Abstract:
BACKGROUND:Asthma-like symptoms in young children are orchestrated by the local airway immune response, but current knowledge largely relies on in vitro airway models. Azithromycin has been shown to reduce the duration of episodes with asthma-like symptoms, but efficacy may depend on the individual child's immune response. OBJECTIVES:To investigate in vivo upper airway immune mediator levels during episodes with asthma-like symptoms in young children and their ability to predict the clinical response to azithromycin treatment. METHODS:A total of 535 children aged 0-3 years from the Copenhagen Prospective Studies of Asthma in Childhood-2010 mother-child cohort were examined for immune mediator levels in samples of nasal epithelial lining fluid during episodes with asthma-like symptoms as well as in the asymptomatic state. In a sub-study, children with recurrent asthma-like symptoms were randomized to either a 3-day course of oral azithromycin (10 mg/kg; n = 32) or placebo (n = 38). In the current study, we compared the pretreatment immune mediator levels with the clinical response to treatment with azithromycin in an exploratory post hoc analysis. RESULTS:The immune mediator concentrations during vs outside episodes were significantly upregulated for IFN-ɣ (ratio 1.73), TNF-α (ratio 2.05), IL-1β (ratio 1.45), IL-10 (ratio 1.97), while CCL22 (ratio 0.65) was downregulated. Low levels of TNF-α and IL-10 and high levels of CCL22 predicted better treatment response to azithromycin (P-values < .05). CONCLUSION:Upper airway immune mediator levels were altered during episodes of asthma-like symptoms, and levels of TNF-α, CCL22, and IL-10 may predict the response to azithromycin treatment.
journal_name
Allergyjournal_title
Allergyauthors
Carlsson CJ,Rasmussen MA,Pedersen SB,Wang N,Stokholm J,Chawes BL,Bønnelykke K,Bisgaard Hdoi
10.1111/all.14651subject
Has Abstractpub_date
2020-11-04 00:00:00eissn
0105-4538issn
1398-9995pub_type
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