Abstract
BackgroundThe osteoblast differentiation of bone marrow-derived stem cells (BMSCs) is impaired in multiple myeloma (MM). We investigated the effects of sodium copper chlorophyllin (SCC) on osteoblast differentiation ability of BMSCs from MM. MethodsClinical bone marrow samples were collected. Fluorescence Activated Cell Sorter (FACS) was used to identify surface markers of BMSCs. BMSCs were treated with different concentrations of SCC and cell viability was detected by MTT assay. Relative mRNA and protein expressions of transforming growth factor-β1 (TGF-β1), SMAD2/3, osteogenic differentiation indicators (RUNX2 and OCN) were measured by quantitative real-time polymerase chain reaction (qRT-PCR) and Western blot. Alkaline phosphatase (ALP) was stained for activity detection. Formation of calcium nodus of BMSCs was examined by Alizarin Red S staining. ResultsCD90 and CD105 were high-expressed, but CD34 and CD45 were not expressed in BMSCs. BMSCs in MM group showed a lower expression of TGF-β1 and a lower degree of osteogenic differentiation. SCC enhanced activities of BMSCs, ALP activity, and formation of calcium nodus, activated TGF-β1, SMAD2/3 pathway and increased RUNX2 and OCN expressions in BMSCs. Silencing TGF-β1 reversed the effects of SCC on BMSCs in MM. ConclusionSCC could effectively improve the proliferation and osteogenic differentiation of BMSCs in MM through regulating TGF-β1.
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