Abstract
Abdominal aortic aneurysm (AAA) has been associated with the dysfunction of vascular smooth muscle cells (VSMCs) and extracellular matrix (ECM) remodelling. Runt-related transcription factor 3 (RUNX3) has been reported to be up-regulated in aneurysmal aorta samples compared with normal aorta. However, its function in VSMCs and the mechanism of function remains unknown. Therefore, our study aimed to investigate the role of RUNX3 in ECM remodelling and VSMC function, and further explore the underlying mechanism. Our results verified that RUNX3 was increased in aortic samples of AAA compared with healthy controls. Overexpression vectors of RUNX3 (ov-RUNX3) and siRNA of RUNX3 (si-RUNX3) were transfected into Human aortic smooth muscle cells (HAoSMCs). The results indicated that ov-RUNX3 promoted cell proliferation, migration, and MMP-2/3/9 secretion, and suppressed TIMP-1, collagen I/III, SM22, MYH11 and CNN1 expression in HAoSMCs. The silencing of RUNX3 has the opposite effect. Furthermore, we found that RUNX3 targets TGF-β1 and suppressed its transcription. The silencing of TGF-β1 increased cell proliferation, migration and MMP-2/3/9 expression, and inhibited TIMP-1, Collagen I/III, SM22, MYH11 and CNN1 expression. In addition, TGF-β1 reversed the effect of RUNX3 overexpression on HAoSMCs. Hence, our study indicated that RUNX3 promotes cell proliferation, migration, and ECM remodelling through suppressing TGF-β1.
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Data availability
The analyzed data sets generated during the study are available from the corresponding author on reasonable request.
Abbreviations
- AAA:
-
Abdominal aortic aneurysm
- ECM:
-
Extracellular matrix
- VSMCs:
-
Vascular smooth muscle cells
- MMPs:
-
Matrix metalloproteinases
- TIMP-1:
-
Tissue inhibitor of metalloproteinases 1
- RUNX:
-
Runt related transcription factors
- HAoSMCs:
-
Human aortic smooth muscle cells
- OV-RUNX3:
-
Overexpression vectors of RUNX3
- si-RUNX3:
-
RUNX3 siRNA oligo duplex
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ZZ and HZ: conception, design and analysis of data, performed the data analyses, and wrote the manuscript. XZ: contributed to the conception of the study. XW: contributed significantly to analysis and manuscript preparation. All authors contributed to interpretation of date and review of the manuscript, and approved this manuscript for submission.
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Zhou, Z., Zhou, H., Zou, X. et al. RUNX3 is up-regulated in abdominal aortic aneurysm and regulates the function of vascular smooth muscle cells by regulating TGF-β1. J Mol Histol 53, 1–11 (2022). https://doi.org/10.1007/s10735-021-10035-9
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DOI: https://doi.org/10.1007/s10735-021-10035-9