Exosome-derived miR-127-5p promotes embryonic-like stem cells differentiation into pacemaker cell through NKx2.5
1Clinical Medical College of Yangzhou University, Yangzhou, China; Department of Cardiology, Northern Jiangsu People's Hospital, Yangzhou, China.
Abstract:
Available evidence suggests the involvement of microRNAs (miRNAs) in the pathological process of several diseases. Nonetheless, molecular mechanism underlying biological effects of miRNAs such as pacemaker exosome-derived miR-127-5p in embryonic-like stem cells (ESCs) differentiation into pacemaker cell is yet to be clarified. Through real time quantitative polymerase chain reaction (qPCR) or western blotting (WB) techniques, levels of miRNAs, miR-127-5p, and NKx2.5 expressions were quantitatively measured. Cellular differentiation (CD) was probed with flow cytometric (FC) and WB techniques. Prediction of miR-127-5p association with NKx2.5 was studied through bioinformatics tools before verification with luciferase assays. Promotion of ESCs differentiation to pacemaker through miR-127-5p was measured with qPCR and WB techniques. Through the same assaying methods, up-regulation of pace-making genes (Shox2, HCN4, Cx45, Tbx3 and Tbx18) expression was observed in Nkx2.5 knockdown group. However, Nkx2.5 expression was down-regulated during differentiation of pacemaker-like cells into ESCs. Furthermore, techniques (such as qPCR, WB, immunofluorescent staining and FC) were employed to demonstrate that overexpressed miR-127-5p could suppress NKx2.5 expression. Through NKx2.5 targeting, ESCs could be differentiated into pacemaker-like cells with miR-127-5p possibly serving as a crucial positive regulator. On the account of our findings, further researches are needed to unearth the possible underlying mechanism and role of exosome-derived miRNAs in cell signaling.
Insights
Exosome-derived miR-127-5p promotes embryonic-like stem cell differentiation into pacemaker cells by suppressing NKx2.5. This finding highlights miR-127-5p as a potential regulator in cardiac cell development.
Area of Science:
- Cardiovascular Biology
- Stem Cell Biology
- Molecular Genetics
Background:
- MicroRNAs (miRNAs) are implicated in disease pathogenesis.
- The specific role of exosome-derived miR-127-5p in embryonic-like stem cell (ESC) differentiation into pacemaker cells requires elucidation.
Purpose of the Study:
- To investigate the molecular mechanism of miR-127-5p in ESC differentiation into pacemaker cells.
- To determine the regulatory relationship between miR-127-5p and NKx2.5 during this differentiation process.
Main Methods:
- Real-time quantitative polymerase chain reaction (qPCR) and Western blotting (WB) for gene and protein expression analysis.
- Flow cytometry (FC) and immunofluorescent staining for cellular differentiation assessment.
- Bioinformatics and luciferase assays to predict and verify miR-127-5p and NKx2.5 interaction.
Main Results:
- miR-127-5p overexpression suppressed NKx2.5 expression.
- miR-127-5p promoted ESC differentiation into pacemaker-like cells by targeting NKx2.5.
- NKx2.5 knockdown led to up-regulation of key pacemaker genes (Shox2, HCN4, Cx45, Tbx3, Tbx18).
- NKx2.5 expression decreased during pacemaker-like cell differentiation into ESCs.
Conclusions:
- Exosome-derived miR-127-5p acts as a positive regulator in ESC differentiation into pacemaker cells.
- Targeting NKx2.5 by miR-127-5p is a key mechanism in this process.
- Further research is needed to explore exosome-derived miRNAs in cell signaling and cardiac development.
