Open Access

miRNA‑504 inhibits p53‑dependent vascular smooth muscle cell apoptosis and may prevent aneurysm formation

  • Authors:
    • Xue Cao
    • Zhenguo Cai
    • Junyan Liu
    • Yanru Zhao
    • Xin Wang
    • Xueqi Li
    • Hongyuan Xia
  • View Affiliations

  • Published online on: June 28, 2017     https://doi.org/10.3892/mmr.2017.6873
  • Pages: 2570-2578
  • Copyright: © Cao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Abdominal aortic aneurysm (AAA) is a common disease that is associated with the proliferation and apoptosis of vascular smooth muscle cells (VSMCs). VSMCs are regulated by microRNAs (miRNA). The aim of the present study was to identify miRNA sequences that regulate aortic SMCs during AAA. miRNA‑504 was identified using a miRNA PCR array and by reverse transcription‑quantitative polymerase chain reaction analysis, and its expression levels were observed to be downregulated in the aortic cells derived from patients with AAA when compared with controls. Transfection of SMCs with pMSCV‑miRNA‑504 vector was performed, and cell proliferation and the expression levels of proliferating cell nuclear antigen (PCNA), replication factor C subunit 4 (RFC4), B‑cell lymphoma‑2 (Bcl‑2) and caspase‑3/9 were measured by western blotting. The mechanisms underlying the effects of miRNA‑504 was then analyzed. The results demonstrated that overexpression of miRNA‑504 significantly upregulated the expression levels of PCNA, RFC4 and Bcl‑2, while caspase‑3/9 expression was significantly inhibited when compared with non‑targeting controls. In addition, miRNA‑504 overexpression was observed to promote the proliferation of SMCs. The expression level of the tumor suppressor, p53, which is known to be a direct target of miRNA‑504, was inhibited following transfection of SMCs with pMSCV‑miRNA‑504. In addition, the expression of the downstream targets of p53, p21 and Bcl‑like protein‑4, were significantly reduced following overexpression of miRNA‑504. These results revealed the anti‑apoptotic role of miRNA‑504 in SMCs derived from patients with AAA via direct targeting of p53.
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September-2017
Volume 16 Issue 3

Print ISSN: 1791-2997
Online ISSN:1791-3004

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Spandidos Publications style
Cao X, Cai Z, Liu J, Zhao Y, Wang X, Li X and Xia H: miRNA‑504 inhibits p53‑dependent vascular smooth muscle cell apoptosis and may prevent aneurysm formation. Mol Med Rep 16: 2570-2578, 2017
APA
Cao, X., Cai, Z., Liu, J., Zhao, Y., Wang, X., Li, X., & Xia, H. (2017). miRNA‑504 inhibits p53‑dependent vascular smooth muscle cell apoptosis and may prevent aneurysm formation. Molecular Medicine Reports, 16, 2570-2578. https://doi.org/10.3892/mmr.2017.6873
MLA
Cao, X., Cai, Z., Liu, J., Zhao, Y., Wang, X., Li, X., Xia, H."miRNA‑504 inhibits p53‑dependent vascular smooth muscle cell apoptosis and may prevent aneurysm formation". Molecular Medicine Reports 16.3 (2017): 2570-2578.
Chicago
Cao, X., Cai, Z., Liu, J., Zhao, Y., Wang, X., Li, X., Xia, H."miRNA‑504 inhibits p53‑dependent vascular smooth muscle cell apoptosis and may prevent aneurysm formation". Molecular Medicine Reports 16, no. 3 (2017): 2570-2578. https://doi.org/10.3892/mmr.2017.6873