LPS‑induced proinflammatory cytokine expression in human airway epithelial cells and macrophages via NF‑κB, STAT3 or AP‑1 activation

Liu,Xuefang; Yin,Sugai; Chen,Yulong; Wu,Yaosong; Zheng,Wanchun; Dong,Haoran; Bai,Yan; Qin,Yanqin; Li,Jiansheng; Feng,Suxiang; Zhao,Peng

doi:10.3892/mmr.2018.8542

April-2018 Volume 17 Issue 4

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April-2018 Volume 17 Issue 4

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Article

LPS‑induced proinflammatory cytokine expression in human airway epithelial cells and macrophages via NF‑κB, STAT3 or AP‑1 activation

Authors:
- Xuefang Liu
- Sugai Yin
- Yulong Chen
- Yaosong Wu
- Wanchun Zheng
- Haoran Dong
- Yan Bai
- Yanqin Qin
- Jiansheng Li
- Suxiang Feng
- Peng Zhao
View Affiliations / Copyright

Affiliations: Henan Key Laboratory of Chinese Medicine for Respiratory Disease, Henan University of Chinese Medicine, Zhengzhou, Henan 450046, P.R. China
Pages: 5484-5491
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Published online on: February 2, 2018

https://doi.org/10.3892/mmr.2018.8542
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Abstract

Lipopolysaccharide (LPS), the major outer surface membrane component of Gram-negative bacteria, is one of the main etiological factors in the pathogenesis of several lung diseases, such as chronic obstructive pulmonary disease. The respiratory epithelium and the macrophages comprise the dynamic interface between the outside environment and the host response to bacterial infection via cytokine secretion. In the present study, the mechanisms of LPS induced‑inflammatory response in human lung cells and macrophages were investigated. The effects of LPS exposure on cytokine production, inflammation‑related transcription factors and intracellular signaling pathway activation were assessed in human lung mucoepidermoid carcinoma H292 cells and human macrophage THP‑1 cells. The results demonstrated that LPS markedly increased the expression of interleukin (IL)‑6, IL‑8, tumor necrosis factor (TNF)‑α, matrix metallopeptidase (MMP)‑9 and tissue inhibitor of metalloproteinases‑1 in H292 cells, while it increased the production of IL‑6, IL‑8 and TNF‑α in differentiated THP‑1 cells. In addition, LPS exposure activated nuclear factor (NF)‑κB and activator protein (AP)‑1 signaling in H292 cells, while it activated NF‑κB and signal transducer and activator of transcription (STAT) 3 signaling in THP‑1 cells. Furthermore, treatment with NF‑κB, AP‑1 or STAT3 inhibitors significantly decreased the LPS‑mediated expression of IL‑8 and TNF‑α in these cells, suggesting that these pathways might serve crucial roles in LPS‑induced cytokine expression. In conclusion, LPS stimulation of H292 and THP‑1 cells induced cytokine expression and NF‑κB, mitogen‑activated protein kinase and Janus kinase/STAT3 pathway activation with subsequent nuclear translocation of NF‑κB, AP‑1 and STAT3, which demonstrated potential of the use of NF‑κB, AP‑1 and STAT3 in therapies for conditions and diseases associated with chronic inflammation.

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Journals

International Journal of Molecular Medicine

International Journal of Oncology

Molecular Medicine Reports

Oncology Reports

Experimental and Therapeutic Medicine

Oncology Letters

Biomedical Reports

Molecular and Clinical Oncology

World Academy of Sciences Journal

International Journal of Functional Nutrition

International Journal of Epigenetics

Medicine International

LPS‑induced proinflammatory cytokine expression in human airway epithelial cells and macrophages via NF‑κB, STAT3 or AP‑1 activation

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