Journal
HUMAN CELL
Volume 35, Issue 1, Pages 133-149Publisher
SPRINGER JAPAN KK
DOI: 10.1007/s13577-021-00629-6
Keywords
Fracture healing; Long noncoding RNA XIST; microRNA-135; CREB1; TNF-alpha/RANKL pathway; Osteoblast-like cells
Categories
Funding
- National Natural Science Foundation of China [81774348, 81874477]
Ask authors/readers for more resources
This study demonstrated that XIST promotes osteoblast differentiation through the regulation of the miR-135/CREB1/TNF-alpha/RANKL axis, while XIST knockdown inhibits proliferation and differentiation of osteoblast-like cells.
Fracture healing is a complex event with the involvement of many cell systems, cytokines, as well as mRNAs. Herein, we report the interactions among long noncoding RNA X-inactive specific transcript (XIST)/microRNA-135 (miR-135)/cAMP response element-binding protein 1 (CREB1) axis during fracture healing. We observed increased expression of XIST in patients with long-term unhealed fracture by microarray analysis. Subsequently, a mouse model with tibial fracture and a cell model using osteoblast-like MC3T3-E1 cells were generated. The XIST overexpression during fracture healing decreased proliferation and differentiation of MC3T3-E1 cells, while silencing of XIST facilitated MC3T3-E1 cell growth. Furthermore, miR-135 targeted CREB1 and negatively regulated its expression. XIST acted as a sponge for miR-135, thereby upregulating CREB1 and promoting the activity of the TNF-alpha/RANKL pathway. Transfection of miR-135 inhibitor or CREB1 overexpression blocked the stimulating effects of XIST knockdown on MC3T3-E1 cell growth. Besides, specific inhibitors of the TNF-alpha/RANKL pathway reversed the repressive role of XIST in cell osteogenic differentiation. All in all, these findings suggest that XIST knockdown induces the differentiation of osteoblast-like cells via regulation of the miR-135/CREB1/TNF-alpha/RANKL axis. XIST, as a consequence, represents an attractive therapeutic strategy to accelerate fracture healing.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available