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- W2605622785 abstract "Background: Cystic fibrosis (CF) is the most common autosomal-recessive disorder in western countries. Previous studies have demonstrated an important role of sphingolipids in the pathophysiology of cystic fibrosis. It has been shown that ceramide has a central role in various pulmonary infections, including those with Pseudomonas aeruginosa (P. aeruginosa). Ceramide is accumulated in the airways of CF mice and patients. However, little is known about a potential role of glucosylceramide in cystic fibrosis. Methods: We investigated the expression of glucosylceramide and lactosylceramide in the respiratory tract of murine and human CF samples by immunohistochemistry and analyzed effects of glucosylceramide on P. aeruginosa in vitro. We performed pulmonary infections with P. aeruginosa and tested inhalation with glucosylceramide. Results: We demonstrate that glucosylceramide is down-regulated on the apical surface of bronchial and tracheal epithelial cells in cystic fibrosis mice. Although glucosylceramide did not have a direct bactericidal effect on Pseudomonas aeruginosa in vitro, inhalation of CF mice with glucosylceramide protected these mice from infection with P. aeruginosa, while non-inhaled CF mice developed severe pneumonia. Conclusion: Our data suggest that glucosylceramide acts in vivo in concert with ceramide and sphingosine to determine the pulmonary defense against P. aeruginosa." @default.
- W2605622785 created "2017-04-28" @default.
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- W2605622785 date "2017-01-01" @default.
- W2605622785 modified "2023-09-27" @default.
- W2605622785 title "Glucosylceramide Critically Contributes to the Host Defense of Cystic Fibrosis Lungs" @default.
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- W2605622785 doi "https://doi.org/10.1159/000464382" @default.
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