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Altered mucosal immune response after acute lung injury in a murine model of Ataxia Telangiectasia
(2014)
Background: Ataxia telangiectasia (A-T) is a rare but devastating and progressive disorder characterized by cerebellar dysfunction, lymphoreticular malignancies and recurrent sinopulmonary infections. In A-T, disease of the respiratory system causes significant morbidity and is a frequent cause of death.
Methods: We used a self-limited murine model of hydrochloric acid-induced acute lung injury (ALI) to determine the inflammatory answer due to mucosal injury in Atm (A-T mutated)- deficient mice (Atm−/−).
Results: ATM deficiency increased peak lung inflammation as demonstrated by bronchoalveolar lavage fluid (BALF) neutrophils and lymphocytes and increased levels of BALF pro-inflammatory cytokines (e.g. IL-6, TNF). Furthermore, bronchial epithelial damage after ALI was increased in Atm−/− mice. ATM deficiency increased airway resistance and tissue compliance before ALI was performed.
Conclusions: Together, these findings indicate that ATM plays a key role in inflammatory response after airway mucosal injury.