MicroRNA-124 suppresses the migration and invasion of osteosarcoma cells via targeting ROR2-mediated non-canonical Wnt signaling Retraction in /10.3892/or.2021.8107

Zhang,Can; Hu,Yihe; Wan,Jun; He,Hongbo

doi:10.3892/or.2015.4186

MicroRNA-124 suppresses the migration and invasion of osteosarcoma cells via targeting ROR2-mediated non-canonical Wnt signaling

Retraction in: /10.3892/or.2021.8107

Authors:
- Can Zhang
- Yihe Hu
- Jun Wan
- Hongbo He
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Affiliations: Department of Orthopaedics, Xiangya Hospital of Central South University, Changsha, Hunan 410008, P.R. China
Published online on: August 10, 2015 https://doi.org/10.3892/or.2015.4186
Pages: 2195-2201

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Abstract

MicroRNAs (miRs) have been implicated in tumorigenesis through inhibition of the expression of their target genes at post-transcriptional levels. miR-124 has been found to be downregulated in many malignant tumors including osteosarcoma (OS). However, the detailed mechanism of miR-124 in the regulation of OS malignant phenotypes remains largely unclear. Here we aimed to explore the role of miR-124 in mediating OS cell migration and invasion, as well as the underlying regulatory mechanisms. Real-time RT-PCR data showed that miR-124 was frequently downregulated in OS cell lines compared to normal human osteoblast cells. We further conducted bioinformatic analysis and a luciferase reporter assay, and identified receptor tyrosine kinase-like orphan receptor 2 (ROR2) as a novel target of miR-124. Furthermore, we found that ROR2 was significantly upregulated in OS cell lines compared to normal human osteoblast cells, and miR-124 negatively mediated the protein level of ROR2 in U-2OS and Saos-2 cells. Moreover, transfection with miR-124 mimics significantly suppressed migration and invasion in the U-2OS and Saos-2 cells, while overexpression of ROR2 in the miR-124-transfected OS cells reversed the inhibitory effect of miR-124 upregulation on OS cell migration and invasion. In addition, we found that overexpression of miR-124 significantly suppressed the activity of non-canonical Wnt signaling, downstream of ROR2. Based on these findings, we suggest that miR-124 may inhibit OS metastasis, partly at least, via targeting ROR2 and thus suppressing the activity of ROR2-mediated non-canonical Wnt signaling.

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