title: [The effect of inhaled corticosteroid on the fraction of exhaled nitric oxide (FeNO) with off-line method in adult Japanese asthmatics].
abstract: BACKGROUND
  The fraction of exhaled nitric oxide (FeNO) is a useful marker of asthma control. The FeNO measurement with our offline method using SIEVERS bag collection kit may be more affordable, but there have been no studies to show the effect of anti-asthmatic therapy on FeNO with our offline method.
  
  
  METHODS
  The study population comprised 36 steroid-naïve asthmatics at our outpatient clinic. We treated them according to asthma prevention and management guideline 2006, Japan. We also measured eNO levels by our offline method and spirometory on baseline, 4weeks, and 12 weeks of treatment.
  
  
  RESULTS
  All asthmatics were symptom-free on 12 weeks of treatment. The levels of FeNO FEV1/FVC were significantly decreased on 4 weeks and 12 weeks of treatment, compared with that on first visit. We classified the subjects into two groups; (A) FEV1/FVC <70% (n=11) or (B) FEV1/FVC > or =70% (n=25) on baseline. In (A) group, the level of FeNO and FEV1/FVC were significantly improved on 4 and 12 weeks of treatment. In (B) group, on 4 weeks of treatment, the level of FEV1/FVC was significantly increased but the level of FeNO was not significantly changed. On 12 weeks of treatment, the levels of FeNO was significantly decreased, but the level of FEV1/FVC was not significantly changed.
  
  
  CONCLUSIONS
  The levels of FeNO were decreased by antiasthmatic therapy, so that offline monitoring of eNO will facilitate the management of bronchial asthma in patients treated with these drugs.
authors.affiliation: Clinical Research Center for Allergy and Rheumatology, National Hospital Organization, Sagamihara National Hospital. t-tuburai@Sagamihara-hosp.gr.jp
authors.forename: Takahiro
authors.initials: T
authors.lastname: Tsuburai
authors.forename: Naomi
authors.initials: N
authors.lastname: Tsurikisawa
authors.forename: Noritaka
authors.initials: N
authors.lastname: Higashi
authors.forename: Ai
authors.initials: A
authors.lastname: Higashi
authors.forename: Sonoko
authors.initials: S
authors.lastname: Morita
authors.forename: Yuma
authors.initials: Y
authors.lastname: Fukutomi
authors.forename: Hidenori
authors.initials: H
authors.lastname: Tanimoto
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Sekiya
authors.forename: Chiyako
authors.initials: C
authors.lastname: Oshikata
authors.forename: Emiko
authors.initials: E
authors.lastname: Ono
authors.forename: Mamoru
authors.initials: M
authors.lastname: Otomo
authors.forename: Yuji
authors.initials: Y
authors.lastname: Maeda
authors.forename: Masami
authors.initials: M
authors.lastname: Taniguchi
authors.forename: Kunihiko
authors.initials: K
authors.lastname: Ikehara
authors.forename: Kazuo
authors.initials: K
authors.lastname: Akiyama
mesh_terms: D000280:Administration, Inhalation; D000305:Adrenal Cortex Hormones / Q000008:administration & dosage*; D001249:Asthma / Q000188:drug therapy* / Q000503:physiopathology*; D001944:Breath Tests; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009569:Nitric Oxide / Q000032:analysis*
chemical_list: D000305:Adrenal Cortex Hormones; D009569:Nitric Oxide