Abstract
MicroRNAs control the genes involved in hematopoietic stem cell (HSCs) survival, proliferation and differentiation. The over-expression of miR-146 and miR-150 has been reported during differentiation of HSCs into T-lymphoid lineage. Therefore, in this study we evaluated the effect of their over-expression on CD133+ cells differentiation to T cells. miR-146a and miR-150 were separately and jointly transduced to human cord blood derived CD133+ cells (>97 % purity). We used qRT-PCR to assess the expression of CD2, CD3ε, CD4, CD8, CD25, T cell receptor alpha (TCR-α) and Ikaros genes in differentiated cells 4 and 8 days after transduction of the miRNAs. Following the over-expression of miR-146a, significant up-regulation of CD2, CD4, CD25 and Ikaros genes were observed (P < 0.01). On the other hand, over-expression of miR-150 caused an increase in the expression of Ikaros, CD4, CD25 and TCR-α. To evaluate the combinatorial effect of miR-146a and miR-150, transduction of both miRNAs was concurrently performed which led to increase in the expression of Ikaros, CD4 and CD3 genes. In conclusion, it seems that the effect of miR-150 and miR-146a on the promotion of T cell differentiation is time-dependant. Moreover, miRNAs could be used either as substitutes or complements of the conventional differentiation protocols for higher efficiency.
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Abbreviations
- HSC:
-
Hematopoietic stem cell
- qRT-PCR:
-
Quantitative reverse transcriptase polymerase chain reaction
- TCR:
-
T cell receptor
- CD:
-
Cluster differentiation
- UTR:
-
Untranslated region
- miR:
-
MicroRNA
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Acknowledgments
This study was supported by a Grant from Stem Cell Technology Research Center, Tehran, Iran. Also, we particularly thank Dr. Yousof Gheisari for his scientific assistance in manuscript writing and Fatemeh Kohram for language editing.
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11033_2013_2567_MOESM2_ESM.tif
Supplementary figure 2: Fluorescent microscopic picture of HEK cells 48 h after transfection (×100). A: Light microscopic picture of the HEK cells. B: The HEK cells transfected with pLEX-jRED + miR-146a. Scale bar=100µm (TIFF 2506 kb)
11033_2013_2567_MOESM4_ESM.tif
Supplementary figure 3: Verification of CD133+ cells separated by flow cytometry. Anti-CD133 and anti-CD34 positive cells percent in R1= 97.4% of total cells. RN1= Q2+Q4 = CD34+ cells, RN2 = Q1+Q2 = CD133+ cells (TIFF 243 kb)
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Fallah, P., Arefian, E., Naderi, M. et al. miR-146a and miR-150 promote the differentiation of CD133+ cells into T-lymphoid lineage. Mol Biol Rep 40, 4713–4719 (2013). https://doi.org/10.1007/s11033-013-2567-6
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DOI: https://doi.org/10.1007/s11033-013-2567-6