Your browser doesn't support javascript.
loading
Irritant-induced asthma to hypochlorite in mice due to impairment of the airway barrier.
Van Den Broucke, Sofie; Pollaris, Lore; Vande Velde, Greetje; Verbeken, Erik; Nemery, Benoit; Vanoirbeek, Jeroen; Hoet, Peter.
Afiliação
  • Van Den Broucke S; Centre for Environment and Health, Department of Public Health and Primary Care, University of Leuven, Herestraat 49 Mailbox 706, 3000, Leuven, Belgium.
  • Pollaris L; Centre for Environment and Health, Department of Public Health and Primary Care, University of Leuven, Herestraat 49 Mailbox 706, 3000, Leuven, Belgium.
  • Vande Velde G; Biomedical MRI Unit, Department of Imaging and Pathology, University of Leuven, Leuven, Belgium.
  • Verbeken E; Translational Cell and Tissue Research Unit, Department of Imaging and Pathology, University of Leuven, Leuven, Belgium.
  • Nemery B; Centre for Environment and Health, Department of Public Health and Primary Care, University of Leuven, Herestraat 49 Mailbox 706, 3000, Leuven, Belgium.
  • Vanoirbeek J; Centre for Environment and Health, Department of Public Health and Primary Care, University of Leuven, Herestraat 49 Mailbox 706, 3000, Leuven, Belgium.
  • Hoet P; Centre for Environment and Health, Department of Public Health and Primary Care, University of Leuven, Herestraat 49 Mailbox 706, 3000, Leuven, Belgium. peter.hoet@kuleuven.be.
Arch Toxicol ; 92(4): 1551-1561, 2018 Apr.
Article em En | MEDLINE | ID: mdl-29368146
ABSTRACT
Inhalation of commonly present irritants, such as chlorine and chlorine derivatives, can cause adverse respiratory effects, including irritant-induced asthma (IIA). We hypothesize that due to airway barrier impairment, exposure to hypochlorite (ClO-) can result in airway hypersensitivity. C57Bl/6 mice received an intra-peritoneal (i.p.) injection of the airway damaging agent naphthalene (NA, 200 mg/kg body weight) or vehicle (mineral oil, MO). In vivo micro-computed tomography (CT) images of the lungs were acquired before and at regular time points after the i.p. TREATMENT After a recovery period of 14 days an intranasal (i.n.) challenge with 0.003% active chlorine (in ClO-) or vehicle (distilled water, H2O) was given, followed by assessment of the breathing frequency. One day later, pulmonary function, along with pulmonary inflammation was determined. Lung permeability was assessed by means of total broncho-alveolar lavage (BAL) protein content and plasma surfactant protein (SP)-D levels. In vivo micro-CT imaging revealed enlargement of the lungs and airways early after NA treatment, with a return to normal at day 14. When challenged i.n. with ClO-, NA-pretreated mice immediately responded with a sensory irritant response. Twenty-four hours later, NA/ClO- mice showed airway hyperreactivity (AHR), accompanied by a neutrophilic and eosinophilic inflammation. NA administration followed by ClO- induced airway barrier impairment, as shown by increased BAL protein and plasma SP-D concentrations; histology revealed epithelial denudation. These data prove that NA-induced lung impairment renders the lungs of mice more sensitive to an airway challenge with ClO-, confirming the hypothesis that incomplete barrier repair, followed by irritant exposure results in airway hypersensitivity.
Assuntos
Palavras-chave

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Asma / Ácido Hipocloroso / Irritantes Limite: Animals / Humans Idioma: En Revista: Arch Toxicol Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Bélgica

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Asma / Ácido Hipocloroso / Irritantes Limite: Animals / Humans Idioma: En Revista: Arch Toxicol Ano de publicação: 2018 Tipo de documento: Article País de afiliação: Bélgica