title: Assessment of airway inflammation by exhaled breath condensate and impedance due to gastroesophageal reflux disease (GERD).
abstract: Avoiding oxidative stress in the airways is important for the treatment of respiratory disease associated with gastroesophageal reflux disease (GERD). It is often difficult to decide whether GERD is causing airway inflammation or whether an airway disease is complicated by GERD. Measurement of exhaled breath condensate (EBC) is performed by cooling and collecting the airway lining fluid contained in exhaled air. A decrease of pH and an increase of the 8-isoprostane concentration in EBC have been observed in patients with mild to moderate asthma accompanied by GERD. There are still problems to be overcome before EBC can be used clinically, but pH and 8-isoprostane may be promising objective markers of airway inflammation due to GERD. The disease concept and diagnosis of GERD are constantly advancing, including the development of impedance methods. It is expected that treatment will be based on the latest diagnostic knowledge of GERD associated with respiratory disease and on monitoring of airway inflammation.
authors.affiliation: Department of Medicine and Molecular Science, Gunma University Graduate School of Medicine, Maebashi Showa-machi, Gunma, Japan. yasuos@med.gunma-u.ac.jp
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Shimizu
authors.forename: Kunio
authors.initials: K
authors.lastname: Dobashi
authors.forename: Atsuto
authors.initials: A
authors.lastname: Nagoshi
authors.forename: Osamu
authors.initials: O
authors.lastname: Kawamura
authors.forename: Masatomo
authors.initials: M
authors.lastname: Mori
mesh_terms: D001249:Asthma / Q000150:complications / Q000175:diagnosis* / Q000276:immunology / Q000473:pathology / Q000503:physiopathology; D015415:Biomarkers / Q000032:analysis; D001823:Body Composition; D001944:Breath Tests / Q000295:instrumentation / Q000379:methods; D016207:Cytokines / Q000032:analysis; D015237:Dinoprost / Q000031:analogs & derivatives / Q000032:analysis; D017097:Electric Impedance; D004947:Esophagus / Q000276:immunology* / Q000378:metabolism; D005764:Gastroesophageal Reflux / Q000150:complications / Q000175:diagnosis* / Q000276:immunology / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007249:Inflammation; D018836:Inflammation Mediators / Q000032:analysis; D018384:Oxidative Stress; D020545:Respiratory Mucosa / Q000276:immunology* / Q000378:metabolism
chemical_list: D015415:Biomarkers; D016207:Cytokines; D018836:Inflammation Mediators; C075750:8-epi-prostaglandin F2alpha; D015237:Dinoprost