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Nkx2-5 Regulates the Proliferation and Migration of H9c2 Cells
Hongshu Wang1, Yong Liu2, Shen Han1
1Yan'an Hospital Affiliated to Kunming Medical University, Kunming, Yunnan, China (mainland).
Abstract:
BACKGROUND The protein NKX2-5 affects mammalian heart development. In mice, the disruption of Nkx2-5 has been associated with arrhythmias, abnormal myocardial contraction, abnormal cardiac morphogenesis, and death. However, the details of the mechanisms are unclear. This study was designed to investigate them. MATERIAL AND METHODS Rat cardiomyocytes from the H9c2 cell line were used in our study. First, we knocked down Nkx2-5 in the H9c2 cells and then validated consequent changes in cell proliferation and migration. We then used RNA sequencing to determine the changes in transcripts. Finally, we validated these results by quantitative reverse transcription-polymerase chain reaction. RESULTS We confirmed that Nkx2-5 regulates the proliferation and migration of H9c2 cells. In our experiments, Nkx2-5 regulated the expression of genes related to proliferation, migration, heart development, and disease. Based on bioinformatics analysis, knockdown of Nkx2-5 caused differential expression of genes involved in cardiac development, calcium ion-related biological activity, the transforming growth factor (TGF)-ß signaling pathway, pathways related to heart diseases, the MAPK signaling pathway, and other biological processes and signaling pathways. CONCLUSIONS Nkx2-5 may regulate proliferation and migration of the H9c2 cells through the genes Tgfb-2, Bmp10, Id2, Wt1, Hey1, and Cacna1g; rno-miR-1-3p; the TGF‑ß signaling pathway; the MAPK signaling pathway; as well as other genes and pathways.
Insights
The protein NKX2-5 is crucial for heart development. This study shows NKX2-5 regulates cardiomyocyte proliferation and migration, impacting cardiac development and disease pathways.
Area of Science:
- Cardiovascular Biology
- Developmental Biology
- Molecular Genetics
Background:
- The transcription factor NKX2-5 is essential for mammalian heart development.
- NKX2-5 disruption in mice leads to cardiac defects, including arrhythmias and abnormal morphogenesis.
- The precise molecular mechanisms underlying NKX2-5's role remain incompletely understood.
Purpose of the Study:
- To investigate the role of NKX2-5 in regulating cardiomyocyte proliferation and migration.
- To identify genes and signaling pathways affected by NKX2-5 knockdown.
- To elucidate the molecular mechanisms of NKX2-5 in cardiac development.
Main Methods:
- Utilized the H9c2 rat cardiomyocyte cell line.
- Performed NKX2-5 knockdown and assessed effects on cell proliferation and migration.
- Employed RNA sequencing for transcriptomic analysis.
- Validated gene expression changes using quantitative reverse transcription-polymerase chain reaction (qRT-PCR).
Main Results:
- Confirmed NKX2-5's regulatory role in H9c2 cell proliferation and migration.
- Identified differential gene expression related to proliferation, migration, heart development, and disease.
- Bioinformatics analysis revealed NKX2-5 affects genes in cardiac development, calcium signaling, TGF-ß, MAPK pathways, and heart disease-related pathways.
Conclusions:
- NKX2-5 regulates H9c2 cell proliferation and migration.
- Potential downstream targets include genes such as Tgfb-2, Bmp10, Id2, Wt1, Hey1, and Cacna1g, as well as rno-miR-1-3p.
- NKX2-5 exerts its effects possibly via the TGF-ß and MAPK signaling pathways, among others.
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