MicroRNA-9 regulates osteoblast differentiation and angiogenesis via the AMPK signaling pathway

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• 作者：Jining Qu ; Daigang Lu ; Hua Guo ; Wusheng Miao ; Ge Wu…
• 关键词：MicroRNA ; 9 ; Bone repair ; Osteoblast differentiation ; Angiogenesis ; AMPK
• 刊名：Molecular and Cellular Biochemistry
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：411
• 期：1-2
• 页码：23-33
• 全文大小：1,376 KB
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• 作者单位：Jining Qu (1)
  Daigang Lu (2)
  Hua Guo (3)
  Wusheng Miao (1)
  Ge Wu (1)
  Meifen Zhou (1)
  
  1. Department of Pediatric Orthopedics, Honghui Hospital, Xi’an Jiaotong University Health Science Center, Xi’an, 710054, China
  2. Department of Trauma, Honghui Hospital, Xi’an Jiaotong University Health Science Center, Xi’an, 710054, China
  3. Department of Emergency, Honghui Hospital, Xi’an Jiaotong University Health Science Center, Xi’an, 710054, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Biochemistry
  Medical Biochemistry
  Oncology
  Cardiology
  
• 出版者：Springer Netherlands
• ISSN：1573-4919

文摘

MiR-9 has been found to be involved in the repair of spinal cord injury and regulates the proliferation and differentiation of mesenchymal stem cells. However, the role of miR-9 in repair of bone defects has not been well studied. The current study was designed to investigate its role and potential underlying mechanism in regulating osteoblast differentiation and angiogenesis. After treating the murine pre-osteoblast cell line MC3T3-E1 with BMP2, miR-9 expression was obviously down-regulated. Following transfection with miR-9 mimics, its overexpression enhanced the differentiation of MC3T3-E1 cells into osteoblasts as evidence that miR-9 up-regulated the mRNA levels of osteoblast differentiation-related protein, as well as increased differentiation and mineralization of osteoblasts. Further functional analysis has shown that miR-9 overexpression effectively increased human umbilical vein endothelial cell proliferation. Moreover, miR-9 up-regulation promoted cell migration, VEGF, and VE-cadherin concentrations, as well as tube formation in vitro. The mechanistic assay demonstrated that overexpression of miR-9-induced activation of the AMPK signaling pathway. Taken together, our findings suggested that miR-9 overexpression promoted osteoblast differentiation and angiogenesis via the AMPK signaling pathway, representing a novel and potential therapeutic target for the treatment of bone injury-related diseases. Keywords MicroRNA-9 Bone repair Osteoblast differentiation Angiogenesis AMPK