MiRNA expression profile and miRNA-mRNA integrated analysis (MMIA) during podocyte differentiation
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Updated: Apr 20, 2026
Guided Differentiation of Mature Kidney Podocytes from Human Induced Pluripotent Stem Cells Under Chemically Defined Conditions
Published on: July 2, 2020
Zhigui Li1, Lifeng Wang, Jing Xu
1College of Medicine, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Tumor Microenvironment and Neurovascular Regulation, Nankai University, Tianjin, 300071, China.
Abstract:
The podocyte is a prominent cell type, which encases the capillaries of glomerulus. Podocyte-selective deletion of Dicer or Drosha was reported to induce proteinuria and glomerulosclerosis, suggesting the essential role of microRNA (miRNA) in podocytes for renal function. However, no comprehensive miRNA expression or miRNA-mRNA integrated analysis (MMIA) can be found during podocyte differentiation. Herein, miRNA and mRNA microarrays are presented, which were carried out in differentiated and undifferentiated mouse podocyte cell lines (MPC5). A total of 50 abnormal miRNAs (26 down-regulated and 24 up-regulated) were identified in differentiated and undifferentiated podocytes. Using MMIA, 80 of the 743 mRNAs (>twofold change) were predicted for potential crosstalk with 30 miRNAs of the 50 abnormal miRNAs. In addition, the gene ontology of mRNAs and the pathway analysis of miRNAs revealed a new potential-regulated network during podocyte differentiation. The expressions of three remarkably changed miRNAs (miR-34c, miR-200a and miR-467e) and four mRNAs (Runx1t1, Atp2a2, Glrp1, and Mmp15), were randomly chosen for further validation by the quantitative real-time polymerase chain reaction, and their expression trends were consistent with the microarray data. Reference searching was also conducted to confirm our data and to find potential new molecules and miRNA-target pairs involved in the podocyte differentiation. The dual luciferase reporter assay for miR-200a/GLRX and let-7b/ARL4D confirmed the prediction of MMIA. The results of this study provide a detailed integration of mRNA and miRNA during podocyte differentiation. The molecular integration mode will open up new perspectives for a better understanding of the mechanism during podocyte differentiation.
Insights
This study reveals key microRNAs (miRNAs) and messenger RNAs (mRNAs) involved in mouse podocyte differentiation. The findings provide a detailed molecular map, enhancing understanding of kidney function and differentiation mechanisms.
Area of Science:
- Nephrology
- Molecular Biology
- Genetics
Background:
- Podocytes are crucial for kidney filtration and function.
- MicroRNAs (miRNAs) play a vital role in podocyte biology, but their specific roles in differentiation are not fully understood.
- Previous studies suggest miRNA dysregulation contributes to kidney disease.
Purpose of the Study:
- To comprehensively analyze miRNA and mRNA expression during mouse podocyte differentiation.
- To perform an integrated miRNA-mRNA analysis (MMIA) to identify regulatory networks.
- To validate key miRNA-mRNA interactions involved in podocyte differentiation.
Main Methods:
- Microarray analysis of miRNA and mRNA in differentiated and undifferentiated mouse podocyte cell lines (MPC5).
- MiRNA-mRNA integrated analysis (MMIA) to predict crosstalk between miRNAs and mRNAs.
- Quantitative real-time PCR and dual luciferase reporter assays for validation.
Main Results:
- Identified 50 differentially expressed miRNAs (26 down-regulated, 24 up-regulated) during podocyte differentiation.
- MMIA predicted crosstalk between 30 miRNAs and 80 mRNAs.
- Validated expression trends of key miRNAs (miR-34c, miR-200a, miR-467e) and mRNAs (Runx1t1, Atp2a2, Glrp1, Mmp15).
- Confirmed specific miRNA-mRNA interactions (miR-200a/GLRX, let-7b/ARL4D) using dual luciferase reporter assays.
Conclusions:
- This study provides a detailed integration of mRNA and miRNA expression profiles during podocyte differentiation.
- The identified molecular network offers new insights into the mechanisms regulating podocyte differentiation.
- These findings can advance the understanding of kidney development and disease.
