Abstract
Introduction
Mesenchymal stem cells (MSCs) are drawing considerable attention in the field of regenerative medicine due to their differentiation capabilities. The miRNAs are among the most important epigenetic regulators of MSC differentiation. Our previous study identified miR-4699 as a direct suppressor of the DKK1 and TNSF11 gene expression. However, the precise osteogenic-related phenotype or mechanism caused by miR-4699 change has yet to be dealt with in depth.
Material and Methods
In the present study, miR-4699 mimics were transfected into human Adipose tissue-derived mesenchymal stem cells (hAd-MSCs) and osteoblast marker gene expression (RUNX2, ALP, and OCN), was analyzed to investigate whether miR-4699 promotes osteoblast differentiation of hAd-MSCs through targeting the DKK-1 and TNFSF11. We further examined and compared the effects of recombinant human BMP2 with miR-4699 on cell differentiation. In addition to quantitative PCR, analysis of alkaline phosphatase activity, calcium content assay, and Alizarin red staining were used to explore osteogenic differentiation. To evaluate the effect of miR-4699 on its target gene (on protein level) we utilized the western blotting technique.
Results
The overexpression of miR-4699 in hAd-MSCs resulted in the stimulation of alkaline phosphatase activity, osteoblast mineralization, and the expression of RUNX2, ALP, and OCN osteoblast marker genes.
Conclusion
Our findings indicated that miR-4699 supported and synergized the BMP2-induced osteoblast differentiation of mesenchymal stem cells. We suggest, thereof, the utilization of hsa-miR-4699 for further in vivo experimental investigation to reveal the potential therapeutic impact of regenerative medicine for different types of bone defects.
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Availability of data and materials
The datasets used and/or analyzed during the current study are available from the corresponding author upon reasonable request.
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Acknowledgements
The author thanks the Cellular and Molecular Biology Research Center and Medical Nanotechnology and Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran, for providing technical support.
Funding
This project was funded by Shahid Beheshti University of Medical Sciences, Tehran, Iran (Contact grant No: 32003). The funders had no role in the study design, data collection, analysis, decision to publish, or preparation of the manuscript.
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VH: conceptualization, investigation, formal analysis, methodology, resources, writing—original draft, writing—review, and editing. Ak: data curation, investigation, formal analysis, resources, writing—original draft, writing—review, and editing. HMC: methodology and writing—review and editing. SM-Y and MP: conceptualization, formal analysis, funding acquisition, methodology, writing—original draft and writing—review and editing.
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This project was approved and supervised by the ethical committee of Shahid Beheshti University of Medical Sciences, (ethics number Iran (IR.SBMU.REC.1401.002)).
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Hosseini, V., Paryan, M., Koochaki, A. et al. Mir-4699 promotes the osteogenic differentiation of mesenchymal stem cells. J Bone Miner Metab 41, 481–491 (2023). https://doi.org/10.1007/s00774-023-01433-y
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DOI: https://doi.org/10.1007/s00774-023-01433-y