Budesonide and Calcitriol Synergistically Inhibit Airway Remodeling in Asthmatic Mice.

Abstract:

Background and Objective:While calcitriol can inhibit airway remodeling in asthmatic mice, the mechanism remains unclear. The purpose of this study was to explore the mechanism of action of calcitriol on airway remodeling in asthma and its interaction with budesonide. Methods:A mouse model of asthma was established by allergic sensitization and challenge with ovalbumin. The mice were treated with budesonide, calcitriol, or budesonide plus calcitriol. The expression of airway remodeling-related proteins, transforming growth factor β (TGFβ) signaling pathway-related proteins, the glucocorticoid receptor, and vitamin D receptor (VDR) was determined by immunohistochemical staining and Western blot analysis. Quantitative real-time PCR was used to determine the expression of microRNA-21 (miR-21) in the lung tissue of mice. Results:Monotherapy with budesonide or calcitriol inhibited the high expression of collagen type I protein and upregulated the low expression of Smad7 in asthmatic mice. There was a synergistic interaction between budesonide and calcitriol in combined treatment. The expression of miR-21 in the combined treatment group was significantly lower than that in the calcitriol treatment group. VDR expression in the combined treatment group was significantly higher than that of the calcitriol treatment group. Conclusion:Budesonide and calcitriol have a synergistic effect on airway remodeling in asthmatic mice.

journal_name

Can Respir J

authors

Qian J,Xu Y,Yu Z

doi

10.1155/2018/5259240

subject

Has Abstract

pub_date

2018-05-02 00:00:00

pages

5259240

eissn

1198-2241

issn

1916-7245

journal_volume

2018

pub_type

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