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An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells
Published on: May 20, 2019
MicroRNA-210 promotes proliferation and invasion of peripheral nerve sheath tumor cells targeting EFNA3
Zhengguang Wang1, Bangliang Yin, Bing Wang
1Department of Spine Surgery, The Second Xiangya Hospital of Central South University, Changsha, China.
Abstract:
MicroRNA (miR) plays an important role in tumorigenesis including malignant peripheral nerve sheath tumor (MPNST). miR-210 downregulation is frequently observed in a variety of tumors. In this study, miR-210 was identified as downregulated in MPNST cells, and its potential target ephrin-A3 (EFNA3) was upregulated in them compared with neurofibroma cells using quantitative real-time (qRT)-PCR. Luciferase reporter assay further demonstrates that EFNA3 is a target of miR-210. Then it is confirmed that miR-210 can regulate EFNA3 mRNA and protein expression in MPNST ST88-14 (NF1 wild-type) and sNF96.2 (NF1 mutant type) cell lines. The functions of miR-210 in MPNST cells were investigated, and the results showed that overexpression of miR-210 increased cellular viability, colony formation, S phase percentage, and invasiveness of MPNST cells. Inversely, inhibition of miR-210 expression induced suppression of proliferation and invasion of MPNST cells. These results suggest that miR-210-mediated EFNA3 promotion of proliferation and invasion of MPNST cells plays an important role in MPNST tumorigenesis and progression. miR-210 and EFNA3 may be candidate novel therapeutic targets for MPNST.
Insights
MicroRNA-210 (miR-210) is downregulated in malignant peripheral nerve sheath tumors (MPNSTs). Its regulation of ephrin-A3 (EFNA3) impacts MPNST cell proliferation and invasion, suggesting therapeutic potential.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- MicroRNAs (miRNAs) are crucial regulators in tumorigenesis.
- Downregulation of miR-210 is observed in various cancers.
- Malignant peripheral nerve sheath tumors (MPNSTs) are aggressive neurofibromatosis type 1-associated tumors.
Purpose of the Study:
- To investigate the role of miR-210 in MPNST.
- To identify and validate targets of miR-210 in MPNST.
- To elucidate the functional impact of the miR-210/EFNA3 axis on MPNST progression.
Main Methods:
- Quantitative real-time PCR (qRT-PCR) to assess miR-210 and EFNA3 expression.
- Luciferase reporter assay to confirm EFNA3 as a direct target of miR-210.
- Cell-based assays to evaluate the effects of miR-210 modulation on MPNST cell proliferation, viability, cell cycle, and invasion.
Main Results:
- miR-210 was significantly downregulated in MPNST cells compared to neurofibroma cells.
- Ephrin-A3 (EFNA3) was upregulated in MPNST cells and validated as a direct target of miR-210.
- Overexpression of miR-210 promoted MPNST cell viability, colony formation, S phase entry, and invasion.
- Inhibition of miR-210 suppressed MPNST cell proliferation and invasion.
Conclusions:
- The miR-210/EFNA3 pathway plays a critical role in MPNST tumorigenesis and progression.
- miR-210 promotes MPNST cell proliferation and invasion, potentially through EFNA3.
- miR-210 and EFNA3 represent potential therapeutic targets for MPNST treatment.
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