Abstract
Hepatocyte nuclear factor-1β (Hnf1β) is associated with early embryogenesis failure, renal cysts, and/or diabetes. However, factors regulating Hnf1β expression in metanephric mesenchyme cells remain poorly understood. Here, we analyzed the modulation relationship of Hnf1β and miR-194 in mouse metanephric mesenchyme (MM) cells. Bioinformatics analysis, luciferase assay and semi-quantitative real-time (qPCR), western blotting, 5-ethynyl-2′-deoxyuridine cell proliferation assay, wound healing assay, and flow cytometry were employed to detect the function of miR-194 by targeting on Hnf1β in mouse MM cells. Bioinformatic prediction revealed one conserved binding site (CAGTATT) of miR-194 on Hnf1β 3’-UTR and luciferase reporter assay suggested that this is an effective target site of miR-194, and mutating CAGTATT with CGTACTT had no effects on luciferase activity compared with control. Overexpression of miR-194 decreased Hnf1β mRNA and protein level in mouse MM cells. In addition, miR-194-decreased cell proliferation and miR-194-promoted cell apoptosis and migration were reversed by overexpression of Hnf1β coding region. In addition, Hnf1β-upregulated genes were decreased in miR-194 overexpression cells and rescued in miR-194 and Hnf1β CDS region co-overexpression cells. Our findings explored one new regulator of Hnf1β and revealed the function of their regulation in cell proliferation, migration, and apoptosis in mouse metanephric mesenchyme cells. For strict regulation of Hnf1β in kidney development, these findings provide theoretical guidance for kidney development study and kidney disease therapy.
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Acknowledgements
Thanks to all the members in the M.O.E. Key Laboratory of Laboratory Medical Diagnostics, the College of Laboratory Medicine, and Chongqing Medical University.
Funding
This work is funded by the National Science Foundation for Young Scientists of China (Grant No. 31701218) and the Basic Science and Frontier Technology Research Program of Chongqing Science and Technology Commission (Grant No. cstc2017jcyjA0390) and by Yajun Xie Ph.D.
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Y.X. conceived and designed the study. Y.L. performed the experiments. Y.H., D.N., and J. L. contributed to materials and analysis tools. H. X. and L. X. provided reagents. Y. Liu and Y. X. wrote the manuscript with comments from all authors. Q. Z. provided conceptual advice.
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Editor: Tetsuji Okamoto
Highlights
• miR-194 is a negative regulator of Hnf1β in mouse MM cells
• miR-194 directly targets on the 3’-UTR of Hnf1β
• Hnf1β coding region rescues the phenotypes caused by miR-194-overexpression
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Supplementary Figure 1
miR-194 inhibited the NF-κB activity in mK3 cells. mK3 control cells and cells transfected with miR-194 or miR-194 combined with Hnf1β were detected with indicated antibodies by western blotting. (PDF 413 kb)
Supplementary Figure 2
miR-194-promoted cell apoptosis and delayed-cell cycle were partially rescued by Hnf1β coding region (A) Cell apoptosis of mK3 control cells and cells with expression of miR-194 or co-expression of miR-194 and Hnf1β were measured by flow cytometric analysis after FITC and PI staining. Q1, necrotic cells; Q2, late apoptotic cells; Q3, normal cells; Q4, early apoptotic cells. Q2 + Q4 cells were calculated as total apoptotic cells. (B) Quantitative analysis of flow cytometric analysis shown in (A). (C) Cell cycle distribution of mK3 control cells and cells with expression of miR-194 or co-expression of miR-194 and Hnf1β were measured by flow cytometric analysis. (D) Quantitative analysis of flow cytometric analysis shown in (C). Data were presented as mean ± SEM from three independent experiments. Statistical analysis was performed with Student’s t test. *p < 0.05. (PDF 549 kb)
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Liu, Y., Hu, Y., Ni, D. et al. miR-194 regulates the proliferation and migration via targeting Hnf1β in mouse metanephric mesenchyme cells. In Vitro Cell.Dev.Biol.-Animal 55, 512–521 (2019). https://doi.org/10.1007/s11626-019-00366-z
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DOI: https://doi.org/10.1007/s11626-019-00366-z