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Inflammation

pp 1–11 | Cite as

Damage and Phenotype Change in PC12 Cells Induced by Lipopolysaccharide Can Be Inhibited by Antioxidants Through Reduced Cytoskeleton Protein Synthesis

  • Chun ZhangEmail author
  • Ping Yu
  • Jing Ma
  • Liang Zhu
  • Ajing Xu
  • Jian ZhangEmail author
Original Article
  • 51 Downloads

Abstract

The present study investigated changes in cellular phenotype and oxidative stress during the inflammatory response in PC12 cells stimulated by lipopolysaccharide (LPS) and assessed the effects of minocycline, astragalus (AST), and baicalin on inflammation. PC12 cells were exposed to LPS with or without minocycline, AST, or baicalin. Cell viability was measured by a thiazolyl blue tetrazolium bromide (MTT) assay. Contrast and laser confocal microscopy were used to analyze changes in cellular phenotype and cytoskeleton synthesis. Western blotting tested the expression of α7nAChR and vimentin. Inhibitory ratio of superoxide dismutase (SOD) activity and leakage of lactate dehydrogenase (LDH) were detected to evaluate cellular oxidative stress. Results showed that LPS could attenuate PC12 cell viability in a time- and dose-dependent manner, which could be rescued by minocycline. In addition, minocycline could reverse PC12 cell phenotypic change and the synthesis of the mesenchymal cytoskeleton protein vimentin, both induced by LPS. During LPS-initiated inflammation, α7nAChR and vimentin expression were obviously inhibited by minocycline, AST, or baicalin. The inhibitory rate of SOD activity and LDH leakage in PC12 cells were increased by LPS and attenuated significantly when exposed to minocycline, AST, or baicalin. These findings suggest phenotype change, altered cytoskeleton protein synthesis, and oxidative stress are all involved in the inflammatory response in PC12 cells during which α7 nicotinic acetylcholine receptor (α7nAChR) is induced by LPS stimulation. Minocycline, AST, and baicalin have a protective effect against PC12 cell injury, acting as antioxidants and inhibitors of mesenchymal proteins.

Key Words

lipopolysaccharide (LPS) inflammation phenotype change vimentin superoxide dismutase (SOD) 

Abbreviations

LPS

Lipopolysaccharide

AST

Astragalus

EMT

Epithelial-to-mesenchymal transition

SOD

Superoxide dismutase

LDH

Lactate dehydrogenase

ROS

Reactive oxygen species

MTT

Thiazolyl blue tetrazolium bromide

Mino

Minocycline

α7nAChR

α7 nicotinic acetylcholine receptor.

Notes

Funding Information

This work was supported by the Science Innovation Foundation of Shanghai Pharmaceutical Association (No. 2016-YY-01-06), the Science Foundation of Medical School affiliated to Shanghai Jiao Tong University (No. 14XJ10033), and the foundation from the Science and Technology Commission of Shanghai Municipality (No. 16401900500, No. 15401901600).

Compliance with Ethical Standards

Conflict of Interest

The authors declare that they have no conflict of interest.

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of PharmacyXinhua Hospital affiliated to Shanghai Jiao Tong University School of MedicineShanghaiChina
  2. 2.Department of Pharmacology and Chemical BiologyShanghai Jiao Tong University School of MedicineShanghaiChina

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