The role of secreted Hsp90α in HDM-induced asthmatic airway epithelial barrier dysfunction.

Abstract:

BACKGROUND:The dysfunction of airway epithelial barrier is closely related to the pathogenesis of asthma. Secreted Hsp90α participates in inflammation and Hsp90 inhibitor protects endothelial dysfunction. In the current study, we aimed to explore the role of secreted Hsp90α in asthmatic airway epithelial barrier function. METHODS:Male BALB/c mice were sensitized and challenged with HDM to generate asthma model. The 16HBE and Hsp90α-knockdown cells were cultured and treated according to the experiment requirements. Transepithelial Electric Resistance (TEER) and permeability of epithelial layer in vitro, distribution and expression of junction proteins both in vivo and in vitro were used to evaluate the epithelial barrier function. Western Blot was used to evaluate the expression of junction proteins and phosphorylated AKT in cells and lung tissues while ELISA were used to evaluate the Hsp90α expression and cytokines release in the lung homogenate. RESULTS:HDM resulted in a dysfunction of airway epithelial barrier both in vivo and in vitro, paralleled with the increased expression and release of Hsp90α. All of which were rescued in Hsp90α-knockdown cells or co-administration of 1G6-D7. Furthermore, either 1G6-D7 or PI3K inhibitor LY294002 suppressed the significant phosphorylation of AKT, which caused by secreted and recombinant Hsp90α, resulting in the restoration of epithelial barrier function. CONCLUSIONS:Secreted Hsp90α medicates HDM-induced asthmatic airway epithelial barrier dysfunction via PI3K/AKT pathway, indicating that anti-secreted Hsp90α therapy might be a potential treatment to asthma in future.

journal_name

BMC Pulm Med

journal_title

BMC pulmonary medicine

authors

Ye C,Huang C,Zou M,Hu Y,Luo L,Wei Y,Wan X,Zhao H,Li W,Cai S,Dong H

doi

10.1186/s12890-019-0938-z

subject

Has Abstract

pub_date

2019-11-20 00:00:00

pages

218

issue

1

issn

1471-2466

pii

10.1186/s12890-019-0938-z

journal_volume

19

pub_type

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