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[Effects of HMGB1 on Proliferation and Secretion of Human Bone Marrow Mesenchymal Stem Cells]. | LitMetric
Objective : To investigate the effect of high mobility group protein 1(HMGB1) on the proliferation and cytokine expression of human bone marrow mesenchymal stem cells (MSC).Methods : Different concentrations of recombinant human HMGB1 protein (100, 200, 400, 800 and 1000 ng/ml) were incubated with MSC for 24, 48, 72 h and the proliferation of MSC were detected respectively by using the CCK-8 method and flow cytometry. The best concentrations of HMGB1 incubated with MSC was determined (200 ng/ml, 1000 ng/ml), and the flow cytomerty was used to determine the effect of HMGB1 on the proliferation of MSC. The mRNA expression levels of IL-10, TGF- β1, TSG-6 and IFN-γ in MSC incubated with HMGB1 protein were detected by real-time quantitative PCR and ELISA.Results : The result of MSC identification and flow cytometry showed that the CD105, CD73 and CD90 were expressed, but did not expression CD45, CD34, CD11b, CD19 and HLA-DR; CCK-8 showed that HMGB1 at the concentrations of 100 ng/ml, 200 ng/ml and 400 ng/ml could promote the proliferation of MSC incubated for 24, 48 and 72 h as compared with the control group (P<0.05), and the most effective concentration was 200 ng/ml; flow cytometry showed that the compared with the control group, HMGB1 200 ng/ml could induce MSC from G1 phase to S phase to promote the proliferation of MSC; QPCR showed that the mRNA expression of MSC cytokines IL-10, TGF-β1, TSG-6 increased while IFN-γ decreased at the concentration of 200 ng/ml HMGB1 as compared with the control group. ELISA experiments showed that the HMGB1 200 ng/ml acting on MSC for 48 h could significantly promoted the secretion of IL-10, TGF-β 1 and TSG-6(P<0．05), while IFN-γ showed no significant difference as compared with control group.Conclusion : Recombinant human HMGB1 can promote the proliferation and secretion of MSC in healthy people.
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