vitro researches demonstrated that Ipriflavone remarkably promoted MSCs osteogenesis. In vivo results indicated that BMD, BV/TV, Tb.N and Tb.Th were decreased in ovariectomized rats than those of rats in sham group. Ipriflavone treatment remarkably prevented osteoporosis via promoting MSCs osteogenesis in ovariectomized rats. @@@ CONCLUSIONS: Ipriflavone prevents postmenopausal osteoporosis, improves bone quality and protects bone tissue via promoting MSCs osteogenesis.
