Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma.

Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Research Abstract Details 

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Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Abstract Text:

Ralph J Delfino,Norbert Staimer,Dan Gillen,Thomas Tjoa,Constantinos Sioutas,Kochy Fung,Steven C George,Michael T Kleinman,

BACKGROUND: Research has shown associations between pediatric asthma outcomes and airborne particulate matter (PM). The importance of particle components remains to be determined. METHODS: We followed a panel of 45 schoolchildren with persistent asthma living in Southern California. Subjects were monitored over 10 days with offline fractional exhaled nitric oxide (FeNO), a biomarker of airway inflammation. Personal active sampler exposures included continuous particulate matter < 2.5 microm in aerodynamic diameter (PM2.5), 24-hr PM2.5 elemental and organic carbon (EC, OC), and 24-hr nitrogen dioxide. Ambient exposures included PM2.5, PM2.5 EC and OC, and NO2. Data were analyzed with mixed models controlling for personal temperature, humidity and 10-day period. RESULTS: The strongest positive associations were between FeNO and 2-day average pollutant concentrations. Per interquartile range pollutant increase, these were: for 24 microg/m3 personal PM2.5, 1.1 ppb FeNO [95% confidence interval (CI), 0.1-1.9]; for 0.6 microg/m3 personal EC, 0.7 ppb FeNO (95% CI, 0.3-1.1); for 17 ppb personal NO2, 1.6 ppb FeNO (95% CI, 0.4-2.8). Larger associations were found for ambient EC and smaller associations for ambient NO2. Ambient PM2.5 and personal and ambient OC were significant only in subjects taking inhaled corticosteroids (ICS) alone. Subjects taking both ICS and antileukotrienes showed no significant associations. Distributed lag models showed personal PM2.5 in the preceding 5 hr was associated with FeNO. In two-pollutant models, the most robust associations were for personal and ambient EC and NO2, and for personal but not ambient PM2.5. CONCLUSION: PM associations with airway inflammation in asthmatics may be missed using ambient particle mass, which may not sufficiently represent causal pollutant components from fossil fuel combustion.

Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Publishing Authors By Initials

RJ Delfino,N Staimer,D Gillen,T Tjoa,C Sioutas,K Fung,SC George,MT Kleinman,

For similar complex mixtures: particulate matter research abstracts see: complex mixtures: particulate matter research

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Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Environmental health perspectives

VOLUME: 114

Page Numbers: 1736-43

Journal Abbreviation: Environ. Health Perspect.

ISSN: 0091-6765

DAY: 3

MONTH: Nov

YEAR: 2006

Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Information

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LANGUAGE: eng

NlmUniqueID: 330411

Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Keywords Mesh Terms:

KEYWORDS: Particulate Matter

MESH TERMS: analysis

Chemical & Substance for Abstract: Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma. Information

Substance Name: Carbon

Registry Number: 7440-44-0

Grant and Affiliation Information for Personal and ambient air pollution is associated with increased exhaled nitric oxide in children with asthma.

AFFILIATION: Epidemiology Division, Department of Medicine, School of Medicine, University of California, Irvine, Irvine, California 92617-7555, USA. rdelfino@uci.edu

Country: United States

AGENCY: United States NIEHS

GRANT: ES11615

ACRONYM: ES

MEDLINETA: Environ Health Perspect

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