Blockade of cysteinyl leukotriene-1 receptors suppresses airway remodelling in mice overexpressing GATA-3.

We demonstrated previously that GATA-3 overexpression markedly enhanced allergen-induced airway inflammation and airway remodelling, including subepithelial fibrosis, and smooth muscle cell hyperplasia, in transgenic mice. Because cysteinyl leukotrienes (cysLTs) have been shown to be involved in such structural changes, the effects of a specific cysLT1 receptor antagonist, montelukast, were evaluated in a mouse model of chronic asthma. GATA-3-overexpressing mice and wild-type Balb/c mice were sensitized and repeatedly challenged by ovalbumin (OVA) or saline. The effects of montelukast on the development of airway remodelling were compared between the two mouse genotypes. CysLTs in the lung were increased after repeated allergen challenges, and significantly enhanced in GATA-3-overexpressing mice. The enhanced cysLT levels were accompanied by the development of eosinophilia, smooth muscle cell hyperplasia, and increased stromal cell-derived factor-1 gene expression with a small increase in pro-collagen gene expression in OVA-challenged GATA-3-overexpressing mice, but not in wild-type mice. Montelukast significantly decreased lung cysLT levels and inhibited the GATA-3-overexpression-related airway remodelling, potently preventing smooth muscle cell hyperplasia, but partially suppressed the increased pro-collagen gene expression and eosinophilic inflammation. Increases in the levels of IL-4, IL-5, IL-13, and eotaxin in bronchial lavage and TGF-β gene expression in the lungs were induced by OVA in both mouse genotypes. Montelukast treatment also significantly reduced these levels to the levels seen after saline challenges in GATA-3-overexpressing mice. Montelukast efficaciously prevented airway inflammation and remodelling in a GATA-3-overexpression antigen challenge mouse model by decreasing the cysLT-driven Th2 cytokine cycle of amplification of airway pathologies.

Kiwamoto T ，Ishii Y ，Morishima Y ，Yoh K ，Kikuchi N ，Haraguchi N ，Masuko H ，Kawaguchi M ，Nomura A ，Sakamoto T ，Takahashi S ，Hizawa N ... -  《-》

The effects of low dose leukotriene receptor antagonist therapy on airway remodeling and cysteinyl leukotriene expression in a mouse asthma model.

Muz MH ，Deveci F ，Bulut Y ，Ilhan N ，Yekeler H ，Turgut T ... -  《EXPERIMENTAL AND MOLECULAR MEDICINE》

Transcription factors T-bet and GATA-3 regulate development of airway remodeling.

Kiwamoto T ，Ishii Y ，Morishima Y ，Yoh K ，Maeda A ，Ishizaki K ，Iizuka T ，Hegab AE ，Matsuno Y ，Homma S ，Nomura A ，Sakamoto T ，Takahashi S ，Sekizawa K ... -  《AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE》

Transcription factors GATA-3 and RORγt are important for determining the phenotype of allergic airway inflammation in a murine model of asthma.

Ano S ，Morishima Y ，Ishii Y ，Yoh K ，Yageta Y ，Ohtsuka S ，Matsuyama M ，Kawaguchi M ，Takahashi S ，Hizawa N ... -  《-》

Reversal of allergen-induced airway remodeling by CysLT1 receptor blockade.

Henderson WR Jr ，Chiang GK ，Tien YT ，Chi EY ... -  《-》