Asthma is associated with structural remodelling processes, including basement membrane thickening, increased vascularity and smooth muscle alterations. It is known that respiratory infections are associated with asthma exacerbation; infections can worsen asthma symptoms and influence susceptibility to asthma onset. How infections affect asthma is not fully elucidated. It is possible that the immune response, due to recurrent infections, leads to the pathogen's eradication but also increases bronchial inflammation, which induces airway remodelling in asthmatic subjects. We evaluated how infection affects lung remodelling and inflammatory responses and assessed the impact of antibiotic treatment in a murine model of asthma. Ovalbumin-sensitised BALB/c mice were divided into control, mild and chronic asthmatics. A subset of animals in each group was infected with Streptococcus pneumoniae and was treated with antibiotics. The results show an increase in key lung remodelling factors in mice with chronic asthma, particularly those infected with S. pneumoniae. Notably, antibiotic therapy attenuated these effects. These findings demonstrate for the first time that prompt antibiotic therapy may be useful to reduce lung remodelling progression in infected asthmatic subjects.

Antibiotics counteract the worsening of airway remodelling induced by infections in asthma / V. Lucini, R. Ciracì, S. Dugnani, M. Pannacci, F. Pisati, A. Caronno, G. Tirone, F. Scaglione. - In: INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS. - ISSN 0924-8579. - 43:5(2014 May), pp. 442-450.

Antibiotics counteract the worsening of airway remodelling induced by infections in asthma

V. Lucini
Primo
;
R. Ciracì
Secondo
;
S. Dugnani;F. Scaglione
2014-05

Abstract

Asthma is associated with structural remodelling processes, including basement membrane thickening, increased vascularity and smooth muscle alterations. It is known that respiratory infections are associated with asthma exacerbation; infections can worsen asthma symptoms and influence susceptibility to asthma onset. How infections affect asthma is not fully elucidated. It is possible that the immune response, due to recurrent infections, leads to the pathogen's eradication but also increases bronchial inflammation, which induces airway remodelling in asthmatic subjects. We evaluated how infection affects lung remodelling and inflammatory responses and assessed the impact of antibiotic treatment in a murine model of asthma. Ovalbumin-sensitised BALB/c mice were divided into control, mild and chronic asthmatics. A subset of animals in each group was infected with Streptococcus pneumoniae and was treated with antibiotics. The results show an increase in key lung remodelling factors in mice with chronic asthma, particularly those infected with S. pneumoniae. Notably, antibiotic therapy attenuated these effects. These findings demonstrate for the first time that prompt antibiotic therapy may be useful to reduce lung remodelling progression in infected asthmatic subjects.
Antibiotics; Lung remodelling; Respiratory infections; Animals; Anti-Bacterial Agents; Asthma; Disease Models, Animal; Lung; Male; Mice, Inbred BALB C; Pneumococcal Infections; Respiratory Tract Infections; Airway Remodeling; Microbiology (medical); Infectious Diseases; Pharmacology (medical); Medicine (all)
Settore BIO/14 - Farmacologia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/433967
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