Open Access

High-mobility group box 1 impairs airway epithelial barrier function through the activation of the RAGE/ERK pathway

  • Authors:
    • Wufeng Huang
    • Haijin Zhao
    • Hangming Dong
    • Yue Wu
    • Lihong Yao
    • Fei Zou
    • Shaoxi Cai
  • View Affiliations

  • Published online on: March 24, 2016     https://doi.org/10.3892/ijmm.2016.2537
  • Pages: 1189-1198
  • Copyright: © Huang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Recent studies have indicated that high-mobility group box 1 protein (HMGB1) and the receptor for advanced glycation end-products (RAGE) contribute to the pathogenesis of asthma. However, whether the activation of the HMGB1/RAGE axis mediates airway epithelial barrier dysfunction remains unknown. Thus, the aim of this study was to examine the effects of HMGB1 and its synergistic action with interleukin (IL)-1β on airway epithelial barrier properties. We evaluated the effects of recombinant human HMGB1 alone or in combination with IL-1β on ionic and macromolecular barrier permeability, by culturing air-liquid interface 16HBE cells with HMGB1 to mimic the differentiated epithelium. Western blot analysis and immunofluorescence staining were utilized to examine the level and structure of major junction proteins, namely E-cadherin, β-catenin, occludin and claudin-1. Furthermore, we examined the effects of RAGE neutralizing antibodies and mitogen-activated protein kinase (MAPK) inhibitors on epithelial barrier properties in order to elucidate the mechanisms involved. HMGB1 increased FITC-dextran permeability, but suppressed epithelial resistance in a dose- and time-dependent manner. HMGB1-mediated barrier hyperpermeability was accompanied by a disruption of cell-cell contacts, the selective downregulation of occludin and claudin-1, and the redistribution of E-cadherin and β-catenin. HMGB1 in synergy with IL-1β induced a similar, but greater barrier hyperpermeability and induced the disruption of junction proteins. Furthermore, HMGB1 elicited the activation of the RAGE/extracellular signal-related kinase (ERK)1/2 signaling pathway, which correlated with barrier dysfunction in the 16HBE cells. Anti-RAGE antibody and the ERK1/2 inhibitor, U0126, attenuated the HMGB1-mediated changes in barrier permeability, restored the expression levels of occludin and claudin-1 and pevented the redistribution of E-cadherin and β-catenin. Taken together, the findings of our study demonstrate that HMGB1 is capable of inducing potent effects on epithelial barrier function and that RAGE/ERK1/2 is a key signaling pathway involved in the crosstalk between formations of junction proteins and epithelial barrier dysfunction.
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May-2016
Volume 37 Issue 5

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Huang W, Zhao H, Dong H, Wu Y, Yao L, Zou F and Cai S: High-mobility group box 1 impairs airway epithelial barrier function through the activation of the RAGE/ERK pathway. Int J Mol Med 37: 1189-1198, 2016
APA
Huang, W., Zhao, H., Dong, H., Wu, Y., Yao, L., Zou, F., & Cai, S. (2016). High-mobility group box 1 impairs airway epithelial barrier function through the activation of the RAGE/ERK pathway. International Journal of Molecular Medicine, 37, 1189-1198. https://doi.org/10.3892/ijmm.2016.2537
MLA
Huang, W., Zhao, H., Dong, H., Wu, Y., Yao, L., Zou, F., Cai, S."High-mobility group box 1 impairs airway epithelial barrier function through the activation of the RAGE/ERK pathway". International Journal of Molecular Medicine 37.5 (2016): 1189-1198.
Chicago
Huang, W., Zhao, H., Dong, H., Wu, Y., Yao, L., Zou, F., Cai, S."High-mobility group box 1 impairs airway epithelial barrier function through the activation of the RAGE/ERK pathway". International Journal of Molecular Medicine 37, no. 5 (2016): 1189-1198. https://doi.org/10.3892/ijmm.2016.2537