Abstract
Background
The combined restoration of tumor-suppressive microRNAs (miRs) has been identified as a promising approach for inhibiting breast cancer development. This study investigated the effect of the combined restoration of miR-424-5p and miR-142-3p on MCF-7 cells and compared the efficacy of the combined therapy with the monotherapies with miR-424-5p and miR-142-3p.
Methods
After transfection of miR-424-5p and miR-142-3p mimics into MCF-7 cells in the combined and separated manner, the proliferation of tumoral cells was assessed by the MTT assay. Also, the apoptosis, autophagy, and cell cycle of the cells were analyzed by flow cytometry. Western blot and qRT-PCR were used to study the expression levels of c-Myc, Bcl-2, Bax, STAT-3, Oct-3, and Beclin-1.
Results
Our results have demonstrated that the combined restoration of miR-424-5p and miR-142-3p is more effective in inhibiting tumor proliferation via upregulating Bax and Beclin-1 and downregulating Bcl-2 and c-Myc. Besides, the combined therapy has arrested the cell cycle in the sub-G1 and G2 phases and has suppressed the clonogenicity via downregulating STAT-3 and Oct-3, respectively.
Conclusion
The combined restoration of miR-424-5p and miR-142-3p is more effective in inhibiting MCF-7 breast cancer development than monotherapies with miR-424-5p and miR-142-3p.
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Data availability
The data would be available if requested by Editor or reviewers. They would be provided by Dr. Safaralizadeh (corresponding author).
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We appreciated Immunology research center of Tabriz (IRC) for providing facilities.
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ND acquired and analyzed the data and wrote the manuscript, RS designed the work, SMB and MH wrote and revised the manuscript, MA substantially revised the manuscript, BB, ShA, and AR drafted the work and revised the manuscript.
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Dastmalchi, N., Safaralizadeh, R., Khojasteh, S.M.B. et al. The combined restoration of miR-424-5p and miR-142-3p effectively inhibits MCF-7 breast cancer cell line via modulating apoptosis, proliferation, colony formation, cell cycle and autophagy. Mol Biol Rep 49, 8325–8335 (2022). https://doi.org/10.1007/s11033-022-07646-0
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DOI: https://doi.org/10.1007/s11033-022-07646-0