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著者: T Hirano, T Yamagata, M Gohda, Y Yamagata, T Ichikawa, S Yanagisawa, K Ueshima, K Akamatsu, M Nakanishi, K Matsunaga, Y Minakata, M Ichinose
雑誌名: Thorax. 2006 Sep;61(9):761-6. doi: 10.1136/thx.200X.058156.
Abstract/Text
BACKGROUND: Reactive nitrogen species (RNS) are thought to be one of the important factors in the pathogenesis of chronic obstructive pulmonary disease (COPD). A study was undertaken to examine the effects of theophylline and fluticasone propionate (FP) on RNS production in subjects with COPD.
METHODS: Sixteen COPD subjects participated in the study. Theophylline (400 mg/day orally) or FP (400 mug/day inhalation) were administered for 4 weeks in a randomised crossover manner with a washout period of 4 weeks. Induced sputum was collected at the beginning and end of each treatment period. 3-nitrotyrosine (3-NT), which is a footprint of RNS, was quantified by high performance liquid chromatography with an electrochemical detection method as well as by immunohistochemical staining.
RESULTS: Theophylline significantly reduced the level of 3-NT in the sputum supernatant as well as the number of 3-NT positive cells (both p<0.01). FP also reduced 3-NT formation, but the effect was smaller than that of theophylline. Theophylline also significantly reduced the neutrophil cell counts in the sputum (p<0.01), while FP treatment had no effect on the number of inflammatory cells in the sputum, except eosinophils.
CONCLUSIONS: Theophylline reduces nitrative stress and neutrophil infiltration in COPD airways to a larger extent than inhaled corticosteroid.
PMID 16936236 Thorax. 2006 Sep;61(9):761-6. doi: 10.1136/thx.200X.058156.
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