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Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs

  • Authors:
    • Guo Dong
    • Shusen Yang
    • Xuefei Cao
    • Nannan Yu
    • Jiangbo Yu
    • Xiufen Qu
  • View Affiliations / Copyright

    Affiliations: Cardiovascular Department, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China, Department of Ophthalmology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
    Copyright: © Dong et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 3076-3082
    |
    Published online on: March 28, 2017
       https://doi.org/10.3892/mmr.2017.6401
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Abstract

Low shear stress (LSS) is a well‑established risk factor resulting in endothelial apoptosis and atherosclerosis. Autophagy has been reported to be involved in the development of atherosclerosis. However, whether autophagy participates in LSS‑induced atherosclerosis remains unclear. The effect of autophagy and its association with apoptosis, in the development of atherosclerosis, remains controversial. Therefore, in the present study, the level and role of autophagy in human umbilical vein endothelial cells (HUVECs) exposed to LSS was examined. The results revealed that LSS increased the formation of autophagosomes and MAP1 light chain 3‑like protein (LC3) puncta (as demonstrated by transmission electron microscopy and immunofluorescence), and the protein levels of Beclin‑1 and LC3II decreased the expression of p62 [as revealed by western blot analysis (WB)]. Furthermore, the level of p62 decreased when autophagy was induced by rapamycin, and increased when autophagy was inhibited by chloroquine (CQ), which indicated that LSS may serve an important role in inducing autophagy flux. In addition, it was observed that HUVECs treated with LSS underwent apoptotic death, by monitoring the rate of apoptosis and the expression of apoptosis regulator BAX (Bax) and apoptosis regulator Bcl‑2 (Bcl‑2) (by flow cytometry and WB) and the LSS‑induced apoptosis in HUVECs, that was significantly alleviated by pretreatment with rapamycin, partially via a decrease in the level of Bax and an increase in the level of Bcl‑2. Pretreatment of HUVECs with CQ markedly increased LSS‑induced apoptosis, which was associated with an increased expression of Bax and a decreased expression of Bcl‑2. In conclusion, the results of the present study indicate that LSS increases the level of autophagy, which may be through a Bcl‑2/Beclin‑1‑dependent mechanism, which serves a protective role against LSS‑induced apoptosis.
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Copy and paste a formatted citation
Spandidos Publications style
Dong G, Yang S, Cao X, Yu N, Yu J and Qu X: Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs. Mol Med Rep 15: 3076-3082, 2017.
APA
Dong, G., Yang, S., Cao, X., Yu, N., Yu, J., & Qu, X. (2017). Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs. Molecular Medicine Reports, 15, 3076-3082. https://doi.org/10.3892/mmr.2017.6401
MLA
Dong, G., Yang, S., Cao, X., Yu, N., Yu, J., Qu, X."Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs". Molecular Medicine Reports 15.5 (2017): 3076-3082.
Chicago
Dong, G., Yang, S., Cao, X., Yu, N., Yu, J., Qu, X."Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs". Molecular Medicine Reports 15, no. 5 (2017): 3076-3082. https://doi.org/10.3892/mmr.2017.6401
Copy and paste a formatted citation
x
Spandidos Publications style
Dong G, Yang S, Cao X, Yu N, Yu J and Qu X: Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs. Mol Med Rep 15: 3076-3082, 2017.
APA
Dong, G., Yang, S., Cao, X., Yu, N., Yu, J., & Qu, X. (2017). Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs. Molecular Medicine Reports, 15, 3076-3082. https://doi.org/10.3892/mmr.2017.6401
MLA
Dong, G., Yang, S., Cao, X., Yu, N., Yu, J., Qu, X."Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs". Molecular Medicine Reports 15.5 (2017): 3076-3082.
Chicago
Dong, G., Yang, S., Cao, X., Yu, N., Yu, J., Qu, X."Low shear stress‑induced autophagy alleviates cell apoptosis in HUVECs". Molecular Medicine Reports 15, no. 5 (2017): 3076-3082. https://doi.org/10.3892/mmr.2017.6401
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