Atorvastatin downregulates HSP22 expression in an atherosclerotic model in vitro and in vivo

Chen,Qi; Xiang,Jian; Gong,Ren; Fang,Hai‑Yang; Xu,Cong‑Cong; Zhang,Hong‑Zhou; Wu,Yan‑Qing

doi:10.3892/ijmm.2018.4015

Atorvastatin downregulates HSP22 expression in an atherosclerotic model in vitro and in vivo

Authors:
- Qi Chen
- Jian Xiang
- Ren Gong
- Hai‑Yang Fang
- Cong‑Cong Xu
- Hong‑Zhou Zhang
- Yan‑Qing Wu
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Affiliations: Department of Cardiology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
Published online on: December 3, 2018 https://doi.org/10.3892/ijmm.2018.4015
Pages: 821-829
Copyright: © Chen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

One of the pathological functions of heat shock protein 22 (HSP22) is the association with inflammatory diseases and atherosclerosis. However, the effects of a high‑fat diet (HFD) or oxidized low‑density lipoprotein (ox‑LDL) combined with atorvastatin (ATV) on HSP22 expression are entirely unknown. The present study investigated the effects of ATV on HSP22 expression in HFD‑induced atherosclerotic apolipoprotein E‑deficient (ApoE‑/‑) mice and in ox‑LDL‑induced human umbilical vein endothelial cells (HUVECs). Furthermore, the influence of HSP22‑knockdown on the HFD- or ox‑LDL‑induced atherosclerotic model was also examined. It was found that HFD or ox‑LDL treatment significantly increased HSP22 expression in the serum and aorta, accompanied by decreased phosphorylated (p)‑endothelial nitric oxide synthase (p-eNOS) activity and activated p38 mitogen‑activated protein kinase (MAPK). However, these effects were suppressed by treatment with ATV. Furthermore, HSP22-knockdown showed reduced ox‑LDL‑induced lesions, evidenced by increased p‑eNOS activity and inactivated p38 MAPK, while suppression of cell proliferation inhibition and cell cycle arrest were also observed. Taken together, the results of this study suggest that HFD or ox‑LDL increased the expression of HSP22 and p‑p38 MAPK, and decreased the p‑eNOS activity in vitro and in vivo, and ATV could reduce the effects by downregulating HSP22 expression.

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