title: Determination of malondialdehyde in breath condensate by high-performance liquid chromatography with fluorescence detection.
abstract: An automated and rapid method for quantifying malondialdehyde (MDA) in breath condensate was developed and validated. The method is based on derivatisation with thiobarbituric acid, HPLC separation and fluorescence detection and is optimised for determination of MDA in breath condensate. Sample collection is non-invasive and simple. The detection limit (4.1 nM) is low, precision is good and the analysis time is short. The response is linear in the concentration range of 0.020 to 1.0 microM. Samples could be stored for 1 month at -20 degrees C and for 3 months at -80 degrees C without losses. Using this method, there was no statistically significant difference between patients with asthma and patients without asthma. However, among females, subjects with asthma had higher MDA levels as compared to females without asthma (0.17 vs. 0.12 pmol/s, p=0.04). The use of the method when studying airway inflammation has to be further evaluated.
authors.affiliation: Department of Occupational Medicine, The Sahlgrenska Academy at Göteborg University, Gothenburg, Sweden. monica.larstad@ymk.gu.se
authors.forename: Monica
authors.initials: M
authors.lastname: Lärstad
authors.forename: Göran
authors.initials: G
authors.lastname: Ljungkvist
authors.forename: Anna-Carin
authors.initials: AC
authors.lastname: Olin
authors.forename: Kjell
authors.initials: K
authors.lastname: Torén
mesh_terms: D001249:Asthma / Q000378:metabolism*; D001944:Breath Tests; D016022:Case-Control Studies; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D008315:Malondialdehyde / Q000378:metabolism*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013050:Spectrometry, Fluorescence
chemical_list: D008315:Malondialdehyde