Title: Inhibiting effect of microRNA-101 over-expression on human U251 glioma cells
Abstract:Objective
To observe the effect of microRNA-101 (miR-101) over-expression on proliferation, apoptosis and cycle of human glioma cell line U251.
Methods
The human glioma cell line U251 was routi...Objective
To observe the effect of microRNA-101 (miR-101) over-expression on proliferation, apoptosis and cycle of human glioma cell line U251.
Methods
The human glioma cell line U251 was routinely cultured in vitro, and randomly divided into miR-101 group, negative control group and blank control group. Negative controls or miR-101 mimics were transfected into U25l cells by lipofectamine RNAiMAX in the cells from negative control group and miR-101 group. MiR-101 expression levels were detected by real-time fluorescence quantificative PCR 48 h after transfection. Cell viability was determined by cell counting kit-8 (CCK-8) 12, 24, 36, 48, 60 and 72 h after transfection. Flow cytometry was used to monitor the changes in cell apoptosis and cycle, and the protein expression levels of BCL-2 and P21 were detected by Western blotting 48 h after transfection.
Results
As compared with that in the negative control group and blank control group, miR-101 expression level in the miR-101 group was significantly up-regulated (P<0.05). The survival rate of cells from miR-101 group began to decrease 12 h after transfection, and was significantly lower than that of blank control group and negative control group 48 h after transfection (P<0.05). As compared with blank control and negative control groups, miR-101 group had significantly increased cell apoptosis rate ([13.73±2.60]% vs. [4.40±0.57]% and [4.23±0.44]%), significantly higher percentage of G0/G1 stage cells, statistically decreased stage S cells percentage, significantly decreased inhibitor of apoptosis protein BCL-2 expression and increased expression of key protein regulating cell cycle P21 (P<005).
Conclusion
Over-expression of miR-101 in U251 glioma cells can suppress proliferation, block cell cycle and induce apoptosis, and miR-101 may serve as a new potential target of treatment for glioma.
Key words:
Glioma; MicroRNA-101; Apoptosis; Cell cycleRead More
Publication Year: 2017
Publication Date: 2017-09-15
Language: en
Type: article
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