Oncotarget

Research Papers:

Inhibition of endoplasmic reticulum stress alleviates cigarette smoke-induced airway inflammation and emphysema

Yong Wang, Zhen-Zhen Wu and Wei Wang _

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Oncotarget. 2017; 8:77685-77695. https://doi.org/10.18632/oncotarget.20768

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Abstract

Yong Wang1, Zhen-Zhen Wu2 and Wei Wang3

1Department of Pneumology, Affiliated Hefei Hospital of Anhui Medical University, Hefei, Anhui, China

2Department of Immunology, Anqing Medical College, Anqing, Anhui, China

3Pharmaceuticals, Roche R&D Center (China), Shanghai, China

Correspondence to:

Wei Wang, email: [email protected]

Keywords: cigarette smoke, emphysema, airway inflammation, 4-phenylbutyric acid, apoptosis

Received: March 29, 2017    Accepted: August 04, 2017    Published: September 08, 2017

ABSTRACT

Chronic bronchitis and emphysema are pathologic features of chronic obstructive pulmonary disease (COPD). Cigarette smoke (CS)-induced endoplasmic reticulum (ER) stress has been implicated in the COPD development, but the molecular mechanism by which it contributes to COPD etiology and the specific role it plays in COPD pathogenesis remain poorly understood. Here, we aimed to determine the role of ER stress in the pathogenesis of CS-induced airway inflammation and emphysema. Exposure to CS significantly increased the expression of ER stress markers in Beas-2B cells and in mouse lungs, possibly through the production of oxidative stress. Further, inhibition of ER stress by 4-phenylbutyric acid (4-PBA) reduced CS extract-induced inflammation in Beas-2B cells through the modulation of NF-κB signaling. 4-PBA also protected against CS-induced airway inflammation and the development of emphysema in mice, which was associated with a reduction in NF-κB activation and alveolar cell apoptosis in the lungs. Taken together, our results suggest that ER stress is crucial for CS-induced inflammation and emphysema, and that targeting ER stress may represent a novel approach to the treatment of COPD.


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