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- W2351823629 abstract "AIM:To investigate the process of human bone marrow stromal cells (hBMSCs) differentiation into neural-like cells and to determine the role of 26S proteasome in neuronal differentiation. METHODS:Purified hBMSCs were treated with β-mercaptoethanol (β-ME) for 1 day and retinoic acid (RA) for 3 days,followed by growth factor (10 μg/L bFGF or 20 μg/L NGF) for another 3 days. Immunofluorescence was performed to detect the expression of nestin (a neural precursor cells marker),Tuj1 (a premature neuronal marker),and neurofilament (NF,a mature neuronal marker) at all stages of induced differentiation. Immunostaining and RT-PCR were used to analyze the expression of 26S proteasome during neuronal differentiation of hBMSCs. To further confirm the role of 26S proteasome in hBMSCs differentiation,cells were treated with β-ME/RA and then followed by protesome inhibitor MG132 and growth factor. Immunostaining was performed to detect NF-positive cells. RESULTS:Quantification results showed that the untreated cells were almost never positive for nestin,Tuj1 and NF. After treated with β-ME/RA,the numbers of nestin-positive cells (34.41%±1.27%) and Tuj1-positive cells (27.79%±1.27%) were increased. Notably,the numbers of NF-positive cells were significantly increased to 56.72%±2.4% after induction with β-ME/RA/GF. Immunofluorescence analysis showed that undifferentiated hBMSCs cells were weakly stained by antibody against 26S proteasome,but the numbers of cells with high-intensity of 26S proteasome were increased after treated with β-ME/RA. The RT-PCR result of 26S proteasome further confirmed that the mRNA level of the cells differentiated by β-ME/RA (1.33),as well as by β-ME/RA/GF (1.77),was significantly increased compared to the undifferentiated cells. Moreover,hBMSCs incubated with protesome inhibitor MG132 significantly decreased the numbers of NF-positive cells (37.59%±1.52%). CONCLUSION:After induction with β-ME/RA/GF,hBMSCs can be differentiated into neural-like cells,which is concomitant with the increase in 26S proteasome expression. Inhibitor of 26S protesome prevents hBMSCs differentiation,suggesting that 26S proteasome may be involved in the differentiation of hBMSCs into neural-like cells." @default.
- W2351823629 created "2016-06-24" @default.
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- W2351823629 date "2010-01-01" @default.
- W2351823629 modified "2023-09-24" @default.
- W2351823629 title "26S proteasome regulates differentiation of human bone marrow stromal cells into neural-like cells" @default.
- W2351823629 hasPublicationYear "2010" @default.
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