title: Time course of exhaled hydrogen peroxide and nitric oxide during chemotherapy.
abstract: This study was designed to assess the effect of differential leukocyte depletion during chemotherapy by monitoring the levels of exhaled hydrogen peroxide H2O2 and nitric oxide (F(eNO)) present. In 39 patients with lung cancer (chronic obstructive pulmonary disorder up to stage II, median forced expiratory volume in one second 78% predicted), measurements were performed before a cycle of therapy (day 1), at least once during the cycle (day 8: n = 34; day 15: n = 19), and afterwards (days 21-29). There were significant changes in the level of H2O2, F(eNO) and peripheral blood cell differentials over the visits. The level of H2O2 was decreased only on day 15, with a median (difference between the upper and lower quartiles) fall of 31 (57)%, while F(eNO) was reduced only on day 8, by 22 (40)%. Neutrophil numbers were unchanged on day 8 and decreased by 59 (48)% on day 15, while monocyte numbers were decreased on day 8 by 87 (39)%. On days 21-29, values had returned to baseline. Taken together with previous findings, the parallel course of levels of exhaled hydrogen peroxide and neutrophil counts suggests that a major part of exhaled hydrogen peroxide is due to neutrophils via the conducting airways. In contrast, the production of exhaled nitric oxide seems to be primarily associated with monocytes.
authors.affiliation: Hospital Grosshansdorf, Center for Pneumology and Thoracic Surgery, Wöhrendamm 80, D-22927 Grosshansdorf, Germany.
authors.forename: A R
authors.initials: AR
authors.lastname: Wewel
authors.forename: J A M
authors.initials: JA
authors.lastname: Crusius
authors.forename: U
authors.initials: U
authors.lastname: Gatzemeier
authors.forename: M
authors.initials: M
authors.lastname: Heckmayr
authors.forename: G
authors.initials: G
authors.lastname: Becher
authors.forename: H
authors.initials: H
authors.lastname: Magnussen
authors.forename: R A
authors.initials: RA
authors.lastname: Jörres
authors.forename: O
authors.initials: O
authors.lastname: Holz
mesh_terms: D045853:Exhalation; D005260:Female; D006801:Humans; D006861:Hydrogen Peroxide / Q000378:metabolism*; D007958:Leukocyte Count; D008175:Lung Neoplasms / Q000097:blood / Q000150:complications / Q000188:drug therapy* / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D009504:Neutrophils; D009569:Nitric Oxide / Q000378:metabolism*; D029424:Pulmonary Disease, Chronic Obstructive / Q000150:complications; D013997:Time Factors
chemical_list: D009569:Nitric Oxide; D006861:Hydrogen Peroxide