Epithelia in the human airways, from the nasal aperture to the alveoli, are covered in a protective film of fluid containing a number of antimicrobial proteins. Defensins are singlechain, strongly cationic peptides and are one of the most extensively studied classes of antimicrobial peptides. Moxifloxacin (MXF) is a fluoroquinolone that acts against both Gram positive and Gram negative bacteria. In this study, we evaluated the effects of HBD2, MXF and the association MXF/HBD2 on some cytokines and on the ICAM-1 expression in LPSstimulated A549 cells. Our results suggest that by lowering the epithelial cell-derived IL-1b, IL-6, IL-8 and ICAM-1 expression, the MXF/HBD2 association interferes with the multifunctional cytokine network evolving during inflammatory processes of the respiratory tract; this anti-inflammatory potential could be of great value in the treatment of inflammatory disorders.

Anti-inflammatory effects of moxifloxacin and human beta-defensin 2 association in human lung epithelial cell line (A549) stimulated with lipopolysaccharide.

DONNARUMMA, Giovanna;BUOMMINO, Elisabetta;IOVENE, Maria Rosaria;
2007

Abstract

Epithelia in the human airways, from the nasal aperture to the alveoli, are covered in a protective film of fluid containing a number of antimicrobial proteins. Defensins are singlechain, strongly cationic peptides and are one of the most extensively studied classes of antimicrobial peptides. Moxifloxacin (MXF) is a fluoroquinolone that acts against both Gram positive and Gram negative bacteria. In this study, we evaluated the effects of HBD2, MXF and the association MXF/HBD2 on some cytokines and on the ICAM-1 expression in LPSstimulated A549 cells. Our results suggest that by lowering the epithelial cell-derived IL-1b, IL-6, IL-8 and ICAM-1 expression, the MXF/HBD2 association interferes with the multifunctional cytokine network evolving during inflammatory processes of the respiratory tract; this anti-inflammatory potential could be of great value in the treatment of inflammatory disorders.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11591/197670
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