Vx-809/Vx-770 treatment reduces inflammatory response to Pseudomonas aeruginosa in primary differentiated cystic fibrosis bronchial epithelial cells.
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Abstract |
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Cystic fibrosis patients exhibit chronic P. aeruginosa respiratory infections and sustained pro-inflammatory state favoring lung tissue damage and remodeling, ultimately leading to respiratory failure. Loss of CFTR function is associated with MAPK hyper-activation and increased cytokines expression, such as the interleukin 8 (CXCL8). Recently, new therapeutic strategies directly targeting the basic CFTR defect have been developed and ORKAMBI (Vx-809/Vx-770 combination) is the only FDA-approved treatment for CF patients homozygous for the F508del mutation. Here we aimed to determine the effect of the Vx-809/Vx-770 combination on the induction of the inflammatory response by fully-differentiated primary bronchial epithelial cell cultures from CF patients carrying F508del mutations, following exposure to P. aeruginosa exoproducts. Our data unveiled that CFTR functional rescue with Vx-809/Vx-770 drastically reduces CXCL8 (as well as CXCL1 and CXCL2) transcripts and p38 MAPK phosphorylation in response to P. aeruginosa exposure through a CFTR-dependent mechanism. These results suggest that ORKAMBI has anti-inflammatory properties that could decrease lung inflammation and contribute to the observed beneficial impact of this treatment in CF patients. |
Year of Publication |
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2017
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Journal |
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American journal of physiology. Lung cellular and molecular physiology
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Date Published |
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2017
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ISSN Number |
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1040-0605
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URL |
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http://www.physiology.org/doi/abs/10.1152/ajplung.00198.2017?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub%3dpubmed
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DOI |
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10.1152/ajplung.00198.2017
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Short Title |
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Am J Physiol Lung Cell Mol Physiol
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