Systemic lupus erythematosus (SLE) involves multiple factors, which result in the breakdown of self-tolerance and development of autoimmunity with organ damage. Bone marrow mesenchymal stem cells (BMMSCs) from the patients with SLE showed an impaired proliferative capacity compared with that from normal controls. In this study, we isolated BMMSCs from the patients with SLE and found that Vitamin D analog EB1089 could induce BMMSCs proliferation and mineralization deposition. Furthermore, we found that the expression of p-Smad 1/5/8 was promoted in BMMSCs with EB1089 treatment. In conclusion, our results support the notion that EB1089 promoted proliferation and osteogenic differentiation of BMMSCs by Smad 1/5/8 signaling pathway.
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