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Aspirin Inhibits LPS-Induced Expression of PI3K/Akt, ERK, NF-κB, CX3CL1, and MMPs in Human Bronchial Epithelial Cells

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Abstract

This study focused on the effects of aspirin on lipopolysaccharide (LPS)-induced expression of phosphoinositide 3 kinase (PI3K)/protein kinase B (Akt), extracellular signal-regulated protein kinase (ERK), nuclear factor-κB (NF-κB), CX3CL1, and MMPs in human bronchial epithelial cells. Human bronchial epithelial cells were seeded in six-well plates. After 24 h, the cells were classified into six groups: control blank (CK) group; LPS group; PD98059 (ERK inhibitor) (PD) group, treated with LPS + ERK inhibitor; LY294002(PI3K/Akt inhibitor) (LY) group, treated with LPS + PI3K/Akt inhibitor; Aspirin (Asp) group, treated with LPS + aspirin; and Pyrrolidinedithiocarbamic acid (PDTC) group, treated with LPS + NF-κB inhibitor. After 4-h treatment, the cells were harvested. Western blot analysis was performed to detect the expression of PI3K/Akt, ERK, NF-κB, and CX3CL1. Real-time quantitative PCR (RT-qPCR) was used to determine the gene expression of MMP-7, MMP-9, and MMP-12. Compared to the CK group, expression of PI3K/Akt, ERK, NF-κB, and CX3CL1 was significantly increased in the LPS group (P < 0.05). When compared to the LPS group, expression of PI3K/Akt, ERK, NF-κB, and CX3CL1 was significantly decreased in the PD group, PDTC group, and Asp group (P < 0.05). In addition, expression of NF-κB in the LY group was significantly reduced by comparison with the LPS group (P < 0.05). RT-qPCR: When compared to the LPS group, expression of MMP-7 and MMP-12 was significantly decreased in Asp group (P < 0.05). Expression of MMP-12 was significantly reduced in LY group (P < 0.05). LPS-ERK, NF-κB-PI3K/Akt, and CX3CL1 signal pathways exist in human bronchial epithelial cells. The PI3K/Akt inhibitor repressed expression of MMP-12. Aspirin inhibited LPS-induced expression of PI3K, Akt, ERK, NF-κB, CX3CL1, MMP-7, and MMP-12 in human bronchial epithelial cells.

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Authors and Affiliations

  1. ICU Department, First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, 310006, China

    Ronglin Jiang, Meifei Zhu, Jiannong Wu & Lingcong Wang

  2. Zhejiang Chinese Medical University, Hangzhou, China

    Liling Wei

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Correspondence to Lingcong Wang.

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Funding

Funded by Zhejiang Provincial Program for the Cultivation of High-Level Innovative Health Talents (2014-18), the medical and health platform program (key support) of Zhejiang province (Grant No. 2015ZDA022), the Natural Sciences Fund of Zhejiang Province (Grant No. LY12H29005), and Key Disciplines of Integrative Traditional Chinese Medicine and Western Medicine of Zhejiang Province (Grant No. 2012-XK-A12).

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Jiang, R., Wei, L., Zhu, M. et al. Aspirin Inhibits LPS-Induced Expression of PI3K/Akt, ERK, NF-κB, CX3CL1, and MMPs in Human Bronchial Epithelial Cells. Inflammation 39, 643–650 (2016). https://doi.org/10.1007/s10753-015-0289-8

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