GPR120/FFAR4 stimulation attenuates airway remodeling and suppresses IL-4- and IL-13-induced airway epithelial injury via inhibition of STAT6 and Akt - 11/11/23
Abstract |
Background |
Airway remodeling is associated with severity and treatment insensitivity in asthma. This study aimed to investigate the effects of G protein-coupled receptor 120 (GPR120) stimulation on alleviating allergic inflammation and remodeling of airway epithelium.
Research design and methods |
Ovalbumin (OVA)-challenged BALB/c mice and type-2-cytokine (IL-4 and IL-13)-exposed 16HBE human bronchial epithelial cells were treated with GSK137647A, a selective GPR120 agonist. Markers of allergic inflammation and airway remodeling were determined.
Results |
GSK137647A attenuated inflammation and mucus secretion in airway epithelium of OVA-challenged mice. Stimulation of GPR120 in 16HBE suppressed expression of asthma-associated cytokines and cytokine-induced expression of pathogenic mucin-MUC5AC. These effects were abolished by co-treatment with AH7614, a GPR120 antagonist. Moreover, GPR120 stimulation in 16HBE cells reduced expression of fibrotic markers including fibronectin protein and ACTA2 mRNA and inhibited epithelial barrier leakage induced by type-2 inflammation via rescuing expression of zonula occludens-1 protein. Furthermore, GPR120 stimulation prevented the cytokine-induced airway epithelial remodeling via suppression of STAT6 and Akt phosphorylation.
Conclusions |
Our findings suggest that GPR120 activation alleviates allergic inflammation and remodeling of airway epithelium partly through inhibition of STAT6 and Akt. GPR120 may represent a novel therapeutic target for diseases associated with remodeling of airway epithelium, including asthma.
Le texte complet de cet article est disponible en PDF.Highlights |
• | GSK137647A (GPR 120 agonist) attenuated allergic airway inflammation and mucus secretion in allergic asthma in vivo. |
• | GSK137647A inhibited IL-4- and IL-13-induced allergic inflammation by reducing expression of MUC5AC, asthmatic cytokine transcripts, and fibrosis markers in 16HBE cells. |
• | GPR120 stimulation suppressed the cytokine-induced tight junction disruption in 16HBE cells via STAT-6 and Akt. |
Keywords : Asthma, GPR120, FFAR4, Airway remodeling, IL-13, STAT6
Plan
Vol 168
Article 115774- décembre 2023 Retour au numéro
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