Concurrence of elevated FeNO and airway hyperresponsiveness in nonasthmatic adolescents

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Kalm-Stephens, Pia,1959-Uppsala universitet,Pediatrisk inflammations- och metabolismforskning samt barnhälsa (author)

Concurrence of elevated FeNO and airway hyperresponsiveness in nonasthmatic adolescents

Article/chapterEnglish2020

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2020-01-15
Wiley,2020
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LIBRIS-ID:oai:DiVA.org:uu-421290
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-421290URI
https://doi.org/10.1002/ppul.24578DOI

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Language:English
Summary in:English

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OBJECTIVES: The aim of this study was to investigate airway responsiveness and eosinophil and neutrophil inflammatory markers in clinically confirmed nonasthmatic adolescents with elevated fractional exhaled nitric oxide (FeNO), a marker of type-2 inflammation in the airways.METHODOLOGY: A total of 959 subjects from a general population, aged 12 to 15 years, answered a standardised questionnaire and underwent FeNO measurements at a screening visit at school. Adolescents without asthma, who had elevated FeNO (FeNO100 > 15 ppb) (n = 19), and control subjects, with low FeNO (FeNO100 < 5 ppb) and without reported symptoms of asthma or allergy (n = 28), participated in a follow-up study where FeNO50 , airway responsiveness to methacholine (PD20 ), blood eosinophil counts, and serum neutrophil lipocalin (HNL) and myeloperoxidase (MPO) levels were measured. Questionnaire follow-ups were performed 4 and 16 years later.RESULTS: Airway responsiveness (PD20 : 6.94 [1.87, 11.39] vs 11.42 [6.33, 59.4] µmol; P < .05) and blood eosinophil counts (0.31 [0.20, 0.44] vs 0.13 [0.1, 0.22] 109 /L; P < .001) (geometric mean [95% CI]) were higher among cases than controls. A significant correlation between blood eosinophils and FeNO was found (rho = 0.41; P = .005). In contrast, serum HNL and MPO were lower in cases than controls (P < .05 both), and there was a negative correlation between HNL and FeNO (r = -0.31; P = .04). At both follow-ups, a higher proportion of subjects reported allergic symptoms compared with baseline (P = .02, P = .01).CONCLUSIONS: Elevated FeNO in nonasthmatic adolescents was associated with airway hyperresponsiveness, elevated blood eosinophil counts, and lower systemic activation of neutrophils.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Lungmedicin och allergi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Respiratory Medicine and Allergy hsv//eng
adolescents
breath test
eosinophilia
nitric oxide
respiratory hypersensitivity
Lungmedicin
Lung Medicine

Added entries (persons, corporate bodies, meetings, titles ...)

Malinovschi, Andrei,1978-Uppsala universitet,Klinisk fysiologi(Swepub:uu)anmal535 (author)
Janson, ChristerUppsala universitet,Lung- allergi- och sömnforskning(Swepub:uu)chrisjn (author)
Venge, PerUppsala universitet,Klinisk kemi(Swepub:uu)pervenge (author)
Nordvall, LennartUppsala universitet,Pediatrisk inflammations- och metabolismforskning samt barnhälsa(Swepub:uu)lennnord (author)
Alving, Kjell,1959-Uppsala universitet,Pediatrisk inflammations- och metabolismforskning samt barnhälsa(Swepub:uu)kjeal631 (author)
Uppsala universitetPediatrisk inflammations- och metabolismforskning samt barnhälsa (creator_code:org_t)

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In:Pediatric Pulmonology: Wiley55:3, s. 571-5798755-68631099-0496

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