Abstract:
:Bone marrow mesenchymal stem cells (BMMSCs) provide the biological basis for bone reconstruction. Mechanical tension stimulation as a potent modulator is able to promote osteogenic capability of BMMSCs. Long non-coding RNAs (LncRNAs) as competing endogenous RNAs (ceRNAs) for microRNAs, are postulated to regulate the osteogenic differentiation of stem cells. However, the mechanism how (whether) lncRNAs mediates tension-induced osteogenesis of BMSCs still remains poor understood. Here, human BMMSCs (hBMMSCs) were subjected to mechanical tension (10%, 0.5Hz). Results showed that mechanical tension could enhance osteogenic differentiation and increase H19 expression. H19 deficiency suppressed tension-induced osteogenic differentiation, demonstrating that H19 could mediate tension-induced osteogenesis in hBMMSCs. Besides, mechanical tension could suppress miR-138 expression, and down-regulated miR-138 promoted tension-induced osteogenesis in hBMMSCs. Luciferase reporter assays illustrated that H19 had binding sites with miR-138, and H19 deficiency increased miR-138 level, demonstrating that H19 may act as a ceRNA for miR-138 in hBMMSCs. Luciferase reporter assays also showed that miR-138 could target PTK2,a gene encoding focal adhesion kinase (FAK). Up-regulated miR-138 impaired increased FAK expression induced by mechanical tension. The relationship among H19, miR-138 and FAK under tension condition was further studied. H19 deficiency inhibited FAK expression, which could be partly rescued by knock-downing miR-138. In addition, suppressed tension-induced osteogenic differentiation in H19 defective cells was partly rescued by miR-138 knockdown. Taken together, this study indicated that H19 is a positive regulator in tension-induced osteogenesis of hBMMSCs through acting as a ceRNA for miR-138 and then up-regulating downstream FAK.
journal_name
Bonejournal_title
Boneauthors
Wu J,Zhao J,Sun L,Pan Y,Wang H,Zhang WBdoi
10.1016/j.bone.2017.12.013subject
Has Abstractpub_date
2018-03-01 00:00:00pages
62-70eissn
8756-3282issn
1873-2763pii
S8756-3282(17)30469-6journal_volume
108pub_type
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