- 作者: Xing Shen, Bo Pan, Huiming Zhou, Lingjuan Liu, Tiewei Lv, Jing Zhu, Xupei Huang and Jie Tian
- 作者服務機構: 1. Department of Cardiology, Heart Centre, The Children’s Hospital of Chongqing Medical University, 136 Zhongshan Er Road, Chongqing 400014, Yu Zhong District, China 2. Department of Pediatrics, the Affiliated Hospital of Southwest Medical University
- 中文摘要:
- 英文摘要:
Background
Bone marrow derived stem cells (BMSCs) have the potential to differentiate into cardiomyocytes, but the rate of differentiation is low and the mechanism of differentiation is unclear completely. Here, we aimed to investigate the role of miR1-2 in differentiation of mouse BMSCs into cardiomyocyte-like cells and reveal the involved signaling pathways in the procedure.
Methods
Mouse BMSCs were treated with miR1-2 and 5-azacytine (5-aza). The expression of cardiac cell markers: NKx2.5, cTnI and GATA4 in BMSCs were examined by qPCR. The apoptosis rate was detected by flow cytometry and the activity of the Wnt/β-catenin signaling pathway was evaluated by measuring the upstream protein of this signaling pathway.
Results
After over-expression of miR1-2 in mouse BMSCs, the apoptosis rate was significantly lower than the 5-aza group, while the expressions of cardiac-specific genes: such as Nkx2.5, cTnI and GATA4 were significantly increased compared to the control group and the 5-aza group. Meanwhile, over-expression of miR1-2 in mouse BMSCs enhanced the expression of wnt11, JNK, β-catenin and TCF in the Wnt/β-catenin signaling pathway. Use of LGK-974, an inhibitor of Wnt/β-catenin signaling pathway, significantly reduced the expression of cardiac-specific genes and partially blocked the role of the miR1-2.
Conclusion
Over-expression of miR1-2 in mouse BMSCs can induce them toward promoted cardiomyocyte differentiation via the activation of the Wnt/β-catenin signaling pathway. Compared to 5-aza, miR1-2 can induce differentiation of BMSCs into cardiomyocytes more effectively with a less cytotoxicity. - 中文關鍵字:
- 英文關鍵字: miR1-2, Mesenchymal stem cells, Cardiomyocyte differentiation, Wnt/β-catenin signaling pathway